Function of Refining Slag

In order to take with the problem of serious erosion of ladle lining during the desulfrization of LF refining, LF refining slag is adjusted and calcium aluminate system substituted fluorine free refining slag with fluorine. After the adjustment of the slag, the erosion conditions on ladle were improved greatly and refining number, refining ratio and remaining lining thickness after demolishing all increased substantially. The liquidity of new slag system and desulfrization effect could meet the production requirement.

Factors which would effect refractory to dissolve with slag contains as following,?chemical composition and properties of slag; slag refractory component saturation concentration and the actual concentration difference; the reaction product of slag with Refractories; viscosity of slag. For steel mill with refining ladle, especially on Wall slag line, the use of magnesium aluminum carbon brick building, MgO as the main oxides, it is classified as basic refractories. The higher the alkalinity of slag, its ability to dissolve erosion weaker; dissolution erosion rate of slag refractory drank proportional to the difference between the actual concentration of a slag refractory component Cs and the actual concentration Co. Cs-Co larger Refractories in slag dissolution rate will be. The slag viscosity increases, will reduce the rate of dissolution of refractory, refractory damage weakened.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source:Function of refining slag
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Introduction of Calcium Aluminate

The calcium aluminate is also known as pre-melt refining slag or pre-fused alumina slag. The characteristics are as follows:
The chemical composition is uniform, the melting point is low, the melting speed is fast, and the smelting time can be shortened. No fluorine, no erosion furnace lining and ladle;
Free of hydrogen, nitrogen, carbon and other impurities, it is beneficial to improve the quality of steel.
In the case of deoxygenation, it is directly added to the bottom of the bag.The amount of the added weight is determined by the carbon content of the finished steel water, and is generally used for the combination of 4-6kg/1000kg steel.In the first quarter of the steel, the regular added manganese iron, silicon iron, aluminum;After the steel is added to the steel, the steel will be added to manganese and silicon iron, without adding other alloy and aluminum feed line. Using the product to deoxidize, the amount of carbon added (silicon carbide) can be reduced by 30-50%.
In the case of desulphurization, the amount of added in advance use is 1/3, but it must be added to the impact position of bottom steel flow.As the molten steel flows out, the side joins 2/3.Using 6-8kg/1000kg steel, the original sulfur content and the use effect of steel water are determined.
It is mainly used in LF furnace, open hearth furnace, converter ladle refining, remove impurity such as sulfur, oxygen in molten steel, reduce the harmful elements in the steel and the content of impurities, suitable for carbon steel, high carbon steel, high, low alloy steel.
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Article Source: Thermal conductivity of refractory bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/