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Method for decreasing magnesium oxide in nickel sulfide concentrate

A technology of nickel sulfide concentrate and magnesium oxide, which is applied in the direction of improving process efficiency, can solve the problems of restricting mineral processing recovery rate and reducing mineral processing recovery rate, and achieve the effect of improving mineral processing recovery rate and reducing magnesium oxide

Inactive Publication Date: 2013-03-13
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, during the beneficiation process, especially when dealing with high-grade minerals, a relatively high content of magnesia is often mixed into the concentrate. The beneficiation recovery rate is reduced, making it a bottleneck problem restricting the beneficiation recovery rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Treat the nickel concentrate containing 10% MgO; first, stir and mix according to the mass ratio of concentrate to water 1:2, stirring speed: 42r / min, after mixing evenly, according to the mass ratio of concentrate to acid 6:1 Concentrated sulfuric acid with a concentration of 93% was added in the ratio of 93%, and the reaction time was stirred for 3 hours, so that it could be fully reacted, and solid-liquid separation was carried out, and the obtained essence ore contained 2% MgO.

Embodiment 2

[0013] Treat the nickel concentrate containing 10% MgO; first, stir and mix according to the mass ratio of concentrate to water 1:1, stirring speed: 42r / min, after mixing evenly, according to the mass ratio of concentrate to acid 10:1 Concentrated sulfuric acid with a concentration of 93% was added in a proportion of 93%, and the reaction time was stirred for 5 hours, so that it could be fully reacted, and solid-liquid separation was carried out, and the obtained essence ore contained 5% MgO.

Embodiment 3

[0015] Treat the nickel concentrate containing 10% MgO; first, stir and mix according to the mass ratio of concentrate to water 1:3, stirring speed: 42r / min, after mixing evenly, according to the mass ratio of concentrate to acid 4:1 Concentrated sulfuric acid with a concentration of 93% was added in a proportion of 93%, and the reaction time was stirred for 5 hours, so that it could be fully reacted, and solid-liquid separation was carried out, and the obtained essence ore contained 4% MgO.

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Abstract

The invention discloses a method for decreasing magnesium oxide in nickel sulfide concentrate, and relates to a method for treating nickel sulfide concentrate in flash furnace smelting production process. The method is characterized by comprising the following steps of: adding sulfuric acid in the nickel sulfide concentrate to ensure that the magnesium oxide in the concentrate reacts with the sulfuric acid to generate magnesium sulfate, and carrying out solid-liquid separation to detain the magnesium sulfate in the solution so as to be separated and removed from the concentrate. According to the method for decreasing magnesium oxide in the nickel sulfide concentrate, the sulfuric acid is added in the concentrate, the NiS and CuS in the concentrate do not change in the aspect of chemical structure and exist in a solid form, the MgO in the concentrate reacts with the sulfuric acid to generate the magnesium sulfate which is dissolved in water, and during the solid-liquid separation process of the ore pulp, the magnesium sulfate is mostly retained in the solution, so that the separation of the NiS and the CuS from the MgO in copper-nickel sulfide ore is realized and thus the effect of decreasing the magnesium oxide in the nickel sulfide concentrate. According to the method, the magnesium oxide in the concentrate is effectively removed and the ore dressing recovery percentage of the nickel is improved.

Description

technical field [0001] A method for reducing magnesium oxide in nickel sulfide concentrate relates to a treatment method for nickel sulfide concentrate used in flash furnace smelting production process. Background technique [0002] In the flash furnace smelting process, it is required to strictly control the content of magnesium oxide, a key indicator in the raw ore composition. In actual production, during the beneficiation process, especially when dealing with high-grade minerals, a relatively high content of magnesia is often mixed into the concentrate. The beneficiation recovery rate is reduced, making it a bottleneck problem restricting the beneficiation recovery rate. Contents of the invention [0003] The object of the present invention is to provide a method for reducing magnesium oxide in nickel sulfide concentrate that can effectively improve the recovery rate of nickel beneficiation aimed at the deficiencies in the above-mentioned prior art. [0004] The purp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B23/00
CPCY02P10/20
Inventor 刘玉强王少华刘世和杜昊朱慧姚菲唐金
Owner JINCHUAN GROUP LIMITED
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