文献类型：期刊文献

英文题名：Experimental Study on Lead-Smelting Slag as Paste Filling Cementing Material

作者：Deng, Daiqiang Cao, Guodong Liang, Yihua

第一作者：Deng, Daiqiang;邓代强

通信作者：Cao, GD[1];Liang, YH[2]

机构：[1]Xiangtan Univ, Coll Civil Engn & Mech, Xiangtan 411105, Peoples R China;[2]Guizhou Inst Technol, Coll Min Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Guizhou Ind Dev Res Ctr, Guiyang 550003, Guizhou, Peoples R China

第一机构：Xiangtan Univ, Coll Civil Engn & Mech, Xiangtan 411105, Peoples R China

通信机构：corresponding author), Xiangtan Univ, Coll Civil Engn & Mech, Xiangtan 411105, Peoples R China;corresponding author), Guizhou Inst Technol, Guizhou Ind Dev Res Ctr, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2022

卷号：2022

外文期刊名：GEOFLUIDS

收录：;Scopus(收录号：2-s2.0-85127859754);WOS:【SCI-EXPANDED(收录号:WOS:000783467900002)】；

基金：This work was supported by the NSFC projects of China (51764009), the Guizhou Province Science and Technology Support Plan Project (Grant No. [2018]2836), the Provincial Natural Science Foundation of Hunan (2020JJ5538), the Scientific Research Fund of Hunan Province Education Department (20A475 and 19C1736), and the High-level Talent Gathering Project in Hunan Province (2019RS1059). The authors are grateful for the financial support for this research.

语种：英文

摘要：Under the current pressure of mineral product price and market competition, as well as the tightening of ecological and environmental protection policies, energy saving, emission reduction and cost reduction, and efficiency increase have become inevitable trends. Lead-smelting slag of smelter, as an industrial byproduct, is harmful solid waste to be eliminated. In this research, a series of experiments on substitute for cement were done for filling cost reduction under premise of guaranteeing the filling strength, using PC32.5 cement as reference cementing material. Meanwhile, with Portland cement clinker, water quenching slag of BF ironmaking, and lead-smelting slag of smelter in different ratios, four cementing materials were made and named as cementing material I, cementing material II, cementing material III, and cementing material IV. Then, the above five cementing materials including PC32.5 cement were mixed, respectively, with tailing and water to prepare paste backfill slurry with different binder-tailing ratio and concentration. Backfill block was made and cured at 20 degrees C; their uniaxial compressive strengths in different curing ages were measured. The result shows the strength of backfill test block using cementing material I (cement clinker and water quenching slag) without lead-smelting slag is far higher than that of test block using PC32.5 cement as cementing material. The strength of block with 16% lead-smelting slag increased dramatically, which was higher than the strength of block using PC32.5 as cementing material. However, the strength of test block decreased when the content of lead-smelting slag reached 32% and 40%. The more lead-smelting slag was added, the worse influence on strength of backfill would be. Because of large specific gravity of lead-smelting slag and low content of CaO, the hydration activity of lead-smelting slag is far lower than that of water quenching slag. Therefore, using moderate lead-smelting slag as substitute for cement will lead to increase of backfill strength and decrease filling cost.