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Large fabric for repairing furnace

A technology for large fabrics and furnace repairing, applied in the field of metallurgy, can solve problems such as unfavorable promotion and application of large fabrics, consumption of large mineral resources, affecting production requirements, etc., and achieve the effects of shortening furnace repairing time, reducing inventory costs, and prolonging service life.

Active Publication Date: 2015-07-15
浙江攀盛冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Long sintering time: The large fabric used for repairing furnaces in current steelmaking generally feeds 0.8-1.5 tons at a time, and the sintering time takes 100-180 minutes, which seriously affects production requirements
[0006] 2. Most of the raw materials used are magnesia or forsterite, which consume a lot of mineral resources, which is not conducive to energy saving and environmental protection, but also has a high cost, which is not conducive to the promotion and application of large fabrics
[0007] 3. The technology is immature: the service life of a repair furnace is about 10 hours

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Large fabric for converter repairing, the mass percentage of each component is: recycled magnesia carbon: 23wt%; high-iron magnesia: 30wt%; regenerated silicon carbide: 27wt%; : 3wt%.

[0019] Among them, regenerated magnesia-carbon bricks with a particle size of 0.3-1mm: 15wt%; regenerated magnesia-carbon bricks with a particle size of 0.088mm: 8wt%; high-iron magnesia with a particle size of 1-3mm (including 1mm and 3mm): 14wt%; high iron magnesia with a particle size of 0.3-1mm (including 0.3mm, excluding 1mm): 16wt%, regenerated silicon carbide material with a particle size of 1-3mm (including 1mm and 3mm): 12wt%; a particle size of 0.3 ~ 1mm (including 0.3mm, not including 1mm) recycled silicon carbide material: 15wt%, the high-iron magnesia uses 90% high-iron magnesia, namely: Ti 2 o 3 High-iron magnesia with a content of +MgO greater than or equal to 90% of the total weight. High-temperature asphalt adopts high-temperature asphalt, that is, hard asphalt with a...

Embodiment 2

[0035] Among them, the mass percentage of each component of the large fabric for converter repairing is: regenerated magnesia carbon: 20wt%; high-iron magnesia: 32wt%; regenerated silicon carbide: 25wt%; Caprolactam: 5 wt%.

[0036] The preparation method of the large fabric for converter repair is similar to that of Example 1.

[0037] Under the condition of 110°C*24h for the large fabric produced by this formula and method, each parameter value is: MgO≥65%C≥8%SiO 2 ∠8% SiC∠6% Bulk density ≥ 2.0g / cm 3 The refractoriness of the product is ≥1730℃.

Embodiment 3

[0039] Among them, the mass percentage of each component of the large fabric for converter repairing is: regenerated magnesia carbon: 25wt%; high-iron magnesia: 28wt%; regenerated silicon carbide: 30wt%; Caprolactam: 2 wt%.

[0040] The preparation method of the large fabric for converter repair is similar to that of Example 1.

[0041] Under the condition of 110°C*24h for the large fabric produced by this formula and method, each parameter value is: MgO≥45%C≥8%SiO 2 ∠8% SiC∠6% Bulk density ≥ 2.0g / cm 3 The refractoriness of the product is ≥1730℃.

[0042] The above-mentioned large fabric for converter repairing can feed 0.8 to 1.5 tons at a time, sintering is fast, the sintering time is about 45 to 75 minutes, and the longest service life of repairing furnace can reach more than 30 hours.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a large fabric for fettling of a converter. The large fabric is prepared from the following components in percentage by mass: 20-25 percent of regenerated magnesia carbon, 28-32 percent of high-iron magnesia, 25-30 percent of regenerated silicon carbide, 12-18 percent of high-temperature asphalt, 1-3 percent of methenamine and 2-5 percent of caprolactam. According to the large fabric for the fettling of the converter, the regenerated magnesia carbon tile, regenerated silicon carbide and high-iron magnesia are used as main raw materials and crushed and screened, and then the high-temperature asphalt, methenamine and caprolactam are added into the former raw materials and fully stirred to obtain the large fabric. The large fabric for the fettling of the converter has the advantages of high adhesive rate, high anti-stripping performance, high sintering speed, high corrosion resistance, high anti-scouring property, small high-temperature expansibility when being used in converter equipment, and the adhesive rate is up to more than 95 percent.

Description

[0001] The patent application of the present invention is a divisional application of the invention title "a large fabric for converter repairing". The application date of the original application is April 10, 2014, and the application number is 2014101417943. technical field [0002] The invention relates to the field of metallurgy, in particular to large fabrics for converter repairing. Background technique [0003] Converter steelmaking equipment, due to long-term work in a high-temperature environment, has very serious wear and tear. Therefore, after a period of use, it must be repaired with repair materials to meet the needs of normal use. [0004] At present, there are many kinds of products for converter repairing large fabrics. Although they all have a certain repairing effect, there are many deficiencies in their use time, raw material cost, and sinterability. The details are as follows: [0005] 1. Long sintering time: The large fabric used for repairing the furnac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 于琪芳江群英
Owner 浙江攀盛冶金材料有限公司
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