MgO-CaO-Fe2O3 series electric furnace ramming material prepared from fine magnesia-calcium brick powder

A technology of mgo-cao-fe2o3, magnesia-calcium bricks, applied in the field of refractory materials, can solve problems such as environmental pollution, cracks, and high energy consumption, achieve improved thermal shock stability and corrosion resistance, simple preparation process, and realize waste The effect of using

Inactive Publication Date: 2017-10-20
辽宁利尔镁质合成材料股份有限公司 +1
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Problems solved by technology

[0003] Conventional magnesia-calcium-iron dry ramming material is a mixture composed of pre-synthesized magnesia-calcium-iron sand and sintered magnesia or fused magnesia according to a certain particle size distribution, and then sintered; the magnesia-calcium-iron sand is lightly fired Magnesium powder and iron red balls are calcined, and the process of preparing magnesia-calcium-iron sand re

Method used

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  • MgO-CaO-Fe2O3 series electric furnace ramming material prepared from fine magnesia-calcium brick powder
  • MgO-CaO-Fe2O3 series electric furnace ramming material prepared from fine magnesia-calcium brick powder
  • MgO-CaO-Fe2O3 series electric furnace ramming material prepared from fine magnesia-calcium brick powder

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[0019] The specific implementation of the present invention will be further described below:

[0020] A MgO-CaO-Fe prepared by using fine powder of magnesium-calcium brick 2 O 3 The electric furnace ramming material is prepared from the following parts by weight: 0~0.078mm magnesia-calcium brick fine powder less than 95 parts, 0~0.078mm light burnt magnesia powder less than 50 parts, iron red less than 6 parts, MgO 1~3 parts of micropowder, α-Al 2 O 3 1 to 5 parts of micro powder, 0.5 to 5 parts of ceramic fiber, 1 to 1.5 parts of titanium oxide.

[0021] The main components in the ceramic fiber include alumina, zirconia and lanthanum oxide, and the weight ratio of the three is alumina: zirconia: lanthanum oxide=10-15:3-5:1-2.

[0022] The particle size of the MgO powder is 3-5μm, and the α-Al 2 O 3 The particle size of the micropowder is 1-3 μm.

[0023] The chemical indicators of magnesia-calcium brick fine powder and light burnt magnesia powder are shown in Table 1:

[0024] Table 1...

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Abstract

The invention provides a MgO-CaO-Fe2O3 series electric furnace ramming material prepared from fine magnesia-calcium brick powder. The MgO-CaO-Fe2O3 series electric furnace ramming material is prepared from, by weight, 95 or below parts of 0-0.078 mm fine magnesia-calcium brick powder, 50 or below parts of 0-0.078 mm light-burnt magnesia powder, 6 or below parts of iron red, 1-3 parts of MgO micro-powder, 1-5 parts of alpha-Al2O3 micro-powder, 0.5-5 parts of ceramic fibers and 1-1.5 parts of titanium oxide. The fine magnesia-calcium brick powder, the light-burnt magnesia powder and the iron red are adopted as main raw materials, the alpha-Al2O3 micro-powder, MgO, rare earth oxide-containing ceramic fibers and titanium dioxide are added as auxiliary materials, and the fine magnesia-calcium brick powder is used to substitute parts of the light-burnt magnesia powder in the briquetting process; and a preparation technology of the ramming material has the advantages of simplicity, realization of the waste utilization of magnesia-calcium bricks, and improvement of the thermal shock stability and the erosion resistance of the above product.

Description

Technical field [0001] The present invention relates to the technical field of refractory materials, in particular to a MgO-CaO-Fe prepared from finely ground magnesia-calcium bricks 2 O 3 Ramming material for electric furnace Background technique [0002] Magnesium calcium iron (MgO-CaO-Fe 2 O 3 ) Quality dry ramming material is a refractory material mainly used to construct or repair the bottom of electric arc furnace. Magnesium-calcium iron ramming material has high density, high strength, strong erosion resistance, good volume stability and sintering performance. It has the advantages of being able to form a solid integral sintered layer at high temperature, long service life, simple construction, and not limited by the size of the furnace when used, so it has been widely used. [0003] The conventional magnesia-calcium-iron dry ramming material is composed of pre-synthesized magnesia-calcium-iron sand and sintered magnesia or fused magnesia according to a certain particle size...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/043
CPCC04B35/043C04B35/803C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3272C04B2235/3418C04B2235/5216C04B2235/5427C04B2235/77C04B2235/96C04B2235/9607
Inventor 于慧彬张义先董会彬陈东明金钊尹斌王健骁
Owner 辽宁利尔镁质合成材料股份有限公司
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