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Comprehensive utilization technique for hamartite and celestite paragenic ore

A technology of bastnaesite and symbiotic ore, which is applied in the field of comprehensive utilization technology of bastnaesite and celestite symbiotic ore, can solve the problems of low rare earth recovery rate, low recovery rate, and low grade of rare earth concentrate, and achieve simplified Re-election, improve the grade, and facilitate the effect of stable and smooth flow

Inactive Publication Date: 2008-04-09
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the grade of rare earth concentrate is low, only about 51%, which is 15-20% lower than the concentrate grade produced by single bastnaesite; the recovery rate of rare earth is low, only about 60%, which is lower than that of single bastnaesite The recovery rate is 20% to 30% lower
In addition, the recovery rate of lapis lazuli is low, less than 55%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1000.00g of Dechang rare earth raw ore (REO 5.01%; SrO 7.55%), finely break to -200 mesh to account for 80%, add 2% hydroxamic acid (salt) as a collector, add an appropriate amount of alkali to inhibit Agent, can produce 217.0g of mixed concentrate. At a temperature of 500°C to 600°C, the concentrate was oxidized and roasted for 2.0 hours, and the calcined sand weighed 196.7g. The calcine is leached with concentrated hydrochloric acid at room temperature for 0.5h to 3.0h, and 147.8g of leaching residue (celestite) can be obtained, and the grade of celestite is between 65% and 90%. The immersion solution is a mixed rare earth chloride solution, and the rare earth leaching rate is between 95% and 98%. During the dressing and smelting process, the total recovery rate of celestite is ≥89%; the total recovery rate of rare earth is ≥92%.

Embodiment 2

[0020] Weigh 1000.00g of Dechang rare earth raw ore (REO 5.01%; SrO 7.55%), finely break to -200 mesh, account for 75%, add 2% hydroxamic acid (salt) as a collector, add an appropriate amount of alkali to inhibit Agent (soda ash or water glass, etc.), synchronous flotation to get 216.8g of mixed concentrate. At a temperature of 500-600°C, oxidize and roast the concentrate for 1-2.0 hours to obtain calcined sand with a weight of 196.2g. The calcine is leached with concentrated hydrochloric acid at room temperature for 0.5-3 hours, and 148.3 g of leaching residue (celestite) can be obtained, and the grade of celestite is between 65% and 90%. The immersion solution is a mixed rare earth chloride solution, and the rare earth leaching rate is between 95% and 98.5%. During the dressing and smelting process, the total recovery rate of celestite is ≥88.5%; the total recovery rate of rare earth is ≥90.5%.

Embodiment 3

[0022] Weigh 1000.00g of Dechang rare earth raw ore (REO 5.01%; SrO 7.55%), finely break to -200 mesh to account for 80%, add 2% hydroxamic acid (salt) as a collector, add an appropriate amount of alkali to inhibit agent (sodium carbonate, etc.), capable of producing 218.9g of mixed concentrate. At a temperature of 500-600°C, oxidize and roast the concentrate for 1.0-2.0 hours to obtain calcined sand with a weight of 198.7g. Use 3mol / L dilute hydrochloric acid to leach the calcined sand at room temperature for 0.5-3.0h to obtain lanthanum-rich rare earth solution and primary leaching residue (containing cerium), and then soak the above-mentioned primary leaching residue with 8mol / L concentrated hydrochloric acid for 0.5-3.0h , can get cerium-rich rare earth solution and 148.2g secondary leaching residue (celestite), the grade of celestite is between 75% and 90%. The total leaching rate of rare earth is between 95% and 99%. During the dressing and smelting process, the total ...

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Abstract

The invention relates to a technique to comprehensively utilizing an intergrown ore of bastnaesite and celestite. The detailed steps of the technique comprises: firstly the raw material of intergrown ore of bastnaesite and celstite are crashed until the -200 orders taking up 60-90%; secondly proper collecting agent and alkalis inhibitor are added, and compound concentrate is obtained; thirdly under the temperature of 500-600 DEG C, the concentrate is roasted for 1.5 to 2.5 hours so as to obtain calcine; finally, the calcine is leached with concentrated hydrochloric acid in normal temperature for 0.5 to 3.0 hours, the leaching slag is celestite and the leaching solution is blended rare earth chloride solution. The invention can greatly increase the recycle rate of the rare earth and celestite and the grade of celestite concentrate, meet the further processing requirements of celestite; besides, the separation of the blended concentrate integrates closely with the existing rare earth production, no extra investment of equipments is needed, the existing roasting and leaching devices is expanded; furthermore, the invention simplifies gravity separation and flotation operation, which is good for the stability of the production.

Description

technical field [0001] The invention relates to the technical field of rare earth ore smelting, in particular to a comprehensive utilization process of bastnaesite and celestite symbiotic ore. Background technique [0002] In the existing production process, people usually regard the bastnaesite and celestite paragenetic ore as a single bastnaesite for mineral separation, that is, use the gravity separation process to separate the celestite, and use the flotation process to enrich rare earths and produce rare earths. concentrate. As a result, the grade of rare earth concentrate is low, only about 51%, which is 15-20% lower than the concentrate grade produced by single bastnaesite; the recovery rate of rare earth is low, only about 60%, which is lower than that of single bastnaesite The recovery rate is 20%-30% lower. In addition, the recovery rate of lapis lazuli is low, less than 55%. Contents of the invention [0003] In view of the above problems, the main purpose of...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/10C22B1/14C22B1/02
CPCY02P10/20
Inventor 朱昌洛熊述清
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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