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Method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation

A copper-nickel sulfide ore and magnesium oxide technology, applied in flotation, solid separation, etc., can solve the problems of concentrate grade decline, smelting process difficulties, gangue minerals are difficult to effectively suppress, etc., and achieve the effect of improving metal recovery rate

Inactive Publication Date: 2015-09-02
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of magnesium-containing gangue minerals enter the concentrate, which not only leads to a decline in the grade of the concentrate, but also brings difficulties to the subsequent smelting process, especially the current advanced flash smelting technology requires that the magnesium oxide content in the copper-nickel mixed concentrate must be controlled Below 6.5%
In view of this, domestic and foreign colleges and universities, scientific research institutes and factory and mine engineers and technicians have done a lot of research work and made great progress. The test results of magnesium-containing gangue minerals mainly serpentine are good, but for raw ore The magnesium oxide content is high, and the activated gangue minerals such as serpentine and chlorite are difficult to effectively inhibit

Method used

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  • Method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation
  • Method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation
  • Method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation

Examples

Experimental program
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Effect test

example 1

[0022] Example 1 : The low-grade nickel ore was collected from the Longshou mining area in Jinchuan, Gansu, with a Ni content of 0.74% and a Cu content of about 0.58%, which is a lean ore. First, grind the raw ore until the particle size is -0.074mm and the content is 88%, then put the ore slurry into the flotation stirring tank, add complexing agent citric acid to the stirring tank, the dosage is 1000g / t, and stir for 5 minutes; then Add 500g / t of sodium hexametaphosphate and 200g / t of gull gum combined inhibitor to the stirring tank, stir for 2 minutes; add a certain amount of sodium carbonate, adjust the pH value of the pulp to about 9.5; finally add the collector butyl Xanthate 50g / t, butylamine black medicine 50g / t, laboratory closed-circuit process test, the test results are shown in Table 1.

[0023] Table 1

[0024]

example 2

[0026] The original nickel ore was collected from the Longyi mining area in Jinchuan, Gansu, with a Ni content of 1.29% and a Cu content of 0.87%. First, grind the ore until the particle size is -0.074mm and the content is 87.58%, then put the ore pulp into the flotation stirring tank, add complexing agent EDTA to the stirring tank, the dosage is 1500g / t, and stir for 5 minutes; Use 300g / t sodium hexametaphosphate and 150g / t chitosan combined inhibitor in the stirring tank, stir for 2 minutes; add a certain amount of sodium carbonate, adjust the pH value of the pulp to about 9.5; finally add the collector butyl yellow Drug 60g / t, butylamine black drug 60 / t, laboratory closed-circuit process test, the test results are shown in Table 2.

[0027] Table 2

[0028]

example 3

[0030] The original nickel ore was collected from the Longyi mining area in Jinchuan, Gansu, with a Ni content of 1.29% and a Cu content of 0.87%. First, grind the raw ore until the particle size is -0.074mm and the content is 88.67%, then put the ore slurry into the flotation stirring tank, add complexing agent oxalic acid to the stirring tank, the dosage is 2000g / t, and stir for 5 minutes; Use 400g / t sodium hexametaphosphate and 200g / t chitosan combined inhibitor in the stirring tank, stir for 2 minutes; add a certain amount of sodium carbonate, adjust the pH value of the pulp to about 9.5; finally add the collector butyl yellow Drug 60g / t, butylamine black drug 60 / t, laboratory closed-circuit process test, the test results are shown in Table 3.

[0031] table 3

[0032]

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Abstract

The invention relates to a method for reducing concentrate magnesium oxide content in copper-nickel sulfide ore flotation. The method includes steps of firstly adding complexing agent oxalic acid, citric acid, tartaric acid, quadrol and EDTA (ethylene diamine tetraacetic acid), cleaning active ions of copper and nickel on the surface of magnesium-contained gangue mineral such as serpentine, removing flotation activity of sulfide ore collector such as xanthogenate, and adding composition agent to suppress gangue mineral. Ore pulp is treated by complexing agent, the flotation environment is improved, and floatability difference between copper-nickel sulfide mineral and magnesium-contained gangue mineral is increased. By combined inhibitor, serpentine and talc gangue mineral are suppressed, and magnesium-reducing effect is better; nickel recovery rate is increased to some extent as compared with that of actual production. Meanwhile, content of magnesium oxide in concentrate is reduced, and melting cost is lowered.

Description

technical field [0001] The invention relates to the field of flotation of non-ferrous metal sulfide ores, in particular to a method for reducing the magnesium oxide content of concentrate in the flotation of copper-nickel sulfide ores. Background technique [0002] More than 80% of my country's nickel ore resources are low-grade copper-nickel sulfide ores rich in magnesium silicate gangue minerals. Flotation is the main method for sorting copper-nickel sulfide ores, but it is inevitable to A large amount of metal ions such as copper and nickel ions are produced, because these metal ions (especially Cu 2+ 、Ni 2+ ) activation, these magnesium-containing silicate gangue minerals such as serpentine and chlorite have good buoyancy, and enter the copper-nickel mixed concentrate with foam. A large amount of magnesium-containing gangue minerals enter the concentrate, which not only leads to a decline in the grade of the concentrate, but also brings difficulties to the subsequent sm...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03B1/04B03D1/016B03D1/018B03D101/06
Inventor 张成强黄俊玮雷晴宇李洪潮
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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