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Separation system and separation method for flotation decarburization of gasified slag

A sorting system and technology of gasification slag, applied in the direction of solid separation, etc., can solve the problems of high chemical consumption and low efficiency of carbon ash separation, and achieve the effects of low cost, strong adaptability and simple process flow

Active Publication Date: 2022-05-27
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004]Based on this, the present invention provides a sorting system and a sorting method for flotation and decarbonization of gasification slag. The organic combination of stage flotation fundamentally solves the technical problems of low carbon ash separation efficiency and high chemical consumption of coal gasification slag

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  • Separation system and separation method for flotation decarburization of gasified slag
  • Separation system and separation method for flotation decarburization of gasified slag

Examples

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Embodiment 1

[0033] like figure 1 As shown, the present invention provides a sorting system for flotation decarbonization of gasification slag, including a main feeding circuit 100, a selection branch 200, a selection return branch 300, a sweeping branch 400 and a sweeping return Bypass 500, where:

[0034] The main feeding path 100 includes a mixing drum A, a feeding pump B, a cyclone classification screen C, a set of pulp conditioner D and a set of flotation columns E, which are sequentially connected along the material transmission direction. The top output end of the flotation column E in the circuit 100 is connected to the input end of the beneficiation branch 200, and the bottom output end of the flotation column E in the main feeding circuit 100 is connected to the sweeping the input end of the branch 400;

[0035]The beneficiation branch 200 includes at least two sets of beneficiation units connected in series in multiple stages, and each set of the beneficiation units includes a...

Embodiment 2

[0041] see figure 1 and figure 2 As shown, the present invention also provides a sorting method for a sorting system using gasification slag flotation and decarbonization, selecting the selection unit in the selection branch 200 and the sweeping unit in the sweeping branch 400. There are two sets, the selection unit and the sweeping unit are defined as the first-level and the second-level according to their serial order. The process flow of the sorting method is as follows:

[0042] 1) The powdered coal gasification slag 1 and water 2 are stirred to obtain the mixture material 3 by the stirring barrel A, and the mixture material 3 is transported to the cyclone classification screen C by the feeding pump B;

[0043] 2) The mixed material 3 is processed by the cyclone classification screen C to obtain the cyclone classification sieve bottom flow 4, the cyclone classification sieve overflow and the undersize 5 of the low ash coarse particle, wherein the cyclone classification s...

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Abstract

The separation method is a separation method combining ore grinding and multi-stage flotation, stage-by-stage enrichment of low-ash carbon particles and high-ash mineral particles is achieved, and the technical problems that in the flotation process of gasification slag, the selectivity is poor, the recovery rate is low, and the coal content of clean coal and tail coal does not reach the standard are solved. By the adoption of the technical scheme, the combined separation process is high in adaptability to the coal gasification slag, the problem that traditional foam flotation is large in traditional Chinese medicine consumption is solved, and great significance is achieved in the fine and deep separation process of the carbon ash in the coal gasification slag; moreover, two products, namely low-ash clean coal and high-ash tailing, are produced under the condition of low chemical consumption level, the low-ash clean coal meets the requirement of fuelization utilization on clean coal calorific value, and the high-ash tailing meets the requirement of gasification slag building material utilization on ignition loss, so that the low-ash clean coal and the high-ash tailing have the advantages of low chemical consumption level and low chemical consumption level. According to the invention, fine and deep separation and quality-divided utilization of the coal gasification slag are realized on the premise of ensuring economic benefits.

Description

technical field [0001] The invention relates to the technical field of fine and deep separation of coal gasification slag, in particular to a sorting system and a sorting method for flotation and decarbonization of gasification slag. Background technique [0002] With the rapid development of modern coal chemical industry, coal gasification is the leader of modern coal chemical technology, and the amount of coal gasification slag produced in the gasification process has increased sharply. Currently limited by technical and cost issues, the main treatment methods of coal gasification slag are landfill and stockpiling, which not only occupy land resources, but also face the risk of harmful heavy metal leachate to water and soil pollution, which seriously affects the regional ecological civilization. Construction and the implementation of the national energy strategy have become prominent bottlenecks restricting the high-quality development of the local modern coal chemical ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/06
CPCB03B9/06
Inventor 张海军李臣威王海楠李鑫李丹龙周若谦梁艳楠赵振洋
Owner CHINA UNIV OF MINING & TECH
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