Method for extracting metals from metal-containing materials by
pyrohydrolysis
    1.
    发明授权
    Method for extracting metals from metal-containing materials by pyrohydrolysis 失效
    通过热解法从含金属材料中提取金属的方法

    公开(公告)号:US6030433A

    公开(公告)日:2000-02-29

    申请号:US750342

    申请日:1997-02-05

    摘要: A method for extracting metals from metal-containing materials, especially waste, by pyrohydrolysis. The metal-containing materials which contain at least one or more of the metals from the group consisting of Zn, Cd, Pb, Hg, Cu, Sn (as Sn(0) and Sn(II)), As, Sb, Au, Ag and Bi, are made to react at 700-1100.degree. C., advantageously 800-900.degree. C., with a gas composition which at least comprises 25-45% by volume of water vapor, 0-12% by volume of carbon dioxide, 2-20% by volume of hydrogen chloride, 0-15% by volume of carbon monoxide, the remainder being nitrogen and possibly oxygen. The metals from the above-mentioned group are extracted in the form of volatile metal chlorides. More particularly, metal-containing materials are used which also contain one or more metals from the group consisting of Fe, Cr, Mn, Ni, Mg, Ca, Al, Si, Ti, Co and Zr, this last group of materials being hydrolysed, under the reaction conditions, to give non-volatile metal oxides, or remain, in the oxidic form, or form (2) a non-volatile metal chloride and therefore remain behind in the starting material.

    摘要翻译: PCT No.PCT / NL95 / 00185 Sec。 371日期1997年2月5日 102(e)日期1997年2月5日PCT Filed Jun。1,1995 PCT Pub。 WO95 / 33686 PCT公开号 日期1995年12月14日一种通过热解解从含金属材料,特别是废物中提取金属的方法。 含有Zn,Cd,Pb,Hg,Cu,Sn(Sn(0)和Sn(II))中的至少一种或多种金属的含金属材料,As,Sb,Au, Ag和Bi在700-1100℃(有利地800-900℃)下与气体组合物反应,该组合物至少包含25-45体积%的水蒸汽,0-12体积%的碳 二氧化碳,2-20体积%的氯化氢,0-15体积%的一氧化碳,其余的是氮气和可能的氧气。 来自上述组的金属以挥发性金属氯化物的形式提取。 更具体地,使用含有Fe,Cr,Mn,Ni,Mg,Ca,Al,Si,Ti,Co和Zr的一种或多种金属的含金属材料,最后一组被水解的材料 在反应条件下,得到非挥发性金属氧化物,或保留为氧化形式,或形成(2)非挥发性金属氯化物,因此留在起始原料中。