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Method for deironing, purifying and sorting kaolin

A technology of kaolin and kaolin mines, applied in chemical instruments and methods, sorting, solid separation, etc., can solve the problems of high sorting cost and difficult industrialization, achieve obvious economic and social benefits, reduce production costs, eliminate Simple effect of iron purification and separation process

Pending Publication Date: 2022-08-05
YUNNAN PHOSPHATE CHEM GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple kaolin iron removal, purification and separation method to solve the problem that after adding water in the existing kaolin ore processing process, the obtained product needs to be dehydrated, resulting in high separation costs and difficult industrialization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The experiment was carried out with a kaolin ore in a certain place in Hunan, and its raw ore Al 2 O 3 The content is 35.40%, Fe 2 O 3 The content is 1.08%, the raw ore is crushed and screened, and then sent to the vibrating screen for classification, and the qualified grade products (particle size 10-80mm, water content 5-15%) enter the photoelectric separator for sorting, and obtain qualified concentrates . The indicators in the test are shown in Table 1.

[0018] Table 1

[0019] name Al 2 O 3

[0020] As can be seen from Table 1, after the kaolin is separated by iron removal, the main impurity Fe 2 O 3 Reduced from 1.08% to below 0.80% Al in concentrate products 2 O 3 It has been improved, the rate of concentrate is high, the goal of obtaining concentrate in one separation is achieved, and the separation process is greatly simplified.

Embodiment 2

[0022] The experiment was carried out with a coal measure kaolin ore in a certain place in Yunnan, and its raw ore Al 2 O 3 The content is 21.44%, Fe 2 O 3 The content is 5.75%. The raw ore is crushed and screened, and then sent to the vibrating screen for classification. The qualified grade products (particle size 10-40mm, water content 10-18%) enter the photoelectric sorting machine for sorting. Realize direct tail throwing. The indicators in the experiment are shown in Table 2.

[0023] Table 2

[0024] name Al 2 O 3

[0025] It can be seen from Table 2 that after the kaolinite is removed by photoelectric separation, the Al 2 O 3 From 21.44% to 24.49%, Fe 2 O 3 content decreased from 5.75% to 3.63%, Al in tailings 2 O 3 The content is less than 20%, which achieves the goal of directly throwing tails in one-time dry sorting.

Embodiment 3

[0027] The iron removal test was carried out with kaolin from another place in Yunnan, and its raw ore Al 2 O 3 The content is 27.47%, Fe 2 O 3 The content is 4.11%. Similarly, the raw ore is crushed and screened and then classified to obtain qualified grade products (particle size 12-50mm) and enter into the photoelectric sorting machine for primary sorting. The indicators of each item in the experiment are shown in Table 3.

[0028] table 3

[0029] name Al 2 O 3

Fe 2 O 3

SiO 2

CaO raw ore 27.47 4.11 30.75 1.15 concentrate 36.33 2.67 34.52 1.01 tailings 24.52 4.60 29.40 1.19

[0030] It can be seen from Table 3 that after the kaolin ore has undergone photoelectric separation to remove iron, the Al in the material 2 O 3 From 27.47% to 36.33%, Fe 2 O 3 The content is reduced from 4.11% to 2.67%, and the sorting effect is obvious.

[0031] It can be seen from the results of Examples 1, 2 and 3: this proces...

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Abstract

The invention discloses an iron removal, purification and separation method for kaolin, and relates to the technical field of nonmetallic mineral separation. After kaolin ore is preliminarily crushed and separated, ore grains with proper grain size are selected and enter photoelectric separation equipment, the photoelectric separation equipment separates the ore grains according to a preset selection curve, the ore grains meeting the concentrate requirement are purged to a concentrate product box, and tailings enter a tailings box. The content of Fe2O3 in kaolin ore is obviously reduced and the content of Al2O3 is improved through simple photoelectric separation treatment under the dry condition, concentrate meeting the follow-up processing quality is obtained, the iron removal, purification and separation process is simple, the production cost is greatly reduced, low-grade kaolin is recycled after separation, the resource utilization rate is increased, and the method is suitable for industrial production. The method has obvious economic benefits and social benefits.

Description

technical field [0001] The invention relates to the technical field of non-metallic mineral sorting, in particular to a method for purifying and sorting kaolin for iron removal. Background technique [0002] Kaolin is a non-metallic mineral, a kind of clay and clay rock dominated by kaolinite clay minerals, mainly used in papermaking, ceramics and refractory materials, followed by coatings, rubber fillers, enamel glazes and white cement Raw materials, a small amount is used in plastics, paints, pigments, grinding wheels, pencils, daily cosmetics, soaps, pesticides, pharmaceuticals, textiles, petroleum, chemicals, building materials, national defense and other industrial sectors. From the analysis of market demand, papermaking, ceramics, and refractory materials are the three main downstream demand industries for kaolin rock. Among them, ordinary processed kaolin rock is used for refractory production, while high-end kaolin rock is mainly used in biomedicine, advanced coating...

Claims

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Application Information

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IPC IPC(8): B07C5/36B07C5/02B07B1/28
CPCB07C5/363B07C5/02B07B1/28Y02W30/52
Inventor 罗昆义张朝旺李若兰刘润哲刘丽芬戴川彭丽群彭桦庞建涛肖喆杨建光杜迅许邵彬刘海深罗大芳杜磊
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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