Cemented backfilling performance of yellow phosphorus slag

• Published in: International journal of minerals, metallurgy and materials Vol. 17; no. 1; pp. 121 - 126
• Main Authors: Chen, Jia-sheng, Zhao, Bin, Wang, Xin-min, Zhang, Qin-li, Wang, Li
• Format: Journal Article
• Language: English
• Published: Beijing University of Science and Technology Beijing 01.02.2010; Springer Nature B.V; Tongling Chemical Group,Tongling 244100,China%School of Resources and Safety Engineering,Central South University,Changsha 410083,China%College of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,China; School of Resources and Safety Engineering,Central South University,Changsha 410083,China
• Subjects: Backfill; Backfilling; Calcium hydroxide; Ca（OH）2; Cement; Ceramics; Characterization and Evaluation of Materials; Chemical composition; Chemistry and Materials Science; Coagulation; Composites; Corrosion and Coatings; Fly ash; Geological hazards; Glass; Gypsum; Hydration; Lime; Materials Science; Mechanical properties; Metallic Materials; Natural Materials; Phosphorus; Portland cement; Portland cements; Rheological properties; Slag; Slags; Slaked lime; Strength; Surfaces and Interfaces; Thin Films; Tribology; Ultrafines; 初始强度; 水化反应; 波特兰水泥; 物理机械性能; 胶结充填; 黄磷渣; slag; backfilling; cementation; phosphorous; rheological properties
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-010-0121-2

The experiments on the cemented backfilling perfbrmance of yellow phosphorus slag, including physical-mechanical properties, chemical compositions, optimized proportion, and cementation mechanisms, were carried out to make good use of yellow phosphorus slag as well as tackle with environment problems, safety problems, geological hazards, and high-cost issues during mining in Kaiyang Phosphorus Mine Group, Guizhou. The results show that yellow phosphorus slag can be used as the cement substitute for potential coagulation property. Quicklime, hydrated lime, and other alkaline substances can eliminate the high residual phosphorus to improve the initial strength of backfilling body. The recommended proportions （mass ratio） are 1：1 （yellow phosphorus slag：phosphorous gypsum）, 1：4：10 （Portland cement：yellow phosphorus slag：phosphorous gypsum）, and 1：4：10 （ultra fine powder：yellow phosphorus slag：phosphorous gypsum） with 5wt% of hydrated lime addition, 60wt% of solid materials, no fly ash addition, and good rheological properties. The hydration reaction involves hydration stage, solidifying stage, and strength stage with Ca（OH）2 as the activating agent. The reaction rates of yellow phosphorus slag, Portland cement, and ultrafine powder hydration with the increase of microstructure stability and initial strength.