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公开(公告)号：US07563421B2
公开(公告)日：2009-07-21
申请号：US11125325
申请日：2005-05-10
IPC分类号： C22D23/00
CPC分类号： C22B23/0461 , C22B15/0093 , C22B23/043 , Y02P10/236
摘要： A hydrometallurgical process based on pressure leaching at elevated temperature for recovering nickel from nickel oxide ores, characterized by a simplified and efficient process as a whole, realizing a simplified leaching stage, reduced neutralizer consumption and precipitate production in the neutralization stage, and efficient use of recycled water.The hydrometallurgical process of the present invention, comprising a leaching stage which stirs the slurried ore in the presence of sulfuric acid at 220 to 280° C. to produce the leached slurry; solid-liquid separation stage which washes the leached slurry in multi-stages to produce the pregnant liquor and leached residue, the former containing nickel and cobalt; neutralization stage which treats the pregnant liquor in the presence of calcium carbonate incorporated to keep the pH level at 4 or less, while suppressing oxidation of the liquor, to produce the neutralization precipitate slurry and mother liquor for nickel recovery, the former containing trivalent iron; and a sulfide precipitation stage which blows hydrogen sulfide gas into the mother liquor to produce the sulfide solution and barren liquor, the former containing nickel and cobalt.
摘要翻译： 一种基于高温压力浸出以从镍氧化物矿石中回收镍的湿法冶金方法，其特征在于简化和有效的方法作为一个整体，实现了简化的浸出阶段，降低了中和剂消耗和沉淀生产在中和阶段，以及有效利用 循环水。 本发明的湿法冶金方法包括浸出阶段，在220-280℃下在硫酸存在下搅拌浆状矿石以产生浸出的浆料; 固液分离阶段，以多阶段洗涤浸出的浆液，生产怀孕液和浸出残渣，前者含镍和钴; 中和阶段，在所含的碳酸钙存在下处理怀孕液体以保持pH值在4以下，同时抑制液体氧化，产生中和沉淀物浆液和母液用于镍回收，前者含有三价铁; 以及硫化氢沉淀阶段，其将硫化氢气体吹入母液中以产生硫化物溶液和贫浆，前者含有镍和钴。
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公开(公告)号：US07018605B2
公开(公告)日：2006-03-28
申请号：US10372635
申请日：2003-02-24
CPC分类号： C02F1/70 , C02F2101/20 , C02F2209/04 , Y10S423/02
摘要： A method of sulfidation removal of zinc using hydrogen sulfide is provided, desirably at a temperature at 60° C. or lower, wherein in a container that is pressurized at 0.1 MPa or less with respect to atmospheric pressure, by making the pH of the solution 1.5 to 4.0, and the concentration of hydrogen sulfide in gas 2 volume % or greater in equilibrium with the hydrogen sulfide dissolved in the solution, the zinc in solution is removed by sulfidation to 1 mg/liter or less.
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公开(公告)号：US20050265910A1
公开(公告)日：2005-12-01
申请号：US11125325
申请日：2005-05-10
CPC分类号： C22B23/0461 , C22B15/0093 , C22B23/043 , Y02P10/236
摘要： A hydrometallurgical process based on pressure leaching at elevated temperature for recovering nickel from nickel oxide ores, characterized by a simplified and efficient process as a whole, realizing a simplified leaching stage, reduced neutralizer consumption and precipitate production in the neutralization stage, and efficient use of recycled water. The hydrometallurgical process of the present invention, comprising a leaching stage which stirs the slurried ore in the presence of sulfuric acid at 220 to 280° C. to produce the leached slurry; solid-liquid separation stage which washes the leached slurry in multi-stages to produce the pregnant liquor and leached residue, the former containing nickel and cobalt; neutralization stage which treats the pregnant liquor in the presence of calcium carbonate incorporated to keep the pH level at 4 or less, while suppressing oxidation of the liquor, to produce the neutralization precipitate slurry and mother liquor for nickel recovery, the former containing trivalent iron; and a sulfide precipitation stage which blows hydrogen sulfide gas into the mother liquor to produce the sulfide solution and barren liquor, the former containing nickel and cobalt.
摘要翻译： 一种基于高温压力浸出以从镍氧化物矿石中回收镍的湿法冶金方法，其特征在于简化和有效的方法作为一个整体，实现了简化的浸出阶段，降低了中和剂消耗和沉淀生产在中和阶段，以及有效利用 循环水。 本发明的湿法冶金方法包括浸出阶段，在220-280℃下在硫酸存在下搅拌浆状矿石以产生浸出的浆料; 固液分离阶段，以多阶段洗涤浸出的浆液，生产怀孕液和浸出残渣，前者含镍和钴; 中和阶段，在所含的碳酸钙存在下处理怀孕液体以保持pH值在4以下，同时抑制液体氧化，产生中和沉淀物浆液和母液用于镍回收，前者含有三价铁; 以及硫化氢沉淀阶段，其将硫化氢气体吹入母液中以产生硫化物溶液和贫浆，前者含有镍和钴。
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公开(公告)号：US6149885A
公开(公告)日：2000-11-21
申请号：US67020
申请日：1998-04-28
申请人： Susumu Makino , Naoyuki Tsuchida , Atsushi Goda , Sunao Kanesaka , Masaki Imamura , Kazuyuki Takaishi , Yoshitomo Ozaki
发明人： Susumu Makino , Naoyuki Tsuchida , Atsushi Goda , Sunao Kanesaka , Masaki Imamura , Kazuyuki Takaishi , Yoshitomo Ozaki
CPC分类号： C22B3/0005 , C22B23/0453 , Y02P10/234
摘要： A method of purifying a crude nickel sulfate solution to give pure nickel sulfate through solvent extraction, in which the impurities such as cobalt, calcium, magnesium, iron, zinc, copper, sodium, ammonia and others to be in the crude solution are removed while, if necessary, effectively recovering cobalt, and for which the amount of a neutralizer to be used is reduced and the cost of treating wastewater is also reduced includes an extraction step of adding an organic acid extractant to a crude nickel sulfate solution to thereby extract nickel into the extractant to give a nickel-loaded organic phase, followed by a scrubbing step of scrubbing the organic phase as obtained in the previous extraction step with a nickel-containing scrub solution to thereby remove sodium and ammonia from the organic phase; and a second purifying step of adding a crude nickel sulfate solution to the nickel-retaining organic phase as obtained in the previous first purifying step so as to exchange the nickel in the organic phase with the impurities except sodium and ammonia existing in the crude nickel sulfate solution added in this step, thereby giving a purified nickel sulfate solution and an organic phase containing impurities; and optionally a third purifying step of recovering nickel from the organic the organic phase containing impurities as obtained in the second purifying step, and a step of recovering a valuable metal, cobalt from the organic phase containing impurities.
摘要翻译： 纯化粗硫酸镍溶液以通过溶剂萃取纯化的硫酸镍的方法，其中除去粗溶液中的杂质如钴，钙，镁，铁，锌，铜，钠，氨等，同时 如果需要，有效地回收钴，并且其中使用的中和剂的量减少，并且处理废水的成本也降低包括将有机酸萃取剂加入到粗硫酸镍溶液中以提取镍的提取步骤 进入萃取剂中以得到负载镍的有机相，然后用含镍洗涤溶液洗涤在先提取步骤中获得的有机相的洗涤步骤，从而从有机相中除去钠和氨; 以及第二纯化步骤，将粗硫酸镍溶液加入到先前的第一纯化步骤中得到的镍保留有机相上，以将有机相中的镍与存在于粗硫酸镍中的钠和氨以外的杂质 在此步骤中加入溶液，从而得到纯化的硫酸镍溶液和含有杂质的有机相; 以及任选的第三纯化步骤，从第二纯化步骤中得到的含有杂质的有机相中回收镍，以及从含有杂质的有机相中回收有价值的金属钴的工序。
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