Production technology of molten steel refining furnace slag melting agent

A production process and slag melting agent technology, applied in the field of high-performance new materials and metallurgy, can solve problems such as poor quality of breathable bricks, drop in molten steel temperature, poor oxygen and hydrogen effects, etc., to improve comprehensive mechanical properties, reduce investment, and simplify The effect of the operation

Inactive Publication Date: 2019-04-09
广西长城机械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 a

Method used

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  • Production technology of molten steel refining furnace slag melting agent
  • Production technology of molten steel refining furnace slag melting agent
  • Production technology of molten steel refining furnace slag melting agent

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preparation example Construction

[0045] The preparation process of the high-purity manganese-18 high-manganese steel includes the design of the system for preparing the high-purity manganese-18 high-manganese steel and the control of process parameters and components.

[0046] (1) Design and preparation of high-purity manganese 18 high manganese steel system

[0047] Such as 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 ga...

Embodiment 1

[0129] 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;

[0130] Forsterite sand MgO of the three different particle radii: ≥43.46%; SiO 2 : 36.92-39.27%;

[0131] The fused mag...

Embodiment 2

[0143] 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;

[0144] Forsterite sand MgO of the three different particle radii: ≥46.02%; SiO 2 : 36.92-39.04%;

[0145] The fused mag...

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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...

Claims

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Application Information

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IPC IPC(8): C21B3/02C21C7/076
CPCC21B3/02C21C7/076Y02P10/20
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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