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1.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：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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公开(公告)号：US4832925A
公开(公告)日：1989-05-23
申请号：US514733
申请日：1983-07-18
申请人： Donald R. Weir , Ian M. Masters , Barry N. Doyle
发明人： Donald R. Weir , Ian M. Masters , Barry N. Doyle
CPC分类号： C22B11/021 , C22B13/02 , C22B19/22 , Y02P10/214 , Y02P10/234
摘要： A process for the recovery of zinc from zinc-containing sulphidic material which also contains iron and from zinc oxide containing material, at least one of the materials containing lead and/or silver values. The process includes leaching zinc-containing sulphidic material and zinc oxide containing material under pressurized 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 the materials of from about 40 to about 100% to produce a residue containing a major proportion of lead and/or silver values and a leach solution containing a major proportion of the zinc and iron. The residue is separated from the leach solution and treated to recover lead and/or silver values. The pH of the solution is then raised to neutralize the acid in an iron removal step to cause precipitation of at least some of the dissolved iron from the leach solution as an iron compound. The precipitated iron compound is separated from the remaining leach solution, and the remaining leach solution is treated to recover zinc.
摘要翻译： 还含有铁和含氧化锌的材料的含锌硫化物材料回收锌的方法，含有铅和/或银的材料中的至少一种材料。 该方法包括在加氢氧化条件下，在约130℃至约170℃的温度范围内，在含硫化学计量过量的硫酸溶液中，将含锌硫化物材料和含氧化锌的物质相对于 材料的锌含量为约40至约100％，以产生含有主要比例的铅和/或银值的残渣和含有主要比例的锌和铁的浸出溶液。 将残余物与浸出溶液分离并处理以回收铅和/或银值。 然后在铁去除步骤中升高溶液的pH以中和酸，以使作为铁化合物的浸出溶液中的至少一些溶解的铁沉淀。 将沉淀的铁化合物与剩余的浸出溶液分离，并处理剩余的浸出溶液以回收锌。
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公开(公告)号：US4093450A
公开(公告)日：1978-06-06
申请号：US796241
申请日：1977-05-12
CPC分类号： B22F9/22 , C22B23/021 , C22B23/0453
摘要： A process for producing ultrafine cobalt powder includes providing an aqueous solution of cobalt ammine carbonate, with the concentration of cobalt ions being in the range of from about 1 to about 20 grams per liter (gpl). The solution is heated to drive off ammonia and carbon dioxide and precipitate ultrafine cobalt oxide. The cobalt oxide precipitate is then separated from the solution and heated in a reducing atmosphere to reduce the cobalt oxide to ultrafine cobalt powder.
摘要翻译： 一种生产超细钴粉末的方法包括提供碳酸钴氨水溶液，钴离子的浓度在约1至约20克/升（gpl）的范围内。 将溶液加热以排出氨和二氧化碳，并沉淀出超细氧化钴。 然后将钴氧化物沉淀物与溶液分离并在还原气氛中加热以将氧化钴还原成超细钴粉末。
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