Coal ash resource treating method

Abstract

The invention relates to a processing method of reclamation of ash, comprising a pretreatment procedure, a stirring procedure, a primary selection procedure, an ash purification procedure, an unburnedcarbon purification procedure and a water returning procedure. The procedures of stirring and floatation and the using of the ultrasonic concussion effect can obviously enhance the separation effectof ash and unburned carbon and get purified ash and purified unburned carbon with high purity so as to produce high utilization value and application hierarchy. Furthermore, the water produced in theprocess of dehydration and drying can return and be reused, which greatly reduces the cost of water consumption and ensures that the whole structure can achieve the best reclamation treatment effect.

Description

technical field [0001] The present invention relates to a coal ash resource treatment method, in particular to a coal ash resource treatment method which has good resource recovery and treatment effect and can obtain high-purity coal ash and unburned carbon for reuse. Background technique [0002] In the process of burning coal to generate electricity in thermal power plants, about four-fifths of the by-products of coal ash are lighter fly ash, and one fifth is heavier bottom ash. The main components are roughly similar, mainly silicon, aluminum, iron, etc., and mixed with a lot of unburned carbon. Generally, special treatment (such as removing the unburned carbon contained...) is required before it can be mixed into cement / concrete. Otherwise, it can only be discarded and landfilled or reclamated. Among them, the bottom ash is easy to agglomerate and cause uneven particle size, so it is usually directly disposed of in landfill or landfill. [0003] However, the practice of...

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Problems solved by technology

[0005] However, due to the different sources of coal sources, various coal-processing equipment, and production operations, the quality of the produced coal ash is not stable, and the ratio of incompletely burned unburned carbon may be between 3 and 30%. Between, if it is used to make cement, it will seriously affect the quality of concrete and endanger the structure of the building, so the law stipulates that coal ash that does not meet the legal standards shall not be used to make cement

[0006] This shows that above-mentioned existing coal ash resource processing method and use obviously still have inconvenience and defect, and need to be further improved urgently

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general method has no suitable method to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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