LF furnace refining slag used for aluminum-controlled steel

A technology for refining slag and aluminum steel, which is applied in the direction of improving process efficiency, can solve the problems of single formula and cannot meet the production of aluminum-controlled steel, etc., and achieve the effects of improving metallurgical properties, improving refining effect, and improving ladle life.

Inactive Publication Date: 2008-02-13
CHONGQING UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortage that the existing LF furnace refining slag has a single formula and cannot meet the needs of the production of aluminum-controlled steel, the purpose of the present invention is to provide a melting performance, foaming performance, viscosity, alkalinity, reduction performance and surface tension, etc. LF furnace refining slag for aluminum-controlled steel production requirements

Method used

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Embodiment Construction

[0012] According to the design principle of the present invention, the LF furnace refining slag for aluminum-containing steel is prepared from bauxite, lime, dolomite, limestone and wollastonite, and is combined into a plurality of composition formulas (weight % of chemical composition) according to different compositions as shown in the table 1, it is not difficult to calculate the weight of the required raw materials; then the above-mentioned raw materials weighed in proportion are melted evenly in the submerged arc furnace, and cooled naturally after being released from the furnace; crushed, processed and bagged for use.

[0013] Table 1 Formula of LF refining slag for aluminum-controlled steel (%)

[0014] Slag number

[0015] A 4 m 2

[0016] Note: very small amount of P and Fe in slag 2 o 3 、Na 2 O is negligible.

[0017] Among them, the smelting test was carried out according to the formula shown in Table 2, and the test results are shown in T...

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Abstract

The invention discloses a refined slag of LF furnace used in aluminum steel, which is confected by bauxite, lime, dolomite, limestone and wollastonite. The weight percent of the chemical components of the invention is 60.23 to 67.54 CaO, 1.90 to 3.86 SiO2, 10.58 to 17.57 A12O3, 1.84 to 5.57 Mg, 0.09 to 0.23 H2O and 0.036 to 0.042 S and the rest is loss. Through adjusting to the weight of the ingredients of the refined slag, the invention provides the refined slag that can meet requirements of manufacturing aluminum steel in melting performance, foaming performance, viscosity, alkalinity, reduction performance, surface tension and conductivity and can manufacture the refined slag of refined steel liquid with good quality.

Description

technical field [0001] The invention relates to refining slag in an LF furnace for aluminum-controlling steel, in particular to an optimized design of refining slag for an LF furnace, so that its metallurgical performance meets the smelting requirements for aluminum-controlling steel. Background technique [0002] As an important production process in the modern steelmaking process, extra-furnace refining is widely adopted by most steel plants in the world. With the progress of pure steel production technology and the development of continuous casting technology, as well as the requirement of reducing production costs, the extra-furnace refining process and equipment Rapid popularity. In Japan, Europe, the United States and other advanced developed countries, the refining ratio outside the furnace reaches more than 90%, of which the vacuum refining ratio exceeds 50%. As an important part of the short-flow process, refining outside the furnace plays a pivotal role in the who...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 刘清才董凌燕胡兵鹿存房杨剑温良英陈登福
Owner CHONGQING UNIV
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