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Gasifier slag gravity and magnetic joint sorting process

A gasification slag and sorting technology, which is applied in the field of resource utilization of coal gasification ash, can solve problems such as unsatisfactory flotation effect, and achieve the effect of low production cost and high separation efficiency

Active Publication Date: 2020-09-11
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flotation method is a method for high-efficiency separation of fine-grained minerals. Zhao Shiyong (Chinese patent 201620500503.X) grinds the gasified fine slag to a size below 0.5mm as the flotation feedstock, and selects conventional flotation agent diesel oil and 2-octanol. At this time, the loss on ignition of concentrate ore is 50.78%, and the loss on ignition of tailings is 41.92%. The loss on ignition of concentrate and tailings shows a certain difference. , the overall flotation effect is not ideal

Method used

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  • Gasifier slag gravity and magnetic joint sorting process
  • Gasifier slag gravity and magnetic joint sorting process
  • Gasifier slag gravity and magnetic joint sorting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. The gasification slag enters the slurry preparation tank 2 through the belt conveyor 1, and a certain quality of water and coal gasification slag are added to make a slurry with a mass concentration of 70g / L after fully stirring, and the coal gasification slag is fully dispersed in the slurry preparation tank 2 .

[0035] 2. The gasified slag slurry is pumped into the grading screen 3 by the delivery pump P1 to remove particles and impurities larger than 3mm. After dehydration, the particles and impurities on the screen are directly treated as coarse-grained and high-ash products.

[0036] 3. The slurry under the screen passes through the slurry buffer tank T1 and is driven by the delivery pump P2 into the coal slime cyclone gravity separation column 4 with a diameter of 150mm for separation. The feeding pressure is 0.15Mpa. The barrel T2 is pumped into the classifying cyclone 6 with a diameter of 200mm by the delivery pump P3 for classification, the feeding pressure...

Embodiment 2

[0042] 1. The gasification slag enters the slurry preparation tank 2 through the belt conveyor 1, and a certain quality of water and coal gasification slag are added to make a slurry with a mass concentration of 70g / L after fully stirring, and the coal gasification slag is fully dispersed in the slurry preparation tank 2 .

[0043] 2. The gasified slag slurry is pumped into the trommel classifying sieve 3 by the conveying pump P1 to remove particles and impurities above 3 mm, and the particles and impurities on the sieve are dehydrated and directly treated as coarse-grained and high-ash products.

[0044]3. The pulp under the screen passes through the pulp buffer tank T1 and is driven by the delivery pump P2 into the hydrocyclone 4 with a diameter of 150mm and a large cone angle for separation. The cone angle is 90°, the feeding pressure is 0.2Mpa, and the hydrocyclone with a large cone angle The overflow of device 4 passes through the slurry buffer tank T2 and is pumped into ...

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Abstract

The invention discloses a gasifier slag gravity and magnetic joint sorting process. Coarse gasifier slag is sorted by a water-dielectric cyclone to obtain a high-carbon product and a high-ash product;and fine gasifier slag is sorted through high-gradient magnetic separation to obtain a high-ash product and a carbon-rich product. By means of the gasifier slag gravity and magnetic joint sorting process and a device, efficient full-grade-level gasifier slag carbon-ash separation can be realized. The process is high in separation efficiency and low in production cost. The carbon-rich product obtained through separation can serve as a carbon source for activated carbon / coke preparation, etc.; carbon enrichment is further realized through the carbon-rich product obtained through separation dueto ash removal, and the carbon-rich product can be used as a boiler blending raw material or an ecological restoration agent; and the separated high-ash product can be used as a high-quality raw material for building materials.

Description

technical field [0001] The invention belongs to the field of resource utilization of coal gasification ash, and in particular relates to a method for producing high-purity carbon, high-purity ash and carbon-rich products through combined gravity-magnetic separation of gasification slag. Background technique [0002] Coal gasification technology is the leading and core technology of the modern coal chemical industry. During the entrained bed gasification process, two by-products of gasification, coarse slag and fine slag, will be produced. Most of the coarse slag is a solid with the size of glass spherical beans. The porosity of the slag is small, the carbon content is very low, and the water content is also low, while the carbon content of the fine slag is relatively high, generally greater than 20%, or even more than 40%. At present, coal gasification slag is mainly disposed of in landfill, which wastes valuable carbon sources and occupies a large amount of land resources. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 董连平李慧泽樊盼盼王建成鲍卫仁樊民强
Owner TAIYUAN UNIV OF TECH
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