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Method for effectively removing chlorine and sodium ions in rare earth precipitation process

A precipitation process, sodium ion technology, applied in the direction of improving process efficiency, can solve problems such as low production efficiency, uneven washing, large water consumption, etc.

Inactive Publication Date: 2018-06-08
CHALCO GUANGXI RARE EARTH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for effectively removing chlorine and sodium ions in the rare earth precipitation process, solve the problem of uneven washing by adding a stirring rod, install an ultrasonic flowmeter to monitor and adjust the flow of pure water in real time, and install an online acidity Real-time monitoring of washing liquid
In order to solve the problems of large water consumption, uneven washing, low production efficiency, non-energy saving and environmental protection caused by improper control of the water volume in the above washing process

Method used

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  • Method for effectively removing chlorine and sodium ions in rare earth precipitation process
  • Method for effectively removing chlorine and sodium ions in rare earth precipitation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for effectively removing chlorine and sodium ions in a rare earth precipitation process, specifically comprising the following steps:

[0030] (1) adding scandium chloride feed solution and saturated oxalic acid solution into the reaction kettle respectively, wherein the saturated oxalic acid solution is added in two batches, and the precipitation process is completed in the reaction kettle to form a rare earth oxalic acid precipitate;

[0031] (2) the oxalic acid rare earth precipitation is discharged in the filter barrel, and stirring bar is installed in the filter barrel;

[0032] (3) Input pure water with a temperature of 85°C into the filter barrel through the water pipe from the top of the filter barrel. An ultrasonic flowmeter is installed on the valve of the water pipe, and the ultrasonic flowmeter is connected to PLC1 to realize real-time monitoring of the flow of pure water;

[0033] (4) start stirring bar simultaneously, and stirring speed is 210r / mi...

Embodiment 2

[0038] A method for effectively removing chlorine and sodium ions in a rare earth precipitation process, specifically comprising the following steps:

[0039] (1) adding the praseodymium and neodymium chloride feed solution and the saturated oxalic acid solution into the reaction kettle respectively, wherein the saturated oxalic acid solution is added in two batches, and the precipitation process is completed in the reaction kettle to form a rare earth oxalic acid precipitate;

[0040] (2) the oxalic acid rare earth precipitation is discharged in the filter barrel, and stirring bar is installed in the filter barrel;

[0041] (3) Input pure water with a temperature of 88°C into the filter barrel through the water pipe from the top of the filter barrel. An ultrasonic flowmeter is installed on the water pipe valve, and the ultrasonic flowmeter is connected to PLC1 to realize real-time monitoring of the pure water flow;

[0042] (4) start stirring bar simultaneously, and stirring ...

Embodiment 3

[0047] A method for effectively removing chlorine and sodium ions in a rare earth precipitation process, specifically comprising the following steps:

[0048] (1) Add the samarium, europium and gadolinium chloride feed solution and the saturated oxalic acid solution into the reactor respectively, wherein the saturated oxalic acid solution is added in two batches, and the precipitation process is completed in the reactor to form a rare earth oxalate precipitate;

[0049] (2) the oxalic acid rare earth precipitation is discharged in the filter barrel, and stirring bar is installed in the filter barrel;

[0050] (3) Input pure water with a temperature of 92°C into the filter barrel through the water pipe from the top of the filter barrel. An ultrasonic flowmeter is installed on the valve of the water pipe, and the ultrasonic flowmeter is connected to PLC1 to realize real-time monitoring of the flow of pure water;

[0051] (4) start stirring bar simultaneously, and stirring speed ...

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Abstract

The invention discloses a method for effectively removing chlorine and sodium ions in a rare earth precipitation process. The method particularly comprises the following steps of (1), adding rare earth chloride feed liquid and a saturated oxalic acid solution into a reaction kettle, and completing the precipitation process, so as to form a rare earth oxalate precipitate; (2), discharging the rareearth oxalate precipitate into a filter vat, wherein agitating rods are mounted in the filter vat; (3), inputting pure water into the filter vat from the top of the filter vat through a water pipe, wherein a valve on the water pipe is provided with an ultrasonic flow meter; (4), starting the agitating rods at the same time, and washing the rare earth oxalate precipitate while agitating; (5), detecting the PH (Potential of Hydrogen) value of a washing solution in real time by utilizing an on-line acidimeter mounted in the filter vat; (6), completely discharging the washing solution each time during washing, and then carrying out next washing; (7), collecting the washing solution, carrying out treatment, and then recycling, so that the precipitation process is completed. The method providedby the invention can be used for enabling the water consumption in a washing process to be a little, is uniform in washing and has energy-saving and environment-protection effects.

Description

technical field [0001] The invention relates to the technical field of rare earth hydrometallurgy, in particular to a method for effectively removing chlorine and sodium ions in a rare earth precipitation process. Background technique [0002] Rare earth is known as the "treasure house" of new materials and the "monosodium glutamate" of industry. Due to the importance of rare earth materials, it has attracted widespread attention and attention from the world's scientific community. my country is the country with the richest rare earth resources in the world, ranking first in the world in terms of rare earth reserves and production, and also has advanced extraction and separation technology. However, there is a big gap between my country and foreign countries in the application of rare earths, especially because the extraction equipment is relatively backward and the level of automation is low, resulting in lower direct recovery of rare earth elements and purity of rare earth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/46
CPCC22B3/46C22B59/00Y02P10/20
Inventor 韦世强娄战荒吴忠何张亮久莫国荣蒋超超梁壮卢阶主龙江志杨振强杨金涛庄辉羊多彦李飞龙况涛许旭升
Owner CHALCO GUANGXI RARE EARTH DEV CO LTD