Method for producing pasty unclassified tailing filling materials containing red mud

Abstract

The present invention provides a method for producing pasty unclassified tailing filling materials containing red mud and belongs to the fields of environmental protection engineering and mineral engineering. The method is characterized by comprising the following steps: firstly, stoving the required materials comprising red mud, slag and desulfurized gypsum respectively; then, grinding red mud, slag, cement clinker and desulfurized gypsum with the corresponding dry-basis weight percentage being 24%-50%, 30%-56%, 1%-15%, and 1%-15% in a separate or mixed manner until the specific surface area thereof reaches 300-900m<2> / kg, to obtain a gel material; and evenly stirring by the weight ratio between the gel material and the unclassified tailings being 0.08-0.20 and the weight ratio between water and the gel material being 1.2-3.0, so as to obtain qualified pasty unclassified tailing filling materials. The method for producing pasty unclassified tailing filling materials containing red mud provided by the present invention can make good use of solid waste that is difficult to be comprehensively utilized, such as red mud, desulfurized gypsum and unclassified tailings and solve the problems of high cost and low early strength in cement-bonded filling mining.

Description

technical field

[0001] The invention belongs to the fields of environmental protection engineering and mining engineering, and in particular relates to a method for producing paste full tailings filling material by using solid wastes such as Bayer process red mud, water-quenched blast furnace slag, desulfurized gypsum and whole tailings. Background technique

[0002] On the one hand, mining development has promoted economic development and social progress, but on the other hand, it has caused environmental pollution and affected social development. Mine filling technology is gradually developed to meet the needs of mining development. Generally, natural sand, rod grinding, waste rock or whole tailings are used as filling aggregates, and cement is used as cementing agent. The unit consumption of filling cement is about 200m 2 / kg, due to the high cost of cement, natural sand, and rod sanding in raw materials, many mines can only hold back cemented filling.

[0003] my countr...

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