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Benefication method for bastnaesite

A beneficiation method, bastnaesite technology, applied in the direction of chemical instruments and methods, flotation, wet separation, etc., can solve the problems of high rare earth content in ore slime, large plant area, low total recovery rate, etc., to achieve The effect of high grade, low production cost and high recovery rate

Active Publication Date: 2012-06-20
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method also uses a shaking table as the roughing gravity separation equipment. The plant occupies a large area and is inconvenient to operate. Moreover, the rare earth content in the removed slime is high and the loss is large, resulting in a low total recovery rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Rare earth ore from a certain place in China is selected. The main mineral composition is bastnaesite, barite, fluorspar, orthoclase, quartz, nafertite, colemanite, biotite, kaolin and neonite. The raw ore REO grade is 2.89%. Raw ore is ground until the particle size is -1.0mm and then classified to obtain three particle sizes of -1.0+0.4mm, -0.4+0.074mm and -0.074mm, respectively using a high gradient magnetic separator under the background magnetic field strength of 1.0T After one separation, strong magnetic separation concentrate and strong magnetic separation tailings are obtained. The yield of strong magnetic separation coarse concentrate -1.0+0.4mm particle size is 6.91%, the rare earth REO grade is 4.73%, the recovery rate is 11.31%; the yield of -0.4+0.074mm particle size is 11.88%, the rare earth REO grade is 12.83%, the recovery The yield is 52.72%; the yield of -0.074mm particle size is 11.21%, the rare earth REO grade is 7.07%, and the recovery rate is 27.4...

Embodiment 2

[0028]The raw ore is the same as in Example 1, and the rare earth REO grade is 5.19%. Grinding, classification and magnetic separation are the same as in Example 1. Strong magnetic separation of coarse concentrate -1.0+0.4mm particle size yield 9.59%, rare earth REO grade 12.03%, recovery rate 22.23%; -0.4+0.074mm particle size yield 9.92%, rare earth REO grade 20.62%, recovery The yield is 39.43%; the yield of -0.074mm particle size is 11.29%, the rare earth REO grade is 14.26%, and the recovery rate is 31.03%. The total yield of rough concentrate by strong magnetic separation was 30.81%, 69.19% of tailings were removed by strong magnetic separation, and the total recovery rate of rare earth reached 92.69%. The coarse concentrate of each particle size strong magnetic separation is subjected to shaker gravity separation respectively to obtain shaker concentrate, shaker medium ore and shaker tailings. After merging the shaker concentrate and shaker medium ore of each particle...

Embodiment 3

[0030] The raw ore is the same as in Example 1, and the rare earth REO grade is 4.01%. Grinding, classification and magnetic separation are the same as in Example 1. Strong magnetic separation of coarse concentrate -1.0+0.4mm grain size yield 8.88%, rare earth REO grade 11.34%, recovery rate 25.11%; -0.4+0.074mm grain size yield 7.69%, rare earth REO grade 18.49%, recovery The yield is 35.45%; the yield of -0.074mm particle size is 9.34%, the rare earth REO grade is 13.26%, and the recovery rate is 30.87%. The total yield of rough concentrate by strong magnetic separation was 25.90%, 74.10% of tailings were removed by strong magnetic separation, and the total recovery rate of rare earth reached 91.43%. The coarse concentrate of each particle size strong magnetic separation is subjected to shaker gravity separation respectively to obtain shaker concentrate, shaker medium ore and shaker tailings. After merging the shaker concentrate and shaker medium ore of each particle size,...

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Abstract

The invention relates to a benefication method for bastnaesite. The benefication method for the bastnaesite is characterized by comprising the following steps: grinding and classifying the raw ore; performing magnetic separation to obtain magnetic concentrates and tailings; performing gravity separation on each grade of strong magnetic concentrate by using a table concentrator respectively to obtain table concentrates, table middlings and table tailings; combining each grade of table concentrate and table middling and performing high-gradient magnetic separation to obtain magnetic bastnaesite concentrates and magnetic middlings; combining the magnetic middlings and the table tailings; grinding the ores; performing closed-circuit flotation comprising one-time rough concentration, three-time scavenging and three-time concentration; and returning the middlings sequentially to obtain flotation bastnaesite concentrates and flotation tailings. The magnetic bastnaesite concentrates and the flotation bastnaesite concentrates are rare-earth total concentrates; the rare earth oxide (REO) grade of the rare earth is more than 65 percent; and the total recovery rate reaches 75 to 86 percent. According to the benefication method for the bastnaesite, fully-wet non-dust operation is adopted; separation efficiency is high; occupied area is small; production is performed continuously; flotation is performed at normal temperature; and environmental pollution is avoided. The benefication method for the bastnaesite is applicable to benefication of light rare earth minerals existing in the form of the bastnaesite.

Description

[0001] technical field [0002] The invention relates to an ore dressing method, in particular to a bastnaesite ore dressing method. Background technique [0003] Bastnaesite is one of the main light rare earth minerals. The Mountain Pass Rare Earth Mine in the United States, the Dubao Rare Earth Mine in Vietnam, the Beylikahl Rare Earth Mine in Turkey, the Maoniuping Rare Earth Mine in Sichuan, China, the Dechang Dalucao Rare Earth Mine in Sichuan, and the Weishan Rare Earth Mine in Shandong are all single Bastnaesite deposit, rare earth REO grade is 1~14%. At present, the main methods for processing and recovering bastnaesite include gravity separation, magnetic separation, flotation and their combined methods. [0004] Pradip and D.W.Fuerstenau (The Role of Inorganic and Organic Reagents in the Flotation Separation of Rare-Earth Ores, "International Journal of Mineral Processing," Vol.32, 1-22 (1991)) proposed a bastnaesite float The selection method, that is, the raw ...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03D1/00
Inventor 邱显扬胡真王成行李汉文汤玉和叶富兴汪泰钟森林陈志强邹坚坚叶小璐
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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