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Gunning mix

A technology of gunning material and homogenizing material, applied in the field of gunning material, can solve the problems of prone to cracks, collapse, short service life, etc. Effect

Inactive Publication Date: 2020-09-29
王凤君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing gunning materials are difficult to meet the requirements of spraying conditions in terms of strength, wear resistance and erosion resistance, and are very different from gunning materials in terms of construction methods and maintenance. Moreover, when using gunning materials for maintenance, Due to the poor combination with the original material, it is easy to fall off after a period of use, resulting in a short service life, and local cracks or collapses are prone to occur. At the same time, the volume of the existing gunning material shrinks and changes greatly when subjected to high temperature. Therefore the applicant specially proposes a kind of gunning material according to the use needs of construction

Method used

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Examples

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preparation example Construction

[0028] A preparation method of gunning material, comprising the steps of:

[0029] S1. Fine grinding and screening of raw materials: fused magnesia is crushed and finely ground, and sieved into raw materials with 0 < particle size ≤ 1 mm, 1 mm < particle size ≤ 3 mm, and 200 mesh or less;

[0030] S2, batching: take corresponding weight component raw material according to weight;

[0031] S3. Mixing: According to step S1, divide the fused magnesia into two kinds of different diameters and particle sizes and mix them according to 2:1, and then add fused pure calcium aluminate cement, graphite, one-half aluminum powder, silicon Powder mixture, bauxite homogenate, aluminum sulfate, zirconia, plasticizer, kneading for 10 minutes, the mixture of aluminum powder and silicon powder is added in two times, and the remaining half of the powder is added before discharging. The mixture of aluminum powder and silicon powder is kneaded for 7 minutes and discharged.

specific Embodiment 1

[0033] A kind of gunning material, the weight components of the raw materials of the formula components are as follows: 85 parts of fused magnesia, 12 parts of fused pure calcium aluminate cement, 20 parts of graphite, 20 parts of alumina homogenizing material, zirconia 12 parts, 6 parts of additive, 8 parts of plasticizer, 6 parts of aluminum sulfate;

[0034] The preparation method of above gunning material, comprises the steps:

[0035] S1. Fine grinding and screening of raw materials: fused magnesia is crushed and finely ground, and sieved into raw materials with 0 < particle size ≤ 1 mm, 1 mm < particle size ≤ 3 mm, and 200 mesh or less;

[0036] S2, batching: take corresponding weight component raw material according to weight;

[0037] S3. Mixing: According to step S1, divide the fused magnesia into two kinds of different diameters and particle sizes and mix them according to 2:1, and then add fused pure calcium aluminate cement, graphite, one-half aluminum powder, sil...

specific Embodiment 2

[0039] A gunning material, the weight components of the raw materials of the formula components are as follows: 60 parts of fused magnesia, 6 parts of fused pure calcium aluminate cement, 15 parts of graphite, 10 parts of alumina homogenizing material, zirconia 6 parts, 2 parts of additive, 4 parts of plasticizer, 2 parts of aluminum sulfate;

[0040] The preparation method of above gunning material, comprises the steps:

[0041] S1. Fine grinding and screening of raw materials: fused magnesia is crushed and finely ground, and sieved into raw materials with 0 < particle size ≤ 1 mm, 1 mm < particle size ≤ 3 mm, and 200 mesh or less;

[0042] S2, batching: take corresponding weight component raw material according to weight;

[0043] S3. Mixing: According to step S1, divide the fused magnesia into two kinds of different diameters and particle sizes and mix them according to 2:1, and then add fused pure calcium aluminate cement, graphite, one-half aluminum powder, silicon Powd...

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Abstract

The invention provides a gunning mix. The gunning mix comprises the following components in parts by weight: 20-85 parts of fused magnesite, 5-15 parts of fused pure calcium aluminate cement, 8-20 parts of graphite, 10-30 parts of an alumina homogenized material, 5-25 parts of zirconium dioxide, 1-8 parts of an additive and 2-10 parts of a plasticizing aid. The gunning mix has the advantages of higher wear resistance, higher thermal shock resistance, high chemical erosion resistance, high strength, easiness in construction, simple preparation process and easiness in industrial production, cansave materials for users and lower cost, and effectively prolongs the overall service life of a coal injection pipe.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a gunning material. Background technique [0002] Repairing and maintaining the furnace lining is an important measure to prolong the life of the furnace lining and reduce the consumption of refractory materials. The most frequently used repairing measures are gunning of the furnace lining. In the middle and late stages of the furnace lining use, regular or irregular gunning maintenance of the partially melted parts of the furnace lining can effectively prolong the life of the furnace lining. Gunning includes dry gunning, semi-dry gunning and wet jetting. For the steelmaking furnace lining, due to factors such as high steelmaking and refining temperature, complex refining process, and smelting of different steel types, the furnace lining erodes quickly, and frequent gunning and maintenance of the furnace lining is required. The steelmaking furnace lining needs to h...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B35/626
CPCC04B35/0435C04B35/62605C04B2235/3222C04B2235/3208C04B2235/425C04B2235/3217C04B2235/3244C04B2235/428C04B2235/402C04B2235/349C04B2235/5427C04B2235/5436C04B2235/9669C04B2235/9607C04B2235/96
Inventor 王凤君
Owner 王凤君
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