Method for preparing sludge ceramsite by regenerating pottery sand and flue dust

A technology of sludge ceramsite and flue ash, which is applied to ceramic products, applications, household appliances, etc., can solve the problems of difficult sludge recycling, difficult solid-liquid separation, and increased energy consumption, achieving short preparation time, Small secondary pollution and high utilization rate of sludge

Active Publication Date: 2015-12-23
宜昌朗天新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a thick substance between liquid and solid, which can be transported by pump, but it is difficult to separate solid and liquid by settling
Although there have been a large number of reports on the use of sludge in the preparation of ceramsite, the problems of increased energy consumption and complex processes caused by sludge dehydration are still difficulties and technical bottlenecks in sludge recycling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A method for preparing sludge ceramsite by regenerating ceramsite and flue ash, the raw material used and its mass percentage are 40% (moisture content 60%) of water plant wet sludge and shale with a particle size of less than 5mm Ceramic sand 20%, ceramsite calcined fly ash 35% (the flue fly ash captured by the dust collector due to the burning of rice husk agricultural waste during the preparation of ceramsite), the purity is more than 80%, and the fineness is less than 0.01mm 2% of ferrous polysilicate powder, 2.5% of high alumina cement, and 0.5% of polycarboxylate superplasticizer with a concentration greater than 40wt.%. After 80°C, add wet sludge, ceramsite calcined fly ash, polysilicate ferrous silicate, high alumina cement and polycarboxylate superplasticizer, etc., which have been uniformly mixed in accordance with the corresponding mass ratio, stir again and let stand for 5 minutes. Use plate filter press and control its water content to 15%, granu...

Embodiment 2

[0016] Embodiment 2: The method for preparing sludge ceramsite by using ceramsite and flue ash regeneration, the raw material used and its mass percentage are pulverized coal with a water plant wet sludge 60% (moisture content 80%) and a particle size of less than 5mm Gray clay sand 20%, ceramsite calcined fly ash 15% (the flue fly ash captured by the dust collector due to the burning of rice bran agricultural waste during the preparation of ceramsite), the purity is more than 80%, and the fineness is less than 0.01mm 2% of ferrous polysilicate powder, 2.5% of high alumina cement, and 0.5% of polycarboxylate superplasticizer with a concentration greater than 40wt.%. After 80°C, add wet sludge, ceramsite calcined fly ash, polysilicate ferrous silicate, high alumina cement and polycarboxylate water reducer, etc., which have been uniformly mixed in accordance with the corresponding mass ratio, stir again and let stand for 10 minutes. Use plate filter press and control its water c...

Embodiment 3

[0017] Example 3: A method for preparing sludge ceramsite by regenerating ceramsite and flue ash, the raw materials used and their mass percentages are 50% (moisture content 70%) of water plant wet sludge and shale with a particle size of less than 5mm Ceramic sand 37.9%, ceramsite calcined fly ash 10% (the flue fly ash captured by the dust collector due to the burning of rice husk agricultural waste during the preparation of ceramsite), the purity is over 80%, and the fineness is less than 0.01mm 1% of ferrous polysilicate powder, 1% of high alumina cement, and 0.1% of polycarboxylate superplasticizer with a concentration greater than 40wt.%. After 60-80°C, add wet sludge, ceramsite calcined fly ash, polysilicate ferrous silicate, high alumina cement and polycarboxylate superplasticizer, etc., which have been mixed uniformly in accordance with the corresponding mass ratio, stir again and let stand 8min, use plate filter press and control its moisture content to 20%, granulate...

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Abstract

The present invention particularly relates to a method for preparing sludge ceramsite by regenerating pottery sand. The method comprises: pre-heating pottery sand by using tail gas prepared by using ceramsite to achieve a temperature of 60-80 DEG C, adding a uniformly-pre-mixed mixture comprising wet sludge, ceramsite calcining fly ash, ferrous polysilicate, high aluminum cement and a polycarboxylate water reducer according to a corresponding mass ratio, uniformly stirring again, standing for 5-10 min, carrying out plate-type pressure filtration, controlling the moisture content of 15-25%, granulating through a granulator, drying for 9-15 min at a temperature of 100-110 DEG C, pre-firing at a temperature of 500-600 DEG C, and carrying out rapid firing to a temperature of 1200-1250 DEG C. According to the present invention, the method has advantages of high sludge utilization rate, short preparation time, low secondary pollution, and the like.

Description

technical field [0001] The invention specifically relates to a method for preparing sludge ceramsite by regenerating ceramsite, which is mainly used for waste recycling and preparation of new building materials. Background technique [0002] Ceramic sand is the fine aggregate produced by crushing during the production of ceramsite, and is often used to prepare lightweight aggregate concrete or lightweight mortar; however, the water absorption rate of ceramic sand is often as high as 40% When using mortar, it will bring problems such as poor workability and large fluctuations in quality. [0003] Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloidal sludge, etc. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and the particles are finer, the specific gravity is smaller, and it is in a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 易举然
Owner 宜昌朗天新型建材有限公司
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