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芬兰№70250专利提出了处理含有Pb、Cu、Zn和Ag的硫化精矿,优先提取上述金属的方法。其特点是用H_2SO_4在276—551千帕压力和≤100℃温度下处理精矿。经过处理的精矿被分选为第1剩余部分和第1超精部分;从第1超精部分提取金属铜和锌。第1剩余部分在存在硫化物情况下,与石灰石接触(温度近95℃)石灰石数量大于化学计算法的数值≥10％。在所有硫酸铅转为硫化铅和萃取所有元素硫时,则需要化学计算法的数值;萃取铜和
The Finnish Patent No. 70250 proposes a method for the treatment of sulfurized concentrates containing Pb, Cu, Zn and Ag for the preferential extraction of the above metals. It is characterized by H 2 SO 4 at 276-551 kPa pressure and ≤ 100 ℃ temperature processing concentrate. The treated concentrate is sorted into a first remaining portion and a first superfine portion, and copper and zinc are extracted from the first superfine portion. The first remaining part, in the presence of sulphide, is limestone in contact with (near 95 ° C) limestone in an amount greater than ≧ 10% of the stoichiometric value. When all the lead sulphates are converted to lead sulphide and all the elemental sulfur is extracted, the stoichiometry is required; copper and