铅碱性精炼废渣制取三氧化二锑

研究了脆硫锑铅矿精矿与铅碱性精炼废渣同时浸出制取三氧化二锑的工艺流程,得出了浸出、还原、水解、中和等过程的最优工艺条件.该工艺的技术特点是在浸出过程中,铅碱性精炼锑酸钠渣与脆硫锑铅矿精矿互作氧化剂和还原剂.实验结果表明浸出过程中Sb浸出率为94.56%,Pb入渣率为97.43%,很好地实现了Sb与Pb的分离;浸出液经还原后,冲稀水解率达99.55%;经碱液中和,得到的三氧化二锑颜色呈白色,且其化学成分平均含量中,Sb2 O3为97.69%,As为0.0055%,Pb为0.0034%,As和Pb含量低,在用等离子体法制取超细氧化锑时可作为原料.该工艺具有综合利用程度高、环境污染小、易于实现工业化生产等优点,对于铅碱性精炼废渣的资源化利用,消除因其堆存造成的环境污染,具有十分重要的意义.

Technological process for producing Sb_2O_3 from waste slag containing antimony in basic refining

The technological process for producing Sb 2O 3 through simultaneous leaching of jamesonite concentrate and waste slag produced in the refining of lead was described, the best technological factors of leaching, reducing, hydrolysis and neutralization were also discussed. The technological characteristics are as follows. Jamesonite concentrate and sodium pyroantimoniate slag produced in the refining of lead are used as the reduction agent and oxidation agent in the leaching process. The experimental results showed that the leaching rate of Sb reached at 94.56% and the rate of Pb going into leaching residue was 97.43%, which could solve the separation problem of Sb and Pb. The reduced leaching liquor was hydrolyzed at 99.55%. Sb 4O 5Cl 2 was neutralized by ammonia to produce an antimony trioxide product containing Sb 2O 3 97.69% and As 0.0055% as well as Pb 0.0034%. The product can be used as a raw material of the ultrafine antimony white produced by equivalence ion body technology. This new technology process which causes low environmental pollution, bears high comprehensive utilization and is easy to use in industry production has the great significance to both the renewed utilization of waste slag produced in basic refining of lead and the elimination of environmental pollution from the heaping of these waste slag.