Electric slag liquid pouring method

A casting method and liquid technology, applied in the field of electroslag remelting, can solve the problems of long production cycle, increased production cost, high production cost, etc., and achieve the effects of reducing production cost, improving production efficiency and low production cost

Active Publication Date: 2010-06-23
SHENYANG DONGDA MATERIAL ADVANCED PREPARATION TECH ENG RES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the disadvantages of the traditional electroslag remelting method are: low production efficiency, long production cycle, and high production cost; at the same time, the preparation of metal electrodes not only increases the production cost, but also makes the process complicated and the production cycle long

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Embodiment Construction

[0034] The 30-ton converter in the steelmaking plant is used to provide initial molten steel, which is then refined with 30-ton LF.

[0035] The raw materials for slagging mainly include fluorite, industrial alumina and lime, etc. The specific composition requirements are as follows:

[0036] 1) Fluorite: CaF2≥95.0%, SiO2≤2%, S, P≤0.05%, particle size≤5~10mm;

[0037] 2) Alumina: Al2O3≥97%, particle size≤0.5mm;

[0038] 3) Lime: CaO≥90%, SiO2≤2.5%, S, P≤0.05%, particle size 10~20mm;

[0039] 4) Magnesia: MgO≥95%, SiO2≤2.0%, S, P≤0.01%, particle size≤3~5mm;

[0040] 5) Silica: SiO2≥95%, particle size 1~5mm.

[0041] Slag baking system:

[0042] 1) The baking temperature of fluorite, alumina, magnesia, and silica is ≥800°C, and the holding time is ≥8 hours;

[0043] 2) The lime baking temperature is ≥800°C, the holding time is ≥10 hours, and the temperature is not less than 200°C during use.

[0044] figure 2 11-tundish; 12-crystallizer; 13-liquid slag pool; 14-metal mol...

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Abstract

The invention discloses an electric slag liquid pouring method. The method comprises the following steps: injecting refined molten steel into a tundish, and starting an induction heating power supply of the tundish to heat the molten steel; sealing a dummy ingot device and a crystallizer, then decomposing the liquid furnace slag of predetermined weight in the crystallizer by using a slag decomposing arm, shifting a tundish car to a pouring station, performing centering on a pouring water gap and the crystallizer and pouring the molten steel; when the molten slag liquid level reaches a preset height, beginning stripping, and simultaneously switching on high voltage to make the current pass through the molten slag and place the furnace slag in a high-temperature melting state, wherein the stripping speed is matched with the speed of pouring the liquid molten steel; and opening a secondary cooling device after steel ingots are discharged from the crystallizer so that electric slag liquidpouring is finished. The electric slag liquid pouring method can greatly improve the production efficiency and reduce the production cost.

Description

technical field [0001] The invention relates to an electroslag remelting technology, in particular to an electroslag liquid casting method. Background technique [0002] Electroslag remelting (electroslag remelting) is a melting method that uses the resistance heat generated when the current passes through the slag as a heat source. Its main purpose is to purify metals and obtain steel ingots with uniform and dense clean structure. Steel remelted by electroslag has high purity, low sulfur content, less non-metallic inclusions, smooth surface of steel ingot, clean, uniform and dense, uniform metallographic structure and chemical composition. The as-cast mechanical properties of electroslag steel can reach or exceed the index of forgings of the same steel type. The quality of electroslag ingots depends on the reasonable electroslag remelting process and the equipment conditions to ensure the electroslag process. [0003] There are many types of electroslag remelting product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
CPCY02P10/25
Inventor 姜周华吴小江臧喜民胡道峰沙骏郎秋燕邓鑫戴洪祥单丹阳朱国庆苏龙丹马军
Owner SHENYANG DONGDA MATERIAL ADVANCED PREPARATION TECH ENG RES CENT
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