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Fiber deslagging method of coal ash

A fly ash fiber and fiber technology, which is applied in the field of fly ash fiber extraction, can solve the problems of dust, broken fibers flying, environmental pollution, poor slag removal effect, etc., so as to save wood and plant fibers and reduce environmental pollution. , the effect of high fiber purity

Inactive Publication Date: 2008-05-28
南京明鼎燊岩棉设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is less effective in removing slag, and usually only about 80% of slag balls can be removed in the best case
However, some industries have high requirements on the quality of fly ash fibers, such as the paper industry, which requires the fiber fineness to be no more than 5 μm. Obviously, fly ash fibers with a slag content of more than 20% obtained through winnowing cannot meet the production needs.
Therefore, although many production techniques using fly ash fiber to make paper have been published in the newspapers or spread through some media, there is no real large-scale industrial production using fly ash fiber, and thus large-scale production. High-purity fly ash fibers whose fineness does not exceed 5 μm
In addition, when producing fly ash fiber by air separation, there will be a lot of dust, broken fibers flying and endless fan noise, which will pollute the environment

Method used

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  • Fiber deslagging method of coal ash
  • Fiber deslagging method of coal ash
  • Fiber deslagging method of coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The fly ash fiber raw material is continuously put into the multi-tooth rotary machine at a speed of 0.25 tons / hour to make it broken and loose; the above-mentioned preliminarily loosened raw material is sent to the slurry tank through the conveyor belt, and then injected with high-pressure water. Water impacts the above-mentioned raw materials to make them more dispersed and facilitate the separation of slag fibers. According to the weight of raw materials, 5.5m 3 / h speed continuous water injection. Start the water injection pump 6 to stir the water in the slurry tank 1 to disperse the raw materials, and the coal ash fibers are uniformly suspended and distributed in the water to form fiber slurry. Open the gate 2, and the fiber slurry enters the separation tank connected to the slurry tank with a width of 0.15m and a depth of 0.2m, and the measured average flow velocity is 0.05 m / s (the flow velocity is controlled by controlling the size of the gate 2 or the outlet of...

Embodiment 2

[0033] Put the fly ash fiber raw material into the multi-tooth rotary machine continuously at a speed of 5 tons / hour to make it broken and loose; send the above-mentioned preliminary loose raw material into the slurry tank through the conveyor belt, and then inject high-pressure water, use High-pressure water impacts the raw materials to make them more dispersed and facilitate the separation of slag fibers. According to the weight of raw materials, 200m 3 / h speed continuous water injection. Start the water injection pump 6 to stir the water in the slurry tank 1 to disperse the raw materials, and the coal ash fibers are uniformly suspended and distributed in the water to form fiber slurry. Open the gate 2, the fiber slurry enters the separation tank connected to the slurry tank with a width of 0.5m and a depth of 0.2m, and the measured average flow velocity is 0.5 m / s (the flow velocity is controlled by controlling the size of the gate 2 or the outlet of the water injection pu...

Embodiment 3

[0035] Put the fly ash fiber raw material into the multi-tooth rotary machine continuously at a speed of 50 tons / hour to make it broken and loose; send the above-mentioned preliminarily loose raw material into the slurry tank through the conveyor belt, and then inject high-pressure water. High-pressure water impacts the raw materials to make them more dispersed and facilitate the separation of slag fibers. According to the weight of raw materials, 1440m 3 / h speed continuous water injection. Start the water injection pump 6 to stir the water in the slurry tank 1 to disperse the raw materials, and the coal ash fibers are uniformly suspended and distributed in the water to form fiber slurry. Open the gate 2, and the fiber slurry enters the separation tank connected to the slurry tank with a width of 0.8m and a depth of 0.5m, and the measured average flow velocity is 1 m / s (the flow velocity is controlled by controlling the size of the gate 2 or the outlet of the water injection p...

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Abstract

This invention relates to a method to remove residues from fly ash fibers. The technique includes following steps: a) raw materials are crushed; b) fiber paste is prepared; c) the fiber paste flows so that residue balls and fibers can be separated; d) the fibers are collected. It has the characteristics that: a) residue ball content in the fly ash fibers treated with the method in this invention is lower than 0.2% and different thickness-degrade fly ash fibers with a thickness lower than 0.5micron can be separated from such high-purity fibers; b) no pollution will be caused by this invention and water for production can be recycled; c) the fly ash fibers obtained with the method in this invention are substitutive to plant fibers for making paper and fabricating all kinds of composite materials, so that a great amount of timber and plant fibers can be saved and environmental pollution caused by plant fiber production can be avoided or reduced.

Description

technical field [0001] The invention relates to the extraction of fly ash fiber, more specifically, a method for removing slag from fly ash fiber. Background technique [0002] Fly ash fibers are often used as thermal insulation and sound insulation materials, and are made into various insulation boards, pipes, felts and sound-absorbing decorative panels. Fly ash fiber also has fireproof properties, and is increasingly widely used as a building material. In recent years, the FA board developed is a board made of fly ash fiber for construction and home decoration. At present, people are trying to use fly ash fiber to make paper instead of plant fiber, so that on the one hand, it can reduce the consumption of wood and other plant fibers, and on the other hand, it can reduce the pollution to the environment when using plant fiber to make pulp. [0003] The quality of fly ash fibers is largely reflected in the slag content and fiber diameter. Usually, fly ash fibers contain a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/00
Inventor 彭苏宁
Owner 南京明鼎燊岩棉设备制造有限公司