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Smelting process capable of utilizing converter slag fully

A converter slag and converter smelting technology, applied in the manufacture of converters, etc., can solve the problems of high cost, furnace slag dumping, large pollution, etc., reduce nitrogen absorption, reduce nitrogen absorption and metal splashing, and save time and labor cost effects

Active Publication Date: 2012-09-19
SHOUGANG CORPORATION
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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 provide a smelting process that makes full use of converter slag, which solves the problems of high cost and heavy pollution caused by the slag dumping after the converter smelting is completed in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1.1) The mass fraction of Si in the molten iron entering the furnace in the first furnace is 0.2380%;

[0029] (1.2) When smelting the first furnace slagging, the amount of lime added is 32kg / ton steel, and light burnt dolomite is 10kg / ton steel;

[0030] (1.3) The final slag basicity of the converter is 3.382, and the mass fraction of each component in the slag is: CaO%: 38.366; SiO2%: 11.344; MnO%: 2.852; FeO%: 24.347; MgO%: 10.446; quality of other oxides The score is: 4.308%;

[0031] (1.4) After tapping, keep converter slag;

[0032] (1.5) The mass fraction of Si in the molten iron into the second furnace is 0.2440%;

[0033] (1.6) When the second furnace is slagging, the amount of ash added is 28kg / ton steel, and light burned dolomite is 9.5kg / ton steel;

[0034] (1.7) The final slag basicity of the converter is 3.019, and the mass fraction of each component in the slag is: CaO%: 35.457; SiO2%: 11.743; MnO%: 2.023; FeO%: 14.854; MgO%: 7.959; other oxides The score is: 3.5...

Embodiment 2

[0042] (2.1) The mass fraction of Si in the molten iron entering the furnace is 0.4537%;

[0043] (2.2) When smelting the first furnace slagging, the amount of lime added is 42kg / ton steel, and light burned dolomite is 11kg / ton steel;

[0044] (2.3) The final slag basicity of the converter is 3.221, and the mass fraction of each component in the slag is: CaO%: 44.519; SiO2%: 13.822; MnO%: 1.716; FeO%: 15.879; MgO%: 10.659; other oxides The score is: 3.592%;

[0045] (2.4) After tapping, keep converter slag;

[0046] (2.5) The mass fraction of Si in the molten iron into the second furnace is 0.5183%;

[0047] (2.6) When smelting the second furnace for slagging, the amount of ash added is 31kg / ton steel, and light burnt dolomite is 10.5kg / ton steel;

[0048] (2.7) The basicity of the converter slag at the end point is 2.981, and the mass fraction of each component in the slag is: CaO%: 41.759; SiO2%: 14.008; MnO%: 1.910; FeO%: 18.547; MgO%: 10.836; quality of other oxides The score is: 3...

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PUM

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Abstract

The invention relates to a smelting process capable of utilizing converter slag fully, and belongs to the technical field of converter steelmaking. According to the process, the number of furnaces in which slag is continuously is retained at the end point of a converter is determined to be 2 or 3 according to the mass fraction of a silicon element in molten iron entering the converter, and the reasonable dephosphorizing and decarbonizing conditions are met by controlling the adding amount of lime, slag basicity and the ingredients of final slag of each melt in a cycle; and deslagging is avoided at the blowing end point of the intermediate melt of each cycle. Compared with the conventional process, the smelting process has the advantage that the lime can be saved by 25 to 40 percent.

Description

Technical field [0001] The invention belongs to the technical field of converter steelmaking, and in particular provides a smelting process that fully utilizes converter slag. Background technique [0002] For the traditional converter steelmaking method, all slag is poured out after each furnace is smelted. When the next furnace is smelted, various furnace materials such as lime are added again. This operation mode consumes a lot of lime and has a high cost. Summary of the invention [0003] The purpose of the present invention is to provide a smelting process that makes full use of converter slag, and solves the problems of high cost and high pollution caused by slag dumping after the converter smelting in the prior art. [0004] The technical scheme of the present invention is as follows: a smelting process that makes full use of converter slag. According to the mass fraction of silicon in the molten iron into the converter, a smelting cycle is controlled to include 2 or 3 furna...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C5/36
Inventor 朱国森李海波王新华吕迺冰崔阳刘国梁姜仁波南晓东
Owner SHOUGANG CORPORATION
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