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Method for rapidly dissolving nickel oxide, deacidifying nickel soap and removing impurities to produce nickel sulfate solution

A technology of nickel oxide and nickel sulfate, applied in the field of hydrometallurgy, can solve the problems of slow production energy consumption, slowed nickel dissolution rate, affecting the supply of nickel sulfate evaporation and crystallization solution, etc., and achieves the effect of rapid dissolution

Active Publication Date: 2019-08-06
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When nickel oxide produced from laterite ore is dissolved in sulfuric acid, the dissolution rate of nickel slows down as the concentration of sulfuric acid decreases; while in actual production, nickel oxide is used to produce qualified nickel sulfate solution, and the pH value of the solution must be above 3.0. The dissolution time of nickel oxide needs at least 20 hours. Such a slow dissolution rate not only increases the energy consumption of production, but also affects the supply of subsequent nickel sulfate evaporation and crystallization solutions. The impurity in the nickel oxide solution exceeds the standard

Method used

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  • Method for rapidly dissolving nickel oxide, deacidifying nickel soap and removing impurities to produce nickel sulfate solution
  • Method for rapidly dissolving nickel oxide, deacidifying nickel soap and removing impurities to produce nickel sulfate solution
  • Method for rapidly dissolving nickel oxide, deacidifying nickel soap and removing impurities to produce nickel sulfate solution

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Experimental program
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Effect test

Embodiment 1

[0045] 1) Add sulfuric acid with a hydrogen ion concentration of 12mol / L to dissolved nickel oxide for dissolution reaction. The mass ratio of sulfuric acid volume to nickel oxide is 1:1, that is, 500mL of 12mol / L sulfuric acid, 500g of nickel oxide, and the reaction temperature is 90 ℃, reaction time 30min.

[0046](2) Then add water to dilute the nickel oxide solution containing crystals by 3 times and continue the reaction. Control the reaction temperature at 70°C, and the reaction time is 3 hours, and perform solid-liquid separation. After separation, the filtrate is obtained. The hydrogen ion concentration in the filtrate is 1.7mol / L, nickel ion 67.5g / L.

[0047] (3) Sodium soap: use P507 as the extractant, sulfonated kerosene as the diluent, mix sulfonated kerosene and P507 at a volume ratio of 4:1 (sulfonated kerosene volume 4L, P507 volume 1L) to obtain a mixed organic phase, Using liquid caustic soda with a mass fraction of 30% to carry out sodium soap on the mixed ...

Embodiment 2

[0056] 1) Add sulfuric acid with a hydrogen ion concentration of 14mol / L to nickel oxide for dissolution reaction. The mass ratio of sulfuric acid volume to nickel oxide is 1:2, that is, 500mL of 14mol / L sulfuric acid, 1000g of nickel oxide, and the reaction temperature is 95°C , The reaction time is 15min.

[0057] (2) Then add water to dilute the nickel oxide solution containing crystals by 4 times and continue the reaction. Control the reaction temperature at 80°C and the reaction time for 2 hours to perform solid-liquid separation. After separation, the filtrate is obtained. The hydrogen ion concentration in the filtrate is 1.49mol / L, nickel ion 60.5g / L.

[0058] (3) Sodium soap: use P507 as the extractant, sulfonated kerosene as the diluent, mix sulfonated kerosene and P507 at a volume ratio of 3:1 (sulfonated kerosene volume 3L, P507 volume 1L) to obtain a mixed organic phase, Use liquid caustic soda with a mass fraction of 30% to carry out sodium soap on the mixed org...

Embodiment 3

[0067] 1) Add sulfuric acid with a hydrogen ion concentration of 16mol / L to dissolved nickel oxide for dissolution reaction. The mass ratio of sulfuric acid volume to nickel oxide is 1:1.4, that is, 500mL of 16mol / L sulfuric acid, 700g of nickel oxide, and a reaction temperature of 92 ℃, reaction time 20min.

[0068] (2) Then add water to dilute the nickel oxide solution containing crystals by 3.5 times and continue the reaction. Control the reaction temperature at 90°C and the reaction time for 1.5 hours, and perform solid-liquid separation. After separation, the filtrate is obtained. The hydrogen ion concentration in the filtrate is 1.89mol / L, nickel ion 77.8g / L.

[0069] (3) Sodium soap: use P507 as the extractant, sulfonated kerosene as the diluent, mix sulfonated kerosene and P507 at a volume ratio of 3:2 (sulfonated kerosene volume 3L, P507 volume 2L) to obtain a mixed organic phase, Using liquid caustic soda with a mass fraction of 30% to carry out sodium soap on the ...

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Abstract

The invention belongs to the technical field of hydrometallurgy, and discloses a method for rapidly dissolving nickel oxide, deacidifying nickel soap and removing impurities to produce a nickel sulfate solution. The method adopts high concentration sulfuric acid and low concentration sulfuric acid (diluting a reaction solution by adding water) to cooperatively dissolve nickel oxide, so that the purpose of rapidly dissolving the nickel oxide can be achieved; and the time of dissolving the nickel oxide through the method is about 3-4 times shorter than that through traditional low acid. Throughthe adoption of five phases of P507 nickel soap deacidifying, impurities in a nickel oxide dissolving solution can be further purified when surplus acid in a nickel oxide solution is removed through five phases of sodium soap, nickel soap, sodium washing, extraction deacidification and impurity removal, and organic regeneration, and Fe, Zn, Ca, Cu, Mn, Co, Mg and other impurity elements in the dissolving solution can be further purified. The impurity components in the deacidified nickel oxide dissolving solution are extremely low, and evaporation crystallization can be directly performed on the qualified nickel sulfate solution to produce nickel sulfate products.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for rapidly dissolving nickel oxide and deacidifying and removing impurities from nickel soap to produce nickel sulfate solution. Background technique [0002] The raw materials for industrial production of nickel sulfate are mainly nickel sulfide ore, laterite nickel ore, electroplating sludge and crude nickel hydroxide, etc. These raw materials contain high impurities after sulfuric acid is dissolved, and qualified nickel sulfate can only be obtained after multiple impurity removal processes. At the same time, with the rapid development of ternary precursors in the battery industry, nickel-containing raw materials are in short supply, and nickel sulfate production enterprises must find new raw materials. The present invention uses nickel oxide as a raw material to prepare nickel sulfate solution. [0003] When nickel oxide produced from laterite ore is dissolve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/10
CPCC01G53/003C01G53/10
Inventor 赵德董存武沈艳玲孟茂勇魏焘王明
Owner JINCHUAN GROUP LIMITED
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