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公开(公告)号：US4320095A
公开(公告)日：1982-03-16
申请号：US225913
申请日：1981-01-19
摘要： A process for the soda ash digestion of refractory tungsten concentrates is provided, the process comprising forming a slurry of the concentrate in an aqueous solution to which sodium carbonate is added in stages while digesting the slurry in an autoclave at a selected elevated temperature of at least about 180.degree. C. to control the concentration of the sodium carbonate during digestion to provide high extraction yields of the contained WO.sub.3. The total amount of the Na.sub.2 CO.sub.3 added stage-wise to complete the digestion is substantially inversely correlated to the digestion temperature and substantially directly correlated to the Na.sub.2 CO.sub.3 /WO.sub.3 weight ratio such as to effect dissolution of at least about 97%, and generally at least about 98%, of the WO.sub.3 in the concentrate and provide a pregnant liquor containing WO.sub.3, the stage-wise addition of the sodium carbonate being such as to inhibit the dissolution of gangue minerals, such as silica, contained in the concentrate.
摘要翻译： 提供了一种用于对难熔钨精矿进行苏打灰消化的方法，该方法包括在阶段中加入碳酸钠的水溶液中形成浓缩物的浆液，同时在高压釜中以选定的升高的温度至少消化浆料 约180℃以控制消化期间碳酸钠的浓度，以提供含有WO 3的高提取产率。 逐步添加以完成消化的Na 2 CO 3的总量与消化温度基本上成反比，并且与Na 2 CO 3 / WO 3重量比基本上直接相关，例如至少约97％的溶解，并且通常至少约 98％的浓缩物中的WO 3，并提供含有WO 3的怀孕液体，逐步加入碳酸钠以抑制浓缩物中所含的脉石矿物如二氧化硅的溶解。
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2.发明授权Chemical treatment of low-grade wolframite concentrate having high Mo/WO.sub.3 ratio 失效化学处理具有高Mo / WO3比的低等级的白钨矿精矿
公开(公告)号：US4303622A
公开(公告)日：1981-12-01
申请号：US225908
申请日：1981-01-19
摘要： A process is disclosed for recovering tungsten and molybdenum values from tungsten concentrates containing molybdenum in an amount at least about one-twentieth of the amount of contained WO.sub.3. The concentrate, generally a wolframite concentrate, is subjected to dissolution in hot NaOH solution to provide a pregnant liquor or solution containing tungsten and molybdenum values. The solution, after purification, is treated with a sulfide precipitation agent to precipitate MoS.sub.3 and some WS.sub.3 using a stoichiometric excess of a sulfide precipitating agent to produce a filtrate containing tungsten substantially free of molybdenum. The sulfide precipitate is dissolved in dilute NaOH solution and again precipitated using a stoichiometric deficient amount of the sulfide precipitating agent to produce a precipitate of MoS.sub.3 low in tungsten. The foregoing sulfide precipitation steps may be reversed.
摘要翻译： 公开了一种用于从含有至少约含有WO 3的量的约二十分之一的量的含钨钼精矿中回收钨和钼值的方法。 将浓缩物（通常为钨酸盐浓缩物）在热NaOH溶液中溶解以提供含有钨和钼值的怀孕液体或溶液。 纯化后的溶液用硫化物沉淀剂处理以使用化学计量过量的硫化物沉淀剂沉淀MoS 3和一些WS 3，以产生含有基本上不含钼的钨的滤液。 将硫化物沉淀物溶解在稀NaOH溶液中，并使用化学计量不足量的硫化物沉淀剂再次沉淀，以产生低的钨的MoS 3沉淀物。 上述硫化物沉淀步骤可以颠倒。
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公开(公告)号：US4325919A
公开(公告)日：1982-04-20
申请号：US225910
申请日：1981-01-19
CPC分类号： C01G41/00 , C22B34/36 , Y10S423/05
摘要： A continuous process with feedback control is disclosed for the soda ash digestion of tungsten concentrates in which a slurry of the concentrate in an aqueous sodium carbonate solution is digested in an autoclave at a temperature of at least about 180.degree. C. to provide a pregnant solution of WO.sub.3. High dissolution efficiency is maintained during digestion by continuously monitoring the pregnant solution which includes determining the specific gravity and the Na.sub.2 CO.sub.3 concentration of the pregnant liquor from which feedback signals are produced which are used to control the amount of Na.sub.2 CO.sub.3 and H.sub.2 O fed to the slurry in accordance with the digestion conditions predetermined to provide the desired dissolution efficiency.
摘要翻译： 公开了一种具有反馈控制的连续方法，用于苏打灰消除钨精矿，其中浓缩物在碳酸钠水溶液中的浆液在高压釜中在至少约180℃的温度下消化以提供怀孕溶液 的WO3。 在消化期间通过连续监测怀孕溶液来维持高溶解效率，其包括确定产生反馈信号的怀孕液体的比重和Na 2 CO 3浓度，其用于控制按照下列方式供给到浆料中的Na 2 CO 3和H 2 O的量 预定消化条件以提供所需的溶解效率。
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公开(公告)号：US4320096A
公开(公告)日：1982-03-16
申请号：US225905
申请日：1981-01-19
摘要： A process for the soda digestion of mixed wolframite and scheelite concentrates is provided, the process comprising forming a slurry of the mixed wolframite and scheelite concentrates in an aqueous sodium carbonate solution and then digesting the slurry in an autoclave at a temperature of at least about 180.degree. C. During digestion a predetermined amount of sodium hydroxide is added calculated stoichiometrically to react with NaHCO.sub.3 formed as a result of the hydrolysis of FeCO.sub.3 or FeCO.sub.3 and MnCO.sub.3 produced during the digestion of the wolframite and convert it to Na.sub.2 CO.sub.3. The concentration of the Na.sub.2 CO.sub.3 solution is substantially inversely correlated to the digestion temperature and substantially directly correlated to the Na.sub.2 CO.sub.3 /WO.sub.3 weight ratio ranging from about 0.9 to 2 such as to effect dissolution of at least about 95% of the WO.sub.3 in the concentrate and provide a pregnant liquor containing said WO.sub.3.
摘要翻译： 提供了一种用于混合的白钨矿和白钨矿浓缩物的苏打水消解的方法，该方法包括将混合的黑钨矿和白钨矿精矿的浆料形成在碳酸钠水溶液中，然后在高压釜中在至少约180℃的温度下消化浆料 在消化期间，按化学计量计算加入预定量的氢氧化钠，与作为在硫酸镁消化过程中产生的FeCO 3或FeCO 3和MnCO 3的水解产生的NaHCO 3反应并将其转化为Na 2 CO 3反应。 Na 2 CO 3溶液的浓度与消化温度基本上成反比，并且与Na 2 CO 3 / WO 3重量比基本上直接相关，其范围为约0.9至2，例如至少约95％的WO 3在浓缩物中的溶解，并提供 含有WO3的怀孕液体。
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公开(公告)号：US4351808A
公开(公告)日：1982-09-28
申请号：US225914
申请日：1981-01-19
摘要： A process for the soda ash digestion of scheelite concentrates is provided, the process comprising forming a slurry of a scheelite concentrate in an aqueous sodium carbonate solution and then digesting the slurry in an autoclave at an elevated temperature of at least about 180.degree. C. The concentration of the Na.sub.2 CO.sub.3 solution is substantially inversely correlated to the digestion temperature and substantially directly correlated to the Na.sub.2 CO.sub.3 /WO.sub.3 weight ratio such as to effect the selective dissolution of at least about 95% of the WO.sub.3 in the concentrate and provide a pregnant liquor containing WO.sub.3 while inhibiting substantial dissolution of gangue minerals.
摘要翻译： 提供了一种用于白钨矿浓缩物的纯碱消解的方法，该方法包括在碳酸钠水溶液中形成白钨矿浓缩物的浆料，然后在至少约180℃的升高的温度下在高压釜中消化浆料。 Na 2 CO 3溶液的浓度与消化温度基本上成反比，并且与Na 2 CO 3 / WO 3重量比基本上直接相关，例如使浓缩物中至少约95％的WO 3的选择性溶解，并提供含有WO3 同时抑制脉石矿物的大量溶解。
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公开(公告)号：US4313914A
公开(公告)日：1982-02-02
申请号：US225909
申请日：1981-01-19
IPC分类号： C01G41/00
CPC分类号： C01G41/00
摘要： A calcium tungstate concentrate is produced by slurrying an aqueous sodium tungstate liquor with calcium carbonate at about 130.degree. C. to about 200.degree. C. while providing sufficient carbon dioxide overpressure to convert sodium carbonate in the slurry to sodium bicarbonate, wherein the conversion of sodium tungstate to solid calcium tungstate in the slurry is promoted. The carbon dioxide is then stripped from the slurry, causing the sodium bicarbonate to convert to sodium carbonate, and a calcium tungstate concentrate is filtered from the slurry. The invention is useful in upgrading impure calcium tungstate concentrates.
摘要翻译： 通过在约130℃至约200℃下将钨酸钠水溶液与碳酸钙混合制备钨酸钙浓缩物，同时提供足够的二氧化碳超压以将浆料中的碳酸钠转化为碳酸氢钠，其中钠的转化率 促进了钨酸钙与固体钨酸钙的混合。 然后将二氧化碳从浆料中汽提，使碳酸氢钠转化为碳酸钠，并从浆料中过滤钨酸钙浓缩物。 本发明可用于升级不纯的钨酸钙浓缩物。
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公开(公告)号：US4443415A
公开(公告)日：1984-04-17
申请号：US391027
申请日：1982-06-22
CPC分类号： C01G31/00 , C22B23/0415 , C22B34/22 , Y02P10/234
摘要： Vanadium and nickel values are selectively recovered from a petroleum coke residue by slurrying the coke in an aqueous solution of sodium carbonate providing an excess of the stoichiometric amount of sodium for formation of sodium vanadate and sodium sulfate, and then digesting the slurry at moderately elevated temperature in a pressurized autoclave under an oxygen overpressure supplying at least the stoichiometric amount of oxygen based on the vanadium and sulfur content of the slurry and advantageously sufficient additional oxygen to provide the thermal requirements of the digestion step by oxidation of carbon. In a continuous embodiment, the feed slurry temperature and feed solids content are adjusted according to a substantially inversely correlated relationship. The digestion temperature for a given total pressure and gas flow rate in the autoclave is adjusted to generate a pregnant liquor containing about 20 gpl to about 100 gpl of vanadate (V.sub.2 O.sub.5) from which at least about 50% of the input water has been converted to steam during the digestion. The vanadate liquor is separated from the digestion residue, which is then sequentially selectively leached for recovery therefrom of nickel and residual vanadium values.
摘要翻译： 通过将焦炭在碳酸钠水溶液中浆化，提供过量的化学计量的钠以形成钒酸钠和硫酸钠，然后在适度升高的温度下消化浆料，从石油焦炭残渣中选择性回收钒和镍的值 在加压高压釜中，在氧气超压下，基于浆料的钒和硫含量至少提供化学计量的氧气，并且有利地具有足够的额外的氧气，以通过氧化碳来提供消化步骤的热需求。 在连续的实施方案中，根据基本上相反的关系来调整进料浆料温度和进料固体含量。 调节高压釜中给定的总压力和气体流速的消化温度以产生含有约20gp1至约100gp1钒酸盐（V2O5）的怀孕液体，至少约50％的输入水已转化为 蒸煮消化过程中。 将钒酸盐液体与消化残余物分离，然后依次选择性地浸提以从镍中回收镍和残留的钒值。
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8.发明授权Treatment of sodium tungstate leach liquor containing dissolved silica, phosphorus, and fluorine impurities 失效处理含有溶解二氧化硅，磷和氟杂质的钨酸钠浸出液
公开(公告)号：US4311679A
公开(公告)日：1982-01-19
申请号：US225907
申请日：1981-01-19
IPC分类号： C01G41/00
CPC分类号： C01G41/00
摘要： Basic sodium tungstate leach liquor is treated to reduce the concentration dissolved therein of silica, phosphorus and fluorine impurities in a process which comprises providing a small but effective amount of magnesium in the liquor to maximize removal of silica and phosphorus from solution in the liquor while maintaining the liquor temperature between about 60.degree. C. and about 100.degree. C. and the liquor pH between about 9 and about 11, filtering the liquor, adjusting the liquor pH to between about 6 and about 8 and the liquor temperature to between about 20.degree. C. and about 60.degree. C., and then providing a small but effective amount of aluminum hydroxide in the filtered liquor to maximize removal of fluorine from solution in the liquor while maintaining the liquor temperature between about 20.degree. C. and about 60.degree. C. and the liquor pH between about 6 and about 8.
摘要翻译： 处理基本的钨酸钠浸出液以减少溶解在其中的二氧化硅，磷和氟杂质的浓度，其中包括在液体中提供少量但有效量的镁以最大程度地从液体中的溶液中除去二氧化硅和磷，同时保持 液体温度在约60℃至约100℃之间，液体pH在约9至约11之间，过滤液体，将液体pH调节至约6至约8，液体温度至约20℃ 然后在过滤液中提供少量但有效量的氢氧化铝，以最大程度地从液体中的溶液中除去氟，同时保持液温在约20℃至约60℃之间 并且酒的pH在约6和约8之间。
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公开(公告)号：US4303623A
公开(公告)日：1981-12-01
申请号：US225915
申请日：1981-01-19
摘要： Dissolved molybdenum is removed from sodium tungstate solutions by adding sulfuric acid to lower the pH value of the solution to between about 8 and about 5, adding to the sodium tungstate solution a water-soluble sulfide in an amount of at least 0.5 gram per liter (gpl) in excess of that required to precipitate as sulfides molybdenum and certain other metals, then lowering the pH value of the sodium tungstate solution to between about 4.0 and about 1.5 as rapidly as possible with sulfuric acid in such a way as to precipitate molybdenum trisulfide while minimizing co-precipitation of tungsten.
摘要翻译： 通过加入硫酸将溶解的钼从钨酸钠溶液中除去，将溶液的pH值降低至约8至约5之间，向钨酸钠溶液中加入至少0.5克/升的水溶性硫化物（ gpl）超过硫化物钼和某些其他金属沉淀所需的量，然后使硫酸钠溶液的pH值尽可能快地降低到约4.0和约1.5之间，以使三硫化钼沉淀 同时最小化钨的共沉淀。
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公开(公告)号：US4450144A
公开(公告)日：1984-05-22
申请号：US400539
申请日：1982-07-21
CPC分类号： C22B3/0012 , C01G41/003 , C22B3/0032 , Y02P10/234
摘要： A process for stripping tungsten values from a tungsten-bearing acidic liquid organic phase into a basic aqueous ammoniacal stripping solution comprises mixing the organic phase and the stripping solution with a high-shear mixing device to maximize the pH gradient between the organic phase and the aqueous solution whereby growth of any precipitated ammonium paratungstate crystals is minimized and the dissolution thereof is maximized and to strip the tungsten values from the organic phase into the stripping solution.
摘要翻译： 将钨值从含钨酸性液体有机相中提取到碱性含水氨汽提溶液中的方法包括用高剪切混合装置将有机相和汽提溶液混合，以使有机相和水相之间的pH梯度最大化 任何沉淀的仲钨酸钠晶体的生长被最小化并且其溶解最大化并且将钨值从有机相剥离到剥离溶液中的溶液。
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