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Application of dry quenching coke precipitator dust as heat insulation agent in iron and steel smelting

A technology for iron and steel smelting and coke CDQ, which is applied in the field of CDQ dust removal as an insulating agent in iron and steel smelting, which can solve the problems of high cost, increased cost, fine particle size, etc., and achieves reduced heat preservation cost, excellent heat preservation effect, The effect of lowering the temperature

Inactive Publication Date: 2016-11-09
SHOUGANG SHUICHENG IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It contains rich chemical elements, and its particle size is finer, which has better reuse value; on the contrary, if the CDQ dust removal ash is not reused, or the treatment method is inappropriate, it will cause environmental pollution
In the process of iron and steel smelting, there are relatively few technical studies on the direct use of CDQ dust removal ash for covering and heat preservation treatment, and the cost in the process is relatively high, and a large amount of other raw materials need to be added, resulting in the heat preservation process of steel. The cost increases; at the same time, the amount of CDQ dedusting ash used is unreasonable, making its thermal insulation effect unsatisfactory

Method used

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  • Application of dry quenching coke precipitator dust as heat insulation agent in iron and steel smelting
  • Application of dry quenching coke precipitator dust as heat insulation agent in iron and steel smelting
  • Application of dry quenching coke precipitator dust as heat insulation agent in iron and steel smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of CDQ dedusting ash is used as heat preservation agent in iron and steel smelting. In the iron and steel smelting process, it is covered with CDQ dedusting ash. The covering amount is 52kg per tank. The volume of the tank is 12m3, of which molten iron occupies 11.5m3.

[0042] The CDQ dedusting ash, in terms of mass percentage, has a moisture content of 0.6%, an ash content of 13.5%, a volatile content of 1.26%, a carbon content of 83.99%, a sulfur content of 0.58%, and other unavoidable impurities Accounting for 0.07%. The ash content includes 5.89% silicon dioxide, 4.08% aluminum oxide, 0.6% calcium oxide, 0.15% magnesium oxide, 1.08% ferric oxide, 0.59% potassium oxide, 0.4% sodium oxide. It avoids the process of heat preservation of molten iron or adding other elements to the heat preservation agent, which reduces the preparation cost of the heat preservation agent for iron and steel smelting, and contains enough carbon so that it can effectively spontaneou...

Embodiment 2

[0044] On the basis of Example 1, the others are the same as in Example 1. A CDQ dust removal ash is used as an insulating agent in iron and steel smelting. In the iron and steel smelting process, it is covered with CDQ dust removal ash, and the coverage amount is 60kg per can. , The volume of the tank is 13m3, of which molten iron occupies 11m3.

[0045] The CDQ dedusting ash has a particle size of 20-150 mesh, accounting for 98.85% by mass.

Embodiment 3

[0047] On the basis of Example 1, the others are the same as in Example 1. A CDQ dust removal ash is used as an insulating agent in iron and steel smelting. In the iron and steel smelting process, it is covered with CDQ dust removal ash, and the coverage is 58kg per can. , The volume of the tank is 12.5m3, of which molten iron accounts for 11.3m3.

[0048] The CDQ dedusting ash has a particle size of 20-40 mesh, accounting for 14.64% by mass. The CDQ dedusting ash has a particle size of 40-60 mesh, accounting for 23.41% by mass. The CDQ dedusting ash has a particle size of 60-150 mesh, accounting for 42.3% by mass.

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Abstract

The invention relates to the technical field of heat insulation treatment in iron and steel smelting, in particular to an application of dry quenching coke precipitator dust as a heat insulation agent in iron and steel smelting. The dry quenching coke precipitator dust is used as the heat insulation agent for covering treatment in the iron and steel smelting process, so that the dry quenching coke precipitator dust is reused, the heat insulation cost in the iron and steel smelting process is reduced, the heat insulation effect is better through combination with control on the covering quantity, the temperature reduction is relatively low in the period from heat insulation to pouring of molten iron, and the quantity of the molten iron adhered to an iron can is relatively small.

Description

technical field [0001] The invention relates to the technical field of thermal insulation treatment in iron and steel smelting, in particular to a CDQ dedusting ash used as an insulating agent in iron and steel smelting. Background technique [0002] In the process of iron and steel smelting, it is often necessary to insulate the smelted molten iron to avoid the rapid cooling of the molten iron and cause a large amount of it to be pasted in the smelting tank, resulting in lower output and higher cost in the iron and steel smelting process. However, in the prior art, the heat preservation treatment in the iron and steel smelting process is generally considered from the perspective of the smelting equipment itself, so that the temperature in the smelting equipment is dissipated slowly to achieve the purpose of heat preservation. Treatment includes material selection of equipment, structural adjustment of equipment, and covering with heat insulating agent; and covering with hea...

Claims

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Application Information

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IPC IPC(8): C21C7/00
CPCC21C7/00
Inventor 肖扬武周成林
Owner SHOUGANG SHUICHENG IRON & STEEL GRP
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