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Magnesium-calcium ramming material produced from waste refractory materials and its manufacturing method

A technology for discarding refractory materials and ramming materials, applied in the field of environmental protection materials, can solve the problems of substandard discharge, environmental pollution of iron and steel, shortage of high-quality refractory raw materials, etc., to reduce costs, improve thermal shock stability, and reduce hydration erosion. Effect

Active Publication Date: 2020-06-09
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly magnesium-calcium plastic (ramming) material produced from waste refractory materials, which can not only improve the comprehensive metallurgical performance of the furnace charge, solve the problems of environmental pollution in steel and refractory enterprises, and discharge standards. Solve the shortage of high-quality refractory raw materials and save costs

Method used

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  • Magnesium-calcium ramming material produced from waste refractory materials and its manufacturing method
  • Magnesium-calcium ramming material produced from waste refractory materials and its manufacturing method
  • Magnesium-calcium ramming material produced from waste refractory materials and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Electric furnace bottom ramming material, furnace slope repair material

[0023] The used magnesia-iron bricks recovered by the cement plant are broken into 5mm particle size materials after removing the metamorphic layer, and the waste magnesia-iron brick aggregates are obtained;

[0024] The used magnesia-calcium bricks recovered from the steel mill are broken into 5mm particle size materials after removing the steel slag to remove the metamorphic layer, and the aggregate of the waste magnesia-calcium bricks is obtained;

[0025] Crush the synthetic magnesia-calcium-iron sand produced by the company into 0-8㎜ grain size material to obtain high-calcium and low-iron magnesia aggregate;

[0026] The used high-purity or mid-grade magnesia bricks recovered from the glass factory are finely ground into fine powder with a particle size of ≦0.074mm to obtain waste magnesia brick fine powder,

[0027] The fine powder of the iron oxide powder particle size of 0.0...

Embodiment 2

[0035] Embodiment 2: GOR furnace bottom joint material, converter live furnace bottom joint material, AOD furnace bottom masonry material

[0036] The raw materials used and the preparation method are the same as in Example 1, and the proportioning ratio is as follows.

[0037]

[0038]

[0039] According to the requirements and technical conditions of GOR furnace bottom joint material, converter live furnace bottom joint material, and AOD furnace bottom masonry material, sample 1 has the highest bulk density and compressive strength when heated to 450°C, while the traditional material sample is the lowest , by percentage, the formula data used is: waste magnesia-iron brick aggregate 5%, waste magnesia-calcium brick aggregate 78%, high-calcium and low-iron magnesia aggregate 5%, waste mid-grade magnesia brick fine powder 5%, waste iron Powder 0.5%, sodium sulfate 0.5%, sodium carbonate 0.5%, and organic binder 7% are mixed evenly to make environmentally friendly magnesiu...

Embodiment 3

[0040]Example 3: Environment-friendly magnesia-calcium plastic (ramming) material for AOD furnace, GOR furnace, back seam of ordinary converter, and furnace mouth

[0041] The raw materials used and the preparation method are the same as in Example 1, and the proportioning ratio is as follows.

[0042]

[0043]

[0044] According to the requirements and technical conditions of AOD furnace, GOR furnace, converter back seam and furnace mouth, the required volume density / (g / cm 3 ) ≥ 2.4, 1600°C change in reburning line / (%) ≤ -1.3, sample 3 has the highest bulk density, and the lowest change in reburning line, by percentage, the formula data used is: waste high-purity magnesia brick fine powder is 25%, Waste magnesia iron brick aggregate 22.3%, waste magnesia calcium brick aggregate 35%, high calcium and low iron magnesia aggregate 15%, waste iron powder 0.5%, sodium sulfate 0.4%, sodium carbonate 0.3%, organic binder 1.5% After mixing evenly, it is made into an environment...

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Abstract

The invention belongs to the field of environment-friendly materials and particularly relates to a Magnesia-calcia ramming material prepared from a waste refractory material and a preparing method ofthe magnesite-dolomite ramming material. The ramming material is prepared from components in percentage by weight as follows: 5%-40% of waste magnesia-iron brick aggregate, 25%-80% of waste magnesia-calcium brick aggregate, 5%-25% of waste fine magnesia brick powder, 5%-23% of high-calcium and low-iron magnesia aggregate, 0.5%-1.5% of ultrafine iron oxide red powder, 0.2%-0.5% of sodium sulfate, 0.2%-0.5% of sodium carbonate and 0.5%-0.7% of an organic binder. The comprehensive metallurgical performance of furnace charge can be improved, the problems of environmental pollution of steel and refractory material manufacturers, substandard emission and the like are solved, the problem of shortage of high-quality refractory materials can be solved, and cost can be saved.

Description

technical field [0001] The invention belongs to the field of environment-friendly materials, and in particular relates to an environment-friendly magnesium-calcium plastic (ramming) material produced from waste refractory materials and a manufacturing method thereof. Background technique [0002] In recent years, the iron and steel industry has been focusing on low energy consumption technology, low emission technology in the steel manufacturing process, and the development of high value-added steel materials that promote the adjustment of the variety structure. These new technologies and new processes require corresponding technical support for refractory materials. my country It will focus on the development of refractory materials with "high-quality longevity, functionalization, energy saving and environmental protection, and recycling". With the increase in the output and variety of stainless steel, higher requirements are put forward for refractory materials for furnace l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/043C04B35/622C04B35/63
Inventor 崔学正崔申马会张海峰付伟刘冲高刚
Owner LIAONING ZHONGMEI HLDG
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