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Exothermic agent for converter molten iron with low heating value

A low calorific value, exothermic agent technology, applied in the manufacture of converters, etc., can solve the problems of unsuitable supplementary heat source, unfavorable converter slag and dephosphorization, high slag alkalinity, etc., achieve good heating effect, increase specific gravity, and cheap price Effect

Inactive Publication Date: 2011-03-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly used in the case of low temperature and normal molten iron [Si], the effect is better, but when the molten iron [Si] into the furnace is low, this heating agent is used, because the heating agent is mainly carbon-containing materials, and the slag alkalinity is too high High, not conducive to converter slagging and dephosphorization, so it is not suitable for low temperature, low silicon hot metal supplementary heat source

Method used

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  • Exothermic agent for converter molten iron with low heating value
  • Exothermic agent for converter molten iron with low heating value
  • Exothermic agent for converter molten iron with low heating value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] After the converter is loaded with steel scrap and molten iron, it is added from the furnace top hopper before ignition and blowing, and the temperature of the molten iron is used to melt the silicon carbon balls as soon as possible.

[0045] Embodiment composition is referring to table 2:

[0046] Table 2

[0047] Example

Silicon material

carbonaceous material

Bauxite

Iron pellets, iron filings

binder

1

47.5

31.3

6.0

7.3

7.9

2

35.0

43.5

10.3

7.2

4.0

3

36.8

32.5

14.0

10.0

6.7

4

43.2

38.3

8.3

4.0

6.2

5

41.5

37.5

10.0

7.0

4.0

6

40.5

41.0

7.5

5.5

5.5

[0048] Implementation result shows (see table 3, table 4), in the molten iron of low calorific value that the Si average value of entering furnace molten iron in converter is 0.179%, temperature...

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Abstract

The invention discloses an exothermic agent for converter molten iron with a low heating value, which comprises the following components in percentage by weight: 31-44 percent of carbonaceous material, 35-48 percent of siliceous material, 6-14 percent of bauxite, 4-10 percent of iron granules or scrap iron and 4-8 percent of binder, and the bulk specific weight of the exothermic agent is 2.2-3.5ton / m<3>. The exothermic agent for the converter molten iron with the low heating value has the characteristic of raising the temperature obviously and promoting slagging for low-silicon and low-temperature molten iron, and can improve the dephosphorizing capability of converter slag.

Description

technical field [0001] The invention relates to an auxiliary material for iron and steel metallurgy, in particular to a heating agent for molten iron with low calorific value in a converter. Background technique [0002] The main raw materials used in converter steelmaking are molten iron and steel scrap, and sometimes some pig iron. The ratio of molten iron and scrap in the converter, that is, the ratio of molten iron or scrap, has a great influence on the operation of the converter. Generally, each manufacturer determines the appropriate ratio of molten iron according to the conditions of molten iron in the factory, the resources of pig iron and scrap steel, and the production requirements. When the molten iron ratio of the converter is determined, when the composition and temperature of the molten iron fluctuate, especially when the molten iron [Si] entering the converter is low and the temperature of the molten iron is low, in order to meet the production capacity demand...

Claims

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Application Information

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IPC IPC(8): C21C5/28
Inventor 徐文杰郑皓宇邵世杰池和冰施允李安东
Owner BAOSHAN IRON & STEEL CO LTD
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