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A preparing method of a lightweight ceramsite biological filter material

A technology of biological filter materials and lightweight ceramsite, applied in ceramic products, separation methods, chemical instruments and methods, etc., can solve the problems of high calcination temperature, small specific surface area, poor hydrophilicity, etc., and achieve high particle strength, specific The effect of large surface area and strong hydrophilicity

Inactive Publication Date: 2017-02-15
清水源(上海)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, lightweight ceramsite biological filter materials generally have the following disadvantages: high calcination temperature, small specific surface area, poor hydrophilicity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of raw materials: mix 40kg of attapulgite clay and 30kg of lightweight materials for the inner core; mix 50kg of attapulgite clay and 10kg of pore-forming agent for the outer shell; glue preparation: mix 0.1kg of binder with 40kg of water .

[0024] 2. Granulation: Send the core ingredients into the granulator to granulate to obtain core particles with a particle diameter of about 2.5mm; then send the shell ingredients into the granulator to obtain spherical particles with a particle diameter of 3mm, and spray glue while spraying While feeding the shell ingredients, the glue accounts for about 20%wt of the spherical particles.

[0025] 3. Drying: Dry the above-mentioned spherical particles at 200°C for 0.5h to remove moisture.

[0026] 4. Roasting: put the above-mentioned dried spherical particles in the range of 500° C. and roast for 2 hours to obtain light-weight ceramsite biological filter material.

Embodiment 2

[0028] 1. Preparation of raw materials: For core ingredients, mix 45kg of kaolin, 35kg of light materials and 2.5kg of pore-forming agent; for shell ingredients, mix 52.5kg of kaolin and 12.5kg of pore-forming agent; Glue preparation: 0.3kg of binder and water 37kg mixed.

[0029] 2. Granulation: Send the core ingredients into the granulator for granulation to obtain core particles with a particle diameter of about 3.5mm; then send the shell ingredients into the granulator to obtain spherical particles with a particle diameter of 4mm, and spray glue on the side While feeding the shell ingredients, the glue accounts for about 22.5%wt of the spherical particles.

[0030] 3. Drying: Dry the above-mentioned spherical particles at 300°C for 1 hour to remove moisture.

[0031] 4. Roasting: put the dried spherical particles in the range of 800° C. for 0.5 h to get light ceramsite biological filter material.

Embodiment 3

[0033] 1. Preparation of raw materials: mix 50 kg of diatomite, 40 kg of lightweight materials and 5 kg of pore-forming agent for inner core ingredients; mix 55 kg of diatomite and 15 kg of pore-forming agent for shell ingredients; glue preparation: 0.5 kg of binder and Mix 41kg of water.

[0034] 2. Granulation: Send the core material into the granulator to granulate to obtain core particles with a particle diameter of 4.5mm; then send the shell ingredients into the granulator to obtain spherical particles with a particle diameter of 5mm, and spray the glue while sending Into the shell ingredients, the glue accounts for about 25%wt of the spherical particles.

[0035] 3. Drying: Dry the above-mentioned spherical particles at 220°C for 0.5h to remove moisture.

[0036] 4. Roasting: put the dried spherical particles at 600° C. for 1.5 hours to obtain light-weight ceramsite biological filter material.

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Abstract

The invention relates to a preparing method of a lightweight ceramsite biological filter material. The filter material is prepared by subjecting clay mineral, a lightweight material, a pore forming agent and a binder which are adopted as raw materials to high-temperature calcinating, wherein the lightweight material adopts an inorganic material the true density of which is about 0.23 g / cm<3>. The method includes (1) a step of raw material preparation, namely a step of inner core matching, outer shell matching and glue preparing, namely a step of mixing the clay, the lightweight material and the pore forming agent, mixing the clay and the pore forming agent, and mixing the binder and water, respectively, (2) a step of granulation, namely a step of feeding the inner core matching material into a granulating machine, granulating to obtain inner core granules, feeding the outer shell matching material into the granulating machine, and granulating to obtain spherical granules, with the glue being sprayed at the same time of feeding of the outer shell matching material, (3) a step of drying, namely a step of drying the spherical granules to remove water, and (4) a step of calcinating, namely a step of calcinating the dried spherical granules to obtain the lightweight ceramsite biological filter material.

Description

technical field [0001] The invention relates to a lightweight ceramsite biological filter material with clay as the main raw material, which is used for deep purification of sewage and belongs to the field of water treatment technology and deep processing of environmental protection materials. Background technique [0002] At the end of the last century, natural mineral materials were basically used as ceramsite filter materials. The main reason is that compared with organic plastic materials, it has the advantages of wide source, low price, high mechanical strength and good chemical stability. Therefore, it was applied earlier and widely used in Water treatment field. However, long-term practical experience shows that natural mineral filter materials have many shortcomings such as different shapes and sizes, small specific surface area, small porosity, and poor pollution interception ability. Therefore, the transformation from natural materials to artificial materials is an...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B33/00B01D39/20C02F1/00
CPCC04B38/009B01D39/2075B01D39/2093C02F1/001C04B33/00C04B2235/94C04B38/0675C04B38/0665C04B38/068
Inventor 姜中生黄晓亮张扬傅燎原
Owner 清水源(上海)环保科技有限公司
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