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Method for preparing microcrystalline glass from chlorine-containing titanium extraction slag

A technology of glass-ceramics and titanium slag, which is applied in glass forming, glass production, glass manufacturing equipment, etc., can solve the problems of cumbersome procedures, high production energy consumption, and low utilization rate of waste slag, so as to meet the technical requirements of the process and avoid The effect of high temperature melting and no discharge of three wastes

Active Publication Date: 2019-01-04
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the bulk crystallization method and the melting and sintering method contain a high-temperature melting process, and both require a secondary high-temperature treatment process, so there are disadvantages or defects such as high energy consumption, long process flow, cumbersome procedures, and low utilization rate of industrial waste residues.
[0004] In summary, the existing mainstream glass-ceramic production process has problems such as high production energy consumption, long process flow, and low utilization rate of waste slag.
In addition, due to the high chlorine content of the chlorine-containing titanium extraction slag, it is difficult to be directly used in building materials. It must be washed and roasted to remove chlorine or add a dechlorination agent to roast to remove chlorine before it can be used, and the added value of the product after chlorine removal is low.
[0005] At present, there is no method for preparing glass-ceramics with only one high-temperature treatment process, and during the preparation process, chlorine-containing titanium slag can be dechlorinated

Method used

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  • Method for preparing microcrystalline glass from chlorine-containing titanium extraction slag
  • Method for preparing microcrystalline glass from chlorine-containing titanium extraction slag
  • Method for preparing microcrystalline glass from chlorine-containing titanium extraction slag

Examples

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Effect test

example 1

[0063] The specific preparation method is as follows:

[0064] 1) Take the chlorine-containing titanium extraction slag treated by the "high temperature carbonization-low temperature chlorination" titanium extraction process from a certain place in Sichuan as the main raw material. The ingredients are quartz, potash feldspar and borax. Dry for 8 hours in a drying room at 105°C, and then crush, grind, and classify. The components are 85% chlorine-containing blast furnace slag (chlorine-containing titanium extraction slag), quartz 5%, potash feldspar 7%, and Borax 3% was weighed and blended, and a powder with a particle size of 96 μm was used as the powder for billet making.

[0065] 2) Evenly spread the powder for billeting into the mold without adding granulating agent and binder. Under the press, the pressure is 714kgf / cm 2 , The pressing conditions of the holding time of 20s are dry-pressed and then demolded to obtain the glass-ceramic body.

[0066] 3) Put the glass-ceramic body ...

example 2

[0069] The specific preparation method is as follows:

[0070] 1) Using the chlorine-containing titanium extraction slag in Example 1 as all raw materials, the chlorine-containing titanium extraction slag is dried in a drying room at 110°C for 12 hours, then crushed, ground, and classified, and the powder with a particle size of 96μm is used as a preform Powder.

[0071] 2) Place the powder for billeting flat in the mold, using a press, at a pressure of 510kgf / cm 2 , Dry pressing and forming under the condition of 20s holding pressure, and then demolding, to obtain the glass-ceramic body. No granulating agent and binder are added during the forming process of the glass-ceramic body.

[0072] 3) Put the glass-ceramic body into the tunnel kiln, set the heat treatment program and parameters, specifically: increase the temperature from room temperature to 890°C at a temperature rise rate of 5°C / min, hold for 30 minutes; then set the temperature at 3°C / min The heating rate is increased ...

example 3

[0075] The specific preparation method is as follows:

[0076] 1) The chlorine-containing titanium extraction slag, quartz and nepheline are placed in a drying room at 108°C for 8 hours, and the components are weighed and blended according to mass percentages of 85% chlorine-containing blast furnace slag, 10% quartz, and 5% nepheline , And then crushed, pulverized, and classified to obtain a particle size of 75μm.

[0077] 2) Place the powder for billeting evenly and flatly in the mold, using a press, at 357kgf / cm 2 Under pressure, hold the pressure for 15s for dry pressing, and then demold to obtain the glass-ceramic body. No granulating agent and binder are added during the forming process of the glass-ceramic body.

[0078] 3) Put the glass-ceramic body into the tunnel kiln, set the heat treatment procedure and parameters, specifically: increase from room temperature to 950°C at a heating rate of 5°C / min, hold for 30 minutes; then set the heat treatment at 3°C / min The heating ra...

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Abstract

The invention provides a method for preparing microcrystalline glass from chlorine-containing titanium extraction slag. The method includes steps of drying and smashing the chlorine-containing titanium extraction slag, or pretreating the chlorine-containing titanium extraction slag and accessories to obtain blank preparation powder; carrying out compression molding on the blank preparation powderto obtain microcrystalline glass blanks; carrying out heat treatment on the blanks to obtain the microcrystalline glass. The mass fraction of the chlorine-containing titanium extraction slag in the blank preparation powder is higher than 85%. The method has the advantages that the chlorine-containing titanium extraction slag is high in utilization rate; nucleation agents, granulation agents and binders are omitted in preparation procedures; waste gas, wastewater and industrial residue emission can be prevented in production procedures.

Description

Technical field [0001] The invention relates to the field of solid waste treatment and resource utilization and the preparation of inorganic non-metal functional materials, in particular to a method for preparing glass-ceramics by using chlorine-containing titanium extraction slag. Background technique [0002] Chlorine-containing titanium extraction slag is a titanium extraction slag obtained after high-temperature carbonization and low-temperature chlorination of titanium-containing blast furnace slag. Its chlorine content is relatively high and has been classified as a hazardous slag, which is very harmful to the soil and environment. Therefore, the treatment and comprehensive utilization of chlorine-containing titanium extraction slag are very important. [0003] Glass-ceramics, also known as glass ceramics and microcrystalline ceramics, are based on glass and ceramic molding technology. By controlling the heat treatment system, a type of polycrystalline material in which the m...

Claims

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Application Information

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IPC IPC(8): C03C10/00C03B1/00C03B1/02C03B19/06
CPCC03B1/00C03B1/02C03B19/06C03C10/0063Y02P40/50
Inventor 孙红娟尤皓彭同江丁文金曾丽
Owner SOUTHWEAT UNIV OF SCI & TECH
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