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Mineral separation method for alkaline rock type rare earth mineral

A mineral processing method and rare earth technology, applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of low total recovery rate, large floor area, inconvenient operation, etc., and achieve high recovery rate and low production cost , the effect of convenient management

Active Publication Date: 2013-04-10
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 occupies a large area of ​​equipment, is inconvenient to operate, and has a low total recovery rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Select a rare earth mine in China, the main mineral composition is bastnaesite, fluorspar, barite, orthoclase, quartz, nafertite, manganite, biotite, kaolin, neonite, hematite and limonite etc. The raw ore REO grade is 2.87%. The raw ore was ground to -1.0mm, and the background magnetic field strength was 1.0T, and the high-gradient wet magnetic separation roughing was used to obtain 23.74% magnetic roughing concentrate and 76.26% magnetic roughing tailings. Under the condition that the background magnetic field strength is 1.0T, the magnetic separation roughing tailings are swept by high-gradient wet magnetic separation, and 6.43% magnetic separation concentrate and 69.83% magnetic separation tailings are obtained.

[0024] Combining magnetic separation roughing concentrate and sweeping magnetic separation concentrate, grinding to -0.043mm accounts for 71.50%, according to each ton of raw ore, add 1000 grams of regulator water glass to adjust slurry, 4000 grams of col...

Embodiment 2

[0026] The raw ore is the same as in Example 1, and the rare earth REO grade is 1.88%. Grinding and magnetic separation are the same as in Example 1, the magnetic separation rougher concentrate yield rate is 22.30%, the magnetic separation rougher tailings yield rate is 77.70%, the magnetic separation scavenging concentrate yield rate is 3.77%, and the magnetic separation sweep tailings yield rate is 3.77%. It was 73.93%. Combining magnetic separation roughing concentrate and magnetic separation sweeping concentrate, grinding to -0.043mm accounts for 75%. The regulator used in the roughing, sweeping and fine selection of flotation operations is sodium carbonate at a weight ratio of 1:1: water glass, and the collector is benzohydroxamic acid at a weight ratio of 4:4:1: salicylic hydroxamic acid :C 5-9hydroxamic acid. The pulp concentration is 30%. Calculated per ton of raw ore, add 2000 grams of adjuster to adjust the slurry, 5000 grams of collector and 20 grams of foaming a...

Embodiment 3

[0029] The raw ore is the same as in Example 1, and the rare earth REO grade is 4.56%. Grinding and magnetic separation are the same as in Example 1, the magnetic separation roughing concentrate production rate is 26.23%, the magnetic separation roughing tailings production rate is 73.77%, the magnetic separation scavenging concentrate production rate is 4.69%, and the magnetic separation scavenging tailings production rate is 4.69%. It was 69.08%. Combining magnetic separation roughing concentrate and magnetic separation sweeping concentrate, grinding to -0.043mm accounts for 68%. The adjustment agent used in the roughing, sweeping and fine selection of flotation operations is water glass: aluminum sulfate: sodium hexametaphosphate with a weight ratio of 5:5:1, and the collector is benzohydroxime with a weight ratio of 1:1 Acid: Ammonium Salicylhydroxamate. The pulp concentration is 32%. According to each ton of raw ore, 1500 grams of regulators are added to adjust the slur...

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Abstract

The invention relates to a mineral separation method for an alkaline rock type rare earth mineral, which is characterized in that the mineral separation method comprises the following steps of: carrying out mineral grinding and magnetic separation to obtain magnetic separation roughing concentrates and magnetic separation roughing tailings; carrying out magnetic separation scavenging on the magnetic separation roughing tailings by using a high-gradient wet process to obtain magnetic separation scavenging concentrates and magnetic separation scavenging tailings; and combining the magnetic separation roughing concentrates with the magnetic separation scavenging concentrates, carrying out closed-route flotation of rough concentration for one time, scavenging for three times and fine concentration for three times after mineral grinding and sequentially returning middlings. Finally, flotation fluorine carbon cerium concentrates and flotation tailings are obtained. The mineral separation method has the advantages of simple and short process, small equipment floor area, no dust operation, normal temperature operation and high sorting index. The mineral separation method is suitable for the mineral separation of a light rare earth mineral existing in a bastnaesite form.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a beneficiation method of bastnaesite, an alkaline rock type rare earth mineral. Background technique [0002] According to relevant data reports in 2010, China's industrial reserves of rare earth resources are 36 million tons, accounting for 25.33% of the world's rare earth resources, and the REO grade of rare earths is 1~14%. my country's rare earth resources are not only rich, but also of many types, including Baiyun Obo mixed rare earth ore, Sichuan alkaline rock type bastnaesite rare earth ore, and southern weathering and elution type rare earth ore. solid foundation. At present, the main methods for processing and recovering alkaline rock-type rare earth ore-bastnaesite include gravity separation, magnetic separation and flotation, and the combined method of the three methods. [0003] Chinese Patent Publication No. CN1403203 discloses a bastnaesite beneficiation method: the raw o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/00B03D1/08
Inventor 邱显扬胡真王成行汤玉和李汉文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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