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Flotation method for reducing content of magnesium oxide in copper-nickel concentrate

A magnesia and concentrate technology, used in flotation, solid separation and other directions, can solve the problems of reduced fluidity, furnace leakage, reduced smelting recovery rate, etc., to achieve the effect of reducing content and enhancing efficiency

Active Publication Date: 2013-08-21
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The copper-nickel concentrate obtained by flotation contains magnesium oxide. When the copper-nickel concentrate is smelted in the nickel flash furnace, the melting temperature and viscosity of the slag As the content of magnesium oxide in copper-nickel concentrate increases, it will lead to an increase in the melting point in the furnace, a decrease in fluidity, and affect the safe operation of the furnace, which will cause leakage of the furnace body, shorten the life of the furnace, and increase potential safety hazards
At the same time, since the melting point of nickel is 1453 °C and the melting point of magnesium oxide is above 1600 °C, too high content of magnesium oxide in copper-nickel concentrate will not only increase the smelting cost, but also cause the slag phase viscosity to be too high, resulting in nodules in the smelting furnace , the slag phase separation is difficult, reducing the smelting recovery rate
[0003] At present, copper-nickel sulfide ore is generally recovered by flotation to obtain copper-nickel concentrate, and there are problems in the process of flotation to improve the grade of concentrate and recover Ratio and Reduction of Magnesium Oxide Content in Copper-Nickel Concentrate

Method used

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  • Flotation method for reducing content of magnesium oxide in copper-nickel concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Use the existing grinding device to grind the raw ore for one stage, and add ammonium sulfate at a rate of 0.683kg of ammonium sulfate per ton of raw ore, and add ammonium sulfate during the one-stage grinding process. The percentage reaches 65% of the total weight of the pulp, and when the weight percentage concentration of the pulp is 28%, a stage of rough separation is carried out to obtain a stage of rough separation concentrate and a stage of rough separation tailings; water is added to the stage of rough separation concentrate, and the formed The concentration of the weight percentage of the pulp is 15%, and it is selected once for one stage, and the aeration volume during the selection is 0.4m 3 / m 2Min, to obtain a section of primary concentrate concentrate and a section of primary concentrate tailings; perform fine sweeping on a section of primary concentrate tailings to obtain fine sweep concentrate and fine sweep tailings; combine a section of primary concent...

Embodiment 2

[0040] Use the existing grinding device to grind the raw ore for one stage, and add 1kg of ammonium sulfate per ton of raw ore, add ammonium sulfate during the one-stage grinding process, when the weight percentage of the ore particles in the grinding slurry with a particle size of ≤200 mesh When it reaches 70% of the total weight of the pulp and the concentration of the pulp is 31%, a stage of roughing is carried out to obtain a stage of roughing concentrate and a stage of roughing tailings; water is added to the stage of roughing concentrate and the formed pulp is controlled The weight percentage concentration is 23%, and a period of one-time selection is carried out, and the air volume during selection is 0.5m 3 / m 2 Min, to obtain a section of primary concentrate concentrate and a section of primary concentrate tailings; perform fine sweeping on a section of primary concentrate tailings to obtain fine sweep concentrate and fine sweep tailings; combine a section of primary ...

Embodiment 3

[0043] Use the existing grinding device to grind the raw ore for one stage, and add ammonium sulfate at a rate of 0.8415kg ammonium sulfate per ton of raw ore, and add ammonium sulfate during the one-stage grinding process. The percentage reaches 67.5% of the total weight of the pulp, and when the weight percentage concentration of the pulp is 25%, a stage of roughing is carried out to obtain a stage of rough concentrate and a stage of rough tailings; water is added to the stage of rough concentrate and the formed The concentration of the weight percentage of the pulp is 19%, and it is selected once for one stage, and the aeration volume during the selection is 0.45m 3 / m 2 Min, to obtain a section of primary concentrate concentrate and a section of primary concentrate tailings; perform fine sweeping on a section of primary concentrate tailings to obtain fine sweep concentrate and fine sweep tailings; combine a section of primary concentrate concentrate and The first stage of...

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Abstract

The invention discloses a flotation method for reducing the content of magnesium oxide in copper-nickel concentrate. The flotation method comprises the following steps: raw ore is ground at the first stage, primary roughing concentrate is treated through first-stage once cleaning, and first-stage cleaning tailings are scavenged; first-stage once cleaning concentrate and scavenged concentrate are treated through first-stage twice cleaning, and first-stage twice cleaning tailings are treated through first-stage once cleaning; first-stage twice cleaning concentrate is dewatered; first-stage roughing tailings and scavenged tailings are ground at the second stage, second-stage roughing tailings are treated through once scavenging, second-stage roughing concentrate is treated through second-stage once cleaning, and first-stage scavenged concentrate and second-stage once cleaning tailings are ground at the second stage; once scavenged tailings are treated through twice scavenging, and twice scavenged concentrate is treated through second-stage roughing; second-stage once cleaning tailings are treated through second-stage twice cleaning; second-stage twice cleaning tailings are treated through second-stage once cleaning; and second-stage twice cleaning concentrate is treated through second-stage third-time cleaning, second-stage third-time cleaning tailings are treated through second-stage twice cleaning, and the second-stage third-time cleaning tailings are dewatered. The flotation method adopts the mode of staged grinding and staged cleaning, and considers both the nickel grade and the nickel recovery rate in the copper-nickel concentrate, and provides acceptable material for flash smelting.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and relates to a method for controlling magnesium oxide in copper-nickel ore dressing and beneficiation operations, in particular to a flotation method for reducing the content of magnesium oxide in copper-nickel ore concentrate. Background technique [0002] The copper-nickel concentrate obtained by flotation contains magnesium oxide. When the copper-nickel concentrate is smelted in nickel flash furnace smelting, the melting temperature and viscosity of the slag increase with the increase of magnesium oxide content in the copper-nickel concentrate, resulting in The melting point in the furnace rises, the fluidity decreases, and it affects the safe operation of the furnace, which causes leakage of the furnace body, shortens the life of the furnace, and increases potential safety hazards. At the same time, since the melting point of nickel is 1453 °C and the melting point of magnesium oxide i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/04
Inventor 崔忠远王玛斗陈杰
Owner JINCHUAN GROUP LIMITED
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