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Method for producing nickel chloride solution through leaching nickel hydroxide cobalt with hydrochloric acid

A nickel hydroxide cobalt, hydrochloric acid leaching technology, applied in the field of non-ferrous metallurgy, can solve the problems of production site environmental impact, etc., achieve the effect of easy control of process parameters, low nickel content, and inhibition of chlorine gas generation and overflow

Active Publication Date: 2015-01-28
金川集团镍盐有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the nickel and cobalt hydroxide produced by the ammonia leaching of nickel laterite ore contains strong oxidizing substances (generally considered to be potassium permanganate), during the hydrochloric acid leaching process, when the solution [H + ] When the concentration is high, chlorine gas will be produced due to excessive hydrochloric acid and reaction with strong oxidizing substances, which will have a great impact on the environment of the production site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The composition of nickel cobalt hydroxide used in the leaching process is shown in Table 1.

[0016] Table 1 Example 1 nickel hydroxide cobalt composition / %

[0017] Ni co Cu Fe Zn mn Ca Mg Na h 2 o 42.27 0.72 0.01 0.07 0.14 0.86 0.08 0.77 0.022 51.00

[0018] The first step: two-stage leaching, using 3 reactors to operate in series, and the 3 reactors are respectively numbered 1 # ,2 # 、3 # ,at 1 # Add nickel chloride solution to the reaction kettle first, then add hydrochloric acid and a section of leaching residue for leaching, add hydrochloric acid and nickel-cobalt hydroxide for initial leaching, and monitor the solution [H + ] concentration is 0.47mol / L, 1 # After the reactor is full, the slurry flows through the overflow pipe to 2 # In the reactor, at the same time 2 # Reactor adds hydrochloric acid and nickel cobalt hydroxide, records 2 # Reactor [H + ] concentration is 0.68 mol / L; 2 # After the reactor is...

Embodiment 2

[0023] The composition of nickel cobalt hydroxide used in the leaching process is shown in Table 3.

[0024] Table 3 Example 2 nickel hydroxide cobalt composition / %

[0025] Ni co Cu Fe Zn mn Ca Mg Na h 2 o 43.40 0.75 0.018 0.09 0.16 0.83 0.012 1.01 0.016 49.00

[0026] The first step: two-stage leaching. Concrete operation is with embodiment 1,1 # Reactor leaching process solution [H + ] concentration is 0.69mol / L, 2 # Reactor [H + ] concentration is 0.72 mol / L; 3 # The solution in the reaction kettle [H + ] concentration is 0.51 mol / L. Sampling and analysis in the low-level tank of the second leaching solution, the [H of the second-stage leaching solution + ] The concentration was 0.58mol / L, and no chlorine gas was produced in the second-stage leaching process. Measured during leaching 1 # ,2 # 、3 # The temperatures of the reactors were 50°C, 62°C, and 57°C respectively. During the operation, the amount of foam in the...

Embodiment 3

[0031] The composition of nickel cobalt hydroxide used in the leaching process is shown in Table 5.

[0032] Table 5 Example 3 nickel hydroxide cobalt composition / %

[0033] Ni co Cu Fe Zn mn Ca Mg Na h 2 o 44.06 0.82 0.013 0.11 0.13 0.74 0.013 0.99 0.019 52.00

[0034] The first step: two-stage leaching. Concrete operation is with embodiment 1,1 # Reactor leaching process solution [H + ] concentration is 0.35mol / L, 2 # Reactor [H + ] concentration is 0.41 mol / L; 3 # The solution in the reaction kettle [H +] concentration is 0.29 mol / L. Sampling and analysis in the low level tank of the second leaching solution, the [H of the second stage leaching solution + ] The concentration was 0.15mol / L, and no chlorine gas was produced in the second-stage leaching process. Measured during leaching 1 # ,2 # 、3 # The temperatures of the reaction kettles were 56°C, 71°C, and 66°C respectively. During the operation, the amount of foam...

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Abstract

The invention provides a method for producing a nickel chloride solution through leaching nickel hydroxide cobalt with hydrochloric acid. The method comprises the following steps: step one, carrying out two-stage leaching, namely, firstly adding a nickel chloride solution into a reaction kettle, then adding hydrochloric acid and one-stage leaching residue for leaching, always controlling the concentration of [H<+>] of the solution in the reaction kettle to 0.1-0.8mol / L, then filtering the solution by a filter press so as to produce a second-stage leaching liquid and second-stage leaching residue; and step two, carrying out one-stage leaching, namely, adding the second-stage leaching liquid into a one-stage leaching kettle, adding nickel hydroxide cobalt into the one-stage leaching kettle for adjusting the pH value of the solution, after the pH value reaches 3.5-4.0, carrying out filter pressing, so as to produce one-stage leaching liquid and one-stage leaching residue, and eliminating impurities of the one-stage leaching liquid so as to obtain the product nickel chloride solution. The method can effectively prevent generation and overflowing of chlorine in leaching; furthermore, the second-stage leaching residue formed in the leaching process contains little nickel, so that the method can effectively improve the leaching rate of the nickel.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy and relates to a method for producing nickel chloride solution by leaching nickel cobalt hydroxide with hydrochloric acid. Background technique [0002] In the production of nickel chloride products, nickel chloride solution must first be produced. There are many methods for producing nickel chloride solution, including the reaction method of hydrochloric acid and electrolytic nickel, the method of reaction of hydrochloric acid and nickel carbonate, and the extraction of nickel sulfate solution. -The method of hydrochloric acid transformation, the method of chlorine gas leaching of high-sulfonium nickel concentrate, the method of leaching nickel cobalt hydroxide with hydrochloric acid, etc. Among many methods, due to the limitation of resources, the treatment process of nickel cobalt hydroxide obtained from the treatment of laterite nickel ore will gradually show resource advantages....

Claims

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Application Information

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IPC IPC(8): C01G53/09C22B23/00
CPCY02P10/20
Inventor 陈胜维邢晓钟李宝平任伟曹增成于红张国勇王永铸谭卫民时金秋
Owner 金川集团镍盐有限公司
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