A zinc oxide mineral flotation collector and its preparation method and application

Abstract

This invention discloses a zinc oxide flotation collector, its preparation method, and its application. The collector is characterized by comprising, by weight, 90%–95% synthetic mixed alkylaminoacetic acid sodium salt and 5%–10% emulsifier; the mixed alkylaminoacetic acid sodium salt has the following structure: wherein R- represents a straight-chain hydrocarbon group composed of 14 and 16 carbon atoms. The preparation method includes emulsifier solution preparation, synthesis of mixed alkylaminoacetic acid sodium salt, emulsification reaction, and synergistic reaction steps. This invention provides a zinc oxide mineral beneficiation collector with good selectivity, strong collecting ability, low reagent dosage, and low-temperature resistance, making it particularly suitable for high-silica, low-calcium zinc oxide ores and exhibiting good zinc oxide flotation performance.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical technology, specifically relating to a zinc oxide mineral flotation collector, its preparation method, and its application. Background Technology

[0002] my country's long-term rapid economic development has consumed a large amount of mineral resources, leading to a decreasing amount of easily beneficiated zinc sulfide ore. However, my country's zinc oxide ore reserves are extremely abundant, ranking among the world's top. Due to the complex mineral composition of zinc oxide ore, the presence of many associated minerals, fine grain size, severe mudification, and high soluble salt content, coupled with the influence of various unavoidable ions, there is currently no ideal, efficient processing technology for zinc oxide ore, hindering its large-scale development and utilization. Therefore, strengthening the efficient development and utilization of zinc oxide ore resources is increasingly urgent.

[0003] The primary method for separating zinc oxide ore is flotation. Currently, the most commonly used method is the sulfide-amine process, which employs a combination collector of sodium sulfide and primary amine. However, this combination collector suffers from drawbacks such as poor low-temperature resistance, poor selectivity, high reagent consumption, high flotation costs, and low concentrate grades. Therefore, developing economical and efficient zinc oxide collectors is of great significance. Summary of the Invention

[0004] The first objective of this invention is to provide a zinc oxide mineral flotation collector; the second objective is to provide a method for preparing the zinc oxide mineral flotation collector; and the third objective is to provide the application of the zinc oxide mineral flotation collector.

[0005] The first objective of this invention is achieved as follows: a zinc oxide mineral beneficiation collector, characterized in that it is prepared by synthesizing monochloroacetic acid, sodium hydroxide, nonylphenol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether using a mixed alkylaminoacetic acid sodium salt, followed by emulsifier solution preparation, emulsification reaction, and synergistic reaction. The mixed alkylaminoacetic acid sodium salt has the following structure:

[0006]

[0007] In this case, R- represents a straight-chain hydrocarbon group consisting of 14 and 16 carbon atoms.

[0008] The second objective of this invention is achieved by comprising the steps of synthesizing mixed alkylaminoacetic acid sodium salts, preparing an emulsifier solution, performing an emulsification reaction, and a synergistic reaction, specifically including:

[0009] A. Preparation of emulsifier solution: Nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether are mixed in a mass ratio of 1:1 and stirred evenly to obtain emulsifier solution a;

[0010] B. Synthesis of mixed alkylaminoacetic acid sodium salts:

[0011] 1) Add monochloroacetic acid to an aqueous solution and stir until dissolved to obtain reaction solution b, wherein the mass ratio of monochloroacetic acid to water is 1:2;

[0012] 2) Dodecylamine and hexadecylamine are added to reaction solution b, and sodium hydroxide aqueous solution is added dropwise under constant temperature of 90~100℃. The reaction is carried out for 1.8~2 hours to obtain mixed alkylaminoacetic acid sodium c, wherein the mass ratio of reaction solution b, dodecylamine, hexadecylamine and sodium hydroxide aqueous solution is 1:2:5; the concentration of sodium hydroxide aqueous solution is 40%.

[0013] C. Emulsification reaction: Mixed sodium alkylaminoacetate was added to emulsifier solution a under constant temperature water bath conditions of 40~50℃ to obtain emulsion d;

[0014] D. Synergistic reaction: Mix the mixed emulsion d with the emulsifier solution a and keep it in a constant temperature water bath at 40~45℃ for 0.5~0.8h to obtain the target zinc oxide mineral flotation collector, wherein the mass ratio of emulsion d to emulsifier solution a is 10:1.

[0015] The aforementioned mixed alkylaminoacetic acid sodium has the following structure:

[0016]

[0017] In this case, R- represents a straight-chain hydrocarbon group consisting of 14 and 16 carbon atoms.

[0018] The nonylphenol polyoxyethylene ether has the following structure:

[0019]

[0020] R represents a hydrocarbon group consisting of 9 carbon atoms.

[0021] The fatty alcohol polyoxyethylene ether has the following structure:

[0022]

[0023] Where R represents a hydrocarbon group consisting of 6 to 10 carbon atoms.

[0024] The third objective of this invention is achieved as follows: the collector of this invention is used as a flotation reagent for zinc oxide ore flotation. After the zinc oxide ore has been ground and sent to the flotation cell, a flotation modifier and the collector of this invention are added in sequence to obtain zinc oxide concentrate flotation froth and tailings in the flotation cell. Attached Figure Description

[0025] Figure 1 This is a process flow diagram for preparing the zinc oxide ore flotation collector of the present invention;

[0026] Figure 2This is a flowchart of the flotation test of the zinc oxide ore flotation collector of the present invention. Detailed Implementation

[0027] The present invention will be further described below with reference to embodiments and accompanying drawings, but this does not limit the present invention in any way. Any modifications or substitutions made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0028] The invention will be further illustrated below with specific implementation examples:

[0029] Example 1

[0030] Emulsifier solution a was obtained by stirring nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether in a mass ratio of 1:1 until homogeneous.

[0031] Add monochloroacetic acid to an aqueous solution and stir until dissolved to obtain reaction solution b, wherein the mass ratio of monochloroacetic acid to water is 1:2;

[0032] Dodecylamine and hexadecylamine were added to reaction solution b, and sodium hydroxide aqueous solution was added dropwise under constant temperature of 90°C. The reaction was carried out for 1.8 h to obtain mixed alkylaminoacetic acid sodium c, wherein the mass ratio of reaction solution b, dodecylamine, hexadecylamine and sodium hydroxide aqueous solution was 1:2:5, and the concentration of sodium hydroxide aqueous solution was 40%.

[0033] Emulsion d was obtained by adding mixed sodium alkyl aminoacetate to emulsifier solution a under constant temperature water bath conditions of 40~50℃.

[0034] The mixed emulsion d and emulsifier solution a were mixed and kept in a constant temperature water bath at 40~45℃ for 0.6h to obtain the target zinc oxide mineral flotation collector, wherein the mass ratio of emulsion d to emulsifier solution a was 10:1.

[0035] Example 2

[0036] Emulsifier solution a was obtained by stirring nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether in a mass ratio of 1:1 until homogeneous.

[0037] Add monochloroacetic acid to an aqueous solution and stir until dissolved to obtain reaction solution b, wherein the mass ratio of monochloroacetic acid to water is 1:2;

[0038] Dodecylamine and hexadecylamine were added to reaction solution b, and sodium hydroxide aqueous solution was added dropwise under constant temperature of 90°C for 2.0 h to obtain mixed alkylaminoacetic acid sodium c, wherein the mass ratio of reaction solution b, dodecylamine, hexadecylamine and sodium hydroxide aqueous solution was 1:2:5, and the concentration of sodium hydroxide aqueous solution was 40%.

[0039] Emulsion d was obtained by adding mixed sodium alkyl aminoacetate to emulsifier solution a under constant temperature water bath conditions of 40~50℃.

[0040] The mixed emulsion d and emulsifier solution a were mixed and kept in a constant temperature water bath at 40~45℃ for 0.8h to obtain the target zinc oxide mineral flotation collector, wherein the mass ratio of emulsion d to emulsifier solution a was 10:1.

[0041] Example 3

[0042] Take a zinc oxide mine in Sichuan as an example.

[0043] Properties of the raw ore: The raw material contains 8.26% Zn, 31.80% SiO2, and has a zinc oxidation rate of 85%.

[0044] Experimental Procedure: A single roughing test was conducted, with 85% of the grinding fineness being -0.074mm. The modifiers were 4000g / t sodium carbonate + 800g / t sodium silicate, and the collector from Example 1 was used at a dosage of 250g / t. The process flow is as follows: Figure 2 As shown.

[0045] Mineral processing parameters: Zn content of zinc concentrate is 21.54%, and Zn recovery rate is 80.74%.

[0046] Example 4

[0047] Take a zinc oxide mine in Yunnan as an example.

[0048] Properties of the raw ore: The raw material contains 5.35% Zn, 35.80% SiO2, and has a zinc oxidation rate of 90%.

[0049] Experimental Procedure: A single roughing test was conducted, with 80% of the grinding fineness being -0.074mm. The modifiers were 3000g / t sodium carbonate + 1000g / t sodium silicate. The collector from Example 2 was used at a dosage of 200g / t. The process flow is as follows: Figure 2 As shown.

[0050] Mineral processing parameters: Zn content of zinc concentrate is 18.99%, and Zn recovery rate is 83.74%.

Claims

1. A zinc oxide mineral flotation collector, characterized in that: The zinc oxide mineral flotation collector is prepared by synthesizing monochloroacetic acid, sodium hydroxide, nonylphenol polyoxyethylene ether, and fatty alcohol polyoxyethylene ether using mixed alkylaminoacetic acid sodium salt, preparing an emulsifier solution, undergoing emulsification reaction, and synergistic reaction. The mixed alkylaminoacetic acid sodium salt has the following structure: Wherein, R- represents a straight-chain hydrocarbon group consisting of 14 or 16 carbon atoms; The preparation method of the zinc oxide mineral flotation collector includes the steps of synthesizing mixed sodium alkylaminoacetate, preparing emulsifier solution, emulsification reaction, and synergistic reaction, specifically including: A. Preparation of emulsifier solution: Nonylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether are mixed in a mass ratio of 1:1 and stirred evenly to obtain emulsifier solution a; B. Synthesis of mixed alkylaminoacetic acid sodium salts: 1) Add monochloroacetic acid to an aqueous solution and stir until dissolved to obtain reaction solution b; 2) Add dodecylamine and hexadecylamine to reaction solution b, and add sodium hydroxide aqueous solution dropwise under constant temperature of 90~100℃. React for 1.8~2h to obtain mixed alkylaminoacetic acid sodium c; C. Emulsification reaction: Mixed sodium alkylaminoacetate was added to emulsifier solution a under constant temperature water bath conditions of 40~50℃ to obtain emulsion d; D. Synergistic reaction: Mix the mixed emulsion d with the emulsifier solution a and keep it in a constant temperature water bath at 40~45℃ for 0.5~0.8h to obtain the target zinc oxide mineral flotation collector.

2. The zinc oxide mineral flotation collector according to claim 1, characterized in that... The nonylphenol polyoxyethylene ether described herein has the following structure: In this case, R- represents a hydrocarbon group consisting of 9 carbon atoms.

3. The zinc oxide mineral flotation collector according to claim 1, characterized in that... The fatty alcohol polyoxyethylene ether has the following structure: In this case, R- represents a hydrocarbon group consisting of 6 to 10 carbon atoms.

4. The zinc oxide mineral flotation collector according to claim 1, characterized in that, In step B, the mass ratio of the reaction solution b component monochloroacetic acid to water is 1:2; the mass ratio of the reaction solution b, dodecylamine, hexadecylamine, and sodium hydroxide aqueous solution is 1:2:5; and the concentration of the sodium hydroxide aqueous solution is 40%.

5. The zinc oxide mineral flotation collector according to claim 1, characterized in that, In the synergistic reaction, the mass ratio of emulsion d to emulsifier solution a is 10:1.

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