Slagging agent for high-temperature oriented silicon steel heating furnace and preparation method of slagging agent

A technology for oriented silicon steel and slag agent, applied in the field of metallurgical industrial furnaces, can solve the problems of complex composition, high melting point, low heating capacity, etc., and achieve the effects of reducing reaction activity, reducing melting point of slag and reducing production efficiency

Inactive Publication Date: 2014-12-17
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, due to the further oxidation of the liquid slag deposited on the bottom of the furnace through the further oxidation of the furnace atmosphere and its erosion reaction to the refractory material of the heating furnace, a slag with a high melting point and complex composition is gradually formed, resulting in the continuous increase in the viscosity of the slag and the liquid state. The slag output is far below the design level of 40%, and the actual cycle heating of high-temperature oriented silicon steel is also lower than the design level

Method used

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  • Slagging agent for high-temperature oriented silicon steel heating furnace and preparation method of slagging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a high-temperature oriented silicon steel heating furnace slag agent:

[0031] 1) Weigh 18g of white sandstone, 25g of spodumene, 5g of active lime, 2g of instant powdered natron, 40g of fluorite, 5g of soda ash and 5g of borax, and add them to the mixer for stirring and dry mixing. Mix until uniform, get component B, set aside;

[0032] 2) Weigh 20g of charcoal and 80g of component B;

[0033] 3) Spray water to wet the charcoal, then gradually add wet charcoal and component B into the rotating disc pelletizer, and use charcoal as the core to cooperate with component B on the outer layer to make pellets;

[0034] 4) Dry the pellets obtained in step 3) to obtain a slagging agent with a particle size of 3-8 mm.

[0035] The diameter of charcoal particles is 2-5 mm, which can be purchased in the market; the SiO2 of white sandstone 2 Content ≥ 80%, particle size ≤ 0.15mm, origin is Jiangxia District, Wuhan City; Li 2 O content ≥ 0.75%, particle s...

Embodiment 2

[0037] Another preparation method of high temperature oriented silicon steel heating furnace slag agent:

[0038] 1) Weigh 25g of white sandstone, 18g of spodumene, 3g of active lime, 4g of instant powdered natron, 35g of fluorite, 10g of soda ash and 5g of borax, and add them to the mixer for stirring and dry mixing. Mix until uniform, get component B, set aside;

[0039] 2) Weigh 80g of coke and 20g of component B;

[0040] 3) Wet the coke with water, then gradually add the wet coke and component B into the rotating disc pelletizer, and use the coke as the core to cooperate with the outer component B to make pellets;

[0041] 4) Dry the pellets obtained in step 3) to obtain a slagging agent with a particle size of 3-8 mm.

[0042] The diameter of coke particles is 2-5mm, which is broken coke from the coking plant of iron and steel enterprises; SiO2 of white sandstone 2 Content ≥ 80%, particle size ≤ 0.15mm, origin is Jiangxia District, Wuhan City; Li 2 O content ≥ 0.75%, p...

Embodiment 3

[0044] The preparation method of the third high temperature oriented silicon steel heating furnace slag agent:

[0045] 1) Weigh 22g of white sandstone, 25g of spodumene, 4g of active lime, 3g of instant powdered natron, 38g of fluorite, 6g of soda ash and 2g of borax, and add them to the mixer for stirring and dry mixing. Mix until uniform, get component B, set aside;

[0046] 2) Weigh 40g of coke and 60g of component B;

[0047] 3) Wet the coke with water spray, then gradually add the wet coke and component B into the rotating disc pelletizer, and use the coke as the core to cooperate with the outer component B to make pellets;

[0048] 4) Dry the pellets obtained in step 3) to obtain a slagging agent with a particle size of 3-8mm.

[0049] The diameter of coke particles is 2-5mm, which is broken coke from the coking plant of iron and steel enterprises; SiO2 of white sandstone 2 Content ≥ 80%, particle size ≤ 0.15mm, origin is Jiangxia District, Wuhan City; Li 2 O conten...

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Abstract

The invention discloses a slagging agent for a high-temperature oriented silicon steel heating furnace and a preparation method of the slagging agent. The slagging agent is particles which are formed by wrapping a core component A with an outer layer component B. The slagging agent comprises the components in percentage by weight: 20-80 percent of component A and 20-80 percent of component B, wherein the component A is carbon particles; the component B consists of the following components in percentage by weight: 18-25 percent of limbra stone, 18-25 percent of spodumene, 3-5 percent of active lime, 2-4 percent of sodium silicate, 35-40 percent of fluorite, 5-10 percent of soda and 2-5 percent of borax. The method comprises the following steps: spraying water to wet the component A; granulating in a matching manner by taking the component A as a core and the component B as an outer layer to obtain the slagging agent. The slagging agent has the advantages of low raw material price, wide source, easiness in preparation, convenience for use, superior performance and the like.

Description

technical field [0001] The invention relates to the field of metallurgical industrial furnaces, in particular to a slag-removing agent for a high-temperature oriented silicon steel heating furnace and a preparation method thereof. Background technique [0002] The high-temperature heating furnace temperature of conventional steel hot-rolling walking heating furnace in iron and steel enterprises is about 1250°C, and the heating time in the furnace is about 110 minutes. The oxide scale formed by heating in the billet furnace is less, and the shedding of solid oxide scale in the furnace is less Therefore, it takes a long time for the accumulation of scale and slag on the bottom of the furnace to affect the normal combustion of the lower burner of the heating furnace, generally 6 to 9 months. When the heating furnace is shut down for minor repairs, the slag is manually removed and the heating is resumed. The effective volume and thermal performance of the furnace. For high-temp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 欧阳德刚罗安智李明晖
Owner 武汉钢铁有限公司
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