论文部分内容阅读
用浮选法从锌浸出渣中回收铅对锌冶炼厂是有很大意义的。在我们的第一阶段研究中,研究了铅矾的可浮性和表面特性。在微量浮选试验中,研究了天然的铅矾和硫化过的铅矾同戊基钾黄药、Aerofloat和Aerophine捕收剂相互作用与捕收剂浓度、硫化钠浓度和pH之间的关系。pH、捕收剂和硫化程度影响铅的浮选回收率。硫化使捕收剂用量降到不硫化时的1/8。在第二阶段研究中,用分批浮选试验研究了用浮选法从锌浸出渣中回收铅的过程。在硫化前用水清洗浸出渣,以除去其中的可溶的组分。在低pH时,除去的锌的量最多。研究了以下不同参数对硫化过程的影响:硫化钠浓度、戊基钾黄药浓度、硅酸钠浓度和pH。硫化钠浓度对铅回收率的影响很大。硫化浸出渣所需要的硫化钠用量为硫化纯铅矾用量的3倍。浸出渣脱泥和粗精矿再精选可以提高精矿铅品位。
The recovery of lead from zinc leach residues by flotation is of great significance to zinc smelters. In our first phase study, we studied the floatability and surface properties of lead-alum. In a trace flotation experiment, the relationship between natural lead and sulphurized lead and potassium pentylxanthate, Aerofloat and Aerophine collectors for collector concentration, sodium sulfide concentration and pH was studied. pH, collector, and degree of cure affect lead flotation recovery. Vulcanization reduces the amount of collector to 1/8 of that which is not vulcanized. In the second phase of the study, batch flotation experiments were used to study the recovery of lead from zinc leaching residues by flotation. The leached residue is washed with water before vulcanization to remove the soluble components therein. At low pH, the amount of zinc removed is greatest. The effects of the following different parameters on the curing process were investigated: sodium sulfide concentration, pentyl potassium xanthate concentration, sodium silicate concentration and pH. The concentration of sodium sulfide has a significant impact on lead recovery. Sulfide leaching residue required for the amount of sodium sulfide for the amount of pure lead 3 times. Leaching residue mud and crude concentrate and then selected can improve the quality of lead concentrate.