【摘要】 采用化学氧化-沉淀法处理某Fe²⁺浓度为800 mg/L的高酸度矿山废水，通过研究不同碱性试剂的添加对调节pH和对铁去除效果的影响以及曝气氧化时间、絮凝剂添加量等方面对废水中铁氧化沉淀效率的探究。结果表明：当使用质量分数为20%的石灰乳调节废水pH至8.0,曝气氧化2 h时，废水中铁的去除率达到99.99%,其废水上清液中TFe的残余质量浓度为0.8 mg/L。再向处理后的废水中加入0.5 mL/L质量浓度为0.1%聚丙烯酰胺使含铁沉淀絮凝沉降，过滤沉淀并烘干后得到铁品位约为40%的沉淀渣，可以作为制备聚合硫酸亚铁的原料。再将沉淀渣在管式炉中700℃条件下焙烧30 min得到铁品位约为60%产品，可以作为炼铁的原材料。更多还原

【Abstract】 The chemical oxidation-precipitation method was used to treat a high acidity mine wastewater with Fe²⁺ concentration of 800 mg/L. The effect of the addition of different alkaline reagents on the adjustment of pH and the removal effect of Fe, as well as the aeration and oxidation time and the addition of flocculant on the oxidation and precipitation efficiency of Fe in the wastewater were investigated. The results showed that when the pH of the wastewater was adjusted to 8.0 with 20% mass fraction of lime milk and aeration oxidation for 2 h, the removal rate of Fe in the wastewater reached 99.99% and the residual mass concentration of Fe in the supernatant was 0.8 mg/L. Then 0.5 mL/L of 0.1% polyacrylamide was added to the treated wastewater to flocculate and settle the iron-containing precipitation. After filtering, precipitating and drying, the precipitated residue with an iron grade of about 40% can be used as a raw material for the preparation of polymeric ferrous sulfate. The precipitated slag is then roasted in a tube furnace at 700 ℃ for 30 min to obtain a product with an iron grade of about 60%, which can be used as a raw material for iron making.更多还原