Separation method for rare earth elements in monazite

A rare earth element and separation method technology, which is applied in the direction of improving process efficiency, can solve problems such as difficult removal, and achieve the effect of increasing the recovery rate of rare earth

Inactive Publication Date: 2018-05-15
宁波市鄞州智伴信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it often contains uranium, thorium, and radium, it has high radioactivity. Monazite contains a large amount of rare earth elements, but it is also very dif

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The invention provides a method for separating rare earth elements in monazite, comprising the following steps:

[0021] Step 1): firstly grind the monazite ore and mixed rare earth ore into ore powder, the particle size of the ore powder is -80um, first adopt open-circuit grinding in batches, and then use imitation closed-circuit grinding, the method is to grind the selected raw ore to After a certain period of time, sieve out products with a particle size of -70um or more, and regrind the products on the sieve. The amount of water for regrinding should be added according to the weight of the products on the sieve and the grinding concentration when grinding the raw ore. When it is above 80%, wash the ore powder with water.

[0022] Step 2): According to the ratio of monazia slag (㎏):acid (L)=1:1~15, add monazia slag to the sulfuric acid solution with a concentration of 0.25mol / L~0.5mol / L, and heat to 40 ℃ ~ 100 ℃, stirring for 5 hours to 8 hours, cooling and standing...

Embodiment 2

[0028] The invention provides a method for separating rare earth elements in monazite, comprising the following steps:

[0029] Step 1): firstly grind the monazite ore and mixed rare earth ore into ore powder, the particle size of the ore powder is -80um, first adopt open-circuit grinding in batches, and then use imitation closed-circuit grinding, the method is to grind the selected raw ore to After a certain period of time, sieve out products with a particle size of -70um or more, and regrind the products on the sieve. The amount of water for regrinding should be added according to the weight of the products on the sieve and the grinding concentration when grinding the raw ore. When it is above 80%, wash the ore powder with water.

[0030] Step 2): According to the ratio of monazia slag (㎏):acid (L)=1:1~15, add monazia slag to the sulfuric acid solution with a concentration of 0.25mol / L~0.5mol / L, and heat to 40 ℃ ~ 100 ℃, stirring for 5 hours to 8 hours, cooling and standing...

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PUM

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Abstract

The invention discloses a separation method for rare earth elements in monazite. The method comprises the following steps that monazite and a rare earth ore are mixed and ground into ore powder at first, the particle size of the ore powder is -80 microns, batch open-circuit grinding is adopted at first, then simulation-closed-circuit grinding is adopted, and a method adopted for grinding comprisesthe substeps that after selected crude ore is ground for a certain time, products with the particle sizes being equal to or greater than -70 microns are screened out, oversize products are reground,water is added during regrinding according to the oversize product weight and the ore grinding concentration during crude ore grinding, and ore powder is washed after the content of ore powder with the particle size being -50 microns reaches 80% or above; and monazite slag (in kg) is added into a sulfuric acid solution (in L) with the concentration being 0.25-0.5 mol/L according to the proportionof the monazite slag to acid being 1:1-15, a mixture is heated to 40-100 DEG C, stirring is conducted for 5-8 h, cooling, still standing and clarification are conducted for 4-8 h, and a solution containing valuable elements of uranium, thorium and rare earth is obtained through siphoning of a supernatant.

Description

technical field [0001] The invention relates to a rare earth in monazite, in particular to a method for separating rare earth elements in monazite. Background technique [0002] Monazite is one of the main minerals of rare earth metal ore, often containing thorium, zirconium and so on. Monoclinic crystal system, the crystals are in the form of fine plates. Brown-red, yellow or yellow-green, oily luster or glass luster, conchoidal to uneven fracture. Brittle in nature, hardness 5-5.5, density 4.9-5.5g / cm3. It emits bright green fluorescence under ultraviolet light. Because it often contains uranium, thorium, and radium, it has high radioactivity. Monazite contains a large amount of rare earth elements, but it is also very difficult to remove harmful radioactive substances such as uranium. Therefore, a rare earth element in monazite is urgently needed in the industry. Separation method. Contents of the invention [0003] The purpose of the present invention is to provid...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/06C22B59/00C22B60/02C22B3/38
CPCC22B3/065C22B3/08C22B59/00C22B60/0234C22B60/0239C22B60/026C22B60/0291C22B3/3846Y02P10/20
Inventor 朱小英
Owner 宁波市鄞州智伴信息科技有限公司
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