Preparation method and application of fly ash defluorination agent

A technology of fly ash and fluoride removal agent, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc., can solve problems such as limited application fields, uneven regional distribution, hidden dangers of ecological environment pollution, etc., and achieve good adsorption , High adsorption efficiency and large adsorption capacity

Inactive Publication Date: 2018-07-24
XILINGOL VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In CN100593433C, brick red soil and aluminum salt are used as raw materials; in CN106975440A, kaolin and sodium hydroxide are used as raw materials; in CN105858783A, aluminum sulfate and sodium metaaluminate are used as raw materials to prepare defluorinating agent, and fly ash is not used as raw

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] A preparation method of fly ash fluoride remover, including the following steps:

[0026] (1) Ingredients: fully mix fly ash and clay;

[0027] (2) Forming: adding water, granulating, making ceramsite, and drying;

[0028] (3) Burning: Put the dried ceramsite into the kiln, heat up to 200-300°C for 5-30 minutes, continue to heat up to 950-1150°C for 5-30 minutes, and take it out after natural cooling;

[0029] (4) Activation: the fired ceramsite is soaked in acid, alkali or salt solution, filtered and dried to obtain the fly ash fluoride removal agent.

[0030] In the present invention, the clay is used as a binder in the ceramsite, and the water is used to mix with various raw materials to facilitate granulation. In the present invention, the granulation step can be granulated by a disc granulator. In a specific embodiment of the present invention, the fly ash comes from the Xilin Gol League Power Plant in Inner Mongolia, the sodium hydroxide is purchased from Tianjin Beilian ...

Example Embodiment

[0038] Example 1

[0039] A preparation method of fly ash fluoride remover, including the following steps:

[0040] (1) Ingredients: fully mix 400g fly ash, 5g sodium hydroxide, and 75g clay;

[0041] (2) Forming: Add 50g of water, granulate with a disc granulator to make ceramsite with a particle size of 0.2-2cm, and place it in an oven at 40°C for drying;

[0042] (3) Burning: Put the dried ceramsite into the kiln, heat up to 300°C for 10 minutes, continue to heat up to 1150°C for 30 minutes, and take it out after natural cooling;

[0043] (4) Activation: The fired ceramsite was ultrasonically immersed in a hydrochloric acid solution with a liquid-to-solid ratio of 10 and 3M for 1 hour, filtered and dried in an oven at 100°C to obtain a fly ash fluoride removal agent.

[0044] Effect test method:

[0045] At room temperature, weigh 3g fly ash defluoride agent and add it to a 50mL, 1000mg / L fluorine-containing solution conical flask, place it in a shaker and oscillate for 20 minutes, use...

Example Embodiment

[0046] Example 2

[0047] A preparation method of fly ash fluoride remover, including the following steps:

[0048] (1) Ingredients: fully mix 400g fly ash and 75g clay;

[0049] (2) Forming: Add 50g of water, granulate with a disc granulator to make ceramsite with a particle size of 0.2-2cm, and place it in an oven at 40°C for drying;

[0050] (3) Burning: Put the dried ceramsite into the kiln, heat up to 300°C for 10 minutes, continue to heat up to 1150°C for 30 minutes, and take it out after natural cooling;

[0051] (4) Activation: The fired ceramsite was ultrasonically immersed in a hydrochloric acid solution with a liquid-to-solid ratio of 10 and 3M for 1 hour, filtered and dried in an oven at 100°C to obtain a fly ash fluoride removal agent.

[0052] The effect test method is the same as in Example 1.

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PUM

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Abstract

The invention relates to the field of preparation of defluorination agents, and concretely relates to a preparation method and an application of a fly ash defluorination agent. The preparation methodof the fly ash defluorination agent comprises the following steps: fully mixing fly ash with clay; adding water, granulating the obtained mixture to prepare ceramsite, and drying the ceramsite; placing the dried ceramsite in a kiln, heating the kiln to 200-300 DEG C, keeping the temperature for 5-30 min, continuously heating the kiln to 950-1150 DEG C, keeping the temperature for 5-30 min, naturally cooling the obtained ceramsite, and taking out the ceramsite; and immersing the sintered ceramsite in an acid, alkali or salt solution, filtering the immersed ceramsite, and drying the filtered ceramsite to obtain the fly ash defluorination agent. The preparation method has the advantages of recycling of the industrial waste solid fly ash, low raw material cost and great social benefits. The fly ash defluorination agent has the advantages of good adsorptivity, high fluorine ion adsorption efficiency and large adsorption capacity. The fly ash defluorination agent can be used as an adsorbentfor a simple water treater, and can adsorb fluorine ions after being directly added to high-fluorine water and stirred.

Description

technical field [0001] The invention relates to the field of preparation of a fluoride-removing agent, in particular to a preparation method and application of a fly ash-removing agent. Background technique [0002] Fluorine is one of the essential trace elements for the human body, but excessive amounts can cause chronic fluorosis, cause symptoms of fluorosis such as bone fluorosis and dental fluorosis, and even lead to arteriosclerosis. Large areas of groundwater in Northwest my country have high fluoride content, about 2-3mg / L. Most of the agricultural and pastoral areas drink groundwater directly, and endemic fluorosis is seriously harmful. Improving the quality of drinking water in agricultural and pastoral areas has a great impact and far-reaching significance. [0003] The adsorption method is the most widely used method for defluoridation of drinking water due to its advantages of simple operation, stable effect, and economical feasibility. Commonly used fluorine r...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/14
CPCB01J20/041B01J20/08B01J20/103C02F1/281C02F2101/14
Inventor 石建萍张怀宇侯泽健
Owner XILINGOL VOCATIONAL COLLEGE
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