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Slag adhering method for water-cooled wall electric furnace

A water-cooled wall and electric furnace technology, which is applied in the field of high-temperature metallurgy, can solve the problems of short service life of electric furnace and rapid corrosion of furnace lining, and achieve the effect of improving service life and eliminating erosion.

Inactive Publication Date: 2020-11-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for hanging slag in a water-cooled electric furnace, which solves the problems of rapid lining erosion and short electric furnace life in the current high-temperature carbonization process for treating high-titanium slag

Method used

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  • Slag adhering method for water-cooled wall electric furnace
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  • Slag adhering method for water-cooled wall electric furnace

Examples

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Effect test

Embodiment 1

[0035] A company's 25.5MVA circular electric furnace was used to prepare TiC-containing slag, and the raw material used was TiO 2 Titanium-containing blast furnace slag and metallurgical coke with a content of 22-23%. Such as figure 1 As shown, the furnace wall of the electric furnace is the furnace shell, the water wall, the ramming material layer and the refractory brick layer from the outside to the inside. use as Figure 2-3 The water-cooled wall structure of the electric furnace lining is shown, in which the wall body 1 is made of cast iron, the cooling water pipe 2 is made of stainless steel, the distance between the water pipes is D=100mm, the inner diameter is 56mm, and the water flow velocity in the pipe is designed to be 1.2m / s. The ramming material layer is made of graphite, with a thickness of 75mm, and the refractory brick layer is made of magnesia carbon bricks containing 10% carbon, with an initial thickness of 345mm. After smelting to 500 furnaces, a solid s...

Embodiment 2

[0037] A company's 25.5MVA circular electric furnace was used to prepare TiC-containing slag, and the raw material used was TiO 2 Titanium-containing blast furnace slag and metallurgical coke with a content of 22-23%. Such as figure 1 As shown, the furnace wall of the electric furnace is the furnace shell, the water wall, the ramming material layer and the refractory brick layer from the outside to the inside. use as Figure 2-3 The water-cooled wall structure of the electric furnace lining is shown, in which the wall body 1 is made of cast iron, the cooling water pipe 2 is made of stainless steel, the distance between the water pipes is D=100mm, the inner diameter is 56mm, and the water flow velocity in the pipe is designed to be 1.2m / s. The ramming material layer is made of silicon carbide, with a thickness of 40mm, and the refractory brick layer is made of magnesia carbon bricks containing 18% carbon, with an initial thickness of 345mm. After smelting to the 420 furnace,...

Embodiment 3

[0039] A company's 25.5MVA circular electric furnace was used to prepare TiC-containing slag, and the raw material used was TiO 2 Titanium-containing blast furnace slag and metallurgical coke with a content of 22-23%. Such as figure 1 As shown, the furnace wall of the electric furnace is the furnace shell, the water wall, the ramming material layer and the refractory brick layer from the outside to the inside. use as Figure 2-3 The water-cooled wall structure of the electric furnace lining is shown, in which the wall body 1 is made of cast iron, the cooling water pipe 2 is made of stainless steel, the distance between the water pipes is D=100mm, the inner diameter is 56mm, and the water flow velocity in the pipe is designed to be 1.2m / s. The ramming material layer is made of silicon carbide, with a thickness of 20mm, and the refractory brick layer is made of magnesia carbon bricks containing 18% carbon, with an initial thickness of 230mm. After 260 furnaces of smelting, a ...

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Abstract

The invention relates to a slag adhering method for a water-cooled wall electric furnace. The method comprises the following steps: in the electric furnace smelting process, components on the surfacepart of a refractory brick layer of an electric furnace lining react with liquid slag to form a high-melting-point substance, and under the cooling action of a water-cooled wall of the electric furnace lining, the formed high-melting-point substance is condensed on the surface part of the refractory brick layer to form a solid slag adhering layer. By means of the method, the furnace lining and thehigh-temperature slag can be isolated, the solid slag adhering layer is automatically thickened and thinned along with reduction and increase of the temperature of a molten pool in the smelting process, erosion of the slag to the refractory brick layer can be remarkably relieved or even eliminated, and therefore the service life of the furnace lining of the electric furnace is prolonged.

Description

technical field [0001] The invention belongs to the field of high-temperature metallurgy, and more specifically relates to a method for hanging slag in a water-cooled wall electric furnace. Background technique [0002] Panzhihua Iron and Steel blast furnace slag is a unique high-titanium type slag produced by the smelting of vanadium-titanium magnetite, TiO 2 The content is about 20-24%. After years of painstaking research, Panzhihua Iron and Steel has gradually formed a route for the effective utilization of titanium-containing blast furnace slag based on the "high-temperature carbonization-low-temperature chlorination" process. Among them, the high-temperature carbonization process mainly uses an electric furnace to reduce high-titanium slag with a carbonaceous reducing agent at a temperature of 1400°C-1700°C. The main reaction in the smelting process is TiO 2 +3C=TiC+2CO(g), after the smelting is completed, the furnace is opened to discharge the slag. At present, the ...

Claims

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Application Information

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IPC IPC(8): C21C5/54
CPCC21C5/54
Inventor 王东生杨仰军吕学明黄家旭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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