System for preparing high-purity high-manganese steel

Abstract

The invention discloses a system for preparing high-purity high-manganese steel. The system is characterized by comprising a furnace shell, a furnace lining, a furnace wall layer, a base, a gas diffuser, an air brick, an air inlet pipe, a movable joint, a furnace body protective contact, a contact protector, a wire, a furnace cover, a flow regulator, a pressure reducing valve and an argon bottle.The air brick of the system for preparing the high-purity high-manganese steel can form fine air holes which are uniformly distributed, the air permeability amount is 1.5 times or more of that of a slit type or dispersion type air brick, the argon is diffused into molten steel through the innumerable air holes, the purification rate of the molten steel is obviously improved, and the content of oxygen and hydrogen in the molten steel is reduced; and the problems that a small amount of straight gross holes are formed due to burning of the oxygen during slag iron removal, and the argon quickly runs away from the liquid level after passing through the molten steel in a concentrated mode are solved, and the purification rate of the molten steel is obviously 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 system for preparing high-purity high-manganese steel. 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 eventually lead t...

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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