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High-sulfur fertilizer coal modification method and application thereof in coking coal blending

A fat coal, high-sulfur technology, applied in the coking oven, petroleum industry, etc., can solve the problem of reducing the sulfur content of hot melts, and achieve the effect of improving coke quality, expanding coking coal resources, and improving coke quality

Inactive Publication Date: 2013-07-10
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-sulfur fertile coal is modified by thermal solution treatment with an organic solvent to obtain a high-yield hot-melt product, remove almost all ash, inorganic sulfur and part of organic sulfur, thereby reducing the sulfur content in the hot-melt product, and use it for coking Coal blending, improve the bonding performance of blended coal, reduce the sulfur content of blended coal, especially the inorganic sulfur content, and improve the quality of coke. Related research has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the test, the high-sulfur fertile coal with a sulfur content of 2.86% was subjected to hot-melt extraction treatment in a batch reactor at 360°C. The solvent used was 1-methylnaphthalene, and the amount added was 10 times the mass of the coal sample. The particle size of the coal sample is less than 3mm, and it is hot-melted and extracted for 2 hours under the condition of stirring, and hot-state filtration is carried out while it is hot, and the hot-melt product is obtained after the solution is recovered by solvent. Under this condition, the yield of hot-melt material reaches 60%. Compared with the original high-sulfur fat coal, the cohesion index G value of hot-melt material is increased by 40%, the ash content in raw coal is removed by 96%, and the sulfur content of hot-melt material is 1.45%. And all of them are organic sulfur. After carbonization, the sulfur removal rate reaches 60%, and the sulfur content of residual coke is 0.62%. Compared with the coke ob...

Embodiment 2

[0023] In the test, the high-sulfur fertile coal with a sulfur content of 2.86% was subjected to hot-melt extraction treatment in a batch reactor at 260°C. The solvent was 1-methylnaphthalene, and the amount added was 10 times the mass of the coal sample. The particle size of the coal sample is less than 3mm, and it is hot-melted and extracted for 2 hours under the condition of stirring, and hot-state filtration is carried out while it is hot, and the hot-melt product is obtained after the solution is recovered by solvent. Under this condition, the yield of hot-melt matter reaches 56%. Compared with the original high-sulfur fat coal, the cohesion index G value of hot-melt matter is increased by 55%, the ash content in raw coal is removed by 97%, and the sulfur content of hot-melt matter is 1.36%. And all of them are organic sulfur. After carbonization, the sulfur removal rate reaches 62%, and the sulfur content of residual coke is 0.53%. After 5% (mass percentage) of the fat c...

Embodiment 3

[0025] In the experiment, the high-sulfur fat coal with a sulfur content of 2.86% was subjected to hot-melt extraction treatment in a batch reactor at 300°C. The solvent was 1-methylnaphthalene mixed with 20% (mass percentage) ethanol, adding The amount is 10 times the mass of the coal sample, and the particle size of the coal sample is less than 3mm. The hot melt extraction is carried out under the condition of stirring for 2 hours, and the hot state filtration is carried out while the solution is hot. After the solution is recovered by the solvent, the hot melt is obtained. Under this condition, the yield of hot-melt matter reaches 78%. Compared with the original high-sulfur fat coal, the cohesion index G value of hot-melt matter is increased by 32%, the ash content in raw coal is removed by 95%, and the sulfur content of hot-melt matter is 1.53%. And all of them are organic sulfur. After carbonization, the sulfur removal rate reaches 56%, and the sulfur content of residual c...

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Abstract

The invention provides a new technology of thermal solution extraction of high-sulfur fertilizer coal and application thereof in coking coal blending. In the new technology, the high-sulfur fertilizer coal is continuously treated by thermal extraction in a fixed bed reactor or thermal solution extraction in a clearance type reaction still with an organic solvent under proper conditions, after thermal state filtering and separation, a high yield high-sulfur and low-ash thermal solution product is obtained, and the product is used for coking coal blending. By such thermal solution extraction, all the ash component and inorganic sulfur of the thermal solution product are removed, in comparison with the original high-sulfur fertilizer coal, the cohesiveness of the thermal solution product is improved, the sulfur content is reduced obviously, the sulfur is completely the organic sulfur, and the organic sulfur is easy to remove in the subsequent coking process. With the thermal solution product used in the coking coal blending process, the coke quality can be improved obviously, the sulfur content of the coke is lowered, or on the premise of guaranteeing the coke quality, the non-coking coals, such as the subbituminous coal, can be properly added, so that the coal blending coking cost can be lowered, and the coking coal source is stabilized and expanded.

Description

technical field [0001] The invention belongs to the technical field of coal upgrading treatment, and in particular relates to the upgrading treatment of high-sulfur fertile coal and its application in coking coal blending. Background technique [0002] At present, high-sulfur coal (sulfur content greater than 2wt%) is only used for coal gasification and combustion, and coking coal blending directly used for coal has not been reported. Due to the requirements of coke quality, the sulfur content of coking coal blending is required to be less than 1wt%. The technologies related to the present invention are mainly coal direct desulfurization technology and thermal extraction technology, but they are different from the present invention. For example, Zhao Jinglian studied the technology of combining microwave radiation with glacial acetic acid and hydrogen peroxide oxidation to remove organic sulfur from raw coal. With a microwave power of 850W and an irradiation time of 20 minu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/08C10B57/04
Inventor 水恒福周华任世彪张祥宇王知彩雷智平
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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