A method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and atmospheric pressure

A nickel sulfide concentrate, low temperature and normal pressure technology, applied in the field of nickel sulfide concentrate extraction nickel, can solve the problems of environmental pollution, high energy consumption, long recovery and treatment process, etc., and achieves low equipment investment, good selectivity, and resource utilization. Take advantage of the reduced effect

Active Publication Date: 2020-07-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology produces a large amount of hydrogen sulfide gas during the roasting process, which will pollute the environment. In addition, the burning process consumes a lot of energy and the recycling process is relatively long.

Method used

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  • A method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and atmospheric pressure
  • A method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and atmospheric pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 The flow shown is a method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and normal pressure, and the method includes the following steps:

[0029] (1) The nickel sulfide ore used in the experiment is nickel sulfide concentrate after flotation, and its composition is shown in Table 1.1. The nickel sulfide concentrate and balls are mixed according to the ball-to-material ratio of 5:1g / g, and then placed in a high-energy ball mill for mechanical activation. The ball mill speed is 1000rpm, and the ball milling time is 15min. After ball milling, the balls are separated to obtain pre-activated vulcanization. nickel concentrate;

[0030] Table 1.1 Element analysis of nickel sulfide concentrate

[0031]

[0032] (2) Add the nickel sulfide concentrate obtained in step (1) into 2mol / L ammonium sulfate aqueous solution, at a reaction temperature of 100°C, a liquid-solid ratio of 3:1L / g, a rotating speed of 600rpm...

Embodiment 2

[0034] Such as figure 1 The flow shown is a method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and normal pressure, and the method includes the following steps:

[0035] (1) The nickel sulfide ore used in the experiment is nickel sulfide concentrate after flotation, and its composition is shown in Table 1.1. The nickel sulfide concentrate and balls are mixed according to the ball-to-material ratio of 40:1g / g, and then placed in a high-energy ball mill for mechanical activation. The ball mill speed is 200rpm, and the ball milling time is 240min. After the ball milling, the balls are separated to obtain pre-activated vulcanization. nickel concentrate;

[0036] (2) Add the nickel sulfide concentrate obtained in step (1) into the potassium sulfate solution of 0.5mol / L sulfuric acid and 1mol / L, the reaction temperature is 100°C, the liquid-solid ratio is 3:1L / g, and the rotating speed is 600rpm, air aeration flow rate of 1kg activat...

Embodiment 3

[0038] Such as figure 1 The flow shown is a method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and normal pressure, and the method includes the following steps:

[0039] (1) The nickel sulfide ore used in the experiment is nickel sulfide concentrate after flotation, and its composition is shown in Table 1.1. The nickel sulfide concentrate and balls are mixed according to the ball-to-material ratio of 5:1g / g, and then placed in a high-energy ball mill for mechanical activation. The ball mill speed is 1000rpm, and the ball milling time is 15min. After ball milling, the balls are separated to obtain pre-activated vulcanization. nickel concentrate;

[0040](2) the nickel sulfide concentrate that step (1) obtains is joined in 0.5mol / L nitric acid solution, is 100 ℃ at reaction temperature, and liquid-solid ratio is 100:1L / g, and rotating speed is 100rpm, and ozone aeration flow rate is Under the condition of 0.05L / min, the microbubb...

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Abstract

The invention provides a method for selectively extracting valuable metal in nickel sulfide concentrate at low temperature and normal pressure. The method comprises the steps that 1, mechanical activation is carried out, particularly, the nickel sulfide concentrate is placed in a high-energy ball mill for mechanical activation, reaction activity of sulphur in the nickel sulfide is improved, and activated nickel sulfide concentrate is obtained after activation is finished; 2, selective leaching is carried out, particularly, the activated nickel sulfide concentrate obtained in the step 1 is mixed with a water solution containing an additive, and efficient selective leaching of Ni, Co and Cu elements is achieved by the method of introducing tiny oxidized gas bubbles to adjust the reaction environment of activated nickel sulfide mine particle micro areas and adjust and control the oxidized reduction potential of a body solution. Iron enters an iron-rich slag phase in the mode of oxide. Bymeans of the method, valuable metal Ni, Co and Cu in the nickel sulfide concentrate can be efficiently extracted, the extraction rate of valuable metal is larger than 90%, and the selectivity is high.

Description

technical field [0001] The invention relates to a method for extracting nickel from nickel sulfide concentrate, in particular to a method for selectively extracting valuable metals in nickel sulfide concentrate at low temperature and normal pressure. Background technique [0002] Nickel plays an important role in the national economy, social development, national defense industry construction, and science and technology. It is an indispensable basic material and one of the important strategic materials. It is widely used in metallurgy, chemical industry, machinery manufacturing, construction, new materials and other fields. It is mainly used in alloys, stainless steel, electroplating, batteries, catalysts, etc. With the rapid economic development, the demand and output of nickel continue to increase. In my country, nickel sulfide ore reserves are limited, the grade is low, most of them are road mining, and the cost of mining and smelting is high. Finding and rationally explo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/06C22B1/00C22B23/00C22B15/00
CPCY02P10/20
Inventor 孙峙郑晓洪曹宏斌王中行张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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