Slag making material for high manganese steel purification treatment

Abstract

The invention discloses a slag making material for high manganese steel purification treatment. The slag making material for high manganese steel purification treatment is prepared from the followingraw materials in parts by weight: 25 to 53 parts of activated clay powder, 7 to 13 parts of talcum powder, 10 to 16 parts of palygorskite powder, 4 to 6 parts of montmorillonite powder, 32 to 64 partsof quicklime powder, 9 to 15 parts of fluorite powder, 5 to 8 parts of mineral wool, and 1 to 2 parts of binding agent. The slag making material provided by the invention contains the activated claypowder, the talcum powder, the palygorskite powder, the montmorillonite powder, the quicklime powder and the fluorite powder with low melting points and high activity, so that impurities such as hydrogen and oxygen in molten steel are favorably removed, the contents of harmful elements and impurities in steel are reduced, a slag sucking effect is achieved, the quality of the molten steel is greatly improved, the high-purity wear-resistant material is made favorably, meanwhile, the dosage of the slag making material is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of high-performance new materials and metallurgy technology, and in particular relates to a slagging material for purification treatment of high manganese steel. 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...

AI Technical Summary

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

No matter the air blowing is not smooth or the molten steel leaks, it will seriously affect the normal smelting of the steel plant and cause losses to varying degrees. Therefore, it is very necessary to solve problems such as peeling, falling blocks, and fractures of the ventilating bricks.

[0020] (2) At present, the corundum-spinel air permeable bricks commonly used in China are prone to volume expansion in high temperature environments due to the material’s own characteristics. Once the air permeable seam design is unreasonable, air blowing will not be smooth due to expansion. Phenomenon, so that some or all of the ventilation bricks lose the ventilation function

[0021] (3) The medium and low temperature strength of the product is low, and there is a strength inflection point at medium temperature

[0022] (4) The volume of each temperature section of the product is unstable, and cracks are prone to occur during use

[0023] (5) High firing cost

[0024] (6) Long production cycle

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.

Images