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Molded coal and manufacturing method therefor

A technology of briquette and preparation equipment, which is applied in the field of briquette and its preparation, can solve the problems such as the inability to control the quality of briquette and the decline of briquette quality, and achieve the effects of improving fuel efficiency, reducing reactivity, and improving economy

Inactive Publication Date: 2018-05-11
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when molasses is used as a binder to prepare briquettes, the quality of briquettes cannot be stably controlled
In particular, if high-moisture molasses is used, the quality of briquettes will deteriorate

Method used

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  • Molded coal and manufacturing method therefor
  • Molded coal and manufacturing method therefor
  • Molded coal and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] Such as figure 1 As shown, the briquette preparation method includes: step S10 of providing pulverized coal; step S20 of mixing starch, acid aqueous solution and water to prepare a binder mixture; mixing pulverized coal and binder mixture to prepare a mixed coal Step S30; and the step S40 of molding the mixed coal to prepare coal briquettes. In addition, the briquette preparation method may also include other steps as required.

[0037] First, pulverized coal is provided in step S10. Pulverized coal is pulverized coal. Generally, coal is divided into peat with a carbon content of about 60%, wood coal and lignite with a carbon content of about 70%, sub-bituminous coal with a carbon content of about 70% to 80%, and subbituminous coal with a carbon content of about 80% to 80%. 90% bituminous coal, more than 90% anthracite. The type of coal used is not particularly limited, and a single type of coal or various types of coal may be used in combination. In order to reduce...

Embodiment 1

[0079] Example 1: Viscoelastic testing of pH-based bioplastics

[0080] 704 g of starch, 793 g of water, and 70.4 g of an aqueous solution of 5 wt % acid (acetic acid) were mixed to prepare binder mixtures with pHs of 3.0, 4.0, 5.0, and 6.0. For comparison, an adhesive mixture with a pH of 7.0 in aqueous solution without mixing acid was also prepared. Then, the binder mixture was heated to 70°C to prepare the bioplastic.

[0081] The storage modulus G' (storage modulus) and loss modulus G" (loss modulus) of each bioplastic were measured according to the pH of the binder mixture and are shown in Image 6 middle.

Embodiment 2

[0082] Example 2: Viscoelasticity Tests of Bioplastics Based on Acid Species

[0083] The same test as in Example 1 was carried out by substituting the kind of acid for citric acid, lactic acid, malic acid, tartaric acid, and ascorbic acid.

[0084] Calculate the complex viscosity (|η*| 10 ) and shown in Figure 7 middle.

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Abstract

Provided are: molded coal to be rapidly heated by being charged in a dome part of a melting gasification furnace in an apparatus for manufacturing molten iron, the apparatus comprising the melting gasification furnace in which reduced iron is to be charged, and a reduction furnace connected to the melting gasification furnace and providing reduced iron; and a manufacturing method therefor. The method for manufacturing molded coal comprises the steps of: providing fine coal; preparing a binder mixture by mixing starch, an acid aqueous solution and water; preparing a coal blend by mixing the fine powder and the binder mixture; and manufacturing molded coal by molding the coal blend.

Description

technical field [0001] The invention relates to a molded coal and a preparation method thereof. More specifically, the present invention relates to a briquette using bioplastics and a preparation method thereof. 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. After the reduced iron is melted in the melter-gasifier and converted into molten iron and slag, it is 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. The combustion gas is converted into a high-temperature reducing gas while rising through the coal-packed bed. The high...

Claims

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Application Information

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IPC IPC(8): C10L5/44C10L5/40
CPCC10L5/14C10L5/361C10L2290/24C10L2290/30Y02E50/10Y02E50/30
Inventor 金泫贞金洪山李相皓朴硕仁崔茂业朴宇逸赵敏永
Owner POHANG IRON & STEEL CO LTD
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