A process for smelting and separating uranium, thorium and rare earth from monazite concentrate

A process method, ore concentrate technology, which is applied in the field of smelting and separating uranium, thorium and rare earth, can solve the problems of endangering the ecological environment and achieve the effect of low consumption

Active Publication Date: 2021-07-20
湖南中核金原新材料有限责任公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of traditional monazite concentrate smelting, separation and recovery of rare earth chloride mixture, because valuable resources such as uranium and thorium have not been comprehensively recovered, existing monazite processing enterprises will produce a large amount of excellent molten slag, which is excellent Radioactive nuclides such as uranium and thorium in the molten slag are discarded, seriously endangering the ecological environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A process for smelting and separating uranium, thorium and rare earth from monazite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Monazite concentrate (REO: 52.61%, ThO 2 : 4.03%, CaO: 2.06%, TiO 2 :1.84%, ZrO 2 : 2.85%, SiO 2 : 2.73%, Fe 2 o 3 : 2.92%, U 3 o 8 : 1.14%), after unpacking, it is transported to the monazite silo by the belt conveyor system, and then discharged through the outlet of the lower part of the silo and sent into the 50% to 60% sodium hydroxide solution in the stirring slurry tank, according to 1 times The ratio of the volume to the weight of the pulp is used for pulping and uniform mixing. The pulp is pumped into the bead mill through the rubber tube. Under normal pressure or micro pressure, after grinding, the pulp with a particle size of -320 mesh (accounting for more than 99.5%) is classified by the built-in The device is classified and discharged from the mill.

[0069] Pump the slurry with a particle size of 320 mesh (accounting for more than 99.5%) into the permanent magnet magnetic separator. The magnetic separation strength of the magnetic separator is 1.2T; ...

Embodiment 2

[0085] Monazite concentrate (REO: 50.82%, ThO 2 : 4.29%, CaO: 2.63%, TiO 2 :2.82%, ZrO 2 : 6.71%, SiO 2 : 3.46%, Fe 2 o 3 :3.09%, U 3 o 8 : 0.98%) After being unpacked, it is transported to the monazite silo by a belt conveyor system, and then discharged through the outlet at the lower part of the silo and sent into the 50% to 60% sodium hydroxide solution in the stirring slurry tank, according to 1 times The ratio of the volume to the weight of the pulp is used for pulping and uniform mixing. The pulp is pumped into the bead mill through the rubber tube. Under normal pressure or micro pressure, after grinding, the pulp with a particle size of -320 mesh (accounting for more than 99.5%) is passed through the built-in classification device. Classification is carried out and discharged from the mill.

[0086] Pump the slurry with a particle size of 320 mesh (accounting for more than 99.5%) into the permanent magnet magnetic separator. The magnetic separation strength of th...

Embodiment 3

[0102] Monazite concentrate (REO: 51.24%, ThO 2 : 4.01%, CaO: 2.01%, TiO 2 :2.28%, ZrO 2 : 2.79%, SiO 2 : 2.86%, Fe 2 o 3 : 2.87%, U 3 o 8 : 1.58%), after unpacking, it is transported to the monazite silo by the belt conveyor system, and then discharged through the outlet of the lower part of the silo and sent into the 50% to 60% sodium hydroxide solution in the stirring slurry tank, according to 1 times The ratio of the volume to the weight of the pulp is used for pulping and uniform mixing. The pulp is pumped into the bead mill through the rubber tube. Under normal pressure or micro pressure, after grinding, the pulp with a particle size of -320 mesh (accounting for more than 99.5%) is classified by the built-in The device is classified and discharged from the mill.

[0103] Pump the slurry with a particle size of 320 mesh (accounting for more than 99.5%) into the permanent magnet magnetic separator. The magnetic separation strength of the magnetic separator is 1.2T; ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a process method for smelting and separating uranium, thorium and rare earth from monazite concentrate, using monazite concentrate as raw material, adopting wet bead mill crushing, magnetic separation to remove iron, alkali decomposition transformation, trisodium phosphate Product preparation, alkali cake plus hydrochloric acid excellent solution, rare earth chloride mixture product preparation, high-quality molten slag plus hydrochloric acid full solution, amine extraction and extraction of uranium and uranium product preparation, acidic phosphorus-containing extraction of thorium and crude thorium product preparation, waste water Treatment and other steps make the recovery rate of uranium, thorium, rare earth and other valuable resources greater than 95%. After extracting thorium, the raffinate water phase is returned to the excellent solution to recover the rare earth chloride mixture. Most of the production process water is directly returned for recycling, and a small part of the wastewater is returned to the system for utilization after comprehensive treatment to achieve zero discharge of wastewater. The invention has reliable process technology, common chemical materials and low consumption. Guaranteeing the use of monazite resources in a green, efficient and clean production has obvious social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of uranium and thorium recovery, in particular to a process for smelting and separating uranium, thorium and rare earth from monazite concentrate. Background technique [0002] Monazite is a phosphate mineral of rare earth and thorium and uranium. It is one of the important rare earth minerals and the earliest rare earth mineral to be used in industry. Monazite concentrate smelting, separation and recovery of rare earth chloride mixture generally adopts the process of first alkali decomposition and then hydrochloric acid to extract the rare earth chloride mixture, but the recovery rate of rare earth is low, and valuable resources such as uranium and thorium have not been recovered and utilized. , The discharge of waste water is large and difficult to meet the discharge standards, and the amount of waste residue is large and cannot be properly preserved. It does not meet the relevant provisions of the safety ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22B60/02C22B3/28C22B59/00C22B3/44C22B3/40C22B1/00C01F17/271C01F15/00C01B25/30
CPCC01B25/30C22B1/00C22B3/44C22B59/00C22B60/0208C22B60/0278C22B60/0291C22B3/282C22B3/409Y02P10/20
Inventor 曾中贤谢凌峰刘浩施雨张伟超李春湘段颖杰张伟华
Owner 湖南中核金原新材料有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap