Medicament composition for beneficiation of lithium-tantalum-niobium polymetallic ore and beneficiation method

Abstract

The invention provides a reagent composition for beneficiation of lithium-tantalum-niobium polymetallic ore and a beneficiation method, and belongs to the technical field of beneficiation of lithium-tantalum-niobium ore. According to the composition for beneficiation of the lithium-tantalum-niobium polymetallic ore, provided by the invention, the desliming efficiency is greatly improved by precisely regulating and controlling the proportion of organic substances, namely the polyacrylamide compound, the polymeric chloride and the inorganic substances in the desliming agent; according to the flotation collecting agent, an amine compound, an organic acid substance and an organic sulfonate compound are compounded, the proportion is precisely regulated and controlled, the flotation collecting agent is used for the lithium-tantalum-niobium polymetallic ore beneficiation method of non-magnetic gangue magnetic separation and pre-removal-lithium ore flotation separation-tantalum-niobium ore reselection and enrichment, and quality improvement and efficiency improvement in the flotation process are achieved. The reagent composition is combined with a beneficiation method to be applied to beneficiation of the lithium-tantalum-niobium polymetallic ore, the beneficiation efficiency is improved, and the beneficiation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium tantalum niobium ore dressing, and in particular to a lithium tantalum niobium polymetallic ore dressing agent composition and a dressing method. Background Art

[0002] Lithium is an important mineral resource, used in batteries, aerospace, chemicals, medicine and other fields. With the rapid development of the new energy industry, the global demand for lithium and the intensity of its development are increasing.

[0003] Tantalum and niobium are rare metals with good properties such as high melting point, boiling point, and corrosion resistance. They are widely used in the fields of petroleum, chemical industry, aerospace, etc. Tantalum and niobium resources are abundant, but most tantalum and niobium ores are associated with other metals and the grade is generally not high. At the same time, the characteristics of mineral resources in different regions are different. Therefore, targeted research is needed to achieve efficient recovery of different minerals and maximize resource utilization.

[0004] There are a large number of lithium-tantalum-niobium co-existing polymetallic ores in some areas, but their composition is complex, making comprehensive utilization difficult and inefficient. The main components of lithium-tantalum-niobium polymetallic ores are lepidolite, tantalum-niobium iron ore, fine quartz, cassiterite, quartz, feldspar, etc. The existing process flow is difficult to achieve efficient separation, enrichment and recovery of various valuable minerals. Summary of the invention

[0005] The purpose of the present invention is to provide a reagent composition for beneficiation of lithium tantalum niobium polymetallic ore and a beneficiation method, thereby improving the comprehensive resource utilization rate of lithium tantalum niobium polymetallic ore.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a reagent composition for beneficiation of lithium-tantalum-niobium polymetallic ores, comprising a desludging reagent and a flotation collector which are packaged independently;

[0008] The desludging agent includes polyacrylamide compounds, polychloride and inorganic substances;

[0009] The ratio of the total mass of the polyacrylamide compound and the polychloride to the mass of the inorganic substance is 1 to 10:1, and the mass ratio of the polyacrylamide compound to the polychloride is 1:1 to 5;

[0010] The flotation collector includes amine compounds, organic acid compounds and organic sulfonate compounds;

[0011] The mass ratio of the amine compound, the organic acid compound and the organic sulfonate compound is 1-10:1-10:1-3.

[0012] Preferably, the polyacrylamide compound includes cationic polyacrylamide, anionic polyacrylamide or nonionic polyacrylamide; the polychloride includes polyaluminum chloride or polyferric chloride; and the inorganic substance includes ferric chloride, aluminum hydroxide, ferric hydroxide or lime.

[0013] Preferably, the amine compound includes dodecylamine or coconut amine; the organic acid compound includes oleic acid, chlorooleic acid, p-aminobenzenesulfonic acid, p-toluenesulfonic acid or benzenesulfonic acid; the organic sulfonate compound includes sodium lauroyl isethionate, sodium dodecylbenzenesulfonate, methyl methanesulfonate, ethyl methanesulfonate, methyl benzenesulfonate, ethyl benzenesulfonate, p-toluenesulfonate, isopropyl methanesulfonate or n-butyl methanesulfonate.

[0014] The present invention provides a ore dressing method based on the above-mentioned lithium tantalum niobium polymetallic ore dressing agent composition, comprising the following steps:

[0015] The lithium-tantalum-niobium polymetallic ore is crushed, ground and subjected to a first magnetic separation in sequence to obtain a magnetic separation concentrate;

[0016] regrinding the magnetically separated concentrate to obtain a fine ore sample;

[0017] The fine ore sample is mixed with the above-mentioned desliming agent to carry out desliming treatment to obtain a deslimed fine-grained product and a deslimed coarse-grained product;

[0018] The desludging fine-grained product is subjected to a second magnetic separation to obtain tantalum-niobium concentrate and tailings;

[0019] The deslimed coarse-grained product is subjected to flotation separation, wherein the closed-circuit process used for the flotation separation comprises roughing, first-stage cleaning, second-stage cleaning, first-stage scavenging and second-stage scavenging performed in sequence, and the collectors used for the first-stage scavenging and second-stage scavenging are the above-mentioned flotation collectors, to obtain lepidolite concentrate and flotation tailings rich in tantalum-niobium ore;

[0020] The flotation tailings rich in tantalum-niobium ore are subjected to gravity concentration to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and gravity concentration tailings.

[0021] Preferably, the magnetic field strengths of the first magnetic separation and the second magnetic separation are independently 0.6-1.2T.

[0022] Preferably, based on the mass of the lithium-tantalum-niobium polymetallic ore, the mass of the desludging agent is 50-200 g / t, the particle size of the desludging fine-grained product is ≤0.01 mm, and the particle size of the desludging coarse-grained product is 0.01-0.1 mm.

[0023] Preferably, the adjusting agent used in the first stage of concentration is sodium hexametaphosphate, and the mass of the sodium hexametaphosphate is 50-200 g / t based on the mass of the lithium tantalum niobium polymetallic ore.

[0024] Preferably, based on the mass of the lithium-tantalum-niobium polymetallic ore, the mass of the collector used in the first stage scavenging is 200-800 g / t; the mass of the collector used in the second stage scavenging is 100-400 g / t.

[0025] Preferably, the closed-circuit process used for the gravity concentration includes roughing, scavenging, primary cleaning and secondary cleaning performed in sequence.

[0026] Beneficial effects of the present invention:

[0027] The present invention proposes a mineral processing agent for lithium-tantalum-niobium polymetallic ores, wherein the desludging agent greatly improves the desludging efficiency by precisely controlling the ratio of organic substances polyacrylamide, polychloride and inorganic substances. Both polyacrylamide and polychloride are flocculants, which aggregate fine-grained minerals through flocculation to accelerate sedimentation, and inorganic substances can form positively charged colloids in the solution to neutralize the negative charge on the surface of suspended particles, reduce the repulsion between particles, or promote the flocculation process between particles through adsorption bridging and other effects; the flotation collector achieves quality and efficiency improvement of the flotation process by compounding organic sulfonate compounds with amine compounds and organic acid compounds and precisely controlling the ratio, wherein Organic sulfonate compounds and organic acids are negatively charged after ionization in solution, and are both anionic collectors, while amine compounds are positively charged after ionization in solution, and are cationic collectors. The two can work synergistically during the flotation process of lithium mica to enhance the surface hydrophobicity of lithium mica. The synergistic mechanism of the two is as follows: Under normal circumstances, lithium mica is floated in a neutral solution environment. At this time, the surface of lithium mica is negatively charged. Cationic collectors such as amine compounds can be directly adsorbed on the surface of lithium mica through electrostatic action, and then the anionic collectors are adsorbed with the amine compound agent molecules, or adsorbed on a small amount of positively charged areas on the surface of lithium mica, thereby enhancing the hydrophobicity of the lithium mica surface.

[0028] Aiming at the resource recovery and utilization of typical polymetallic complex ores, the present invention proposes a lithium tantalum niobium polymetallic ore beneficiation method of pre-removing non-magnetic gangue by magnetic separation-flotation separation of lithium ore-gravity selection and enrichment of tantalum niobium ore, which utilizes the unique flaky structure of lithium mica and the easy flotation characteristics after reacting with a collector, and first recovers the lithium mica as much as possible through flotation, avoiding the loss of lithium mica caused by too many pre-processes and improving the recovery rate of lithium mica. At the same time, tantalum and niobium are recovered through gravity selection and enrichment, which significantly improves the comprehensive utilization rate of lithium tantalum niobium polymetallic ore resources; in addition, the method removes most of the non-magnetic gangue in advance through magnetic separation, and simplifies the original lithium tantalum niobium ore beneficiation process (the original process is gravity selection followed by flotation, and the gravity selection slurry concentration is very low. It needs to be concentrated first during flotation, which increases the complexity of the process and is not conducive to actual production), thereby improving the beneficiation efficiency and reducing the beneficiation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flow chart of the lithium tantalum niobium polymetallic ore beneficiation method of the present invention, which includes pre-removal of non-magnetic gangue magnetic separation - separation of lithium ore by flotation - and re-selection and enrichment of tantalum niobium ore. DETAILED DESCRIPTION

[0030] The present invention provides a reagent composition for beneficiation of lithium-tantalum-niobium polymetallic ores, comprising a desludging reagent and a flotation collector which are packaged independently;

[0031] The desludging agent includes polyacrylamide compounds, polychloride and inorganic substances;

[0032] The ratio of the total mass of the polyacrylamide compound and the polychloride to the mass of the inorganic substance is 1 to 10:1, and the mass ratio of the polyacrylamide compound to the polychloride is 1:1 to 5;

[0033] The flotation collector includes amine compounds, organic acid compounds and organic sulfonate compounds;

[0034] The mass ratio of the amine compound, the organic acid compound and the organic sulfonate compound is 1-10:1-10:1-3.

[0035] In the present invention, unless otherwise specified, the required raw materials for preparation are all commercially available products well known to those skilled in the art.

[0036] In the present invention, the desludging agent preferably includes polyacrylamide compounds, polychlorides and inorganic substances. The polyacrylamide compounds preferably include cationic polyacrylamide, anionic polyacrylamide or nonionic polyacrylamide, and are further preferably cationic polyacrylamide or nonionic polyacrylamide; the polychlorides preferably include polyaluminum chloride or polyferric chloride, and are further preferably polyaluminum chloride; the inorganic substances preferably include ferric chloride, aluminum hydroxide, ferric hydroxide or lime, and are further preferably ferric chloride, aluminum hydroxide or ferric hydroxide, and are more preferably aluminum hydroxide or ferric hydroxide.

[0037] In the present invention, the ratio of the total mass of the polyacrylamide compound and the polychloride to the mass of the inorganic substance is preferably 1-10:1, more preferably 2-9:1, and more preferably 4-9:1; the mass ratio of the polyacrylamide and the polychloride is preferably 1:1-5, more preferably 1:1-4, and more preferably 1:2-3.

[0038] The present invention has no special limitation on the preparation of the desludging agent, and physical mixing can be performed according to a preparation process well known in the art.

[0039] In the present invention, the flotation collector preferably includes amine compounds, organic acid compounds and organic sulfonate compounds, the amine compounds preferably include dodecylamine or coconut amine, and more preferably dodecylamine; the organic acid compounds preferably include oleic acid, chlorinated oleic acid, p-aminobenzenesulfonic acid, p-toluenesulfonic acid or benzenesulfonic acid, and further preferably include oleic acid, chlorinated oleic acid, p-aminobenzenesulfonic acid or p-toluenesulfonic acid, and more preferably include oleic acid or chlorinated oleic acid; the organic sulfonate compounds preferably include sodium lauroyl isethionate, sodium dodecylbenzenesulfonate, methyl methanesulfonate, ethyl methanesulfonate, methyl benzenesulfonate, ethyl benzenesulfonate, p-toluenesulfonate, isopropyl methanesulfonate or n-butyl methanesulfonate, and further preferably include sodium lauroyl isethionate, sodium dodecylbenzenesulfonate, p-toluenesulfonate or isopropyl methanesulfonate, and more preferably include sodium lauroyl isethionate or p-toluenesulfonate.

[0040] In the present invention, the mass ratio of the amine compound, the organic acid compound and the organic sulfonate compound is preferably 1-10:1-10:1-3, more preferably 3-5:3-5:1, and more preferably 4-5:4-5:1.

[0041] The present invention has no special limitation on the preparation of the flotation collector, and physical mixing can be performed according to the preparation process well known in the art.

[0042] The present invention provides a ore dressing method based on the above-mentioned lithium tantalum niobium polymetallic ore dressing agent composition, comprising the following steps:

[0043] The lithium-tantalum-niobium polymetallic ore is crushed, ground and subjected to a first magnetic separation in sequence to obtain a magnetic separation concentrate;

[0044] regrinding the magnetically separated concentrate to obtain a fine ore sample;

[0045] The fine ore sample is mixed with the above-mentioned desliming agent to carry out desliming treatment to obtain a deslimed fine-grained product and a deslimed coarse-grained product;

[0046] The desludging fine-grained product is subjected to a second magnetic separation to obtain tantalum-niobium concentrate and tailings;

[0047] The desludging coarse-grained product is subjected to flotation separation to obtain lepidolite concentrate and flotation tailings rich in tantalum-niobium ore; the closed-circuit process used for the flotation separation includes roughing, first-stage cleaning, second-stage cleaning, first-stage scavenging and second-stage scavenging in sequence, and the collector used for the first-stage scavenging and second-stage scavenging is the above-mentioned flotation collector;

[0048] The flotation tailings rich in tantalum-niobium ore are subjected to gravity concentration to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and gravity concentration tailings.

[0049] The present invention preferably grinds the lithium tantalum niobium polymetallic ore after crushing, and performs the first magnetic separation on the ore sample with a particle size not higher than 0.5 mm. The magnetic product obtained is a magnetic concentrate (including the ore sample of lithium tantalum niobium polymetallic), and the non-magnetic product obtained is a magnetic tailing, which includes quartz and feldspar. The present invention does not limit the crushing equipment, and a jaw crusher or a double-roll crusher can be used; the present invention does not limit the grinding process, and a ball mill or a rod mill can be used; the present invention does not limit the shape and ratio of the grinding medium, the grinding time, the solid-liquid ratio, and the filling rate. After grinding, the ore sample of the desired particle size can be obtained.

[0050] In the present invention, the particle size of the ore sample after grinding is preferably not higher than 0.5 mm, and more preferably 0.3 mm.

[0051] In the present invention, the magnetic separation equipment for the first magnetic separation is preferably a high gradient magnetic separator, and the magnetic field strength is preferably 0.6 to 1.2T, and more preferably 0.6 to 1.0T.

[0052] The present invention preferably regrinds the magnetically separated concentrate to obtain a fine ore sample; in the present invention, the regrinding specifically comprises grinding the fine ore sample again by ball milling, and the ball milling medium is preferably a steel ball; the fine ore sample is preferably an ore sample with a particle size not higher than 0.1 mm.

[0053] The present invention preferably mixes the fine ore sample with the above-mentioned desliming agent to carry out desliming treatment to obtain a deslimed coarse-grained product and a deslimed fine-grained product; in the present invention, based on the mass of the lithium tantalum niobium polymetallic ore, the mass of the desliming agent is preferably 50-200 g / t, and more preferably 100 g / t; the particle size of the deslimed fine-grained product is preferably ≤0.01 mm, and the particle size of the deslimed coarse-grained product is preferably 0.01-0.1 mm.

[0054] The present invention preferably subjects the desludging fine-grained product to a second magnetic separation to obtain tantalum-niobium concentrate and tailings; in the present invention, the magnetic separation equipment for the second magnetic separation is preferably a high gradient magnetic separator, and the magnetic field strength is preferably 0.6 to 1.2 T, and further preferably 0.6 to 1.0 T.

[0055] The present invention preferably performs flotation separation on the desludging coarse-grained product to obtain lepidolite concentrate and flotation tailings rich in tantalum-niobium ore; the closed-circuit process used for the flotation separation is preferably "one roughing, two finishing, and two scavenging", namely, roughing, one-stage finishing, two-stage finishing, one-stage scavenging and two-stage scavenging; using two-stage finishing can obtain a higher concentrate grade, and two-stage scavenging is to ensure the recovery rate of lepidolite.

[0056] In the present invention, the closed-circuit process used for flotation separation is specifically:

[0057] Roughing the desludging coarse-grained product to obtain a roughing concentrate and a roughing tailing;

[0058] Performing a first-stage concentration on the rougher concentrate to obtain a first-stage concentrated concentrate and a first-stage concentrated tailings;

[0059] Performing a first-stage scavenging on the rougher tailings to obtain a first-stage scavenging concentrate and a first-stage scavenging tailings;

[0060] The first stage of concentrated tailings and the first stage of scavenged concentrate are combined and returned to the roughing to form a closed circuit;

[0061] The first-stage concentrated concentrate is subjected to second-stage concentration to obtain lepidolite concentrate and second-stage concentrated tailings;

[0062] The first stage scavenging tailings are subjected to second stage scavenging to obtain second stage scavenging concentrate and tantalum-niobium-rich flotation tailings;

[0063] The tailings from the second stage of concentration are returned to the first stage of concentration, and the concentrates from the second stage of scavenging are returned to the first stage of scavenging to form a closed circuit.

[0064] In the present invention, the adjusting agent used in the roughing is preferably sodium hexametaphosphate, and the mass of the sodium hexametaphosphate is preferably 160g / t based on the mass of the lithium tantalum niobium polymetallic ore. The collector used is preferably the above-mentioned flotation collector, and the mass is preferably 750g / t based on the mass of the lithium tantalum niobium polymetallic ore.

[0065] In the present invention, the adjusting agent used in the first stage of concentration is preferably sodium hexametaphosphate, and its mass is preferably 50-200 g / t, and more preferably 80 g / t, based on the mass of the lithium tantalum niobium polymetallic ore.

[0066] In the present invention, the collector used in the first stage scavenging and the second stage scavenging is preferably the above-mentioned flotation collector; based on the mass of the lithium tantalum niobium polymetallic ore, the mass of the collector used in the first stage scavenging is preferably 200-800 g / t, more preferably 400 g / t, and the mass of the collector used in the second stage scavenging is preferably 100-400 g / t, more preferably 200 g / t.

[0067] The present invention preferably conducts gravity concentration enrichment on the flotation tailings of the tantalum-niobium ore to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and gravity concentration tailings.

[0068] In the present invention, the gravity separation equipment is preferably a shaking table; the gravity separation closed-circuit process is preferably "one roughing, one sweeping and two concentrating", namely, roughing, sweeping, one-stage concentrating and two-stage concentrating. Sweeping can recover tantalum and niobium from roughing ore to improve the recovery rate, while two-stage concentrating can obtain tantalum and niobium concentrate with higher grade; the gravity separation closed-circuit process is specifically as follows:

[0069] Rough separation is performed on the flotation tailings rich in tantalum-niobium ore to obtain rougher concentrate, rougher ore and rougher tailings;

[0070] The roughing ore is scavenged to obtain scavenged concentrate and scavenged tailings;

[0071] The rougher concentrate and the scavenger concentrate are combined to perform a first-stage concentration to obtain a first-stage concentrated concentrate, a first-stage concentrated middling ore and a first-stage concentrated tailings. The first-stage concentrated concentrate, the rougher tailings and the scavenger tailings are combined to form a gravity separation tailings.

[0072] The first-stage concentrated concentrate is subjected to second-stage concentration to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and second-stage concentrated tailings. The first-stage concentrated middling ore and the second-stage concentrated tailings are combined into tantalum-niobium middling ore and returned to the first-stage concentration to form a closed circuit.

[0073] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0074] Example 1

[0075] A lithium-tantalum-niobium ore produced in Jiangxi was crushed and ground, and the ore sample with a particle size of <0.3mm was subjected to the first magnetic separation with a magnetic field intensity of 1.0T. The magnetic product obtained was the magnetic separation concentrate, and the non-magnetic product was the magnetic separation tailings.

[0076] The magnetic concentrate is re-grinded to obtain a fine ore sample with a particle size of <0.1 mm;

[0077] The fine ore sample is mixed with a desliming agent, the mass of the desliming agent is 100 g / t based on the mass of the lithium tantalum niobium polymetallic ore, and the desliming agent is composed of cationic polyacrylamide, polyaluminum chloride and aluminum hydroxide in a mass ratio of 2:7:1, and a desliming treatment is performed to obtain a desliming fine-grained product with a particle size of <0.01 mm and a desliming coarse-grained product with a particle size of 0.01 to 0.1 mm;

[0078] The desludging fine-grained product is subjected to a second magnetic separation with a magnetic field strength of 1.0 T. The magnetic product obtained is tantalum-niobium concentrate, and the non-magnetic product is fine mud tailings.

[0079] The deslimed coarse-grained product is subjected to flotation separation, and the closed-circuit process includes roughing, primary cleaning, secondary cleaning, primary scavenging and secondary scavenging in sequence:

[0080] Firstly, the deslimed coarse-grained product is subjected to roughing, wherein the roughing adjusting agent is sodium hexametaphosphate, and the mass is 160 g / t based on the mass of the lithium tantalum niobium polymetallic ore, and the collector is a flotation collector, and the mass is 750 g / t, and the flotation collector is composed of dodecylamine, chlorinated oleic acid, and sodium lauroyl isethionate in a ratio of 4:5:1, to obtain a roughing concentrate and a roughing tailing;

[0081] The rougher concentrate is subjected to a first-stage concentration, and the adjusting agent is sodium hexametaphosphate, and the mass is 80g / t based on the mass of the lithium tantalum niobium polymetallic ore, to obtain a first-stage concentrated concentrate and a first-stage scavenging tailings; the first-stage concentrated concentrate is subjected to a second-stage concentration to obtain a lithium mica concentrate and a second-stage concentrated tailings, and the second-stage concentrated tailings are returned to the first-stage concentration to form a closed circuit; the rougher tailings are subjected to a first-stage scavenging, and the collector is a flotation collector, and the mass is 400g / t based on the mass of the lithium tantalum niobium polymetallic ore, and the flotation collector is 100g / t. The collecting agent is composed of dodecylamine, chlorinated oleic acid, and sodium lauroyl isethionate in a ratio of 4:5:1, and a first-stage scavenging concentrate and a first-stage scavenging tailing are obtained. The first-stage scavenging concentrate and the first-stage concentrator tailing are combined and returned to the roughing to form a closed circuit; the first-stage scavenging tailing is subjected to a second-stage scavenging, and the collecting agent is a flotation collecting agent, and the mass is 200g / t based on the mass of the lithium tantalum niobium polymetallic ore, to obtain a second-stage scavenging concentrate and a flotation tailing rich in tantalum and niobium ore, and the second-stage scavenging concentrate is returned to the first-stage scavenging to form a closed circuit;

[0082] The flotation tailings rich in tantalum-niobium ore are subjected to gravity selection and enrichment, and the gravity selection closed-circuit process includes roughing, scavenging, one-stage concentration and two-stage concentration, specifically, the flotation tailings rich in tantalum-niobium ore are subjected to gravity selection to obtain roughing concentrate, roughing middling and roughing tailings; the roughing middling is subjected to scavenging to obtain scavenging concentrate and scavenging tailings; the roughing concentrate and the scavenging concentrate are combined to carry out one-stage concentration to obtain first-stage concentration concentrate, first-stage concentration middling and first-stage concentration tailings, and the first-stage concentration tailings are combined with the roughing tailings and the scavenging tailings to form gravity selection tailings; the first-stage concentration concentrate is subjected to two-stage concentration to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and second-stage concentration tailings, the first-stage concentration middling and the second-stage concentration tailings are combined into tantalum-niobium middling, which are returned to the first-stage concentration to form a closed circuit.

[0083] Example 2

[0084] The only difference from Example 1 is:

[0085] The desludging agent used is composed of cationic polyacrylamide, polyferric chloride and ferric hydroxide in a ratio of 2:7:1;

[0086] The flotation collector used was composed of dodecylamine, oleic acid, and p-toluenesulfonate in a ratio of 4:5:1;

[0087] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Example 2 were obtained.

[0088] Example 3

[0089] The only difference from Example 1 is:

[0090] The desludging agent used is composed of cationic polyacrylamide, polyaluminium chloride and aluminium hydroxide in a ratio of 3:5:2;

[0091] The flotation collector used was composed of dodecylamine, chlorinated oleic acid, and sodium lauroyl isethionate in a ratio of 5:4:1;

[0092] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Example 3 were obtained.

[0093] Example 4

[0094] The only difference from Example 1 is:

[0095] The desludging agent used is composed of nonionic polyacrylamide, polyaluminium chloride and aluminium hydroxide in a ratio of 2:7:1;

[0096] The flotation collector used was composed of dodecylamine, p-aminobenzenesulfonic acid, and sodium lauroyl isethionate in a ratio of 5:4:1;

[0097] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Example 4 were obtained.

[0098] Comparative Example 1

[0099] The only difference from Example 1 is:

[0100] The desludging agent used is composed of cationic polyacrylamide, polyaluminium chloride and aluminium hydroxide in a ratio of 2:2:6;

[0101] The flotation collector used was composed of dodecylamine, chlorinated oleic acid, and sodium lauroyl isethionate in a ratio of 2:2:6;

[0102] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Comparative Example 1 were obtained.

[0103] Comparative Example 2

[0104] The only difference from Example 1 is:

[0105] The desludging agent used is composed of cationic polyacrylamide, polyferric chloride and ferric hydroxide in a ratio of 0:5:5;

[0106] The flotation collector used was composed of dodecylamine, oleic acid, and p-toluenesulfonate in a ratio of 0:5:5;

[0107] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Comparative Example 2 were obtained.

[0108] Comparative Example 3

[0109] The only difference from Example 1 is:

[0110] The desludging agent used is composed of cationic polyacrylamide, polyaluminium chloride and aluminium hydroxide in a ratio of 5:5:0;

[0111] The flotation collector used was composed of dodecylamine, chlorinated oleic acid, and sodium lauroyl isethionate in a ratio of 5:5:0;

[0112] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Comparative Example 3 were obtained.

[0113] Comparative Example 4

[0114] The only difference from Example 1 is:

[0115] The desludging agent used is composed of nonionic polyacrylamide, polyaluminium chloride and aluminium hydroxide in a ratio of 5:5:0;

[0116] The flotation collector used was composed of dodecylamine, p-aminobenzenesulfonic acid, and sodium lauroyl isethionate in a ratio of 5:5:0;

[0117] The lithium mica concentrate, tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Comparative Example 4 were obtained.

[0118] Performance measurement

[0119] The grades and recoveries of the lithium mica concentrates, tantalum-niobium concentrates and tantalum-niobium secondary concentrates obtained in Examples 1 to 4 and Comparative Examples 1 to 4 were determined by the following method. The results are shown in Tables 1 and 2.

[0120] Determination method of Li2O grade in lepidolite concentrate: GB / T 14506.15-2010, flame atomic absorption spectrophotometry;

[0121] Determination method of Ta2O5 and Nb2O5 grade in tantalum-niobium concentrate and tantalum-niobium sub-concentrate: GB / T15076.1-2017, inductively coupled plasma atomic emission spectrometry;

[0122] Recovery rate: Calculate by conventional method.

[0123] Table 1 Grade and recovery of Li2O in lithium mica concentrates of Examples 1 to 4 and Comparative Examples 1 to 4

[0124] index grade / % Recovery rate / % Example 1 2.61 85.48 Example 2 2.52 86.42 Example 3 2.50 87.33 Example 4 2.58 85.97 Comparative Example 1 2.17 69.23 Comparative Example 2 2.30 65.37 Comparative Example 3 1.92 63.12 Comparative Example 4 1.89 62.15

[0125] Table 2 Grade and recovery rate of Ta2O5 and Nb2O5 in tantalum-niobium concentrate and tantalum-niobium secondary concentrate of Examples 1 to 4 and Comparative Examples 1 to 4

[0126]

[0127]

[0128] It can be seen from Examples 1 to 4 and Comparative Examples 1 to 4 in combination with Tables 1 and 2 that the lithium tantalum niobium polymetallic ore dressing agent composition proposed in the present invention is applied to the lithium tantalum niobium polymetallic ore dressing process of "non-magnetic gangue magnetic separation pre-removal-lithium ore flotation separation-tantalum niobium ore gravity separation enrichment". By accurately controlling the components and ratios, the desludging efficiency can be greatly improved, the quality and efficiency of the flotation process can be improved, and the recovery rate of lithium mica (Li2O) can be significantly improved (not less than 85%). At the same time, tantalum niobium concentrate and tantalum niobium sub-concentrate products are obtained, the total recovery rate of Ta concentrate and sub-concentrate is not less than 35%, and the total recovery rate of Nb concentrate and sub-concentrate is not less than 45%, which significantly improves the comprehensive utilization rate of lithium tantalum niobium polymetallic ore resources.

[0129] It can be seen from Comparative Examples 1 to 4 in combination with Tables 1 and 2 that when the desludging agent and collector used are not the components and proportions specified in the present invention, the sorting and separation efficiency of the lithium tantalum niobium polymetallic ore is greatly reduced, the recovery rate of lithium mica (Li2O) is less than 70%, the total recovery rate of Ta concentrate and sub-concentrate is not higher than 20%, the total recovery rate of Nb concentrate and sub-concentrate is not higher than 30%, and the comprehensive utilization rate of lithium tantalum niobium polymetallic ore resources is low.

[0130] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lithium tantalum niobium polymetallic ore dressing agent composition, characterized in that: Including independently packaged desludging agents and flotation collectors; The desludging agent includes polyacrylamide compounds, polychloride and inorganic substances; The ratio of the total mass of the polyacrylamide compound and the polychloride to the mass of the inorganic substance is 1 to 10:1, and the mass ratio of the polyacrylamide compound to the polychloride is 1:1 to 5; The flotation collector includes amine compounds, organic acid compounds and organic sulfonate compounds; The mass ratio of the amine compound, the organic acid compound and the organic sulfonate compound is 1-10:1-10:1-3.

2. The lithium-tantalum-niobium polymetallic ore dressing agent composition according to claim 1, characterized in that: The polyacrylamide compound includes cationic polyacrylamide, anionic polyacrylamide or nonionic polyacrylamide; the polychloride includes polyaluminum chloride or polyferric chloride; the inorganic substance includes ferric chloride, aluminum hydroxide, ferric hydroxide or lime.

3. The lithium-tantalum-niobium polymetallic ore dressing agent composition according to claim 1, characterized in that: The amine compound includes dodecylamine or coconut amine; the organic acid compound includes oleic acid, chlorinated oleic acid, p-aminobenzenesulfonic acid, p-toluenesulfonic acid or benzenesulfonic acid; the organic sulfonate compound includes sodium lauroyl isethionate, sodium dodecylbenzenesulfonate, methyl methanesulfonate, ethyl methanesulfonate, methyl benzenesulfonate, ethyl benzenesulfonate, p-toluenesulfonate, isopropyl methanesulfonate or n-butyl methanesulfonate.

4. A method for beneficiation of lithium-tantalum-niobium polymetallic ores based on the reagent composition for beneficiation of lithium-tantalum-niobium polymetallic ores according to claims 1 to 3, characterized in that: The following steps are involved: The lithium-tantalum-niobium polymetallic ore is crushed, ground and subjected to a first magnetic separation in sequence to obtain a magnetic separation concentrate; regrinding the magnetically separated concentrate to obtain a fine ore sample; The fine ore sample is mixed with the desliming agent according to any one of claims 1 to 2, and desliming treatment is performed to obtain a deslimed fine-grained product and a deslimed coarse-grained product; The desludging fine-grained product is subjected to a second magnetic separation to obtain tantalum-niobium concentrate and tailings; The deslimed coarse-grained product is subjected to flotation separation to obtain lepidolite concentrate and flotation tailings rich in tantalum-niobium ore; the closed-circuit process used for the flotation separation includes roughing, first-stage cleaning, second-stage cleaning, first-stage scavenging and second-stage scavenging in sequence, and the collector used for the first-stage scavenging and second-stage scavenging is the flotation collector according to any one of claims 1 and 3; The flotation tailings rich in tantalum-niobium ore are subjected to gravity concentration to obtain tantalum-niobium concentrate, tantalum-niobium secondary concentrate and gravity concentration tailings.

5. The ore dressing method according to claim 4, characterized in that: The magnetic field strengths of the first magnetic separation and the second magnetic separation are independently 0.6 to 1.2 T.

6. The ore dressing method according to claim 4, characterized in that: Calculated based on the mass of the lithium-tantalum-niobium polymetallic ore, the mass of the desludging agent is 50-200 g / t, the particle size of the desludging fine-grained product is ≤0.01 mm, and the particle size of the desludging coarse-grained product is 0.01-0.1 mm.

7. The ore dressing method according to claim 4, characterized in that: The adjusting agent used in the first stage selection is sodium hexametaphosphate. Based on the mass of the lithium tantalum niobium polymetallic ore, the mass of the sodium hexametaphosphate is 50-200 g / t.

8. The ore dressing method according to claim 4, characterized in that: Calculated based on the mass of the lithium-tantalum-niobium polymetallic ore, the mass of the collector used in the first stage scavenging is 200-800 g / t; the mass of the collector used in the second stage scavenging is 100-400 g / t.

9. The ore dressing method according to claim 4, characterized in that: The closed-circuit process used in the gravity concentration includes roughing, scavenging, primary concentration and secondary concentration carried out in sequence.

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