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A method for preventing oxide slag from adhering to crucible during intermediate frequency furnace smelting

A technology for avoiding oxidation and intermediate frequency furnace, applied in the field of metallurgy, can solve the problems such as effective removal or avoidance of intermediate frequency furnace, and achieve the effect of fast slag removal process, protection from damage, and guarantee of product quality

Inactive Publication Date: 2016-01-27
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there is no technical report on the method of effectively removing or avoiding the adhesion of slag on the crucible wall of the intermediate frequency furnace

Method used

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  • A method for preventing oxide slag from adhering to crucible during intermediate frequency furnace smelting
  • A method for preventing oxide slag from adhering to crucible during intermediate frequency furnace smelting
  • A method for preventing oxide slag from adhering to crucible during intermediate frequency furnace smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take the 1.5T intermediate frequency furnace as an example. According to the calculated amount of steel material, 1000kg of material is prepared, of which 200kg of steel material is reserved;

[0037] When using an intermediate frequency furnace for smelting production, first add 800kg of steel material to melt, and when the solid slag layer 3 is formed on the molten steel, sprinkle lime powder 5 on the slag layer 3 along the wall of the crucible 4, so that the lime powder 5 accumulates on the crucible. At the edge of the slag layer 3, the height of lime powder accumulated on the crucible wall is about 1.1 times the height of the solid slag layer and the liquid slag layer; figure 1 shown.

[0038] Then add the reserved 200kg iron and steel material, and the added iron and steel material will make the liquid steel surface push the slag layer to float up, such as figure 2 shown. The lime powder reacts with the oxidized slag at high temperature to produce bubbles, whic...

Embodiment 2

[0041] Take the 1.5T intermediate frequency furnace as an example. According to the calculated steel material weight of 1000kg, prepare materials, of which 300kg of steel material is reserved; when using intermediate frequency furnace for smelting production, first add 700kg of steel material for melting, when the liquid slag layer 2 is formed on the molten steel, the slag along the crucible wall Lime powder is sprinkled into the layer, so that the lime powder 5 is piled up on the edge of the slag layer, and the height of the lime powder 5 piled up on the crucible wall is 1.2 times the height of the liquid slag layer 2; image 3 shown;

[0042] Subsequent operations are the same as in Example 1. The added steel material makes the molten steel surface push the slag layer to float up, such as Figure 4 shown.

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Abstract

The invention relates to a method for preventing an oxidizing slag from being attached to a crucible in an intermediate frequency furnace smelting process. The method comprises the following steps: burdening according to the calculated dosage of the steel material, and reserving 1 / 5 to 2 / 5 of steel material; firstly, adding 3 / 5 to 4 / 5 of steel material to melt down when smelting, scattering lime powder on a slag layer along the circumference of the crucible wall after the slag layer is formed in molten steel, so that the lime powder is stacked between the edge of the slag layer and the crucible wall to form a circle of screen base, and then refilling reserved steel material; moving the liquid level upwards to push the slag layer to float, and forming an isolation zone from the lime powder between the slag layer and the crucible wall, so as to prevent the oxidizing slag from being attached to the crucible wall. By adopting the method disclosed by the invention, the oxidizing slag inside the furnace can be easily removed, the drossing process is time-saving and labor-saving, ramming is avoided, and the crucible of a furnace body is prevented from being damaged.

Description

technical field [0001] The invention relates to a method for preventing oxidation slag from adhering to a crucible during the smelting process of an intermediate frequency furnace, and belongs to the technical field of metallurgy. Background technique [0002] Intermediate frequency furnace is a common heating equipment in the field of metallurgy, also known as intermediate frequency induction furnace, which has the characteristics of short melting period and high production efficiency. The intermediate frequency furnace mainly includes a furnace body and a crucible. The smelting charge is melted in the crucible. The intermediate frequency furnace has the characteristics of cold slag. The contact surface between the surface and the air is solid, and the contact surface with the molten steel is liquid. After the steel material is melted, the oxide slag adheres firmly to the surface of the molten steel. on the crucible wall. During the heating process of molten steel, the fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52F27D25/00
CPCY02P10/20
Inventor 崔建军何孝文赵英杰
Owner LAIWU IRON & STEEL GRP
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