Zeolite ceramisite filter material prepared by gangue and preparation method of zeolite ceramisite filter material

A technology of coal gangue and zeolite, which is applied in the field of new environmental functional materials, zeolite ceramsite filter material with composite pore structure and its preparation, can solve the difficulty of solid-liquid separation, limit the removal effect and rate of pollutants in water, and cannot effectively remove heavy metal pollutants, etc. problems, to achieve the effect of reducing environmental hazards

Inactive Publication Date: 2014-10-01
INNER MONGOLIA UNIVERSITY
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AI Technical Summary

Problems solved by technology

The physical and chemical properties of the current ceramsite fillers limit its removal effect and rate of pollutants in water, and it cannot effectively remove heavy metal pollutants that are more harmful to the environment in water bodies. Therefore, the current application of ceramsite filter materials in wastewater treatment Limited to simple filtration or biofilms
[0004] Zeolite is an inorganic porous material with a large specific surface area, adsorption capacity, and ion exchange capacity. It has been applied to a certain extent in the process of wastewater treatment. However, most of the synthetic zeolites are zeolite powders. Solid-liquid separation brings some difficulties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 2 kg of coal gangue and crush it with a hammer into coal gangue particles with a diameter of less than 5 cm. Put the coal gangue particles into the ball mill, run it at 300 rpm for 15 minutes, and take out the obtained powder. Mix the powder, rice husk ash, and water in a weight ratio of 20:1:3, and stir evenly to make a slurry. The slurry is made into balls with a diameter of 10-15mm by using a ball forming disc. The pellets are put into a muffle furnace for sintering, the sintering temperature is 1000°C, and the temperature is kept for 10 minutes. Put the obtained coal gangue ceramsite into a closed heatable reaction kettle, and add NaOH solution with a concentration of 1mol / L, and the solid-liquid ratio is 1 / 5. The solid-liquid mixture in the kettle was stirred for 3 minutes, then the reaction kettle was heated to 100° C., and kept at this temperature for 5 hours. After the reaction is completed, solid-liquid separation is achieved by filtration, and the obta...

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Abstract

The invention discloses a zeolite ceramisite filter material prepared by gangue and a preparation method of the zeolite ceramisite filter material. The zeolite ceramisite filter material is prepared by taking a large amount of gangue waste generated by China every year as a main raw material through technological means of sintering, hydro-thermal treatment and the like. The technology has the following key points that 1, the gangue is sintered into a ceramsite material with multiple holes inside, and 2 the surface of ceramsite is transformed into a zeolite structure through alkaline water heat treatment. The prepared multi-hole biological filter material has a multi-level hole structure, the density is close to that of water, the zeolite ceramisite filter material is applied in technologies such as biological aerated filters, oxidation ditches in the field of sewage treatment, and meanwhile, the zeolite ceramisite filter material has a biological film hanging function and a heavy metal ion adsorbing removing function and the like.

Description

technical field [0001] The invention relates to a composite pore structure zeolite ceramsite filter material with coal gangue as the main raw material and a preparation method thereof, which also includes high value-added resource utilization technology of coal gangue, and belongs to the field of comprehensive utilization of environmental functional materials and solid waste resources. The zeolite ceramsite filter material is a multi-functional, high-performance porous water treatment biological filler, which belongs to a new type of environmental functional material. This product is suitable for the treatment of wastewater containing multiple pollutants (heavy metals, BOD, ammonia nitrogen, total phosphorus). This product has the advantages of large specific surface area and high adsorption performance, especially for the control of sudden pollution sources. Background technique [0002] Coal gangue is the main solid waste discharged from coal mines. According to statisti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20C04B38/00C04B41/80
Inventor 王川赵吉许继飞付志敏于瑞宏
Owner INNER MONGOLIA UNIVERSITY
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