碱激发电解锰渣制备水泥掺合料

发布时间：2018-05-21 12:32

本文选题：碱激发 + 电解锰渣　；参考：《环境工程学报》2017年03期

【摘要】：电解锰渣是湿法冶炼金属锰的残渣,为降低其对环境的浸出毒性影响并提高其在水泥产品中的掺入量,利用碱激发技术处理电解锰渣制备水泥掺合料是一种可行的方法。主要研究了碱激发剂种类、掺量对电解锰渣的激发效果,并将碱激发电解锰渣用作水泥掺合料与水泥按不同比例混合研究对水泥抗压强度和浸出毒性的影响。结果表明:碱激发电解锰渣活性显著提高,NaOH中Na_2O当量为10%时试件M-SH10的3、7、28 d抗压强度最高,分别为7.15、9.46、10.03 MPa;将此条件下激发的电解锰渣按质量比取15%与85%的水泥混合制得的掺合料其抗压强度较净水泥试件有一定程度的提高;浸出毒性结果显示Cd、Cr、Pb、Ni、Mn和Zn浓度均下降,且低于GB 8978-1996限值。
[Abstract]:Electrolytic manganese slag is the residue of hydrometallurgical manganese smelting. In order to reduce the environmental toxicity and increase the content of electrolytic manganese slag in cement products, it is a feasible method to prepare cement admixture with electrolytic manganese slag by alkali excitation technology. The effect of alkali activator and its amount on the activation of electrolytic manganese slag was studied. The effect of alkali activated electrolytic manganese slag on the compressive strength and leaching toxicity of cement was studied by mixing the cement admixture and cement in different proportion. The results show that the activity of alkaline activated electrolytic manganese slag can significantly increase the compressive strength of the M-SH10 of the sample when the Na_2O equivalent in NaOH is 10, and the compressive strength of the sample is the highest in 28 days. The results of leaching toxicity showed that the compressive strength of the admixtures prepared by mixing 15% and 85% cement under this condition was higher than that of the pure cement specimens, and the leaching toxicity results showed that the concentrations of CdCrCrPbPbPbPbPbNNiMn and Zn were both decreased, and the results of leaching toxicity showed that the compacted strength of the admixtures was lower than that of the pure cement samples. And lower than the limit value of GB 8978-1996.
【作者单位】：重庆大学资源及环境科学学院;重庆大学煤矿灾害动力学与控制国家重点实验室;
【基金】：重庆市科技攻关计划项目(2011AC7110)
【分类号】：TQ172.44;X757

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