Method for making aerated bricks using gold ore tailings and fluorite tailings

Abstract

The invention relates to a method for fabricating an aerated brick by using gold mine tailings and fluorite tailings. The method comprises the following steps: (1) decyanation: grinding the gold mine tailings into powder, adding water to prepare slurry, then adding calcium hypochlorite to the slurry, stirring and standing; preparation of mixed powder: grinding and evenly mixing quick lime, fluorgypsum, fluorite tailings, silicon powder and cement to prepare the mixed powder; (2) preparation of slurry: mixing and stirring decyanation slurry, the mixed powder, aluminium powder paste and water into mixed slurry; (3) preparation of a green body: pouring the mixed slurry into a mold, and foaming to prepare the green body; (4) fabrication of the aerated brick: cutting the blank and carrying out autoclaved curing to obtain an aerated brick product. The traditional industrial wastes polluting the environment, such as the gold mine tailings, the fluorite tailings and the like are prepared into the aerated bricks by innocent treatment through the steps such as decyanation, preparation of the mixed powder, preparation of the slurry, preparation of the green body, fabrication of the aerated bricks and the like, and the waste materials are changed into precious materials, so that the resources are fully utilized, and the environmental pollution is reduced.

Description

technical field

[0001] The invention relates to a method for making aerated bricks, in particular to a method for making aerated bricks by using gold ore tailings and fluorite tailings. Background technique

[0002] Aerated bricks are aerated concrete blocks produced by high-temperature autoclaved equipment. Aerated bricks have the advantages of light weight, good thermal insulation performance, and easy processing. It is usually divided into sand aeration and ash aeration according to different raw materials. Compared with gray aerated bricks, sand aerated bricks have advantages in strength and shrinkage, but the cost of sand aerated bricks is higher, and gray aerated bricks have low strength, high shrinkage, and contain trace radioactive elements to pollute the environment The problem. However, the fluorite tailings of the current fluorine chemical industry, gold smelters and waste residues in the fluorine chemical industry have been difficult to make good use of. The f...

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