Novel sulphide ore beneficiation activating agent and preparation method thereof

Abstract

The invention provides a novel mineral separation activating agent for sulphide ores and a preparation method of the novel mineral separation activating agent. The cleaning agent comprises 1-2 parts of basic cupric carbonate, 2-4 parts of ammonium chloride, 2-4 parts of nanometer jade powder, 2-3 parts of alginic acid, 1-2 parts of allyl glycidyl ether, 2-3 parts of peregal O, 2-3 parts of sodium di-sec-octyl maleate sulfonate, 2-3 parts of vinyl acetate, 4-7 parts of hydrogen peroxide, 4-6 parts of disodium hydrogen phosphate and 40-50 parts of water. The preparation method comprises the following steps: firstly mixing basic cupric carbonate and ammonium chloride to obtain a first mixture, then mixing the rest components, heating and stirring to obtain a second mixture, and finally uniformly mixing the first mixture and the second mixture. The activating agent overcomes the defects of a traditional activating agent, has efficient activating performance, can improve the beneficiation efficiency of low-grade, complex and refractory sulfide ore, is environmentally friendly, good in stability and high in adaptability, and provides technical support for efficient development of sulfide ore resources.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral processing, in particular to a new type of sulfide ore beneficiation activator and a preparation method thereof. BACKGROUND

[0002] Sulfide ore, as an important part of metallic mineral resources, is widely distributed around the world. The metal elements such as copper, lead, zinc and nickel contained in sulfide ore play an irreplaceable role in industrial production, national defense construction and daily life. With the depletion of high-grade and easily selected sulfide ore resources, the efficient utilization of low-grade and complex and difficult-to-select sulfide ore has become a research hotspot in the field of mineral resources development.

[0003] In the process of sulfide ore beneficiation, the role of activator is crucial. It can improve the floatability of minerals by chemical reaction with the surface of minerals, thereby improving the recovery rate and concentrate grade of the target minerals. At present, the commonly used sulfide ore beneficiation activators in industry mainly include traditional inorganic activators such as copper sulfate, lead nitrate and sodium sulfide. However, these traditional activators have many limitations in application: on the one hand, the activation effect is greatly affected by factors such as ore properties and pulp pH, and the activation effect on complex and difficult-to-select sulfide ore is often not ideal; on the other hand, some traditional activators are toxic and can easily pollute the environment, which does not meet the development concept of green mine construction.

[0004] In addition, the mechanism of traditional activators is relatively single, which is difficult to meet the requirements of multi-metal sulfide ore separation and sorting. When dealing with ores containing multiple sulfide minerals, multiple activators often need to be used together, which not only increases the beneficiation cost, but also may cause mutual interference between the reagents, affecting the beneficiation index. At the same time, some traditional activators have poor stability during storage and transportation, and are prone to decomposition or metamorphism, further affecting their use effect.

[0005] In order to solve the above problems, it is urgent to develop a new type of sulfide ore beneficiation activator which is efficient, environmentally friendly and has strong adaptability. The new type of activator should have better activation performance, which can effectively improve the beneficiation efficiency of low-grade, complex and difficult-to-select sulfide ore; at the same time, environmentally friendly raw materials should be used to reduce the impact on the ecological environment; in addition, it should also have good stability and adaptability to meet the beneficiation needs under different working conditions. Based on this, the present application proposes a new type of sulfide ore beneficiation activator and a preparation method thereof, which aims to provide new technical support for the efficient development and utilization of sulfide ore resources. SUMMARY

[0006] Therefore, the present application proposes a new type of sulfide ore beneficiation activator and a preparation method thereof to solve the above problems.

[0007] The technical solution of the present invention is achieved as follows: a novel activator for sulfide ore beneficiation comprises, by weight, 1-2 parts of basic copper carbonate, 2-4 parts of ammonium chloride, 2-4 parts of nano jade powder, 2-3 parts of alginic acid, 1-2 parts of propenyl glycidyl ether, 2-3 parts of peregal O, 2-3 parts of sodium di-sec-octyl maleate sulfonate, 2-3 parts of vinyl acetate, 4-7 parts of hydrogen peroxide, 4-6 parts of disodium hydrogen phosphate and 40-50 parts of water.

[0008] Furthermore, a new sulfide ore beneficiation activator comprises, by weight, 1 part of basic copper carbonate, 3 parts of ammonium chloride, 3 parts of nano jade powder, 2.5 parts of alginate, 1.5 parts of propenyl glycidyl ether, 2.5 parts of peregal O, 2.5 parts of sodium di-sec-octyl maleate sulfonate, 2.5 parts of vinyl acetate, 5 parts of hydrogen peroxide, 5 parts of disodium hydrogen phosphate and 45 parts of water.

[0009] Furthermore, the particle size of the nano jade powder is less than 0.074 mm.

[0010] Furthermore, the alginic acid is natural alginic acid extracted from kelp.

[0011] Furthermore, the purity of the sodium di-secondary octyl maleate sulfonate is not less than 98%.

[0012] The preparation method of the novel sulfide ore dressing activator comprises the following steps: S1. Evenly mix basic copper carbonate and ammonium chloride to obtain a first mixture; S2, mixing nano jade powder, alginic acid, allyl glycidyl ether, peregal O, sodium di-sec-octyl maleate sulfonate, vinyl acetate, hydrogen peroxide, disodium hydrogen phosphate and water, heating to 60-65° C., and stirring at 2000-2500 rpm for 40-50 minutes to obtain a second mixture; S3. Evenly mix the first mixture and the second mixture to obtain a novel sulfide ore dressing activator.

[0013] Preferably, in step S1, when mixing basic copper carbonate and ammonium chloride, the stirring speed is 800-1200 rpm and the stirring time is 10-15 minutes.

[0014] Preferably, in step S3, when mixing the first mixture and the second mixture, the stirring speed is 1500-2000 rpm, and the stirring time is 20-30 minutes.

[0015] Preferably, in step S2, when heating and mixing the raw materials such as nano jade powder, a water bath heating method is adopted.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) High efficiency activation and high selectivity: the multiple components of the present application have synergistic effect. Basic copper carbonate can provide Cu 2+ activation center more gently and durably in the presence of ammonium ion, avoiding the problem of poor selectivity caused by the instant strong effect of copper sulfate. Nano jade powder, as a micro-particle carrier, can be adsorbed on the surface of minerals, increasing the activation sites and adjusting the rheological property of the ore slurry. Each surfactant and dispersant (PAXO, sodium di-n-octyl sulfosuccinate, etc.) can improve the dispersibility of the reagent and the contact efficiency with the mineral surface, thereby significantly improving the activation effect and selectivity to the target mineral.

[0017] (2) Environmentally friendly: the present application avoids the use of strong acid and strong base substances, and the pH environment is more gentle. The reagent has low corrosion, and some components are biodegradable, reducing the harm to the environment and operating personnel, and the wastewater treatment pressure is smaller.

[0018] (3) Good stability: through specific preparation process, each component is fully reacted and dispersed, forming a uniform and stable composite system, with long shelf life and not easy to separate and fail.

[0019] (4) Wide applicability: especially suitable for complex oxide-sulfide ore and polymetallic intergrowth ore which are difficult to be effectively activated by traditional copper sulfate, and can effectively improve the metal recovery rate and concentrate grade.

[0020] Through flotation test, it can be proved that the sulfide ore beneficiation activator provided by the present application, through its unique formula design and specific preparation process, can significantly improve the activation effect and selectivity to complex and difficult-to-select sulfide ore, and is much better than the traditional copper sulfate activator and the defective comparative product in concentrate grade and metal recovery rate, and has good industrial application prospect. DETAILED DESCRIPTION

[0021] In order to better understand the technical content of the present application, the following specific examples are provided to further illustrate the present application.

[0022] The experimental methods used in the embodiments of the present application are conventional methods unless otherwise specified.

[0023] The materials, reagents, etc. used in the embodiments of the present application can be obtained from commercial channels unless otherwise specified.

[0024] Example 1 Prepare raw materials according to the following weight ratio: 1 part of basic copper carbonate, 2 parts of ammonium chloride, 2 parts of nano jade powder (particle size 0.06 mm), 2 parts of natural alginic acid extracted from kelp, 1 part of propylene glycidyl ether, 2 parts of PAXO, 2 parts of sodium di-n-octyl sulfosuccinate (purity 98.5%), 2 parts of vinyl acetate, 4 parts of hydrogen peroxide, 4 parts of disodium hydrogen phosphate, and 40 parts of water.

[0025] Preparation process: S1. Stirring basic copper carbonate and ammonium chloride at 800 rpm for 10 minutes to obtain a first mixture; S2. The remaining raw materials were mixed, heated to 60° C. in a water bath, and stirred at 2000 rpm for 40 minutes to obtain a second mixture; S3. Stir the first and second mixtures at 1500 rpm for 20 minutes to obtain an activator.

[0026] Example 2 Prepare the raw materials according to the following weight ratio: 2 parts of basic copper carbonate, 4 parts of ammonium chloride, 4 parts of nano jade powder (particle size 0.07 mm), 3 parts of natural alginate extracted from kelp, 2 parts of propenyl glycidyl ether, 3 parts of peregal O, 3 parts of sodium dioctyl maleate sulfonate (purity 98.8%), 3 parts of vinyl acetate, 7 parts of hydrogen peroxide, 6 parts of disodium hydrogen phosphate, and 50 parts of water.

[0027] Preparation process: S1. Stirring basic copper carbonate and ammonium chloride at 1200 rpm for 15 minutes to obtain a first mixture; S2. The remaining raw materials were mixed, heated to 65° C. in a water bath, and stirred at 2500 rpm for 50 minutes to obtain a second mixture; S3. Stir the first and second mixtures at 2000 rpm for 30 minutes to obtain an activator.

[0028] Example 3 Prepare the raw materials according to the following weight ratio: 1 part of basic copper carbonate, 3 parts of ammonium chloride, 3 parts of nano jade powder (particle size 0.05mm), 2.5 parts of natural alginate extracted from kelp, 1.5 parts of propenyl glycidyl ether, 2.5 parts of peregal O, 2.5 parts of sodium dioctyl maleate sulfonate (purity 99%), 2.5 parts of vinyl acetate, 5 parts of hydrogen peroxide, 5 parts of disodium hydrogen phosphate, and 45 parts of water.

[0029] Preparation process: S1, basic copper carbonate and ammonium chloride were stirred at 1000 rpm for 12 minutes to obtain a first mixture S2. The remaining raw materials were mixed, heated to 62° C. in a water bath, and stirred at 2200 rpm for 45 minutes to obtain a second mixture; S3. Stir the first and second mixtures at 1800 rpm for 25 minutes to obtain an activator.

[0030] Comparative Example 1 The difference between this comparative example and Example 3 is that the same formula and preparation method as Example 3 are used, but nano jade powder and alginic acid are not added, and the other components and amounts remain unchanged to prepare an activator Comparative Example 2 The difference between this comparative example and Example 3 is that the same formulation and preparation method as in Example 3 are used, but no ammonium chloride is added, and the amounts of the other components remain unchanged, to prepare the activator.

[0031] Comparative Example 3 The difference between this comparative example and Example 3 is that the same formulation and preparation method as in Example 3 are used, but copper sulfate providing equivalent Cu 2+ is used instead of basic copper carbonate, and ammonium chloride is omitted, and the amounts of the other components remain unchanged, to prepare the activator.

[0032] Comparative Example 4 Formulation: same as Example 3 Preparation method: in step S2, no heating (room temperature) is performed, the stirring speed is reduced to 500 rpm, and the stirring time is shortened to 15 minutes. The other steps are the same as in Example 3, to prepare the activator.

[0033] Test Example 1 Test method: 1. Ore sample: taken from the zinc flotation feed of a certain complex lead-zinc ore, the ore has a high oxidation rate of zinc minerals (~ 15%), is severely slimed, and is closely associated with pyrite and gangue, and is a refractory ore. The zinc grade of the raw ore is 4.5%.

[0034] 2. Flotation process: a closed-circuit flotation process of "one roughing, three cleaning, and two scavenging" is used.

[0035] 3. Reagent system: Activator: the activators prepared in Examples 1, 2, and 3, and the reagents prepared in Comparative Examples 1, 2, 3, and 4 are used respectively. The addition amount of all activators is converted to equivalent Cu 2+ .

[0036] Collector: butyl xanthate, with an addition amount of 80 g / t.

[0037] Frother: pine oil, with an addition amount of 30 g / t.

[0038] pH adjuster: lime, used to adjust the pH value of the ore slurry to 9.0-9.5.

[0039] 4. Evaluation index: grade (%) and zinc recovery rate (%) of the final zinc concentrate.

[0040] Test results and analysis:

[0041] Result analysis: Three groups of examples (1, 2, 3) using the activator of the present application all achieved excellent sorting indexes. Among them, example 3 achieved the best effect, with a zinc concentrate grade of 58.5% and a recovery rate of 91.6%, significantly better than the comparative group. This shows that the formula and process of the present application have very strong activation capacity and excellent selectivity for complex and difficult-to-select zinc ores.

[0042] The recovery rate of Comparative Example 1 decreased significantly (-7.3%), indicating that the two components of nano jade powder and alginic acid play a key synergistic role in improving the slurry environment, dispersing reagents, and enhancing mineral surface modification, and are indispensable.

[0043] The recovery rate of Comparative Example 2 decreased most significantly (-8.9%), proving that the combination of ammonium chloride and basic copper carbonate is the core of the present application. Ammonium ions form a complex environment with copper ions, achieving a more gentle, more durable, and more efficient activation process, avoiding the problem of poor selectivity caused by the instantaneous strong adsorption of copper sulfate.

[0044] Although the effect of Comparative Example 3 is slightly better than that of traditional copper sulfate, it is far inferior to the present application. This proves that the advantage of the present application does not simply come from the superposition of the functions of each component, but from the unique synergistic effect between the basic copper carbonate-ammonium chloride system and other components such as nano jade powder, alginic acid, etc.

[0045] The effect of Comparative Example 4 decreased significantly, proving that specific process conditions such as heating at 60-65°C and high-speed stirring at 2000-2500 revolutions per minute are key to ensuring that each component reacts fully, disperses uniformly, and ultimately forms a composite system with high activity and stability. The excellent effect of the present application cannot be achieved without following this process.

[0046] Test Example 2 Mineral sample: Low-grade chalcopyrite slurry as the treatment object (original ore copper grade 1.2%, slurry concentration 30%), the following beneficiation conditions were uniformly adopted: slurry pH value adjustment: adjusted to 8.0 with sodium carbonate; Activator dosage: 100 g / ton of ore; Collector: sodium hydrocarbyl sulfate, dosage 50 g / ton of ore; Frother: pine oil, dosage 20 g / ton of ore; Flotation equipment: XFD-1.5L single-tank flotation machine; Flotation parameters: stirring speed 1200 revolutions per minute, flotation time 15 minutes; Detection index: chalcopyrite concentrate grade (Cu%), chalcopyrite recovery rate (%).

[0047] 2. Test results:

[0048] Result analysis: The chalcopyrite concentrate grade of examples 1-3 are all over 28.5%, and the recovery rate is over 89.2%, among which example 3 (the optimal formula) performs best, the concentrate grade reaches 30.2%, and the recovery rate reaches 92.5%, which shows that the activator formula and preparation method can effectively improve the beneficiation index of low-grade chalcopyrite.

[0049] The concentrate grade of comparative example 1 (lack of nano jade powder and alginic acid), comparative example 2 (lack of ammonium chloride), and comparative example 3 (copper sulfate instead of basic copper carbonate and lack of ammonium chloride) are all less than 25%, and the recovery rate is less than 80%, which is far lower than example 3, proving that nano jade powder, alginic acid, ammonium chloride and basic copper carbonate-ammonium chloride composite system are the key to guarantee the activation effect.

[0050] The concentrate grade (21.3%) and recovery rate (72.1%) of comparative example 4 (S2 without heating and low stirring) are the lowest among all schemes, which shows that heating and appropriate stirring speed in the preparation process are crucial to the performance of the activator.

[0051] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A novel activator for sulfide ore dressing, characterized in that: The invention comprises, by weight, 1-2 parts of basic copper carbonate, 2-4 parts of ammonium chloride, 2-4 parts of nano jade powder, 2-3 parts of alginic acid, 1-2 parts of propenyl glycidyl ether, 2-3 parts of peregal O, 2-3 parts of sodium di-sec-octyl maleate sulfonate, 2-3 parts of vinyl acetate, 4-7 parts of hydrogen peroxide, 4-6 parts of disodium hydrogen phosphate and 40-50 parts of water.

2. A novel activator for sulfide ore dressing according to claim 1, characterized in that: The invention comprises, by weight, 1 part of basic copper carbonate, 3 parts of ammonium chloride, 3 parts of nano jade powder, 2.5 parts of alginic acid, 1.5 parts of propenyl glycidyl ether, 2.5 parts of peregal O, 2.5 parts of sodium di-sec-octyl maleate sulfonate, 2.5 parts of vinyl acetate, 5 parts of hydrogen peroxide, 5 parts of disodium hydrogen phosphate and 45 parts of water.

3. A novel activator for sulfide ore dressing according to claim 1, characterized in that: The particle size of the nano jade powder is less than 0.074 mm.

4. A novel activator for sulfide ore dressing according to claim 1, characterized in that: The alginic acid is natural alginic acid extracted from kelp.

5. A novel activator for sulfide ore dressing according to claim 1, characterized in that: The purity of the sodium di-secondary octyl maleate sulfonate is not less than 98%.

6. The method for preparing a novel sulfide ore dressing activator according to claim 1, wherein: The following steps are involved: S1. Evenly mix basic copper carbonate and ammonium chloride to obtain a first mixture; S2, mixing nano jade powder, alginic acid, allyl glycidyl ether, peregal O, sodium di-sec-octyl maleate sulfonate, vinyl acetate, hydrogen peroxide, disodium hydrogen phosphate and water, heating to 60-65° C., and stirring at 2000-2500 rpm for 40-50 minutes to obtain a second mixture; S3. Evenly mix the first mixture and the second mixture to obtain a novel sulfide ore dressing activator.

7. The method for preparing a novel sulfide ore dressing activator according to claim 6, characterized in that: In step S1, when mixing basic copper carbonate and ammonium chloride, the stirring speed is 800-1200 rpm and the stirring time is 10-15 minutes.

8. The method for preparing a novel sulfide ore dressing activator according to claim 6, characterized in that: In step S3, when mixing the first mixture and the second mixture, the stirring speed is 1500-2000 rpm and the stirring time is 20-30 minutes.

9. The method for preparing a novel sulfide ore dressing activator according to claim 6, wherein: The heating in step S2 is carried out in a water bath.

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