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Method for utilizing two-stage continuous operation hot-alkali decomposition technology for processing rare earth ore concentrate

A technology of rare earth concentrate and hot alkali, which is applied in hot alkali decomposition treatment of rare earth concentrate, the treatment of rare earth concentrate, and the field of improving the decomposition of rare earth concentrate, which can solve the problems of shortening processing time, lowering processing temperature, and low operating safety , to achieve the effect of reducing process cost, improving efficiency, and dust

Active Publication Date: 2019-05-10
湖南欧华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to propose a new decomposition treatment method for rare earth concentrates in view of the problems of high temperature requirements, long holding time, low operation safety, and high energy consumption in the existing decomposition treatment methods of rare earth concentrates. , using the decomposition treatment method of rare earth concentrate can effectively reduce the treatment temperature, shorten the treatment time, and decompose rare earth concentrate more economically, efficiently and environmentally friendly

Method used

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  • Method for utilizing two-stage continuous operation hot-alkali decomposition technology for processing rare earth ore concentrate

Examples

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Comparison scheme
Effect test

example 1

[0034] In domestic professional equipment, -80 mesh mixed rare earth concentrate (content REO37%) is calculated according to the weight ratio of mixed rare earth concentrate:, alkali = 1:1.2, and 45% lye is prepared in professional equipment. Take lye: mixed rare earth concentrate = 2:1 ratio; transport the lye to professional equipment for high-speed stirring, and slowly add mixed rare earth concentrate to the professional equipment, and heat the slurry through an external heating device To 80-120 ℃, pumped into the grinding and soaking machine while grinding and soaking, the speed of the milling and soaking machine is 2000r / min, the medium of the milling and soaking machine is zirconia, and the slurry enters the milling and soaking machine from one end of the milling and soaking machine; the slurry after grinding and soaking It is directly transported from the outlet of the grinding and soaking machine to the stirring reaction tank, and the temperature is raised to 120-130 ° ...

example 2

[0036] In the domestic professional equipment, the -100 mesh monazite concentrate (content REO51%) is calculated according to the weight ratio of monazite:alkali=1:1.4, and 55% lye is prepared in the professional equipment. Take lye: monazite = 2.5:1 and weigh it; transport the lye to professional equipment for high-speed stirring, then slowly add monazite into the professional equipment, and heat the slurry to 70-130°C through an external heating device. Pump into the grinding and soaking machine for grinding and dipping. The speed of the milling and soaking machine is 2200r / min. The medium of the milling and soaking machine is zirconia. The slurry enters the milling and soaking machine from one end of the milling and soaking machine; The outlet is transported to the stirring reaction tank, and the temperature is raised to 130-140 ° C; after the heat preservation and stirring reaction is completed for 4 hours, the alkali cake is obtained by washing and filtering. Subsequent h...

example 3

[0038] In domestic professional equipment, -60 mesh bastnaesite concentrate (content REO45%) is calculated according to the weight ratio of bastnaesite concentrate: alkali = 1:1.3, and 50% lye is prepared in professional equipment. Take lye: mixed rare earth concentrate = 2.3:1 ratio weight; transport lye to professional equipment for high-speed stirring, bastnaesite concentrate is slowly added to the lye in the professional equipment, through the external heating device Heat the slurry to 90-110°C, pump it into the milling and soaking machine while grinding and soaking, the speed of the milling and soaking machine is 2100r / min, the medium of the milling and soaking machine is alumina, and the slurry enters the milling and soaking machine from one end of the milling and soaking machine; The final slurry is directly transported from the outlet of the grinding and soaking machine to the stirring reaction tank, and the temperature is raised to 130-140°C; after 4 hours of heat pres...

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Abstract

The invention discloses a method for utilizing two-stage continuous operation hot-alkali decomposition technology for processing rare earth ore concentrate. The two-stage operation manner with grinding leaching and agitation leaching is adopted for rare earth ore concentrate materials. Firstly, wet process grinding leaching is carried out on rare earth ore concentrate materials in a grinding leaching machine, then, the materials subjected to wet process grinding leaching is input into a rare earth ore concentrate hot alkali decomposition tank to be subjected to hot alkali decomposition agitation leaching, and ultrafine rare earth ore concentrate decomposition materials are prepared in the two-stage manner with wet process grinding leaching and hot alkali decomposition agitation leaching. According to the method for utilizing two-stage continuous operation hot-alkali decomposition technology for processing rare earth ore concentrate, the two-stage operation manner including grinding leaching and agitation leaching is adopted, the technology of carrying out grinding and leaching at the same time is achieved, the direct recovery rate of rare earth metals in the rare earth ore concentrate is increased, the alkali decomposition period is shortened, the process cost is reduced, the energy consumption and time are saved, the operating environment is greatly improved, the production efficiency is improved, and therefore, the method becomes a rare earth ore concentrate treatment method which is high in adaptability, clean, efficient, quick and capable of achieving continuous operation, and achieves the effect of treating rare earth ore concentrate in a reasonable, economical, environment-friendly and energy-saving manner.

Description

technical field [0001] The invention relates to a processing method for rare earth concentrates, in particular to a method for treating rare earth concentrates by thermo-alkali decomposition, which is mainly used for improving the method for decomposing rare earth concentrates, and belongs to the technical field of hydrometallurgy. Background technique [0002] Rare earth elements are known as "industrial vitamins", which have irreplaceable excellent magnetic, optical and electrical properties, and play a huge role in improving product performance, increasing product varieties, and increasing production efficiency. Due to the strong role of rare earth, the small amount of use has become an important element for improving product structure, increasing technological content, and promoting technological progress in the industry. It is widely used in metallurgy, military, new materials, petrochemical, glass ceramics, agriculture and other fields. [0003] Decomposing rare earth...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B59/00
CPCY02P10/20
Inventor 郭学益冯德茂谢元斌刘世良
Owner 湖南欧华科技有限公司
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