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一、前言以硫化鋅精矿为原料,采用湿法冶炼金属鋅时,原料中常含有少量的鈷,鈷在湿法炼鋅中是最有害的杂质之一,因此在流程中必須經过严格的除鈷净液过程。黄药(C_4H_9OCS_2K)除鈷是湿法炼鋅除鈷的方法之一,采用黄药净化除鈷后所得的滤渣,通常叫作黃酸鈷渣。黄药在除鈷过程中主要反应如下: Cu~(++)+Co~(++)→Cu~++Co~(+++) CoSO_4+2C_4H_9OCS_2K+(C_4H_9OCS_2)_2Cu→K_2SO_4+C_4H_9OCS_2Cu+(C_4H_9OCS_2)_3Co↓沉淀的主要技术条件是在溶液中有Cu~(++)存在,同时又在鋅含量較高(約120克/升)的中性溶液中反应,因此所得的黄酸鈷渣中含有大量的鋅和銅,其中鈷和銅呈黄酸盐,鋅主要呈碱式硫酸鋅及吸附的硫酸鋅溶液形态而存在于渣中。黄酸鈷渣的成分見表1。
First, the preamble To zinc sulfide concentrate as raw material, the use of wet smelting zinc metal, the raw materials often contain a small amount of cobalt, cobalt in wet zinc is one of the most harmful impurities, so in the process must be strictly In addition to the net process of cobalt. Xanthate (C_4H_9OCS_2K) In addition to cobalt is the wet zinc smelting method of cobalt removal, the use of xanthate purification of cobalt residue obtained after the residue, usually called cobalt yellow residue. The main reactions of xanthate during cobalt removal are as follows: Cu ~ (++) + Co ~ (++) → Cu ~ ++ Co ~ (+++) CoSO_4 + 2C_4H_9OCS_2K + (C_4H_9OCS_2) _2Cu → K_2SO_4 + C_4H_9OCS_2Cu + (C_4H_9OCS_2) _3Co ↓ Precipitation is the main technical conditions in the presence of Cu ~ (++) solution, while the higher zinc content (about 120 g / L) neutral solution, the resulting cobaltous acid slag contains Large amounts of zinc and copper, cobalt and copper in which the yellow salt, zinc was mainly alkaline zinc sulfate and adsorption of zinc sulfate solution form and exist in the slag. The composition of cobalt yellow residue is shown in Table 1.