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Gasification fine slag flotation separation method

A separation method and fine slag technology, applied in flotation, solid separation and other directions, can solve problems such as entrainment into the atmosphere, occupation of land resources, air quality hazards, etc.

Inactive Publication Date: 2021-09-03
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gasification fine slag has a small diameter and is easily carried by the airflow into the atmosphere, causing serious harm to air quality
If it is directly stacked on the spot, it will occupy precious land resources and even seep into the ground like ash, polluting the soil

Method used

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  • Gasification fine slag flotation separation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The gasification fine slag flotation separation method proposed by the present invention has the following steps:

[0029] S1: Add water to the gasification fine slag and mix;

[0030] S2: Add dextrin to the solution mixed in S1, and stir evenly;

[0031] S3: Add water and diesel oil to the solution mixed in S2 and stir evenly;

[0032] S4: Add 2-octanol to the solution mixed in S3, and stir evenly;

[0033] S5: Inflate the solution in S4 and scrape bubbles to obtain a carbon-rich group and an inorganic-rich group.

[0034] The mass ratio of gasification fine slag, inhibitor, collector and foaming agent is 1000:1.5:10:5.

[0035] The slurry concentration of gasified fine slag mixed with water is 50g / L.

[0036] In this example, the ash content is 10.36%, and the yield is 50.81%.

Embodiment 2

[0038] The gasification fine slag flotation separation method proposed by the present invention has the following steps:

[0039] S1: Add water to the gasification fine slag and mix;

[0040] S2: Add dextrin to the solution mixed in S1, and stir evenly;

[0041] S3: Add water and diesel oil to the solution mixed in S2 and stir evenly;

[0042] S4: Add 2-octanol to the solution mixed in S3, and stir evenly;

[0043] S5: Inflate the solution in S4 and scrape bubbles to obtain a carbon-rich group and an inorganic-rich group.

[0044] The mass ratio of gasification fine slag, inhibitor, collector and foaming agent is 1000:1:5:1.

[0045] The slurry concentration after gasification fine slag is mixed with water is 30g / L.

[0046] In this example, the ash content is 11.56%, and the yield is 53.11%.

Embodiment 3

[0048] The gasification fine slag flotation separation method proposed by the present invention has the following steps:

[0049] S1: Add water to the gasification fine slag and mix;

[0050] S2: Add dextrin to the solution mixed in S1, and stir evenly;

[0051] S3: Add water and diesel oil to the solution mixed in S2 and stir evenly;

[0052] S4: Add 2-octanol to the solution mixed in S3, and stir evenly;

[0053] S5: Inflate the solution in S4 and scrape bubbles to obtain a carbon-rich group and an inorganic-rich group.

[0054] The mass ratio of gasification fine slag, inhibitor, collector and foaming agent is 1000:1.2:8:3.

[0055] The slurry concentration of the gasification fine slag mixed with water is 30-50g / L.

[0056] In this example, the ash content is 9.89%, and the yield is 57.19%.

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Abstract

The invention discloses a gasification fine slag flotation separation method. The specific method comprises the steps of S1, adding water into gasification fine slag for mixing; S2, adding an inhibitor into the mixed solution in the step S1, and uniformly stirring; S3, adding water and a collecting agent into the mixed solution in the S2, and uniformly stirring; S4, adding a foaming agent into the mixed solution in S3, and uniformly stirring; and S5, inflating the solution in the step S4, and scraping bubbles to obtain a carbon-rich group and an inorganic-rich group. The method has the advantages of being simple, good in separation effect and the like, and it can be found that the reactivity of the separated carbon-rich group CO2 is good according to thermogravimetric analysis and a carbon conversion rate diagram; the carbon content measured by ignition loss is relatively high and can reach 84.86%; and the ash content of the separated carbon-rich component measured by a scanning electron microscope and XRD analysis is relatively low, and the main constituent elements of the ash component are aluminum and silicon.

Description

technical field [0001] The invention relates to the technical field of gasification fine slag, in particular to a flotation separation method for gasification fine slag. Background technique [0002] The rich carbon content of fine slag makes it impossible to directly landfill or blend for secondary use like coarse slag. The gasification fine slag has a small diameter and is easily carried by the airflow into the atmosphere, causing serious harm to air quality. If it is directly piled up on the spot, it will occupy precious land resources and even seep into the ground, polluting the soil, just like ash. Therefore, how to effectively utilize the gasification fine slag is the technical problem to be solved by the present invention. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a flotation separation method for gasification fine slag, which has the advantages of simple method and good separati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/008B03D1/006B03D101/02B03D101/04B03D101/06
CPCB03D1/008B03D1/006B03D2201/02B03D2201/04B03D2201/06
Inventor 李寒旭李峰崔龙鹏张元春陈文哲刘艳芳张炜杨宏泉宋怡褚永良
Owner ANHUI UNIV OF SCI & TECH
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