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Craftsmanship
Tengfei Building Materials
Application of sintered refining slag
Release time:
2021-01-20
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Sintered calcium aluminate (sintered calcium aluminate slag) is mainly used for refining ladle of LF furnace, open hearth furnace and converter to remove impurity such as sulfur and oxygen in molten steel and reduce the content of harmful elements and impurities in steel. It is suitable for ordinary carbon steel, high carbon steel, high and low alloy steel. It has already been mature in foreign countries, such as South Korea, Japan, Europe and the United States and other developed countries.
The calcium aluminate produced by Gongyi Pengda Refractory Co., Ltd. has uniform chemical composition, low melting point and fast melting speed, which can shorten the smelting time. No fluorine, no erosion of furnace lining and ladle; Compact structure, easy to store storage warehouse; Because the phase is stable and the slag is formed fast, it can reduce the dust pollution to the steel plant and comprehensively stabilize the refining process. No hydrogen, nitrogen, carbon and other impurities, to improve the quality of steel. It has been proved by users that the curve function of the stability of calcium aluminate products with time is almost a straight line. To avoid the middle and low grade products (sintering products, cupola products) wavy, sawtooth curve function to the metallurgical production brought about a lot of inappropriate phenomenon.
In addition, we can also organize mass production according to the chemical composition required by users, and keep the secret for users.
[Usage]
When it is mainly deoxidized, it is directly added to the bottom of the package before taking out the steel. The amount of adding is determined by the carbon content of the end molten steel, and is usually added by 4-6kg/1000kg steel; 1/4 of the steel before joining the conventional ferromanganese, ferrosilicon, aluminum; After the steel is taken out, the carbon structure steel is connected with conventional manganese and ferrosilicate, and no other alloy or aluminum feeding wire is needed. The molten steel in the package only needs to be refined by blowing argon. Using this product to deoxidize, carbonizing agent (silicon carbide) dosage can be reduced by 30-50%
When desulfurization is the main method, 1/3 of Dacron is added in advance at the bottom of the package, but it must be added at the impact position of the steel flow at the bottom of the package. With the flow of molten steel, the side adds 2/3 amount; The usage of 6-8kg/1000kg steel, depending on the original sulfur content of molten steel and use effect to determine.
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