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Method for treating monazite by virtue of two-stage thermal alkali decomposition process

A technology of monazite and hot alkali is applied in the thermal alkali decomposition and treatment of monazite concentrate, improving the treatment field of decomposing monazite and rare earth ore, and can solve the problems of lowering treatment temperature, low operation safety, shortening treatment time, etc. The effect of improving efficiency, more dust and reducing process cost

Pending Publication Date: 2019-05-10
湖南中核金原新材料有限责任公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to propose a new monazite decomposition treatment method for the existing monazite decomposition treatment method, which requires high temperature and long holding time; low operation safety and high energy consumption. The monazite decomposition treatment method can effectively reduce the treatment temperature, shorten the treatment time, and decompose monazite more economically, efficiently and environmentally

Method used

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  • Method for treating monazite by virtue of two-stage thermal alkali decomposition process

Examples

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Effect test

example 1

[0033]In domestic professional equipment, -100 mesh monazite (content REO51%) is calculated according to the weight ratio of monazite: caustic soda = 1:1.4, and 55% lye is prepared in professional equipment, and lye: monazite = The ratio of 2.5:1 is weighed; the lye is transported to the professional equipment for high-speed stirring, and the monazite is slowly added to the professional equipment, and the slurry is heated to 100-130°C through the external heating device, and pumped into the grinding and soaking machine for grinding Side dipping, the reaction time is 40min, the rotating speed of the mill dipping machine is 2200r / min, and the medium of the mill dipping machine is zirconia. The slurry enters the grinding and soaking machine from one end of the grinding and soaking machine; the slurry after grinding and soaking is directly sent from the outlet of the milling and soaking machine to the stirring reaction tank, and is heated to 130-140°C; after 4 hours of heat preserv...

example 2

[0035] In domestic professional equipment, -80 mesh monazite (content REO56%) is calculated according to the weight ratio of monazite: caustic soda = 1:1.3, and 50% lye is prepared in professional equipment, and lye: monazite = 2. The ratio of 2:1 is weighed; the lye is transported to the professional equipment for high-speed stirring, and the monazite is slowly added to the professional equipment, and the slurry is heated to 90-110°C through an external heating device, and pumped into the grinding and soaking machine for edge grinding Soaking, reaction time 25min, milling and soaking machine speed 2000r / min, milling and soaking machine medium is zirconia, the slurry enters the milling and soaking machine from one end of the milling and soaking machine; the slurry after milling and soaking is directly sent from the outlet of the milling and soaking machine to the stirring reaction Tank, heated to 130-140 ° C; after 4 hours of heat-retaining and stirring reaction, washing and fi...

example 3

[0037] In domestic professional equipment, -50 mesh monazite (content REO62%) is calculated according to the weight ratio of monazite: caustic soda = 1:1.2, and 45% lye is prepared in professional equipment, and lye: monazite = 2. The ratio of 8:1 is weighed; the lye is transported to the professional equipment for high-speed stirring, and the monazite is slowly added to the professional equipment, and the slurry is heated to 80-100°C through an external heating device, and then pumped into the grinding and soaking machine after high-speed stirring , reacted for 15 minutes, the speed of the milling and soaking machine was 2300r / min, the medium of the milling and soaking machine was alumina, and the slurry entered the milling and soaking machine from one end of the milling and soaking machine; the slurry after milling and soaking was directly sent to the stirring reaction tank from the outlet of the milling and soaking machine, After raising the temperature to 130-140°C; after i...

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Abstract

The invention discloses a method for treating a monazite by virtue of two-stage thermal alkali decomposition process. The method for treating the monazite by virtue of the two-stage thermal alkali decomposition process is characterized in that the monazite materials are treated by adopting a two-stage manner of grinding and agitation leaching; firstly, wet-process grinding and leaching is carriedout on the monazite materials in a grinding and leaching machine, then the materials subjected to wet-process grinding and leaching are input into a monazite alkali decomposition tank, hot-alkali decomposition and agitation leaching are carried out, and the ultrafine monazite ore decomposition materials are prepared by the two-stage manner of wet-process grinding and leaching and hot-alkali decomposition and agitation leaching. According to the method for treating the monazite by virtue of the two-stage thermal alkali decomposition process, a two-stage continuous operation mode of grinding andagitation leaching is adopted, grinding and leaching are carried out at the same time, so that the monazite decomposition rate and the metal recovery rate are improved, the alkali decomposition period is shortened, the process cost is reduced, the energy consumption and time are saved, the working environment is greatly improved, the production efficiency is improved, the method for treating themonazite is high in adaptability, clean, efficient and rapid, and the effect of reasonable, economical, environment-friendly and energy-saving treatment of the monazite is achieved.

Description

technical field [0001] The invention relates to a treatment method of rare earth ore, in particular to a method for thermal alkali decomposition treatment of monazite concentrate, which is mainly used to improve the method of decomposing monazite, 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] Monazite is a rare earth phosphate mineral (mainly ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B59/00
CPCY02P10/20
Inventor 郭学益谢凌峰谢元斌刘世良许昆李恩明刘浩
Owner 湖南中核金原新材料有限责任公司
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