Hot repair mat for molten iron desulphurization

A hot repair and hot metal desulfurization technology, applied in the field of hot repair materials, can solve problems such as poor thermal shock stability, affecting the service life of desulfurization equipment, and unstable quality

Inactive Publication Date: 2013-07-03
SHANGHAI BAOMING REFRACTORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the desulfurization treatment of molten iron, no matter whether spray gun injection or KR stirring paddle stirring desulfurization is adopted, it must withstand the erosion, erosion and frequent rapid cooling and rapid temperature changes of high-temperature molten iron, which will eventually lead to cracking, peeling and wear of the refractory lining Such damage seriously affects the service life of the desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Prepare 100kg of hot repairing material, the components of the repairing material are by weight percentage: high alumina bauxite clinker: 5-3mm15kg, 3-1mm25kg, 1-0mm10kg, <180 mesh 13kg; special-grade burnt gem: 1-0mm5kg, < 180 mesh 5kg; silicon carbide: 10kg; alumina superfine powder: 4kg; bonded clay: 10kg; expansion agent: 8kg; aluminum sulfate solution: 15kg; sodium hexametaphosphate: 0.5-1.5kg; preservative: 0.5-1.5( any one or more of oxalic acid, borax, and sodium tricerate).

[0042] The repair material of the invention has the characteristics of good high-temperature adhesion performance, high bonding strength, good thermal shock stability and corrosion resistance.

Embodiment 2

[0044]Prepare 100kg of hot repair material, the components of the repair material are by weight percentage: high alumina bauxite clinker: 5-3mm10kg, 3-1mm22kg, 1-0mm5kg, <180 mesh 17kg; super burnt gem: 1-0mm18kg, < 180 mesh 6kg; silicon carbide: 5kg; alumina superfine powder: 8kg; bonded clay: 5kg; expansion agent: 4kg; aluminum sulfate solution: 10kg; sodium hexametaphosphate: 0.5-1.5kg; preservative: 0.5-1.5( any one or more of oxalic acid, borax, and sodium tricerate).

[0045] The repair material of the invention has the characteristics of good high-temperature adhesion performance, high bonding strength, good thermal shock stability and corrosion resistance.

Embodiment 3

[0047] Prepare 100kg of hot repair material, the components of the repair material are by weight percentage: high alumina bauxite clinker: 5-3mm6kg, 3-1mm31kg, 1-0mm11kg, <180 mesh 10kg; super burnt gem: 1-0mm7kg, < 180 mesh 9kg; silicon carbide: 7kg; alumina superfine powder: 6kg; bonded clay: 7kg; expansion agent: 6kg; aluminum sulfate solution: 12kg; aluminum dihydrogen phosphate solution: 2kg; sodium hexametaphosphate: 0.5-1.5kg ; Preservative: 0.5-1.5 (any one or several of oxalic acid, borax, and sodium tricerate).

[0048] The repair material of the invention has the characteristics of good high-temperature adhesion performance, high bonding strength, good thermal shock stability and corrosion resistance.

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PUM

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Abstract

The invention aims to disclose a hot repair mat for molten iron desulphurization, which comprises the following components in percentage by weight: 10 to 24 percent of special-grade flint clay, 40 to 54 percent of bauxite chamotte, 5 to 10 percent of silicon carbide fine powder, 4 to 8 percent of alumina submicron powder, 5 to 10 percent of binding clay, 4 to 8 percent of expanding agent, 0.5 to 1.5 percent of additive and 10 to 15 percent of additional bonding agent. Compared with an existing product, the hot repair mat for molten iron desulphurization has the technical characteristics of good high temperature adhesivity, high bonding strength, good thermal shock resistance, antistrip performance, resistance to erosion and wear, good plasticity and the like, can meet the requirement of different molten iron desulphurization equipment on rapid hot repair, adopts easily obtained raw materials, is low in cost, has a long service life and fulfills the aim of the invention.

Description

technical field [0001] The invention relates to a hot-state repairing material, in particular to a hot-state repairing material for hot-metal desulfurization used in the field of hot-state repairing of molten iron desulfurization equipment in the field of refractory materials for hot metal desulfurization pretreatment. Background technique [0002] Due to changes in market demand, higher requirements are placed on steel types. In order to improve the competitive advantage, many enterprises at home and abroad pre-treat the molten iron before steelmaking to reduce the sulfur and other impurities in the molten steel to reduce the pressure of converter steelmaking, and constantly optimize the iron and steel smelting technology to achieve low cost and high profit, thereby improving steel products final quality. [0003] As the two main modes of hot metal pretreatment, lance injection and KR stirring paddle desulfurization have been widely promoted and applied. In the desulfuriz...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 黄先德李家斌刘娟
Owner SHANGHAI BAOMING REFRACTORIES CO LTD
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