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Refractory fettling material

A furnace charging and refractory technology, applied in the field of charging charging, can solve problems such as unfavorable large-area flow charging, damage to the health of employees, long sintering time, etc., to improve the sintering strength and adhesion, reduce the consumption of refractory materials, and reduce the sintering time. short effect

Inactive Publication Date: 2013-06-19
JIYUAN CITY HENGDA DURABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are the following defects: 1. A large amount of smoke is generated during use, which pollutes the environment extremely and damages the health of employees.
2. The sintering time is long, generally more than 80 minutes
3. Poor fluidity, which is not conducive to large-area flow repairing

Method used

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  • Refractory fettling material
  • Refractory fettling material
  • Refractory fettling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take magnesia: aggregate 60Kg, fine powder: 2Kg; liquid pitch: 5Kg; sodium hexametaphosphate: 1Kg; caprolactam 1Kg; potassium nitrate 5Kg, iron oxide 10Kg, and calcium phosphate 10Kg. Put the magnesia aggregate into the mixer, heat it to 80oC, stir for 10 minutes, add liquid asphalt, stir evenly, then add other raw materials, stir for 5 minutes, and then discharge the material evenly, the thickness does not exceed 20cm, and then crush it after cooling No more than 15cm. Inspection and packaging to get the finished product.

Embodiment 2

[0033] Take magnesia: aggregate 80Kg, fine powder: 10Kg; liquid pitch: 10Kg; sodium hexametaphosphate: 5Kg; caprolactam 4Kg; potassium nitrate 10Kg, iron oxide 20Kg, and calcium phosphate 30Kg. Put the magnesia aggregate into the mixer, heat it to 80oC, stir for 10 minutes, add liquid asphalt, stir evenly, then add other raw materials, stir for 5 minutes, and then discharge the material evenly, the thickness does not exceed 20cm, and then crush it after cooling No more than 15cm. Inspection and packaging to get the finished product.

Embodiment 3

[0035] Take magnesia: aggregate 75Kg, fine powder: 10Kg; liquid pitch: 7Kg; sodium hexametaphosphate: 3Kg; caprolactam 2Kg; smoke suppressant: potassium nitrate 10Kg, iron oxide 20Kg, and calcium phosphate 25Kg. Put the magnesia aggregate into the mixer, heat it to 80oC, stir for 10 minutes, add liquid asphalt, stir evenly, then add other raw materials, stir for 5 minutes, and then discharge the material evenly, the thickness does not exceed 20cm, and then crush it after cooling No more than 15cm. Inspection and packaging to get the finished product.

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PUM

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Abstract

The invention discloses a refractory fettling material, which is prepared by the following raw materials in parts by weight: 60-80 parts of magnesia aggregate, 5 ~ 20 parts of magnesia powder; 5-10 parts of asphalt; 1-5 parts of hexametaphosphate sodium; 1-4 parts of caprolactam; 5-15 parts of potassium nitrate, 10-30 parts of iron oxide, and 10-30 parts of calcium phosphate. The beneficial effects of the refractory fettling material are as follows: 1, the production of black smoke is eliminated, meeting environmental protection requirements; 2, the sintering time is short, which is about 20 minutes; 3, the fluidity is good, and especially at a high temperature (above 1000 DEG C), the charge can flow to fill any gaps; 4, and the refractory fettling material has no any restrictions for storage time.

Description

Technical field [0001] The invention relates to the technical field of refractory materials for converters in steelmaking plants, in particular to a charge for repairing furnaces. Background technique [0002] The converter has used magnesia-carbon bricks since the 1980s. After partial damage, the slag line, trunnion and other parts were sprayed and repaired. In the past few years, the slag splashing technology was introduced from abroad, which greatly improved the life of the converter. However, due to the harsh smelting conditions, especially when molten iron and scrap are loaded, the mechanical impact and erosion on the large surface of the converter will cause local damage and cause the converter lining life to be out of sync. In order to meet the needs of converter slag splashing and temporary repair in steel mills, our company has developed an environmentally friendly repair material suitable for converter smelting strength and production rhythm to be greatly improved after...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 晁霞
Owner JIYUAN CITY HENGDA DURABLE MATERIAL
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