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Chrysotile asbestos tailings ceramsite and preparation method thereof

A chrysotile and tailings technology, which is applied in the field of chrysotile tailings ceramsite and its preparation, can solve problems such as environmental pollution, and achieve the effects of stable chemical properties, good corrosion resistance, and improved comprehensive utilization.

Active Publication Date: 2019-04-02
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of chrysotile tailings ceramsite and its preparation method to solve the problem of environmental pollution caused by the accumulation of chrysotile tailings and achieve the effect of treating waste with benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The chrysotile tailings ceramsite of the present embodiment comprises: in parts by weight, 50 parts of chrysotile tailings, 5 parts of clay, 10 parts of coal powder, 10 parts of limestone, 1 part of industrial caustic soda, 1 part of silica sand, and 5 wt% of water 25 parts of glass solution. Among them, the water glass is soda water glass with a modulus of M1-2.

[0026] The preparation method of the chrysotile tailings ceramsite of the present embodiment comprises:

[0027] (1) Grinding and mixing chrysotile tailings, clay, coal powder, limestone, industrial caustic soda and silica sand to obtain a powder with a particle size of less than 0.2 mm;

[0028] (2) Add the powder into the pelletizing machine, and spray into the water glass aqueous solution to obtain the corresponding wet ball;

[0029] (3) Dry the wet pellets at a temperature of 105°C for 2 hours to obtain dried pellets;

[0030] (4) Preheat the dried ball at 350°C for 1 hour, then place it in a roasting...

Embodiment 2

[0033] The chrysotile tailings ceramsite of the present embodiment comprises: in parts by weight, 60 parts of chrysotile tailings, 15 parts of clay, 10 parts of coal powder, 15 parts of limestone, 3 parts of industrial caustic soda, 5 parts of silica sand, and 7 wt% of water 30 parts of glass aqueous solution. Among them, the water glass is soda water glass with a modulus of M1-2.

[0034] The preparation method of the chrysotile tailings ceramsite of the present embodiment comprises:

[0035] (1) Grinding and mixing chrysotile tailings, clay, coal powder, limestone, industrial caustic soda and silica sand to obtain a powder with a particle size of less than 0.2mm;

[0036] (2) Add the powder into the pelletizing machine, and add the water glass aqueous solution to obtain the corresponding wet ball;

[0037] (3) Dry the wet ball at 120°C for 1 hour to obtain the dried ball material;

[0038] (4) Preheat the dried pellets at 350°C for 2 hours, then place them in a roasting f...

Embodiment 3

[0041] The chrysotile tailings ceramsite of the present embodiment comprises: in parts by weight, 70 parts of chrysotile tailings, 20 parts of clay, 15 parts of coal powder, 15 parts of limestone, 3 parts of industrial caustic soda, 7 parts of silica sand, and 7 wt% of water 32 parts of glass aqueous solution. Among them, the water glass is soda water glass with a modulus of M1-2.

[0042] The preparation method of the chrysotile tailings ceramsite of the present embodiment comprises:

[0043] (1) Grinding and mixing chrysotile tailings, clay, coal powder, limestone, industrial caustic soda and silica sand to obtain a powder with a particle size of less than 0.2mm;

[0044] (2) Add the powder into the pelletizing machine, and add the water glass aqueous solution to obtain the corresponding wet ball;

[0045] (3) Dry the wet pellets at a temperature of 135°C for 1 hour to obtain dried pellets;

[0046] (4) Preheat the dried pellets at 375°C for 1.5 hours, then place them in ...

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Abstract

The invention discloses a chrysotile asbestos tailings ceramsite and a preparation method thereof, which relates to the technical field of comprehensive utilization of chrysotile asbestos tailings. The chrysotile asbestos tailing ceramsite comprises the following raw materials in parts by weight: 50-90 parts of chrysotile asbestos tailings, 5-40 parts of clay, 10-20 parts of pulverized coal, 10-20parts of limestone, 1-5 parts of industrial caustic soda, 1-10 parts of silica sand and 25-40 parts of 5-10 wt% aqueous sodium silicate solution. The chrysotile asbestos tailings ceramsite prepared by the invention has the advantages of light weight, high strength, stable chemical performance, environmental friendliness, no pollution, changing harm into benefit, and improving the comprehensive utilization rate of the chrysotile asbestos tailings.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of chrysotile tailings, in particular to ceramsite from chrysotile tailings and a preparation method thereof. Background technique [0002] Chrysotile tailings are a kind of waste rock tailings that are discharged during the mining process of chrysotile asbestos, and the main component is chrysotile. As we all know, asbestos is a carcinogen and has serious harm to the environment and human body. Chrysotile tailings have been included in the "National List of Hazardous Wastes". Due to the low grade of chrysotile ore, dozens of tons of tailings must be discharged for every ton of chrysotile produced, and its stockpile is estimated to reach more than 200 million tons in China. The stockpiling of chrysotile tailings not only occupies a large amount of land resources, but also causes serious damage to the local ecological environment. Therefore, it is necessary to carry out harmless ...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/13C04B38/02C04B38/06
CPCC04B33/13C04B33/132C04B38/009C04B2235/3201C04B2235/3208C04B2235/3418C04B2235/3427C04B38/0067C04B38/02C04B38/068Y02P40/60
Inventor 陈吉明张雅倩
Owner SOUTHWEAT UNIV OF SCI & TECH
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