铜镍矿冶炼渣胶凝材料化学激发的试验研究

Experimental Studies on Chemical Activation of Cementitious Materials from Smelting Slag of Copper and Nickel Mine.

作者信息

Wang Lijuan, Wei Yanke, Lv Guocheng, Liao Libing, Zhang Dan

机构信息

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.

Beijing General Research Institute of Mining & Metallurgy, Beijing 110160, China.

出版信息

Materials (Basel). 2019 Jan 18;12(2):303. doi: 10.3390/ma12020303.

DOI:10.3390/ma12020303

PMID:30669374

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6356638/

Abstract

Gellable composite materials (GCM) were prepared from a smelting slag of copper and nickel deposits and cement, and activated using gypsum and chemical activators. The effects of material ratio, dosage of chemical activators, and gypsum on the mechanical properties of GCM were studied. Our results showed that the chemical activators of Na₂SO₄, Na₂SiO₃, NaOH, and Na₂CO₃ could improve the compressive strength of the GCM. Considering the market cost and ease operation, the compressive strength of the GCM could be significantly improved with 2% Na₂SO₄. The experiment results also showed that the compound chemical activator could improve the compressive strength of gelled material. The strength of GCM reaches 41.6 MPa when 2% gypsum and 80% of smelting slags of copper and nickel deposits were used, which met the national standards requirements of GCM. As such, it is expected that a large amount of copper and nickel mining smelting slag could be utilized for the production of cementitious materials.

摘要

可胶凝复合材料（GCM）由铜镍矿床的冶炼矿渣和水泥制备而成，并使用石膏和化学活化剂进行活化。研究了材料比例、化学活化剂用量和石膏对GCM力学性能的影响。我们的结果表明，Na₂SO₄、Na₂SiO₃、NaOH和Na₂CO₃等化学活化剂可以提高GCM的抗压强度。考虑到市场成本和操作简便性，2%的Na₂SO₄可显著提高GCM的抗压强度。实验结果还表明，复合化学活化剂可以提高胶凝材料的抗压强度。当使用2%的石膏和80%的铜镍矿床冶炼矿渣时，GCM的强度达到41.6MPa，符合GCM的国家标准要求。因此，预计大量的铜镍矿开采冶炼矿渣可用于生产胶凝材料。