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Magnesia coating and preparation method thereof

A smear, magnesium technology, used in the field of refractory materials, to achieve good adhesion, reduced emissions, and good corrosion resistance

Inactive Publication Date: 2019-10-22
云南濮耐昆钢高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to propose a magnesium smear and its preparation method, which solves the technical problem of recycling waste refractory materials in the prior art

Method used

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preparation example Construction

[0031] The invention provides a magnesia smear made by using waste straight magnesia bricks, magnesia and silicon micropowder after cement kiln use as raw materials and adding additives and a preparation method thereof. The magnesium smear prepared by the invention has good cohesiveness and constructability. Preferably, the magnesium smear of the present invention comprises the following raw materials in mass percentage:

[0032] Aggregate: waste straight magnesia brick 30-40%, 92 fused magnesia 30-40%;

[0033] Powder: waste straight magnesia brick powder 10-15%, 92 fused magnesia powder 10-15%, silicon micropowder 2-5%;

[0034] The sum of the mass percentages of aggregate and powder components is 100%;

[0035] The magnesium spread also includes additional additives.

[0036] Preferably, the additive includes the following components in mass percentage: 70-75% of paper fiber, 12-15% of sodium hexametaphosphate, 12-15% of calcium lignosulfonate, and the sum of the mass pe...

Embodiment 1

[0042] The preparation method of the magnesium smear of the present embodiment is as follows:

[0043] (1) Weigh according to the following weight ratio:

[0044] Aggregate: Add 15% of waste straight magnesia brick 2-1mm, add 15% of waste straight magnesia brick 1-0mm, add 20% of 92 fused magnesia 2-1mm, add 92 fused magnesia 1-0mm 20%;

[0045] Powder: 10% of waste straight magnesia brick 180 mesh, 15% of 92 fused magnesia 180 mesh, 5% of silicon micropowder;

[0046] Additive 2%;

[0047] The additives include the following components in weight percentage: 70% of paper fiber, 15% of sodium hexametaphosphate, and 15% of calcium lignosulfonate.

[0048] (2) Stirring, add the aggregate, powder and additives into the mixer in proportion, and stir in the mixer for 2-3 minutes to mix evenly, then add 15-18% water and stir for 3-5 minutes, after stirring evenly, it can be applied construction.

Embodiment 2

[0050] The preparation method of the magnesium smear of the present embodiment is as follows:

[0051] (1) Weigh according to the following weight ratio:

[0052] Aggregate: 15% of waste straight magnesia brick 2-1mm, 20% of waste straight magnesia brick 1-0mm, 15% of 92 fused magnesia 2-1mm, 15% of 92 fused magnesia 1-0mm 20%;

[0053] Powder: 14% of waste straight magnesia brick 180 mesh, 14% of 92 fused magnesia 180 mesh, 2% of silicon micropowder;

[0054] Additive 1%;

[0055] The additives include the following components in weight percentage: 74% of paper fiber, 13% of sodium hexametaphosphate, and 13% of calcium lignosulfonate.

[0056](2) Stirring, add the aggregate, powder and additives into the mixer in proportion, and stir in the mixer for 2-3 minutes to mix evenly, then add 15-18% water and stir for 3-5 minutes, after stirring evenly, it can be applied construction.

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Abstract

The invention discloses a magnesia coating and a preparation method thereof, relates to the technical field of refractory materials, and solves the technical problem of recycling waste refractory materials in the prior art. The magnesia coating comprises the following raw materials in percentage by mass: 30-40% of waste direct magnesia bricks, 30-40% of 92 fused magnesia; 10 to 15% of waste directmagnesia brick powder, 10 to 15% of 92 fused magnesia powder, 2 to 5% of silicon micropowder and 1-2% of an additive. The magnesia coating has the advantages of good cohesiveness, high strength afterburning and good erosion resistance. That is, the magnesia coating material and the preparation method thereof solve the technical problem of recycling the waste refractory materials, can not only reduce the production cost of the magnesia coating material, but also reduce the discharge amount of solid wastes.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a magnesium smear and a preparation method thereof. Background technique [0002] In the production process of high-temperature industries such as steel, ceramics, cement and glass, a large amount of refractory materials are consumed, so a large amount of waste refractory materials are generated; in addition, a large amount of waste and refractory material waste are also generated in the production process of refractory products themselves . Except for a very small number of waste refractory materials that can be returned to the production line for reuse, a large number of them are used as landfills or downgraded. [0003] In addition, discarded refractory materials also pollute the environment, mainly in: ① dust; ② silicosis of crystalline silica; ③ radioactivity of zirconia raw materials; ④ Cr 6+ ⑤ carcinogenicity of refractory fibers and asbestos; ⑥ pollution of...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/622
CPCC04B35/043C04B35/62204C04B2235/447C04B2235/9607
Inventor 张舰孙文新鲁志燕陈学松
Owner 云南濮耐昆钢高温材料有限公司
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