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Tundish magnesia coating material prepared by using waste magnesium aluminum spinel as raw material and method

A magnesia-aluminum spinel and tundish technology, which is applied in the production and application of clay products and ceramic materials, can solve problems such as affecting the performance of smears, difficulty in turning magnesia smears, and fluctuations in the quality of recycled materials. Excellent slag resistance, low cost, easy to turn over the bag

Active Publication Date: 2019-09-27
瑞泰马钢新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnesium smears produced by this scheme are often difficult to turn over and smear.
At the same time, due to the high selection cost of waste magnesia carbon bricks and magnesia aluminum carbon bricks, the quality of recycled materials fluctuates, which will affect the performance of smear materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Regenerated waste magnesium aluminum spinel is obtained by the following process:

[0026] (1) The waste magnesia-alumina-spinel bricks or magnesia-alumina-spinel prefabricated parts produced in the production process of refractory materials enterprises require the MgO content to be greater than 85%, and are sorted and crushed into 3-0mm particle sizes;

[0027] (2) Waste magnesia-alumina-spinel bricks or prefabricated parts after use in steel mills or cement kilns, after deslagging, sorting, and crushing into 3-0mm particle size;

[0028] (3) The waste magnesium aluminum spinel obtained by the two ways is mixed according to the ratio of 1:1, and each 200kg is mixed and put into the S112 type mixer mill for 20-25min, and then 3-1mm and 1-0mm are obtained by screening. Scrap magnesia-aluminum spinel particles of two particle sizes.

[0029] The tundish magnesium smear is prepared by the following process:

[0030] (1) The composition of the tundish magnesia smear is as...

Embodiment 2

[0037] Regenerated waste magnesium aluminum spinel was obtained by the same process as in Example 1.

[0038] The tundish magnesium smear is prepared by the following process:

[0039] (1) The composition of the tundish magnesia smear is as follows: the mass percentage of fused magnesia with a particle size of 5-3mm is 14%, the mass percentage of fused magnesia with a particle size of 1-0mm is 12%, and the fused magnesia with a particle size of 180 mesh The mass percentage of magnesia fine powder is 22%, the mass percentage of waste magnesium aluminum spinel with a particle size of 3-1mm is 25%, the mass percentage of waste magnesium aluminum spinel with a particle size of 1-0mm is 20%, and the mass percentage of Guangxi clay 2.5%, silica powder mass percentage 3.4%, water reducing agent sodium polyacrylate mass percentage 0.5%, water reducing agent sodium hexametaphosphate mass percentage 0.5%, explosion-proof fiber mass percentage 0.1%.

[0040] (2) The preparation process ...

Embodiment 3

[0046] Regenerated waste magnesium aluminum spinel was obtained by the same process as in Example 1.

[0047] The tundish magnesium smear is prepared by the following process:

[0048] (1) The composition of the tundish magnesia smear is as follows: the mass percentage of fused magnesia with a particle size of 5-3mm is 10%, the mass percentage of fused magnesia with a particle size of 1-0mm is 10%, and the fused magnesia with a particle size of 180 mesh The mass percentage of magnesia fine powder is 23%, the mass percentage of waste magnesium aluminum spinel with a particle size of 3-1mm is 25%, the mass percentage of waste magnesium aluminum spinel with a particle size of 1-0mm is 25%, and the mass percentage of Guangxi clay The mass percentage of Suzhou clay is 1%, the mass percentage of silica powder is 2.9%, the mass percentage of sodium polyacrylate is 0.7%, the mass percentage of water reducing agent sodium hexametaphosphate is 0.3%, and the mass percentage of explosion-...

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Abstract

The invention belongs to the technical field of unshaped refractory materials, and specifically relates to a tundish magnesia coating material prepared by using waste magnesium aluminum spinel as a raw material and a method. The waste magnesium aluminum spinel is obtained in two ways: waste magnesium aluminum spinel bricks or preformed units produced in a production process of a refractory material enterprise are prepared into the waste magnesium aluminum spinel with the particle diameter of 3-0 mm through sorting and crushing; waste magnesium aluminum spinel bricks or preformed units after use by steel mills are prepared into the waste magnesium aluminum spinel with the particle diameter of 3-0 mm through deslagging, sorting and crushing; the waste magnesium aluminum spinels obtained through the two ways are mixed according to the ratio of (1.5:1) to (1:1.5), and then are sieved to obtain waste magnesium aluminum spinel particles of two kinds of particle diameters of 3-1 mm and 1-0 mm; the waste magnesium aluminum spinel particles are taken as a raw material to be added with a binder, a plasticizer, a water reducer, an anti-knock agent, and the like at the same time to develop the tundish coating material which is stable in performance, high in strength, excellent in construction performance and low in cost; the cyclic utilization of waste refractory materials is realized; the enterprise production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of unshaped refractory materials, and in particular relates to a tundish magnesium smear made from waste magnesium aluminum spinel and a preparation method thereof. Background technique [0002] The smear material for tundish is generally magnesia smear material, and the aggregate is mostly made of fused magnesia, sintered magnesia or fused skin sand, and then mixed with magnesia fine powder, binder, water reducing agent, etc. Due to the good properties of magnesia, this kind of smear has the characteristics of long service life and excellent anti-slag performance. However, with the increasing price of raw materials, it is difficult for refractory companies to continue to use magnesia and other raw materials to produce magnesia spreads due to high cost pressures. It is imminent to develop new types of magnesia spreads with low cost and long life. . In order to reduce production costs, most refractory manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/443C04B33/132
CPCC04B35/66C04B35/443C04B33/1324C04B2235/3206C04B2235/349Y02P40/60
Inventor 陈海山卢咏明张小红崔任渠谷裕丰郁书中彭学峰何国柱
Owner 瑞泰马钢新材料科技有限公司
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