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Method for preparing microcrystalline foam glass from vanadium-titanium magnet tailings

A technology of microcrystalline foam glass and vanadium-titanium magnet, applied in glass forming, glass manufacturing equipment, manufacturing tools, etc., can solve the problem of difficulty in increasing the added value of vanadium-titanium magnet tailings industry, etc., so as to improve glass toughness and improve utilization The effect of increasing the foaming porosity

Active Publication Date: 2021-08-31
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the present situation in the field of research and development of the problem that common methods are difficult to increase the industrial added value of vanadium-titanium magnet tailings, and provides a method for preparing microcrystalline foam glass from vanadium-titanium magnet tailings

Method used

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  • Method for preparing microcrystalline foam glass from vanadium-titanium magnet tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) After the vanadium-titanium magnet tailings are washed and dried, they are activated in hydrofluoric acid with a concentration of 0.5mol / L. The activation equipment is a gravity induction magnetic stirrer, and then a sodium hydroxide solution with a concentration of 0.3mol / L is added. Neutralize, precipitate, and wash to obtain active vanadium-titanium magnet tailings;

[0026] (2) Mix and ball mill active vanadium-titanium magnet tailings, carbon powder, flat glass powder, silicon dioxide powder, calcium oxide powder, and sodium oxide powder in a ratio of 76:1.2:9.1:9.3:1.1:3.3, and then add mass concentration It is 3.5% PVA alcohol forming agent, which is placed in a cold press mold and pressed into shape, and the cold press pressure is 68MPa; the ball mill is carried out in a ball mill tank, and the ball mill time is 20 hours. The material of the ball mill tank is nylon, and the material of the ball mill is zirconia. The speed is 170 rpm.

[0027] (3) Put the co...

Embodiment 2

[0029] (1) After the vanadium-titanium magnet tailings are washed and dried, they are activated in hydrofluoric acid with a concentration of 1.1mol / L. The activation equipment is a gravity induction magnetic stirrer, and then a sodium hydroxide solution with a concentration of 0.8mol / L is added. Neutralize, precipitate, and wash to obtain active vanadium-titanium magnet tailings;

[0030] (2) Mix and ball mill active vanadium-titanium magnet tailings, carbon powder, flat glass powder, silica powder, calcium oxide powder, and sodium oxide powder in a ratio of 70:1.2:10.1:10.3:3.1:5.3, and then add mass concentration It is 3.5% PVA alcohol forming agent, which is placed in a cold press mold and pressed into shape, with a cold press pressure of 98 MPa; the ball mill is carried out in a ball mill tank, and the ball milling time is 16 hours. The material of the ball mill tank is nylon, and the material of the ball mill is zirconia. The speed is 165 rpm.

[0031] (3) Put the cold-p...

Embodiment 3

[0033] (1) After the vanadium-titanium magnet tailings are washed and dried, they are activated in hydrofluoric acid with a concentration of 0.8mol / L. The activation equipment is a gravity induction magnetic stirrer, and then a sodium hydroxide solution with a concentration of 0.7mol / L is added. Neutralize, precipitate, and wash to obtain active vanadium-titanium magnet tailings;

[0034] (2) Mix and ball mill active vanadium-titanium magnet tailings, carbon powder, flat glass powder, silicon dioxide powder, calcium oxide powder, and sodium oxide powder in a ratio of 68:1.2:11.1:11.3:3.1:5.3, and then add mass concentration It is 3.5% PVA alcohol forming agent, which is placed in a cold press mold and pressed into shape, and the cold press pressure is 70MPa; the ball mill is carried out in a ball mill tank, and the ball mill time is 15 hours. The material of the ball mill tank is nylon, and the material of the ball mill is zirconia. The speed is 160 rpm.

[0035] (3) Put the ...

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Abstract

The invention discloses a method for preparing microcrystalline foam glass from vanadium-titanium magnet tailings. The activated vanadium-titanium magnet tailings are obtained by pickling first, mixed with calibration materials, co-solvents and foaming agents and ball-milled, then cold-pressed Compressed in the machine, finally melted and crystallized in the sintering furnace, and finally obtained the microcrystalline foam glass material. Using vanadium-titanium magnetite tailings as the main raw material, by adding correction raw materials, foaming agent, co-solvent and adopting crystallization process, the preparation of foam glass with a small amount of microcrystals can be realized, which greatly reduces the cost of raw materials and improves the toughness of glass. The method has high compositional control precision, strong process stability and repeatability, and can realize high industrial added value of vanadium-titanium magnet tailings.

Description

technical field [0001] The invention relates to the technical field of preparation of thermal insulation building materials, in particular to a method for preparing microcrystalline foam glass from vanadium-titanium magnet tailings. Background technique [0002] Vanadium-titanium magnetite tailings are wastes produced by the iron and steel metallurgy industry. It usually contains compounds such as silicon dioxide, calcium oxide, iron oxide, sodium oxide, and titanium oxide. At present, it is mainly used in building materials such as pavement bricks and wall bricks, as well as in the cement industry, so that its industrial added value is not high. Therefore, it is very important to develop a new way to increase its industrial added value. [0003] Foam glass is an ideal wall insulation material, but the raw material cost of making foam glass from pure raw materials and fly ash is relatively high, making it difficult to popularize. Contents of the invention [0004] The in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C11/00C03C10/00C03C6/04C03C1/02C03B19/06C03B32/02
CPCC03B19/06C03B32/02C03C1/002C03C1/02C03C10/0063C03C11/007
Inventor 董洪峰
Owner SHAANXI SCI TECH UNIV
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