Gunning mix for converter

A gunning material and formula technology, applied in the field of refractory materials, can solve the problems of poor corrosion resistance, high material price, not resistant to erosion, etc., and achieve the effect of fast sintering, saving important energy and high adhesion rate

Inactive Publication Date: 2009-12-16
陈红良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials used in domestic production of converter gunning materials are mainly sintered magnesia and fused magnesia. When sintered magnesia is used as the main material, the product has poor corrosion resistance and is not resistant to erosion, and fused magnesia is used as the main material. The erosion performance and erosion resistance are improved, but the material price is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A gunning material formula (percentage by weight) for a converter consists of 60% forsterite with a particle size of 0.1-5mm, 10% dolomite with a particle size of 0.1-3mm, 20% sintered mid-grade magnesia with a particle size of 0.01-0.088mm, and 5% The burning and coagulation accelerator is composed of 5% binder, the burning and coagulation accelerator is slaked lime with a particle size of 0.01-0.088mm, and the binder is sodium hexametaphosphate.

Embodiment 2

[0018] A gunning material formula (percentage by weight) for a converter consists of 50% forsterite with a particle size of 1-5mm, 20% dolomite with a particle size of 0.1-3mm, 20% sintered mid-grade magnesia with a particle size of 0.01-0.088mm, and 5% The sintering accelerator is composed of 5% binder, the sintering accelerator is soft clay with a particle size of 0.01-0.088mm, and the binder is sodium metasilicate.

Embodiment 3

[0020] A gunning material formula (percentage by weight) for a converter consists of 40% forsterite with a particle size of 1-5mm, 30% dolomite with a particle size of 0.1-3mm, 20% sintered mid-grade magnesia with a particle size of 0.01-0.088mm, and 5% Accelerated burning coagulant, composed of 5% binder. The burning and coagulation accelerator is silicon micropowder, and the binding agent is sodium tripolyphosphate.

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PUM

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Abstract

The invention discloses a gunning mix for a converter, which comprises the following components in percentage by weight: 40 to 60 percent of forsterite of which the particle size is between 0.1 and 5 millimeters, 10 to 30 percent of dolomite of which the particle size is between 0.1 and 3 millimeters, 10 to 20 percent of sintered mid-range magnesia of which the particle size is between 0.01 and 0.088 millimeter, 0.5 to 5 percent of burning and coagulation accelerator, and 1 to 5 percent of bonding agent. When applied to the converter, the forsterite gunning mix prepared by adopting the formulation has the advantages of high adhesive rate, good spalling resistance, quick sintering, erosion resistance, scouring resistance and small high temperature expansion, and simultaneously is insusceptible to gun blockage during the construction. Besides, gunning mix has abundant available mineral products with low price so as to play a role of saving important energy resources, has no influence on the quality of molten steel in use, and is free from causing pollution to the environment.

Description

technical field [0001] The invention belongs to the field of refractory materials based on magnesia raw materials, and in particular relates to a formula of gunning material for converters. Background technique [0002] Gunning material is a consumable material for converters in steelmaking plants, and the domestic demand is very large. The raw materials used in domestic production of converter gunning materials are mainly sintered magnesia and fused magnesia. When sintered magnesia is used as the main material, the product has poor corrosion resistance and is not resistant to erosion, and fused magnesia is used as the main material. The erosion performance and erosion resistance are improved, but the material price is relatively high. Contents of the invention [0003] The purpose of the present invention is to provide a formula of gunning material for converter. The forsterite gunning material produced by this formula has high adhesion rate, good peeling resistance, fas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21C5/28
Inventor 陈红良陈雪飞蒋志忠涂妤璐
Owner 陈红良
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