A method of using biomass extraction products as additives in coal blending and coking

A technology of coal blending coking and biomass, which is applied in coke ovens, petroleum industry and other directions, can solve the problems of high cost and inability to further improve the effect of coal blending and coking, and achieve the effects of improving coke quality, increasing strength, and ensuring optimization effects.

Active Publication Date: 2017-01-11
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the existing coal blending coking technology, the purpose of the present invention is to provide a method of using biomass extraction products as additives in coal blending coking, wherein through the coal blending coking additives, extraction process, coal blending The improvement of the experimental parameters of the coking process can effectively solve the problem that the cost of the existing coal blending coking additives is high and the effect of coal blending coking can not be further improved compared with the existing technology, and the additive amount can be adjusted by combining specific coal blending coking additives. Improvement can achieve the technical effect of optimizing the coking effect of coal blending

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  • A method of using biomass extraction products as additives in coal blending and coking

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Effect test

Embodiment 1

[0026] Taking rice straw as an example, the experiment carried out hot solvent extraction and separation of rice straw in a specially designed reactor at 300°C. The solvent used was 1-methylnaphthalene, and the mass ratio of rice straw to solvent was 1:15. The diameter is 212um ~ 2mm. Raise the temperature to 300°C at a rate of 5°C / min and keep it for 90 minutes, then start in-situ thermal filtration to separate the extract and extraction residue, then filter at room temperature and distill under reduced pressure to obtain solid extracts: high molecular weight extract and low molecular weight extracts. The carbon-based yield (dry ash-free basis) of the low-molecular-weight extract was 23.10%, and the ash content of 0.06% was far lower than 9.98% of the original rice straw. Add 1% (mass percentage) of the low-molecular-weight extract of the extraction product to the Masteel blending coal (Masteel blending coal is a typical steelmaking coal blending, and the proportion of each ...

Embodiment 2

[0029] Taking fir tree sawdust as an example, the experiment carried out hot solvent treatment on fir sawdust in a specially designed reactor at 350°C. The solvent used was 1-methylnaphthalene, and the mass ratio of sawdust to solvent was 1:15. The diameter is 212um ~ 2mm. Raise the temperature to 350°C at a rate of 5°C / min, keep it for 0min, and start in-situ thermal filtration to separate the extract and extraction residue, and then filter at room temperature and distill under reduced pressure to obtain solid extraction products: high molecular weight extract and low molecular weight extracts. The carbon-based yield (dry ash-free basis) of the high molecular weight extract was 39.85% with zero ash content. Add 1% (mass percentage) of the high molecular weight extract of the extraction product to the blended coal of Masteel, and then carry out crucible coking on the blended coal with and without the high molecular weight extract respectively. Compared with the coke made wit...

Embodiment 3

[0031] Taking rice straw as an example, the experiment carried out hot solvent extraction and separation of rice straw in a specially designed reactor at 350°C. The solvent used was 1-methylnaphthalene, and the mass ratio of rice straw to solvent was 1:15. The diameter is 212um ~ 2mm. Raise the temperature to 350°C at a rate of 5°C / min and keep it for 90 minutes, then start in-situ thermal filtration to separate the extract and extraction residue, then filter at room temperature and distill under reduced pressure to obtain solid extracts: high molecular weight extract and low molecular weight extracts. The carbon-based yield (dry ash-free basis) of the low-molecular-weight extract was 33.48%, and the ash content of 0.45% was far lower than 9.98% of the original rice straw. Add 1% (mass percentage) of the low molecular weight extract of the extraction product to the blended coal of Masteel, and then carry out crucible coking on the blended coal with and without the low molecul...

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Abstract

The invention discloses a method for applying a biomass extract product to coal blending for coking as an additive. The method comprises the following steps: (1) extracting biomass with an organic solvent, and obtaining a high molecular weight biomass extract and a low molecular weight biomass extract; and (2) applying the biomass extract to coal blending for coking, namely mixing and coking at least one of the high molecular weight biomass extract and the low molecular weight biomass extract with mixed coal at the mass percent of 0.5%-3%. By mixing and coking at least one of the high molecular weight biomass extract and the low molecular weight biomass extract with the mixed coal, the coke reactivity PRI of coke particles can be lowered on the basis of common mixed coal, and the strength of the prepared coke is greatly improved, so that the use ratio of weakly caking coal or non-caking coal in the mixed coal is increased under the premise of ensuring good strength and low coke reactivity of the prepared coke; and the coking cost is reduced.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of renewable energy (biomass) utilization and coal chemical technology, and more specifically relates to a method for applying biomass extraction products as additives to coal blending and coking. Background technique [0002] Coke is an indispensable charge in blast furnace ironmaking, and its influence rate on the improvement of blast furnace ironmaking technology is more than 30%, occupying an important position in blast furnace ironmaking technology. However, high-quality coking coal resources are scarce and expensive, which puts enormous pressure on iron and steel enterprises adopting blast furnace ironmaking technology. Therefore, developing new coking technology, reducing the proportion of high-quality coking coal in coal blending, expanding coking coal resources, and ensuring the quality and strength of coke are crucial to the development of iron and steel enterprises. However, if ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/06
Inventor 李显张小勇朱贤青李宇航张宗罗光前姚洪吴超
Owner HUAZHONG UNIV OF SCI & TECH
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