Dry vibration mix for tundish and preparation method thereof

The technology of fused magnesia and binding agent is applied in the field of refractory materials, which can solve the problems of difficulty in turning over bales, pollution of molten steel, pollution of the environment, etc., and achieves the effects of good construction environment, prolonged service life and simple preparation process.

Inactive Publication Date: 2017-10-03
浙江欣辉耐火材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems in the prior art that the dry tundish material pollutes the environment, pollutes molten steel, and is difficult to turn over, the invention provides a dry tundish material that is environmentally friendly, can purify molten steel, and is easy to turn over.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), silica fume and boric acid, aluminum hydroxide powder, calcium carbonate powder for weighing: 65% fused magnesia, 10% silica fume and boric acid, 5% aluminum hydroxide powder, 8% Calcium carbonate powder (particle size 3 ≥95%), the balance is impurities;

[0030] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 22%, the fused magnesia with a particle size of 1~0.5mm accounts for 35%, and the particle size is 0.5~ 0.088mm fused magnesia accounted for 22%, and fused magnesia with particle size <0.064mm accounted for 21%;

[0031] (3) Add silica fume, boric acid, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 25 minutes to obtain mixed powder for later use;

[0032] (4) Put the fused magnesia and mixed powder obtained in step (2) into ...

Embodiment 2

[0035] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), bentonite and calcium phosphate, aluminum hydroxide powder, calcium carbonate powder for weighing: 45% fused magnesia, 25% bentonite and calcium phosphate, 10% aluminum hydroxide powder, 10% Calcium carbonate powder (particle size 3 ≥ 95%), the balance is impurities;

[0036] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 36%, the fused magnesia with a particle size of 1~0.5mm accounts for 25%, and the particle size is 0.5~ The fused magnesia of 0.088mm accounts for 24%, and the fused magnesia with a particle size of <0.064mm accounts for 15%;

[0037] (3) Add bentonite, calcium phosphate, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 30 minutes to obtain mixed powder for later use;

[0038] (4) Put the fused magnesia and mixed p...

Embodiment 3

[0041] (1) Fused magnesia (96.78% MgO, 1.25% CaO, 0.88% SiO 2 , 0.85% Fe 2 o 3 , the balance is impurities), silica sol, aluminum hydroxide powder, calcium carbonate powder for weighing: 55% fused magnesia, 20% silica sol, 5% aluminum hydroxide powder, 9% calcium carbonate powder (Particle size 3 ≥95%), the balance is impurities;

[0042] (2) Classify and process the fused magnesia according to the following particles: the fused magnesia with a particle size of 1~3mm accounts for 30%, the fused magnesia with a particle size of 1~0.5mm accounts for 30%, and the particle size is 0.5~ The fused magnesia of 0.088mm accounts for 24%, and the fused magnesia with a particle size of <0.064mm accounts for 16%;

[0043] (3) Add silica sol, aluminum hydroxide micropowder, and calcium carbonate powder into the mixer and mix for 30 minutes to obtain mixed powder for later use;

[0044] (4) Put the fused magnesia and mixed powder obtained in step (2) into a forced mixer and mix for 6 mi...

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Abstract

The invention provides a dry vibration mix for a tundish and a preparation method thereof. Based on the total mass of the dry vibration mix for a tundish, the dry vibration mix for a tundish is prepared from the following components in percentage by mass: 45-65% of fused magnesite, 15-25% of binding agent, 5-10% of aluminum hydroxide micropowder, 5-10% of calcium carbonate powder and the balance of impurity. The dry vibration mix finished product for a tundish is favorable in various technical performance indices; the raw materials are green and environmentally friendly, and can purify molten steel; the dry vibration mix realizes easy tundish removal and tundish turning, lowers the work intensity, increases the service life and saves the cost; and the dry vibration mix is simple in preparation process and is formed by a dry method during construction, thereby realizing a favorable construction environment.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a tundish dry material and a preparation method thereof. Background technique [0002] In recent years, with the continuous improvement of steel quality requirements, the less non-metallic inclusions in molten steel are required, the better. With the advancement of continuous casting technology, the life expectancy of tundish working layer materials is also getting higher and higher. At present, the working lining of tundish at home and abroad mainly adopts silicon insulation board and magnesium coating. The slag crust after use of the silicon insulation board is easy to remove, which can realize cold ladle pouring of steel, but the silicon insulation board has poor corrosion resistance, is easy to pollute the environment, and can also cause hydrogen embrittlement of the steel, which affects the quality of the billet; although the magnesium dry material It has good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043B22D41/02
CPCB22D41/02C04B35/043C04B2235/3208C04B2235/3217C04B2235/3418C04B2235/5436C04B2235/77C04B2235/96
Inventor 袁海强
Owner 浙江欣辉耐火材料股份有限公司
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