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New method for extracting nickel from enriched ore of nickel sulfide

A technology of nickel sulfide and a new method, which is applied in the field of reacting nickel sulfide and pyrolusite to generate nickel sulfate and manganese sulfate, can solve problems such as pollution and corrosion of equipment environment, and achieve the goal of overcoming lengthy process, high nickel recovery rate and significant technological progress Effect

Inactive Publication Date: 2007-07-25
KUNMING INST OF PRECIOUS METALS
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AI Technical Summary

Problems solved by technology

[0003] Although the nitric-sulfur mixed acid leaching method has a high leaching rate, nitrogen dioxide gas will inevitably be generated due to the use of nitric acid, which will corrode equipment and cause environmental pollution
Chlorine leaching will also corrode equipment and cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Mix 500g pyrolusite and 100g nickel sulfide concentrate, add 1.6 liters of sulfuric acid with a concentration of 10%, the temperature is 50°C, the stirring speed is adjusted to 100 rpm, and the reaction is carried out for 2 hours. The leaching rate reaches 75%.

Embodiment 2

[0011] Mix 500g pyrolusite and 100g nickel sulfide concentrate, add 1.6 liters of sulfuric acid with a concentration of 15%, the temperature is 80°C, the stirring speed is adjusted to 200 rpm, and the reaction is carried out for 1.5 hours. The leaching rate reaches 80%.

Embodiment 3

[0013] Mix 500g pyrolusite and 150g nickel sulfide concentrate, add 1.6 liters of sulfuric acid with a concentration of 12%, the temperature is 70°C, the stirring speed is adjusted to 150 rpm, and the reaction is carried out for 1.5 hours. The leaching rate reaches 72%.

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PUM

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Abstract

This invention discloses a novel method for extracting nickel from nickel sulfide concentrate. The method overcomes the problems of long extraction time, low nickel recovery rate and serious pollution faced by the traditional methods. The method comprises: (1) placing nickel sulfide concentrate and pyrolusite at a certain weight ratio into a reactor; (2) adding certain volume and concentration of H2SO4 solution at a certain temperature, and reacting. Nickel sulfide concentrate is leached to form nickel sulfate, and manganese dioxide is leached to form manganese sulfate. The method has such advantages as short reaction time and high nickel recovery rate. The method can choose nickel sulfide concentrate and pyrolusite at different weight ratios, and adopt different parameters and temperatures to realize multiple reactions.

Description

technical field [0001] The invention relates to a method for extracting nickel from nickel sulfide concentrate, in particular to the reaction of nickel sulfide and pyrolusite to generate nickel sulfate and manganese sulfate. Background technique [0002] At present, the methods for extracting nickel from nickel sulfide are mainly divided into two categories: fire method and wet method. The traditional pyrometallurgy of nickel sulfide concentrate not only consumes a lot of energy, but also produces a large amount of sulfur dioxide gas, which will cause environmental pollution if not handled properly. Wet methods mainly include nitric acid mixed acid leaching method and chlorine gas leaching method. [0003] Although the nitric-sulfur mixed acid leaching method has a high leaching rate, nitrogen dioxide gas will inevitably be generated due to the use of nitric acid, which will corrode equipment and cause environmental pollution. Chlorine leaching also corrodes equipment and ...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B3/08
Inventor 汪云华关晓伟范兴祥吴晓峰顾华祥赵家春
Owner KUNMING INST OF PRECIOUS METALS
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