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CN-121988459-A - Combined reagent for copper-nickel sulfide ore mixed flotation and application

CN121988459ACN 121988459 ACN121988459 ACN 121988459ACN-121988459-A

Abstract

The invention discloses a combined reagent for copper-nickel sulfide ore mixed flotation and application thereof, and belongs to the technical field of mineral flotation reagents. The combined medicament consists of a component 1 (amine compound) and a component 2 (composite oil phase) which are independently packaged, wherein the component 2 is prepared by compounding sulfur nitrogen ester, no. 2 oil, N-dialkyl dithiocarbamate and nonionic surfactant. The invention ensures that the medicament has strong collecting property and good foamability by the synergistic combination of the stepwise addition of the two components and the inside of the component 2, obviously improves the recovery rate of the pentlandite and the chalcopyrite, simultaneously effectively solves the problems of easy crystallization and poor fluidity of the conventional medicament at low temperature, and has simple medicament system and low cost. The invention is especially suitable for the mixed flotation of copper-nickel sulfide ores, and has wide industrial application prospect.

Inventors

  • CHEN GUOJU
  • SUN GANG
  • HE LAIRONG
  • WANG HUAIRUI
  • SONG HONGRU
  • ZHANG RONG
  • WANG RENXIANG

Assignees

  • 金川集团股份有限公司
  • 金川镍钴研究设计院有限责任公司

Dates

Publication Date
20260508
Application Date
20260115

Claims (10)

  1. 1. The combined reagent for the mixed flotation of the copper-nickel sulfide ore is characterized by comprising a component 1 and a component 2 which are independently packaged, wherein the component 1 is an amine compound, and the component 2 comprises, by mass, 3-8 parts of sulfur nitrogen ester, 1-3 parts of No. 2 oil, 1-3 parts of N, N-dialkyl dithiocarbamate and a nonionic surfactant accounting for 0.1% -0.5% of the total mass of the component 2; the mass ratio of the component 1 to the component 2 is 1 (2-5).
  2. 2. The combination reagent for mixed flotation of copper-nickel sulfide ores according to claim 1, wherein the amine compound is one or two selected from ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine.
  3. 3. The combined reagent for copper-nickel sulfide ore mixed flotation according to claim 1, wherein the structural general formula of the sulfur nitrogen ester is R 1 -N(R 2 )-C(=S)-S-R 3 , wherein R 1 、R 2 is independently selected from H, C-C4 alkyl, and R 3 is C1-C4 alkyl or cyanoethyl.
  4. 4. The combination reagent for mixed flotation of copper-nickel sulfide ores according to claim 1, wherein the alkyl group in the N, N-dialkyldithiocarbamate is ethyl or butyl, and the cation thereof is sodium ion or potassium ion.
  5. 5. The combination reagent for mixed flotation of copper-nickel sulfide ores according to claim 1, wherein the nonionic surfactant is one selected from tween-80, alkylphenol ethoxylates and fatty alcohol ethoxylates.
  6. 6. The combined reagent for copper-nickel sulfide ore mixed flotation according to claim 1, wherein the preparation of the component 2 comprises the steps of mixing the sulfur nitrogen ester, the No. 2 oil and the nonionic surfactant according to a proportion, stirring for 20-40 minutes at a rotating speed of 30-60 revolutions per minute to form a uniform liquid phase, and slowly adding the N, N-dialkyl dithiocarbamate until the N, N-dialkyl dithiocarbamate is completely dissolved under continuous stirring to obtain a uniform transparent oily liquid.
  7. 7. Use of a combination agent according to any one of claims 1-6 in copper nickel sulphide ore flotation.
  8. 8. The method according to claim 7, wherein the component 1 is added to the pulp during flotation, and the component 2 is added after stirring for 3-5 minutes.
  9. 9. The use according to claim 8, wherein the combined medicament is used in a total amount of 200-400 g/ton of raw ore.
  10. 10. The use according to claim 8, wherein the flotation is carried out at a pulp concentration of 30% -40% and a grinding fineness of-0.074 mm of 70% -85%.

Description

Combined reagent for copper-nickel sulfide ore mixed flotation and application Technical Field The invention relates to the technical field of mineral flotation medicaments, in particular to a combined medicament for copper-nickel sulfide ore mixed flotation, a preparation method and application thereof, which are particularly suitable for efficiently collecting valuable minerals such as chalcopyrite, pentlandite and the like in the copper-nickel sulfide ore so as to obtain high-quality copper-nickel mixed concentrate. Background Copper nickel sulphide ore is an important nonferrous metal mineral resource, and main valuable minerals comprise chalcopyrite, pentlandite, chalcocite and the like, and gangue minerals are mostly silicate minerals. Flotation is a core process for separating and recycling copper-nickel sulfide ores, and the performance of a flotation reagent directly determines the advantages and disadvantages of flotation indexes. At present, aiming at the mixed flotation of copper-nickel sulfide ores in industrial production, a medicament system of matching traditional collectors such as xanthates, black medicines and the like with foaming agents (such as No. 2 oil) is generally adopted. However, the prior art has the defects that firstly, the selective collecting capability of a xanthate collecting agent on the pentlandite is insufficient, so that the nickel recovery rate is low, the full recovery of valuable minerals is difficult to realize, secondly, the problems of crystallization, viscosity surge, poor fluidity and the like of the traditional agent are easy to occur under a low-temperature environment (such as winter production in alpine regions), the traditional agent cannot be uniformly dispersed in ore pulp, the stability of a flotation effect is seriously affected, thirdly, the collecting agent and the foaming agent are required to be added independently, the agent system is complex, the operation flow is complex, the synergistic effect between the two agents is poor, the conditions of unbalanced foam stability, agent waste and the like are easy to occur, and fourthly, the total consumption of the traditional agent is large, so that the flotation cost is high and the economical efficiency is poor in order to reach the expected flotation index. Therefore, developing a special combined reagent for copper-nickel sulfide ore mixed flotation, which has the advantages of strong collection property, good foamability, strong low-temperature adaptability, simple reagent system and low cost, becomes a technical problem to be solved in the current mineral processing field. Disclosure of Invention Aiming at the defects of low collecting efficiency, poor low-temperature stability, complex reagent system and the like of the existing copper-nickel sulfide ore flotation reagent, the core aim of the invention is to provide the combined reagent for the mixed flotation of the copper-nickel sulfide ore, realize the efficient and collaborative collecting of the chalcopyrite and the pentlandite, improve the recovery rate of the copper and the nickel, improve the low-temperature use performance and simplify the flotation operation flow. In order to achieve the above purpose, the invention adopts the following technical scheme: The combined reagent for the mixed flotation of the copper-nickel sulfide ore comprises a component 1 and a component 2 which are independently packaged, wherein the component 1 is an amine compound, the component 2 comprises, by mass, 3-8 parts of sulfur nitrogen ester, 1-3 parts of No. 2 oil, 1-3 parts of N, N-dialkyl dithiocarbamate and a nonionic surfactant accounting for 0.1% -0.5% of the total mass of the component 2, and the use mass ratio of the component 1 to the component 2 is 1 (2-5). The amine compound is one or two selected from ethylenediamine, diethylenetriamine, triethylenetetramine and tetraethylenepentamine. The component can be used as an auxiliary collector and a dispersant in the flotation process, and has a synergistic effect with the subsequent sulfur nitrogen ester in the component 2, so that the collecting effect on the pentlandite is enhanced, the adsorption coverage of fine-grained gangue minerals on the surfaces of valuable minerals is reduced, and the flotation selectivity is improved. The structural general formula of the sulfur nitrogen ester is R 1-N(R2)-C(=S)-S-R3, wherein R 1、R2 is independently selected from H, C 1-C4 alkyl (such as methyl, ethyl, n-propyl, isopropyl, n-butyl and isobutyl), and R 3 is C 1-C4 alkyl (such as ethyl and isopropyl) or cyanoethyl. The sulfur nitrogen ester is used as a main collecting agent, has excellent selectivity and collecting capacity for chalcopyrite and pentlandite, has certain foaming performance, and lays a foundation for one-dose double effect. The alkyl in the N, N-dialkyl dithiocarbamate is ethyl or butyl, the cation of the alkyl is sodium ion or potassium ion, and specifically, the alkyl can be selected from sod