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Method and system for treating rare earth ore concentrate through rotary table

A rare earth concentrate and rotary bed technology, applied in the direction of improving process efficiency, can solve the problems of increased production costs, poor economic benefits, and high caustic soda prices, and achieve the effects of improved economic benefits, low alkali consumption, and good environmental protection indicators

Active Publication Date: 2017-03-15
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of alkali used in the above method is too high, and the amount of sodium hydroxide is as high as 50% or even 150% of the rare earth concentrate quality.
The high price of caustic soda leads to an increase in the production cost of the process, making the economic benefit poor

Method used

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  • Method and system for treating rare earth ore concentrate through rotary table
  • Method and system for treating rare earth ore concentrate through rotary table

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] like figure 1 and 2 As shown, a rare earth mixed concentrate (containing monazite) with a REO content of 35wt% (weight%) is mixed with the additive sodium carbonate and the binder sodium carboxymethyl cellulose in a weight ratio of 100:10:0.3 in the batching device Mix evenly in S100, the mixture is made into pellets by molding device S200, spray 55% sodium hydroxide solution during the pelletizing process, and prepare rare earth raw pellets with a particle size of 8mm-12mm, the quality of sodium hydroxide in the pellets is the same as that of rare earth The mass ratio of the concentrate is 10:100. The pellets are dried at 150°C in the drying device S300 to obtain dry pellets with a water content of 1%. The dry pellets are roasted using a rotary bed roaster S400 at a roasting temperature of 1100°C, and the residence time of the pellets in the rotary bed roaster S400 is 30 minutes. The rotating bed is enclosed radiant heated with gas radiant tubes. After roasting, th...

Embodiment 2

[0054] Mix a rare earth concentrate (mainly phosphate) with a REO content of 58wt% with the additive sodium carbonate and binder sodium humate in a weight ratio of 100:50:1 in the batching device S100, and the mixture is molded using The device S200 makes pellets, and sprays 30% sodium hydroxide solution during the pelletizing process to produce rare earth raw pellets with a particle size of 6mm-9mm. The mass ratio of sodium hydroxide to rare earth concentrate in the pellets is 4:100. The pellets are dried at 100°C in the drying device S300 to obtain dry pellets with a water content of 2%. The dry pellets are roasted by a rotary bed roaster S400 at a roasting temperature of 900°C, and the residence time of the pellets in the rotary bed roaster S400 is 90 minutes. The rotating bed is enclosed radiant heated with gas radiant tubes. After roasting, the hot pellets are directly sent to the grinding device S500 for water quenching and wet grinding after water quenching. During the...

Embodiment 3

[0056] Mix a rare earth mixed concentrate (containing phosphate and fluorocarbonate) with a REO content of 65wt%, and the additive sodium carbonate and binder dextrin in a weight ratio of 100:30:3 in the batching device S100 to mix evenly, mix The material is made into pellets using a molding device S200, and 50% sodium hydroxide solution is sprayed during the pelletizing process to obtain rare earth raw pellets with a particle size of 16mm-20mm. The mass ratio of sodium hydroxide to rare earth concentrate in the pellets is 12 :100. The pellets are dried at 150°C in the drying device S300 to obtain dry pellets with a water content of 1%. The dry pellets are roasted by a rotary bed roaster S400 at a roasting temperature of 700°C, and the residence time of the pellets in the rotary bed roaster S400 is 120 min. The rotating bed is enclosed radiant heated with gas radiant tubes. After roasting, the hot pellets are directly sent to the grinding device S500 for water quenching and...

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Abstract

The invention discloses a method and system for treating rare earth ore concentrate through a rotary table. The system is formed by sequentially connecting a material preparing device, a forming device, a drying device, a rotary table roasting device, an ore grinding device, a solid-liquid separating device and a leaching device. According to the method and system for treating the rare earth ore concentrate through the rotary table, the caustic soda decomposing process of the rare earth ore concentrate can achieve continuous industrial production, alkali consumption is low, the economical efficiency is improved, and the environment protection index is good.

Description

technical field [0001] The invention relates to the technical field of rare earth metallurgy, in particular to a method for treating rare earth concentrates in a rotating bed. Background technique [0002] my country's rare earth reserves are the first in the world. However, most of the proven rare earth ores have complex components and low rare earth content, which is not conducive to direct industrial application. At present, the grade of mixed rare earth concentrates used in industrial production is generally 50% to 60%, while the rare earth content of raw ore is much lower than this level, so it is necessary to effectively remove gangue minerals and harmful impurities in raw rare earth ore, namely After the rare earth concentrate is obtained through mineral processing, the rare earth is extracted. However, the rare earth phosphate mineral (monazite) contained in the mixed rare earth mineral is very stable even at high temperature, and it is difficult to decompose it wit...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B1/24C22B1/02
CPCC22B1/02C22B1/2406C22B59/00Y02P10/20
Inventor 陈文亮刘占华丁银贵王岩王欣曹志成左晓鹏吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST