229 results about "Xanthate" patented technology

The invention discloses an efficient combined regulator for easily-argillized copper oxide cobalt ore and a beneficiation method. The efficient combined regulator comprises the following components in parts by weight: 250-350 parts of sodium citrate and 1100-1200 parts of sodium hydrosulfide. Sodium citrate has high dispersing capacity, and the efficiency of selective adsorption between the argillization copper-cobalt ore and the medicament can be improved; meanwhile, the complexing ability of sodium citrate on ions, such as Fe, Ca and Mg, influencing agent adsorption on the surface of the ore is high, in addition, products obtained after complexing of the Fe, Ca and Mg ions can be dissolved in water, and action sites are provided for selective adsorption of a vulcanizing agent (NaHS) and a collecting agent amyl xanthate (PAX). According to the combined regulator and the beneficiation method provided by the invention, the problem of poor reagent selectivity in the flotation process of the argillization copper-cobalt ore can be obviously improved, the vulcanization effect of a vulcanizing agent is enhanced, and selective adsorption of a collecting agent is promoted, so that the recovery rate of copper and cobalt metals in the copper-cobalt oxide ore under the condition of serious ore argillization is improved.

The invention relates to a preparation method and application of a Ce / black TiO2 / sepiolite composite photocatalyst. According to the method, a one-step solvothermal method is adopted, Ti < 3 + > is introduced to the surface of white TiO2 in a self-doping mode to obtain black TiO2 with higher visible light response activity, meanwhile, Ce doping is performed on the black TiO2 in the reaction process, a carrier sepiolite mineral material is introduced, and therefore the novel Ce / black TiO2 / sepiolite composite photocatalyst different from the disclosed novel Ce / black TiO2 / sepiolite composite photocatalyst is prepared. The prepared composite photocatalyst is high in visible light utilization rate and good in degradation performance, and the effect of degrading residual xanthate in beneficiation wastewater is remarkable.

The invention provides a beneficiation method for high-sulfur copper ore containing mud and pyrrhotite, and belongs to the technical field of ore separation processes. According to the method, the mineral processing technology of copper rapid flotation, enhanced flotation, copper rough concentrate differential regrinding, step-by-step concentration, copper tail sulfur flotation and sulfur tail magnetic separation and a CD-ND + CD-SD combined inhibitor are adopted for synchronously inhibiting argillaceous gangue and pyrite, ethionine ester, isopropyl xanthate and ethionine xanthate collect copper minerals step by step, interference of the argillaceous gangue to the preferential copper flotation process is reduced, and the copper flotation efficiency is improved. The effective inhibition on sulfur is realized under the condition of relatively low pH. The copper and sulfur separation technical scheme combining low-alkali-acid-free flotation and magnetic flotation is constructed, interference of argillaceous gangue on the sulfide ore flotation process is reasonably and effectively controlled, the technological process is short and stable, the copper and sulfur separation index is excellent, the copper and sulfur ore separation recovery rate and grade index are improved, and the method is suitable for industrial production. The method effectively solves the problem of clean and efficient beneficiation and recovery of high-sulfur copper ore containing mud pyrrhotite, and provides a new effective method for clean and efficient recovery of similar copper and sulfur resources.

The invention provides a low-molecular soluble chelating collector as well as a preparation method and application thereof, and belongs to the technical field of mineral processing. According to the collecting agent, low-molecular-weight ethylene glycol terephthalate serves as a precursor, and isosorbide is introduced for a copolymerization reaction; glutamic acid is introduced as a branched chain unit, and the branching degree and reaction active site density of the molecular structure are remarkably improved by utilizing the polyfunctional group characteristic of glutamic acid. A rigid ring structure and an ether bond of the isosorbide endow the medicament with good water solubility and dispersity, and invalid curling of a macromolecular chain is avoided; the introduction of glutamic acid branched chains greatly increases the number of hydroxyl groups and amino groups capable of reacting with carbon disulfide, so that each molecule carries more xanthate groups, and the adsorption stability and coverage density of the molecule on the surface of arsenopyrite are enhanced. By means of the structure, xanthate functional groups are fully exposed, multi-tooth chelation is easily conducted on the xanthate functional groups and iron and arsenic ions on the surface of arsenopyrite, a strong hydrophobic surface layer is formed, and therefore the collecting selectivity is remarkably improved.

The invention discloses a method for simulating reaction migration of metal in a xanthate-loaded porous medium. On the basis of a coupling reaction mechanism of metal and an organic complexing agent (xanthogenate) in a porous medium, a multi-surface morphology complexing model (MSM) containing soil native components and xanthogenate is constructed and is combined with a reactive migration numerical model (a coupling water flow and solute migration equation); according to the method, through model calibration and experimental verification, the dynamic migration process of each metal component and the competitive retention distribution of the metal component on different solid-phase components can be accurately simulated and quantitatively analyzed under the complex condition that metal and xanthate coexist.

The present invention relates to the field of xanthate drying control, and more specifically, to a method and device for energy-saving control of a drying tower for xanthate production. The method first obtains the energy consumption coefficient of each historical drying process based on the temperature and energy consumption data of a heating device in a control device at different time periods during each historical drying process. The drying efficiency of each historical drying process is then determined by combining the differences in material moisture data and material weight data before and after each historical drying process, as well as the energy consumption coefficient. Historical drying processes with the same material moisture data and weight data before and after the drying process are classified into the same category. Reference temperature data for different reference time periods is selected from each category. Energy-saving control is then performed on the material drying process during the current drying process based on the reference temperature data for different reference time periods across all categories. The present invention maintains reasonable energy consumption while ensuring a good drying effect.

The utility model relates to a horizontal fluidized bed drying machine for xanthate production, and belongs to the technical field of drying machines, the horizontal fluidized bed drying machine comprises a drying machine main body, an exhaust pipe is fixed on the upper surface of the drying machine main body, and an induced draft fan is fixed on one side, far away from the drying machine main body, of the exhaust pipe. According to the horizontal fluidized bed drying machine for xanthate production, materials are fed into the drying machine body from the feeding hopper, hot air is fed into the drying machine body through the air feeder, the materials are subjected to fluidized drying in the hot air, the dried air is exhausted through the exhaust pipe, the induced draft fan and the heat exchanger conduct heat recovery, and the motor drives the worm, the worm gear, the two-way screw, the toothed plate, the gear and the threaded rod to rotate. The movable block, the connecting rod, the rotating rod and the shifting plate move left and right, materials are evenly distributed on the net plate, it is ensured that the materials make full contact with hot air, the drying effect is improved, it is ensured that the materials are evenly distributed and make full contact with the hot air, the drying efficiency is improved, energy consumption is reduced, the product quality is ensured, and the market competitiveness is improved.

The invention discloses a method for preparing viscose fiber from alkali-soaked hemicellulose, and relates to the technical field of viscose fiber production and preparation, and the method comprises the following steps: sequentially carrying out multi-stage filtration and twice nanofiltration membrane filtration on alkali liquor squeezed from slurry porridge, and separating out high-concentration hemicellulose alkali liquor; after cellulose xanthate is generated through a xanthating machine reaction, high-concentration hemicellulose alkali liquor is added into the xanthating machine to be subjected to a xanthating reaction, and hemicellulose xanthate is generated; and adding dilute alkali liquor into the xanthating machine for dissolving, and sequentially filtering, defoaming and spinning to prepare the viscose fiber. After alkali cellulose and carbon disulfide are subjected to a yellowing reaction, high-concentration hemicellulose alkali liquor is added into a yellowing machine for secondary yellowing, then two xanthate esters are dissolved with dilute alkali liquor, and subsequent filtering, defoaming and spinning procedures are performed, so that full utilization of hemicellulose is realized, and the quality and spinnability of viscose fibers are guaranteed; meanwhile, pulp unit consumption and new alkali consumption are reduced, and the production cost is saved.

The invention relates to the field of xanthate drying control, in particular to a drying tower energy-saving control method for xanthate production and a control device thereof. The method comprises the following steps: firstly, obtaining an energy consumption coefficient of each historical drying process according to temperature data and energy consumption data of a heating device in a control device in different time periods in each historical drying process, and combining a material humidity data difference, a material weight data difference and the energy consumption coefficient before and after each historical drying process; the drying efficiency of each historical drying process is obtained, the historical drying processes with the same material humidity data and the same material weight data before the historical drying processes are classified into the same category, and reference temperature data of different reference time periods are selected from each category; and performing energy-saving control on material drying in the current drying process according to the reference temperature data of different reference time periods in all categories. Reasonable energy consumption can be maintained while the drying effect is guaranteed.

The invention belongs to the technical field of mineral flotation, and particularly discloses a xanthate collecting agent and a preparation method and application thereof, and the xanthate collecting agent is obtained by taking ether alcohol, carbon disulfide and caustic alkali as raw materials to react; the xanthate collecting agent is selected from at least one of formulas I-VI. The xanthate collecting agent has the advantages of being free of peculiar smell, easy to degrade, high in yield, high in purity, efficient in mineral flotation and the like, the working environment of the xanthate collecting agent in the production and using process can be effectively improved, operation is easy and convenient, cost is low, and industrial production is easy to achieve.

The invention provides a preparation method and application of a modified PVC adsorbent for gold extraction of carbonaceous gold ore, and belongs to the technical field of organic polymer materials and resource utilization. Based on construction of a hydroxylation-xanthate esterification reaction and bifunctional adsorption sites, a series of chemical modification paths of acetate nucleophilic substitution-hydrolysis-carbon disulfide alkali treatment are established, and xanthate functional groups with high reaction activity are accurately constructed on an inert PVC framework. Sulfur atoms in xanthate groups of the modified PVC are excellent electron donors and can generate strong chemical adsorption with metal impurities or polar sites on the surface of carbon, meanwhile, Van der Waals interaction between a main chain of the modified PVC and the carbon is reserved, and unmodified PVC or single hydroxylated PVC does not have the synergism of chemical adsorption and physical adsorption, so that the modified PVC can be used for preparing the carbon-modified PVC composite material, and the carbon-modified PVC composite material can be used for preparing the carbon-modified PVC composite material. And leap-type improvement of the adsorption capacity and selectivity of organic carbonaceous in minerals is realized.

The invention provides a lithium slag flotation desulfurization method, a ceramic tile doped with lithium slag and a preparation method of the ceramic tile, and the method comprises the following steps: controlling the particle size of the lithium slag to be treated within a preset particle size range, adding water into the lithium slag, and blending into ore pulp with preset solid content; sodium dodecyl sulfate and xanthate serve as collecting agents to be added into the ore pulp, sodium silicate serves as an inhibitor to be added into the ore pulp, and sodium carbonate is adopted to adjust the pH of the ore pulp to be within the preset pH range; and stirring the ore pulp of which the pH is adjusted to obtain desulfurized lithium slag concentrate, and dehydrating and drying the desulfurized lithium slag concentrate to obtain flotation lithium slag. Through complementation of chemical adsorption and physical adsorption, charge regulation and control and reinforcement of the hydrophobic layer, efficient selective separation of sulfide is realized, the addition proportion of a dispergator when the lithium slag is applied to wet ball milling of the ceramic billet is greatly reduced, the slurry performance of the lithium slag billet is remarkably improved, the cost is low, and the desulfurization effect is good.

The present disclosure provides reagents and methods useful for single-molecule sequencing of proteins through use of a unique sequencing reagent comprising a xanthate group. The reagents and methods described herein provide for high-throughput single-molecule peptide and protein sequencing in mild conditions allowing for high resolution investigation of the complex biological systems.

The invention discloses an efficient combined collecting agent for copper cobalt oxide ore under a high-magnesium backwater system and a beneficiation method, and the efficient combined collecting agent comprises the following components in parts by weight: 200-300 parts of sulfosalicylic acid, 650-900 parts of ammonium dibutyl dithiophosphate and 650-900 parts of butyl xanthate. By means of the efficient combined collecting agent for the copper oxide cobalt ore and the beneficiation method, the foaming performance of the copper oxide cobalt ore in the flotation process under a high-magnesium backwater system can be improved, and meanwhile the recovery rate of copper and cobalt metal in the copper oxide cobalt ore concentrate can be obviously increased.

The present invention relates to a high-efficiency flotation separation method for complex copper-iron sulfide ore, and belongs to the technical field of flotation reagents. A combined collector is prepared, wherein the components of the combined collector are composed of 75-80 parts of aminotrimethylenephosphonic acid, 10-15 parts of xanthate, 5-10 parts of ethylthiocarbamate, and 0.5-1 part of polyol fatty acid ester, and the mass concentration of the combined collector is 30-50%; pulping, adding 200-800g / t of sulfiding agent to the complex copper-iron sulfide ore, grinding the ore to a fineness of -0.074mm accounting for 65-90%, and then pulping to a slurry with a solid concentration of 25-40wt%; flotation, subjecting the slurry with a solid concentration of 25-40wt% to a flotation operation of one coarse, three-four fine, and two-three sweeps to obtain copper concentrate and sulfur tailings, wherein the combined collector is used in the flotation process of the one coarse, three-four fine, and two-three sweeps. The present invention develops a new type of combined collector as a flotation agent for efficiently separating chalcopyrite and pyrite minerals, thereby achieving excellent flotation separation effect of complex copper-iron sulfide minerals in a slurry under low-alkali conditions.

The present invention discloses a step-by-step enhanced recovery method for recovering multiple complex copper ores. The method includes grinding the sample to an appropriate particle size, then directly flotating copper sulfide using amyl xanthate. The tailings from the flotation of the copper sulfide are then deslimed. After desliming, the tailings are activated with sodium sulfide and free copper oxide is flotated using amyl xanthate and butyl ammonium black powder as collectors. Ethylenediamine phosphate is then used for enhanced activation, followed by the addition of sodium sulfide and amyl xanthate and butyl ammonium black powder as collectors to flotate bound copper oxide. Finally, high-gradient strong magnetic separation is used to recover weakly magnetically bound copper oxide that is difficult to float and contains adsorbed or fine particles of iron, manganese, cobalt, and other minerals. The method achieves a total copper recovery rate exceeding 85%, which is more than ten percentage points higher than the global average recovery rate for copper oxide ores. This method effectively addresses the current technical problem of low recovery rates for copper oxide ores using a single process.

The invention discloses an ionic rare earth separation high ammonium salt wastewater treatment method, which comprises: adding ammonia water and xanthate to wastewater, carrying out solid-liquid separation, continuously adding phosphate to the liquid, and carrying out solid-liquid separation to obtain impurity-removed wastewater; carrying out evaporative crystallization on the waste water after impurity removal until the volume is reduced to 10-30%, and then carrying out solid-liquid separation to obtain an ammonium chloride product and crystallization mother liquor; and combining the crystallization mother liquor with the high ammonium salt wastewater, and repeating the steps. The invention aims to provide the method for recycling the southern ionic rare earth separation high ammonium salt wastewater, which is simple in process, low in operation cost and good in product quality.

The present application relates to the field of frother, in particular to a kind of copper flotation collector frother and preparation method thereof, by weight parts, including the following raw materials: N,N-dibutyl dithiocarbamic acid propyl cyanurate 100-120 parts, O-butyl-N-isobutyl thiopropyl carbamate 12-18 parts, xanthate 12-18 parts, phosphate ester polypropylene glycol ether 15-20 parts, modified betaine 5-8 parts, alcohol ether 3-5 parts, slime inhibitor 1-3 parts, alcohol ether carboxylate 2-5 parts, sorbitan monooleate 0.8-1.2 parts. Through the synergies of each raw material, the collector capacity, selectivity in copper flotation process can be effectively improved, and the reagent stability is good.

This invention belongs to the field of mineral processing technology, specifically relating to a selective sulfidation roasting-flotation separation method for a smithsonite-calcite mixed ore. The method first involves crushing and grinding the smithsonite, calcite, and sulfiding agent, then mixing them in a certain proportion and subjecting them to sulfidation roasting, preferentially causing the smithsonite to undergo sulfidation. After cooling the roasted product in an inert atmosphere, flotation separation is performed using xanthate as a collector to obtain zinc concentrate. By controlling the atmospheric conditions during the sulfidation roasting process, the sulfidation reaction efficiency of the smithsonite can be improved, and the generation of sulfur oxide gases during roasting can be reduced. When using this method to process the smithsonite-calcite mixed ore, effective recovery of the smithsonite can be achieved, with a flotation recovery rate exceeding 88%. This invention features a simple process flow and easily controllable operating conditions, providing a new technical approach for the efficient utilization of smithsonite resources.

The invention relates to the technical field of comprehensive utilization of vanadium titano-magnetite resources, in particular to a flotation combined reagent and a flotation method for vanadium titano-magnetite associated ultralow-grade cobalt-nickel ore. The flotation combined reagent comprises a copper ammonia compound activating agent composed of copper sulfate, ammonium carbonate and sodium citrate, a compound inhibitor composed of sodium humate, tannic acid and sodium tripolyphosphate, a main collecting agent butyl xanthate, an auxiliary collecting agent alkyl hydroxamic acid and a foaming agent diethylene glycol monobutyl ether. According to the method, a technical system of bulk flotation process-novel collaborative reagent system is constructed, so that the technical problem of recycling associated ultralow-grade cobalt and nickel resources in the vanadium titano-magnetite iron separation tailings is successfully solved, the problem of low separation efficiency of ultralow-grade minerals is effectively solved, a complete and efficient technical scheme is formed, and the method is suitable for industrial production. And an innovative technical path is provided for comprehensive recovery of associated cobalt and nickel resources of the vanadium titano-magnetite.

The utility model provides an accurate metering device for xanthate production, which comprises a machine body, a power mechanism and a pump body, the top of the machine body is fixedly connected with the power mechanism, the output end of the power mechanism enters the machine body, the side face of the machine body is fixedly connected with the pump body, the bottom of the pump body is fixedly connected with an input connector, and the input connector is fixedly connected with the output end of the pump body. The top of the pump body is fixedly connected with an output connector, the front face of the machine body is in threaded connection with a threaded pin, and the outer end of the threaded pin is fixedly connected with a rotary knob. The utility model has the advantages that the half clamp is fixed on the front side of the machine body through the screw and forms an annular clasping structure with the movable clasping clamp; rubber fastening protrusions are embedded in the inner sides of the holding clamps, friction locking between the holding clamps and the threaded pins is enhanced, end heads with notches are arranged at the ends of the two clamping hoops, and the clamping hoops are fastened through bolts and padded nuts. After adjustment is completed, the holding clamp and the half clamp are closed, the nut is tightened to enable the protrusion to press the threaded pin, displacement caused by vibration or pressure fluctuation is prevented, and constant metering parameters are guaranteed.

The invention relates to the technical field of lithium ion batteries, in particular to a thermal response interface passivator composition, an electrolyte and a lithium ion battery. The thermal response interface passivator composition comprises a silane component and a chalcogenide component, the silane component is selected from any one or more of 3-mercaptopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane or gamma-methacryloyloxypropyltrimethoxysilane, and the silane component is selected from any one or more of 3-mercaptopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma-methacryloyloxypropyltrimethoxysilane; the sulfur component is selected from diisopropyl xanthate disulfide and / or diphenyl disulfide. The thermal response interface passivator composition provided by the invention does not influence the electrochemical performance of a battery under the conventional operation condition of the battery, and can spontaneously polymerize on the surface of a negative electrode at the high temperature of 100-120 DEG C to form a stable and compact passivation layer, namely, an effective thermal barrier is formed before a diaphragm is broken, so that electron leakage and electrolyte decomposition are effectively blocked, and the service life of the battery is prolonged. And the thermal safety of the battery is obviously improved.

The present application relates to the technical field of ore-dressing wastewater treatment, and particularly relates to a magnetized photocatalyst through magnetic separation concentrate, and a preparation method and application thereof. The present application disperses the magnetic separation concentrate after ball milling into a mixed solution of anhydrous ethanol, water and ammonia water to obtain a suspension 1; a mixed solution of tetraethyl orthosilicate and anhydrous ethanol is added into the suspension 1 to perform coating to obtain gamma-Fe2O3@SiO2; the photocatalyst, a solvent and gamma-Fe2O3@SiO2 are mixed to obtain the magnetized photocatalyst; the photocatalyst is bismuth tungstate or bismuth oxyiodide. Under the optimal conditions, the degradation efficiency of the photocatalyst on xanthate can reach 100%, and the photocatalyst can be recycled through magnetism, so that the operation cost is greatly reduced, and the photocatalyst has a good application prospect. The present application utilizes the natural magnetic hematite gamma-Fe2O3, avoids the problems of numerous artificial synthesis steps and high cost, and has a wide application prospect in the field of magnetic photocatalysts.

The invention discloses a preparation method and application of a fluorine-sulfur synchronous removal collector in a magnetite concentrate, wherein step 1 selects 50 80 parts of oleic acid, 10 20 parts of benzohydroxamic acid, and 0 10 parts of lauric acid, and the formed mixture is added to a reaction vessel to carry out saponification reaction; step 2, the saponified product obtained in step 1 is stirred and mixed with xanthate and black medicine to obtain a final collector, which is used for reverse flotation desulfurization and defluorination of magnetite concentrate. The present invention provides a method for preparing a flotation collector for synchronous desulfurization and defluorination of a magnetite concentrate having stable operation, economy, environmental protection, high efficiency and strong adaptability, and provides an application method of the flotation collector.

The application provides a high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions and a preparation method and application thereof. The high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions is composed of mixed alcohols, pine oil, sulfur-nitrogen esters, diesel oil, xanthate and a surfactant. The high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions is simple in preparation method, does not produce intermediate products, has low irritation, is friendly to the environment, has low dosage of the medicament compared with traditional single foaming agent, has stable foam properties, and can also assist in collecting some chalcopyrite, molybdenite and other sulfide ores. Within the range of the component allocation, the foaming agent can fully exert the synergistic effect of each component. In a high-altitude environment (altitude >= 3500m), the foaming capacity and foaming rate of the foaming agent are obviously superior to those of traditional foaming agents.

The invention relates to the technical field of medicament synthesis, and particularly discloses a microreactor device for preparing liquid isopropyl xanthate, the microreactor device comprises a workbench, the top of the workbench is fixedly connected with a mixing tank through a support, and the two sides and one end of the mixing tank are communicated with feeding pipes; the end, away from the mixing tank, of the feeding pipe communicates with a discharging port of a metering pump, the bottom of the metering pump is fixedly connected with the top of the workbench, the inner wall of the mixing tank is rotationally connected with a mixing device, and the part, located below the mixing tank, of the top of the workbench is fixedly connected with a first motor. According to the microreactor device for preparing the liquid isopropyl xanthate, the mixing device is arranged, so that the mixing efficiency of isopropanol, carbon disulfide and liquid caustic soda before reaction can be improved, and the dosing mechanism is arranged, so that the mixing efficiency of isopropanol, carbon disulfide and liquid caustic soda before reaction can be improved. Therefore, the reaction efficiency of the mixed solution of isopropanol, carbon disulfide and caustic soda liquid during reaction can be improved.

The invention relates to the field of mineral processing, and provides a method for reducing the content of sulfur in iron ore concentrate, which comprises the following steps: preparing the iron ore concentrate into ore pulp with the mass fraction of 30-50%; s2, the ore pulp in the step S1 is pretreated, and the pretreatment mode is ultrasonic treatment or hydraulic cavitation treatment; the ore pulp pretreated in the step S2 is subjected to flotation operation, sulfur-containing foam is obtained through flotation, low-sulfur concentrate is obtained, and the remaining product is desulfurized iron ore concentrate; the flotation reagent comprises a conditioning agent, a collecting agent and a foaming agent, the conditioning agent comprises lime and copper sulfate, the collecting agent is amyl xanthate, and the foaming agent is methyl isobutyl carbine.According to the method, ultrasonic or hydraulic cavitation pretreatment is combined with the flotation reagent, the floatability of pyrrhotite in the iron ore concentrate is improved, and the flotation efficiency is improved; and the sulfur content in the iron ore concentrate is obviously reduced.

The invention discloses a pyrite inhibitor, a preparation method thereof and a zinc-sulfur separation and sulfur ore inhibition method, and relates to the technical field of mineral separation. Acrylamide and sodium xanthate in a specific proportion react to prepare the pyrite inhibitor, a copolymer containing sulfur groups is obtained, the xanthate groups in the copolymer are specifically combined with Fe < 2 + > on the surface of pyrite, and efficient inhibition of sulfur can be achieved. The pyrite inhibitor is applied to desulfurization flotation, the zinc-sulfur separation efficiency can be remarkably improved, the pyrite inhibition rate is increased by 30% or above, and the sulfur content in zinc concentrate is reduced to 3% or below.

The invention belongs to the technical field of tailing sewage treatment equipment, and particularly provides multi-stage treatment equipment and a multi-stage treatment method for tailing sewage treatment. The invention discloses multi-stage treatment equipment for treating tailing sewage. The multi-stage treatment equipment comprises a shell, a bottom bin, a sealing bin, a rotating shaft and a turntable, the invention relates to a multistage treatment method for treating tailing sewage. An electrochemical pH regulation and impurity directional precipitation stage; a stirring and diffusion strengthening stage; a precipitate separation and conveying stage; a heating disinfection and final discharge stage; and a real-time monitoring and self-adaptive adjusting stage. According to the method, the pain points of local acid-base imbalance and slow overall adjustment in traditional electrochemical treatment are solved, the pH balance efficiency is improved by 30% or above, and the reaction process is more environmentally friendly; and refractory organic matters such as xanthate and phenols are directly converted into harmless small molecules through anodic oxidation, so that compared with a traditional fractional step method, the treatment process is shortened, and the comprehensive purification efficiency is greatly improved.

A novel bis-ligand chalcopyrite collector and a preparation method and application thereof. The collector is prepared by first synthesizing an intermediate oxalyl diisothiocyanate from oxalyl chloride and thiocyanate, and then reacting the intermediate with an amine or an alcohol using a one-pot method. The collector provided by the present disclosure can form more stable dual-site adsorption on the chalcopyrite surface, thereby generating a more stable double-chelate-ring structure than the single-site adsorption of a traditional chalcopyrite collector such as xanthate and dithiophosphate. The collector not only has higher collection ability and excellent selectivity, but also can achieve efficient copper-sulfur separation even under a low-alkalinity condition. The preparation process of the collector is simple and operable, facilitating the flotation of chalcopyrite and its separation from pyrite.