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The method of shortening the smelting cycle of electric furnace

A technology of electric furnace smelting and previous furnace, applied in the direction of electric furnace, furnace, furnace type, etc., can solve the problem of long smelting cycle, shorten the smelting cycle of electric furnace, and facilitate the effect of physical and chemical reactions

Active Publication Date: 2022-03-22
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of long smelting period in the existing electric furnace smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 10t of steel was left in the last smelting furnace, 20kg / t of lime was added to the furnace, and a total of 45t of scrap steel and alloy materials were added to the electric furnace. Ferrosilicon 1.3kg / t steel, slagging agent 3kg / t steel, while blowing oxygen into the furnace, the amount of oxygen blowing is 15m 3 / t steel, the oxygen pressure is 0.9Mpa. At the same time, in the bottom blowing gas mode during the smelting process: the melting period uses N 2 , the flow is controlled at 0.2Nm 3 / t min; the oxidation period uses CO 2 , the flow is controlled at 0.32Nm 3 / t·min; natural gas is used during the reduction period, and the flow rate is controlled at 0.3Nm 3 / t·min. During the reduction period, carbon powder is added to the ladle in an amount of 1.2kg / t steel; then ferrosilicon is added in an amount of 1.8kg / t steel. During the slagging process, the basicity of steel slag is controlled at 2.9. The end point temperature is controlled at 1650°C.

[0034] A...

Embodiment 2

[0036] 10t of steel was left in the last smelting furnace, 22kg / t of lime was added to the furnace, and 45t of scrap steel and alloy materials were added to the electric furnace. Ferrosilicon 1.3kg / t steel, slagging agent 4kg / t steel, while blowing oxygen into the furnace, the amount of oxygen blowing is 16m 3 / t steel, the oxygen pressure is 1.1Mpa. At the same time, in the bottom blowing gas mode during the smelting process: the melting period uses N 2 , the flow is controlled at 0.2Nm 3 / t min; the oxidation period uses CO 2 , the flow is controlled at 0.34Nm 3 / t min; natural gas is used during the reduction period, and the flow rate is controlled at 0.4Nm 3 / t·min. During the reduction period, carbon powder is added to the ladle in an amount of 1.8kg / t steel; then ferrosilicon is added in an amount of 2kg / t steel. During the slagging process, the basicity of steel slag is controlled at 3.0. The end point temperature is controlled at 1670°C.

[0037] After adopting...

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Abstract

The invention belongs to the technical field of electric furnace steelmaking, and specifically discloses a method for shortening the smelting cycle of an electric furnace, comprising the following steps: a. 10 tons of steel is left for smelting in the previous furnace, and lime, scrap steel materials and alloy materials are added into the furnace to make the scrap steel materials Melting, adding carbon powder, ferrosilicon, and slag agent during the melting process, and blowing oxygen into the furnace at the same time; b. Bottom blowing gas during the smelting process: N 2 ; Oxidation phase uses CO 2 ; Use natural gas during the reduction period; c. Add carbon powder 1-2kg / t steel to the ladle during the reduction period; then add ferrosilicon 1.5-2.2kg / t steel; , The temperature at the end of smelting is controlled at 1650-1680°C. In the present invention, by controlling the addition amount and timing of ferrosilicon and slagging agent, combined with the control of bottom blowing, the whole reaction kinetic condition becomes better, which is beneficial to physical and chemical reactions, thereby shortening the electric furnace smelting cycle.

Description

technical field [0001] The invention belongs to the technical field of electric furnace steelmaking, and in particular relates to a method for shortening the electric furnace smelting cycle. Background technique [0002] Time is benefit. The smelting time of the electric furnace is the most critical factor determining the output of the electric furnace. At present, the main index of the electric furnace at home and abroad is the smelting time of the electric furnace. Because time is the main indicator that determines the level of output and the maximization of economic benefits. However, the power conditions of the current electric furnace smelting process are poor, and the lack of heat source leads to a long smelting cycle. Contents of the invention [0003] The purpose of the invention is to solve the problem of long smelting period in the existing electric furnace smelting. [0004] The technical solution of the present invention to solve the above-mentioned technica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/52C21C5/54
CPCC21C5/52C21C5/54Y02P10/20Y02P10/143
Inventor 陈路王建
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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