Preparation method of ceramsite filter material for water treatment

Abstract

The invention provides a preparation method for a ceramsite filter material for water treatment. The method is characterized by comprising the following steps: (1) mixing Bayer red mud powder in aluminum manufacturers in Shangdong province, river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province, gangue powder and a pore forming agent according to a mass ratio of 40-50:40-50:0-5:5-10 to obtain a mixture; (2) putting the mixture into a pan granulator and adding water, the mass of which is 20 to 25% of the mixture, for granulation into spherical particles with phi being 3 to 10 mm; (3) sintering and cooling the spherical particles after drying so as to obtain the ceramsite filter material. According to the invention, Bayer red mud powder in aluminum manufacturers in Shangdong province and river sediment powder in Xiaofu River at the section of Huangtuya in Zibo city of Shangdong province are used as the main raw materials and added at an equal or substantially equal amount, and a small amount of the pore forming agent is blended for the preparation of the ceramsite filter material; therefore, low cost is realized, the problem of flood passage capability of rivers is overcome, and environment pollution and land occupation caused by accumulation of Bayer red mud are simultaneously eliminated.

Description

technical field [0001] The invention provides a preparation method of ceramsite filter material for water treatment, which belongs to the technical field of preparation of waste water purification treatment materials and environmental materials. Background technique [0002] For a long time, the filter materials in my country's sewage treatment process mainly use irregular fillers such as sand, stone, coke, slag, anthracite, and plastic honeycomb fillers, corrugated fillers and fiber fillers. These fillers or filter materials have defects to varying degrees, such as irregular filter materials with high water flow resistance, easy to block, and difficult backwashing; plastic filter materials have poor film-hanging performance and are easy to age. The ceramsite filter material used in the biological aerated filter that has emerged in recent years is mainly fired from natural resource clay, which will consume a large amount of clay resources and cost high. Xie Xiangli and othe...

AI Technical Summary

Problems solved by technology

These fillers or filter materials have defects to varying degrees, such as irregular filter materials with high water flow resistance, easy to block, and difficult backwashing; plastic filter materials have poor film-hanging performance and are easy to age, etc.

The ceramsite filter material used in the biological aerated filter that has emerged in recent years is mainly fired from natural resource clay, which will consume a large amount of clay resources and cost high

Xie Xiangli and others used Guangxi Pingguo Aluminum Company Bayer process red mud, cullet, natural resource bentonite, starch, etc. to carry out experimental research on the preparation of water treatment ceramsite filter material. The defect of this method is that it needs to consume natural resources bentonite and Starch, high cost

The author has used the Bayer process red mud of Shandong Aluminum Plant as the main raw material and the bottom mud of the loess cliff section of the Xiaofu River in Zibo as the main raw material to carry out experimental research on the preparation of water treatment ceramsite filter materials. The results show that: Mud is the main raw material, and only a small amount of bottom mud and fly ash of the Huangtuya section of Xiaofu River in Zibo are added to prepare water treatment ceramsite filter material. Although the prepared ceramsite can meet the standard, there are still large ceramsite density and obvious pores. The problem of low pore rate and small pore diameter may be caused by the addition of too much red mud in the Bayer process or insufficient pore-forming agent. If the above-mentioned ceramsite is used for wastewater treatment, it will not only increase the cost of the water treatment process Head loss, and the effect of adsorbing organic macromolecular pollutants is not good; the main raw material is the bottom mud of the loess cliff section of the Xiaofu River in Zibo, and only a small amount of fly ash, Bayer process red mud from Shandong Aluminum Plant and made If the pore agent is used, the ceramsite with many openings, large pore size, and small density can be prepared, and the indicators meet the product standards of "Artificial Ceramsite Filter Material for Water Treatment", but it cannot solve the problem of Bayer's process at the Shandong Aluminum Factory in Zibo City at the same time. Problems with massive buildup of mud

So far, the Bayer method red mud and river sediment with high organic matter content and clay content are used as the main raw materials, and the two are added in equal amounts or basically equal amounts, and then mixed with a small amount of coal powder and other pore-forming agents to prepare water treatment Ceramsite filter material has not been reported

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