Using method of low-melting point and high-activity molten slag

Abstract

The invention discloses a using method of low-melting point and high-activity molten slag. The molten slag is applied to preparing high pure and high manganese steel, in the charging smelting step ofpreparing the high pure and high manganese steel, when furnace charge melts to form molten steel, the surface of the molten steel is covered with the molten slag, until the furnace charge melts down,and after the steps of adjusting mechanical components, cooling in a furnace and temperature control tapping to prepare the high pure and high manganese steel. The molten slag has lower melting pointand high activity, rapidly melts under the condition of intermediate frequency furnace smelting, participates in metallurgical reaction sufficiently, deoxygenation, dehydrogenation, impurity removal and other capacity are high, the quality of the molten steel is greatly improved, and the preparation of the high pure and high manganese steel is facilitated.

Description

technical field [0001] The invention belongs to the field of high-performance new materials and metallurgy technology, and in particular relates to a method for using slag with a low melting point and high activity. Background technique [0002] High manganese steel is a traditional wear-resistant material. After more than one hundred years of development, three series of manganese 13, manganese 18 and manganese 25 have been formed. Among them, manganese 13 has formed international and domestic standards and is relatively mature. Manganese 18 has only international standards, and manganese 25 is more difficult to produce, so there are only internal standards for the company for the time being. Because the microstructure of high manganese steel is single-phase austenite or austenite with a small amount of carbide, it has good toughness and plasticity, and the crack growth rate is very low, so it is safe and reliable to use. Another feature is that under the action of a lar...

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Problems solved by technology

[0016] At present, most of the domestic smelting equipment and processes adopt the non-oxidizing smelting process, but the current system for refining high manganese steel has the following disadvantages: First, it cannot detect the washing degree of the argon gas to the furnace lining during the purification process of high manganese steel liquid, and the choice is better 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 hydrogen effect is poor, which affects the quality of the product; Fourth, the quality of the breathable brick used in the refining high manganese steel system is poor, which affects the effect of argon blowing, thereby affecting the purification effect of oxygen and hydrogen in the refined steel water. Therefore, in view of the above defects, Urgent need to improve the existing medium frequency induction furnace

[0019] (1) During the use of traditional permeable bricks, due to the sharp change of the use temperature, problems such as peeling and falling blocks are prone to occur; some even break during use, resulting in unsmooth blowing of argon, and serious leakage of molten steel

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