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Method for upgrading and desulfurizing high-sulfur fat coal

A fat coal, high-sulfur technology, applied in the field of coking, can solve the problems affecting the quality of pure iron in blast furnace ironmaking, increase the sulfur content of coke, etc., and achieve the effect of excellent cohesive index and thermal strength increase

Active Publication Date: 2022-05-06
BEIJING RISUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high sulfur content in China's fat coal, excessive dosage will increase the sulfur content in coke, which will affect the quality of pure iron in blast furnace ironmaking

Method used

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  • Method for upgrading and desulfurizing high-sulfur fat coal
  • Method for upgrading and desulfurizing high-sulfur fat coal
  • Method for upgrading and desulfurizing high-sulfur fat coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Take 5kg of Dongpang high-sulfur coal (sulfur content: 3.95%), 0.1kg of titanium dioxide, 0.05kg of nickel fluoroborate and 10L of citric acid aqueous solution (0.2mol / L) to form a slurry, stir and heat to 150°C under nitrogen atmosphere to react 2h; After the material is cooled to room temperature, the solvent is separated, the solid material is washed with deionized water, and then dried in a drying box at 110°C for 8h; 1kg of solid material is coked with 25L to produce rectified and cut washing oil (230-260°C Distillation section) mixed under nitrogen atmosphere, pressurized at 2Mpa, stirred and heated to 350°C for 1 hour; use heat preservation filter to separate liquid material and residue at 150°C; use flash tank to recover solvent and obtain 4.2kg of desulfurized coal.

Embodiment 2

[0061] Take 5kg of high-sulfur coal from Huai Mine (sulfur content: 1.6%), 0.1kg of titanium dioxide, 0.05kg of nickel fluoroborate and 10L of citric acid aqueous solution (0.2mol / L) to form a slurry, stir and heat to 150°C under nitrogen atmosphere to react 2h; After the material is cooled to room temperature, the solvent is separated, the solid material is washed with deionized water, and then dried in a drying box at 110°C for 8h; 1kg of solid material is coked with 25L to produce rectified and cut washing oil (230-260°C Distillation section) mixed under nitrogen atmosphere, pressurized at 2Mpa, stirred and heated to 350°C for 1 hour; use a heat preservation filter to separate the liquid material and residue at 150°C; use a flash tank to recover the solvent and obtain 4.25kg of desulfurized coal.

Embodiment 3

[0063] Take 5kg of Dongpang high-sulfur coal (sulfur content: 2.2%), 0.1kg of titanium dioxide, 0.05kg of nickel fluoroborate and 10L of citric acid aqueous solution (0.2mol / L) to form a slurry, stir and heat to 150°C under nitrogen atmosphere to react 2h; After the material is cooled to room temperature, the solvent is separated, the solid material is washed with deionized water, and then dried in a drying box at 110°C for 8h; 1kg of solid material is coked with 25L to produce rectified and cut washing oil (230-260°C Distillation section) mixed under nitrogen atmosphere, pressurized at 2Mpa, stirred and heated to 350°C for 1h; use a heat preservation filter to separate liquid materials and residues at 150°C; use a flash tank to recover the solvent and obtain 4.1kg of desulfurized coal.

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Abstract

The invention provides a method for upgrading and desulfurizing high-sulfur fat coal, which relates to the technical field of coking and comprises the following steps: (a) mixing high-sulfur fat coal, an organic sulfur removal agent, titanium dioxide and nickel fluoborate to form first slurry; (b) carrying out heating reaction on the first slurry, and separating to obtain a first liquid material and a first solid material; (c) mixing the first solid material and washing oil to form second slurry; (d) carrying out heating and pressurizing reaction on the second slurry, and separating to obtain a second liquid material and a second solid material; (e) carrying out flash evaporation on the second liquid material to obtain an organic solvent and a third solid material; and drying the third solid material to obtain desulfurized coal. According to the method, 50% of organic sulfur and 100% of inorganic sulfur can be removed on the premise that the caking property of the high-sulfur fat coal is not damaged, the utilization rate of precious high-quality coking coal is reduced while the utilization rate of inferior coke is increased, and good economic benefits and environmental benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a method for upgrading and desulfurizing high-sulfur fertile coal. Background technique [0002] Due to the limited production of high-quality coking coal in China, a large amount of fat coal is usually used in China's coal blending structure to increase the caking index of coal blending. However, due to the high sulfur content in China's fat coal, excessive dosage will increase the sulfur content in coke, which will affect the quality of pure iron in blast furnace ironmaking. [0003] Therefore, under the premise of not affecting the main function of fat coal, which is to increase the caking index, effective sulfur removal can greatly improve the utilization rate of inferior fat coal, and then optimize the coal blending system of the coking plant to reduce the coking process cost. [0004] In view of this, the present invention is proposed. Contents of the invention [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02C10L9/08
CPCC10L9/02C10L9/08
Inventor 惠云泽尉乐乐马仁杰庞伟伟刘哲任华伟李浩伟杨磊杨洪庆路利宾
Owner BEIJING RISUN TECH CO LTD
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