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Method for fabricating aerated brick by using gold mine tailings and fluorite tailings

A technology of fluorite tailings and gold mine tailings, applied in applications, household utensils, ceramic products, etc., can solve the problems of low strength, high shrinkage rate, and high cost of sand aerated bricks, so as to reduce the accumulation of waste materials and increase utilization efficiency, huge economic and environmental value

Active Publication Date: 2014-02-05
LUOYANG FLUORIDE & POTASSIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Method for fabricating aerated brick by using gold mine tailings and fluorite tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 shown, including the following steps:

[0024] (1) Decyanation: Take 2000Kg of gold ore tailings and put them into a ball mill to grind them into powder, add 1000Kg of water to make a slurry, then add 20Kg of calcium hypochlorite to the slurry, stir for 15 minutes, and pour into the metering tank after stirring Stand still for 30 minutes to make decyanation slurry, in order to oxidize the cyanide components into non-toxic substances such as carbon dioxide and nitrogen;

[0025] Preparation of mixed powder: take 2000Kg of quicklime by weight, 300Kg of fluorogypsum, 4000Kg of fluorite tailings by weight, 500Kg of silica fume and 1000Kg of cement by weight and add them to a ball mill, stir and finely grind and mix to make mixed powder;

[0026] (2) Pulping: Mix decyanation slurry, mixed powder, 10Kg of aluminum powder paste and 3000Kg of water to form a mixed slurry;

[0027] (3) Blank making: pour the mixed slurry into the blank mold, and foam at 75°C f...

Embodiment 2

[0031] The difference from Example 1 is that this example adopts the preferred scheme. In step (1), the mixing sequence for making the mixed powder is to mix and stir the quicklime and fluorogypsum for 20 minutes, and then mix the fluorite tailings, silicon powder and Cement, which can effectively remove residual sulfuric acid in fluorogypsum.

Embodiment 3

[0033] The difference from Examples 1 and 2 is that this example adopts the preferred scheme, and in step (1), the mixing time of quicklime and fluorogypsum is 20 minutes.

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/02C04B18/30
CPCY02W30/91
Inventor 刘建林刘宏保刘海成张保忠陈永革吕本龙
Owner LUOYANG FLUORIDE & POTASSIUM TECH
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