DCS control and lime charging improvement in caustic process;

苛化工段DCS控制及石灰加入量的串级控制

In this paper,the possible causes which result in the defects in tanning processwere analysed and remedies for these defects were put forward.

分析研究了形成鞣制工段常见缺陷的可能原因 ,并提出了一些具体的救治方法。

The trial production of SA from pyrite with high arsenic-containing content[w(As)1% or 2% ～ 3%]is introduced,the arsenic is roasted into arsenic oxide whose solubility in acid is lowered with decreasing temperature,and it is removed as solid at purification section.

沸腾焙烧砷变为砷的氧化物,其在稀酸中的溶解度随温度降低而减小,在净化工段砷以固态析出而被除去。