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Chrysotile tailing microcrystal glass and preparation method thereof

A technology of glass-ceramics and chrysotile, which is applied in the field of chrysotile tailings treatment and comprehensive utilization, can solve the problems of high processing cost and low comprehensive utilization rate of tailings, achieve simple preparation method, good chemical anticorrosion function, reduce The effect of usage

Inactive Publication Date: 2010-11-24
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of asbestos waste and asbestos tailings generally adopts concrete solidification, vitrification sintering solidification, etc., and then deep burying after solidification, the comprehensive utilization rate of tailings is low, and the treatment cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] 1) Homogenize the chrysotile tailings: due to the inconsistent composition of chrysotile tailings produced in different periods and different mine sites, if they are directly used to produce glass-ceramics, the composition and performance of glass-ceramic products will be reduced. Metrics fluctuate and are inconsistent. It is necessary to pre-homogenize the selected chrysotile tailings before production; the pre-homogenization method is a conventional method, usually using the existing dry powder mixer to mix it warm by dry mechanical mixing or manual mixing. Homogenization of asbestos tailings to achieve uniform composition of chrysotile tailings;

[0036] The composition of the homogenized chrysotile tailings is: by weight percentage: SiO 2 40.42%, MgO39.87%, Al 2 o 3 0.36%, CaO0.07%, Fe 2 o 3 5.31%, Cr 2 o 3 0.06%, NiO0.43%, loss on ignition 13.48%;

[0037] The composition of the industrial waste fly ash mixed with it is, by weight percentage: SiO 2 46.57%,...

example 2

[0046] Step 1), step 4) and step 7) are all the same as Example 1, and will not be repeated here; its difference is:

[0047] Step 2) preparation of mixture (by weight percentage): get 30% of chrysotile tailings, 50% of fly ash, 10% of limestone, 3% of industrial fluorite; 3% of industrial barium nitrate, 4% of industrial soda ash; Put the mixture into the ball mill and mill it for 120 minutes, and the output particle size after mixing is less than 0.074mm;

[0048] Step 3) The melting temperature of the molten glass is 1450° C., and the holding time is 120 minutes;

[0049] Step 5) Compression molding: the glass powder is packed into a mould, and compressed under a pressure of 20 MPa;

[0050] Step 6) Sintering and crystallization: place the pressed glass blank in a tunnel kiln, raise the temperature to 930°C at a heating rate of 10°C / min, crystallize at a constant temperature for 120min, and then raise the temperature at a heating rate of 5°C / min to 1000°C, sinter at a con...

example 3

[0053] Step 1), step 4) and step 7) are all the same as Example 1, and will not be repeated here; its difference is:

[0054] Step 2) preparation of mixture (by weight percentage): get 36% of chrysotile tailings, 27% of fly ash, 18% of silica sand, 9% of limestone, 4% of industrial fluorite; 6% of industrial soda ash; the mixture Put it into the ball mill for 120 minutes, and the output particle size after ball milling is less than 0.074mm;

[0055] Step 3) The melting temperature of the molten glass is 1400° C., and the holding time is 90 minutes;

[0056] Step 5) Compression molding: the glass powder is packed into a mould, and compression molding is performed under a pressure of 25MPa;

[0057] Step 6) Crystallization and sintering: place the pressed glass blank in a high-temperature furnace, raise the temperature to 930°C at a heating rate of 10°C / min, crystallize at a constant temperature for 120 minutes, and then raise the temperature to 930°C at a heating rate of 8°C / m...

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Abstract

The invention discloses chrysotile tailing microcrystal glass and a preparation method thereof and belongs to the technical field of chrysotile tailing control and comprehensive utilization. The chrysotile tailing microcrystal glass comprises the following raw materials in percentage by weight: 30 to 50 percent of chrysotile tailing, 27 to 50 percent of fly ash, 9 to 10 percent of limestone, 0 to 4 percent of industrial barium nitrate, 0 to 4 percent of industrial fluorite and 4 to 6 percent of industry pure alkali. The preparation method comprises the following steps of: 1) performing pre-homogenizing treatment on the chrysotile tailing; 2) preparing a mixture; 3) melting glass liquid; 4) performing water quenching and preparing powder; 5) performing press forming; 6) performing crystallization and sintering; and 7) performing demoulding and post-processing. The microcrystal glass prepared by the method is applicable to building, chemical anticorrosion, wear resistant lining for mine and the like. The chrysotile tailing microcrystal glass and the preparation method have a reasonable formula, can effectively improve the comprehensive utilization rate of the chrysotile tailing and reduce environment pollution, and, through harmless phase inversion to the chrysotile tailing, lower the cost for treating chrysotile tailing waste and are beneficial for popularization and application.

Description

technical field [0001] The invention relates to a glass-ceramic and a preparation method thereof, in particular to a glass-ceramic of chrysotile tailings and a preparation method thereof, belonging to the technical field of treatment and comprehensive utilization of chrysotile tailings. Background technique [0002] Chrysotile tailings are a kind of waste rock tailings discharged in the process of chrysotile asbestos mining, the main component is serpentine. Due to the low grade of asbestos ore, dozens of cubic meters of tailings must be discharged for every ton of chrysotile produced, which has been stored for a long time and has not been utilized. As we all know, asbestos is a carcinogen, and chrysotile tailings are very harmful to the environment and human body. At present, asbestos waste and asbestos tailings are generally treated by concrete curing, vitrification and sintering curing, etc., and then buried deep after curing. The comprehensive utilization rate of tailin...

Claims

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Application Information

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IPC IPC(8): C03C6/10
Inventor 陈吉明彭同江孙红娟
Owner SOUTHWEAT UNIV OF SCI & TECH
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