Andalusite raw ore purification method

A purification method, andalusite technology, applied in the direction of improving process efficiency, etc., can solve the problems of unfriendly environment, toxic and harmful flotation reagents, and low-grade andalusite raw ore, and achieve high recovery rate, improved purity, and simple operation Effect

Active Publication Date: 2021-09-03
中国冶金地质总局昆明地质勘查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the grade of andalusite raw ore is generally not high. The content of aluminum oxide in the ore is up to 55%, the content of iron oxide is generally greater than 1%, and the recovery rate is lower than 80%. The flotation process will bring in flotation reagents to change the performance of andalusite products, and most of the flotation The reagents are poisonous and harmful, and are not friendly to the environment; on the other hand, in the process of analyzing and testing the andalusite, there will always be a difficult problem of solving the problem of dissolving experience coefficient correction due to the inability to obtain the andalusite single crystal in the mining area. While grade provides another way, it also provides a shortcut for andalusite content analysis and testing to find single crystals (especially in some mining areas where single crystals cannot be selected)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Grind andalusite raw ore samples (the content of aluminum oxide is 15.64%, and the content of ferric oxide is 2.7%), and pass through a 100-mesh standard sieve; weigh 5.00g of ground andalusite raw ore samples, and store them at 300°C Roast for 2 hours; then soak in 20ml of nitric acid containing ammonium bifluoride at a concentration of 10g / L for 12 hours and then filter; wash with 5% hydrochloric acid and pure water for 5 times (5ml each time) and dry, weighing 1.10 g.

[0020] After testing, the content of aluminum oxide in the treated andalusite sample is 60.33%, and the content of iron oxide is 0.13%. Without considering the dissolution coefficient, the purity of the processed andalusite is 95.88% (the content of iron oxide is 95.88%. The conversion factor of converting aluminum to andalusite is 1.5893), and the recovery rate of andalusite in this embodiment is as high as 84.9%.

Embodiment 2

[0022] Grind the andalusite raw ore sample (the content of aluminum oxide is 21.32%, and the content of ferric oxide is 3.53%), and pass through a 200-mesh standard sieve; weigh 5.00g of the ground andalusite raw ore sample, and place it at 500°C Roast for 1 hour; then soak in 20ml of hydrofluoric acid, hydrochloric acid and nitric acid with a volume ratio of 1:1:1 and filter for 16 hours; wash with 5% hydrochloric acid and pure water for 5 times (each time 5ml) and dry , weighing 1.48g.

[0023] After testing, the content of aluminum oxide in the processed andalusite sample was 61.88%, and the content of ferric oxide was 0.23%. Without considering the dissolution coefficient, the purity of the processed andalusite was 98.35% (three The conversion factor of aluminum oxide to andalusite is 1.5893), and the recovery rate of andalusite in this embodiment is as high as 85.7%.

Embodiment 3

[0025] Grind the andalusite raw ore sample (the content of aluminum oxide is 52.88%, and the content of ferric oxide is 1.53%), pass through a 200-mesh standard sieve; weigh 5.00g of the ground andalusite raw ore sample; then use hydrofluoride Soak in 20ml of acid, hydrochloric acid and nitric acid with a volume ratio of 2:1:1 and filter for 14 hours; wash with 5% hydrochloric acid and pure water for 5 times (each time 5ml) and dry, weighing 3.83g.

[0026] After testing, the content of aluminum oxide in the treated andalusite sample was 60.33%, and the content of iron oxide was 0.43%. Without considering the dissolution coefficient, the purity of the treated andalusite was 95.88% ( The conversion factor of aluminum to andalusite is 1.5893), and the recovery rate of andalusite in this embodiment is 87.4%.

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Abstract

The invention relates to an andalusite raw ore purification method, and belongs to the technical field of andalusite ore beneficiation. The purification method specifically comprises the following steps: grinding andalusite raw ore until the particle size is below 100 meshes; roasting the andalusite raw ore obtained in the previous step; carrying out mixed acid soaking treatment on the roasted andalusite raw ore; and filtering and separating the raw andalusite ore soaked in the mixed acid, sequentially washing the raw andalusite ore with 5% hydrochloric acid and pure water for 5 times, and drying to obtain the high-purity andalusite. According to the method, the method of grinding, roasting and acid leaching treatment is adopted, the andalusite raw ore can be purified to 95% or above, the content of ferric oxide is lower than 1%, and the method is easy to operate and high in recovery rate.

Description

technical field [0001] The invention belongs to the technical field of andalusite ore beneficiation, in particular to a method for purifying andalusite raw ore. Background technique [0002] Andalusite has high refractoriness (the refractoriness can reach above 1800 ℃), and it is resistant to sudden cooling and sudden heat, high mechanical strength, strong thermal shock resistance, strong slag resistance, high load conversion point, and extremely high chemical stability. (even insoluble in hydrofluoric acid) and extremely strong chemical resistance. It is mainly used in high-grade refractory materials in the smelting industry, raw materials in the technical ceramics industry, smelting high-strength light-weight silicon-aluminum alloys, and making metal fibers. Bright colors can also be used to make handicrafts and decorations. [0003] At present, the grade of andalusite raw ore is generally not high. The content of aluminum oxide in the ore is up to 55%, the content of ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/06C22B3/10C22B1/00
CPCC22B1/02C22B3/06C22B3/065C22B3/10C22B1/00Y02P10/20
Inventor 罗大芳叶元顺陈军车晓艳邓碧霞赵志欣范本奕
Owner 中国冶金地质总局昆明地质勘查院
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