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Method for stepwise extraction of nickel, cobalt and manganese from nickel-cobalt-manganese polymetallic oxide ore

A technology of polymetallic oxide ore, nickel cobalt manganese, applied in the field of hydrometallurgy

Active Publication Date: 2022-03-08
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct reduction ammonia leaching, or reduction roasting——ammonia leaching, although nickel, cobalt, and copper can be selectively leached, and the separation of nickel, cobalt and copper can be achieved by leaving manganese in the leaching slag, but the ammonia leaching slag needs further smelting to recover manganese

Method used

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  • Method for stepwise extraction of nickel, cobalt and manganese from nickel-cobalt-manganese polymetallic oxide ore
  • Method for stepwise extraction of nickel, cobalt and manganese from nickel-cobalt-manganese polymetallic oxide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Mix 100g of nickel-cobalt-manganese polymetallic oxide ore containing 15.0% of Mn, 0.30% of Co and 0.29% of Ni with 1.5 times the theoretical consumption of coke, add sulfuric acid of 1.0 times the theoretical acid consumption of the ore, at a liquid-solid ratio of 4:1 , Pressurized leaching at 150°C for 1 hour, the conversion rate of manganese into manganese sulfate is 99.8%, and the leaching rate of nickel and cobalt is greater than 99.7%. The leached pulp is transferred to a pressure kettle and subjected to high-temperature sedimentation and separation at 150°C 1 Hours, the underflow and nickel-cobalt-rich leachate are obtained, the nickel-cobalt-rich leachate is used for nickel-cobalt recovery, the underflow is filtered to obtain the filtrate and manganese-rich slag, the filtrate can be returned to the leaching ingredients, and the manganese-rich slag is leached with water at 50 ° C for 30 minutes , and then solid-liquid separation to obtain leaching residue and mang...

Embodiment 2

[0053] Mix 100g of nickel-cobalt-manganese polymetallic oxide ore containing 15.0% of Mn, 0.30% of Co and 0.29% of Ni with 1.5 times the theoretical consumption of coke, add sulfuric acid of 1.0 times the theoretical acid consumption of the ore, at a liquid-solid ratio of 4:1 , Pressurized leaching at 250°C for 1 hour, the conversion rate of manganese into manganese sulfate is 99.9%, and the leaching rate of nickel and cobalt is greater than 99.5%. The leached pulp is transferred to a pressure kettle and subjected to high-temperature sedimentation and separation at 250°C 1 Hours, the underflow and nickel-cobalt-rich leachate are obtained, the nickel-cobalt-rich leachate is used for nickel-cobalt recovery, the underflow is filtered to obtain the filtrate and manganese-rich slag, the filtrate can be returned to the leaching ingredients, and the manganese-rich slag is leached with water at 50 ° C for 30 minutes , and then solid-liquid separation to obtain leaching slag and mangane...

Embodiment 3

[0055] Mix 100g of nickel-cobalt-manganese polymetallic oxide ore containing 15.0% of Mn, 0.30% of Co, and 0.29% of Ni with 1.0 times the theoretical consumption of coke, add sulfuric acid of 1.0 times the theoretical acid consumption of the ore, at a liquid-solid ratio of 4:1 , Pressurized leaching at 250°C for 1 hour, the conversion rate of manganese into manganese sulfate is 98.5%, and the leaching rate of nickel and cobalt is greater than 99.2%. The leached pulp is transferred to a settling autoclave and subjected to high-temperature sedimentation separation at 250°C After 1 hour, the underflow and nickel-cobalt-rich leachate are obtained. The nickel-cobalt-rich leachate is used for nickel-cobalt recovery. The underflow is filtered to obtain the filtrate and manganese-rich slag. The filtrate can be returned to the leaching ingredients, and the manganese-rich slag is washed with water at 50°C , to obtain leaching residue and manganese sulfate solution.

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Abstract

The invention relates to a method for extracting nickel, cobalt and manganese step by step from nickel-cobalt-manganese polymetallic oxide ore by wet method, which belongs to the technical field of hydrometallurgy. The method includes the following steps: (I) mixing the nickel-cobalt-manganese polymetallic oxide ore with a carbonaceous reducing agent, and then carrying out pressurized sulfuric acid leaching to obtain leached pulp; (II) separating the leached pulp from process (I) into solid and liquid to obtain rich Nickel-cobalt leaching solution and manganese-rich slag; (III) washing or leaching the manganese-rich slag in step (II) with water, and then separating solid and liquid to obtain leaching slag and manganese sulfate solution. The present invention reduces high-priced manganese to low-priced manganese by adopting carbon pressurized reduction wet leaching technology, dissociates valuable elements in cobalt-manganese polymetallic oxide ores and leaches them into the solution, and utilizes manganese sulfate to increase with high temperature. The characteristic of high solubility and reduced manganese is suppressed in the leaching slag, and then the manganese-containing leaching slag is leached under normal pressure to realize the separation of manganese and nickel-cobalt polymetallics. The invention has the outstanding advantages of strong raw material adaptability, short process and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a method for extracting nickel, cobalt and manganese step by step through wet leaching of nickel-cobalt-manganese polymetallic oxide ore. Background technique [0002] Nickel-cobalt-manganese polymetallic oxide ores include manganese nodules, cobalt-rich crusts, and cobalt soil ores. Manganese nodules are also called polymetallic nodules or seabed polymetallic nodules, and cobalt-rich crusts are also called ferromanganese crusts or seabed ferromanganese crusts. shells or seabed cobalt crusts. These ores are rich in nickel, cobalt, and even copper, and contain a relatively high content of manganese. They belong to multi-metal resources such as nickel, cobalt, and manganese, and are especially widely distributed on the seabed. [0003] The smelting methods of nickel-cobalt-manganese polymetallic oxide ore are divided into two types: fire method and wet method. Among them, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B23/00C22B47/00
CPCC22B3/08C22B23/043C22B47/00Y02P10/20
Inventor 蒋训雄冯林永汪胜东李达张登高蒋伟赵峰
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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