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Method for recycling sludge in coal washery and online direct recycling process

A technology for coal slime recovery and coal washing plant, applied in dehydration/drying/concentrated sludge treatment, solid waste removal and other directions, can solve the problems of inconvenient storage, loading and unloading, high viscosity and high water content, and achieves the goal of overcoming stickiness and good looseness. Effects of Sex and Mobility

Inactive Publication Date: 2009-10-28
SHANGHAI DATUN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of high moisture, high viscosity, inconvenient warehousing, loading and unloading, and use in the process of coal slime recycling

Method used

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  • Method for recycling sludge in coal washery and online direct recycling process
  • Method for recycling sludge in coal washery and online direct recycling process

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Such as figure 1 As shown, in this online direct recovery process, the coal slime is first dried and then mixed with loose aggregate.

[0015] One is the slime line: the slime water is concentrated by the concentrator, the bottom of the concentrator flows through the filter press for dehydration, and the dehydrated coal slime is dried by a steam dryer, and the moisture is controlled below 15-18%; the second is to wash and mix coal 3. End gangue line: use a crusher to crush the washed mixed coal and the last gangue to make it less than 10mm, and the expected moisture content is less than 6%; Merge in proportion, use the "coal slime recovery continuous crushing mixer" to stir the coal slime, washed coal, and waste gangue to form a coal slime-washed coal mixture, a part of the water in the slime is absorbed by the washed coal, and the overall moisture is controlled at 13 % or less, it can be put into the warehouse directly and transported out by train or car like ordinary...

Embodiment 2

[0018] Such as figure 2 As shown, in this online direct recovery process, the coal slime is first mixed with loose aggregate and then dried.

[0019] One is the slime line: the slime water is concentrated by the concentrator, the bottom of the concentrator flows through the filter press for dehydration, the water content is controlled at 20-23%, and the dehydrated coal slime is waiting to be stirred; Crushing the washed mixed coal and the last gangue to make it less than 10mm, and the expected moisture content is below 6%; the coal slime of the coal slime line and the washed mixed coal and the last gangue of the washed coal line are combined in proportion, and the "coal slime Recycling continuous crushing mixer "stirs coal slime, washed coal, and waste gangue to form a coal slime-washed coal mixture. Part of the water in the slime is absorbed by the washed coal, and then dried by steam or flue gas dryer. The moisture content is controlled below 13%, and the product can be di...

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Abstract

The invention discloses a method for recycling sludge in a coal washery and an online direct recycling process, belonging to the sludge recycling technology. The method comprises the following steps of mixing the materials such as washed coal, gangue, and the like in the sludge to churn up so as to be sufficiently mixed with the sludge, loosening the sludge pie and forming flowable loose blocks; simultaneously using the washed coal to absorb part of sludge water; drying the sludge before mixing or after mixing by stream or smoke so as to reduce the water of the sludge as much as possible. The method and the process have the beneficial effects that the sludge-coal mixed body treated by the process overcomes the difficulty of bonding, plugging, and the like during the warehousing, loading, unloading process of the sludge, can load, unload, store, transport and use the sludge like normal coal, thus leading the waste sludge to change into precious article, reducing the environmental pollution and improving the economic benefits of the coal washery.

Description

technical field [0001] The invention relates to a coal slime recovery method, in particular to a coal slime recovery method in a coal washing plant and an online direct recovery process. Background technique [0002] During the coal preparation process of the coal preparation plant, a large amount of slime water will be produced in the slime line, and a large amount of washed coal and powder will be produced in the mixed coal and waste line. The traditional slime recovery process is: slime water → slime thickener thickener → slime press filter dehydration → slime discharged to the slime site. The water content of the coal slime is about 20-28% depending on the effect of the filter press, and the state of the coal slime is sticky, pasty or gelatinous, which brings great difficulties to the storage, transportation and utilization of the coal slime, and seriously restricts The utilization of coal slime is severely polluted, and the currently widely used methods are roughly: dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C02F11/12
Inventor 丁钟宇王红新于远成王敏李响
Owner SHANGHAI DATUN ENERGY
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