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

Abstract

The invention discloses a non-phosphorous low-carbon aluminum-magnesium non-fired brick for stainless steel ladles and a manufacturing method thereof, comprising high-bauxite of different particle levels, fused magnesia, corundum powder, spinel powder, alumina micropowder, silicon carbide Additives, wetting agents and phenolic resin binders, the mass percentage of each component is: 5-3mm high-bauxite 15-20%, 3-1mm high-bauxite 20-25%, ≤1mm high-bauxite 10-15%, 3-1mm fused magnesia 10-15%, ≤1mm fused magnesia 5-10%, corundum powder 10-15%, spinel powder 15-20%, ≤25μm alumina powder 2- 5%, silicon carbide additive 0.1-2%, wetting agent 0.1-2%, plus binder phenolic resin. Compared with the prior art, the outstanding advantage of the present invention is that it omits the firing process in the conventional method, saves energy, and does not contain phosphorus. Compression molding makes it have a higher density, avoids pollution to the stainless steel molten steel, and also has a higher 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 ...

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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.