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Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick

A stainless steel and low carbon aluminum technology, applied in the field of refractory production technology, to achieve the effect of good stainless steel molten steel, strong corrosion resistance, and omitting the firing process

Active Publication Date: 2013-12-25
长兴南冶冶金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as far as the existing technology is concerned, there are still many places to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] Example: Weigh 5-3mm high-bauxite 15-20KG, 3-1mm high-bauxite 20-25KG, ≤1mm high-bauxite 10-15KG, 3-1mm fused magnesia 10-15KG, ≤1mm Fused magnesia 5-10KG, corundum powder 10-15KG, spinel powder 15-20KG, ≤25μm alumina powder 2-5KG, silicon carbide additive 0.1-2KG, wetting agent 0.1-2KG, plus binder phenolic resin 10-25KG spare. Prepare according to the following steps: (1) Pre-mix the powder in the sand mixer. When mixing the materials, first put high-alumina bauxite and fused magnesia of different particle sizes into the sand mixer and mix for 2-3 minutes. Then add silicon carbide additive and phenolic resin binder, and knead for 2-3 minutes; (2) add wetting agent to the kneaded raw materials and knead for 3-5 minutes; (3) add corundum powder, spinel powder, Alumina micro-powder is mixed for 8-10 minutes; (4) the mud material is made and discharged, put into a friction brick press for molding, and made into adobe; the adobe after heat treatment is the finished produc...

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Abstract

The invention discloses a non-phosphorus and low-carbon alumina-magnesia unburned brick for a stainless steel ladle and a manufacturing method of the brick. The non-phosphorus and low-carbon alumina-magnesia unburned brick comprises the following components by mass percentage: 15-20% of 5-3mm bauxite, 20-25% of 3-1mm bauxite, 10-15% of bauxite less than or equal to 1mm in particle size, 10-15% of 3-1mm fused magnesite, 5-10% of fused magnesite less than or equal to 1mm in particle size, 10-15% of emery powder, 15-20% of spinel powder, 2-5% of aluminum oxide micropowder less than or equal to 25 micrometers, 0.1-2% of silicon carbide additive, 0.1-2% of wetting agent and a phenolic resin binding agent. Compared with the prior art, the brick and the method have the prominent advantages that a burning technology in the conventional method is omitted, energy sources are saved, the brick is free from phosphorus; aluminum and magnesium perform spinel reaction at the high temperature; and the brick is subjected to machine molding in the absence of the phosphorus, has higher density, avoids pollution of molten stainless steel, and has a longer service life.

Description

technical field [0001] The invention belongs to the technical field of refractory material production technology, and in particular relates to a technical formula of non-phosphorous low-carbon aluminum-magnesium non-burning bricks for stainless steel ladles and a manufacturing method thereof. Background technique [0002] With the continuous improvement of the market's quality requirements for steel products, the technical level of the modern steel industry must continue to improve. Low-carbon and ultra-low-carbon clean steel has become the focus of development. Among them, the ladle used for secondary refining is an important part of the clean steel smelting process. The equipment adopts vacuum, strong stirring, spraying oxidant and other methods to achieve the purpose of reducing the carbon content in molten steel by improving the kinetic conditions of decarburization in the low carbon area, so that the carbon content can be as low as 60ppm or even 10ppm. Therefore, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 吴国强侯兆田胡竹生杨利强杨宗平
Owner 长兴南冶冶金材料有限公司
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