锰矿浸渣中可溶锰离子的稳定化处理研究  

The stabilizing treatment for the soluble manganese in manganese leaching slag

作　　者：盘俊 谢能银 明宪权 王雨红[1] 粟海锋[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西远辰锰业有限公司,广西桂平537201 [3]中信大锰矿业有限责任公司,广西南宁530028

出　　处：《广西大学学报（自然科学版）》2015年第3期551-557,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：广西科学研究与技术开发计划项目(桂科重1355002-4;桂科攻1355003-4);国家自然科学基金资助项目(51164002)

摘　　要：为了解决日益严重的锰矿浸渣污染问题,采用在锰矿浸渣中添加硅酸钠为固化剂,研究锰矿浸渣中可溶锰离子的稳定化效果。通过正交实验和单因素实验,考察了反应温度、反应时间、液固比、p H值、硅酸钠添加量等因素对可溶锰离子稳定化效果的影响。结果表明:硅酸钠的用量对可溶锰离子稳定化效果的影响最大,较适宜的稳定化条件为:反应温度30℃,反应时间15 min,液固比5∶1,p H值8,硅酸钠用量0.5 g。在此条件下,20.00 g锰矿浸渣中的可溶锰离子固化率达96.80%,通过浸出毒性测试得到滤液中锰残余浓度为0.99 mg/L,完全符合GB8978-96《污水综合排放标准》。In order to solve the increasingly serious pollution of manganese leaching slag, the effect of stabilizing treatment for the soluble manganese ion in manganese leaching slag using sodium sili-cate as curing agent was investigated. The influences of reaction temperature, reaction time, liquid-solid ratio, pH and sodium silicate dosage on the stabilization effects of soluble manganese ions were studied by orthogonal and single-factor experiments. The results showed that the dosage of sodium silicate had a great effect on the stabilizing process. And the optimal conditions could get the curing rate about 96 . 80% with 20. 00 g manganese leaching slag under the conditions of reaction tempera-ture 30 ℃, reaction time 15 min, liquid-solid ratio 5：1, pH 8, sodium silicate dosage 0. 5 g. The toxicity test result showed that the residual concentration of manganese in filtrate was 0. 99 mg/L, it fully meet the requirement of integrated wastewater discharge standard GB8978-96 .

关 键 词：锰矿浸渣 可溶锰 硅酸钠 稳定化处理 

分 类 号：X705[环境科学与工程—环境工程]