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Method and device for testing thermal property of semicokes generated by cracking of block coal

A test method and thermal performance technology, applied in the thermal performance test method and test device field of semi-coke generated after lump coal cracking, can solve the problems of unknown reaction process, low strength, inaccurate semi-coke evaluation, etc., and achieve simple structure, Easy to operate, accurate evaluation of the effect

Inactive Publication Date: 2015-06-03
CHONGQING UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for testing the thermal properties of semi-coke generated after lump coal cracking, which can solve the problems of inaccurate evaluation and unknown reaction process when testing the thermal properties of semi-coke with low strength after reaction and wide particle size distribution by traditional methods. Realize the thermal performance evaluation of the gasification reaction of semi-coke produced from non-coking lump coal under reducing atmosphere conditions, and provide a more reasonable and comprehensive theoretical basis for the coal preparation process of non-coking coal

Method used

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  • Method and device for testing thermal property of semicokes generated by cracking of block coal
  • Method and device for testing thermal property of semicokes generated by cracking of block coal
  • Method and device for testing thermal property of semicokes generated by cracking of block coal

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Embodiment

[0036] Example: see Figure 1~3 , a method for testing the thermal properties of semi-coke generated after lump coal cracking. It is tested on 3 kinds of coal samples (1#, 2#, 3#). The 3 kinds of coal are all non-coking lump coal used by COREX.

[0037] The thermal performance test method of generating semi-coke after specific lump coal pyrolysis comprises the following steps:

[0038] Step 1: Screen 2~3kg of 1#, 2#, 3# dry lump coal with a particle size of 25~30mm, package it in a coking tank and quickly (when the coking tank is put into the furnace, the speed should be as fast as possible, put it into the furnace for high-temperature pyrolysis) placed in a coke oven at a temperature of 1000-1100°C for 0.5-2h; the temperature of the coke oven is suitably controlled at 1000°C, and the residence time is 1h. After taking it out, it is cooled to room temperature to obtain the initial semi-coke, which is used as a preferred test of this embodiment. Sample;

[0039] Step 2: Car...

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Abstract

The invention discloses a method for testing thermal property of semicokes generated by cracking of non-coked block coal. The method comprises the steps of: preparing the semicokes from the non-coked block coal; gasifying the semicokes by mixed gas of CO2 and reductive gas, detecting the ingredients of tail gas and drawing a curve chart of reaction time-CO concentration; performing a drum test on the gasified semicokes, and sieving the coke samples after the drum test by sieves with different mesh diameters; drawing a cumulative distribution diagram of the mass percentage of each granularity grade; weighting and summing the mass percentage and the weight of each granularity grade to obtain after-reaction strength. The device for testing the thermal property mainly comprises an electric furnace, a temperature control cabinet, a reaction tank, a flue gas analyzer, a computer, a gas storage tank, and a drying tower and a flow meter which are communicated with the gas storage tank. The problems that the after-reaction strength is low, the evaluation of the thermal property of the semicokes with wide granularity distribution is not correct, the reaction process is not detailed and the like in the traditional method are solved, and the evaluation of the thermal property of the semicockes which are prepared from the non-cake block coal and are gasified under the reductive atmosphere is realized.

Description

technical field [0001] The invention belongs to the field of non-coking coal performance testing, in particular to a thermal performance testing method and a testing device for generating semi-coke after cracking lump coal. Background technique [0002] Non-blast furnace ironmaking processes such as COREX (smelting reduction ironmaking technology that has been industrialized) and FINEX (a new process for directly using powdered ore and non-coking coal to smelt molten iron) can use non-coking lump coal, and the lump coal itself Added at the top of the gasifier, rapid cracking occurs in the high-temperature area above 1000 °C on the vault, and moisture and volatiles are removed. The cracked coal particles are deposited to form a semi-coke bed, and the semi-coke in front of the tuyere produces a large amount of reducing power under pure oxygen injection. The gas is supplied to the shaft furnace for pre-reduction of iron ore. Declining semi-coke and CO 2 The carbon dissolution...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
Inventor 张生富彭海军张溪白晨光温良英邱贵宝吕学伟扈玫珑
Owner CHONGQING UNIV
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