Beneficiation method of low-grade copper-nickel sulfide ore

A technology for copper-nickel sulfide ore and beneficiation method, which is applied in chemical instruments and methods, flotation, wet separation, etc., can solve the problems of reducing the recovery rate of copper-nickel minerals, the effect of floating of copper-nickel minerals, and the number of additions, etc. Excellent hydrophobicity and adhesion, promoting mineral floatation and reducing dosage

Active Publication Date: 2020-04-10
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the inhibitors added by this method can inhibit the gangue minerals, the number of additions is relatively large, and the overall addition amount is relatively large, which will affect the floating of copper-nickel minerals, so that part of the copper-nickel minerals will float with the gangue. Minerals enter the tailings, reducing the recovery rate of copper nickel minerals

Method used

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  • Beneficiation method of low-grade copper-nickel sulfide ore
  • Beneficiation method of low-grade copper-nickel sulfide ore
  • Beneficiation method of low-grade copper-nickel sulfide ore

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Experimental program
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preparation example Construction

[0042] The preparation method of the superhydrophobic polyurethane nanoparticles comprises the following steps:

[0043] (1) Add toluene diisocyanate and catalyst dibutyltin dilaurate to polypropylene glycol, and react at 80°C for 1 hour, then add chain extender hydroxy silicone oil, and continue to react for 2 hours to prepare organosilicon modified polyurethane;

[0044] (2) The nano-SiO 2 and the organosilicon-modified polyurethane were respectively placed in the solvent ethyl acetate, and after ultrasonic dispersion for 1 h, the nano-SiO 2 The dispersion liquid and the polyurethane dispersion liquid are uniformly mixed, and then ultrasonically dispersed for 0.5 h to obtain super-hydrophobic polyurethane nanoparticles.

[0045] In step S4, the addition amount of the collector in the first-stage cleaning is 40 g / t, the addition amount of the collector in the first-stage cleaning is 30 g / t, and the inhibitor is added in an amount of 30 g / t. The amount is 50g / t.

[0046] In...

Embodiment 1

[0049] The present embodiment provides a kind of beneficiation method of low-grade copper-nickel sulfide ore, comprising the following steps:

[0050] S1. Perform primary grinding on the raw ore, so that the content of particles with a fineness of -74 μm after grinding is greater than 65%, and add water to adjust the slurry to a slurry concentration of 30%, and then add 500 g / t of sodium carbonate to the obtained slurry. As a modifier, stir for 3 minutes to adjust the slurry;

[0051] S2, add the foaming agent of 13g / t in the ore pulp obtained in step S1 to carry out desliming, and the foaming agent is a mixture of terpineol oil and dodecylamine, wherein the mass ratio of terpineol oil and dodecylamine is 1 :2;

[0052] S3. Add 80g / t copper sulfate as activator to the deslimed pulp, add 70g / t superhydrophobic polyurethane nanoparticles as collector after stirring for 3min, add 100g / t carboxymethyl carboxymethyl after stirring for 3min Sodium cellulose is used as an inhibitor...

Embodiment 2～5 and comparative example 1

[0064] Embodiments 2 to 5 and Comparative Example 1 respectively provide a kind of beneficiation method of low-grade copper-nickel sulfide ore. Compared with Embodiment 1, the difference of Embodiments 2 to 5 is that the amount of foaming agent in step S2 is changed. The mass ratio of terpineol oil and dodecylamine in the addition amount or the foaming agent; the difference of Comparative Example 1 is that the foaming agent used in step S2 only contains terpineol oil; Examples 2 to 5 and Comparative Example 1 correspond to The relevant parameters are shown in Table 2.

[0065] Table 2 Relevant parameters in Examples 2 to 5 and Comparative Example 1

[0066] Example Additive amount of foaming agent (g / t) Mass ratio of terpineol oil and dodecylamine Example 2 10 1:2 Example 3 15 1:2 Example 4 13 1:3 Example 5 13 1:1 Comparative Example 1 13 1:0

[0067] The minerals obtained by the separation of Examples 2 to 5 and Comparativ...

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Abstract

The invention discloses a beneficiation method of low-grade copper-nickel sulfide ore. Two stages of grinding and flotation are adopted; roughing, scavenging and cleaning are carried out after first-stage grinding to obtain first-stage bulk concentrate and first-stage tailings; then the first-stage tailings are subjected to cyclone classification, second-stage grinding, one-time roughing, three-time scavenging and two-time cleaning sequentially to obtain second-grade bulk concentrate and second-grade tailings; and the first-stage bulk concentrate and the second-grade bulk concentrate are mixedto obtain the copper-nickel bulk concentrate. At the same time, a mixture of pine camphor oil and dodecylamine is adopted as a foaming agent in the method, and super-hydrophobic polyurethane nanoparticles are prepared to be used as a collector, thereby effectively removing gangue minerals, enhancing the flotation effect of copper-nickel minerals, and improving the grade and recovery rate of copper-nickel bulk concentrate. Through the above-mentioned approaches, the beneficiation method provided by the present invention can effectively classify low-grade copper-nickel sulfide ore, and the usage amount of chemical agents is small, the controllability is strong, and the actual needs can be met.

Description

technical field [0001] The invention relates to the technical field of beneficiation methods, in particular to a beneficiation method for low-grade copper-nickel sulfide ore. Background technique [0002] With the rapid development of the national economy, people's demand for copper and nickel continues to increase, which drives the development and utilization of corresponding ore resources. As the main nickel deposit, copper-nickel sulfide ore has become increasingly lean, fine and hybrid due to continuous in-depth mining. The problems of low ore grade, fine embedded particle size and high impurity content make the beneficiation of copper-nickel sulfide ore more and more difficult. , the traditional beneficiation methods have been difficult to effectively separate a large number of low-grade copper-nickel sulfide ore. Therefore, the development of beneficiation methods for low-grade copper-nickel sulfide ore is of great significance to improve the utilization rate of miner...

Claims

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Application Information

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IPC IPC(8): B03B9/00B03D1/00B03B1/00B03B5/34B03D1/01B03D101/04B03D101/02B03D103/02
CPCB03B9/00B03D1/00B03B1/00B03B5/34B03D1/01B03D2201/04B03D2201/02B03D2203/02
Inventor 戴兵张雷陈英贺桂成
Owner NANHUA UNIV
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