Study on Performance Enhancement Process of Tailings-based Foamed Cement Insulation Material
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摘要:
以尾矿为原料制备发泡水泥隔热材料是实现尾矿大宗利用的有效途径，但尾矿的掺入会使发泡水泥隔热材料的综合性能受到影响。针对这一问题，通过对钼尾矿进行机械力活化来提高其火山灰活性，用活化后的尾矿制备发泡水泥隔热材料。通过对样品的抗压强度、抗折强度、导热系数、泡孔结构等进行表征，研究尾矿活性与材料保温隔热性能和力学性能的内在关系。结果表明，发泡水泥的保温隔热性能和力学性能随着尾矿活化指数的提高而增强。将尾矿在220 r/min的转速条件下球磨240 min，钼尾矿活化效果较好，所制发泡水泥隔热材料的综合性能最优。
Abstract:Tailings can be used to make foamed cement insulation materials, which is an efficient means of utilizing tailings in bulk. However, the addition of tailings may have an impact on the overall performance of foamed cement insulation materials. To resolve this problem, mechanical activation of molybdenum tailings improved their volcanic ash activity, and the activated tailings were then used to make foamed cement insulating materials. The compressive strength, flexural strength, thermal conductivity and bubble pore structure of the samples were characterized to investigate the intrinsic relationship between the tailings activity and the thermal and mechanical properties of the material. The results showed that the thermal insulation properties and mechanical properties of foamed cement were enhanced with the increase of tailings activation index. The tailings were ball milled at 220 r/min for 240 min, and the molybdenum tailings activation effect was better, with the best comprehensive performance of the made foamed cement thermal insulation material.
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Key words:
- foamed cement /
- molybdenum tailings /
- mechanical activation
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