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Briquettes, method for producing same, and apparatus for producing same

A technology for preparing a device and briquette, which is applied in the field of its preparation and briquette, and can solve the problems such as the decline of the quality of the briquette and the inability to stably control the quality of the briquette.

Inactive Publication Date: 2016-10-05
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when briquettes are prepared using molasses as a binder, the quality of the briquettes cannot be stably controlled
In particular, if molasses with high moisture content is used, the quality of the coal briquettes deteriorates

Method used

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  • Briquettes, method for producing same, and apparatus for producing same
  • Briquettes, method for producing same, and apparatus for producing same
  • Briquettes, method for producing same, and apparatus for producing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Such as figure 1 Shown, briquette preparation method comprises: the step S10 that provides pulverized coal; The step S20 that provides molasses; The step S30 that provides raw sugar binder; The step S40 that adds curing agent in pulverized coal; A step S50 of forming a mixture of raw sugar binders; and a step S60 of forming the mixture to provide briquettes. In addition, the briquette preparation method may further include other steps.

[0028]First, pulverized coal is provided in step S10. Pulverized coal is used as raw coal. Moisture is mixed in the pulverized coal in advance, and the amount of the mixed water in the pulverized coal is kept to 2wt% to 12wt%. When the amount of water mixed in the pulverized coal is adjusted to the above range, the water can block the pores of the pulverized coal particles. As a result, the curing agent and binder mixed in the subsequent process cannot penetrate into the pulverized coal particles and exist outside the pulverized coa...

experiment example 1

[0085] Coal briquettes were prepared using 2.7 parts by weight of quicklime, 5 parts by weight of molasses (3.25 parts by weight of solid content) and 5 parts by weight of 85% raw sugar solution (4.25 parts by weight of solid content) with respect to 100 parts by weight of pulverized coal. The water content of the pulverized coal was 8.5 parts by weight. The rest of the experimental process is the same as the above experimental example.

experiment example 2

[0087] Coal briquettes were prepared using 2.7 parts by weight of quicklime, 5 parts by weight of molasses (3.25 parts by weight of solid content) and 3 parts by weight of 85% raw sugar solution (0.255 parts by weight of solid content) with respect to 100 parts by weight of pulverized coal. The water content of the pulverized coal was 8.5 parts by weight. The rest of the experimental process is the same as the above experimental example 1.

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PUM

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Abstract

Provided is a method for producing briquettes in which in an apparatus for producing molten iron comprising a melter-gasifier into which reduced iron is fed, and a reducing furnace connected to the melter-gasifier and supplying the reduced iron, the briquettes are fed into the domed part of the melter-gasifier and heated rapidly. The method for producing briquettes comprises the steps of: i) supplying pulverized coal; ii) supplying molasses; iii) supplying raw sugar solution; iv) supplying a mixture by adding molasses and raw sugar solution to the pulverized coal; and v) molding the mixture to supply the briquettes.

Description

technical field [0001] The invention relates to a molded coal, a preparation method and a preparation device thereof. In more detail, it relates to a briquette that can save production costs while improving the cold strength and hot strength of the briquette, its preparation method and its preparation device. Background technique [0002] A reduction furnace for reducing iron ore and a melter-gasifier for melting the reduced iron ore are used in the smelting reduction ironmaking method. When melting iron ore in a melter-gasifier, briquettes are charged into the melter-gasifier as a heat source for melting iron ore. Here, the reduced iron is melted in the melter-gasifier, converted into molten iron and slag, and discharged to the outside. The briquettes charged into the melter-gasifier form a packed bed of coal. After oxygen is blown in through the tuyeres provided on the melter gasifier, the coal packed bed is burned to generate combustion gas. Combustion gas is converte...

Claims

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Application Information

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IPC IPC(8): C10L5/16
CPCC10L5/361C10L5/14C10L2290/04C10L2290/28C10L2290/32
Inventor 金泫贞尹诗景赵敏永李相皓
Owner POHANG IRON & STEEL CO LTD