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Method for manufacturing partially carbonized coal briquettes, apparatus for manufacturing partially carbonized coal briquettes, and apparatus for manufacturing molten iron

A preparation device, coal briquetting technology, applied in fluidized bed furnaces, sustainable manufacturing/processing, special forms of dry distillation, etc.

Inactive Publication Date: 2013-10-23
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effective handling of the large volumes of iron ore fines and fine coal generated after the screening of lump ore and lump coal for use in the Kerex process remains to be solved

Method used

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  • Method for manufacturing partially carbonized coal briquettes, apparatus for manufacturing partially carbonized coal briquettes, and apparatus for manufacturing molten iron
  • Method for manufacturing partially carbonized coal briquettes, apparatus for manufacturing partially carbonized coal briquettes, and apparatus for manufacturing molten iron
  • Method for manufacturing partially carbonized coal briquettes, apparatus for manufacturing partially carbonized coal briquettes, and apparatus for manufacturing molten iron

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0067] Partially carbonized coal briquette preparation device 540 is a device for partially carbonized coal briquette. The description about the preparation device 540 of partially carbonized coal briquettes is repeated with the foregoing content, so it is omitted.

[0068] The melter-gasifier 540 receives compressed iron from the compressed iron preparation device 520 and receives partially carbonized coal briquettes from the partially carbonized furnace coal briquette preparation device 530 to prepare molten iron.

experiment example 1

[0070] A 1% viscosity modifier was added to the coal to adjust the fluidity of the coal to 1.2 log ddpm and the total expansion to 35%, and coal briquettes were prepared from the blended coal.

[0071] The coal briquettes produced as above were partially carbonized in a carbonization furnace. The hot strength of partially carbonized coal briquettes was shown to be above 90%. The thermal strength represents the weight ratio of the particle size of 16 mm or more after rapidly heating 500 g of the sample coal briquette at 950° C. and rotating it for 30 minutes.

[0072] Moreover, even if there is contact between the coal briquettes in the carbonization furnace, there is no phenomenon of mutual bonding or adhesion. That is, the coal briquettes loaded from the upper part are smoothly lowered to the lower part and discharged.

experiment example 2

[0074] The test was performed in the same manner as in Experimental Example 1 except that the fluidity of the coal was adjusted to 1.90 log ddpm and the total expansion to 60% by using a viscosity modifier of 0.5%.

[0075] The test results show that the thermal strength of the coal briquettes is above 90%, and there is no bonding or adhesion between the coal briquettes.

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Abstract

Disclosed are an apparatus and a method for manufacturing molten iron. The apparatus for manufacturing molten iron according to the present invention includes: a multi-stage fluidization furnace for converting a fine iron ore into a fine direct reduced iron by reduction; at least one high temperature agglomerating apparatus for pressing the fine direct reduced iron to manufacture a high temperature agglomerate; at least one pulverizing apparatus for pulverizing the high temperature agglomerate to a predetermined particle size; a first transporting apparatus for transporting the pulverized high temperature agglomerate; and a melting furnace for melting the transported high temperature agglomerate by combusting a powder-type or agglomerate-type steam coal and supplying a reduced gas generated in the furnace to a fluidization reduction furnace. Further, at least one agglomerate storing bath for storing a portion of the pulverized high temperature agglomerate is further included. The molten iron can be stably and efficiently manufactured by applying the present invention.

Description

technical field [0001] The invention relates to a method for preparing a partially carbonized coal briquette with excellent thermal strength, a preparation device for a partially carbonized coal briquette, and a molten iron preparation device. Background technique [0002] The blast furnace process for producing molten iron continues to develop as the most competitive ironmaking process in terms of productivity and energy efficiency. However, for blast furnace operation, sinter or pellets or coke that has been pre-compressed fine ore and pulverized coal processes are required. At this time, in order to satisfy the quality required in the blast furnace process, there is a restriction that iron ore and coal raw materials having a certain grade or higher must be used. [0003] The development of technology and the improvement of related devices to overcome this limitation have been actively carried out, but there are still constraints to some extent. That is, high-grade iron ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/04
CPCC21B13/002C10B53/08C10L5/361C10B49/06C21B13/0066C10L5/447Y02E50/30C21B13/0086C21B13/0033C10L9/08Y02E50/10C21B13/14C21B2100/60C21B2100/66
Inventor 李成洙许南焕李后根
Owner POHANG IRON & STEEL CO LTD
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