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Inorganic-organic hybridized flocculating material and preparation method of inorganic-organic hybridized flocculating material

A technology of organic hybridization and inorganic flocculants, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve environmental pollution, large power consumption, high content of inorganic components, etc. problems, achieve the effect of reducing cationic monomer components, reducing wastewater treatment costs, and improving charge neutralization

Active Publication Date: 2017-05-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are a series of problems in the tailings: (1) In order to effectively extract the valuable elements in the ore, the ore particles are ground very finely, that is, the d50 is below 30 μm, and the surface of the particles is negatively charged after adsorption and hydrolysis. Therefore, under the influence of factors such as low gravity and large electrostatic repulsion, it is difficult for suspended particles to settle rapidly in the suspension; (2) the residual amount of fine particles in the tailings supernatant obtained by natural settlement is relatively high, and direct reuse will be due to Severe mudification and other reasons affect the beneficiation effect, and the discharge will cause environmental pollution due to the residue of beneficiation agents; (3) The return rate of tailings is low, and low-density transportation will consume a lot of electricity
[0008] CN103011359A discloses a polyaluminum iron chloride dimethyl diallyl ammonium chloride homopolymer inorganic-organic composite flocculant, the flocculant is a simple composite of inorganic and organic components at normal temperature, no chemical bonds are produced, and The content of inorganic components is high, and when it is applied to tailings dehydration, the dosage is large and the cost is high; CN103351047A discloses an inorganic-organic hybrid flocculant, the inorganic part is polyaluminum chloride, and the organic part is polydimethyldiallyl Ammonium chloride, the two are linked by ionic bonds
The proportion of polyferric chloride in the hybrid flocculant is relatively high, and it is slightly insufficient in the adsorption and bridging of organic polymer chains. When it is used to treat tailings suspension with high solid content, the dosage of flocculant Higher, there are also problems such as large dosage and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of inorganic-organic hybrid flocculant includes the following steps:

[0047] (1) To aluminum hydroxide (Al(OH) 3 ) Add acrylamide (AM) and dimethyldiallylammonium chloride (DMDAAC) monomers to the colloid until it is completely dissolved, and place it in a constant temperature water bath device at a temperature of 40℃. After 30 minutes of high-purity nitrogen gas, slowly Drop ammonium persulfate ((NH 4 ) 2 S 2 O 8 ) And sodium bisulfite (NaHSO 3 ) Mixed initiator solution, the reaction system is sealed, the reaction is finished after 12h; where Al(OH) 3 The mass of organic monomer is 1:9, the mass ratio of DMDAAC to AM is 1:9, the mass of initiator is 0.1% of the mass of organic monomer, (NH4) 2 S 2 O 8 With NaHSO 3 The mass ratio is 1.5:1;

[0048] (2) Dissolve the gel obtained at the end of the reaction in water, and extract the gel solution obtained by dissolving in acetone to obtain a precipitate;

[0049] (3) The precipitate obtained by extraction is...

Embodiment 2

[0052] A preparation method of inorganic-organic hybrid flocculant includes the following steps:

[0053] (1) To iron hydroxide (Fe(OH) 3 ) Add acrylamide (AM) and dimethyldiallylammonium chloride (DMDAAC) monomers to the colloid until it is completely dissolved, and place it in a constant temperature water bath device at a temperature of 50℃. After passing high-purity nitrogen for 30 minutes, slowly Add potassium persulfate (K 2 S 2 O 8 )) and sodium bisulfite (NaHSO 3 ) Mixed initiator solution, the reaction system is closed, the reaction is finished after 6h; where Fe(OH) 3 The mass of organic monomer is 1:6, the mass ratio of DMDAAC to AM is 1:8, the mass of initiator is 0.02% of the mass of organic monomer, K 2 S 2 O 8 With NaHSO 3 The mass ratio is 2:1;

[0054] (2) Dissolve the gel obtained at the end of the reaction in water, and extract the gel solution obtained by dissolving in acetone to obtain a precipitate.

[0055] (3) Place the precipitate obtained by extraction in a d...

Embodiment 3

[0058] A preparation method of inorganic-organic hybrid flocculant includes the following steps:

[0059] (1) Add acrylamide (AM) and dimethyl diallyl ammonium chloride (DMDAAC) monomers to the polyaluminum chloride (PAC) solution until they are completely dissolved, and place them in a constant temperature water bath with a temperature of 50°C After 30 minutes of passing high-purity nitrogen, ammonium persulfate ((NH 4 ) 2 S 2 O 8 ) And sodium bisulfite (NaHSO 3 ), the reaction system is sealed, and the reaction is completed after 6 hours; the mass ratio of PAC and organic monomer is 1:6, the mass ratio of DMDAAC to AM is 1:9, and the initiator mass is 5 of the mass of organic monomer. %, (NH4) 2 S 2 O 8 With NaHSO 3 The mass ratio is 1.05:1

[0060] (2) Dissolve the gel obtained at the end of the reaction in water, and extract the gel solution obtained by dissolving in acetone to obtain a precipitate;

[0061] (3) The precipitate obtained by extraction is placed in a drying box to...

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Abstract

The invention provides an inorganic-organic hybridized flocculating agent and a preparation method of the inorganic-organic hybridized flocculating agent. The inorganic-organic hybridized flocculating agent is prepared from the raw material components: an initiator, and an inorganic flocculating agent and organic monomers at the mass ratio ranging from (1 to 9) to (1 to 6), wherein the organic monomers comprise dimethyl diallyl ammonium chloride and acrylamide at the mass ratio ranging from (1 to 9) to (1 to 5); the mass of the initiator is 0.02 percent to 5 percent of that of the organic monomers. The inorganic-organic hybridized flocculating agent is prepared through introducing the acrylamide and the dimethyl diallyl ammonium chloride into the inorganic flocculating agent and initiating two types of monomers to be subjected to in-situ copolymerization in an inorganic system. The inorganic-organic hybridized flocculating agent can be adaptive to sedimentation of electrified fine grained tailings through reasonably selecting raw materials and proportioning; the sedimentation speed of a tailing suspension solution can be remarkably improved under the condition that the adding amount is low, and the turbidity of supernatant is reduced; the treatment cost of wastewater is reduced and the quality of returned water is improved, and the aims of saving energy and reducing emission are realized.

Description

Technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to an inorganic-organic hybrid flocculation material and a preparation method thereof. Background technique [0002] In the beneficiation industry, after the ore is sorted, 10%-20% tailings suspension is generally produced. At present, the tailings have a series of problems: (1) In order to effectively extract the valuable elements in the ore, the ore particles are ground very fine, that is, d50 is below 30μm, and the surface of the particles is negatively charged after adsorption and hydrolysis. Therefore, suspended particles are difficult to settle quickly in the suspension under the influence of factors such as low gravity and high electrostatic repulsion; (2) The residual amount of fine particles in the tailings supernatant obtained by natural sedimentation is relatively high, and direct reuse will cause The serious silting phenomenon affects the beneficiation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52C08F220/56C08F226/02C08F2/44
CPCC02F1/5236C02F1/56C08F2/44C08F220/56C08F226/02
Inventor 叶树峰刘娅钱鹏吕翠翠丁剑陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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