砷锑烟灰NaOH常压碱浸分离砷锑的工艺

铅阳极泥火法处理过程中产生的砷锑烟灰对环境的危害巨大,但其中锑作为有价金属又需要回收利用,因此对砷锑烟灰进行砷锑分离具有实际意义.采用常压碱浸的方式对砷锑烟灰的分离进行了实验研究.首先考察了常压碱浸过程中添加双氧水对砷锑分离的影响,结果发现添加双氧水对砷锑分离的影响不明显,因此后续选择不使用氧化剂进行碱性浸出.其次考察...

Study on separating arsenic and antimony by NaOH alkali leaching of arsenic and antimony soot

The arsenic and antimony soot produced during the fire treatment of lead anode slime is harmful to the environment, but antimony as a valuable metal needs to be recycled. Thus, separating arsenic and antimony soot has practical significance. In this study, the separation of arsenic and antimony soot was studied by alkaline leaching at atmospheric pressure. Firstly, the effect of hydrogen peroxide on separating arsenic and antimony in the atmospheric alkali leaching process was investigated. The results showed that the effect was not so obvious that no oxidizing agent was used in the subsequent alkaline leaching. Secondly, the effects of leaching temperature, NaOH concentration, liquid-solid ratio and leaching time on the separation of arsenic and antimony were investigated. The results showed that under the conditions of 70 ℃, NaOH concentration of 60 g/L, liquid-solid ratio(mL/g) of 4:1, constant stirring speed of 400 r/min, and leaching for 90 min, the leaching rate of arsenic and antimony reached 93.92% and 2.74%, which indicated that this process could achieve the aim of effective separation of arsenic and antimony.