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摘要:
通过实验研究了三氯化铁-淀粉复合絮凝剂的适宜制备条件和絮凝性能。实验结果表明，制备体系的V（改性淀粉溶液）：V（三氯化铁溶液）比例为0.5，制备温度为45 ℃，反应时间为3 h，熟化时间为18 h，制备的絮凝剂絮凝效果较好；利用该絮凝剂处理200 mL的尾矿水，尾矿水pH值为7.0，絮凝剂用量为21.18 kg/t，絮凝剂絮凝时间为60 s，浊度去除率可达98%。红外光谱分析结果表明，三氯化铁和淀粉并不是简单的混合，而是发生了络合反应，增强吸附架桥作用。
Abstract:The suitable preparation conditions and flocculation properties of ferric chloride and starch composite flocculant were studied. The results showed that when the ratio of V (modified starch solution) to V (ferric chloride solution) of the preparation system was 0.5, the preparation temperature was 45 ℃, the reaction time was 3 h, and the ripening time was 18 h, the flocculant prepared had good flocculation effect. When 200 mL tailings water is treated with this flocculant, the pH value of tailings water is 7, the dosage of flocculant is 21.18 kg/t, and the flocculant flocculates for 60 s, the turbidity removal rate can reach 98%. The results of infrared spectrum analysis showed that the ferric chloride and starch were not simply mixed, but condensation polymerization and coordination reaction occurred, which enhanced the adsorption and bridging effect.
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Key words:
- ferric chloride /
- starch /
- preparation conditions /
- flocculation performance
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