Method for supplying heat in converter by using carbon-based heating agent

A technology for supplementing heat and heating agents, which is applied in the field of iron and steel metallurgy, and can solve the problems of low purity of molten steel, large price differences in stages, and high consumption of power consumption electrodes.

Inactive Publication Date: 2020-03-24
ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the large price difference between scrap steel and molten iron and the change in the material structure of the converter, when the ratio of scrap steel is high, some molten iron has low temperature and low silicon furnace heat is insufficient, and the low temperature at the end will result in low purity of molten steel, high refining and smelting pressure, and high power consumption. , Unstable p

Method used

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  • Method for supplying heat in converter by using carbon-based heating agent
  • Method for supplying heat in converter by using carbon-based heating agent
  • Method for supplying heat in converter by using carbon-based heating agent

Examples

Experimental program
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Embodiment 1

[0011] 1. The carbon-based heating agent used in this example was purchased from Jiangsu Jianai High Temperature Material Co., Ltd., and the product number is 644103.

[0012] Requirements for the manufacture of carbon-based heating agents for manufacturers:

[0013] Physical properties: It is made into briquettes, which can be put into the furnace directly in the high-level silo. It is not suitable for crushing, and there is little pulverization after adding.

[0014] Physical and chemical indicators: carbon content ≥ 75%, sulfur content ≤ 0.2%, moisture ≤ 2%.

[0015] 2. Comparing the use effect of carbon-based heating agent and anthracite, it is finally decided to use carbon-based heating agent.

[0016] (1) Composition comparison

[0017] The composition comparison of bituminous coal and carbon-based heating agent is as follows:

[0018] Material name C / ％ S / ％ N / ％ Volatile matter / % Ash / % bituminous coal 60.65 0.55 - 33.84 5.51 Carbon based ...

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Abstract

The invention discloses a method for supplying heat in a converter by using a carbon-based heating agent. Specifically, the method comprises: after scrap steel is added to the converter, firstly adding the carbon-based heating agent and then adding iron. In this way, the temperature rising rate is increased after the heating agent is added and the heat utilization rate is higher. In the steelmaking process of the converter, if the amount of scrap steel is increased, it is obvious that the heat is insufficient; if a heat source is not added, the converter tapping temperature is inevitably lowered, and then temperature is increased in a finery. The method supplies the heat in the converter by using the heating agent so as to reduce electrodes and power consumption in the finery, and therebyreduce costs relatively.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for supplementing heat in a converter using a carbon-based heating agent. Background technique [0002] Converter steelmaking uses molten iron, scrap steel, and ferroalloy as the main raw materials. The steelmaking process is completed in the converter by the physical heat of the molten iron itself and the heat generated by the chemical reaction between the components of the molten iron without the aid of external energy. The traditional converter steelmaking process is to mix the molten iron from the blast furnace into the converter after being mixed in the iron mixing furnace, and fill it with scrap steel in a certain proportion, and then lower the water-cooled oxygen lance to blow oxygen with a certain oxygen supply, lance position and slagging system. smelting. When the blowing end point is reached, the gun is lifted and the furnace is ...

Claims

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Application Information

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IPC IPC(8): C21C5/28
CPCC21C5/28Y02P10/20
Inventor 缪黄兵金王艳孙惠东王震
Owner ZHANGJIAGANG HONGCHANG STEEL PLATE CO LTD
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