Beneficiation method of micro-fine particle zinc oxide ore
Technical Field The invention belongs to the technical field of mineral processing, and in particular relates to a micro-fine particle zinc oxide ore dressing method. Background Art Zinc oxide ore mineral form a complex, ore except the zinc oxide minerals, comprising a plurality of carbonate minerals, quartz and silicate minerals and limonite, goethite and iron ore. Zinc oxide ore in its oxidation process to be produced in the ocher, extremely easy to slime, portions of the process is easy to form in a large number of the slime. The slime with quality and small particle size, surface energy characteristics, in the pulp is easy to form the agglomeration, and produce the phenomenon of the slime cover; in addition, the slime larger specific surface area, the surface of the relatively high solubility, it is extremely easy to in the pulp formed inevitably ion, impact concentrate grade. Processing support head easy to slime zinc oxide ore method mainly has the pre-desliming flotation and the addition of the dispersant mud flotation two method. Zinc oxide ore beneficiation process often produce a large number of primary and secondary sludge, pre-desliming flotation is to deal with the more serious oxide ore slime of an effective method, but in most grinding mineral composition, zinc oxide mineral in 0.01 mm the following extremely fine particle in the high share, desliming will cause the metal loss, the recovery rate of the impact. Therefore, the present study zinc oxide ore remains focused on all-flotation process. All-flotation zinc oxide ore commonly used dispersing agent is sodium hexametaphosphate, sodium silicate and Na2 CO3And the like, adding a single dispersing agent are often unable to play a role in inhibiting the role of the gangue and dispersed slime; amine collector is flotation zinc oxide mineral effective medicament, but because of its selective vulnerable to slime and slurry in the impact of the soluble salt, the resulting concentrate product index is not ideal. Content of the invention The purpose of this invention is to provide a micro-fine particle zinc oxide ore dressing method, the dressing method solves the problems in the flotation of all-poor outcome indicators, general applicability is poor. The purpose of this invention is realized through the following technical solution: A micro-fine particle zinc oxide ore dressing method, comprising the following steps: (1) zinc oxide ore crushing, grinding the ore to 0.074 mm the following grade accounts for 85% -95% between, zinc oxide ore grinding after the pulping, pulp mass percentage concentration in 25% -40% between; (2) according to step (1) by the solid mass in the pulp 1 ‰ - 2 ‰ are added dispersing agent, stirring 2 - 4min; (3) according to step (1) by the solid mass in the pulp 1 ‰ - 10 ‰ are added collecting agent emulsion, stirring 5 - 10min; the collecting agent emulsion is formed by the combination of the collector with the sodium sulfide to 1 - 5:100 mass proportions mixing, adding emulsifier heating and stirring into, wherein the mass ratio of sodium sulfide and emulsifier 100:1 - 2; the combined collector is composed of a dodecyl mixed amine, octadecyl mixed amine and active agent to 1:2: 0.1 - 0.2 mass ratio is mixed, adding organic solvent, alkaline material heating and stirring to dissolve, made after cooling, wherein the agent, organic solvent, alkaline material quality ratio of 1: 0.8 - 1: 0.05 - 0.08. (4) the conventional flotation process inflatable flotation, after a rougher, 2 - 5 times and preconcentration and 2 - 5 times selected, to obtain the final zinc oxide concentrate. In the step (2) the dispersing agent is sodium silicate, sodium hexametaphosphate and carboxymethyl cellulose in the one to three. In the step (3) the active agent is dodecyl ammonium sulfate or sodium dodecyl benzene sulfonate. In the step (3) wherein the organic solvent is ethanol, carbon tetrachloride or ethyl ether. In the step (3) the alkaline substance is sodium hydroxide or sodium carbonate. In the step (3) the emulsifying agent is sodium oleate or dodecyl ammonium chloride. The principle of this invention: compared with the zinc sulfide mineral surface, zinc oxide mineral surface polarity is relatively strong, mineral surface due to electrostatic attraction polarization forming aligned hydrated membrane, is hydrophilic state, through the collecting agent to the surface of the mineral hydrated membrane role. Sodium sulfide in the pulp solution mainly to HS- Ion and S2 - In the form of ion, HS- Ion is sodium sulfide activated zinc oxide mineral the main role of the ion, it can freely from the pulp through the hydration liquid phase adsorption to the mineral surface of the film, so that the water dipole molecules to the outer diffusion or disappear, compression or damage hydrated membrane, forming MeS metal sulfide, a collector with the zinc oxide mineral particles adsorbed on the surface of the media. Amine collector in flotation when zinc oxide ore, in order to molecular condition exists, with the Zn amine member2 + Ion generating complex, is chemically adsorbed on the surface of the solid mineral. Because the pulp in the presence of slime and soluble salt, causes the amine molecule with the gangue mineral cation exchanged adsorption, not only consume a large amount of amine collector, also reduces the selectivity of the collector, the influence of the quality of the ore concentrate product. The use of the combined collecting agent and the preparation of the emulsion, with the HS amine member- Ion to form a chelate compound, and the zinc oxide mineral surface of coadsorption, enhances the amine member adsorption selectivity and stability, under the action of the in cooperating with the dispersing agent, can realize all-flotation, desliming of reduced metal loss, the recovery rate is improved. The advantage of this invention is characterized in that the: collecting agent emulsion by adding combined collector with sodium sulfide to make the emulsion, can be [...] molecule in the zinc oxide mineral surface adsorption selectivity and stability; to coordinate the accession dispersing agent, can realize the mud of zinc oxide ore flotation, desliming of reduced metal loss, improve the recovery rate of zinc; the method the universal applicability of the strong, is not only suitable for calamine, zinc bloom flotation, to the calamine and willemite flotation index also has greatly improved, and the operation is simple, strong adaptability, dressing products have high index, and low production cost. Mode of execution The lower part of the embodiment of the present invention combination further described, but the scope of protection of the present invention is not limited to the content. Embodiment 1 In order to Yunnan tengchong a zinc oxide as the object of study, zinc in the original ore grade is 5.77%, grinding the mineral composition 0.043 mm grade the following products yield is 39.06%, the grain of the light level in the zinc is 26.01%. The specific implementation includes the following steps: (1) zinc oxide ore crushing, grinding the ore to 0.074 mm the following grade accounts for 85%, zinc oxide ore grinding after the pulping, pulp mass percentage concentration is 25%; (2) according to step (1) by the solid mass in the pulp 1 ‰ are added sodium silicate, stirring 3min; (3) according to step (1) by the solid mass in the pulp 10 ‰ are added collecting agent emulsion, stirring 5min; the collecting agent emulsion is formed by the combination of the collector with the sodium sulfide to 1:100 mass proportions mixing, adding oleic acid sodium heating and stirring to prepare, wherein sodium sulfide and sodium oleate quality than 100:1; the combined collector is composed of a dodecyl mixed amine, octadecyl mixed amine, dodecyl ammonium sulfate to 1:2: 0.1 mass ratio is mixed, adding ethanol, sodium hydroxide heating and stirring to dissolve, made after cooling, wherein the dodecyl ammonium sulfate, ethanol, sodium hydroxide and the mass ratio of 1: 0.8: 0.05. (4) after a rougher, the secondary choice, secondary scavenging closed the flotation procedure, to obtain the final zinc oxide concentrate. At the end of the zinc in the zinc oxide concentrate grade is 40.59%, recovery is 78.87%. Embodiment 2 This embodiment the treated ore to Guilin a zinc oxide ore, zinc in the original ore grade is 7.31%, grinding the mineral composition 0.043 mm grade the following products yield is 30.18%, the grain of the light level in the zinc is 22.30%. The specific implementation includes the following steps: (1) zinc oxide ore crushing, grinding the ore to 0.074 mm the following grade accounts for 90%, zinc oxide ore grinding after the pulping, pulp mass concentration is 30%; (2) according to step (1) in the pulp obtained by the solid mass 1.5 ‰ are added sodium silicate, sodium hexametaphosphate, stirring 2min; (3) according to step (1) in the pulp obtained by the solid mass 5 ‰ of the emulsion are added collecting agent, stirring 7min; the collecting agent emulsion is formed by the combination of the collector with the sodium sulfide to 3:100 mass proportions mixing, adding oleic acid sodium heating and stirring to prepare, wherein sodium sulfide and sodium oleate quality than 100: 1.5; the combined collector is composed of a dodecyl mixed amine, octadecyl mixed amine, sodium dodecyl benzene sulfonate to 1:2: 0.15 mass ratio is mixed, by adding sodium hydroxide, carbon tetrachloride heating and stirring to dissolve, made after cooling, wherein sodium dodecyl benzene, carbon tetrachloride, sodium hydroxide and the mass ratio of 1: 0.9: 0.06. (4) after a rougher, three times, five times and preconcentration closed the flotation procedure, to obtain the final zinc oxide concentrate. At the end of the zinc in the zinc oxide concentrate grade is 34.79%, recovery is 76.01%. Embodiment 3 In order to Yunnan shidian a zinc oxide ore as core sample, zinc in the original ore grade is 4.19%, grinding the mineral composition 0.043 mm grade the following products yield is 20.11%, zinc of the light to 18.07%. The specific implementation includes the following steps: (1) zinc oxide ore crushing, grinding the ore to 0.074 mm the following grade accounts for 95%, zinc oxide ore grinding after the pulping, pulp mass percentage concentration is 40%; (2) according to step (1) by the solid mass in the pulp 2 ‰ are added carboxymethyl cellulose, stirring 4min; (3) according to step (1) by the solid mass in the pulp 1 ‰ of the emulsion are added collecting agent, stirring 10min; the collecting agent emulsion is formed by the combination of the collector with the sodium sulfide to 5:100 mass proportions mixing, adding lauryl alkyl ammonium chloride heating and stirring to prepare, wherein sodium sulfide and dodecyl ammonium chloride quality than 100:2; the combined collector is composed of a dodecyl mixed amine, octadecyl mixed amine, sodium dodecyl benzene sulfonate to 1:2: 0.2 mass ratio is mixed, adding sodium carbonate, ethyl ether heating and stirring dissolved, made after cooling, wherein sodium dodecyl benzene, ethyl ether, sodium carbonate and the mass ratio of 1:1: 0.08. (4) after a rougher, the five selected, two scavenging closed the flotation procedure, to obtain the final zinc oxide concentrate. At the end of the zinc in the zinc oxide concentrate grade is 46.56%, recovery is 71.30%. The invention discloses a beneficiation method of micro-fine particle zinc oxide ore. The beneficiation method comprises the steps that the zinc oxide ore is firstly subjected to ore grinding and pulp mixing, a dispersing agent and collecting agent emulsion are added according to a certain mass proportion, a conventional flotation process is adopted for pneumatic flotation, and zinc oxide concentrates are obtained. The collecting agent emulsion is prepared by mixing a combined collecting agent and sodium sulphide, adding an emulgator and carrying out heating and stirring. The combined collecting agent is prepared by mixing dodecyl mixed amine, octadecyl mixed amine and an active agent, adding an organic solvent and alkaline matter to be heated, stirred and dissolved and then carrying out cooling. The collecting agent emulsion, namely, the emulsion prepared from the combined collecting agent and the sodium sulphide, is added, and therefore the selectivity and stability of amine molecules on zinc oxide ore surface adsorption can be enhanced; and the dispersing agent is added in a matched manner, and therefore all-slime flotation of the zinc oxide ore can be achieved, metal losses caused by desliming can be reduced, and the zinc recovery rate can be increased. The beneficiation method has the beneficial effects of being easy to operate, high in adaptability, good in beneficiation index and low in production cost. 1. A micro-fine particle zinc oxide ore dressing method, comprising the following steps: (1) zinc oxide ore crushing, grinding the ore to 0.074 mm the following grade accounts for 85% -95% between, zinc oxide ore grinding after the pulping, pulp mass percentage concentration in 25% -40% between; (2) according to step (1) by the solid mass in the pulp 1 ‰ - 2 ‰ are added dispersing agent, stirring 2 - 4min; (3) according to step (1) by the solid mass in the pulp 1 ‰ - 10 ‰ are added collecting agent emulsion, stirring 5 - 10min; the collecting agent emulsion is formed by the combination of the collector with the sodium sulfide to 1 - 5:100 mass proportions mixing, adding emulsifier heating and stirring into, wherein the mass ratio of sodium sulfide and emulsifier 100:1 - 2; the combined collector is composed of a dodecyl mixed amine, octadecyl mixed amine, active agent to 1:2: 0.1 - 0.2 mass ratio is mixed, adding organic solvent, alkaline material heating and stirring to dissolve, made after cooling, wherein the agent, organic solvent, alkaline material quality ratio of 1: 0.8 - 1: 0.05 - 0.08. (4) the conventional flotation process inflatable flotation, after a rougher, 2 - 5 times and preconcentration and 2 - 5 times selected, to obtain the final zinc oxide concentrate. 2. A micro-fine particle zinc oxide ore dressing method according to Claim 1, characterized in that step (2) the dispersing agent is sodium silicate, sodium hexametaphosphate and carboxymethyl cellulose in the one to three. 3. A micro-fine particle zinc oxide ore dressing method according to Claim 1, characterized in that step (3) the active agent is dodecyl ammonium sulfate or sodium dodecyl benzene sulfonate. 4. A micro-fine particle zinc oxide ore dressing method according to Claim 1, characterized in that step (3) wherein the organic solvent is ethanol, carbon tetrachloride or ethyl ether. 5. A micro-fine particle zinc oxide ore dressing method according to Claim 1, characterized in that step (3) the alkaline substance is sodium hydroxide or sodium carbonate. 6. A micro-fine particle zinc oxide ore dressing method according to Claim 1, characterized in that step (3) the emulsifying agent is sodium oleate or dodecyl ammonium chloride.