Copper slag-base low silicon iron tailing filling material and preparation technology thereof

Abstract

The invention belongs to the field of filling cementing material preparation and particularly relates to a copper slag-base low silicon iron tailing filling material. The filling cementing material is prepared from 15-25wt% of copper slag materials, 3-8wt% of cement clinker, 0.3-0.8wt% of sodium hydroxide and 70-80wt% of low silicon iron tailings. The copper slag materials are prepared from 75-80wt% of copper slag, 3-6wt% of lime, 15-18wt% of gypsum and 0.3-0.8wt% of naphthalene water reducer. The filling cement material is prepared through the copper slag and the low silicon iron tailings, the local ecological environment problems and slag waste problems of mines are solved, and manpower and material resources can be greatly saved. The cost is low, the equipment investment is small, the filling effect is good, and the copper slag-base low silicon iron tailing filling material has wide application prospects in the fields of mine backfilling, building materials and others.

Description

technical field [0001] The invention belongs to the field of preparation of filling cementing materials, in particular to a filling cementing material of copper slag-based low-silicon iron tailings. Background technique [0002] The use of metal tailings as mine filling materials has a long history at home and abroad, mainly in the following stages: ① Before the 1950s, waste rock dry filling process; ② In the 1960s, water-sand filling process; ③ 1960s-70s In the 1980s, tailings cemented filling technology; ④After the 1980s and 1990s, new technologies such as paste filling and full tailings cemented filling. The application and research of mining by filling method is relatively early in foreign countries. Canada began to use impact sand as filling material in the 1930s and applied it to the mining filling process. In the late 1940s, it began to use the tailings of the concentrator in the late 1940s. filling for research. At this time, backfill mining, as an auxiliary method...

AI Technical Summary

Problems solved by technology

[0008] The advantages and disadvantages of each filling process are obvious: the tailings particle size of the graded tailings filling should not be less than 37 μm, and its utilization rate is only about 55%; the high-concentration full tailings cemented filling has good mechanical properties, high strength, and a wide range of applications. Rapid; paste pumping cemented filling slurry with high concentration, short setting time, high utilization rate of tailings, less cement consumption, but high infrastructure costs, complex maintenance and management of process equipment, and great technical difficulties