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Environment-friendly RH refining furnace lining brick and preparation method thereof

An environmentally friendly, refining furnace technology, applied in the field of RH refining furnace lining bricks, can solve the problems of not meeting the use conditions of RH vacuum furnaces, difficult industrial production, poor slag resistance, etc., to eliminate environmental hazards, strong alkaline and acid slag Erosion, high degree of graphitization effect

Inactive Publication Date: 2014-02-26
鞍山市量子炉材集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Due to the previous RH vacuum furnace lining without chromium products or products fired at high temperature, the energy consumption is large and the cost is high
Either raw materials are scarce, it is difficult to realize industrial production, or the product has poor slag resistance and cannot meet the harsh operating conditions of RH vacuum furnaces, so it cannot be widely promoted as a chromium-free product for RH vacuum furnace linings

Method used

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  • Environment-friendly RH refining furnace lining brick and preparation method thereof
  • Environment-friendly RH refining furnace lining brick and preparation method thereof
  • Environment-friendly RH refining furnace lining brick and preparation method thereof

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Embodiment Construction

[0078] The present invention will be further described below in conjunction with embodiment.

[0079] According to the environment-friendly type RH refining furnace lining brick of the present invention, it is made up of the raw material component of following percentage by weight:

[0080] Magnesia 54~81%,

[0081] Magnesium aluminum spinel superfine powder 18~35%,

[0082] α-alumina superfine powder 0.5~9.5%,

[0083] Modified graphite 0.5~1.5%,

[0084] Taking the total of the above raw material components as 100%, and then adding 3 to 5% by weight of aluminum sulfate as a binder,

[0085] The weight percentage of the MgO content in the magnesia is ≥85%, and the bulk density is ≥3.02g / cm 3 , particle size≤5mm,

[0086] Al in the described magnesium aluminum spinel superfine powder 2 o 3 The weight percentage of content ≥ 76%, the weight percentage of MgO content ≥ 22%, the weight percentage of impurity content ≤ 2%, the median diameter D50 ≤ 2um,

[0087] Al of...

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Abstract

The invention relates to an environment-friendly RH refining furnace lining brick and a preparation method thereof. The environment-friendly RH refining furnace lining brick is prepared from the following raw materials in percentage by weight: 54-81% of magnesite, 18-35% of magnesium aluminate spinel ultra-fine powder, 0.5-9.5% of alpha-aluminium oxide ultra-fine powder and 0.5-1.5% of modified graphene, wherein the sum of the percentage by weight of the raw materials is 100%; in addition, the environment-friendly RH refining furnace lining brick also comprises 3-5% by weight of aluminium sulfate serving as a binding agent. The preparation method comprises the following steps: weighing the raw materials in proportions, and premixing the raw materials with the particle size of less than or equal to 0.088mm so as to obtain a premixed material; then stirring the raw materials with the particle size of more than 0.088mm for 3-5 minutes, adding the aluminium sulfate binding agent and stirring for 3-6 minutes, adding the premixed material and stirring for 6-15 minutes, carrying out compression molding under the pressure of 100-300MPa, and finally carrying out heat treatment in an electric heating dry kiln at the temperature of 100-300 DEG C, thus forming the RH vacuum furnace lining brick. The preparation method has the advantages that the non-chromizing of a lining of RH vacuum smelting equipment is realized, the environment hidden danger caused by a chrome-containing refractory lining is eliminated, and the environment-friendly RH refining furnace lining brick with the good performance can be prepared.

Description

technical field [0001] The invention relates to the technical field of RH refining furnace lining bricks, in particular to an environment-friendly RH refining furnace lining brick and a preparation method thereof. Background technique [0002] RH furnace is the most commonly used equipment in the secondary refining technology. Using RH vacuum degassing method to carry out secondary refining of molten steel can improve the quality of steel, strictly control the composition of chemical elements, and improve production efficiency. It is an effective means to improve the quality and performance of steel products in the steelmaking process. [0003] Because the RH furnace works in the environment of high temperature, vacuum, and frequent temperature rise and fall, the requirements for the lining refractory are very high. It not only requires high temperature resistance, but also requires good slag resistance, thermal shock resistance and resistance flushing performance, etc. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 闫丽娟马晓明
Owner 鞍山市量子炉材集团有限公司
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