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Method for eliminating impurities of lead, zinc from nickel solution

A nickel solution, lead-zinc technology, applied in the field of removing lead-zinc impurities from nickel solution, can solve the problems of difficult engineering operation, long analysis operation cycle, large amount of analysis resin, etc., to achieve accelerated exchange, convenient operation, equipment simple structure

Inactive Publication Date: 2007-10-10
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of separating, purifying, purifying or selectively adsorbing various metals using ion exchange resins adopts a fixed bed string column operation method, and the adsorption and desorption are completed in the same equipment. Each analysis has a large amount of resin and a long analysis cycle. , there are many valves in the system, the control is strict, the engineering operation level is difficult, and the promotion is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Select the nickel system solution containing lead and zinc impurities, and adopt the dense moving bed-fluidized bed ion exchange method;

[0039] Compact moving bed: Φ1600×12500mm

[0040] Fluidized bed: Φ1100×5630mm

[0041] Put the treated weakly basic anion exchange resins with primary amine groups into D363 and D318 resins in a dense moving bed, the solution to be treated enters from the bottom of the dense moving bed, and is continuously adsorbed in the upward direction. Zinc will be adsorbed on the resin, and the liquid will flow out from the top after removing lead and zinc. Solution flow: 60m 3 / h; resin discharge volume: 1.5m 3 / time; liquid after adsorption: Pb<0.001g / l, Zn<0.0003g / l; the resin after saturation is put into the fluidized bed, firstly top wash with 1.5mol / L HCl solution, then analyze with tap water, The resin forms a fluidized operation in a fluidized bed. The resolved resin is regenerated with 2mol / L HCl in the fluidized bed, and the rege...

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PUM

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Abstract

This invention relates to a method for removing Pb2+ and Zn2+ impurities from Ni electrolyte during Ni production. The method utilizes a weak-alkaline anion exchange resin with primary amine groups ((R3N) +OH-) to adsorb Pb2+ and Zn2+ in the Ni electrolyte. The method alternately performs adsorption, elution and regeneration. Adsorption is performed in a packed moving bed, while elution and regeneration are performed in a fluidized bed. The packed moving bed / fluidized bed apparatus has such advantages as simple structure, easy operation, and little resin abrasion. The method can accelerate the exchange between the resin and trace elements, and can easily elute Pb2+ and Zn2+ impurities in Ni electrolyte.

Description

technical field [0001] The invention discloses a method for removing lead and zinc impurities from nickel solution, relating to a method for removing impurities in nickel electrolytic solution in the production process of metal nickel. Background technique [0002] At present, the method of removing trace impurities lead and zinc from nickel electrolyte is mostly treated by chemical precipitation. The chemical precipitation method will cause a large amount of metal loss, the operation is complicated, the labor intensity is high, and harmful gases are generated. [0003] The ion exchange resin is based on a synthetic polymer material as the skeleton, and then adopts various organic synthesis methods to connect a variety of different exchange groups, using the exchange groups of the ion exchange resin to absorb, exchange, and chelate ions, and then use the elution The agent elutes the adsorbed, exchanged and chelated ions, so as to achieve the purpose of separation and purifi...

Claims

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Application Information

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IPC IPC(8): C22B3/24B01D15/04B01J20/26C25C1/08
CPCY02P10/20
Inventor 李娟邓涛李吉忠马靖霞刘冬莉谭金盈
Owner JINCHUAN GROUP LIMITED
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