铜渣复合硅锰水淬渣后的改质提铁研究
收稿日期: 2022-04-21
网络出版日期: 2023-01-17
基金资助
2021年北方民族大学研究生创新项目(YCX21119);国家自然科学基金(51964001);宁夏回族自治区重点研发项目(2020BCE01001);宁夏自然科学基金(2022AAC03254)
Study on reformation and extracting iron of copper slag and silicon-manganese water quenched slag composites
Received date: 2022-04-21
Online published: 2023-01-17
铜材等金属材料在生产过程中产生的大量水渣、干渣等冶金渣，其综合利用水平较低，成为冶金业高质量绿色发展亟须解决的难点。为有效回收铜渣中的铁元素，将工业铜渣与硅锰水淬渣混合后按一定比例添加氧化钙及氧化锰进行成分改质，利用FactSage对混合渣料中矿物相随温度的变化趋势进行了预测，借助XRD对改质前后渣料中的矿物相变化进行了对比，通过SEM和EDS对改质后混合渣料中主要矿物相的形态、分布和特征进行了表征。实验结果表明：改质后混合渣料中的矿物相以尖晶石相和硅酸盐相为主；碱度提高后，改质样品中的硅酸盐相增多但尖晶石相减少；混合渣料的碱度为1.5时改质效果最好，其铁品位为44%（质量分数）、铁回收率为95%。
郑彬 , 蒋亮 , 韩凤兰 , 马鸿儒 , 祁志宏 , 苏辉 . 铜渣复合硅锰水淬渣后的改质提铁研究[J]. 无机盐工业, 2023 , 55(1) : 136 -143 . DOI: 10.19964/j.issn.1006-4990.2022-0230
A large amount of metallurgical slag such as water slag and dry slag has been produced in the production process of copper and other metal materials，its comprehensive utilization level is low，which is becoming the focus and difficulty to be solved urgently for high-quality green development of metallurgical industry.In order to effectively recover Fe from copper slag，industrial copper slag was mixed with silicon-manganese water quenched slag and modified by adding CaO and MnO in a certain proportion.The trend of mineral phases in the mixed slag with temperature was predicted by FactSage，and the changes of mineral phases in the slag before and after modification were compared by XRD，and the morphology，distribution and characteristics of the main mineral phases in the modified mixed slag were characterized by SEM and EDS.The experimental results showed that the mineral phase in the modified mixed slag was dominated by spinel phase and silicate phase.With the increase of alkalinity，the silicate phase in the modified sample was increased but the spinel phase was decreased.The best modification effect was achieved when the alkalinity of the mixed slag was 1.5，and the mass fraction of its iron grade was 44% and the recovery rate was 95%.
Key words： copper slag; silicon manganese water quenching slag; reformation; spinel; silicate
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