Sorting and recycling system and process for coal-free gasified fine coal

A recovery system and fine-grained coal technology, applied in the direction of mechanical material recovery, recycling technology, flotation, etc., can solve the problems of high energy consumption and poor separation effect of coal slime, achieve low energy consumption, and improve the economic benefits of the whole plant , The effect of ensuring the quality of clean coal

Active Publication Date: 2022-07-08
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above analysis, the embodiment of the present invention aims to provide a sorting and recovery system and process for fine coal without coal slime, to solve the problem of existing coal The problem of poor mud separation effect and high energy consumption

Method used

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  • Sorting and recycling system and process for coal-free gasified fine coal
  • Sorting and recycling system and process for coal-free gasified fine coal
  • Sorting and recycling system and process for coal-free gasified fine coal

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Embodiment 1

[0041] A specific embodiment of the present invention, such as figure 1As shown in the figure, a separation and recovery system for fine-grained coal without sliming (hereinafter referred to as "separation and recovery system") is disclosed, including a first flotation machine 1, a sedimentation filter centrifuge 2, and a second flotation machine 3 and the first ultra-high pressure filter 4, the first flotation machine 1 is a four-slot flotation machine, and the flotation clean coal in the last two slots of the first flotation machine 1 passes through the sedimentation filter centrifuge 2 for ash reduction and dehydration. The flotation clean coal formed and the flotation clean coal in the last two tanks of the first flotation machine 1 pass through the sedimentation filter centrifuge 2 for ash reduction and dehydration, and the centrifugal liquid formed by the flotation clean coal obtained by the second flotation machine 3 The flotation clean coals in the first two tanks of t...

Embodiment 2

[0086] Another specific embodiment of the present invention, such as image 3 As shown, a sorting and recycling process for non-slimed fine-grained coal is disclosed, using the non-slimed fine-grained coal sorting and recycling system of Example 1, and the steps include:

[0087] The floating coal slurry is fed into the first forced stirring and reformer 7 from the bottom by the sixth material pump 16, and the slurry concentration is set at 500g / L. Add a certain amount (500g / t) of collectors (kerosene, diesel oil, etc.) and a certain amount (200g / t) of foaming agents (sec-octanol, MIBC, etc.) according to the characteristics of the floating slime. The pulp is fully conditioned and modified, overflows from the upper discharge end of the first forced stirring and reformer 7, and enters the first flotation machine 1 continuously, uniformly and stably for sorting.

[0088] After the flotation foam clean coal in the first two tanks of the first flotation machine 1 is defoamed, it ...

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Abstract

The invention relates to a separation and recovery system and process for coal-slime-free fine coal, belongs to the technical field of coal separation and processing, and solves the problems of poor coal slime separation effect and high energy consumption in the prior art. The system comprises a first flotation machine, a sedimentation type filtering centrifugal machine, a second flotation machine and a first ultrahigh pressure filtering machine, the flotation clean coal in the rear two grooves of the first flotation machine is subjected to ash reduction and dehydration through the sedimentation type filtering centrifugal machine to form flotation clean coal; and the flotation clean coal obtained by enabling centrifugate formed after the flotation clean coal in the rear two grooves of the first flotation machine is subjected to ash reduction and dehydration through the sedimentation type filtering centrifugal machine and the flotation clean coal in the front two grooves of the first flotation machine enter the first ultrahigh pressure filter together, wherein the flotation clean coal is obtained by enabling the centrifugate to pass through the second flotation machine and the flotation clean coal obtained by enabling the centrifugate and the flotation clean coal in the first two grooves of the first flotation machine to enter the first ultrahigh pressure filter together. The sorting and recycling system and process are good in sorting effect and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of coal sorting and processing, in particular to a sorting and recycling system and process for fine-grained coal without slime. Background technique [0002] Coal is one of the important industrial raw materials in my country, and it is also an important guarantee for my country's energy security. Although the current coal preparation technology has made great progress, due to the increasingly "lean, fine and miscellaneous" coal mined, more and more fine-grained materials need to be sorted and classified. It is particularly important to realize the green development and clean and efficient utilization of coal, so that the coal preparation plant can achieve the best economic, social and environmental benefits. [0003] Flotation is one of the most economical and effective methods to deal with fine slime, and flotation is a comprehensive process of multiple factors. The main factors affecting the process eff...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03D1/16
CPCB03B9/00B03D1/16Y02W30/52
Inventor 邢耀文刘金成桂夏辉欧战备龙禄才徐梦迪王磊李永改夏阳超曹亦俊
Owner CHINA UNIV OF MINING & TECH
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