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Processing method of fine bastnaesite

A processing method and fluorocarbon cerium technology, applied in the field of metallurgy, can solve the problems of long process and low decomposition rate of carbonate decomposition and rare earth, and achieve the effects of high leaching rate, low consumption of auxiliary materials and simple process

Inactive Publication Date: 2015-10-07
CHINA ENFI ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbonate decomposition Rare earth decomposition rate is low and the process is long

Method used

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  • Processing method of fine bastnaesite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 200 orders, and the REO content is 68.29%. Adding 650g of concentration in the concentrate particles is 98% concentrated Sulfuric acid, mixed evenly, aged at 200°C for 4 hours, then roasted at 250°C for 2 hours, took the roasted solid material and soaked it in water at room temperature for 2 hours at a solid-to-liquid ratio of 1:10, filtered and washed after the leaching reaction Get the leaching slag, dry and test the residual REO content and ThO in the slag 2 content. The measured slag rate is 5.86%, the REO leaching rate is 96.12% based on slag, the thorium content in the slag is 290ppm, and the thorium leaching rate is above 98%.

[0039] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content i...

Embodiment 2

[0041] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 280 mesh, REO content 58.37%, add 500g massfraction 98% concentrated H in this concentrate 2 SO 4 , mixed evenly, aged at 210°C for 3 hours, then roasted at 280°C for 2 hours, took the roasted solid material and immersed it in water at room temperature for 1 hour at a solid-to-liquid ratio of 1:8, filtered and washed after the leaching reaction to obtain The leached slag was dried to test the residual REO content and ThO in the slag 2 content. The measured slag rate is 6.13%, the REO leaching rate is 95.47% based on slag, the thorium content in the slag is 207ppm, and the thorium leaching rate is 98.6%.

[0042] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content in the slag is within the range...

Embodiment 3

[0044] Get 500g of bastnaesite concentrate particles processed through ball milling, the average particle diameter of the bastnaesite concentrate particles after the ball milling is 240 mesh, REO content 67.25%, add 650g mass fraction 98% concentrated H in this concentrate 2 SO 4 , mixed evenly, matured at 180°C for 4 hours, then roasted at 260°C for 2 hours, took the roasted solid material and immersed it in water at room temperature for 1 hour according to the solid-to-liquid ratio of 1:10, filtered and washed after the leaching reaction to obtain The leached slag was dried to test the residual REO content and ThO in the slag 2 content. The measured slag rate is 6.08%, the REO leaching rate is 96.15% based on slag, the thorium content in the slag is 285ppm, and the thorium leaching rate is 98.02%.

[0045] The above method has simple process, high REO leaching rate, low energy consumption, less consumption of auxiliary materials, thorium radioactivity content in the slag i...

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Abstract

The invention discloses a processing method of fine bastnaesite. The processing method comprises the following steps: (1) carrying out ball-milling treatment on fine bastnaesite, so as to obtain fine bastnaesite particles; (2) mixing the fine bastnaesite particles with concentrated sulfuric acid, and curing, so as to obtain cured ores; (3) roasting the cured ores, so as to obtain roasted ores; (4) carrying out slurry mixing, water leaching and filtration on the roasted ores, so as to obtain leachate and leached slag; (5) extracting the leachate, so as to obtain rare earth and thorium-containing extraction liquid; (6) carrying out back extraction on the thorium-containing extraction liquid, so as to obtain thorium nitrate. By virtue of the processing method, Sichuan fine bastnaesite can be effectively processed, furthermore, the flow is simple, the REO leaching rate is high, the energy consumption is low, the consumption of auxiliary materials is low, meanwhile, the content of radioactive thorium is greatly decreased into a standard range, fluorine and radioactive thorium are not emitted in the whole process, the leached slag can be directly emitted after being washed, the environment is protected, furthermore, rare earth can be effectively separated, and fluorine and thorium resources can be comprehensively utilized, so that the processing method is a novel clean production process for metallurgical treatment of fine bastnaesite.

Description

technical field [0001] The invention belongs to the field of metallurgy, in particular, the invention relates to a treatment method of bastnaesite concentrate. Background technique [0002] my country is a country rich in rare earth resources in the world. Commonly used rare earth concentrates mainly include Baotou mixed rare earth concentrate (fluorocarbon ore and monazite), Sichuan rare earth concentrate (bastnaesium), Shandong Weishan rare earth concentrate (fluorocarbon Cerium), ion-adsorbed concentrates (seven southern provinces such as Jiexi, Pingyuan, Xunwu, Longnan, Chongzuo and other goblin concentrates, of which REO (rare earth oxides) accounted for 92%), monazite concentrates in Guangdong and Hunan . For bastnaesite, due to the different mineral forms, the physical and chemical properties of bastnaesite in different regions often have major differences. Sichuan bastnaesite is the second largest rare earth resource in my country, but the physical and chemical forms...

Claims

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Application Information

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IPC IPC(8): C22B60/02
Inventor 覃波王国珍韩连敬颜豪威邱爽唐建文陈云周文龙刘国邱雪明
Owner CHINA ENFI ENGINEERING CORPORATION
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