Process for continuously producing nickel hydroxide by using pickle liquor of nickel laterite ore

A technology of laterite nickel ore and nickel hydroxide, applied in nickel oxide/nickel hydroxide and other directions, can solve the problems of fine nickel hydroxide particles, difficult to control reaction system, low production efficiency, etc., and achieve uniform particle size, low cost, The effect of improving production efficiency

Inactive Publication Date: 2014-05-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly aims at the process of preparing nickel hydroxide by the direct precipitation method in the prior art. Due to the difficulty in controlling the reaction system, the generated nickel hydroxide particles are fine, the sedimentation performance is poor, and filtration is difficult, which directly leads to the defects of low production efficiency. The aim is to provide a high-efficiency, low-cost process for continuously producing nickel hydroxide crystals with large particles and good filtration performance. The process is simple, easy to operate, safe and environmentally friendly

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  • Process for continuously producing nickel hydroxide by using pickle liquor of nickel laterite ore
  • Process for continuously producing nickel hydroxide by using pickle liquor of nickel laterite ore

Examples

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Embodiment 1

[0028]The process of continuous production of nickel hydroxide with laterite nickel ore acid leaching solution is to add 1L of laterite nickel ore acid leaching solution with a nickel ion concentration of 2g / L to the 1# reaction kettle, heat up and stir and keep the temperature in the kettle at 45°C, and then add 1L # Add sodium hydroxide solution (mass concentration: 0.8%) into the reactor at a flow rate of 0.5 L / h to react. When the pH of the reaction system in the 1# reactor is 7.5, add laterite nickel ore acid leaching solution to the 1# reactor at a flow rate of 2.0L / h, and add sodium hydroxide solution at the same time to control the pH of the reaction system to 7.5. 1# Reactor The outflowing slurry is pumped into the 2# reactor to continue the reaction, and the temperature in the 2# reactor is controlled to be 45°C. The reaction slurry flows into the 1# buffer tank through the overflow port of the upper part of the 2# reactor for aging, and the pump into the hydrocyclon...

Embodiment 2

[0030] The process of continuous production of nickel hydroxide with laterite nickel ore acid leaching solution is to add 1L of laterite nickel ore acid leaching solution with a nickel ion concentration of 2g / L to the 1# reaction kettle, heat up and stir and keep the temperature in the kettle at 50°C, and then add 1L # Add sodium hydroxide solution (mass concentration: 0.8%) into the reactor at a flow rate of 0.5 L / h to react. When the pH of the reaction system in the 1# kettle is 7.5, open the laterite nickel ore acid leaching solution and add it to the 1# reaction kettle at a flow rate of 2.0L / h, and at the same time adjust the sodium hydroxide metering pump to control the pH of the reaction solution in the 1# kettle It is 7.5. The slurry flowing out of the 1# reactor is pumped into the 2# reactor to continue the reaction. The temperature in the 2# reactor is controlled at 50°C, and the reaction slurry flows into the 1# through the overflow port in the upper part of the 2# re...

Embodiment 3

[0032] The process of continuous production of nickel hydroxide with laterite nickel ore acid leaching solution is to add 1L of laterite nickel ore acid leaching solution with a nickel ion concentration of 3g / L to 1# reaction kettle, heat up and stir and keep the temperature in the kettle at 45°C, and then add 1L # Add sodium hydroxide solution (mass concentration: 1.2%) to the reaction kettle at a flow rate of 0.5 L / h to react. When the pH of the reaction system in the 1# kettle is 7.5, open the laterite nickel ore acid leaching solution, add it to the 1# reaction kettle at a flow rate of 2.0L / h, and adjust the amount of sodium hydroxide added to make the pH of the reaction solution in the 1# kettle is 7.5. The reaction liquid flows into the 2# reactor with a stirring paddle through the overflow port of the 1# reactor to continue the reaction. The temperature in the 2# reactor is controlled at 45°C, and the reaction liquid flows into the Aging in the 1# buffer tank, pumped i...

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Abstract

The invention discloses a process for continuously producing nickel hydroxide by using pickle liquor of nickel laterite ore. The process comprises the following steps of: cascade reaction in a 1# reaction kettle and a 2# reaction kettle, ageing in a 1# buffering tank, separation by a hydrocyclone and settlement by a settling groove. The nickel hydroxide crystal with the average particle diameter being more than 22mum and good settling separation and filtering performances is prepared from pickle liquor of the nickel laterite ore and sodium hydroxide solution by a direct precipitation method. The process disclosed by the invention has the advantages that the environmental-friendly effect is achieved, the flow is short, the efficiency is high, the cost is low and the continuous production of the nickel hydroxide can be realized.

Description

technical field [0001] The invention relates to a process for continuously producing nickel hydroxide from laterite nickel ore acid leaching solution, and belongs to the field of nickel hydroxide production process. Background technique [0002] Nickel plays an extremely important role in the development of the national economy and is mainly used in industries such as stainless steel, alloy, electroplating, chemical industry and new energy. According to incomplete statistics, about 2 / 3 of the world's nickel is mainly used in stainless steel. [0003] Laterite ore used to be the main nickel resource until the discovery of Sudbury nickel sulfide ore in Canada in the early 20th century, which shifted people's attention from laterite ore to sulfide ore. At present, the world's terrestrial resources with a nickel grade of about 1% are about 140 million tons, of which sulfide ore reserves account for about 30% of terrestrial nickel resources, and laterite nickel ore accounts for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04
Inventor 徐徽李贵刘卫平程俊峰石西昌杨喜云陈亚廖浩然
Owner CENT SOUTH UNIV
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