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公开(公告)号：US5348713A
公开(公告)日：1994-09-20
申请号：US929927
申请日：1992-08-14
CPC分类号： C22B13/045 , C22B11/042 , C22B15/0067 , C22B19/22 , C22B19/30 , C22B7/007 , Y02P10/214 , Y02P10/234 , Y02P10/236
摘要： A process is disclosed for recovering zinc, lead, copper and precious metals from zinc plant residue, said process comprising leaching the residue with return zinc spent electrolyte, neutralizing residual acid and reducing ferric iron in the solution by addition of zinc sulphide concentrate in the presence of a limited quantity of oxygen, flotation of the resulting slurry to separate unreacted zinc sulphide, treatment of flotation tailings with sulphur dioxide and elemental sulphur to further leach iron, zinc and impurity elements and precipitate copper, flotation of the resulting slurry to separate a copper sulphide concentrate, thickening, filtering and washing of the flotation tailings followed by addition of lime and sodium sulphide to activate lead sulphate and flotation of a lead concentrate from the residue. Iron and impurity elements are precipitated from the copper flotation tailings thickener overflow solution by addition of zinc hydroxide sludge, lime and oxygen to produce a high strength, iron free zinc sulphate solution.
摘要翻译： 公开了一种用于从锌植物残渣中回收锌，铅，铜和贵金属的方法，所述方法包括用返回的锌废电解液浸出残余物，通过在存在下加入硫化锌浓缩物中和残留酸和还原三价铁，还原三价铁 的有限量的氧气，所得浆料的浮选以分离未反应的硫化锌，用二氧化硫和元素硫处理浮选尾矿以进一步浸出铁，锌和杂质元素并沉淀铜，将所得浆液浮选分离铜 硫化物浓缩物，增稠，过滤和洗涤浮选尾矿，然后加入石灰和硫化钠以活化硫酸铅并从残余物中浮选铅精矿。 通过加入氢氧化锌污泥，石灰和氧气，从铜浮选尾矿增稠剂溢流溶液中沉淀出铁和杂质元素，产生高强度的无铁硫酸锌溶液。
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公开(公告)号：US4594102A
公开(公告)日：1986-06-10
申请号：US532331
申请日：1983-09-15
IPC分类号： C22B23/00
CPC分类号： C22B23/043 , C22B23/005 , Y02P10/212
摘要： A process for recovering cobalt and nickel values from cobalt and nickel containing sulphidic material also containing iron includes roasting the sulphidic material to produce a calcine containing water soluble cobalt and nickel sulphate, and leaching the calcine in aqueous sulphate solution under oxidizing conditions at an oxygen overpressure in the range of from about 50 kPa to about 1500 kPa and at a temperature in the range of from about 100.degree. to about 180.degree. C. to produce an iron-containing residue and a cobalt and nickel containing solution. The residue is separated from the solution, and cobalt and nickel values are recovered from the solution.
摘要翻译： 还含有铁的钴和镍的硫化物质中回收钴和镍的方法包括焙烧硫化物材料以产生含有水溶性钴和硫酸镍的煅烧物，并在氧气条件下在氧气过压下将煅烧物浸在硫酸水溶液中 在约50kPa至约1500kPa的范围内和在约100至约180℃的温度范围内，以产生含铁残渣和含钴和镍的溶液。 残余物与溶液分离，从溶液中回收钴和镍的值。
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公开(公告)号：US5403571A
公开(公告)日：1995-04-04
申请号：US700149
申请日：1991-04-04
CPC分类号： C01B17/0232 , C01G13/00
摘要： A process for removing mercury or other metal impurities from elemental sulphur contaminated therewith includes mixing such elemental sulphur in a molten state with an aqueous sulphide solution or an aqueous solution of sufficiently high pH which reacts with elemental sulphur and forms a sulphide solution to cause extraction of mercury or other metal contaminants from the elemental sulphur into the aqueous sulphide solutions, and separating the aqueous sulphide solution containing mercury or other metal contaminants from the molten elemental sulphur to provide an elemental sulphur product substantially free from mercury and other metal contaminants.
摘要翻译： PCT No.PCT / CA90 / 00187 Sec。 371日期：1991年4月9日 102（e）日期1991年4月9日PCT Filed 1990年6月5日PCT公布。 WO90 / 15021 PCT出版物 日期1990年12月13日。一种从被污染的元素硫中除去汞或其他金属杂质的方法包括将熔融状态的这种元素硫与硫化氢水溶液或足够高pH的水溶液混合，其与元素硫反应并形成 一种硫化物溶液，用于将汞或其他金属污染物从元素硫提取到硫化氢水溶液中，以及将含有汞或其它金属污染物的硫化氢水溶液与熔融元素硫分离，以提供基本上不含汞的元素硫产物， 其他金属污染物。
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4.发明授权
公开(公告)号：US4545963A
公开(公告)日：1985-10-08
申请号：US536013
申请日：1983-09-26
CPC分类号： C22B19/22 , B03D1/02 , B03D1/06 , C22B13/04 , Y02P10/234
摘要： A process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore which also contains iron comprises subjecting ground ore to a first flotation step to float an initial lead concentrate containing zinc and produce zinc and iron containing tailings. The zinc and iron containing tailings are subjected to a second flotation step to float an initial zinc concentrate containing iron and also produce tailings. The initial zinc concentrate is subjected to a third flotation step to float a further zinc concentrate containing iron and also produce zinc and iron containing tailings. The zinc and iron containing tailings from the third flotation step and at least a lead and zinc containing portion of the initial lead concentrate are leached in a first leach step under oxidizing conditions at a temperature in the range of from about 130.degree. to about 170.degree. C. in aqueous sulphuric acid solution with a stoichiometric excess of sulphuric acid relative to the zinc content of from about 50 to about 150% so as to give a terminal acidity of from about 50 to about 80 g/L to produce a lead-containing residue and a first leach solution containing zinc and iron. The lead containing residue is separated from the first leach solution and the first leach solution is treated with the further zinc concentrate or calcine produced therefrom by roasting to dissolve zinc therefrom and precipitate a substantial amount of dissolved iron, thereby producing an iron containing residue and a second leach solution containing zinc. The iron containing residue is separated from the second leach solution, and the second leach solution is treated to recover zinc.
摘要翻译： 还含有铁和含锌硫化矿石的锌和铅值分别回收还含有铁的方法包括对地矿进行第一浮选步骤以漂浮含有锌的初始含铅浓缩物并产生含锌和铁的尾矿。 对含锌和铁的尾矿进行第二浮选步骤以漂浮含有铁的初始锌精矿并且还产生尾矿。 初始锌精矿经受第三浮选步骤以漂浮含有铁的另外的锌精矿，并且还产生含锌和铁的尾矿。 在氧化条件下，在约130℃至约170℃的温度范围内，将第一浮选步骤中含锌和铁的尾矿以及至少含铅和锌的部分初始浓缩铅浸出， 在相对于锌含量为约50至约150％的化学计量过量硫酸的硫酸水溶液中，以产生约50至约80g / L的终端酸度以产生含铅的 残渣和含锌和铁的第一浸出溶液。 含铅残渣与第一浸出溶液分离，第一浸出溶液用另外的浓缩锌或煅烧物通过焙烧处理，从而溶解锌，并沉淀出大量的溶解铁，从而产生含铁残渣和 含锌的第二浸出溶液。 将含铁残渣与第二浸出溶液分离，并处理第二浸出溶液以回收锌。
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公开(公告)号：US5711929A
公开(公告)日：1998-01-27
申请号：US416013
申请日：1995-04-03
IPC分类号： C01B17/02
CPC分类号： C01B17/0232
摘要： A process for removing mercury from elemental sulphur contaminated therewith by liquid-liquid contact by mixing of the contaminated elemental sulphur in a molten state with an aqueous solution containing sulphide and polysulphide anions for extraction of the mercury contaminant from the elemental sulphur into the aqueous sulphide solution, and separating the aqueous sulphide solution containing mercury contaminant from the molten elemental sulphur to provide an elemental sulphur product substantially free from mercury.
摘要翻译： 通过将熔融状态的被污染的元素硫与含硫化物和多硫化物阴离子的水溶液混合从而从元素硫中提取汞污染物进入硫化氢水溶液中，通过液 - 液接触将污染的元素硫从汞中除去的方法 ，并将含有汞污染物的硫酸水溶液与熔融元素硫分离，以提供基本上不含汞的元素硫产物。
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公开(公告)号：US5380354A
公开(公告)日：1995-01-10
申请号：US237986
申请日：1994-05-04
摘要： A process for recovering zinc and iron from zinc- and iron-containing sulphidic material, which also contains lead and silver, in which the sulphidic material is leached under oxidizing conditions in a two stage countercurrent pressure leach to produce a zinc-containing solution from which zinc can be recovered by conventional means such as electrowinning, followed by a reducing leach to produce a lead- and silver-bearing product containing substantially all of the lead and a substantial portion of the silver present in the zinc-containing sulphidic materials, and a high strength iron bearing solution having the iron in the ferrous state from which substantially pure, saleable or environmentally acceptable iron residue in the form of hematite which contains the majority of the soluble iron present in the zinc-containing sulphidic materials is produced.
摘要翻译： 还含有铅和银的含锌和铁的硫化物材料中的锌和铁的回收方法，其中硫化物质在氧化条件下在两级逆流压力浸出中浸出以产生含锌溶液， 锌可以通过常规方法如电解提取回收，然后还原浸出以产生含锌和含银的产品，其含有基本上所有的铅和大部分存在于含锌硫化物材料中的银，以及 产生铁含量高的含铁溶液，其中含有铁含量大的纯铁，可销售或环境可接受的赤铁矿形式的铁残留物，其含有存在于含锌硫化物材料中的大部分可溶性铁。
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