硫酸厂排出的含铁50％左右的烧渣，过去仅作为水泥的添加剂，价格低。
The sulfuric acid slag with 50% Fe used to be applied as a cheap additive of cement.
通过烧杯实验、模型实验和生产性试验比较了复合铝铁与硫酸铝对低温低浊水的除浊效果。
Through beaker experiment, model experiment and practical experiment, the purification effects of PAFC and PAC were compared with one another.
采用聚合硫酸铁去除液体三氯化铁中的钙离子，钙去除率几乎可达100%，产品质量较高，而且除钙工艺成本低，流程易于控制。
Using polymeric (ferric) sulfate as remover, calcium removal rate is almost 100%. This process has characteristics of lower cost, easily controlled and not influence on the quality of products.
采用聚合硫酸铁去除液体三氯化铁中的钙离子，钙去除率几乎可达100%，产品质量较高，而且除钙工艺成本低，流程易于控制。
Using polymeric (ferric) sulfate as remover, calcium removal rate is almost 100%. This process has characteristics of lower cost, easily controlled and not influence on the quality of products.
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