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Tengfei Building Materials
Application scope and characteristics of sintered calcium aluminate
Release time:
2021-01-11
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Calcium aluminate 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.
Calcium aluminate produced by Gongyi Zhulin Tengfei Special Building Material Factory has the advantages of uniform chemical composition, low melting point and fast melting speed, which can shorten smelting time. No fluorine, no erosion of furnace lining and ladle; Compact structure, non-absorbent, easy to store storage bin; Because the phase is stable and the slag is formed fast, it can reduce the dust pollution to the steel plant and stabilize the refining process. No hydrogen, nitrogen, carbon and other impurities, to improve the quality of steel.
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 should 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 content of the beginning of the molten steel sulfur and the use of effect to determine.
Characteristics of sintered calcium aluminate:
1, uniform chemical composition, low melting point, fast melting speed, can shorten the refining time;
2, does not contain fluorine, does not corrode furnace lining and ladle;
3. Compact structure, non-absorbent, convenient for storage and transportation bin storage;
4. Due to the stable phase and fast slag formation, it can reduce dust pollution to the steel plant and stabilize the refining process;
5, no hydrogen, nitrogen, carbon and other impurities, is conducive to improve the quality of steel
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