Novel defluorination material and preparation process thereof

A preparation process and technology of fluorine materials, which are applied in the field of fluoride removal materials and their preparation processes, can solve the problems of slow sedimentation rate, lower calcium salt utilization efficiency, failure to meet environmental protection standards, etc., and achieve the effect of improving sedimentation efficiency and specific gravity

Pending Publication Date: 2021-05-11
苏州博睿特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The most common application of the existing technology is the traditional lime precipitation process, which usually uses the primary or secondary precipitation method to effectively purify and remove fluorine-containing wastewater, but its disadvantage is that the generated CaF 2 The precipitate will be wrapped in Ca(OH) 2 The surface of the particles reduces the utilization efficiency of calcium salt, the rate of sediment formation is slow, and the sedimentation characteristics of the sediment are poor; and its removal of fluoride ions is not thorough, and it cannot meet environmental protection standards. Usually, only a fluorine concentration of 20mg / L is applicable. The above waste water defluoride, there is a fluoride treatment limit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A new type of defluoridation material, comprising the following components in parts by weight, 42 parts of calcined coal gangue, 8 parts of alumina balls, 24 parts of polyaluminum chloride, 3 parts of aluminum sulfate, 3 parts of sodium metaaluminate, chlorinated 9 parts of iron, 5 parts of polydimethyldiallylammonium chloride, 150 parts of water glass, 2 parts of calcium stearate and 1 part of foam stabilizer.

[0024] The preparation method is as follows: S1) Accurately weigh the raw materials of each component, wherein the particle size of the calcined coal gangue is 255 mesh, the particle diameter of the alumina ball is 1mm, and the modulus of the water glass is 1.8; S2) the calcined coal gangue, the oxidized Aluminum balls, polyaluminum chloride, aluminum sulfate, sodium metaaluminate, ferric chloride, polydimethyldiallylammonium chloride and foam stabilizer are mixed evenly, added to the water glass and stirred evenly, and the stirring speed is 180 -200r / min, the ...

Embodiment 2

[0026] A new type of defluoridation material, comprising the following components in parts by weight, 48 parts of calcined coal gangue, 6 parts of alumina balls, 23 parts of polyaluminum chloride, 3 parts of aluminum sulfate, 2 parts of sodium metaaluminate, 8 parts of iron, 3 parts of polydimethyldiallylammonium chloride, 160 parts of water glass, 2 parts of calcium stearate and 2 parts of foam stabilizer.

[0027] The preparation method is as follows: S1) Accurately weigh the raw materials of each component, wherein the particle size of calcined coal gangue is 260 mesh, the particle diameter of alumina balls is 1 mm, and the modulus of water glass is 1.8; S2) Calcined coal gangue, oxidized Aluminum balls, polyaluminum chloride, aluminum sulfate, sodium metaaluminate, ferric chloride, polydimethyldiallylammonium chloride and foam stabilizer are mixed evenly, added to the water glass and stirred evenly, and the stirring speed is 180 -200r / min, the stirring time is 5-10min, and...

Embodiment 3

[0029] A new type of defluoridation material, comprising the following components in parts by weight, 37 parts of calcined coal gangue, 12 parts of alumina balls, 21 parts of polyaluminum chloride, 2 parts of aluminum sulfate, 3 parts of sodium metaaluminate, 13 parts of iron, 3 parts of polydimethyldiallylammonium chloride, 160 parts of water glass, 3 parts of calcium stearate and 2 parts of foam stabilizer.

[0030] The preparation method is as follows: S1) Accurately weigh the raw materials of each component, wherein the particle size of the calcined coal gangue is 270 mesh, the particle size of the alumina ball is 2mm, and the modulus of the water glass is 1.8; S2) the calcined coal gangue, the oxidized Aluminum balls, polyaluminum chloride, aluminum sulfate, sodium metaaluminate, ferric chloride, polydimethyldiallylammonium chloride and foam stabilizer are mixed evenly, added to the water glass and stirred evenly, and the stirring speed is 180 -200r / min, the stirring time...

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Abstract

The invention discloses a novel defluorination material and a preparation process thereof. The defluorination material comprises the following components in parts by weight: 35-50 parts of calcined coal gangue, 5-12 parts of alumina balls, 25-30 parts of aluminum salt, 8-13 parts of ferric chloride, 2-5 parts of poly dimethyl diallyl ammonium chloride, 120-170 parts of water glass, 1-3 parts of a foaming agent and 0.5-2 parts of a foam stabilizer. The aluminum salt, the ferric chloride and the poly dimethyl diallyl ammonium chloride are combined to promote free fluorine to form flocculate, and the flocculate is quickly adsorbed through the activity characteristics of the calcined coal gangue and the alumina balls, so that the defluorination performance of the defluorination material is improved.

Description

technical field [0001] The invention relates to the technical field of fluorine removal, in particular to a novel fluorine removal material and a preparation process thereof. Background technique [0002] Fluoride is an indispensable raw material for the production of many chemical products. It is widely used in iron and steel smelting, coal chemical industry, electroplating and other industries. As a result, a large amount of fluoride is often produced during the production and processing of aluminum molds and chemical fertilizers. Fluoride wastewater. The national "Integrated Sewage Discharge Standard" stipulates that the concentration of fluoride ion is less than 10mg / L, the national "Petrochemical Industry Pollutant Discharge Standard" discharge limit is 20mg / L, and the maximum allowable concentration of fluorine in ground water is 1mg / L. Many places and factory direct discharge standards also stipulate that the fluoride ion concentration is less than 1mg / L. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F101/14
CPCC02F1/5236C02F1/56C02F1/281C02F2101/14
Inventor 蔡建国石洪雁朱天一
Owner 苏州博睿特环保科技有限公司
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