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Mixed flora and application thereof in iron removal and whitening for kaolin

A technology of mixing flora and kaolin

Inactive Publication Date: 2018-01-19
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially iron oxide minerals with a particle size of less than 10 µm, because of their small particle size and complex occurrence forms, it is difficult to purify kaolin
[0003] Traditional methods to improve the whiteness of kaolin include physical methods (including hand selection, water separation, magnetic separation, flotation, etc.) and chemical methods (including oxidation, reduction, redox, etc.), however, these methods There are generally disadvantages such as large energy consumption, high operating costs and environmental pollution in the treatment process, especially the use of expensive chemicals for iron removal and whitening of kaolin, which has higher operating costs and raw material costs, and causes more serious environmental pollution

Method used

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  • Mixed flora and application thereof in iron removal and whitening for kaolin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. Preparation of mixed flora bacterial solution:

[0057] Iron-reducing bacteria RBFL, iron-reducing bacteria RBFL3 and iron-reducing bacteria FeRB-FL1404 were respectively activated and expanded to obtain corresponding bacterial liquids, and the concentration of viable bacteria in each bacterial liquid was 10 7 CFU / ml-10 9 CFU / ml;

[0058] 2. Prepare the above-mentioned bacteria solution according to the volume ratio of iron-reducing bacteria RBFL, iron-reducing bacteria RBFL and iron-reducing bacteria FeRB-FL1404 at a ratio of 1:2:1.6 to prepare a mixed bacterial solution;

[0059] 3. Kaolin is sieved to a particle size of 200-400 mesh, and water is added to prepare kaolin slurry A with a mass fraction of 10%;

[0060] 4. Add 1.2% molasses of pulp A quality, 1.2% peptone of pulp A quality, 0.006% pulp A quality Tween 80 and 0.008% pulp A quality MgSO to the above pulp A 4， Prepared into pulp B;

[0061] 5. Add the bacterial solution prepared in step (2) to the ...

Embodiment 2

[0066] 1. Preparation of mixed flora bacterial solution:

[0067] Iron-reducing bacteria RBFL, iron-reducing bacteria FeRB-FL1404 and Geobacter bremensis Straub and Buchholz-Cleven (ATCC BAA-607) were respectively activated and expanded to obtain corresponding bacterial liquids, and the concentration of viable bacteria in each bacterial liquid was 10 7 CFU / ml-10 9 CFU / ml;

[0068] 2. Prepare the above-mentioned bacterial liquid according to the volume ratio of iron-reducing bacteria RBFL, iron-reducing bacteria FeRB-FL1404 and Geobacter bremensis Straub and Buchholz-Cleven (ATCC BAA-607) at a ratio of 3:6:2 to prepare a mixed bacterial liquid ;

[0069] 3. The rest of the operating steps (steps 3-8) are the same as in Example 1.

Embodiment 3

[0071] 1. Preparation of mixed flora bacterial solution:

[0072] Iron-reducing bacteria FeRB-FL1404, iron-reducing bacteria FL-H1 and Achromobacter (CCTCC AB 206571) were respectively activated and expanded to obtain corresponding bacterial liquids, and the concentration of viable bacteria in each bacterial liquid was 10 7 CFU / ml-10 9 CFU / ml;

[0073] 2. Prepare the above-mentioned bacterial solution according to the volume ratio of iron-reducing bacteria FeRB-FL1404, iron-reducing bacteria FL-H1 and Achromobacter (CCTCC AB206571) at a volume ratio of 5:8:2 to prepare mixed bacteria liquid;

[0074] 3. The rest of the operating steps (steps 3-8) are the same as in Example 1.

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Abstract

The invention discloses mixed flora and application thereof in iron removal and whitening for kaolin. The mixed flora is prepared from the following components: iron-reducing bacteria RBFL, iron-reducing bacteria FeRB-FL1404, iron-reducing bacteria FL-HI, thermoanaerobacter ethanolicus, achromobacter, Geobacter bremensis Straub and Buchholz-Cleven; due to a synergistic effect of microbial strainsin the mixed flora, the iron-removing effect of the microbes for the kaolin can be improved. The bacterial liquid obtained by culturing the mixed flora is used for reducing Fe2O3 in the kaolin, and insoluble Fe2O3 is reduced into water-soluble Fe<2+> which can be removed by solid-liquid separation, so that the content of Fe2O3 in the kaolin can be reduced and the whiteness of the kaolin can be improved. The mixed flora has the advantages that the cost is low, the environmental-friendly effect is achieved, the kaolin ore with original low mining value and low grade can be mined, the service life of the mine can be prolonged, and the high quality of the low-grade kaolin can be realized.

Description

technical field [0001] The invention belongs to the technical field of kaolin processing, in particular to a mixed flora for reducing kaolin Fe 2 0 3 , so that the insoluble Fe in kaolin 2 0 3 into soluble Fe 2+ , to reduce Fe in kaolin 2 0 3 content, thereby increasing the whiteness of kaolin and enhancing the commercial value of kaolin. Background technique [0002] Kaolin is a non-metallic mineral material with excellent technological performance and important application value. It is widely used in industrial production fields such as ceramics, papermaking, building materials, and chemicals. my country is rich in kaolin resources, with proven reserves of about 3 billion tons, ranking third in the world. Kaolin is also one of the dominant minerals in Fujian, accounting for about 10% of the country's kaolin reserves, of which more than 80% is high-iron kaolin, which is of low grade and difficult to utilize. Whiteness is one of the important indicators that determi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C01G49/04C01B33/40C12R1/07C12R1/025C12R1/01
Inventor 林玉满
Owner FUJIAN NORMAL UNIV
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