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Method for recovering nickel, cobalt, iron, manganese and magnesium from oxidized nickel ore

A technology of nickel oxide ore and nickel-cobalt-iron, which is applied in the field of hydrometallurgy, can solve the problems of nickel and cobalt loss, and achieve environmental friendliness, economic benefits and strong environmental protection

Active Publication Date: 2011-05-04
河南永通不锈钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the first step of the process, that is, during the pre-neutralization and removal of iron and aluminum with a neutralizing agent, due to adsorption co-precipitation with iron and aluminum, and excessive local alkalinity, precious nickel and a large loss of cobalt

Method used

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  • Method for recovering nickel, cobalt, iron, manganese and magnesium from oxidized nickel ore
  • Method for recovering nickel, cobalt, iron, manganese and magnesium from oxidized nickel ore

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The composition of nickel oxide ore used (% by weight): Ni 1.4, Fe 14, Co 0.08, MgO18.5, SiO 2 35.7, Mn 1.2, CaO0.3, Al 2 o 3 6.08, Cr1.02.

[0034] Leaching conditions: material particle size -74μm accounted for 70%, sulfuric acid dosage 1.2 times the theoretical amount, leaching temperature 85°C, leaching time 60min, liquid-solid ratio 3:1, stirring linear speed 4.5m / s. Leaching rate: nickel 96%, cobalt 94%, magnesium 95%, iron 55%, manganese 75%.

[0035] The content of main elements in sulfuric acid leaching solution of nickel oxide ore is as follows (g / L): Fe 25, Ni 4.5, Co 0.25, Mg 35, Mn 3, Al 1.5, pH=1.

[0036] Cobalt-manganese oxidation co-precipitation process conditions: add sodium chlorate twice the theoretical amount of cobalt and manganese for oxidation precipitation, oxidation precipitation temperature 60 ° C, oxidation precipitation time 60 minutes. Precipitation rate: cobalt 82%, manganese 96%. The weight percent content of the obtained cobalt-man...

Embodiment 2

[0040] The composition of nickel oxide ore used (% by weight): Ni 1.6, Fe 16Co 0.07, MgO15.8, SiO 241.2, Mn1.1, CaO0.2, Al 2 o 3 5.28, Cr0.92.

[0041] Leaching conditions: material particle size -74μm accounted for 70%, sulfuric acid dosage 1.25 times the theoretical amount, leaching temperature 88°C, leaching time 60min, liquid-solid ratio 3:1, stirring linear speed 5m / s. Leaching rate: nickel 98%, cobalt 96%, magnesium 94%, iron 54%.

[0042] The content of main elements in sulfuric acid leaching solution of nickel oxide ore is as follows (g / L): Fe 28, Ni 5.2, Co 0.22, Mg 30, Mn 2.93, Al 1, pH=0.5.

[0043] Cobalt-manganese oxidation co-precipitation process conditions: add ammonium persulfate three times the theoretical amount of cobalt and manganese for oxidation precipitation, oxidation precipitation temperature 50 ° C, oxidation precipitation time 90 minutes. Precipitation rate: cobalt 88%, manganese 98%. The weight percent content of the obtained cobalt-manganese ...

Embodiment 3

[0047] The composition of nickel oxide ore used (% by weight): Ni 1.8, Fe 13, Co 0.08, MgO16.5, SiO 2 38.2, Mn1.8, CaO0.32, Al 2 o 3 4.57, Cr1.15.

[0048] Leaching conditions: material particle size -74μm accounted for 60%, sulfuric acid dosage 1.25 times the theoretical amount, leaching temperature 90°C, leaching time 60min, liquid-solid ratio 3:1, stirring linear speed 5m / s. Leaching rate: nickel 98.5%, cobalt 96.5%, magnesium 95.5%, iron 56%.

[0049] The content of main elements in sulfuric acid leaching solution of nickel oxide ore is as follows (g / L): Fe 24, Ni 5.9, Co 0.26, Mg 31.5, Mn 4, Al 1.2, pH=0.6.

[0050] Cobalt-manganese oxidation co-precipitation process conditions: add sodium hypochlorite three times the theoretical amount of cobalt and manganese for oxidation precipitation, oxidation precipitation temperature 40 ° C, oxidation precipitation time 60 minutes. Precipitation rate: cobalt 80%, manganese 92%. The weight percent content of the obtained cobalt...

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Abstract

The invention provides a method for recovering nickel, cobalt, iron, manganese and magnesium from oxidized nickel ore, comprising the following steps: preparing raw material oxidized nickel ore; preparing the sulfuric acid leaching solution of the oxidized nickel ore; selectively recovering cobalt and magnesium; neutralizing and coprecipitating nickel and iron; and condensing and crystallizing the filtrate. By the method, nickel, cobalt, iron, manganese and magnesium can be recovered from the oxidized nickel ore, and the method is a process with high comprehensive utilization rate of resource, low energy consumption and environmental protection, and is simple to implement.

Description

technical field [0001] The invention relates to hydrometallurgy, in particular to a method for recovering nickel-cobalt-iron-manganese-magnesium from nickel oxide ore. Background technique [0002] Nickel oxide ore is a symbiotic mineral containing a variety of metal elements, usually containing valuable metal elements such as nickel, cobalt, iron, manganese, magnesium, and a large amount of silica, alumina, etc. [0003] In the traditional sulfuric acid wet extraction technology of nickel oxide ore, it includes sulfuric acid pressure leaching of pre-crushed and ball-milled nickel oxide ore powder, sulfuric acid atmospheric pressure leaching, and sulfuric acid heap leaching of raw ore. Generally speaking, the leaching solution used in sulfuric acid wet extraction of nickel oxide ore usually contains 5-35g / L iron, 0.5-10g / L nickel, 0.1-1g / L cobalt, 0.5-10g / L manganese and Aluminum, and 5-45g / L magnesium. [0004] In the above-mentioned traditional sulfuric acid wet extracti...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/46C22B23/00C22B47/00C22B26/22
CPCY02P10/20
Inventor 董书通王鹏辉王成彦赵平
Owner 河南永通不锈钢制品有限公司
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