Magnesium-zirconium spinel ramming material for furnace bottom

A technology of zirconium spinel and magnesium aluminum spinel, which is applied in the field of zirconium spinel furnace bottom ramming materials, can solve the problems of low shrinkage, furnace lining settlement, and steel wear, and achieve low linear shrinkage and excellent Good performance in high temperature use and corrosion resistance of molten steel

Active Publication Date: 2014-10-22
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, domestic iron and steel enterprises have more than 10,000 times of converter steelmaking furnace life, and the problem of steel infiltration in the triangle area of ​​the converter bottom affecting the furnace life is also reflected. Since the joint between the converter lining and the spherical furnace bottom is mostly filled with ordinary magnesia, in Cavities appear during use, which can also cause the overall subsidence of the furnace lining; with the erosion and erosion of molten steel durin

Method used

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  • Magnesium-zirconium spinel ramming material for furnace bottom
  • Magnesium-zirconium spinel ramming material for furnace bottom
  • Magnesium-zirconium spinel ramming material for furnace bottom

Examples

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Example Embodiment

[0016] Example 1 A magnesium-zirconium spinel ramming material for furnace bottom

[0017] The raw materials used are prepared according to the following parts by weight:

[0018]

[0019]

[0020] High-grade magnesia is the aggregate whose magnesium content is greater than or equal to 97%, the particle size is ≤5 mesh, the particle size of magnesia-aluminum spinel is ≤4 mesh, and the particle size of zirconia is ≤800 mesh. Zirconium and high-temperature asphalt are mixed and evenly mixed in proportion to obtain the finished product.

[0021] The ramming material was mixed with an appropriate amount of water to make a blank, and the compressive strength and permanent linear change rate after firing were tested. The results are shown in Table 1. It can be seen from Table 1 that the ramming material has high bonding strength. After calcination at a temperature of not less than 1200℃ and 3h, the compressive strength can still reach 12MPa, so the ramming material can effectively support...

Example Embodiment

[0022] Example 2 A kind of magnesium-zirconium spinel ramming material for furnace bottom

[0023] The raw materials used are prepared according to the following parts by weight:

[0024]

[0025] High-grade magnesia is the aggregate whose magnesium content is greater than or equal to 97%, the particle size is ≤5 mesh, the particle size of magnesia-aluminum spinel is ≤4 mesh, and the particle size of zirconia is ≤800 mesh. Zirconium and sodium tripolyphosphate are mixed and stirred evenly in proportion to obtain the finished product.

[0026] The ramming material was mixed with an appropriate amount of water to make a blank, and the compressive strength and permanent linear change rate after firing were tested. The results are shown in Table 1. It can be seen from Table 1 that the ramming material has high bonding strength. After calcination at a temperature of not less than 1200℃ and 3h, the compressive strength can still reach 11.4MPa, so the ramming material can effectively suppo...

Example Embodiment

[0027] Example 3 A kind of magnesium-zirconium spinel ramming material for furnace bottom

[0028] The raw materials used are prepared according to the following parts by weight:

[0029]

[0030] High-grade magnesia is the aggregate whose magnesium content is greater than or equal to 97%, the particle size is ≤5 mesh, the particle size of magnesia-aluminum spinel is ≤4 mesh, and the particle size of zirconia is ≤800 mesh. The zirconium, sodium hexametaphosphate and uropinto are mixed and mixed uniformly in proportion to obtain the finished product.

[0031] The ramming material was mixed with an appropriate amount of water to make a blank, and the compressive strength and permanent linear change rate after firing were tested. The results are shown in Table 1. It can be seen from Table 1 that the ramming material has high bonding strength. After calcination at a temperature of not less than 1200℃ and 3h, the compressive strength can still reach 11MPa, so the ramming material can eff...

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Abstract

The invention discloses a magnesium-zirconium spinel ramming material for a furnace bottom. The ramming material is prepared from the following raw materials in parts by weight: 50-80 parts of high-grade magnesia, 10-35 parts of magnesium aluminate spinel, 2-8 parts of zirconium oxide and 7-15 parts of carbon-contained binding agent. The ramming material can be used for improving the filling condition of a triangle area part at the furnace bottom and providing a certain protection for a furnace shell in a high-temperature state, so that the furnace life is prolonged, and the working safety is favorably realized.

Description

technical field [0001] The invention relates to a zirconium spinel furnace bottom ramming material for a steelmaking converter, in particular to a magnesium-zirconium spinel furnace bottom ramming material. Background technique [0002] At present, domestic iron and steel enterprises have more than 10,000 times of converter steelmaking furnace life, and the problem of steel infiltration in the triangle area of ​​the converter bottom affecting the furnace life is also reflected. Since the joint between the converter lining and the spherical furnace bottom is mostly filled with ordinary magnesia, in Cavities appear during use, which can also cause the overall subsidence of the furnace lining; with the erosion and erosion of molten steel during use, the triangular area where the spherical furnace bottom and the furnace lining are combined is gradually corroded, and to a certain extent, molten steel seeps in from the joint, greatly It will affect the life of the furnace and caus...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘冲霍斌杨毅
Owner LIAONING ZHONGMEI HLDG
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