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    • 6. 发明授权
    • Two-stage bioleaching of sulphidic material containing arsenic
    • 包含砷的硫化物质的两阶段生物浸出
    • US06461577B1
    • 2002-10-08
    • US09551575
    • 2000-04-18
    • Börje LindströmÅke SandströmJan-Eric Sundkvist
    • Börje LindströmÅke SandströmJan-Eric Sundkvist
    • C22B1100
    • C22B3/18C22B11/08Y02P10/234
    • A method of leaching sulphidic material that contains metals and arsenic under oxidising conditions and with the aid of microorganisms is characterised by mixing the material with an acid aqueous solution to form a pulp, and in that the material is leached in a first leaching stage at a pH of below 2 and at a temperature that ranges from room temperature to about 55° C. in the presence of an active quantity of microorganisms of the mesophilic and/or moderately thermophilic type, wherewith the major part of the arsenic content of the material and possibly also part of its metal content is/are leached-out and the arsenic leached from said material is oxidised successively to a pentavalent state. The remaining leachable metal content of the material is leached-out in a following leaching stage in the presence of an active quantity of an extremely thermophilic micro-organism and at a temperature within the active range of said micro-organism, said temperature being higher than the temperature in the first stage. The pH is suitably raised in the second stage to a level at which the pentavalent arsenic present in solution is caused to transform to a solid state and precipitate-out as a metal-containing arsenate which is separate from the leaching solution together with unleached material in the pulp after termination of the leaching process.
    • 在氧化条件下并借助微生物浸出含有金属和砷的硫化物质的方法的特征在于将该材料与酸性水溶液混合以形成纸浆,并且其中该材料在第一浸出阶段浸出 pH在2以下,在温度范围为室温至55℃的温度下,在活性量的嗜温和/或中度嗜温型微生物的存在下,其中主要部分的砷含量的材料和 也可能将其金属含量的一部分浸出,并且从所述材料中浸出的砷被连续氧化成五价状态。 在活性量极度嗜热的微生物的存在下和在所述微生物的活性范围内的温度下,在随后的浸出阶段中将所述材料的剩余可浸出金属含量浸出,所述温度高于 第一阶段的温度。 将pH值适当地在第二阶段升高到使溶液中存在的五价砷转化为固体状态并作为含金属的砷酸盐沉淀出的水平,所述砷酸盐与浸出液与未浸提的材料一起分离 浸出过程终止后的纸浆。
    • 7. 发明授权
    • Recovery of precious metal and other values from spent compositions/materials
    • 从废弃的组合物/材料中回收贵金属和其他价值
    • US06455018B1
    • 2002-09-24
    • US08441113
    • 1995-05-15
    • Jean-Pierre Cuif
    • Jean-Pierre Cuif
    • C22B1100
    • C22B11/048B01J37/0036B01J38/60C22B3/10C22B11/04Y02P10/214Y02P10/234
    • Precious metal values, e.g., platinum, palladium and rhodium, and, optionally, other valuable elements, e.g., one or more rare earths and cerium in particular, are recovered from a wide variety of compositions of matter and articles of manufacture, for example waste or spent catalysts such as vehicular postcombustion catalysts, by (i) optionally comminuting such composition/article into a finely divided state, (ii) intimately admixing the composition/article with sulfuric acid, (iii) calcining the resulting admixture at a temperature ranging from 150° to 450° C., and (iv) leaching the calcined admixture in an aqueous medium, whether simultaneously or separately, with H+ ions and chloride ions, whereby obtaining (1) a solid residue substantially depleted of such precious metal values and, optionally, of such other elements, and (2) at least one liquid solution comprising such precious metal values and, optionally, such other elements.
    • 贵金属值,例如铂,钯和铑,以及任选的其它有价值的元素,例如一种或多种稀土和铈,特别是从各种各样的物质和制品组成中回收,例如废物 或废催化剂,例如车辆后燃烧催化剂,通过(i)任选地将该组合物/制品粉碎成细碎状态,(ii)将组合物/制品与硫酸充分混合,(iii)在所述混合物的温度范围内煅烧所得混合物, 150℃至450℃,以及(iv)将所煅烧的混合物在水性介质中,与H +离子和氯离子同时或分开地浸出,从而获得(1)基本上不含这种贵金属值的固体残余物, 任选的这些其他元素,和(2)至少一种包含这种贵金属值的液体溶液和任选的这种其它元素。
    • 8. 发明授权
    • Process for increasing recovery of precious metals in an ore processing operation
    • 在矿石加工作业中提高贵金属回收率的方法
    • US06342190B1
    • 2002-01-29
    • US09578976
    • 2000-05-25
    • Brian Cannon DumboltonJohn Howard Dumbolton
    • Brian Cannon DumboltonJohn Howard Dumbolton
    • C22B1100
    • C22B1/00C22B1/04C22B11/02
    • An ore separation process is provided which begins with a specially designed primary grinding mill. The primary grinding mill grinds the ore into a fine powder which is then blown into the primary sizing baghouse which separates the smaller particles from the larger particles. The oversized particles are channeled to the secondary grinding mill where they are ground again and blown to the secondary sizing baghouse. The grinding process is repeated until all the ore is the proper size. Once the ore has been ground to the proper size it is sent to the ore-roasting oven where it is mixed with a precise amount of air where it is flash heated which initiates the process of separating the values from the wastes. From the ore-roasting oven, the heated ore is channeled to the quench chambers where it is cooled very quickly which results in the breaking up of the ore into its constituent components.
    • 提供了一种以专门设计的主磨机开始的矿石分离过程。 初级研磨机将矿石研磨成细粉末,然后将其吹入初级尺寸袋式空间,将较小的颗粒与较大的颗粒分离。 将过大的颗粒引导到二次研磨机,再次将其研磨并吹入二次施胶袋。 重复研磨过程,直到所有的矿石都是适当的尺寸。 一旦将矿石研磨成适当的大小,将其送入焙烧炉,在其中将其与闪蒸加热的精确量的空气混合,从而启动将值与废物分离的过程。 从焙烧炉中,加热的矿石被引导到淬火室,在那里它被非常快速地冷却,这导致矿石分解成其组成成分。