Preparation method and application of inorganic flocculant with vermiculite mineral as raw material

An inorganic flocculant and flocculant technology, applied in the field of water pollution treatment, can solve the problems of high human and biological hazard, inability to reuse the treatment process, increased water treatment costs, etc., and achieve low prices, easy availability, and treatment costs. low effect

Active Publication Date: 2016-10-26
TIANJIN UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

Inorganic flocculants commonly used in industry are artificially synthesized polyiron and polyaluminum flocculants. There are many defects in the use of such flocculants: 1. The metal ion content in flocculants is high, and usually exists in a polymerized state. The metal iron ions and aluminum ions in the polymerized state are toxic and extremely harmful to the human body and biology. Therefore, this artificially synthesized polyiron and polyaluminum inorganic flocculant cannot be used in the recycling process of aquaculture and landscape.
2. Due to the toxicity of the flocculant, it will also produce secondary pollution, which will cause harm to the environment and human body
3. The artificially synthesized polyiron and polyaluminum inorganic flocculants are more expensive, resulting in an increase in water treatment costs

Method used

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  • Preparation method and application of inorganic flocculant with vermiculite mineral as raw material
  • Preparation method and application of inorganic flocculant with vermiculite mineral as raw material
  • Preparation method and application of inorganic flocculant with vermiculite mineral as raw material

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preparation example Construction

[0040] A kind of preparation method of the inorganic flocculant taking vermiculite mineral as raw material, comprises the following steps:

[0041] ⑴. Vermiculite is a layered structure of magnesium-containing hydroaluminosilicate secondary metamorphic minerals. It is natural, non-toxic and rich in minerals. After crushing, the specific surface area of ​​vermiculite will increase, and the effective flocculation components such as silicon, iron, and aluminum can be released better after modification, so the raw materials should be crushed, and vermiculite with high metal iron and aluminum content should be selected. Stone, wherein the mass fraction of metal iron element is: 12-14%, the mass fraction of metal aluminum element is: 25-29%, and the vermiculite raw material is pulverized for 1-4min, so that the average particle size is 129.5-213.5μm;

[0042] (2) Mix the crushed vermiculite with an acid solution, the acid solution is sulfuric acid, hydrochloric acid or oxalic acid, ...

Embodiment 1

[0046] A kind of preparation method of the inorganic flocculant taking vermiculite mineral as raw material, comprises the following steps:

[0047] ⑴. Select vermiculite with high content of metallic iron and aluminum, wherein the mass fraction of metallic iron is 12%, and the mass fraction of metallic aluminum is 25%. Grind the vermiculite raw material for 1 min to make the average particle size 213.5 μm;

[0048] ⑵. Mix the crushed vermiculite with 10% hydrochloric acid solution, the mass ratio of vermiculite to hydrochloric acid solution is 0.7:1, stir the mixture vigorously until it becomes a paste, and heat it in a water bath at 25°C for 8 hours. Viscous slurry flocculant can be obtained.

Embodiment 2

[0050] A kind of preparation method of the inorganic flocculant taking vermiculite mineral as raw material, comprises the following steps:

[0051] ⑴. Select vermiculite with high content of metallic iron and aluminum elements, wherein the mass fraction of metallic iron is 13.6%, and the mass fraction of metallic aluminum is 27.1%. Grind the vermiculite raw material for 3 minutes to make its particle size 139.1 μm;

[0052] ⑵. Mix the crushed vermiculite with 40% sulfuric acid solution, the mass ratio of vermiculite to sulfuric acid solution is 1:1, stir the mixture vigorously until it becomes a paste, and heat it in a water bath at 75°C for 2 hours, that is Viscous slurry flocculant can be obtained;

[0053] ⑶. Add a certain quality of distilled water to the viscous slurry colloidal flocculant prepared in step ⑵. The mass ratio of colloidal flocculant to water is 1:5, then mix and filter to obtain a liquid flocculant.

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Abstract

The present invention relates to a preparation method of an inorganic flocculant adopting a vermiculite mineral as a raw material. The preparation method comprises: (1) selecting vermiculite with high metal iron content and high aluminum content, and crushing the vermiculite raw material, (2) mixing the crushed vermiculite and an acid solution, vigorously stirring to obtain the paste state, and carrying out water bath heating for 1-8 h at a temperature of 25-90 DEG C to obtain the gelatinous slurry-like flocculant. According to the present invention, the preparation method of the present invention is the economical, efficient and safe water treatment flocculant preparation method; the inorganic mineral material flocculant prepared by using the method presents the gelatinous slurry, the particle surface is the concave-convex uneven porous structure, and the phase of the elements inside the mineral matter of the inorganic flocculant is significantly changed compared with the phase of the elements inside the mineral matter with no acid modification so as to provide the good condition for the production of the flocculation effect; and the inorganic flocculant has advantages of good dispersion, wide operability range, strong adaptability, good water treatment effect, safe use, no pollution and the like.

Description

technical field [0001] The invention relates to the technical field of water pollution treatment, in particular to a preparation method and application of an inorganic flocculant using vermiculite minerals as raw materials. Background technique [0002] At present, the problem of water pollution in the world is becoming more and more serious, and the demand for the application of water treatment technology is also increasing. Among them, the flocculation-sedimentation method is a relatively widely used method in water treatment applications, which has the advantages of cost-effective, simple process, and convenient operation. This method is widely used in seawater desalination, drinking water preparation, aquaculture wastewater treatment, fermentation wastewater treatment, food processing, etc. Therefore, research and development of economical, efficient and safe water treatment flocculants has always been one of the important research directions of researchers at home and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236C02F2103/20
Inventor 王昶林鹏张稹
Owner TIANJIN UNIV OF SCI & TECH
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