Purifying and extruding attapulgite ceramisite filter material

A ceramsite filter material and attapulgite technology, applied in filtration separation, membrane filter, water/sludge/sewage treatment, etc., can solve the problem of weakening the physical and chemical properties of attapulgite, the colloidal and adsorption properties of attapulgite And other issues

Inactive Publication Date: 2016-03-16
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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  • Purifying and extruding attapulgite ceramisite filter material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A purified extruded attapulgite ceramsite filter material comprises the following steps:

[0043] A. Material selection processing

[0044] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0045] B. Pulping

[0046] 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;

[0047] C, shear, disperse

[0048] 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% of the weight of the attapulgite clay. After stirring for 15 minutes, a suspension is formed, and the suspension is placed in a high-speed Shearing and dispersion in the shearing machine, after centrifugation, dehydration and drying of the upper slurry after centrifugation, to obtain high-purity attapulgite powder;

[0049] D. acid activation

[0050] Using high-pur...

Embodiment 2

[0056] A purified extruded attapulgite ceramsite filter material comprises the following steps:

[0057] A. Material selection processing

[0058] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0059] B. Pulping

[0060] 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;

[0061] C, shear, disperse

[0062] Add a dispersant to the slurry. The dispersant is sodium polyacrylate, sodium hexametaphosphate or sodium pyrophosphate. The amount of the dispersant added is 2% of the weight of the attapulgite clay. After stirring for 15 minutes, a suspension is formed, and the suspension is placed in a high-speed Shearing and dispersion in the shearing machine, after centrifugation, dehydration and drying of the upper slurry after centrifugation, to obtain high-purity attapulgite powder;

[0063] D. acid activation

[0064] Using high-purity ...

Embodiment 3

[0070] A purified extruded attapulgite ceramsite filter material comprises the following steps:

[0071] A. Material selection processing

[0072] The attapulgite clay is dried to reduce the moisture content of the attapulgite clay to 30%-45%;

[0073] B. Pulping

[0074] 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;

[0075] C, shear, disperse

[0076] Add a dispersant to the slurry. The dispersant is sodium polyacrylate, sodium hexametaphosphate or sodium pyrophosphate. The amount of the dispersant added is 3% of the weight of the attapulgite clay. After stirring for 15 minutes, a suspension is formed, and the suspension is placed in a high-speed Shearing and dispersion in the shearing machine, after centrifugation, dehydration and drying of the upper slurry after centrifugation, to obtain high-purity attapulgite powder;

[0077] D. acid activation

[0078] Using high-purit...

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Abstract

The invention relates to ceramic filtration materials, in particular to a purifying and extruding attapulgite ceramisite filter material. A method for preparing the extruding ceramisite filter material by performing wet purification on attapulgite clay lies in that after purification, attapulgite clay is stirred, uniformly blended, kneaded, extruded for shaping, and is further dried and roasted to obtain the finished product. The purifying and extruding attapulgite ceramisite filter material provided by the invention can efficiently adsorb and purify pollutants in the water, and can also be used for efficiently removing harmful gases such as NOx, VOCs, NH3, H2S and SO2, and the advantages of high mechanical strength, small air resistance, high air porosity, large specific surface area, high adsorption capacity, good stability, low cost, reusability and reproducibility can be achieved.

Description

technical field [0001] The invention relates to a ceramic filter material, in particular to a purified extruded 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 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 propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/06C02F1/28B01D53/02
CPCB01D39/06B01D53/02B01D2239/0208B01D2253/11C02F1/281
Inventor 任珺陶玲赵乾程关正义闫洁
Owner LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH
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