f/?.(JJf!("T 1/33.0 z.. CONFIDENTIAU NEW REAGENT SYSTEMS PLANT TRIAL AT WINDSOR MINERALS INC. G. Plaintiff's Exhibit J&J 335 ~, Protected Document--Subject to Protective Order J NJ MX68_000004996 INTRODUCTION: • • Windsor Minerals has been actively engaged in a froth floatation research program for the past year and a half. This program has developed two floatation reagent systems which offer substantial advantages to the Windsor floatation process from an economic, purity "and potential health hazard point of view. In the absence of known deleterious effects attributable to these reagent systems and in response to the favorable results in testing performed by Baby Products Research in New Brunswick, Windsor Minerals scheduled a plant t~ial as a guide for establishment of the product and process parameters under actual operating conditions. The plant trial was conducted on January 29, 1974. Dur~ng this cosmetic grade ta1cs were produced using both new reagent systems, i.e., n-buty1 alcohol and n-byty1 alcohol-citric acid in combination. tri~l The following report will d~al with the product and process parameters of the trial as determined by Windsor Minerals and outside consultants. CONCLUSIONS 1. A reduction in total acid soluble materials was attributable to the new reagent systems. The magnitude of the reduction was 23%- for n-butanol and 28% for n-butanol-citric acid. 2. A similar decrease in "magnesite' levels was effected. The decrease was 23% using n-butano1 and 30% for the n-butano1-citric acid combination. 3. A color (reflectance) increase of' 1. 0 units was effected while using n-butano1; an increase of 1.4 units was attributed to the n-butanol-citric acid system. ) ,'" i\'!~ 4.:2 Chrysotile fiber supression was indicated while ,using the n-butanol-citric acid system. 5. Talc recoveries were higher while using the'new reagent systems. The increases were 17% for n-butanol and 19% for n-butanol-citric acid. 6. ,',fhe chlorite content of the floated product was reduced 14% ~hile using n-butanol and 15% while using n-butano1-citric acid. 7. A substantial decrease in the bulk density of the product was noted while using the new ~eagent systems. The decreases were 2.06,lb/ft 3 and 2.82 1b/ft j respectively for the n-butanol,and n-butanol-citric acid systems, corresponding to decreases on a percentage basis of 8.4% and 13.0%. -1- Protected Document--Subject to Protective Order J NJ MX68_000004997 • • J\ 8. The platy nature of the talc product was found to be unchanged by the use of the.new reagent systems. 9. The pH of n-butanol-citric acid floated talc was significantly closer to neutrality than current production. The decrease in alkalinity was measured to be 1.25 pH units for material made during the plant trial. ~ '.Lv 10. 11. \ Particle size distribution profiles were similar for materials floated with Ultrawet D.S., n-butanol, and n-butanol-citric acid. Optical microscopy indicates a high degree of similarity with relation to the size and shape factors of materials produced during the plant trial. Minor differences were noted with respect to talc shards and rolled edges. The producE differences,.however, correspond qU1te closely with differences found in the ores from which the products were beneficiated. ! OPERATIONAL DESCRIPTION At 4:30 AM on January 29, 1974, immediately prior to the plant trial using the n-butanol based reagent systems, 1000 pounds of Ultrawet D.S. floated talc was collected and packaged in 4 fiber drums. At the same time a representative ore sample was collected. These materials were used as a reference for the plant trial products. . The floatation circuit was then purged for 3 hours to remove the residual Ultrawet, after which n-butyl alcohol was added at a rate of 1.08 liters per ton of floatation feed. Sampling was begun after 30 minutes and continued on a 30 minute basis thereafter. The samples were immediately analyzed by the Windsor Minerals Q.A. Laboratory. After establishing that equilibrium conditions had been reached in the floatation circuitry a 1000 pound sample of finished product was taken and stored in fiber drums for further studies. o.J. 0/0 Following collection of the n-butanol floated product, citric ~ acid was added to the circuit at a rate of 4 pounds of citric acid per ton of floatation feed, while maintaining the n-butanol additions as before. When the circuit was judged to have reached equilibrium conditions based upon the analytical results, another 1000 pound samp~~ of finished product was taken and stored in fiber drums, also for future studies. -2- Protected Document--Subject to Protective Order J NJ MX68_000004998 , • • \ SAMPLING Production sampling for quality assurance purposes was begun at 9:30 AM on 1/29/74 and continued at half hour intervals for the duration of the plant trial. The following table lists the materials sampled and the analysesperfo~ed during the trial. Material Sampled Quality Assurance Analytical Schedule % Acid Color -325 % MagBulk Sample Inso1u- Ref1ec- pH Mesh nesite Screen Density tance bles Qty. Ore 500g X Tailings 250cc X Cleaner Concentrate 500cc X X X X X X Table 1 500g Product X X X X X Composite ore and tailings sampies were collected 30 minutes prior to and during each product collection. A product composite for each reagent system used was also obtained from the material packaged in fiber drums. The composites were then used for the development of analytical . data for comparative purposes in assessing the effects of the reagent systems upon the process and resulting products. EXPERIMENTAL & RESULTS Table 2 displays a compilation of Quality Assurance data obtained during the test run. The results were used for circuit control, establishment of operational parameters, and talc recovery calculations. Product composite samples representing materials made with Ultrawet D.S., n-butanol and n-butanol-citric acid were analyzed in accordance with our standard certification procedures. These results, in the form of a standard laboratory report are given in Tables 3, 4 and 5. The data in these tables confi~s that the new reagent systems provide substantially improved products in the following categories: . ).. r '2. total acid solubles magnesite 3. color 4. bulk density 5. pH -3- Protected Document--Subject to Protective Order J NJ MX68_000004999 • • , \ i \ There were no specification categories in which a decrease in product qualities were observed. Table 6 provides the trial results in terms of talc recovery. Talc recovery was calculated using the relationship: % Recovery = 100 fH-T~ x C C-T " Ii where: H = % acid insoluble content of ore T = % acid insoluble content of tailings C = % acid insoluble content of cleaner concentrate Recoveries were derived by obtaining mean acid insoluble values for ore, tailings, and cleaner concentrates trom Table 2 for the time period during which the specified reagent was used. These values were compared to the 8 hour production shift immediately preceding the reagent trial during which time Ultrawet D.S. was the floatation reagent. It is apparent from Table 6 that a substantially higher recovery is afforded by the use of n-butanol based floatation systems. _ . Particle size measurements were performed by two methods; sedimentation velocity using the Andreasen Sedimentation Pipette and by actual optical measurement using the 'rtMC Image Analyzing system. The results are given in Tables 7-12 and graphically d~splayed in Figures 1-9. The particle size distribution profiles indicate the similarity of the products within the framework of the technique used for measurement. However, we have noted and confirmed that differences between the techniques and the values obtained via the techniques do exist. It has been our experience that the direct measurement of particle size and shape which is possible with the Image Analyzing method is a superior determination to the indirect measurements made by the sedimentation method. ,r I o~J \ On this basis,potential benefit is indicated in that the optical measuring technique has veri ed a lower fine article content reporting in the f1nished-pro uct when usin the a co 0 a e s e s parcfcularlythe n-butanol-citric acid system. This fact ha~ been confirmed by Walter C. McCro~e Associates who have reported the same conclusions based on their optical studies. Mineralogical examinations for detection of amphiboles were performed by Dr. R. Reynolds at Dartmouth College on the composite ore and product samples. The results for the Ultrawet D.S., n-butanol and n-butanol-citric acid floated products are given in Table lJ;·..and Attachment C, titled "Mineralogy or Ores, Product and Mill Tails Re Different Floatation Reagents". . . -4Protected Document--Subject to Protective Order J NJ MX68_000005000 , • • There were no significant differences with respect to the amphibole content in the test products. The detected amphibole minerals did not appear in a fibrous f~rm in any of the product samples. Mineralogical analyses using X-ray diffraction techniques were performed on the composite ore, tailings and talc products during each segment of the reagent trial periods., This work was performed by Dr. Reynolds; the results are given in Table 14 and Figure 10. The essentia IJIii ical content of the three ore sam les were Analysis of the finished products by X-ray techniques indicate a su stantial , .. reduction in chlorite content attributable to the alcohol base sys ems. Analysis of the tailings resulting from the use of the three different reagent systems by X-ray diffraction identifies a profound difference in the mineralogical composition. As shown in Figure 10, talc peaks in the alcohol based system tails are roughly one tenth the intensity as found in the Ultrawet system tails. Optical microscopic examination· of the tailing fractions from the alcohol based systems also indicates that the small quantity of talc present is essentially all a blocky or non-platy variety. These results confirm the substantial talc recovery differences between the Ultrawet and n-butanol based systems which had been independently determined by chemical analyses. Asbestifonn analyses were performed by Walter C. McCrone Associates by means of transmission electron microscopy and electron diffraction techniques. Their report is found in attachment "A". An abstract of their findings is given in Table 15. Quantitative treatment of these results is questionable due to the extremely low chrysotile levels present, however depression of chrysotile through the use of citric acid in combination with n-butanol is indicated. To better quantify the depressive affects of citric acid upon magnesiumsurfaced asbest iforms, Attachment "B" titled "Asbest ifo'rm depression through the use of new floatation reagent systems" is included to provide details of an earlier stud~ in this area. SUMMARY & REMARKS The results of the plant trials using n-butanol and n-butanolcitric,acid reagent systems a~ compared to the presently used Ultrawet 0.5. sy.stem has indicated a marked superiority of these new systems. , , The use of citric acid in the depression of chrysotile a.sbestos}'i~~~~v and other mineral species has been developed at Windsor Minerals in U response to the potential need for a means to exclude extremely low levels of these contaminants from the finished product of the beneficiation process. . . /' .. '.. ~ ' .. I I ( '0 I .::- The use of'these systems' is -'strongly urged by this writer, 'to provide the protection against what:are currently considered to be -5- I I Protected Document--Subject to Protective Order I J NJ MX68_000005001 • • materials presenting a severe health hazard and are potentially present in all talc ores in use at this time. In closing, based on Windsor's knowledge of the physical chemistry of talc, and upon the results of all work performed to date, it is our strong belief that the use of these new reagent systems will not alter the salient consumer properties of the raw material supply or the finished baby powder sold un~he JOh~d Johnson. name. ve:::::::&l 0Manager, Researsh and Development Windsor Minerals Inc. 5/14./74 -6- Protected Document--Subject to Protective Order J NJ MX68_000005002 Table 2 • • QUALITY ASSURANCE SAMPLING TEST RESULTS SAmPLE DESICNATION TImE ACID INSOLUBlES (%) 9:30 ORE 10; 00 . '0:30 . 11:00 . I I 11 :30 '. i' " 12:00 COLOR REflECTANCE pH 73.4 (%) 90.93 TAILINGS 28.32 CLEANER CONCENTRATE 99.05 88.0 7.57 PRODUCT 99.08 87.2 8.06 ORE 62.15 73.8 TAILINGS 25.84 CLEANER CONCENTRATE 98.94 67.3 7.78 PRODUCT 99.18 87.4 7.92 ORE 64.80 74.6 TAILINGS 24.95 CLEANER CONCENTRATE 98.94 87.1 7.79 PRODUCT. 98.83 87.3 7.92 ORE 61.62 74.8 TAILINGS 26.26 CLEANER CONCENTRATE 98.80 87.3 7.81 PRODUCT 98.85 87.0 7.99 ORE 65.79 74.8 TAILINGS 26.40 CLEANER CONCENTRATE P.RODUCT 98.76 87.2 8.42 98.86 . 87.4 8.44 ORE 65.02 TAILINGS 28.86 CLEANER CONCENTRATE 98.97 87.3 8.19 PRODUCT 98.75 87.2 8.10 Protected Document--SubJect to Protective Order /'IIAGNESIl (lb./rt;' (%) (%) 58.98 BUI,.K DENSITY -325 m. SCREEN 89.07 24.61 .54 23.93 .54 90.40 90.47 . 90.05 , 89.70 23.20 .58 23.34 .64 90.09 89.93 89.86 , . 74.4 89.45 23.04 .71 90.38 " . 90.47 , 22.63 .71 J NJ MX68_000005003 'Table 2 Continued SAmPLE DESIGNATION· TIlliE • ACID INSOlUBLES (%) I 12::50 I , 13:00 13::30 . . 14:00 • COLOR REFLECTANCE pH -325 m SCREEN BUl,.K DENSITY (lb./ft~ (%) (%) ORE 66.28 TAILINGS 24.13 CLEANER CONCENTRATE 98.54 86.:5 8.19 PRODUCT 98.60 86.7 8.10 ORE 6:5.67 75.0 TAILINGS 28.82 CLEANER CONCENTRATE 98.49 86.4 7.89 PRODUCT 98.40 86.4 7.81 ORE 64.27 75.3 TAILINGS 23.37 CLEANER CONCENTRATE 98.56 86.9 6.38 PRODUCT 98.47 87.2 7.42 ORE 61.17 75,3 TAILINGS 26.05 CLEANER CONCENTRATE 98.78 87.3 5.28 PRODUCT 98.67 87.3 7.01 ORE 'J.(. ':Ib 75.3 TAILINGS 24.27 CLEANER CONCENTRATE 98.67 87.1 4.,64 PRODUCT - 98.52 87.2 7.22 ORE 61.42 75.2 TAILINGS 23.69 CLEANER CONCENTRATE 98.69 87.5 4.38 DRnntlr:T 98.54 87.2 7.10 74.0 mAGNESITE (%) 89.15 88.92 2:5.32 .64 22.10 .71 21.30 .71 21.11 .59 21.41 .• 61 90.10 90.84 . 90.01 91.22 90.66 I , 14: JU , 15:00 -- r Prote cted Document Subject to Protective Order 91.29 89.92 90.01 89.62 91.59 21.37 .57 J NJ MX68_000005004 ,. "\ Table 2 ,Continued. " SAIIIPlE DESIGNATION TIlliE, ACID INSOLUBlES (%) 15:30 COLOR REfLECTANCE pH BUI,.K DENSITY (lb./ft:' -325 m SCREEN (%) (%) 75.2 89.75 ORE 62.63 TAILINGS 22.38 CLEANER OJNCENTRATE 98.86 87.9 4.38 PRODUCT 98.66 87.5 6.92 90.37 21.56 IIIAGNESIl (%) .53 ORE TAILINGS CLEANER CONCENTRATE' PRODUCT ; ORE TAILINGS CLEANER CONCENTRATE , ' PRODUCT . ORE TAILINGS I I I CLEANER CONCENTRATE PRODUCT ORE " r TAILINGS " CLEANER CONCENTRATE PRODUCT , ORE TAILINGS CLEANER CONCENTRATE' ---- -._Protected Document--Sub'ect I to Protective Order ", J NJ MX68_ 000005005 " > Table • • J LAB 0 RAT OR Y R E PORT Date Produced 1/29/74 Product or Grade __'..... '6.Ll6~IloI.I" _ Ultrawet D.S. floated product Sample No. or Description rINDINCS 1.lli ;02 1;72 .94 86.0 24.46 MOISTURE TOTAL ACID SOLUBLE mAGNESITE (lYIgCO.) COLOR BULK DENSITY COIYIPACTION MAX. VOLUME MIN. VOLUME AVERAGE VOLU/YIE. SPECIfiED N.III.T. 0.15% N.IYI.T.2.0% N.IYI.T. 1.10% WHITE (BY STANDARD) 20.5 to 25.5 Ibs./ft. 146 cc 82 00 114 CC 100.00 100.00 98.66 85.55 SCREENS - 60 - 100 - 200 - 325. 100% N.l.T. 99.7% N.L.T. 98.5% TRACE ELEMENTS ARSENIC HEAVY METALS less WATER SOLUBLE IRON pass test PASS TEST MICROSCOPIC EXAMINATION pass test PASS TEST ."1) : pH 3 J than 10 N.m.T. 2ppm. N.m.T. 10 ppm. • 8.89 r Protected Document--Subject to Protective Order J NJ MX68_000005006 • • Table 4 lAB 0 RAT 0 R Y REP 0 R T Date Produced 1/29/74 Product or Grade _"...Io6.Llo6o&....o1A..'_' Sample No. or Description TEST IYIOISTURE TOTAL ACID SOLUBLE IYIAGNESITE (MgCO.) COLOR BULK DENSITY COMPACTION mAX. VOLUME MIN. VOLumE AVERAGE VOLUIQE SCREENS - 60 - 100 - 200 - 325. _ N-butanol floated product FINDINGS .03 1.12~72 87.0 22.40 SPECIFIED N.lII.T. 0~15% N.IYI.T. 2.0% N.M.T. 1.10% WHITE (BY STANDARD) . 3 20.5 to 25.5 1bs./ft. 130 cc 94 cc 112 cc 100.00 100.00 98.99 91.27 100% N.L.T. 99.7% N.L.T. 98.5% TRACE ELEMENTS ARSENic HEAVY IYlETAlS less than 10 N.m.T. 2ppm. N.m.T. 10 ppm. WATER SOLUBLE IRON pass ·.test PASS TEST MICROSCOPIC EXAMINATION pass test PASS TEST pH ~O7 8.47 r " Protected Document--Subject to Protective Order JNJMX68_000005007 \ • • , Table 5 lAB 0 RAT 0 R Y REP 0 R T Oate Produced Product or Grade 1/29/74 _"....lo6"-ll6"-,,AOi.JC,,-'_'~ _ Sample No. or Description N-butanol.oltrlc aold floated product TEST lYIOISTURE TOTAL ACID SOLUBLE MAGNESITE (MgCO.) COLOR BULK DENSITY COMPACTION MAX. VOLUME MIN. VOLumE AVERAGE VOLU/YIE F"INDINGS .02 1.23 .66 21.64 SPECIfIED N.1YI.T. 0.15% N.M.T. 2.0% N.M.T. 1.10% WHITE (BY STANDARD) 20.5 to 25.5 Ibs./rt. 3 140 cc 100 cc 120 co SCREENS - 60 - 100 100.00 100% 100.00 - 200 .99.15 N.l.T. 99.7% N.l.T. 98.5% - 325 91.97 TRACE ELEMENTS ARSENIC HEAVY mETALS - .17 less than 10· N.IYI.T. 2ppm. N.m.T. 10 ppm. ,I WATER SOLUBLE IRON pass test mICROSCOPIC EXAMINATION pass test pH PASS TEST PASS TEST 7....:.._ 64_._ _ r Protected Document--Subject to Protective Order J NJ MX68_000005008 • • Table 6 COMPARITIVE TALC RECOVERIES DURING REAGENT TRIAL PERIOD Ultrawet D. S. n-butanol - ~ n-butanol citric acid H 67.05 63.54 61.49 T 40.15 26.70 23.95 C 98,08 98.80 98.71 67.93 79.45 80.61 +16.97 +18.67 RECOVERY ~. CHANGE ULTRAWET COLLECTION PERIOD vs. ° ; H=% acid insoluble content of ore T=% 'ac1d insoluble content of tai11ngs C=% acid insoluble content of cleaner concentrate Protected Document--Subject to Protective Order J NJ MX68_000005009 Table 7 _. • OVERSIZE COUNT Number percent particle size distribution 0+ "66 U"-U1trawet D.S, Floated-TalC. ] /29/74 i SIZE (microns) NUMBER STATED SIZE ~.O 4113 10000 2.5 3712 gO 2') 5.0 2431 Sg 11 10 1106 26 Sg 15 556 20 297 7 ?? 30 79 1 g? 40 36 88 50 12 29 60 2 05 MEAN SIZE = 8.62 .: %.GREATER THAN 11 <)? microns Note: t _ Limiting Detection Threshold-= . 2.0 microns f ! Protected Document--Subject to Protective Order JNJMX68_000005010 ~ Figure 1 ~ NUMBER PERCENT PARTICLE SIZE DISTRRIBUTION BY OVERSIZE COUNT OF "66 U"- Ulrawet D,S, Floated Talc filI 1/29/74 '. ;; ~ ~:1. I .. -+;+ . -, . . .. ,,:!'!i, E '"", u:":u: ~ HP. 't·· 11':' ,.,......... ~ 1: .... .."""... • :q::p ~.u Ei :#. ~;:' ~: ="~i ~~~.: ':= ~~ :~ ::~ -. ::::::, ~,..:E O::I .: -: !:ti±t.. .. ' ~~ . ' ~~ 30 !f* -:-1== :x==: 25 ' :To. 15 ,. I -t-i-+: ' , , , , 'I. I II "I ! I: i II II I ! tillil II I' , . • , I ,', " , I; . '11.:1" , (.-I is 10 .' 'II H-i., :,:; .~ '0 IH,," I III ,I I I ,':.,' I • , ~ ',., I i I \ I ;:1' " I , . " 1:1, • I I! : It : Ii :11 .. ,t II iiI I I " jll 1111 I ' I ~ I,' " I' I j ~. .: ~ ! ". ; I , : I il. I. • "'.; I;' I I ' II I • ill! : : . : ',p.' , "" , ," " II , I 1 I l·ii II', I , I II --, ...... :_:~ := c::: : _ .:.~=­ := ,,,: :::- :: -r:-:-+ :.,....:. -__ I I' :11,' ::: :: .. :: 20 !~ ,0 :~~: ~::: ::= . ':: .:::: ._. ,', -;.r.-, ,::' ~ ~:::: ~: 40 :~ . ~ tm ~:+i 1:1;.. l::. ~-i:1- ~:I. :: - ::.;. ~ ~. z:...:-. .:r:: .,~ :::: +i • 'T" :t/.l ':U . :;;; :::- :'.: ~ :-:1. :-.:: I;:; =:::C":t .. ~ :::: I:1i ::ttl ~~: :::: :::: _...:: •• Wi ~. !,4, ~ j:._ ..._~ 1 ' r! ,~ ' ~ , j •• ' I:, , " III I:' ,~, - - .= 9 :..t·::"·' 8 ==-- =:: ~:_ :--' ::-: :;' 7 6 r;- '.... r:-. 4··:·- .- - -= .~ ~. 3 .:~ :~- ~~ - -=~ = ":--"2 -l . : .. ' , 1 " ".,. " " ' , I I I...L..-' .! .,' -:-'- 'l '" ,-i -++-;---,-. 1 ; ,, I '", I " , 1 , ' .. " ,"I I' , " I';: , " 2 3 , , ,,' 'i ": 4 , .,:, . , " , , " , , . ,": , I' '" '" '!;! , ,, ,, , : 1 " " , ; , , I I, " 5 6 7 8 9 10 '" -'- ,': I'!: ", .. ,-:;~~", , " ..,. ,",. " .. .' ,'" ~ ' 40'5060 ~: :: ': ,-.: ,, 00 1( NUMBER PERCENTAGE GREATER THAN STATED PARTICLE SIZE Protected Document--Subject to Protective Order JNJMX68_000005011 , , Table 8 • • OVERSIZE COUNT Number percent particle size distribution 0+ "66 AII- Butanol Floated Talc 1/29/74 SIZE (microns) NUMBER 4399 100.00 2.5 4139 94.08 5.0 2836 64.46 10 1323 -:SO. 07 15 757 17.20 20 401 g.11 30. 126 2.86 40 41 .Q'5 50 14 . '51 60 3 .06 MEAN SIZE = ·9.39 THAN .. microns Limiting Detection Threshold = 2.0 Protected Document--Subject to Protective Order " STATED SIZE .0 ~ Note: % GREATER microns JNJMX68_000005012 ,. \ -. , .. Figure 2 • NUMBER PERCENT PARTICLE SIZE DISTRR~BUTION BY OVERSIZE COUNT OF "66 A"- N-butanol Floated talc 1/29/74 100 ... I mt.ffl ffi, : I 1•• - , .1 :1'::';:'--'- . l...,., 70 60 _' ' fllliTh :9F~ 50 :: =- .1 _.; ::-: :::;;r.l:lt:= * ~t:: 40 . ::=-= :=.. -- ;.;.. H:;:--' ~:~ . ' •• 'g' 30 25 '71 ... " fIl .. 15 I '-" r>::1 N H til -- '; , :. • I"; I;, I! t I." .. • : I ;. I "," ':'., I '1,_' It •• : , I o-J ; , I! I I ,~ 1° I. II' .. t.: 'I ", ... " .. II I' "II "i III' II " I 'II. I 'I " .,. I .,' ,I '.",1'" 1,1' 1· ,;,;:,' .: 1 .t • • ". ", .I' tI, :1. •• Ill' I ;. 'p I tI "I , I. .. fj+ ,~ tl I 0, ." I .:.... ,, ~, ' ,: i I: II iI I. ,.' ., "" . II' t',; : .. r--'-' --~ "', .. ' , 9 8 .. - ,. -- 7 6 .• e3 5 0 H E-t " , t 10 ..=-t:: " . H 0 -'~­ =_.,: .::: ._- '= - , .. . . , r.· s:: 0 ta - II = 20 , +-:t I::r=::::: 1::: 4 , . I , • 3 .. ' .. , . '" . ..."", II" 2 ' , .' ., , " • " I' •• , 'I I ! 1·1 I I . I ,. • " '.1 I II "i;; ""j J:E8JtE:E:mffim~[ffilB"tE!'~"m!lffi:1t~m 2 4 1 3 .. I"! NUMBER • 'II !t I. ' :t=: .~... +' . .... ~ , " :j , §'" , , . . o. I' I I ' • ,., •• l' 1 •• " .• " , I '1:, ,.; . . . ', ,'" I, •• 40'50'60 5 6 7 8910 THAN ~ t •• '0 I: I " -- - 'I~:=: ~ I •.• •••• to • • I '" t , o ; Iii! .., : - , .' ,. ,, . PERCENTAGE GREATER Protected Document--Subject to Protective Order .. . :,1":" " II . . --':: , ,I",:: 1.1 , . ....,, 001 STATED PARTICLE' SIZE JNJMX68_000005013 , ,, . , Table 9 • • OVERSIZE COUNT Number percent particle size distribution 0+ "66 AC"- Butanol,Citr-ic ·Acid Floated Talc 1/29/74 SIZE (microns) NUMBER % GREATER THAN STATED SIZE '1.0 4035 100.00 2.5 4003 g9.20 5.0 3105 76 glj 10 1632 40.44 15 86":5 21.38 20 513 12.71 30 . 160 3.96 40 53 1.31 50 12 .29 60 8 19 MEAN SiZE = 11.08 microns Note: Limiting Detection Threshold = 2.0 microns Protected Document--Subject to Protective Order JNJMX68_000005014 . I , Figure J • . _ _, • NUMBER PERCENT PARTICLE SIZE DISTRRIBUTION BY OVERSIZE COUNT OF "66 AC"- N-butanol,Citrl0 Acid Floated talo' 1/29/74 , , ( .:. ~~ .. ~." 1:1: ,. .,.fJ : _~-=: , .. ~_. .. mYl . 1.P:'l ' ~ l lr.u <" gx ..I .. J -' 'i i' t ~ ,~ .~ 1 1 3 2 4 5 7 8 9 10 l) 40 .;~ W,{ I " sow ~I$"l l' . I. 80 I I I I' 10 DIAMETER (MICRONS) EQUIVALENT SPERiCAL pARTICLE '. Protected Document--Subject to Protective Order JNJMX68_000005017 ~ o It n Figure "" . Ii ~':.- It C- O n o 5 I I .1 l: .__ ~ I 3 \";1.~I~' 1'1 iii II I III ::!. I in 1111111111111 l: l-H+If+t+I4+l-H+lH+I++-!H+-H-f-H-H-+t+H-tHB'Tldl , •• .E I I III !:l. Ci I ! "o It • I !:l. <. III o a. ~ 1 I f.Y+tllllllllllll'NJ III III I I I I I I 11I III IIII1 II I I I I 1I I I I I III ~: Ilin ni 1111111111111111111 III I I I" I I I I I 1111111111 II I I I I I I I I 1IIlIIIIIIIIIIIIIIIIIIIIIIIIIN 111111111111111111111" I'.;;;; "., ill ~ r c... zc... s: 0 ~ ~ ·lD >< en 0 0 0 0 0 co CI ~ ito to :fa 10 ~ §. , ~ ~ 4 1 .Equivalent Spherical Particle Diameter (Microns) co 1 '"~ ,. . . ' • •,. " ~ HI .. 0 .... ·O:J N:JDZJ,:JIO :IN:JDn:J OoI:JNI llI:1d SNOISIA'O 01 X Sll'::I...::I e :JII'fOolJ,ltl"'DO'-II'l:lS t1:1dYd OldY tiD NllDZilIID 01 Z:,-O.£ ·ON 2 (~ , I • '. , Table 11 • Weight percent particle size distribution by Andreasen Sedimentation Pipette of Butanol Floated Grade -66A" Production Talc 1/29/74 Time (min. ) Heirht (cm wt. (mg) 2 20.50 20.08 19.66 19.24 18.82 18.40· 17.98 88.6 73.9 61.8 23.6 14.7 11 • 7 9.1 4 6 30 60 90 130 Equivalent spherical diameter(microns) 43.0 30.1 24.3 10.8 7.5 6.1 5.0 Particle Size in Microns (Equivalent Spherical Diameter) Less Than 43.0 30.1 24.3 Greater Than 43.0 ~O.1 24.3 10.8 7.5 10.8 7.5 6.1 6.1 5.0 5.0 Percent less than stated size 86.6 71. 9 59.8 21. 6 12.7 9.7 7.1 Percent by weight '. 13.4 14.7 12.1 J8.2 .8'.9 J.O 2.6 7.1 ,. Protected Document--Subject to Protective Order ., JNJMX68_000005019 • Figure 6 • PARTICLE SIZE DISTRIBUTION BY ANDREASEN PIPETTE OF BUTANOL FLOATED GRADE "G6A" 'PRODUCTION TALC 1/29/74 ! I I / 10 9 8 7 6 5 o u ~4 01 01 W ~ ~3 ... ::I w :< :lijj " I . I Ill' 1 1 5 2 8 9 10 40 5060 80 10 EQUIVALENT SPERICAL PARTICLE DIAMETER (MICRONS) .j Protected Document--Subject to Protective Order .' J NJ MX68_000005020 "'0 o It n It a.-f' Figure 0':..- 7 o n 111I11111111111111I11111111111111111_IIIIII-l~!-!-4111111 I l: 3 III :::l ';'" in l: ~ ~ 6" "'0 o It n ~ III ~ ~ ltHttHl11111111111111111 II I , I I I I I I I II1I1I11 II II I I I I I I 1 I I 1-IHH-l-lH-H+Hl+H-l+H I I I I I I I I I I I I I I IIIIII1I II I H-l H-H+H-J-I-H+H-/-I-H+! III1II IIII I 1 1-' J I I I H+H+t+1 I I I I I I I fI I I I I ! 1- litimitiitltlltii III LI LLll=tHtl. L1±U±I±l±f±tttttttitttt: c... Z c... s: >< en l co o o o o o o '" ~ o Cl CD l' III 50 2'0 30 Eq~ivalent 10 ~ § , ~ 4 ~ Spherical Particle Diameter (Microns) ' .. "g 'n H:JNI Jr' 10"''' ~:Jd SNOIS'J\IO 01 x 63':JA:J :l1~'H.LI~VOO' •..·05 'z; , , • Table 12 • Weight percent particle size distribution by Andreasen Sedimentation Pipette of Butanol-C1 trio Floated Grade "$6AC" Production Talc 1/2174 Time (min. ) 2 4 6 30: 60 90 130 Heirt (cm wt. (mg) 20.50 20.08 19.66 .19.24 18.82 18.40· 17.98 90.7 77.9 63.2 26.1 16.9 12.9 10.1 Equivalent spherical diameter(micr 9ns ) .43.0 30.1 24.3 10.8 7 .. 5 6.1. 5.0 Particle Size in Microns (Equivalent Spherical Diameter) Less Than 43.0 30.1 24.3 10.8 7.5 6.1 5.0 Greater Than 43.0 30.1 24.3 10.8 7.5 6.1 5 .. 0 Percent less than stated size 88.7 75.9 61.2 24.1 14.9 19.9 .1 Percent by weight 11.3 12.8 14.7 37.1 _9.2 4.0 2.8 8.1 Protected Document--Subject to Protective Order J NJ MX68_000005022 , , • Figure 8 • PARTICLE SIZE DISTRIBUTION BY ANDREASEN PIPETTE OF BUTANOL-CITRIC FLOATED GRADE "66AC" PRODUCTION TALC 1/29/74 10 0 -r""':""-:-:""':""':","':"~-::-:~"':~i~'~:~~-:~"':"~"':"~ ':"~'" '~:"",'" '::7:'""';:'-:'""':;T:"",,"';7;;7; r.e-:-:-"77:,,"~ '" '~ 7~"r:7~,"",~~r..':..':T.':.".':".r."'.::,,::'.....7.."'..:-r.!;,;~~-:~T;:-:~~g;-r·=~"'~~f~-:L=:."'::::'·:::"':":~"l~:-:~"'~~;r-:f~:f. ..;::~:::~:;~.,.; ..: ,:,:":_~'1:. "';.':":~:-: "i~:-:;'"1~:r.:ii"g~~:;~,:-:;~r~"'~"'i~."':j::'· r: ~"':"'1': '~ ':'1; r:,'.-:..~n"'~;'Ii ';i";;'I!::q::~~T.-::t7i-::;:::~r'::1 r::!:':r,".7.".'."."l ;Ci: ~~-11~!..;...;.'_.. .;:. .;:~.;.'_.;..I_~~~~;;.;....;.;.+~~r.-';" ;'''+~+':'':':t~';'::~'~: ~: ~i:+-.;.·-.:. · :-"'+:..;:.;.::.:..:r..-:-.::-...+~;~j~~f:~-+. ;:~ :-.: :.: =-: :7: ~ · ~: : :·: t~: r~f;"r:;~: ·.:l" ": ·:-: ~tj: j=t±7;r.~: :·l~: ~:-: ~:-5:-:'i1-:1;r ; : ~·~:~f~;:7-~ :t:'~:~;,~:~ ~ :-'t't !':-: : : ':~"':~t: -:-~"': 'ri; r.;~ ;:7it~ ;~:7~l:'~: ~:i~ : :'~: ~ : ;"':~·t·: -~:~'·:~·:-r.:-: -t·";' ': 1 .. !.':.:: :.:: :::::::!; ..;.... j:: i :~:.;": .~~- ~~i:'l n!~ :~i;.~~~~ ~Jb:t!j:ji !J~-H~n ~n!!J)~~1: -~fl! :11: i!~! ~i!j il~! ~iii 'h:U q:: 70-1:-:--_'-::"-_l.!;':-:;.:.;.:::":;":.r':';.:J;~;.:.;:. :!:.:.!:. :~;.;.:~! ':':~:':';:":~ :;~i:":~ +.:'~ ':'!~:':~ :. J;.~_":_':.'.:':,f-:i.:._:. :.t:':,:.:. .j~l+: ':': .f.':"~ ':'~·:':i: ':f_~:";:r:':'_tJ':" r.;":Y:':~1H. .:.~';';H'1f-~':'~;':;:-': :' :; W: :;_' :·i:':i':k;: ~;:!+_;: .fit~;:ffiE;:. :;: ;:-;:~ _~ i~.;.-~rl: ifH;: i~ 'j';'t~:.:J,:';~ f-~;':;i:3!i~U!;'~:f; .J-i-:B: r: t ~.~:!:;:+r~i~i;:;~ ':7·~t.~ii':7.L"i~~~~n::1r~:,~;~.~r.~::~i:i;r.X:i:'f:i·~':i~t_-:-j.f .~:-:'.i+:-i·~:J:7!t.f: -i,:-j~ J 60-,-:--.-----L...:...:...;......:.;.~.+.:...:....:..;.....:..:j..:.... ;..;...;..;....-F.:.:.".:.:'-1:f-...:....;::.j:I.:.::;...+.:..,,+~.:...4~+-.;.;.f- .;...:...:..t:~.;~.;.H+-~:.;:!.;j;f-~.:.:_,,;j~'3-i-:;;,;..~:-:;:"':,..-::-;:=!-::_.,.:.t.:.=-:.;.;.r-f::i-:.~;,;~;,,~~~..,.~r~"'T±E:-;.~:'!I!:i':-:r.-~;.,;~.,.;.,.~;,;.!::t:+;_~~,;,;:+~:t".1~,.;:;".;h::::,.,;~:f-.-:.,.._.,..,.::~:r".,::,.j:;::-;~c::::--'.:t. .,.:,.!.~:-:;+.-:-:...,...,•.,..rl .. 30 25 20 :1::. ;.'.:;, . .. -;.~ . ...•. ~ ~.l"': •.1.1 Ill' t-;r :!l1 ;;!-7 10 9 8 7 6 5 ~2 X· ';-; :::t-4 tit: :; Wi' , 'ttii H-H. r~:; IJ-UJ. l~ 1.. J.L iTIoi :ttrtt L!J...L; th'1 .,.,:lH-l, ml1 IT -iT 'i1tt; :II; :tT ,7;11 ~; 'rr II ' II imflli': I , ....... I. Ii '1<; I 1 1 '2 3 4 5 6 7 8 9 10 ~Tj: ~ i1 ;rrrr 40 'rr 5000 m-t ; 'I I I , I III \ II' ~rT! \': 80 10 EQUIVALENT SPERICAL PARTICLE DIAMETER (MICRONS) ;. i i ! i Protected Document--Subject to Protective Order .·1 J NJ MX68_000005023 Iff! {I I', U-LI:: I I I I I 2...LL~' L [ . I \ I Z III !l 0 III 0( l> 0 r- , 0 'U"lUl~ "",10 , ! 0"'0 r-_ 0°'" -Cl-1 <>N !:iXlQ --'" °iz r". II) s:: ~!Cl -:l: 0 1-4 ,,0> '"::> ":t () •.-1 1) ::8 nZ > ":l:n '-" :t 1-4 (l) .IJ Q) E ~ •.-1 0 Q) ~ .....() .u 1-4 Ci1 ~ '"cCl ~ Cil M 'Z .....() :0 ~'" 1-4 :r; Q) ~ c .... t/) "z 0.- "N ~Cl .n n JJ lJ ~ Q) ~ Cil .....:> ::l 0" W , ", Protected Document--Subject to Protective Order J NJ MX68_000005024 Table 13 • • AMPHIBOLE CONTENT OF REAGENT TRIAL PROCESS SAMPLES .. Sample des1gnat1on Amph1bole level (ppm) A ore 300() A product 100-200 ·B ore 3000 B product 100-200 -C ore 3000 C ·product 100-200 -,-- LEGEND: Ul~awe~ D.S. tr1al period B0 N-butanol trial period C~ N-butano~c1tr1c acid trial period A~ , , ., Protected Document--Subject to Protective Order J NJ MX68_000005025 • • Table 14 Relative amounts of chlorite, dolomite, and magnesite with respect to talc Chlorite/Talc Dolomite/Talc Magnesite/Talc ORE A 2 7.0 x 10- 0.12 0.27 ORE B 2 8.6 x 10- 0.11 0.23 ORE c 7.4 x 10- 2 0.11 0.25 PRODUCT A 10 PRODUCT B 8.6 X PRODUCT C 8.5 X 10- 3 X very small very small 10- 3 very small very small 10- 3 very small very small TAILS A 0.28 0.78 1.2 TAILS B 2.6 5.7 11 TAILS C 2.4 6.0 12 \ \ " I LEGEND: A- Ultrawet D.S. trial period B- N-butanol trial period 'C- N-butanol-citric acid trial period r- Protected Document--Subject to Protective Order J NJ MX68_000005026 "'0 o It n It Figure 10 X-RAY DIFFRACTION PATTERNS OF REAGENT TRIAL TALC PROCESS SAMPLES C- O o n l: 3 A- Ultrawet D.S. trial period n-butanol trial period ~-butanol trial period III ::!. B- in CTDM- c- l: .E III !:lei • "'0 o It !:l- OFF 4i SCALE .. <' o III chlorite talc dolomite magnesite M, T a. ~ • PRODUCT ORE' C III \\ T, • M'"\ IT 1\ M - C TAt.LS D, c T \ III 11\ T A JllIl .B.. Ac... Z c... s: >< en I .24 , I , , I 34 I '" ....IV , 24 co 1 0 o o o o o ' 02 e , , 1 34 CU Ka. I 24 ........ ,r , , , J 34 • • Figure 11 PHOTOMICROGRAPHY OF "66 U"- Ultrawet D.S. Floated Product .. '.~ ·1 ,~ - - - : " ~ -~-------.. --- ._---- --------,-- -_. - -~~--_ .... -------------- " -----_._- .... _- ----~----- I iJ" - --'-t -~:' ~- ~.. r " . :",:'~ ' , . -'1'. .... "..d •. , . .' M&gnlflcatlon-l00X J NJ MX68_000005028 Protected Document--Subject to Protective Order Figure 12 •• • • PHOTOMICROGRAPHY OF "66 A"- N-butanol Floated Product . ." m '"... Magnifloatlan- 100X ~\ Protected Document--Subject to Protective Order J NJ MX68_000005029 Figure 13 • • PHOT.OMICROGRAPHY OF "66AC"- N-butanol Floated Produot .. _._---------------_._-_._--_..... _-----~-- -- I ." Magnification- 100X Protected Document--Subject to Protective Order J NJ MX68_000005030 Table 15 • • ASBESTIFORM FIBER COUNTS BY WALTER C. MC CRONE ASSOCIATES Sample designation Fiber count per E.M. gr1d F1ber identification 66-U-Ore 0 66-U-Product 1 Probably chrysotile 66-A-Ore 1 Probably chrystile 66-A-Product 0 66-AC-Ore 8 Chrysotile. 66-AC-Product 1 Chrysot1le , '. LEGEND: 66-u- T1m~ ~eriod using Ultrawet D.S. 66-A- Time period using n-butanol 66-AC- Time period using n-butanol-ci~rl0 acld Protected Document--Subject to Protective Order J NJ MX68_000005031 • • ATTACHMENT B ASBESTIFORM DEPRESSION THROUGH THE USE OF NEW FLOATATION REAGENT SYSTEMS -1- Protected Document--Subject to Protective Order J NJ MX68_000005032 , • , • INTRODUCTION: A study was performed at Windsor Minerals to quantify the effectiveness of two new floatation reagent systems in the depression of asbestiform minerals in the floatation process. Analysis of the floated products was accomplished using a Millipore l1MC Image 'An8lyzeras the analytical detection device. CONCLUSIONS: 1. A combination of n-butyl alcohol as a frother along with citric acid as a depressive agent proved to be 20 times as effective as Ultrawet D.S. suppressing asbestiforms in the final product. 2. Using only n-butyl alcohol as a frother proved to be 7 times as effective as Ultrawet D.S. in suppressing asbestiforms. 3. Ultrawet D.S. provided only a minimal suppression of asbestiforms through the floatation process. EXPERIMENTAL: Ground ore from the Hammondsville Mine was "doped" with 1.0% by weight of the'fibrous form of anthophylite which occurs as a rare.mineral in the Hammondsville ore~ody, and suojected to a series of laboratory floatations using the following reagent systems: 1. Ultrawet D.S. 2. n-butyl alcohol 3. n-butyl alcohol-citric acid. The products obtained from these laboratory floatations were scanned on a video monitor coupted to an optica~ microscope, the system having a useful magnification of SOOX.· Clearly recognizable asbestiform anthophylite was counted and totalized over 100 viewed fields. The number of particles viewed in the 100 fields were totalized by means of a complementary computer interfaced to the system. The numbers obtained by this technique were compared to-those obtained by an identical analysis of a standard preparation consisting of a Grade "66" product·'''dopedl l wi.th 2.0% by weight of fibrous anthophylite. RESULtS: -.~able 1 gives the data and calculated numerical relationships devised to indicate the effectiveness of the new reagent systems in the depression of fibrous anthophylite. These relationships, their value and definitions are as follows: -2- Protected Document--Subject to Protective Order J NJ MX68_000005033 • " 1. • Rejection factor: a relationship derived to indicate the weight rejection of anphophylite using a given reagent system. This relationship is arrived at by comparing the anthophylite weight percentage in the floated product to the 2.0% asbestifonn "doped" product which represents a floated material having undergone no rejection of asbestiforms from the ore to the product. The Rejection Factor is'defined in these experiments for a given floatation reagent as:' __~-=2~.~0~~__~-r~ anthophylite weight percentage in floated product 2. Rejection Ratio - This term relates the effectiveness of suppression of asbestiforms by the alcohol based systems, to the existing Ultrawet D.5. system and is defined as follows: Rejection Ratio = Rejection Factor of new reagent syste~ Rejection Factor of Ultrawet D.5. system -3- Protected Document--Subject to Protective Order J NJ MX68_000005034 • Table I • Analysis of Cosmetic Grade Tales Using lIMC Image Analyzer. Asbestifo~ Ultrawet D.S. N-Butyl 2.0% Alcohol Asbestiform Floated Product Floated Containing Product Product Total Fields Counted N-Butyl Alcohol Citric Acid Floated Product ·100 100 100 100 298 37 6 2 10681 9166 11416 10103 Weight Percentage Asbestiform 2.00 .2894 .0377 .0142 Rejection Factor 1.00 6.91 53.08 140.94 1.00 . 7.68 20.39 Total Fibers Counted Total Particles Counted Rejection Ratio ,.r -4- Protected Document--Subject to Protective Order J NJ MX68_000005035 • . ", • SUMMARY AND REMARKS: The data shows a profound influence of the alcohol based reagent system upon the amounts of asbestiforms reporting in the floated product. It is apparent that the system which includes citric acid is more effective than n-butanol alone. Although the data was accumulated 'for the spe"clflc mineral species, fibrous anthophylite, the same results can be predicted for other fibrous amphibole minerals and chrysotile asbestos found in association with the Hammondsville ore body whose surfaces expose a substantial concentration of magnesium and hydroxl groups as reactive sites. r -5- Protected Document--Subject to Protective Order J NJ MX68_000005036 • - .'' • ", ATTACHMENT C MINEROLOGY OF ORES, PRODUCTS AND MILL TAILS HE DIFFERENT FLOATATION REAGENTS Protected Document--Subject to Protective Order J NJ MX68_000005037 • '. • TO: WINDSOR MINERALS INC., Windsor, Vermont 05089 FROM: R. C. Reynolds, Jr., Department of Earth Sciences Dartmouth College, Hanover, N.H. 03755 SUBJECT: Mineralogy of Ores, Products and Mill Tails Re Different Flotation Reagents INTRODUCTION: A study was made of the mineralogy of talc products and mill tails that were produced by the use of three different f10·tation· schemes. The designations and descriptions used in this report are as follows: F10t~t'ion Designation Agent Ultrawet A Butanol B Butanol + Citric Acid C In addition, studies were made of the ore that produced each of the products and mill tails. TECHNIQUE: Ores, products, and tails were analyzed by x-'ray diffraction methods •. c to 20 " = Copper Ka radiation was used and the region 20.= 24 34° was scanned. This 20 region contains important peaks from talc, chlorite, dolomite and magnesite. of runs are shown on Figure 1. Examples The data in Table 1 was obtained by averaging peak heights from three s~ans of each sample. Protected Document--Subject to Protective Order J NJ MX68_000005038 . • ' • Materials were studied for amphiboles by means of the heavyliquid-benzethonium chloride method described in the Windsor Mineral Report of March, 1974. To improve separation and subsequent semi-quantitative estimation of amphibole, product samples were spiked with dolomite and tourmaline, sized 10-40~, to better simulate the ores, which behave well in the amphibole separation procedure. RESULTS: Figure 1 shows the x-ray,diffraction patterns of ores, products, and tails associated with each of the'flotation procedures. Peaks are labelled C M = magnesite. = chlorite, T = Talc, D = dolomite, and The results clearly show (1) the low chlorite, magnesite, and dolomite in all of the products ,(2) the large amounts of magnesite, dolomite, and chlorite in ores and tails (3) the low concentration of talc in tails Band C Ores A, Band C are similar as are products A, Band C. The only significant difference among the three treatments shows in the tails; those from treatment A (u1trawet) clearly have ~ much large talc content than do the tails from the butanol ',or the butanol-citric acid experiment. r "Table 1 shows data tabulated from repeated (three times) runs similar to those shown on Figure 1. only in a relative sense. The values are meaningful There appear to be no significant differences among ores A, Band C, and products A, Band C. -2Protected Document--Subject to Protective Order J NJ MX68_000005039 • • The major difference is among the tails, where tails A is clearly much richer in talc than tails B or tails C. It is concluded that: (1) The ores used for the three flotation experiments are very similar or identical in mineralogy (2) The products A,B and C are similar except that product Adoes have a slightly higher chlorite content (3) The tails for Band C are similar, but tails A is clearly higher in talc. Hence, the ultrawet flotation agent clearly produced a higher loss of talc to the mill tails than did the butanol or butanolcitric ·acid reagents The results from the amphibole separation are somewhat ambiguous because of the difficulties in obtaining reproduceable eitractions from the products. However, the tourmaline added to products A and B was recovered to within ±10% for each, giving confidence in the efficiency of the separation. Based on optical estimates from these samples, and separations of the three done without tourmaline, it is concluded that,all three products contain essentially similar concentrations of actinolite, and that its absolute concentration lies between 100 and 200 ppm . .CONCLUSIONS: r "As a result of the mineralogical studies reported here, the following are concluded: (1) Ores A, Band C are essentially identical with respect to their concentrations of magnesite, dolomite~ chlorite and actinolite -3Protected Document--Subject to Protective Order J NJ MX68_000005040 '- . \. • • (2) Tails Band C are identical with respect to talc, magnesite, dolomite and chlorite, but tails A is significantly richer in talc (3) Products A, Band C are essentially identical with respect to their concentrations of magnesite, dolomite and actinolite; Product A copta1ns a somewhat larger quantlty of chlorite (4) Amphibole separations from products are difficult to achieve quantitatively, but the addition of carbonate and silicate carriers seems promising in eliminating the difficulties -4- Protected Document--Subject to Protective Order J NJ MX68_000005041 • '" ' TABLE 1 X-RAY DIFFRACTION PEAK RATIOS FROM ORES, PRODUCTS AND TAILS Magnesite/Talc Protected Document--Subject to Protective Order Dolomite/Talc Chlorite/Talc J NJ MX68_000005042 \. c. ..... • .., TABLE 2 ACID INSOLUBLE HEAVY LIQUID RESIDUES FROM PRODUCTS, ORES AND TAILS PPM TOTAL PPM ESTIMATED AMPHIBOLE Ore A 9000 "'3000 Ore B 10,500 "'3000 Ore C 8800 "'3000 Product A 100-200* Product B 100-200* Product C 100-200* Tails A 34,600 too much chlorite Tails B 36,100 too much chlorite Tails C 44,100 too much chlorite *See text Protected Document--Subject to Protective Order J NJ MX68_000005043 ,,a iD n iD c- o o n OFF C' l: 3 ~I SCALE III ::!. M""... T J, l: .E IT III !:lei iI " 0, iD n ~ III o M~ ORE a. PRODUCT ~ TAILS 0" • D C A t: c T T T· f' 1 .kJ1.. • A I , I , , 24 I 34 L 24 02 Figure 1 c... Z c... s: >< en l co g\ o - o • o '" ~'\ .... e I I I I I 34 I ' , , 24 I 34 CU Ka X-ray diffraction traces of ores, products and mill tails. Chlorite = C, .talc ~ T, magnesite = M, and dolomite = D. , --