Electric furnace smelting stainless steel slagging method

An electric furnace smelting and stainless steel technology, applied in electric furnaces, furnaces, furnace types, etc., can solve the problems of inability to generate stable foam slag, inability to achieve effective submerged arc, arc energy loss, etc., to shorten the smelting time and reduce smelting electricity. The effect of improving consumption and yield

Inactive Publication Date: 2012-03-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the production of stainless steel in the electric furnace, Cr with a high melting point is formed due to the oxidation of chromium. 2 o 3 The impact on the slag condition can not generate stable and effective foam sl

Method used

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Examples

Experimental program
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Example Embodiment

[0049] Example

[0050] This embodiment is an example of producing 304 stainless steel premelt (to provide stainless steel mother liquid for AOD).

[0051] The capacity of the electric furnace in this embodiment is 160 tons.

[0052] Raw materials: Mainly include stainless steel dust ash sintering pre-reduction pressure ball, stainless steel scrap, high-carbon ferrochrome, steelmaking lime, fluorite block, furnace door oxygen lance, industrial oxygen

[0053] This embodiment is the following sequential steps:

[0054] I electric furnace charging

[0055] A total of 2 baskets, added in 2 times:

[0056] Electric furnace basket (unit ton)

[0057] Material blue 1 Nickel return to scrap 40; nickel-containing pig iron 35; high-carbon ferrochrome 20; slag steel 10;

[0058] Material blue 2 Nickel returns to scrap steel 10; Nickel-containing pig iron 45; High-carbon ferrochrome 15;

[0059] Unscrew the lid of the electric furnace, and load basket 1 first

[0060] II Power Transmission Steel

[0061]...

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PUM

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Abstract

The invention relates to an electric furnace smelting stainless steel slagging method, which comprises the following steps sequentially: I electric furnace charging: materials are added into two material baskets in two times, 40+/-4 of nickel recirculating scrap, 35+/-4 of nickelic pig iron, 20+/-2 of high carbon ferrochrome and 10+/-1 of waste slag are added into the material basket 1, 10+/-1 of nickel recirculating scrap, 45+/-4.5 of nickelic pig iron and 15+/-1.5 of high carbon ferrochrome are added into the material basket 2, and the material basket 1 is firstly charged; II after charging materials in the electrochemical material basket 1 are sent into an electric furnace, a first batch of pressed balls are added, and a second batch of pressed balls and lime are added for second charging; III electric furnace charging; IV electrochemical steel is sent, a third batch of pressed balls and lime are added, a furnace door oxygen lance starts to supply oxygen for fluxing, a fourth batch of pressed balls are added, a fifth batch of pressed balls are added, a sixth batch of pressed balls are added, power is transmitted, and the furnace door oxygen lance stops supplying the oxygen; and VI the power is transmitted to raise the temperature, ferrosilicon is added, and steel is tapped. In the electric furnace smelting stainless steel slagging method disclosed by the invention, stainless steel dedusting pre-reduction pressed balls are utilized to assist producing foamed slag.

Description

technical field [0001] The invention relates to a method for making slag in electric furnace smelting stainless steel. Background technique [0002] The application of foam slag in the production of carbon steel in electric furnace is already a very mature technology, which has a very obvious effect on reducing the power consumption of smelting, shortening the smelting time, and reducing the erosion of electric arc on the furnace wall of electric furnace. However, during the production of stainless steel in the electric furnace, Cr with a high melting point is formed due to the oxidation of chromium. 2 o 3 The impact on the slag condition cannot generate a stable and effective foam slag condition. Because the slag is relatively "dead" and inactive, effective submerged arc cannot be realized, resulting in loss of arc energy, and at the same time, the arc light severely erodes the furnace wall of the electric furnace. Now stainless steel electric furnace foam slag technology...

Claims

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Application Information

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IPC IPC(8): C21C5/54
CPCY02P10/20
Inventor 刘卫东
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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