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Method for quickly leaching cobalt nickel hydroxide by using sulfuric acid system

A nickel-cobalt hydroxide and sulfuric acid system technology, applied in the field of non-ferrous hydrometallurgy, can solve the problems of rising raw material price, long process flow, high production cost and high profit margin, etc. Yield-enhancing effect

Pending Publication Date: 2021-03-26
金川集团镍盐有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the rapid development of the battery industry, domestic manufacturers of nickel-cobalt sulfate have become increasingly competitive. The cobalt element in nickel-cobalt hydroxide has begun to be priced, and the price of raw materials has increased. The price of nickel-cobalt sulfate products has decreased, resulting in profit margins for nickel-cobalt sulfate products. significantly reduced
In the original treatment process of nickel hydroxide and cobalt, sodium sulfite was added during the leaching process in order to promote the leaching of cobalt. This measure not only introduces a large amount of sodium ions into the leaching solution, but also must increase the sodium removal process in the subsequent leaching solution removal process. This process is relatively Long, the production cost is higher than the profit margin of nickel sulfate and cobalt products, in order to reduce the production cost, it is necessary to adopt a new method for nickel hydroxide cobalt leaching

Method used

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  • Method for quickly leaching cobalt nickel hydroxide by using sulfuric acid system
  • Method for quickly leaching cobalt nickel hydroxide by using sulfuric acid system
  • Method for quickly leaching cobalt nickel hydroxide by using sulfuric acid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use 3L of tap water to wash 1 kg of crude nickel cobalt hydroxide once. The washing temperature is 50°C, the washing time is 0.5h, and the stirring is turned on during the washing process. The components contained in the crude nickel cobalt hydroxide and their mass percentages are: Ni 42.27%, Co 2.78%, the sum of Cu, Mn, Zn, Fe and other impurities is 9.18%, Na 0.061%. After washing, suck and filter to obtain the washed crude nickel cobalt hydroxide.

[0027] 0.6 kg of crude nickel cobalt hydroxide after washing was dissolved in 0.2 L of concentrated sulfuric acid for 20 min, and stirring was started to obtain the dissolved reaction material. Add water to the dissolved reaction material to dilute to 1.4L, the dilution temperature is 60°C, and the dilution time is 20min. After dilution, solid-liquid separation is carried out to obtain nickel-cobalt hydroxide solution and low-nickel-cobalt solution slag.

[0028] Add 30g of additive sulfur to the nickel-cobalt hydroxide ...

Embodiment 2

[0032] Use 2L of tap water to wash 1.0kg of crude nickel-cobalt hydroxide once. The washing temperature is 55°C, the washing time is 1h, and the stirring is turned on during the washing process. The components and mass percentages of the crude nickel-cobalt hydroxide are: Ni 37.38%, Co1.32%, the sum of Cu, Mn, Zn, Fe and other impurities is 6.63%, Na 0.043%. After washing, suck and filter to obtain the washed crude nickel cobalt hydroxide.

[0033] Dissolve 0.2 kg of crude nickel cobalt hydroxide with 0.2 L of concentrated sulfuric acid for 30 min after washing, and start stirring to obtain the dissolved reaction material. Add water to the dissolved reaction material to dilute to 1.6L, the dilution temperature is 70°C, and the dilution time is 30min. After dilution, solid-liquid separation is carried out to obtain nickel-cobalt hydroxide solution and low-nickel-cobalt solution slag. The components and mass percentages contained in the low-nickel-cobalt dissolved slag are show...

Embodiment 3

[0040] Use 1L of tap water to wash 1 kg of crude nickel-cobalt hydroxide once, the washing temperature is 60°C, the washing time is 0.5h, and the stirring is turned on during the washing process. The components and mass percentages contained in the crude nickel-cobalt hydroxide are: Ni 31.03%, Co 3.54%, Na 0.0093%, the sum of copper, manganese, zinc, iron and other impurities is 5.01%. After washing, suck and filter to obtain the washed crude nickel cobalt hydroxide.

[0041] 0.4 kg of crude nickel cobalt hydroxide after washing was dissolved in 0.1 L of concentrated sulfuric acid for 25 min, and stirring was started to obtain the dissolved reaction material. Add water to the dissolved reaction material to dilute to 0.7L, the dilution temperature is 80°C, and the dilution time is 25min. After dilution, solid-liquid separation is carried out to obtain nickel-cobalt hydroxide solution and low-nickel-cobalt solution slag. The components contained in the low-nickel-cobalt dissolv...

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Abstract

The invention discloses a method for quickly leaching cobalt nickel hydroxide by using a sulfuric acid system. The method comprises the following steps: washing crude cobalt nickel hydroxide with water, carrying out solid-liquid separation, dissolving the washed crude cobalt nickel hydroxide with concentrated sulfuric acid to obtain a dissolved reaction material, adding water into the dissolved reaction material to dilute, carrying out solid-liquid separation to obtain a cobalt nickel hydroxide solution and low-cobalt nickel dissolution slag, adding sulfur into the cobalt nickel hydroxide solution, adding the washed crude cobalt nickel hydroxide into the cobalt nickel hydroxide solution added with the sulfur until the pH value of the cobalt nickel hydroxide solution added with the sulfur is 4.0-4.5, and carrying out solid-liquid separation to obtain a low-sodium high-nickel leaching solution and cobalt nickel hydroxide dissolution slag. According to the method, the leaching rate of cobalt in the cobalt nickel hydroxide is increased, and no sodium ion is additionally introduced for leaching; and the yield of nickel can be further increased by dissolving the cobalt nickel hydroxide with concentrated sulfuric acid, meanwhile, the slag type of leaching slag can be changed by adding sulfur powder, and filter pressing is facilitated.

Description

technical field [0001] The invention belongs to the technical field of nonferrous hydrometallurgy, and in particular relates to a rapid leaching method of nickel hydroxide, cobalt and sulfuric acid system. Background technique [0002] In recent years, with the rapid development of the battery industry, domestic manufacturers of nickel-cobalt sulfate have become increasingly competitive. The cobalt element in nickel-cobalt hydroxide has begun to be priced, and the price of raw materials has increased. The price of nickel-cobalt sulfate products has decreased, resulting in profit margins for nickel-cobalt sulfate products. significantly reduced. In the original treatment process of nickel hydroxide and cobalt, sodium sulfite was added during the leaching process in order to promote the leaching of cobalt. This measure not only introduces a large amount of sodium ions into the leaching solution, but also must increase the sodium removal process in the subsequent leaching solut...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/08C22B3/46
CPCC22B23/043C22B23/0469
Inventor 董存武沈艳玲龚继宝麻在生明键伟
Owner 金川集团镍盐有限公司
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