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Long-service-lifetime anti-erosion anti-stripping electric arc furnace cover and preparation method thereof

An anti-corrosion and anti-stripping technology, applied in furnaces, furnace components, lighting and heating equipment, etc., can solve the problems of short service life and easy peeling of electric arc furnace covers, and achieve stable heat capacity, thermal shock resistance, corrosion resistance, good effect

Pending Publication Date: 2020-10-23
郑州长虹耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the existing electric arc furnace covers all have the problems of short service life and easy peeling off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A long-life anti-corrosion and anti-stripping electric arc furnace cover, comprising the following raw materials in parts by weight: 30 parts of high alumina bauxite with a particle size of 0.1-30 mm and 30 parts of tabular alumina with a particle size of 0.1-10 mm Aggregate composed of 5 parts of 200-mesh magnesia-aluminum spinel powder, 3 parts of nano-sized alumina micropowder and 7 parts of platy corundum powder, 5 parts of binder, and 0.6 part of water reducing agent.

[0050] Its preparation method comprises the following steps:

[0051] Step 1: High alumina bauxite and platy corundum are densely packed to form an aggregate, and a powder consisting of magnesia-aluminum spinel powder, nano-scale alumina micropowder and platy corundum powder is added, and stirred for 1 minute;

[0052] Step 2, add water reducing agent and stir for 0.5 minutes;

[0053] Step 3, add the binder and stir for 6 minutes;

[0054] Step 4, assemble the mold, fix the motor hole in the tria...

Embodiment 2

[0061] A long-life anti-corrosion and anti-stripping electric arc furnace cover, comprising the following raw materials in parts by weight: 40 parts of high alumina bauxite with a particle size of 0.1-30 mm and 40 parts of tabular alumina with a particle size of 0.1-10 mm Aggregate composed of 8 parts of 200-mesh magnesia-aluminum spinel powder, 7 parts of nano-sized alumina micropowder and 10 parts of platy corundum powder, 8 parts of binder, and 0.9 parts of water reducing agent.

[0062] Its preparation method comprises the following steps:

[0063] Step 1: High alumina bauxite and platy corundum are densely packed to form an aggregate, and a powder composed of magnesia-aluminum spinel powder, nano-scale alumina micropowder and platy corundum powder is added, and stirred for 1.5 minutes;

[0064] Step 2, add water reducing agent and stir for 1 minute;

[0065] Step 3, adding the binder and stirring for 7 minutes;

[0066] Step 4, assemble the mold, fix the motor hole in t...

Embodiment 3

[0073] A long-life anti-corrosion and anti-stripping electric arc furnace cover, comprising the following raw materials in parts by weight: 33 parts of high alumina bauxite with a particle size of 0.1-30mm and 33 parts of tabular alumina with a particle size of 0.1-10mm The aggregate consists of 6 parts of 200-mesh magnesium-aluminum spinel powder, 4 parts of nano-scale alumina micropowder and 8 parts of platy corundum powder, 6 parts of binder, and 0.7 part of water reducing agent.

[0074] Its preparation method comprises the following steps:

[0075] Step 1: High alumina bauxite and platy corundum are densely packed to form an aggregate, and a powder composed of magnesia-alumina spinel powder, nano-scale alumina micropowder and platy corundum powder is added, and stirred for 2 minutes;

[0076] Step 2, add water reducing agent and stir for 1.5 minutes;

[0077] Step 3, adding the binder and stirring for 8 minutes;

[0078] Step 4, assemble the mold, fix the motor hole in ...

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Abstract

The invention discloses a long-service-lifetime anti-erosion anti-stripping electric arc furnace cover and a preparation method thereof, and relates to the technical field of electric arc furnace covers. The electric arc furnace cover comprises the following raw materials in parts by weight: aggregate composed of high bauxite and tabular corundum, magnesium aluminate spinel powder, powder composedof nanoscale aluminum oxide micro powder and tabular corundum powder, a binding agent and a water reducing agent. The electric arc furnace cover provided by the invention is good in thermal vibrationproperty and anti-stripping; the main raw material is the high-temperature sintered tabular corundum, and the purity is high and the refractoriness is 2000 degrees; the fused spinel powder has excellent thermal vibration property, and the chemical properties of the material are close to the properties of electric-arc furnace slag. The electric arc furnace cover is long in service lifetime, due tothe fact that the material is good in thermal vibration performance, resistant to erosion and stripping and capable of being organically combined with electric furnace slag in the using process and being attached to the lower surface of the electric arc furnace cover, the furnace cover material is stable in heat capacity and free of temperature fluctuation, the using effect is good, and the service lifetime is as long as 2000 heat.

Description

technical field [0001] The invention relates to the technical field of an electric arc furnace cover, in particular to a long-life anti-corrosion and anti-stripping electric arc furnace cover and a preparation method thereof. Background technique [0002] The initial electric arc furnace cover was built with phosphate bricks, and the general service life was about 100 furnaces. Due to the poor integrity of phosphate bricks, individual bricks were easy to loosen during use in the triangular area, causing the overall collapse, resulting in termination of use. [0003] The second-generation integral electric arc furnace generally adopts a water-cooled tube structure around the furnace cover. The electrode triangular area of ​​the furnace cover is prefabricated with castables, installed on the water-cooled ring, and used in combination. Due to the poor thermal shock and erosion resistance of the castable, the prefabricated triangular area of ​​the castable is easy to peel off as...

Claims

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Application Information

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IPC IPC(8): C04B35/66F27D1/18
CPCC04B35/66F27D1/18C04B2235/3217C04B2235/3222C04B2235/9607
Inventor 樊春霞秦振敏郑丽东
Owner 郑州长虹耐火材料有限公司
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