铜渣活化试验研究
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摘要
本文采用熔融还原的方法制备新型胶凝材料用活化铜渣,探索熔融还原条件对铜渣活性的影响,结果表明:经还原熔炼-磁选后,铜渣成分发生变化,进而影响了铜渣活性。优化还原条件为T=1 350℃,炭粉添加量为铜渣质量的24%,氧化钙添加量为铜渣质量的6%,还原焙烧时间75 min。经磁选除铁和碱性激发后,试块抗压强度最大可达8.7 MPa;经过熔融还原,渣中铁含量14%～20%,钙含量7%～9%,硅含量15%～16%时铜渣活性最强。
Activated copper slag can be used to prepare new cementitious materials by means of smelting reduction.The effect of smelting reduction conditions on the activity of copper slag was studied in the paper.The results showed that the composition of copper slag changed after reduction smelting and magnetic separation,and then the activity of copper slag was affected.The optimum reduction conditions were T=1350 ℃,24% carbon powder,6% calcium oxide and 75 min reduction holding time.After removing iron by magnetic separation and alkaline activation,the maximum compressive strength of the test block could reach 8.7 MPa.After smelting reduction,the copper slag had the strongest activity when the iron content was 14% ～20%,the calcium content was 7% ～9%,and the silicon content was 15% ～16%.
Activated copper slag can be used to prepare new cementitious materials by means of smelting reduction.The effect of smelting reduction conditions on the activity of copper slag was studied in the paper.The results showed that the composition of copper slag changed after reduction smelting and magnetic separation,and then the activity of copper slag was affected.The optimum reduction conditions were T=1350 ℃,24% carbon powder,6% calcium oxide and 75 min reduction holding time.After removing iron by magnetic separation and alkaline activation,the maximum compressive strength of the test block could reach 8.7 MPa.After smelting reduction,the copper slag had the strongest activity when the iron content was 14% ～20%,the calcium content was 7% ～9%,and the silicon content was 15% ～16%.
引文
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[2]孙培梅,魏岱金,李洪桂,等.铜渣级浸渣中有价元素分离富集工艺[J].中南大学学报:自然科学版,2005(1):38-43.
[3]徐家振,金哲男,焦万丽.生物法贫化铜熔炼炉渣[J].有色矿冶,2001(1):28-30.
[4]王玉香,赵通林.瓦斯泥物料性质及选别方法的试验研究[J].鞍山钢铁学院报,1995(3):16-21.
[5]杜清枝.炉渣真空贫化的物理化学[J].昆明工学院学报,1995(2):107-110.
[6]周占兴,周春芳.铜渣的新型资源化处理工艺[J].冶金设备,2015(1):51-54,24.
[7]MOURA W A,GONCALVES J P,LIMA M B L.Copper slag was teas a supple mentary cementing material to concrete[J].Journal of Materials Science,2007,42(7):2226.
[8]BARAGANO J R,REY P.The study of a nontraditional pozzolan:copper slags[C]//Proceedings of the 6th International congress on the chemistry of cement.1980.
[9]A·R·玛特维因科.硅酸盐水泥的代用品一活化矿渣[M]//水泥化学会议论文集.中译版.北京:中国建筑出版社,1965.
[10]潘伟才.活化铜矿渣的组成及胶凝特性的研究[J].华南理工大学学报:自然科学版,1993(1):91-99.