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Method for preparing ceramicadsorption material by using fly ash

An adsorption material and fly ash technology, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., can solve the problems of difficult industrial production, complicated preparation process, expensive price, etc., and achieve good phenol adsorption capacity, The effect of simple process and low cost

Inactive Publication Date: 2016-12-14
TSINGHUA INNOVATION CENT IN DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the current technology of using fly ash to prepare adsorption materials, the present invention aims to use fly ash as the main raw material to prepare a geopolymer porous adsorption material, which can effectively alleviate the pollution problem of fly ash, and It can overcome the problems of complex preparation process of adsorption materials, waste alkali, high price, low temperature resistance, and difficult industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 500g of fly ash and 150g of graphite powder (the ratio of 5μm and 15μm is 1:1), and mix them evenly for later use;

[0031] (2) Weigh 20g NaOH and 80g sodium water glass, mix and stir until the NaOH is completely dissolved, and cool to obtain an alkali activator;

[0032] (3) adding an alkali activator to the powder obtained in step (1) while stirring, and after mixing uniformly, a mixed powder is obtained, which is in a semi-dry powder state;

[0033] (4) Place the above mixed powder in a granulator for granulation, and spray 100 mL of 1wt% cetyltrimethylammonium bromide aqueous solution while granulating;

[0034] (5) Put the granulated granules into a sealed bag for sealing, wet curing at 70°C for 24 hours, then take out from the sealed bag, dry at 120°C, and calcinate at 800°C for 2 hours to prepare a porous ceramic adsorbent material.

[0035] (6) The prepared adsorption material has a good adsorption effect on phenolic substances, and its phenol adsorpt...

Embodiment 2

[0037] (1) Weigh 400g of fly ash and 120g of PMMA microspheres (1:1 ratio of 5μm and 15μm), and mix them evenly for later use;

[0038] (2) Weigh 16g of NaOH and 64g of sodium water glass, mix and stir until the NaOH is completely dissolved, and cool to obtain an alkali activator;

[0039] (3) adding an alkali activator to the powder obtained in step (1) while stirring, and after mixing uniformly, a mixed powder is obtained, which is in a semi-dry powder state;

[0040] (4) Place the above mixed powder in a granulator for granulation, and spray 80 mL of 1wt% cetyltrimethylammonium bromide aqueous solution while granulating;

[0041] (5) Put the granulated granules into a sealed bag to seal, wet curing at 60°C for 24 hours, then take out from the sealed bag, dry at 100°C, and calcinate at 900°C for 2 hours to prepare a porous ceramic adsorbent material.

[0042] (6) The prepared adsorption material has a good adsorption effect on phenolic substances, and its phenol adsorption ...

Embodiment 3

[0044] (1) Weigh 500g of fly ash and 150g of microcrystalline cellulose (5μm), and mix them evenly for later use;

[0045] (2) Weigh 19.6g NaOH and 80.5g sodium water glass, mix and stir until the NaOH is completely dissolved, and cool to obtain an alkali activator;

[0046] (3) adding an alkali activator to the powder obtained in step (1) while stirring, and after mixing uniformly, a mixed powder is obtained, which is in a semi-dry powder state;

[0047] (4) Place the above mixed powder in a granulator for granulation, and spray 80 mL of 1wt% sodium dodecyl sulfonate aqueous solution while granulating;

[0048] (5) Put the granulated granules into a sealed bag to seal, wet curing at 80°C for 24 hours, then take out from the sealed bag, dry at 90°C, and calcinate at 900°C for 2 hours to prepare a porous ceramic adsorbent material.

[0049] (6) The prepared adsorption material has a good adsorption effect on phenolic substances, and its phenol adsorption value can reach 65 mg / ...

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Abstract

The invention provides a method for preparing a ceramicadsorption material by using fly ash. The method comprises the steps that 1, fly ash and a pore forming agent are weighed and are mixed evenly; 2, caustic soda flakes and water glass are weighed, mixed and stirred till the caustic soda flakes are completely dissolved, and cooling is performed to obtain analkaliactivator; 3, the alkaliactivator is added while the powder in the step 1 is stirred, and semi-dried mixed powder is obtained after even mixing; 4, a proper amount of aqueous surfactant solution is added to the semi-dried mixed powder obtained in the step 3, and a sample is obtained through forming in a granulation or pouring mode; 5, the formed sample is subjected to wet maintenance for 12-24 hours, and the maintained sample is dried and calcined to prepare the ceramicadsorption material. The method utilizes the fly ash as a main raw material to prepare the geopolymerporous adsorption material, the pollution problem of the fly ash can be effectively relieved, and the problems of complicated preparation process, alkali waste production, high price, high temperature non-resistance, difficult industrial production and the like of the adsorption material can be also solved.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization and environmental treatment, and particularly relates to a method for preparing ceramic adsorption materials from fly ash. Background technique [0002] As a kind of solid waste, fly ash is mainly the residual ash produced by the combustion of coal in thermal power plants. In my country, the stacking amount is huge and the utilization rate is low. Long-term stacking will pollute the environment and endanger human health. Therefore, it is very necessary to provide a new way for the resource utilization of fly ash. The use of fly ash to prepare adsorption materials is a new way of utilization. Geopolymer porous materials prepared from fly ash are a new type of inorganic high molecular polymer generated at lower temperatures. It is cheap and easy to obtain, simple in preparation method, high temperature resistance, easy to regenerate, has a three-dimensional network structure and zeo...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/34
CPCB01J20/103C02F1/281C02F2101/345
Inventor 贾屹海赵凯常杰善王希宏何伟发
Owner TSINGHUA INNOVATION CENT IN DONGGUAN
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