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提出了一种无污染新工艺处理 含铜复杂金精矿，新工艺 的特色是 低压氨 浸出铜然 后硫代硫酸盐提取金（ 无元素硫问题，副产硫酸 铵）适宜 的低 压氨预 浸工 艺条件 为：再磨 粒度 在－ ０ ．０４５ ｍ ｍ的占６ ５ ％ 以上，浸 出温度１２０ ℃，浸 出氧压０ ．５ Ｍ Ｐａ ，氨浓度４ ５ ｇ／ Ｌ氨浸 渣可采 用常规硫 代硫盐浸金方 法方便 地提取金 研究结 果表明， 预处理阶 段铜提 取率在９５ ％ 以 上，后 续金 浸出 中金 的浸出率及 吸附率 分别在９６ ％ 和 ９９ ％ 以上，即 总金回收 率在９５ ％ 以上图 ５ ，表 ４ ，参 ９
A new non-polluting process for copper complex gold concentrate is proposed. The new process is characterized by low pressure ammonia leaching of copper followed by thiosulfate extraction of gold (no elemental sulfur problem, by-product ammonium sulfate) appropriate low pressure ammonia pre-impregnation Process conditions: regrinding particle size at - 0. 045 m m accounted for more than 6 5%, leaching temperature of 120 ℃, leaching oxygen pressure 0. 5 M Pa and ammonia concentration 45 g / L. Ammonia leaching residue can be easily extracted by conventional thiosulfate salt leaching method. The results show that the copper extraction rate is above 95% in the pretreatment stage, Leaching rate and adsorption rate were above 96% and 99%, respectively, that is, the total gold recovery was over 95%. Figure 5, Table 4, and reference 9