Magnesian high-strength gunning mix

A high-strength, gunning material technology, applied in the field of metallurgical refractory materials, can solve the problems of reducing the erosion resistance of the gunning material, the limited erosion resistance of molten steel, and reducing the melting point of magnesia, so as to reduce the consumption of the gunning material and reduce the difficulty of Structural spalling and the effect of improving high temperature sintering strength

Pending Publication Date: 2020-05-19
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of Na was introduced by the binder + Ions can greatly reduce the melting point of magnesia, forming a large amount of low-melting material at high temperature, which reduces the erosion resistance of the gunning material; at the same time, the shrinkage is severe at high temperature, forming a large number of cracks, resulting in serious penetration of steel slag, forming structural spalling
Some manufacturers prevent the fo

Method used

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  • Magnesian high-strength gunning mix
  • Magnesian high-strength gunning mix
  • Magnesian high-strength gunning mix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Magnesium high-strength gunning material 1, its composition and parts by weight are:

[0028]

[0029] Mix the above raw materials evenly in the mixer according to the ratio, add water and stir for 3 minutes, and carry out moisture-proof packaging after the material is discharged, and then it can be transported to the site for use.

Embodiment 2

[0031] Magnesium high-strength gunning material 2, its composition and parts by weight are:

[0032]

[0033]

[0034] Mix the above raw materials evenly in the mixer according to the ratio, add water and stir for 3 minutes, and carry out moisture-proof packaging after the material is discharged, and then it can be transported to the site for use.

Embodiment 3

[0036] Magnesium high-strength gunning material 3, its composition and parts by weight are:

[0037]

[0038] Mix the above raw materials in the mixer according to the ratio, add water and stir for 2 minutes, and pack them in moisture-proof packaging after discharge, and then transport them to the site for use.

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PUM

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Abstract

The invention discloses a magnesian high-strength gunning mix, which comprises the following raw materials in parts by weight: 50-97 parts of a magnesian raw material, 1-8 parts of magnesium aluminate, 1-10 parts of a plasticizer and 1-10 parts of a burning promoter, wherein the magnesium raw material is selected from sintered magnesia, high-calcium magnesia and a magnesium-chromium reclaimed material. According to the gunning mix, magnesium aluminate and a magnesian raw material quickly react to generate a gel on the premise that water exists, so that the bonding strength is generated while the adhesion performance of the gunning mix is improved; a small amount of a sintering promoter is added, so that sintering can be promoted at a high temperature, and the high-temperature sintering strength is effectively improved; and the gunning mix is limited in liquid phase quantity formed at a high temperature, small in shrinkage, good in steel slag permeability resistance and not easy to formstructural peeling.

Description

technical field [0001] The invention relates to the technical field of metallurgical refractory materials, in particular to a magnesium high-strength gunning material. Background technique [0002] In order to adapt to modern fast-paced iron and steel smelting and prolong the life of smelting vessels, it is necessary to continuously repair and maintain the weak areas of smelting vessels. Gunning is a common repair and maintenance measure, in which magnesium gunning materials are used for converter repair, RH insertion pipe repair, ladle slag line repair, etc., including magnesium gunning materials, magnesium calcium gunning materials, magnesium chromium gunning materials Materials and so on. [0003] Commonly used magnesium gunning material binders generally include one or more of phosphate series and sodium silicate. The phosphate series includes sodium tripolyphosphate, sodium hexametaphosphate, etc. The addition amount of the binder is generally 1-5 parts. A large amou...

Claims

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Application Information

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IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3208C04B2235/3222C04B2235/3418C04B2235/349C04B2235/96C04B2235/9607
Inventor 徐志华蔡长秀周辉姚亚双王志强秦常杰王忠
Owner WUGANG REFRACTORY CO LTD
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