Oxidation of ladle slag line brick

 

The oxidation of ladle slag line brick is mainly carbon oxidation, including gas phase oxidation, liquid phase oxidation, indirect oxidation and the influence of porosity.

Gas phase oxidation refers to the direct oxidation of carbon, which occurs when graphite coexists with air (O2), water vapor (H2O) and carbonic acid at high temperature.

Liquid phase oxidation refers to the oxidation of carbon caused by iron and manganese oxides in the slag. Generally, with the increase of total iron content in the slag, the damage rate of magnesia carbon furnace lining brick will increase. In this process, with the formation of decarburization layer on the surface of carbon containing products, the slag is easy to penetrate and react, resulting in the loose structure of lining brick and accelerating the damage of products.

Indirect oxidation is the reaction between MgO and carbon at high temperature to form decarburized layer, which leads to the deterioration of the structure of MgO-C brick. The most serious damage is the continuous erosion of slag to the decarburized layer, which forms a reaction layer with magnesia to form low melting substance, and finally causes the melting and erosion of ladle MgO-C brick.

How to improve the damage of the slag line?

1. Optimize the refining system and improve the smelting conditions.
2. Use better refractory materials.
3. Change the masonry technology and optimize the brick design.
4. Control the argon blowing and power-on system.
5. Strengthen ladle operation control and red envelope turnover.
6. Add anti-oxidation coating to the inner lining of the ladle.

Article Source：Oxidation of ladle slag line brick

Company name ：Luoyang Wanhao New Material Co., Ltd.

More Refractory Products: http://www.wanhaorefractory.com/en/product.html

Website: http://www.wanhaorefractory.com/

Ladle Magnesia Carbon Brick

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