Low-cost solid waste-based cementing material

Abstract

The invention discloses a low-cost solid waste-based cementing material which comprises the following components in parts by weight: 75-85 parts of slag, 8-12 parts of steel slag, 2-4 parts of desulfurized gypsum, 4-6 parts of lime, and 1-3 parts of an exciting agent. In allusion to the characteristic of high sulfur content of the copper tailings, the material design of the cementing material is optimized and combined, the cementing material suitable for cemented filling of the high-sulfur copper tailings is developed, the material can reduce the amount of sulfide converted into sulfate and control generation of excessive AFt, meanwhile, the continuous hydration effect of the material in the later period is fully considered, and the later strength of the filling body is continuously increased. The defects of low strength, high cost, high hydration heat and the like of the high-sulfur superfine tailings which are cemented and filled by ordinary Portland cement are effectively overcome. The cementing material has the advantages of being low in filling cost, high in consolidation capacity and high in filling strength.

Description

technical field [0001] The invention relates to a filling gelling material, in particular to a low-cost solid waste-based gelling material. Background technique [0002] With the development of a large number of mines to deep mining, tailings, as the most important solid waste produced in the mine production process, have become one of the main problems to be solved in the construction of green mines due to problems such as large storage area, serious environmental pollution, and many safety hazards. one. Carrying out cemented tailings filling work is not only a fundamental solution to solve the environmental pollution problem of tailings ponds and eliminate potential safety hazards of tailings ponds, but also helps to reduce the cost of filling and mining, improve the comprehensive utilization of resources, and reduce land occupation. At present, cement is mostly used as the only or main cementing agent in the cemented filling of mines at home and abroad, and tailings (ful...

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Problems solved by technology

Research by Wang Bao et al. found that too high sulfide content in the tailings would cause the interior of the filling body to be corroded by sulfate, resulting in a decrease in the strength of the filling body; Then it continued to decline; studies by Zhang Qinli and others showed that sulfide was beneficial to the early strength of the filling body, but had an adverse effect on the final strength; Ayora et al. found that orpierite in cement slurry would react with cement hydration products to form gypsum and ettringite The ex

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