Electric furnace bottom ramming mass

A technology of ramming material and furnace bottom, which is applied in the field of refractory materials, can solve the problems of reduced erosion resistance, unstable product quality, and reduced durability, and achieve the effects of increased strength, easy control of product quality, and promotion of continuous hydration

Active Publication Date: 2014-10-01
河南竹林耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, magnesia-calcium-iron sand contains a certain amount of CaO, which is easy to hydrate during storage, which will also cause unstable product quality, resulting in products that are not resistant to erosion, erosion resistance, and durability during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The ramming material at the bottom of the electric furnace of the present invention is represented by weight percentage, and the raw material composition of the ramming material is: 40% of fused magnesia aggregate of 5-3mm, 10% of fused magnesia aggregate of 3-1mm %, 1-0mm fused magnesia aggregate 25%, <88μm fused magnesia fine powder 25%; in addition, add brine binder accounting for 4% of the total weight of the above raw materials.

Embodiment 2

[0022] The ramming material at the bottom of the electric furnace of the present invention is represented by weight percentage. The raw material composition of the ramming material is: 20% of fused magnesia aggregate of 5-3mm, 25% of fused magnesia aggregate of 3-1mm %, 1-0mm fused magnesia aggregate 25%, <88μm fused magnesia fine powder 30%; in addition, add brine binder accounting for 6% of the total weight of the above raw materials.

Embodiment 3

[0024] The ramming material at the bottom of the electric furnace of the present invention is represented by weight percentage. The raw material composition of the ramming material is: 40% of high-purity magnesia aggregate of 5-3mm, 15% of high-purity magnesia aggregate of 3-1mm, 1-3mm of high-purity magnesia aggregate 0mm high-purity magnesia aggregate 15%, <88μm high-purity magnesia fine powder 30%; additionally add brine binder accounting for 6% of the total weight of the above raw materials.

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PUM

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Abstract

The invention discloses an electric furnace bottom ramming mass. The electric furnace bottom ramming mass contains the following raw materials in percentage by weight: 20-40% of 5-3mm fused magnesite or high-purity magnesite aggregate, 10-25% of 3-1mm fused magnesite or high-purity magnesite aggregate, 15-25% of 1-0mm fused magnesite or high-purity magnesite aggregate and 20-30% of <88 mu m fused magnesite fine powder or high-purity magnesite fine powder. Brine, which accounts for 4-6 wt% of the raw materials, is also added as a binder. The raw materials for producing the ramming mass combined with the brine are stable and easy to store. The ramming mass production process is simple, and the product quality is easy to control. The ramming mass has high MgO content, low impurity content, high fire resistance and higher corrosion resistance, and the service life can be prolonged from more than two hundred times to more than five hundred times in the electric furnace use process.

Description

Technical field [0001] The present invention involves the field of refractory materials, especially in the bottom of the electric furnace. Background technique [0002] Traditional electric furnaces generally use magnesium calcium iron sand as the main raw materials, and add a small amount of iron oxide as sintered agent to promote the sintering of magnesium and calcium dry mounds at high temperature.The separated CAO in the iron oxide and magnesium calcium iron sand reacts at high temperature to generate ironic acid di calcium (2CAO.FE 2 O 3 C 2 F).C 2 The melting point of F is 1449 ° C. Under the conditions of the existence of iron liquid, the liquid temperature is about 1100 ° C.At the same time, magnesium calcium iron sand also contains AL 2 O 3、 SIO 2 For impurities, the temperature of the liquid phase is lower than that of 1100 ° C.The lower the temperature of the liquid phase, the worse the corrosion performance of the pounding the feed, and the durability of durability is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李志强刘飞飞彭从华马杰
Owner 河南竹林耐材有限公司
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