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System for preparing high-purity high-manganese steel

A high-manganese steel, pure technology, applied in the field of systems for preparing high-purity high-manganese steel, can solve the problems of molten steel temperature drop, affecting product quality, poor quality of breathable bricks, etc., to simplify the operation process, avoid furnace penetration accidents, and uniform effect of chemical composition

Active Publication Date: 2019-04-05
广西长城机械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • System for preparing high-purity high-manganese steel
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  • System for preparing high-purity high-manganese steel

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preparation example Construction

[0053] The preparation process of the high-purity high-manganese steel includes the design of the system for preparing the high-purity high-manganese steel and the control of process parameters and components.

[0054] (1) Design and prepare high-purity high-manganese steel system

[0055] like figure 1 As shown, it includes: furnace shell 1, furnace lining 2, furnace wall layer (crucible) 3, base 4, gas diffuser 5, ventilation brick 6, air intake pipe 7, live joint 8, furnace body protection contact 9, contact protection device 10, wire 11, furnace cover 12, flow regulator 13, pressure reducing valve 14, argon gas bottle 15, the furnace shell 1 wraps the furnace lining 2, the outer surface of the furnace lining 2 is provided with a furnace wall layer 3, the The bottom of the furnace shell 1 is provided with a base 4, and above the base 4 is provided a gas diffuser 5 and a gas diffuser 6, the gas diffuser 5 is wrapped by the gas diffuser 6, and the gas inlet pipe 7 is connect...

Embodiment 1

[0137] A breathable brick, in parts by weight, comprising the following raw materials: 32 parts of forsterite sand with a particle radius of 1.62-2.31mm, 12 parts of forsterite sand with a particle radius of 1.08-1.62mm, and a particle radius of 0.87- 20 parts of forsterite sand of 1.08mm, 11 parts of fused magnesia with a particle radius of 1.34-1.79mm, 6 parts of fused magnesia with a particle radius of 0.92-1.34mm, and fused magnesia with a particle radius of 0.81-0.92mm 12 parts of magnesia, 12 parts of corundum with particle radius of 1.56-2.08mm, 4 parts of corundum with particle radius of 1.07-1.56mm, 5 parts of magnesium silicate cement, 3 parts of sodium silicate with particle radius of 1.52-2.94nm, 5 parts of sodium permanganate, 0.2 parts of explosion-proof admixture, 0.4 parts of polycarboxylic acid dispersion water reducer, 12 parts of water;

[0138] Forsterite sand MgO of the three different particle radii: ≥43.46%; SiO 2 : 36.92-39.27%;

[0139] The fused mag...

Embodiment 2

[0151] A breathable brick, in parts by weight, comprising the following raw materials: 36 parts of forsterite sand with a particle radius of 1.62-2.06mm, 16 parts of forsterite sand with a particle radius of 1.08-1.62mm, and a particle radius of 0.94- 22 parts of forsterite sand of 1.08mm, 14 parts of fused magnesia with a particle radius of 1.34-1.76mm, 8 parts of fused magnesia with a particle radius of 0.92-1.34mm, and fused magnesia with a particle radius of 0.81-0.92mm 10 parts of magnesia, 15 parts of corundum with particle radius of 1.56-1.96mm, 6 parts of corundum with particle radius of 1.35-1.56mm, 6 parts of magnesium silicate cement, 4 parts of sodium silicate with particle radius of 1.23-3.07nm, 6 parts of sodium permanganate, 0.4 parts of explosion-proof admixture, 0.6 parts of polycarboxylic acid dispersion water reducer, 13 parts of water;

[0152] Forsterite sand MgO of the three different particle radii: ≥46.02%; SiO 2 : 36.92-39.04%;

[0153] The fused mag...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/04F27B14/08F27D7/02F27D1/04C21C7/072B22D41/02C04B35/66
CPCB22D41/02C04B35/66C21C7/072F27B14/04F27B14/08F27B2014/0843F27D1/04F27D7/02F27D2007/023
Inventor 赵四勇廖钊康建田辉周正
Owner 广西长城机械股份有限公司
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