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Attapulgite ceramic filter material

A technology of ceramsite filter material and attapulgite, which is applied in the fields of filtration and separation, alkali metal oxide/hydroxide, inorganic chemistry, etc., and can solve the effects of weakening the physical and chemical properties of attapulgite, colloidal properties, and adsorption of attapulgite and other problems, to achieve the effect of cost reusable, low cost and good stability

Inactive Publication Date: 2018-11-06
LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of these impurities weakens the overall physical and chemical properties of attapulgite, which greatly affects the colloidal and adsorption properties of attapulgite in industrial applications.
[0003] At present, there is no attapulgite filter material for water treatment to be popularized and used, and attapulgite ceramic filter material has a broad market

Method used

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  • Attapulgite ceramic filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] An attapulgite ceramsite filter material, comprising the steps of:

[0049] A. Material selection processing

[0050] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0051] B. Pulping

[0052] Add attapulgite clay into water and stir at room temperature, the solid-to-liquid weight ratio is 1:20, fully stir for 15 minutes to make pulp;

[0053] C, shear, disperse

[0054] Add a dispersant to the slurry, the dispersant is sodium polyacrylate, sodium hexametaphosphate or sodium pyrophosphate, the amount of the dispersant added is 0.1-3% of the weight of the attapulgite clay, the suspension is formed after stirring for 15 minutes, and the suspension is placed Shearing and dispersing in a high-speed shearing machine, after being centrifuged by a centrifuge, the upper layer slurry is dehydrated and dried to obtain high-purity attapulgite powder;

[0055] D. acid activation

[0056] Using high-purity attapulgite powder as...

Embodiment 2

[0062] An attapulgite ceramsite filter material, comprising the steps of:

[0063] A. Material selection processing

[0064] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0065] B. Pulping

[0066] Add attapulgite clay into water and stir at room temperature, the solid-to-liquid weight ratio is 1:20, fully stir for 15 minutes to make pulp;

[0067] C, shear, disperse

[0068] Add a dispersant to the slurry. The dispersant is sodium polyacrylate, sodium hexametaphosphate or sodium pyrophosphate. The amount of the dispersant added is 0.1-3% of the weight of the attapulgite clay. After stirring for 15 minutes, a suspension is formed, and the suspension is placed in Shearing and dispersing in a high-speed shearing machine, after being centrifuged by a centrifuge, the upper layer slurry is dehydrated and dried to obtain high-purity attapulgite powder;

[0069] D. acid activation

[0070] Using high-purity attapulgite powder ...

Embodiment 3

[0076] An attapulgite ceramsite filter material, comprising the steps of:

[0077] A. Material selection processing

[0078] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0079] B. Pulping

[0080] Add attapulgite clay into water and stir at room temperature, the solid-to-liquid weight ratio is 1:20, fully stir for 15 minutes to make pulp;

[0081] C, shear, disperse

[0082] Add a dispersant to the slurry. The dispersant is sodium polyacrylate, sodium hexametaphosphate or sodium pyrophosphate. The amount of the dispersant added is 0.1-3% of the weight of the attapulgite clay. After stirring for 15 minutes, a suspension is formed, and the suspension is placed in Shearing and dispersing in a high-speed shearing machine, after being centrifuged by a centrifuge, the upper layer slurry is dehydrated and dried to obtain high-purity attapulgite powder;

[0083] D. acid activation

[0084] Using high-purity attapulgite powder ...

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Abstract

The invention relates to a ceramic filter material and in particular relates to an attapulgite ceramic filter material. A method for preparing an extrusion type ceramic filter material by purifying attapulgite clay by using a wet method comprises the following steps: uniformly stirring and mixing materials, kneading into dough, carrying out extrusion molding, and implementing drying and roasting procedures, thereby obtaining a finished product. Pollutants in a water body can be effectively adsorbed and purified, harmful gases such as NOx, VOCs (Volatile Organic Chemicals), NH3, H2S and SO2 canbe efficiently removed, and meanwhile the attapulgite ceramic filter material has the advantages of being high in mechanical strength, small in air tightness, large in porosity and specific surface area, large in adsorption capacity, good in stability, low in cost, recyclable, renewable and reuseable, and the like.

Description

technical field [0001] The invention relates to a ceramic filter material, in particular to an attapulgite ceramsite filter material. Background technique [0002] Attapulgite refers to a natural non-metallic clay mineral with attapulgite as the main mineral component, which belongs to the sepiolite group in mineralogy. Natural attapulgite has certain mineralogical limitations. Minerals contain a considerable proportion of symbiotic and associated impurities. The impurities are mainly montmorillonite, containing a small amount of illite and illite-montmorillonite mixed layer minerals, common carbonate minerals (mainly dolomite, a small amount of calcite) and various forms of silicon Oxides (quartz, microcrystalline opal, amorphous opal, etc.), also contain trace amounts of apatite, pyrolusite, epidote, magnetite, etc. The mineral composition of attapulgite varies widely with different ore types. The presence of these impurities weakens the physical and chemical properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/06B01J20/12B01J20/28B01J20/30C04B33/13C04B33/32
CPCB01D39/06B01J20/12B01J20/28004B01J20/28016C04B33/13C04B33/1305C04B33/32
Inventor 任珺陶玲杨宜珺曹天轶张倩
Owner LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH
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