Gold antimony ore flotation reagent and preparation method thereof

Abstract

The invention relates to the technical field of gold and antimony ore flotation reagents, in particular to a gold and antimony ore flotation reagent and a preparation method thereof.The gold and antimony ore flotation reagent comprises, by weight, 10-30 parts of a collecting agent A, 5-15 parts of a foaming agent B, 2-8 parts of a regulator C, 1-5 parts of a stabilizer D, 0.5-3 parts of an innovative synergist E, 0.1-1 part of a surface activity enhancer F and 0.01-0.5 part of nano synergistic particles G; the method has the beneficial effects that by adding the stabilizer and the innovative synergist, the stability of the agent in ore pulp is enhanced, the decomposition and failure of the agent are reduced, nano synergistic particles are adopted, and the small-size effect and the surface effect of the nano synergistic particles are utilized, so that the dispersity and the activity of the agent are improved, and the stability of the agent is further enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of gold-antimony ore flotation reagents, and particularly to a gold-antimony ore flotation reagent and a preparation method thereof. Background Art

[0002] In the process of gold-antimony ore mining and processing, flotation is a key ore dressing method. Flotation separates valuable minerals from gangue minerals by taking advantage of the differences in the surface properties of minerals and with the help of flotation reagents, so as to achieve the purpose of enrichment and purification.

[0003] Traditional gold-antimony ore flotation reagents mainly consist of collectors, frothers and regulators. The collector is responsible for selectively adsorbing on the mineral surface to make it hydrophobic; the frother is used to generate and stabilize bubbles to bring hydrophobic mineral particles into the foam layer; the regulator is used to adjust the pH value, ionic strength, etc. of the pulp to optimize the flotation environment.

[0004] However, with the increasing depletion of gold-antimony ore resources and the complication of ore properties, traditional flotation reagents are difficult to meet the requirements of efficient and environmental protection ore dressing. The specific problems are as follows:

[0005] Poor selectivity of the collector: Traditional collectors have limited selectivity for gold-antimony ore and are difficult to effectively distinguish valuable minerals from gangue minerals in complex ores.

[0006] Poor stability of the frother: The foam generated by traditional frothers has insufficient stability, which easily leads to the shedding and loss of mineral particles during the flotation process.

[0007] Single function of the regulator: Traditional regulators are mainly used to adjust the pH value, and have limited ability to adjust other factors affecting the flotation effect in the pulp.

[0008] Poor environmental protection of the reagent: Some traditional flotation reagents contain toxic and harmful substances, which cause pollution to the environment and do not meet the requirements of green ore dressing.

[0009] Therefore, it is necessary to develop a new type, efficient and environmental protection gold-antimony ore flotation reagent. Summary of the Invention

[0010] The purpose of the present invention is to provide a gold-antimony ore flotation reagent and a preparation method thereof to solve the problems raised in the above background art.

[0011] To achieve the above purpose, the present invention provides the following technical solution: A gold-antimony ore flotation reagent, characterized in that: the reagent contains the following components in parts by weight: 10-30 parts of collector A, 5-15 parts of frother B, 2-8 parts of regulator C, 1-5 parts of stabilizer D, 0.5-3 parts of innovative synergist E, 0.1-1 part of surface activity enhancer F, and 0.01-0.5 part of nano synergistic particles G;

[0012] The collector A is an organic sulfur compound containing specific functional groups, which can effectively adsorb on the surface of gold-antimony minerals. The frother B is a non-ionic or anionic compound with surface activity. The regulator C is used to adjust the pH value and ionic strength of the pulp. The stabilizer D is used to improve the stability and dispersibility of the reagent in the pulp. The innovative synergistic agent E is an organic polymer compound with a specific structure, which can significantly enhance the adsorption of the collector A on the gold-antimony minerals. The surface activity enhancer F is used to further improve the spreading and wetting properties of the reagent on the pulp surface. The nano synergistic particles G are used to improve the permeability and reaction activity of the reagent.

[0013] Preferably, the collector A is specifically one or a mixture of sodium diethyldithiocarbamate or sodium dibutyldithiophosphate. The sulfur atoms and functional groups in its molecular structure can form stable chemical bonds with gold-antimony minerals. The innovative synergistic agent E is a polyethylene glycol derivative containing multiple hydroxyl or carboxyl groups, which can improve the flotation efficiency through synergistic action with the collector A. The surface activity enhancer F is selected from one or more of fatty acid esters, fatty alcohol ethers or silicone surfactants. The nano synergistic particles G are selected from one or more of silica, titanium dioxide or alumina nanoparticles, and their particle size is controlled within the range of 10-100 nanometers.

[0014] Preferably, the frother B is selected from one or more of methyl isobutyl carbinol, polyethylene glycol octyl phenyl ether or terpineol, and has good foaming performance and pulp dispersion ability.

[0015] Preferably, the regulator C is a combination of one or more of sodium hydroxide, sulfuric acid or sodium carbonate, and is used to precisely control the pH value of the pulp within the range of 4-10 to optimize the flotation effect.

[0016] Preferably, the stabilizer D is one or more of sodium carboxymethyl cellulose, polyvinylpyrrolidone or xanthan gum, which can effectively prevent the reagent from aggregating and precipitating in the pulp and maintain the activity of the reagent. Moreover, the addition of the stabilizer D makes the reagent more stable during storage and use and extends the validity period of the reagent.

[0017] A preparation method of a gold-antimony ore flotation reagent includes the following steps:

[0018] (a) Weigh each component in proportion;

[0019] (b) Dissolve the collector A and the regulator C in appropriate amounts of water respectively to obtain solution I and solution II. During the dissolution process, ultrasonic assistance is used for dissolution, and a small amount of dispersant is added to accelerate the dissolution process and improve the dissolution efficiency;

[0020] (c) Mix the foaming agent B and the stabilizer D evenly to obtain mixture III; during the mixing process, high-speed shear emulsification technology is adopted to improve the mixing uniformity;

[0021] (d) Add the innovative synergist E, the surface activity enhancer F, and the nano synergistic particles G to solution I or solution II and stir evenly; among them, the nano synergistic particles G need to be pre-treated by surface modification to improve their dispersibility and stability in the solution;

[0022] (e) Mix solution I, solution II, and mixture III evenly under stirring conditions, and adjust to the required pH value to obtain the gold-antimony ore flotation reagent; during the mixing process, temperature control is adopted to keep the mixing temperature within a specific range to optimize the reagent performance.

[0023] Preferably, in step (b), the water for dissolving the collector A and the regulator C is deionized water or distilled water, and the dissolution temperature is controlled at 20-50°C; the time for ultrasonic-assisted dissolution is 5-30 minutes, and the frequency is 20-100 kHz; the dispersant is selected from one or more of polyphosphate, sodium polyacrylate, or sodium lignosulfonate.

[0024] Preferably, in step (c), the shear speed of the high-speed shear emulsification technology is 5000-20000 revolutions per minute, and the shear time is 1-10 minutes; in step (d), the surface modification treatment of the nano synergistic particles G is carried out using a silane coupling agent or a titanate coupling agent; in step (e), the stirring speed during mixing is 50-300 revolutions per minute, and the mixing time is not less than 30 minutes to ensure that each component is fully mixed; and nitrogen protection is adopted during the mixing process to prevent the reagent from oxidation.

[0025] Preferably, it further includes step (f): filtering or centrifuging the gold-antimony ore flotation reagent obtained in step (e) to remove insoluble impurities and improve the purity of the reagent; and low-temperature treatment is adopted during the filtering or centrifuging process to prevent the reagent from pyrolysis or deterioration; after filtering or centrifuging, vacuum drying treatment can also be carried out to further remove moisture and improve the stability of the reagent.

[0026] Preferably, it further includes step (g): packaging the gold-antimony ore flotation reagent obtained in step (f), storing it in a cool and dry place, and avoiding direct sunlight; and the packaging material adopts special materials that are light-proof, moisture-proof, and oxidation-proof, such as aluminum foil composite film or vacuum packaging bag, to maintain the stability and shelf life of the reagent; a desiccant can also be added during the packaging process to further prevent the reagent from getting damp.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] The gold-antimony ore flotation reagent proposed by the present invention and its preparation method enhance the stability of the reagent in the pulp by adding stabilizers and innovative synergists, reduce the decomposition and failure of the reagent, and use nano-enhancing particles to utilize their small-size effect and surface effect to improve the dispersibility and activity of the reagent, further enhancing the stability of the reagent. The novel flotation reagent has higher activity and selectivity, can achieve the same flotation effect at a lower dosage, reduce the reagent cost; by optimizing the reagent formula and preparation process, improve the utilization rate of the reagent and reduce the waste of the reagent. The novel flotation reagent has good adaptability to gold-antimony ores with different properties, can process complex ores and refractory ores; by adjusting the reagent formula and flotation conditions, it can flexibly respond to changes in the properties of different ores, improving the flexibility and reliability of ore dressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to clearly and completely describe the objectives, technical solutions of the present invention and make the advantages more clearly understood, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some but not all of the embodiments of the present invention, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0031] Example 1, please refer to Figure 1 The present invention provides a technical solution: a gold-antimony ore flotation reagent, and its components and parts by weight are as follows:

[0032] Collector A: Sodium diethyldithiocarbamate, 20 parts;

[0033] Foaming agent B: Methyl isobutyl carbinol, 10 parts;

[0034] Regulator C: Sodium hydroxide, 5 parts;

[0035] Stabilizer D: Sodium carboxymethyl cellulose, 3 parts;

[0036] Innovative synergist E: Polyethylene glycol derivative (containing multiple hydroxyl groups), 1.5 parts;

[0037] Surface activity enhancer F: Fatty acid ester, 0.5 part;

[0038] Nano-enhancing particle G: Silicon dioxide nanoparticle (particle size 20 nanometers), 0.1 part.

[0039] Preparation method:

[0040] Weigh each component proportionally.

[0041] Dissolve collector A and regulator C separately in appropriate amount of deionized water. Control the dissolution temperature at 30°C, use ultrasonic wave to assist dissolution for 15 minutes with a frequency of 50 kHz, and add a small amount of polyphosphate as a dispersant to obtain Solution I and Solution II.

[0042] Mix frother B and stabilizer D evenly, adopt high-speed shear emulsification technology with a shear speed of 10,000 revolutions per minute and a shear time of 5 minutes to obtain Mixture III.

[0043] Add innovation synergist E, surface activity enhancer F, and nano synergistic particles G (previously surface-modified with silane coupling agent) to Solution I and stir evenly.

[0044] Mix Solution I, Solution II, and Mixture III evenly under stirring conditions with a stirring speed of 150 revolutions per minute and a mixing time of 45 minutes, adjust the pH value to 7 to obtain the gold-antimony ore flotation reagent. Nitrogen protection is adopted during the mixing process.

[0045] Filter the obtained gold-antimony ore flotation reagent to remove insoluble impurities.

[0046] Perform vacuum drying treatment after filtration to remove moisture.

[0047] Pack the dried gold-antimony ore flotation reagent with an aluminum foil composite film and store it in a cool and dry place.

[0048] Example 2: A gold-antimony ore flotation reagent, whose components and weight parts are as follows:

[0049] Collector A: Sodium dibutyldithiophosphate, 25 parts;

[0050] Frother B: Polyethylene glycol octyl phenyl ether, 12 parts;

[0051] Regulator C: Sulfuric acid, 6 parts (used in combination with sodium hydroxide to adjust pH);

[0052] Stabilizer D: Polyvinylpyrrolidone, 4 parts;

[0053] Innovation synergist E: Polyethylene glycol derivative (containing multiple carboxyl groups), 2 parts;

[0054] Surface activity enhancer F: Fatty alcohol ether, 0.8 part;

[0055] Nano synergistic particles G: Titanium dioxide nanoparticles (particle size 50 nanometers), 0.3 part.

[0056] Preparation method:

[0057] Weigh each component proportionally.

[0058] Dissolve collector A and regulator C (first add part of sodium hydroxide to adjust to a suitable pH for dissolution) separately in appropriate amounts of distilled water. Control the dissolution temperature at 40 °C, use ultrasonic assistance to dissolve for 20 minutes, with a frequency of 70 kHz, and add a small amount of sodium lignosulfonate as a dispersant to obtain Solution I and Solution II.

[0059] Mix frother B and stabilizer D evenly, and use high-speed shear emulsification technology with a shear speed of 15,000 revolutions per minute and a shear time of 8 minutes to obtain Mixture III.

[0060] Add innovation synergist E, surface activity enhancer F, and nano-synergistic particles G (previously surface-modified with titanate coupling agent) to Solution II and stir evenly.

[0061] Mix Solution I, Solution II (which has added nano-synergistic particles, etc.), and Mixture III evenly under stirring conditions. The stirring speed is 200 revolutions per minute, and the mixing time is 60 minutes. Adjust the pH value to 6 to obtain the gold-antimony ore flotation reagent. Nitrogen protection is used during the mixing process.

[0062] Centrifuge the obtained gold-antimony ore flotation reagent to remove insoluble impurities.

[0063] After centrifugation, perform vacuum drying treatment and add a desiccant to further remove moisture.

[0064] Package the dried gold-antimony ore flotation reagent using a vacuum packaging bag and store it in a cool and dry place.

[0065] Example 3, a gold-antimony ore flotation reagent, whose components and weight parts are as follows:

[0066] Collector A: A mixture of sodium diethyldithiocarbamate and sodium dibutyldithiophosphate (ratio 1:1), 30 parts;

[0067] Frother B: Terpineol, 8 parts;

[0068] Regulator C: Sodium carbonate, 7 parts;

[0069] Stabilizer D: Xanthan gum, 2 parts;

[0070] Innovation synergist E: Polyethylene glycol derivative with a specific structure, 2.5 parts;

[0071] Surface activity enhancer F: Siloxane surfactant, 0.3 parts;

[0072] Nano-synergistic particles G: Alumina nanoparticles (particle size 80 nm), 0.4 parts.

[0073] Preparation method:

[0074] Weigh each component according to the proportion.

[0075] Dissolve collector A and regulator C separately in appropriate amounts of deionized water. Control the dissolution temperature at 25 °C, use ultrasonic assistance for dissolution for 10 minutes, with a frequency of 40 kHz, and add a small amount of sodium polyacrylate as a dispersant to obtain Solution I and Solution II.

[0076] Mix frother B and stabilizer D evenly, and use high-speed shear emulsification technology with a shear speed of 8000 revolutions per minute and a shear time of 3 minutes to obtain Mixture III.

[0077] Add innovation synergist E, surface activity enhancer F, and nano-synergistic particles G (previously surface-modified with a suitable coupling agent) to Solution I and stir evenly.

[0078] Mix Solution I, Solution II, and Mixture III evenly under stirring conditions. The stirring speed is 100 revolutions per minute, and the mixing time is 35 minutes. Adjust the pH value to 8 to obtain the gold-antimony ore flotation reagent. Nitrogen protection is used during the mixing process.

[0079] Filter the obtained gold-antimony ore flotation reagent to remove insoluble impurities, and perform the filtration at a low temperature.

[0080] Perform vacuum drying after filtration to ensure the removal of all moisture.

[0081] Pack the dried gold-antimony ore flotation reagent with special light-shielding materials and store it in a cool and dry place, avoiding direct sunlight.

[0082] Example 4. A gold-antimony ore flotation reagent, the components and their weight portions are as follows:

[0083] Collector A: Sodium diethyldithiocarbamate, 15 parts;

[0084] Frother B: A mixture of methyl isobutyl carbinol and polyethylene glycol octyl phenyl ether (ratio 2:1), 15 parts;

[0085] Regulator C: A mixture of sodium hydroxide and sulfuric acid (for precisely adjusting the pH), 4 parts (subject to the actual amount for adjusting to the required pH);

[0086] Stabilizer D: A mixture of sodium carboxymethyl cellulose and polyvinylpyrrolidone (ratio 1:1), 5 parts;

[0087] Innovation synergist E: A polyethylene glycol derivative containing multiple hydroxyl and carboxyl groups, 1 part;

[0088] Surfactant enhancer F: A mixture of fatty acid esters and fatty alcohol ethers (ratio 1:1), 1 part;

[0089] Nano-enhancing particle G: A mixture of silica and titanium dioxide nanoparticles (particle sizes are 30 nm and 60 nm respectively, ratio 1:1), 0.2 part.

[0090] Preparation method:

[0091] Weigh each component according to the ratio.

[0092] Dissolve collector A and regulator C (first add part of sodium hydroxide and adjust to a suitable pH for dissolution and reaction with sulfuric acid as needed) separately in an appropriate amount of deionized water. Control the dissolution temperature at 50 °C, use ultrasonic assistance for dissolution for 30 minutes, with a frequency of 100 kHz, and add a small amount of composite dispersant (a mixture of polyphosphate and sodium lignosulfonate) to obtain Solution I and Solution II.

[0093] Mix foaming agent B and stabilizer D evenly, and use high-speed shear emulsification technology with a shear speed of 20,000 revolutions per minute and a shear time of 10 minutes to obtain Mixture III.

[0094] Add innovative enhancer E, surfactant enhancer F, and nano-enhancing particle G (previously surface-modified with a suitable coupling agent respectively) to Solution I or Solution II (selected according to solubility), and stir evenly.

[0095] Mix Solution I, Solution II, and Mixture III evenly under stirring conditions, with a stirring speed of 300 revolutions per minute and a mixing time of not less than 60 minutes to ensure that each component is fully mixed, and adjust the pH value to 9 to obtain the gold-antimony ore flotation reagent. During the mixing process, use nitrogen protection to prevent the oxidation of the reagent.

[0096] Subject the obtained gold-antimony ore flotation reagent to a combined treatment of centrifugation and filtration to remove insoluble impurities and fine particles.

[0097] After treatment, conduct vacuum drying treatment, and add a high-efficiency desiccant during packaging to ensure the long-term stability of the reagent.

[0098] Package the dried gold-antimony ore flotation reagent using multi-layer composite packaging materials and store it in a cool, dry, and dark environment to ensure the validity period and performance of the reagent.

[0099] The comparison tables of Examples 1 to 4 with the prior art are as follows:

[0100]

[0101] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flotation reagent for gold-antimony ore, characterized in that: The agent comprises the following components in parts by weight: 10-30 parts of collector A, 5-15 parts of foaming agent B, 2-8 parts of regulator C, 1-5 parts of stabilizer D, 0.5-3 parts of innovative synergist E, 0.1-1 parts of surface activity enhancer F and 0.01-0.5 parts of nano synergist particles G; Collector A is an organic sulfur compound containing specific functional groups, which can effectively adsorb on the surface of gold-antimony minerals. Foaming agent B is a non-ionic or anionic compound with surface activity. Adjuster C is used to adjust the pH value and ionic strength of the slurry. Stabilizer D is used to improve the stability and dispersibility of the agent in the slurry. Innovative enhancer E is an organic polymer compound with a specific structure, which can significantly enhance the adsorption of collector A and gold-antimony minerals. Surface activity enhancer F is used to further improve the spreadability and wettability of the agent on the slurry surface. Nano-synergistic particle G is used to improve the permeability and reactivity of the agent.

2. The flotation reagent for gold-antimony ore according to claim 1, characterized in that: Collector A is specifically one of sodium diethyldithiocarbamate or sodium dibutyldithiophosphate or a mixture of the two, and the sulfur atoms and functional groups in its molecular structure can form stable chemical bonds with gold-antimony minerals; the innovative enhancer E is a polyethylene glycol derivative containing multiple hydroxyl groups or carboxyl groups, which improves the flotation efficiency through synergistic effect with collector A; the surfactant enhancer F is selected from one or more of fatty acid esters, fatty alcohol ethers or silicone surfactants; the nano-synergist particles G are selected from one or more of silicon dioxide, titanium dioxide or aluminum oxide nanoparticles, and their particle size is controlled in the range of 10-100 nanometers.

3. The flotation reagent for gold-antimony ore according to claim 2, characterized in that: The foaming agent B is selected from one or more of methyl isobutyl carbinol, polyethylene glycol octyl phenyl ether or terpineol, and has good foaming performance and slurry dispersing ability.

4. The flotation reagent for gold-antimony ore according to claim 3, characterized in that: Adjuster C is a combination of one or more of sodium hydroxide, sulfuric acid or sodium carbonate, and is used to accurately control the pH value of the pulp within the range of 4-10 to optimize the flotation effect.

5. The flotation reagent for gold-antimony ore according to claim 1, characterized in that: Stabilizer D is one or more of sodium carboxymethyl cellulose, polyvinyl pyrrolidone or xanthan gum, which effectively prevents the agent from aggregating and precipitating in the slurry and maintains the activity of the agent; and the addition of stabilizer D makes the agent more stable during storage and use, thereby extending the shelf life of the agent.

6. A method for preparing a gold-antimony ore flotation reagent as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: (a) weighing each component in proportion; (b) dissolving the collector A and the regulator C in appropriate amounts of water to obtain solutions I and II, respectively; wherein ultrasonic wave is used to assist dissolution during the dissolution process, and a small amount of dispersant is added to accelerate the dissolution process and improve the dissolution efficiency; (c) mixing the foaming agent B and the stabilizer D to obtain a mixture III; during the mixing process, a high-speed shear emulsification technology is used to improve the mixing uniformity; (d) adding the innovative synergist E, the surfactant enhancer F and the nano synergist particles G to the solution I or the solution II and stirring them evenly; wherein the nano synergist particles G need to be surface modified in advance to improve their dispersibility and stability in the solution; (e) mixing solution I, solution II and mixture III uniformly under stirring conditions and adjusting the pH value to a desired value to obtain a gold-antimony ore flotation reagent; temperature control is adopted during the mixing process to maintain the mixing temperature within a specific range to optimize the reagent performance.

7. The method for preparing a gold-antimony ore flotation reagent according to claim 6, characterized in that: The water used to dissolve the collector A and the regulator C in step (b) is deionized water or distilled water, and the dissolution temperature is controlled at 20-50° C. The ultrasonic-assisted dissolution time is 5-30 minutes, and the frequency is 20-100 kHz. The dispersant is selected from one or more of polyphosphate, sodium polyacrylate or sodium lignin sulfonate.

8. The method for preparing a gold-antimony ore flotation reagent according to claim 7, characterized in that: In step (c), the shear rate of the high-speed shear emulsification technology is 5000-20000 rpm, and the shear time is 1-10 minutes; in step (d), the surface modification treatment of the nano synergistic particle G is carried out by using a silane coupling agent or a titanate coupling agent; in step (e), the stirring speed during mixing is 50-300 rpm, and the mixing time is not less than 30 minutes to ensure that the components are fully mixed; and nitrogen protection is used during the mixing process to prevent oxidation of the agent.

9. The method for preparing a gold-antimony ore flotation reagent according to claim 8, characterized in that: The method further comprises step (f): filtering or centrifuging the gold-antimony ore flotation reagent obtained in step (e) to remove insoluble impurities and improve the purity of the reagent; and adopting low temperature treatment during the filtering or centrifuging process to prevent the reagent from being pyrolyzed or deteriorated; and after filtering or centrifuging, vacuum drying treatment can be further performed to further remove moisture and improve the stability of the reagent.

10. The method for preparing a gold-antimony ore flotation reagent according to claim 9, characterized in that: The method further comprises the step (g): packaging the gold-antimony ore flotation reagent obtained in the step (f) and storing it in a cool and dry place away from direct sunlight; and the packaging material is a special material that is light-proof, moisture-proof and oxidation-proof, such as an aluminum foil composite film or a vacuum packaging bag, to maintain the stability and shelf life of the reagent; and a desiccant can also be added during the packaging process to further prevent the reagent from getting damp.

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