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Compound deoxidizer in calcium series

A composite deoxidizer and calcium-based technology, applied in the field of deoxidizers, can solve the problems of unstable recovery rate of alloying elements, high cost, and large composition fluctuations, improve steel processing and mechanical properties, fast floating speed, and solve nodules. Effect

Inactive Publication Date: 2008-07-02
杨堃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This deoxidation and alloying method is not only costly, but also affected by the end point [C] of molten steel, tapping temperature and the amount of slag, resulting in large fluctuations in the composition of Si and Mn in molten steel, and unstable recovery rates of alloying elements

Method used

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  • Compound deoxidizer in calcium series
  • Compound deoxidizer in calcium series
  • Compound deoxidizer in calcium series

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A calcium-based composite deoxidizer is characterized in that it comprises the following components in proportion by weight:

[0031] Ca: 30% Si: 31.5% C: 18%

[0032] Fe: 10.5% Al: 10%

[0033] The preparation method of calcium composite deoxidizer of the present invention is as follows:

[0034] Weigh calcium carbide, Si-Fe alloy, and aluminum blocks according to the following weight percentages, break them to less than 20mm, and then put them into three double-layer moisture-proof small bags, and then put each small bag into a 10kg double-layer moisture-proof large Product in the bag:

[0035] CaC 2 : 48% Si-Fe: 42% Al: 10%

[0036] The dosage of the calcium-based composite deoxidizer is: 1.0-5.0kg / t·steel.

[0037] The using method of calcium composite deoxidizer of the present invention is:

[0038] After 10-15 seconds of tapping, add the bagged calcium-based composite deoxidizer from the auxiliary chute behind the steelmaking converter, and add all the deoxi...

Embodiment 2

[0040] A calcium-based composite deoxidizer is characterized in that it comprises the following components in proportion by weight:

[0041] Ca: 55% Si: 8% C: 30%

[0042] Al: 5% Ba: 2%

[0043] The preparation method of calcium composite deoxidizer of the present invention is as follows:

[0044] Weigh calcium carbide, Si-Ca-Ba, and aluminum pellets according to the following weight percentages, break them to less than 20mm, and then put them into three double-layer moisture-proof small bags, and then put each small bag into 10kg double-layer moisture-proof Ready-to-Get Product in Bulk Bag:

[0045] CaC 2 : 80% Si-Ca-Ba: 15% Al: 5%

[0046] The dosage of the calcium-based composite deoxidizer is: 1.0-5.0kg / t·steel.

[0047] The using method of calcium composite deoxidizer of the present invention is:

[0048] After 10 to 15 seconds of tapping, the bagged calcium-based composite deoxidizer is manually dropped from the auxiliary chute behind the steelmaking converter, and...

Embodiment 3

[0050] A calcium-based composite deoxidizer is characterized in that it comprises the following components in proportion by weight:

[0051] Ca: 40% Si: 23% C: 33% Al: 4%

[0052] The preparation method of calcium composite deoxidizer of the present invention is as follows:

[0053] Weigh calcium carbide, SiC, and aluminum pellets according to the following weight percentages, crush them to less than 20mm, then pack them into three double-layer moisture-proof small packaging bags, and then put each small packaging bag into a 10kg double-layer moisture-proof large packaging bag. Get products:

[0054] CaC 2 : 65% SiC: 31% Al: 4%

[0055] The dosage of the calcium-based composite deoxidizer is: 1.0-5.0kg / t·steel.

[0056] The using method of calcium composite deoxidizer of the present invention is:

[0057] After 10 to 15 seconds of tapping, the bagged calcium-based composite deoxidizer is manually dropped from the auxiliary chute behind the steelmaking converter, and all t...

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Abstract

This invention discloses a calcium-based composite deoxidant for molten steel deoxygenation and alloying. The calcium-based composite deoxidant comprised: Ca 35-55 wt.%, Si 15-45 wt.%, C 12-25 wt.%, Fe not higher than 12 wt.%, Al 2-5 wt.% and Ba not higher than 2 wt.%. The simultaneous actions of Ca and Al can form 12CaO .7Al2O3 with small specific surface area and low melting point. Besides, its rising speed is high, thus can reduce the quantities of impurities in molten steel and solve the problem of blockage of continuous-casting water gap. The deoxidant has good deoxidization effect, and can effectively increase the recovery rate alloy elements, modify sulfide lards, improve the processability and mechanical properties of steel, and lower the cost of steel.

Description

technical field [0001] The invention relates to a deoxidizer used in the molten steel deoxidation alloying process, in particular to a calcium-based composite deoxidizer with a high recovery rate of alloy elements. Background technique [0002] The deoxidation alloying process of molten steel is an important link related to product quality, and it is also an indispensable process in steelmaking production. At present, in the process of final deoxidation and alloying of molten steel, major domestic steel mills mostly use materials such as aluminum manganese, silicon aluminum barium or silicon aluminum barium calcium for deoxidation. This deoxidation and alloying method is not only costly, but also affected by the end point [C] of molten steel, tapping temperature and the amount of slag, resulting in large fluctuations in the composition of Si and Mn in molten steel, and unstable recovery rates of alloying elements. When the amount of deoxidizer is too large, the acid-soluble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 杨堃
Owner 杨堃