Production method of environment-friendly and energy-saving type regenerative magnesia-carbon brick

A production method and technology for magnesia-carbon bricks, which are applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as brick body cracking, achieve high utilization rate, low apparent porosity, and improve high temperature use. performance effect

Inactive Publication Date: 2010-10-06
吴钦合
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology makes better use of waste magnesia-carbon bricks and saves resources, but there are still deficiencies. Since AL powder is generally added to the production formula of magnesia-carbon bricks as an anti

Method used

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  • Production method of environment-friendly and energy-saving type regenerative magnesia-carbon brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A production method of environmentally friendly and energy-saving regenerated magnesia carbon bricks includes the following production steps:

[0029] (1) Choose and break. The waste magnesia-carbon bricks are sorted, the fire mud, residual steel, steel slag and other impurities on the surface are removed, broken, and magnetically separated.

[0030] (2) Powdering. Put it into an acid-resistant container, evenly spray and moisten it with a weakly acidic aqueous solution, let it stand for no less than 4 hours, and pass 100-110°C steam for pulverization treatment for no less than 3 hours.

[0031] (3) Dehydration and homogenization. The high temperature 800℃-850℃ drying treatment is not less than 6 hours to remove the structural water and make the aggregate and fine powder easy to separate; the electromagnetic resonance homogenization treatment keeps the raw material performance stable.

[0032] (4) Crushing, particle shaping, iron removal, and sieving to obtain three grade agg...

Embodiment 2

[0039] A production method of environmentally friendly and energy-saving regenerated magnesia carbon bricks includes the following production steps:

[0040] (1) Choose and break. The waste magnesia-carbon bricks are sorted, the fire mud, residual steel, steel slag and other impurities on the surface are removed, broken, and magnetically separated.

[0041] (2) Powdering. Put it into an acid-resistant container, evenly spray and moisten it with a weakly acidic aqueous solution, let it stand for no less than 4 hours, and pass 100-110°C steam for pulverization treatment for no less than 3 hours.

[0042] (3) Dehydration and homogenization. The high temperature 800℃-850℃ drying treatment is not less than 6 hours to remove the structural water and make the aggregate and fine powder easy to separate; the electromagnetic resonance homogenization treatment keeps the raw material performance stable.

[0043] (4) Crushing, particle shaping, iron removal, and sieving to obtain three grade agg...

Embodiment 3

[0050] A production method of environmentally friendly and energy-saving regenerated magnesia carbon bricks includes the following production steps:

[0051] (1) Choose and break. The waste magnesia-carbon bricks are sorted, the fire mud, residual steel, steel slag and other impurities on the surface are removed, broken, and magnetically separated.

[0052] (2) Powdering. Put it into an acid-resistant container, evenly spray and moisten it with a weakly acidic aqueous solution, let it stand for no less than 4 hours, and pass 100-110°C steam for pulverization treatment for no less than 3 hours.

[0053] (3) Dehydration and homogenization. The high temperature 800℃-850℃ drying treatment is not less than 6 hours to remove the structural water and make the aggregate and fine powder easy to separate; the electromagnetic resonance homogenization treatment keeps the raw material performance stable.

[0054] (4) Crushing, particle shaping, iron removal, and sieving to obtain three grade agg...

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Abstract

The invention discloses a production method of an environment-friendly and energy-saving type regenerative magnesia-carbon brick, comprising the following production steps: (1) sorting and crushing waste magnesia-carbon bricks; (2) powdering with weak acid aqueous solution; (3) carrying out high-temperature drying to dehydrate and electromagentic resonance to homogenize; (4) carrying out crushing, particle shaping, iron removing and screening; (5) mixing materials: mixing regenerative aggregates, fine powder and newly-added and electrically-fused magnesite aggregates, and fine powder; and (6)forming. The mixed material is added with a bonding agent, is treated by high-speed constant-temperature mixing, hydraulic forming and electric heating drying and obtains a regenerative magnesia-carbon brick product. The production method solves the problem that the product in the prior art has unstable performance, can retain usable components such as electrically-fused magnesite, crystalline flake graphite and the like in the raw material furthest, has high recovery and utilization rate and is energy-saving and environment-friendly.

Description

Technical field [0001] The invention relates to a method for recycling refractory materials, in particular to a method for producing environmentally friendly and energy-saving recycled magnesia carbon bricks. Background technique [0002] At present, magnesia-carbon bricks are widely used as refractory materials in steel smelting production, and are generally used as lining bricks for ladle. my country is a big country in iron and steel. The annual consumption of magnesia carbon bricks reaches more than 2 million tons, and the discarded magnesia carbon bricks reach more than 600,000 tons. Most of these refractories after use are treated as garbage, and only a small amount is roughly used, which is not only a waste Resources and pollute the environment. Some domestic steel mills put used magnesia carbon bricks on converters and electric furnace linings to reduce the consumption of refractory materials. Some use waste magnesia carbon bricks to be processed into pellets as electric ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B18/16
CPCY02W30/91
Inventor 吴珂韩卫东陈忠刚张继强
Owner 吴钦合
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