A preparation method of large fabric for converter repairing

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: 2015-09-16
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

[0004] 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
[0005] 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
[0006] 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

[0025] 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%.

[0026] Among them, regenerated magnesia-carbon brick materials with a particle size of 0.3-1mm: 15wt%; regenerated magnesia-carbon brick materials 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, excluding 1mm) regenerated 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...

Embodiment 2

[0042] 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%.

[0043] The preparation method of the large fabric for converter repairing is similar to that of Example 1.

[0044] Under the condition of 110°C*24h for the large fabric produced by this formula and method, the values ​​of each parameter are: MgO≥65%C≥8%SiO 2 ∠8%SiC∠6% Bulk density≥2.0g / cm 3 The refractoriness of the product is ≥1730℃.

Embodiment 3

[0046] 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%.

[0047] The preparation method of the large fabric for converter repairing is similar to that of Example 1.

[0048] Under the condition of 110°C*24h for the large fabric produced by this formula and method, the values ​​of each parameter are: MgO≥45%C≥8%SiO 2 ∠8%SiC∠6% Bulk density≥2.0g / cm 3 The refractoriness of the product is ≥1730℃.

[0049] 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 preparation method of a large-area material for converter fettling, which adopts regenerated magnesia carbon bricks, regenerated silicon carbide and high-iron magnesia as main raw materials, and prepares the material by crushing and sieving regenerated magnesia carbon bricks, regenerated silicon carbide and high-iron magnesia, adding high temperature asphalt, urotropine and caprolactam, and fully stirring. When used in converter equipment, the large-area material for converter fettling prepared by the formula has the advantages of high adhesive rate, good anti-stripping performance, high sintering speed, erosion resistance, scouring resistance, and low high temperature expansion, and has an adhesive rate of more than 95%. The raw material of magnesia is rich in ore resources; the auxiliary raw materials are available everywhere; the formula is simple; the raw material stock-holding cost is decreased; the high adhesive rate of the product not only realizes the reduction of production cost, but also reduces adverse influence of residues on molten steel. Meanwhile, the work intensity is decreased; the construction progress is accelerated; the fettling time is shortened; the furnace service life is prolonged; and the consumption of refractory materials is reduced.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to large fabrics for converter repairing. Background technique [0002] 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. [0003] At present, there are many kinds of products for converter repairing large fabrics. Although they all have certain repairing effects, there are many deficiencies in their use time, raw material costs, and sinterability. The details are as follows: [0004] 1. Long sintering time: The large fabric used for repairing the furnace currently used in steelmaking generally feeds 0.8-1.5 tons at a time, and the sintering time takes 100-180 minutes, which seriously affects the production requirements. [0005] 2. Most of the raw materials used are magnesia or forsterite, which consume a lot ...

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 Patents(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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