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Production method and device for extracting rare earth from monazite ores

A technology for monazite ore and rare earth, which is applied in the field of rare earth extraction, can solve the problems of physical injury of operators, high labor intensity of workers, and high production cost, and achieve the effects of reducing energy consumption, reducing impurity removal procedures, and reducing production and operation costs.

Inactive Publication Date: 2015-12-30
包头市锦园化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The process adopts monomer intermittent production, which has high production cost, high energy consumption, low production efficiency, waste water discharge in the production process, high labor intensity of workers, poor production environment, and easy to cause physical injury to operators

Method used

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  • Production method and device for extracting rare earth from monazite ores
  • Production method and device for extracting rare earth from monazite ores
  • Production method and device for extracting rare earth from monazite ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Take 320 mesh, 53% rare earth content of monazite ore powder 300g, temperature 155℃ as an example

[0051] Process steps:

[0052] 1. Weigh 300g of monazite ore powder into the reactor;

[0053] 2. Prepare NaOH solution with 288g of solid alkali with a content of 96% and 1006ml of water and add it to the reactor;

[0054] 3. Start the reactor mixer and heater, adjust the stirring speed to 180 rpm, and start timing after boiling;

[0055] 4. When the temperature rises to 155°C, the temperature is kept constant, controlled at 155±5°C, and the reaction time is controlled at 240±10 minutes;

[0056] 5. Decomposition products were diluted, filtered, washed, and dried. The total volume after dilution was 3568ml, and the washing water was 1200ml; the output of phosphorus lye was 3425ml, and the output of alkali cake was 325.2g;

[0057] 6. Cool and crystallize the phosphorus lye, and start to filter when the temperature is lowered to 40 degrees, and produce 400g of trisodiu...

Embodiment 2

[0063] Take 320 mesh, 53% rare earth content of monazite ore powder 300g, temperature 130℃ as an example

[0064] Process steps:

[0065] 1. Weigh 300g of monazite ore powder into the reactor;

[0066] 2. Prepare NaOH solution with 288g of solid alkali with a content of 96% and 1006ml of water and add it to the reactor;

[0067] 3. Start the reactor mixer and heater, adjust the stirring speed to 180 rpm, and start timing after boiling;

[0068] 4. When the temperature rises to 130°C, the temperature is kept constant, controlled at 130±5°C, and the reaction time is controlled at 380±10 minutes;

[0069] 5. Decomposition products were diluted, filtered, washed, and dried. The total volume after dilution was 3592ml, and the washing water was 1200ml; the output of phosphorus lye was 3425ml, and the output of alkali cake was 325.2g;

[0070] 6. Cool and crystallize the phosphorus lye, and start to filter when the temperature is lowered to 40 degrees, and produce 398g of trisodiu...

Embodiment 3

[0076] Take 320 mesh, 53% rare earth content of monazite ore powder 300g, temperature 170℃ as an example

[0077] Process steps:

[0078] 1. Weigh 300g of monazite ore powder into the reactor;

[0079] 2. Prepare NaOH solution with 288g of solid alkali with a content of 96% and 1006ml of water and add it to the reactor;

[0080] 3. Start the reactor mixer and heater, adjust the stirring speed to 180 rpm, and start timing after boiling;

[0081] 4. When the temperature rises to 170°C, the temperature is kept constant, controlled at 170±5°C, and the reaction time is controlled at 240±10 minutes;

[0082] 5. Decomposition products were diluted, filtered, washed, and dried. The total volume after dilution was 3521ml, and the washing water was 1200ml; the output of phosphorus lye was 3420ml, and the output of alkali cake was 325g;

[0083] 6. Cool and crystallize the phosphorus lye, and start to filter when the temperature is lowered to 40 degrees, and produce 399g of trisodium ...

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Abstract

The invention relates to a method and a device for extracting rare earth, in particular to a production method and device for extracting the rare earth from monazite ores. The production operation stability is guaranteed by means of a caustic decomposition procedure, a washing procedure, a chlorination procedure, a phosphorus base liquor fine filtration and crystallization procedure as well as a special JQL reactor and a full-automatic metering system; by the aid of the JQL reactor as caustic decomposition equipment, fully-enclosed continuous and automatic operation is realized, heat energy consumption and alkali consumption are reduced, the labor intensity of workers is reduced, wastewater emission is avoided in a production process, the production efficiency is high, the rare earth yield is increased, and the worker bodies are prevented from radiation injury caused by radioactive substances. The clean, automatic, and fully-enclosed continuous production operation mode is realized by the aid of equipment, the utilization rate of the equipment is increased greatly, and the operation cost of the equipment is reduced.

Description

technical field [0001] The invention relates to a method and device for extracting rare earth, in particular to a production method and device for extracting rare earth from monazite ore. Background technique [0002] The main chemical composition of monazite ore is (Ce, La, Nd, Th) [PO4], and the crystal belongs to monoclinic phosphate mineral. Monazite ore is the main rare earth mineral, light rare earth (cerium group) oxides account for 39-74%, heavy rare earth (yttrium group) oxides account for 0~5%, the color is mainly yellow, followed by light yellow or yellowish white. Rare earth elements are widely used in ferrous and nonferrous metallurgy, glass and ceramic production, electronics, electric lighting, television and laser technology, chemical industry, medical treatment and agricultural production. It is also produced in hydrothermal deposits associated with granite. In addition, it can often be enriched to form placer deposits. Monazite is an important mineral ra...

Claims

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Application Information

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IPC IPC(8): C22B3/02C22B59/00
CPCY02P10/20
Inventor 郝胜民史双勤郝胜维
Owner 包头市锦园化工科技有限公司
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