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Method for removing quartz from kaolin

A technology of kaolin and quartz, which is applied in the field of non-metallic ore kaolin quality improvement and processing, to achieve the effect of good flocculation performance, favorable removal, and extensive cultivation conditions

Inactive Publication Date: 2016-08-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a method for removing quartz from kaolin to solve the problems of separating fine-grained quartz from kaolin and purifying kaolin

Method used

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  • Method for removing quartz from kaolin

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Effect test

Embodiment 1

[0019] Embodiment 1: the method for removing quartz in artificial mixed kaolin ore:

[0020] Artificial mixed ore is composed of 90% kaolinite and 10% quartz, Al 2 o 3 and SiO 2 The mass content of Al in kaolinite is 35.28% and 50.67%; 2 o 3 and SiO 2 The mass contents of the crystals are 39.2% and 45.3% respectively; the purity of quartz is 99%.

[0021] The specific steps for removing quartz from kaolin are as follows:

[0022] (1) Grinding kaolin artificial mixed ore until the particle size is below 0.045mm;

[0023] (2) To prepare selective flocculation separation liquid, first press 5.0 g / L sucrose, Na 2 HPO 4 2.0 g / L, MgSO 4 •7H 2 O 1.0g / L, FeCl 3 0.005 g / L, CaCl 2 0.1 g / L, AlCl 3 0.5 g / L, NaSiO 3 •9H 2 O 1.1 g / L prepared microbial growth liquid medium, adjusted the pH value of the medium to 7.3, inoculated the strains of Azotobacter rufica into the Erlenmeyer flask filled with liquid medium, and cultured it in a water bath at 30°C for 96 hours with sh...

Embodiment 2

[0027] Embodiment 2: The method for removing quartz in the kaolin ore sample:

[0028] After graded sand removal, containing Al 2 o 3 and SiO 2 There are fine-grained quartz impurities in the kaolin samples which are respectively 35.28% and 46.50% (mass percentage).

[0029] The specific steps for removing quartz from kaolin are as follows:

[0030] (1) Grinding the kaolin ore sample until the particle size is below 0.045mm;

[0031] (2) To prepare selective flocculation separation liquid, first press 3.0 g / L sucrose, Na 2 HPO 4 1.0 g / L, MgSO 4 •7H 2 O 0.5g / L, FeCl 3 0.005 g / L, CaCl 2 0.2 g / L, AlCl 3 0.75 g / L, NaSiO 3 •9H 2 O 2.0 g / L prepared microbial growth liquid medium, adjusted the pH value of the medium to 7.0, inoculated the strains of Azotobacter rufica into an Erlenmeyer flask filled with liquid medium, and cultured it in a water bath at 28°C for 72 h with shaking, and shaken The rotation speed was 200 r / min to obtain the culture solution of Azotobact...

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Abstract

The invention discloses a method for removing quartz from kaolin. The method for removing the quarts from the kaolin belongs to the technical field of non-metallic mine kaolin upgrading, and comprises the steps of firstly finely grinding the kaolin ore by using an ore mill to enable the particle size of the finely ground kaolin core to be 0.045 mm or below; then blending the finely ground kaolin ore and microorganism selective flocculation separation liquid to prepare an ore pulp and adjusting a pH value of the ore pulp; and standing after stirring for a while, enabling kaolin particles to be precipitated and quartz particles to be suspended in the selective flocculation separation liquid, and separating precipitates from the selective flocculation separation liquid so as to realize the separation of the kaolin from the quartz. The selective flocculation separation liquid provided by the invention has both functions of flocculating the kaolin and dispersing the quartz, so that the micro-fine quartz can be effectively removed from the kaolin ore, and the technological process is simple.

Description

technical field [0001] The invention relates to a method for removing quartz from kaolin, which belongs to the technical field of non-metallic ore kaolin upgrading and processing. Background technique [0002] Kaolin is an important raw material for ceramic products. As a big country of ceramics, my country has unique kaolin resources, but there is a shortage of high-quality kaolin resources for making advanced ceramics. The trend of high-quality low-quality kaolin through beneficiation and deep processing is also becoming more and more obvious. With the development of the economy and the advancement of science and technology, kaolin has been continuously used in high-tech fields, and its importance has become increasingly prominent. Quartz impurities in kaolin affect its performance. For coarse-grained quartz, spiral classifiers, hydrocyclones and vibrating screens are usually used for classification and removal. However, the removal effect of fine-grained quartz by clas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D3/06B03D103/02
CPCB03D1/018B03D3/06B03D2201/002B03D2203/02
Inventor 杨志超张素红刘生玉郭建英
Owner TAIYUAN UNIV OF TECH
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