Production technology of molten steel refining furnace slag melting agent

Abstract

The invention discloses a production technology of a molten steel refining furnace slag melting agent. The production technology comprises the following steps that (1) activated clay powder, talcum powder, palygorskite powder, smectite powder, quicklime powder, fluorite powder, mineral wool and a binder are added into a mixer by weight, meanwhile, 22-30 parts of water is added, mixing is performedfor 1-1.5 h under the rotating speed of 300-500 r / min, and uniform slurry is prepared; (2) the uniform slurry is added into a mould and made into particles with the grain size being 0.8-1.2 cm through vacuum suction filter forming; and (3) the particles are fed into a drying oven, drying is performed for 8-10 h under the temperature of 82-93 DEG C, and the slag melting agent is prepared. The slagmelting agent provided by the invention contains the components including the activated clay powder, the talcum powder, the palygorskite powder, the smectite powder, the quicklime powder and the fluorite powder with the low melting points and high activity, impurities including hydrogen, oxygen and the like in molten steel can be removed easily, the contents of the harmful elements such as the hydrogen and the oxygen in the steel are decreased, and accordingly, the mechanical performance of high-purity 18 high manganese steel is improved.

Description

technical field [0001] The invention belongs to the technical field of high-performance new materials and metallurgy, and in particular relates to a production process of molten steel refining furnace slag agent. Background technique [0002] The purity of high manganese molten steel directly affects the quality of castings, and the amount of impurities such as oxides, inclusions, and gas content in high manganese molten steel directly affects the material properties. [0003] Oxygen is one of the elements with the most serious segregation tendency during the solidification process of steel. During the solidification and subsequent cooling process of molten steel, the solubility of oxygen drops sharply, and most of the original dissolved oxygen in steel is oxidized with iron oxide and sulfur These fine inclusions will cause grain boundary embrittlement, which will easily become the starting point of grain boundary cracking during the processing and use of steel, and eventual...

AI Technical Summary

Problems solved by technology

[0011] At present, most of the domestic smelting equipment and processes adopt the non-oxidation smelting process, but the current system for refining high manganese steel has the following disadvantages: First, it cannot detect the washing degree of argon gas to the furnace lining during the purification process of high manganese molten steel. Second, when the molten high manganese steel leaks out of the furnace lining and conducts with the furnace shell, it cannot well avoid the occurrence of furnace accidents; the third is to purify the refined high manganese steel for oxygen and The effect of hydrogen is poor, which affects the quality of the product; Fourth, the quality of the breathable brick used in the refining system of high manganese steel is poor, which affects the effect of blowing argon, thereby affecting the purification effect of oxygen and hydrogen in the refined steel water

However, too much slag removal will cause secondary oxidation on the surface of molten steel, and at the same time, the temperature of molten steel will drop faster, and it will not solve the problems of slag being too sticky and impurities unable to float up and the ladle not sticking to slag. It only reduces the speed of sticking slag on the steel wall.

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