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Device and method for continuously removing sulfate radical with rare earth solution

A technology of rare earth solution and sulfate radical, applied in the direction of improving process efficiency, etc., can solve the problems of manual addition of barium chloride heavy metal poisoning, low equipment utilization rate, low automation level, etc., to improve the first pass rate of products and reduce labor intensity , the effect of improving labor efficiency

Pending Publication Date: 2019-01-25
CHINA NORTHERN RARE EARTH (GROUP) HIGH TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] There are the following problems in adopting the above-mentioned process: one is high energy consumption and unbalanced energy consumption; the other is high labor intensity; the third is that the operation mode is intermittent and the automation level is low; the fourth is that the utilization rate of equipment is low; Barium oxide presents a risk of heavy metal poisoning

Method used

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  • Device and method for continuously removing sulfate radical with rare earth solution

Examples

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Comparison scheme
Effect test

Embodiment 1

[0061] SO in rare earth chloride raw material solution 4 2- / REO=0.10%, REO=2.1mol / L, raw material liquid temperature 19°C. A total of 6 reaction tanks, the given flow rate of raw material liquid is 8m 3 / h, after calculation, the given amount of barium chloride is 10kg / h. Start the stirring from the 1st to the 6th stage, the raw material liquid is fed by the material liquid flow control system, first enters the sixth stage to exchange heat with the hot material, the temperature of the raw material liquid rises from 19°C to 43°C, and the hot material drops from 71°C After reaching 46°C, the raw material solution after heat exchange enters the first stage to continue heating, and when it reaches 92°C, it flows into the second stage. The solution flows into the sixth stage step by step, and the heated material after cooling is poured into the plate frame for filtration to obtain a low-sulfate rare earth solution. The conditions control the sampling after 48 hours of operatio...

Embodiment 2

[0063] SO in rare earth chloride raw material solution 4 2- / REO=0.13%, REO=2.1mol / L, raw material liquid temperature 20°C. A total of 6 reaction tanks, the given flow rate of raw material liquid is 10m 3 / h, after calculation, the given amount of barium chloride is 15.6kg / h. Start the stirring from the 1st to the 6th stage, the raw material liquid is fed by the material liquid flow control system, and first enters the sixth stage to exchange heat with the hot material, the temperature of the raw material liquid rises from 20°C to 41°C, and the hot material drops from 72°C After reaching 45°C, the raw material solution after heat exchange enters the first stage to continue heating, and when heated to 90°C, it flows into the second stage. The automatic feeding system controls the addition of barium chloride to 15.6kg / h, and it is added from the second stage. The solution flows into the sixth stage step by step, and the cooled hot material is poured into the plate frame for f...

Embodiment 3

[0065] SO in rare earth chloride raw material solution 4 2- / REO=0.2%, REO=2.1mol / L, raw material liquid temperature 20°C. A total of 6 reaction tanks, the given flow rate of raw material liquid is 10m 3 / h, after calculation, the given amount of barium chloride is 21.67kg / h. Start the stirring from the 1st to the 6th stage, the raw material liquid is fed by the material liquid flow control system, and first enters the sixth stage to exchange heat with the hot material, the temperature of the raw material liquid rises from 20°C to 42°C, and the hot material drops from 72°C When the temperature reaches 45°C, the raw material after heat exchange enters the first stage to continue heating, and when it reaches 90°C, it flows into the second stage. The solution flows into the sixth stage step by step, and the cooled hot material is poured into the plate frame for filtration to obtain a low-sulfate rare earth solution. The conditions control the sampling after 48 hours of operat...

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Abstract

The invention discloses a device for continuously removing a sulfate radical with a rear earth solution. The device structurally comprises feeding equipment, multiple continuous precipitation tanks connected in series, a temperature sensor, filter equipment, heat exchanger, a flow controller and a total controller. The invention further discloses a method for continuously removing the sulfate radical with the rear earth solution. Accordingly, continuous production for removing the sulfate radical can be achieved, and the utilization rate of the equipment and the product first pass yield are improved.

Description

technical field [0001] The invention relates to a rare earth hydrometallurgy technology, in particular to a device and method for continuously removing sulfate radicals from a rare earth solution. Background technique [0002] In the process of rare earth hydrometallurgy, the decomposition of rare earth concentrate is usually roasted at high temperature with concentrated sulfuric acid, and the rare earth chloride solution (SO 4 2- / REO percentage concentration 0.1%-5%), the rare earth chloride solution is prone to emulsification during the subsequent rare earth extraction and separation production process, which affects the normal extraction and also causes SO in the final rare earth product 4 2- On the high side. In order to eliminate SO in the rare earth solution 4 2- The effect, according to Ba 2+ +SO 4 2- = BaSO 4 The reaction principle of ↓, the rare earth industry has been using barium ions to remove sulfate radicals in the solution, the specific operation pro...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/44
CPCC22B3/44C22B59/00Y02P10/20
Inventor 许慧赵治华桑晓云李婷婷侯利生王蒙军李治国曹磊李俊平张磊
Owner CHINA NORTHERN RARE EARTH (GROUP) HIGH TECH CO LTD