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本文阐述了热酸浸出——低污染沉矾除铁沉矾试剂的选择,分析了实际生产中使用沉矾试剂碳酸氢铵的影响及解决办法。低污染沉矾除铁工艺原理湿法炼锌热酸浸出溶液经过稀释或者中和,在p H为1.0~2.0、温度为90℃以上的条件下,三价铁离子可以与一价阳离子、硫酸根离子反应,生成易于沉淀过滤的黄铁矾,同时产生酸,主要化学反应式如下:A2SO4+3Fe2(SO4)3+12H2O=2AFe3(SO4)2(OH)6↓+6H2SO4(1)随着反应的进行,溶液中的酸会越
This article elaborates the choice of hot acid leaching-low-pollution alum and iron-removing agent, and analyzes the influence and solution of using borax ammonium bicarbonate in the actual production. Low pollution alum alum iron removal process principle Wet zinc smelting hot acid leaching solution after dilution or neutralization, in the p H is 1.0 ~ 2.0, the temperature is above 90 ℃, the ferric ion can be monovalent cation, sulfuric acid The main reaction is as follows: A2SO4 + 3Fe2 (SO4) 3 + 12H2O = 2AFe3 (SO4) 2 (OH) 6 ↓ + 6H2SO4 (1) With the reaction of the root ions, to generate easily sediment filtered ferrovania, As the reaction progresses, the acid in the solution will be more