All-component comprehensive utilization method of coal gasification fine slag

A coal gasification and full-component technology, which is applied in chemical instruments and methods, solid waste removal, water treatment parameter control, etc., can solve the problems of high treatment cost and cumbersome process, and achieve simple process, reduced consumption, and reduced cost effect

Active Publication Date: 2021-09-03
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Patent CN201710154400.1 discloses a method of using coal gasification fine slag to prepare adsorption material, which uses gravity swirl separation to obtain carbon-rich slurry, and obtains adsorption material through a series of treatments, making full use of the gasification fine slag Carbon components, but the process is cumbersome and the processing cost is high

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  • All-component comprehensive utilization method of coal gasification fine slag

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Embodiment 1

[0028] The coal-to-oil gasification fine slag produced by Ningxia Coal Industry Group Co., Ltd. is used as the raw material for all components in this embodiment 1. The coal gasification fine slag composition is SiO 2 : 53.43%, Al 2 o 3 : 18.72%, Fe 2 o 3 : 10.65%, CaO: 7.97%, MgO: 2.95%, loss on ignition: 21.83%.

[0029] Proceed as follows:

[0030] S1. After the above samples are ground to a particle size of less than 74 μm by a ball mill, flotation is carried out using a hydrocarbon compound agent as a collector and 2-octanol as a foaming agent. Collect the flotation concentrate, i.e. gasification residual carbon, and collect the flotation tailings, i.e. decarbonization tail ash for later use. Among them, the flotation yield is 42.98%, the loss on ignition is 46.28%, and the flotation tailings yield is 57.02%. The loss on ignition was 3.4%.

[0031] S2. The collected gasification residual carbon is used as an adsorbent, put into the coal gasification wastewater and f...

Embodiment 2

[0037] The gasification fine slag produced by the coal gasification of Yankuang and Lunan is the raw material used in the whole component in this embodiment 2, and the composition of the coal gasification fine slag is SiO 2 : 51.04%, Al 2 o 3 : 11.83%, Fe 2 o 3 : 13.49%, CaO: 12.54%, MgO: 1.28%, loss on ignition: 22.93%.

[0038] Proceed as follows:

[0039] S1. After the above samples are ground to a particle size of less than 74 μm by a ball mill, flotation is carried out using a hydrocarbon compound agent as a collector and 2-octanol as a foaming agent. Collect the flotation concentrate, i.e. gasification residual carbon, and collect the flotation tailings, i.e. decarbonization tail ash for later use, among which the flotation yield is 38.91%, the loss on ignition is 46.10%, the flotation tailings yield is 61.09%, and the incineration The loss is 3.2%.

[0040] S2. The collected gasification residual carbon is used as an adsorbent, put into the coal gasification wastewa...

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Abstract

The invention relates to the technical field of solid waste comprehensive utilization, in particular to an all-component comprehensive utilization method of coal gasification fine slag. The method is used for preparing geopolymer dry powder from coal gasification fine slag, and comprises the following steps: carrying out charcoal-ash separation on the coal gasification fine slag by utilizing ore grinding and flotation, respectively carrying out wastewater adsorption utilization and alkali fusion treatment on charcoal ash, and mixing the treated charcoal ash with ore grinding to prepare the geopolymer dry powder. Water can be directly added in the geopolymer dry powder obtained by the all-component comprehensive utilization method for use, the geopolymer dry powder can be quickly solidified at normal temperature, is high in tensile strength, and obviously improves the feasibility of the coal gasification fine slag in the field of geopolymer utilization.

Description

technical field [0001] The invention relates to the technical field of solid waste comprehensive utilization, in particular to a method for comprehensive utilization of all components of coal gasification fine slag. Background technique [0002] Coal has an important strategic position in my country's national economic and social development. Modern coal chemical industry is an important way for clean and efficient utilization of coal, and coal gasification is the leading technology of modern coal chemical industry. At present, a large amount of gasification slag produced in the process of coal gasification, especially gasification fine slag, is facing many difficulties in resource utilization, which has seriously affected the ecological environment and is becoming a prominent bottleneck restricting the high-quality development of the modern coal chemical industry. [0003] Based on its special gasification process, coal gasification fine slag has the characteristics of fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C02F1/28
CPCB09B3/00B09B5/00C02F1/283C02F2209/08
Inventor 田全志张海军姚蒴陈长帅潘海银
Owner CHINA UNIV OF MINING & TECH
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