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Efficient steel making process method

A process method and high-efficiency technology, applied in the field of smelting, can solve the problems of strong oxidation of molten steel at the end point, low yield of steel materials and alloys, easy to dry and stick to the gun, etc.

Inactive Publication Date: 2019-11-22
YANCHENG LIANXIN IRON & STEEL CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing high-efficiency steelmaking technology only improves the oxygen supply intensity, reduces auxiliary time, and shortens the smelting cycle from the management point of view to increase production. It generally adopts low-carbon tapping and carbon-increasing smelting. This method has high oxygen supply intensity during the process. , easy to dry back and stick to the gun; the molten steel at the end point is strong in oxidation, has many inclusions, the yield of steel materials and alloys is low, and the process splashes heavily, the middle-term back-drying is serious, and the end point is prone to defects such as high phosphorus

Method used

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Embodiment Construction

[0013] A kind of efficient steelmaking process method, it comprises the steps:

[0014] ——Concentrate material into the furnace, control the composition of molten iron, molten iron silicon 0.3-0.5%, molten iron phosphorus ≦0.12%, S ≦0.045%, control light scrap steel ≦10%, scrap steel baking to 500 ℃; reduce converter dephosphorization, desulfurization and slag burden;

[0015] ——High specific heat of scrap steel is loaded in balance, the C content of the incoming charge is reduced from 4.0% to 3.01%, and the oxygen supply time is shortened by 2 minutes. , Fine-tune the end point temperature in the later stage; reduce the carbon content and oxygen consumption of molten steel, improve the hit rate, avoid blowing and raising the temperature after pulling, and shorten the smelting time.

[0016] ——Oxygen supply technology with variable gun pressure and variable pressure, the flow rate in the early stage and late stage is 25000m3 / h, and the process is 23500m3 / h; the basic gun posi...

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Abstract

The invention relates to the technical field of smelting, and in particular to an efficient steel making process method. The method comprises the following steps of feeding a fine material into a furnace; carrying out high scrap ratio and heat balance loading; carrying out a gun and pressure changing oxygen supplying technology; adopting a bomb dropping temperature measuring and carbon determiningtechnology at an end point; and optimizing the steel tapping process, and changing the converter slag pouring process flow. The process method is high in efficiency, low in cost, free of splashing and drying in the process, and stable in blowing.

Description

technical field [0001] The invention relates to the technical field of smelting, in particular to a high-efficiency steelmaking process. Background technique [0002] The existing high-efficiency steelmaking technology only improves the oxygen supply intensity, reduces auxiliary time, and shortens the smelting cycle from the management point of view to increase production. It generally adopts low-carbon tapping and carbon-increasing smelting. This method has high oxygen supply intensity during the process. , easy to dry back and stick to the gun; the molten steel at the end point is strong in oxidation, has many inclusions, the yield of steel material and alloy is low, and the process splashes heavily, the middle-term back-drying is serious, and the end point is prone to defects such as high phosphorus. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-efficiency steelmaking process with high efficiency, low...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C5/30C21C5/36
CPCC21C5/28C21C5/30C21C5/36C21C2005/366Y02P10/20
Inventor 谢锦官谢吉祥刁承民谢碧风闻树春黄彦飞
Owner YANCHENG LIANXIN IRON & STEEL CO LTD
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