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Element recycling increasing method in molten iron off-line mixing process

A waterline and blending technology, applied in the field of improving element recycling, can solve the problems of complicated process operation and high production cost, and achieve the effect of reducing alloy consumption, reducing energy consumption and improving environmental protection effect

Inactive Publication Date: 2018-05-22
新疆昆玉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional blending process outside the molten iron line, the production cost is high, and the process operation is complicated

Method used

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  • Element recycling increasing method in molten iron off-line mixing process
  • Element recycling increasing method in molten iron off-line mixing process
  • Element recycling increasing method in molten iron off-line mixing process

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Embodiment 1

[0036] Improve element recovery and utilization methods in the mixing process outside the molten iron line. The molten iron is mixed into the ladle before tapping the converter. When tapping, the potential energy of the molten steel is used to stir the molten iron directly into molten steel, reducing the addition of carburizers and alloys.

[0037] Specifically include the following steps:

[0038] (1) Control of the loading amount of the converter: according to the normal loading amount, reduce the control by 1.5~2t; the allowable deviation of the total loading amount is ±1t / furnace;

[0039] (2) End-point tapping control: element mass percentage content P≤0.040%, S≤0.040%, 0.06%≤C≤0.09%; temperature 1630℃~1680℃; according to the tapping hole, ladle, alloy addition, etc. The actual production situation adjusts the tapping temperature;

[0040] (3) Hot metal preparation: the chemical composition C, Si, Mn, P, S of the molten iron in the laboratory, the element mass percentage...

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PUM

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Abstract

The invention discloses an element recycling increasing method in a molten iron off-line mixing process. Before steel tapping of a converter, molten iron is mixed into a steel ladle; and during steeltapping, stirring is performed through the potential energy of liquid steel, then the molten iron is directly changed into the liquid steel, and the adding amount of a carburetant and alloys is reduced. The element recycling increasing method in the molten iron off-line mixing process has the advantages that the carbon, silicon and manganese alloy oxidation of the molten iron through converter converting is reduced, the increased cost is compensated through alloying, and carbon, silicon and manganese alloy elements in the molten iron can replace part of the carburetant and the silicon manganese alloys, and the cost is reduced.

Description

technical field [0001] The invention relates to an off-line mixing process of molten iron, in particular to a method for improving element recovery and utilization in the off-line mixing process of molten iron, and belongs to the field of off-line mixing technology of molten iron. Background technique [0002] In the traditional blending process outside the molten iron line, the production cost is high, and the process operation is complicated. Contents of the invention [0003] In order to reduce the production cost and simplify the process operation, the present invention designs a method for improving the recycling of elements in the mixing process outside the molten iron line, which reduces the oxidation of carbon, silicon, and manganese alloy elements in the molten iron through converter blowing, and compensates for the increase through alloying. The cost of carbon-silicon-manganese alloy in molten iron can replace part of the recarburizer and silicon-manganese alloy ...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/06C21C5/28C22C33/06C22C38/02C22C38/04C22C38/12
CPCC21C5/28C21C7/0006C21C7/06C22C33/06C22C38/02C22C38/04C22C38/12Y02P10/20
Inventor 李长江田国李振王英高磊
Owner 新疆昆玉钢铁有限公司
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