77 results about "Sodium sulfide" patented technology

A beneficiation method for improving a grade of a magnesium-containing copper sulfide ore concentrate includes: crushing and grinding an ore to a fineness degree allowing 55% to 65% of particles to pass through a 0.074 mm sieve, adding an adjusting agent lime, collecting agents butylxanthate and kerosene, and a foaming agent methyl isobutyl carbinol (MIBC) to obtain a copper-molybdenum-sulfur mixed concentrate; re-grinding the copper-molybdenum-sulfur mixed concentrate to a fineness degree allowing 75% to 82% of particles to pass through a 0.048 mm sieve, adding lime, a magnesium-containing silicate inhibitor, a collecting agent 1, and MIBC to obtain a copper-molybdenum mixed concentrate; and adding sodium sulfide, kerosene, and MIBC to the copper-molybdenum mixed concentrate to obtain a high-grade copper concentrate. The beneficiation method adopts mixed flotation of copper-molybdenum, regrinding for separating copper and molybdenum from sulfur, and magnesium removal from a copper concentrate to allow quality improvement for the copper concentrate.

A treatment composition for remediating for remediating hydrogen sulfide (H2S), carbon dioxide (CO2) and other contaminant(s) in a fluid, including: an organic or hydrocarbon based liquid; at least one hydroxide compound or a hydrate thereof; and sodium sulfide (Na2S) or a hydrate thereof.

The invention discloses a (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material as well as a preparation method and application thereof, and belongs to the technical field of functional materials. The preparation method comprises the following steps: uniformly mixing and stirring cyclohexanol, acetylacetone and absolute ethyl alcohol, adding tungsten hexachloride, uniformly stirring at room temperature, then adding ferric trichloride, uniformly stirring at room temperature, carrying out hydrothermal reaction, washing and drying to obtain the (Fe (OH) 2) ((OH) 0.25 (H2O) 0.5) / W18O49 composite material. A mixed system of cyclohexanol, acetylacetone and absolute ethyl alcohol is utilized to synergistically solve the problems of advanced hydrolysis and agglomeration of metal ions; the oxygen vacancy of the W18O49 accelerates the conversion of the sodium polysulfide, and the Fe (OH) 2 derivative strengthens the chemical anchoring of the sodium polysulfide, thereby realizing the synergy of the anchoring and rapid conversion of the NaPSs. When being used as a sodium-sulfur battery positive electrode material catalyst, the catalyst shows excellent catalytic performance and rate capability, and still has the capacity of 420 mAh g <-1 > after circulating for 25000 circles under the large current density of 10 A g <-1 >. The strong adsorption characteristic of the hydroxylated iron-based component and the high catalytic activity of W18O49 are utilized to form a synergistic effect, and a new scheme is provided for breaking through the technical bottleneck of an RT Na-S battery.

The present application relates to the technical field of extracting rare earth, and particularly relates to an extraction rare earth separation process method. Fluorine-carbon cerium ore crude ore is treated to obtain activated ore powder. The activated ore powder is subjected to alkali pressure boiling oxidation, roasting transformation and optimal dissolution leaching to obtain a purified liquid. The purified liquid is then subjected to barium chloride sulfuric acid removal, lead removal by sulfurized lead, pH adjustment and the like to obtain a low-impurity chlorinated rare earth liquid. The chlorinated rare earth liquid is subjected to multi-stage extraction to obtain a neodymium chloride solution, a praseodymium-neodymium chloride solution and a lanthanum-cerium chloride solution. The solutions are subjected to oxalic acid precipitation and calcination to obtain a rare earth oxide product. The present application adopts fine pretreatment, multi-stage differential extraction and purification processes to achieve efficient separation of lanthanum-cerium, praseodymium-neodymium and neodymium in fluorine-carbon cerium ore and improve product purity.

This invention discloses a method for preparing high-purity Si-75, comprising: S1, adding sodium sulfide, sulfur, and deionized water in a molar ratio of 1:(1.0~1.1):(5~8) to a reaction vessel, adding a buffer, and reacting at 80~90℃ for 1~2h; S2, adding a phase transfer catalyst and a hydrolysis inhibitor to the system, adding γ-chloropropyltriethoxysilane dropwise, and reacting at 85~95℃ for 3~5h, allowing the mixture to stand and separate into layers after the reaction, to obtain an organic phase; S3, subjecting the organic phase to short-path distillation and then filtering to obtain high-purity Si-75. Compared with existing technologies, this invention uses a phosphorus-free buffer system, which simplifies waste treatment. It uses water as the reaction medium and does not use large amounts of organic solvents, making it suitable for continuous industrial production. By adding hydrolysis inhibitors, hydrolysis can be effectively prevented during the reaction, increasing safety. The short-path distillation method provides high purification efficiency and can quickly remove impurities. The product has a disulfide content of ≥98.5% and a color of 0 (Gardner color number), which is of great significance to the light-colored rubber industry.

The invention relates to the technical field of solid waste treatment and resource utilization, and particularly discloses a waste incineration fly ash harmless treatment method based on water washing-sulfide cooperative circulation. The method comprises the following steps: firstly, carrying out crushing, drying and sieving pretreatment on the fly ash; secondly, carrying out water washing desalination and detoxification on the fly ash by adopting deionized water under the conditions of optimized liquid-solid ratio, water washing temperature, time and stirring rate, and carrying out solid-liquid separation to obtain water-washed fly ash and water washing liquid; then adding a sodium sulfide solution with a certain concentration and proportion into the water washing liquid, and removing heavy metal ions through reaction, centrifugation and membrane filtration to obtain purified water washing liquid; and finally, the residual sulfur ions in the purified water washing liquid are partially recycled to the untreated water washing liquid, so that closed circulation of the sulfur ions and medicament saving are realized. By means of the method, the leaching concentration of Cl and heavy metal in the fly ash can be remarkably reduced, the fly ash can meet the hazardous waste landfill pollution control standard (GB18598-2019), and the treated washing liquid can reach the first-level emission limit value of the integrated wastewater emission standard (GB8978-1996). Compared with a traditional solidification / stabilization method, the method has the advantages of being high in desalination rate, high in heavy metal removal efficiency, low in energy consumption, low in operation cost, near-zero in emission and the like, and an efficient, economical and environment-friendly solution is provided for harmless treatment and resource utilization of the waste incineration fly ash.

The invention relates to the technical field of preparation of organic silicon functional materials, and particularly discloses an integrated preparation method of bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, which comprises the following steps: by taking a chloropropyl triethoxy silane-chloromethyl phenethyl triethoxy silane mixture as a raw material, carrying out one-step reaction on the raw material to obtain bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane, and carrying out one-step reaction on the bis-[gamma-(triethoxy silicon) propyl] tetrasulfide-chloromethyl phenethyl triethoxy silane mixed silane; in the whole process, a reaction system and process parameters are reserved and designed around the function of chloromethyl phenethyl triethoxy silane, and the overall production efficiency is improved by shortening the time consumption of a sodium sulfide synthesis procedure; the target mixed silane is prepared through four core processes of sodium sulfide synthesis, sodium polysulfide in-situ preparation, selective vulcanization in a phosphate buffer system and product homogenization in sequence. According to the invention, a one-step integrated preparation method is innovatively adopted to replace a traditional compounding process, the total impurity content of the product is less than 0.6%, the equipment investment cost is reduced, and the overall production efficiency is improved.

A method for treating polluted acidic wastewater from smelting with an activated pyrite concentrate includes: drying and grinding a pyrite concentrate, and washing twice to produce a washed pyrite concentrate powder; mixing the washed pyrite concentrate powder with a Na2S powder to produce a mixed powder, and adding purified water; allowing a reaction for 3.5 h to 4.5 h; filtering to produce an activated pyrite concentrate; subjecting the activated pyrite concentrate to aeration and standing, drying, and grinding to produce an activated pyrite concentrate powder; adding a lime slurry to the wastewater to adjust a pH; adding the activated pyrite concentrate powder, and allowing an ultrasonic treatment, continuous stirring is conducted; allowing a settlement to produce a first supernatant; adding a lime slurry to the first supernatant to adjust a pH; further allowing a settlement to produce a second supernatant; and separating the second supernatant.

The application discloses a copper-lead separation inhibitor and a preparation method and an application method thereof, and the preparation method comprises the following steps: mixing acrylic acid-2-acrylamide-2-methylpropane sulfonic acid copolymer, hydrolyzed polymaleic anhydride, sodium silicate and sodium sulfite, and performing emulsification and dispersion to obtain a uniform viscous suspension. The application method comprises the following steps: adding active carbon, sodium sulfide, the copper-lead separation inhibitor, a collector Z-200 and a foaming agent No. 2 oil into copper-lead mixed concentrates to perform copper-lead separation flotation operation; performing three times of cleaning on the copper rough concentrates; and performing three times of scavenging on the obtained lead rough concentrates. The inhibitor composition is non-toxic; the inhibitor is rich in carboxyl and sulfonic acid groups, and under the action of the two main groups, the adsorption effect of the inhibitor on the surface of galena can be enhanced; the inhibitor can be used under neutral, weak acidic and weak alkaline conditions, has strong inhibition effect on galena, is strong in selectivity, is easy to obtain and store, is friendly to the environment, and can effectively improve the flotation separation indexes of copper-lead sulfide ores.

The present application belongs to the technical field of non-ferrous metallurgy, and particularly relates to a method for cooperatively removing copper, arsenic, tellurium and lead in crude bismuth, which comprises the following steps: S1, obtaining molten bismuth liquid by melting, adding an oxidizing agent to the molten bismuth liquid, and performing a pre-oxidation reaction under stirring; S2, adding a composite removing agent and a fluxing agent to perform a reaction, and then removing surface dross; the composite removing agent comprises iron powder, bismuth phosphate and sodium sulfide; S3, adding the crude bismuth after step S2 to a vacuum rectification furnace, vacuum heat-insulating, and outputting refined bismuth. Through the cooperative design of pre-oxidation activation, in-situ sulfidation and phosphate slagging, the present application realizes the simultaneous and efficient removal of impurities such as Cu, As, Te and Pb, and the effective recovery of Ag. Subsequent vacuum distillation further removes residual lead in depth, and ensures that the refined bismuth product reaches a high standard.

The invention discloses a segmented intensified leaching arsenic removal method for high-arsenic copper ore, and belongs to the technical field of mineral processing engineering. The method comprises the following steps: mixing crushed high-arsenic copper ore with additives, namely limestone and sodium hydroxide, and carrying out activation pretreatment through microwave cracking and quenching; a mixed solution of sodium sulfide and sodium hydroxide is adopted as a leaching agent for the pretreated mineral aggregate, and a first-stage ore grinding-leaching process, a second-stage ore grinding process, a synergistic enhanced oxidation process and a second-stage ore grinding-leaching process are sequentially carried out; and the first-stage leachate is returned to the first-stage ore grinding, the second-stage leachate is returned to the second-stage ore grinding, and finally the arsenic-removed high-copper slag is obtained. According to the method, the arsenic mineral structure is effectively destroyed through microwave pretreatment, efficient and selective removal of arsenic and cyclic utilization of the leaching agent are achieved in combination with the segmented enhanced leaching process, and the method has the advantages of being short in process, small in pollution and high in recovery rate.

This invention discloses a WS2 / WO2 composite material, its preparation method, and its application in sodium-sulfur batteries, belonging to the field of functional material preparation technology. The method includes: mixing cyclohexanol and oleic acid evenly to obtain a mixed solvent; adding tungsten hexachloride to the mixed solvent and stirring at room temperature until dissolved to obtain a precursor solution; subjecting the precursor solution to a hydrothermal reaction, washing, and drying to obtain W2 / WO2. 18 O 49 Powder; W 18 O 49 After the powder and sulfur source undergo a thermally controlled reaction under an inert atmosphere, a WS2 / WO2 composite material is obtained. This invention prepares a WS2 / WO2 composite material with a unique three-dimensional heterostructure through a simplified two-step method. By integrating the strong adsorption properties of WS2 and the high catalytic activity of WO2, and through interfacial coupling, the conversion of sodium polysulfides is synergistically accelerated. At the same time, its preparation process is significantly more complex than existing technologies, and can effectively suppress the shuttle effect, improve reaction kinetics, and enhance battery cycle stability.

The application relates to a preparation method and application of chiral two-dimensional cadmium sulfide nanosheets. The application aims to solve the problem that it is difficult to construct non-layered chiral two-dimensional inorganic nanomaterials. The method comprises the following steps: placing a first open reaction container and a second open reaction container in a sealable container, adding a cadmium acetate solution into the first open reaction container, then adding a left-rotational ibuprofen / chloroform solution drop by drop, adding a sodium sulfide aqueous solution into the second open reaction container, then adding a hydrochloric acid solution drop by drop, and finally sealing and standing. The application is used for preparing a circularly polarized light detection device for detecting left-rotational / right-rotational circularly polarized light. The application is used for the preparation and application of chiral two-dimensional cadmium sulfide nanosheets.

The invention relates to the technical field of mineral resource recycling and reusing, in particular to a beneficiation method for recycling bismuth resources from polymetallic ore concentrate tailings, which comprises the following steps: obtaining the polymetallic ore concentrate tailings containing bismuth and bismuthite inhibitor sodium sulfide; concentrating the tailings to discharge sodium sulfide, diluting, and then adding a reagent removal agent and a sulfur removal agent for activating treatment to finish the procedures of concentration reagent removal and surface de-intercalation; and roughing, concentration and scavenging are conducted, and bismuth concentrate is obtained. According to the beneficiation method, the surface of the bismuthite subjected to reagent removal treatment can be effectively repaired and optimized, so that the hydrophobic floatability of the bismuthite is recovered and enhanced; meanwhile, the accurate selection and dosage control of the gangue inhibitor ensure that other impurities are effectively inhibited while the bismuth is activated and floated, and the grade of bismuth concentrate is guaranteed.

The invention relates to a method for synchronously removing aluminum and arsenic from a tellurium electrolyte, which comprises the following steps: S1, adjusting the pH value of the tellurium electrolyte to be acidic to obtain an acidic tellurium electrolyte; s2, adding a precipitator into the acidic tellurium electrolyte, and carrying out precipitation reaction to obtain a mixed solution; the precipitator is a mixture of sodium sulfide and ferric salt; and S3, performing solid-liquid separation on the mixed solution to complete synchronous aluminum and arsenic removal of the tellurium electrolyte. According to the method, the aluminum and arsenic impurities in the tellurium electrolyte can be efficiently removed while the tellurium loss rate is low, especially the precipitant is added at the same time, the mutual promotion effect on synchronous aluminum and arsenic removal is achieved, the aluminum content in the electrolyte after impurity removal is lower than 0.01 mg / L, the arsenic content in the electrolyte after impurity removal is lower than 0.05 mg / L, and the purity and quality of tellurium are effectively improved.

The invention belongs to the technical field of solid waste resourceful treatment and catalytic materials, and particularly relates to a method for extracting zinc from lead-zinc smelting slag to prepare a zinc sulfide photocatalyst and application. Zinc extracted from lead-zinc smelting slag is used as a zinc source to prepare zinc sulfide, and the method specifically comprises the steps that the lead-zinc smelting slag is added into a sulfuric acid solution for acid leaching treatment, then sodium sulfide is added into obtained acid leaching supernate for a reaction to obtain zinc sulfide sediment, the sediment is collected, washed and dried, and then the zinc sulfide photocatalyst is obtained. The zinc sulfide prepared through the method serves as a catalyst to be applied to photocatalytic decomposition of water to prepare hydrogen, the photocatalytic hydrogen production performance of the zinc sulfide is greatly improved compared with zinc sulfide synthesized through drugs and commercial zinc sulfide, and a new way and direction are provided for resource utilization of the lead-zinc smelting slag.

The application discloses a method for removing heavy metals in fly ash acidic leaching solution wastewater with hexavalent chromium as a trigger agent, which comprises the following steps: (1) adjusting the content of hexavalent chromium in the fly ash acidic leaching solution, and adjusting the pH to 3-6 to obtain treated wastewater; (2) pumping the treated wastewater into a fixed bed filled with sponge iron through a peristaltic pump, and further treating the effluent through sodium sulfide, then performing precipitation and filtration; introducing Cr(VI) into the acid leaching solution of medical waste incineration fly ash (FA), and revealing the space-time migration law of multiple target heavy metals (HMs) through an s-Fe0 packed bed column reactor; the results verify that most residual heavy metals can be efficiently removed, accompanied by the cooperative regeneration of passivated sponge iron; the research enriches the basic theory of ZVI packed bed reactor cooperative regeneration, and provides a novel, economical and sustainable strategy for the harmless treatment of fly ash leaching solution.

The invention relates to the technical field of comprehensive utilization of solid waste resources and catalysts, and provides a preparation method of a catalyst for extracting molybdenum, iron and zinc from copper smelting tailings. The method comprises the following steps: mixing silicon dioxide, sodium hydroxide and sodium sulfide according to a molar ratio of 1: (1.5-3): (0.8-2), then mixing with N, N-dimethylformamide according to a solid-to-liquid ratio of 1: (6-8), and carrying out solvothermal reaction at 180-220 DEG C under the oxygen pressure of 5-8 MPa for 3-5 hours; and cooling, filtering, washing and drying the reaction product, and calcining in a nitrogen atmosphere at 300-500 DEG C for 1.5-2.5 h to obtain the catalyst. According to the method, through regulation and control of carrier modification, sulfur source introduction and metal complexing, a sulfide active center is effectively formed, sulfur loss is inhibited, the obtained catalyst is used for copper smelting tailing treatment, molybdenum, iron and zinc can be efficiently extracted, the molybdenum leaching rate is larger than 90%, the zinc leaching rate is larger than 85%, the iron ore concentrate grade is larger than 55%, and the iron ore concentrate grade is larger than 55%. The method has the advantages of high metal recovery rate, environment-friendly process and good catalyst stability.

The invention relates to the field of resource recycling, in particular to a fused salt chlorination dust collection slag resourceful treatment method which comprises the following steps: S1, dust collection slag is mixed with water, the ratio of liquid volume to solid mass is (2-4): 1, the soaking time is not less than 2 hours, then solid-liquid separation is performed, and a leaching solution 1 and a leaching residue filter cake 1 are obtained; s2, carrying out solid-liquid separation after neutralizing and precipitating the leaching solution 1 to obtain a leaching residue filter cake 2 and a leaching solution 2; s3, pulping and dissolving the residue filter cake 2, mixing with a sodium hydroxide solution, adjusting the pH value of the solution to 12 or above, carrying out solid-liquid separation, adjusting the pH value of the liquid solution to 7.5-8.5, and carrying out solid-liquid separation; s4, mixing the leachate 2 with a sodium sulfide solution, filtering and separating, adjusting the pH value of filtrate to 10-10.5, and carrying out solid-liquid separation; and S5, carrying out flotation on the leaching residue filter cake 1. The molten salt chlorination dust collection slag resourceful treatment method and system provided by the invention can realize remarkable environmental benefits, resource benefits and process benefits.

The invention relates to the technical field of rare earth extraction, in particular to a rare earth extraction separation process method which comprises the following steps: treating raw bastnaesite to obtain activated mineral powder, performing alkali pressure boiling oxidation, roasting transformation and optimal dissolution leaching on the activated mineral powder to obtain a purified solution, removing sulfate radicals by barium chloride, removing lead by sodium sulfide and adjusting pH to obtain a rare earth chloride solution with low impurity content; performing multi-stage extraction on the rare earth chloride solution to obtain a neodymium chloride solution, a praseodymium neodymium chloride solution and a lanthanum cerium chloride solution, and performing oxalic acid precipitation and calcination to obtain a rare earth oxide product. According to the method disclosed by the invention, the processes of fine pretreatment, multi-stage differential extraction and purification are adopted, so that efficient separation of lanthanum cerium, praseodymium neodymium and neodymium in bastnaesite is realized, and the product purity is improved.

The invention provides a method for enhancing the flotation effect of low-grade zinc oxide ore by adopting a composite collecting agent, and belongs to the technical field of lead zinc ore flotation. Starting from the thought of integrated selective regulation and control of the whole process of ore grinding, sedimentation and desliming, size mixing and lead floating and size mixing and selective zinc floating, sodium sulfide, water glass and a composite collecting agent are added step by step through all levels of flotation operation, and the flotation environment of smithsonite is regulated and controlled by developing a compound selective amine reagent. By means of the selective collecting effect of the composite collecting agent on smithsonite, the problems of high oxidation rate, sticky zinc oxide ore foam, low recovery rate, poor selectivity, high cost and the like are solved, the zinc recovery rate and the concentrate grade of the low-grade zinc oxide ore are improved, and efficient flotation recovery of the low-grade zinc oxide ore with the high oxidation rate is achieved. The technological process is simple and convenient, industrial production is easy, the zinc oxide ore containing calcium-containing minerals such as calcite and dolomite has good selectivity, and better zinc oxide flotation indexes can be obtained.

The utility model provides an arsenic-containing wastewater treatment system. The arsenic-containing wastewater treatment system comprises a pretreatment unit, an arsenic removal unit, a primary DTRO (Disk Tubular Reverse Osmosis) unit and a secondary RO unit which are sequentially connected from wastewater collection to discharge, the pretreatment unit is used for receiving arsenic-containing wastewater and pre-removing arsenic-containing large-particle-size substances in the wastewater through precipitation, sedimentation and low-pressure filtration; the arsenic removal unit is used for removing soluble arsenic in the wastewater by adding sodium sulfide and a ferrous ion arsenic removal agent to form a precipitate; the first-stage DTRO unit at least comprises a first-stage reverse osmosis high-pressure plunger pump, and wastewater subjected to pretreatment and arsenic removal treatment passes through the first-stage reverse osmosis high-pressure plunger pump to generate a first-stage concentrated solution and a first-stage permeate; and the second-stage RO unit is connected behind the first-stage DTRO unit and is used for further treating the first-stage permeate. According to the treatment system for the arsenic-containing wastewater, efficient purification and resource utilization of the arsenic-containing wastewater are achieved through a multi-stage treatment process, and the treatment cost is reduced.

Manufacturing process for tungsten-doped cobalt tetroxide, comprising the following steps: S1: Dissolving a tungsten-containing compound and a molybdenum-containing compound in an alkaline liquid to obtain a mixed solution; S2: simultaneous addition of the mixed solution, a cobalt salt solution and a complexing agent to an alkaline solution to react until a reaction material reaches a target particle size; followed by aging and carrying out a solid-liquid separation (SLS) to obtain a precipitation, wherein the alkaline solution comprises the mixed solution and ammonia water; S3: Roasting the precipitate in an oxygenated atmosphere to obtain a roasted material; and S4: Soaking the roasted material in a sodium sulfide solution, adjusting the pH of the solution to 7.2 to 8.5, and performing SLS to obtain the tungsten-doped cobalt tetroxide.

This invention relates to a method for preparing high-purity sodium pyroantimonate from antimony-containing waste, belonging to the field of sodium pyroantimonate preparation technology. Specifically, the method includes: crushing and ball milling the antimony-containing waste, followed by sulfidation-alkali leaching in the presence of modified inorganic mineral additives. Antimony enters the solution as Na3[SbS3], while lead, copper, and iron precipitate as sulfides in the slag phase. The additives improve the settling and filtration performance of the leaching slag and assist in the adsorption of colloidal arsenic. After deep purification of the leachate with sodium sulfide, the mother liquor is cooled and crystallized to remove arsenic, which is separated as sodium arsenite crystals. The purified liquid undergoes air oxidation precipitation under seed crystal induction, followed by liquid-solid separation, washing, and drying to obtain high-purity sodium pyroantimonate product. This invention meets the quality requirements of electronic-grade glass clarifying agents, and features strong process compatibility, controllable additive costs, and recyclable mother liquor.

This invention provides a process for removing thallium from nickel sulfate solution, belonging to the field of nickel-cobalt hydrometallurgical technology. It solves the problems of low efficiency, unsatisfactory results, and insufficient removal depth in existing extraction processes for thallium removal from nickel sulfate solution, which fail to meet environmental protection requirements. The invention includes the following steps: saponifying a P204 extractant with a nickel sulfate solution; then adding a thallium-containing nickel sulfate solution for extraction and impurity removal; adding a C272 extractant to the first thallium-containing nickel sulfate solution for countercurrent extraction and impurity removal; adding 6-10 times the concentration of sodium sulfide according to the remaining thallium content in the second removal solution, followed by stirring, precipitation, and filtration; heating the third thallium-containing nickel sulfate solution, and then using a C-100E cation exchange resin for thallium adsorption to obtain the final thallium-removed nickel sulfate solution. This invention achieves stable control of the thallium content in the nickel sulfate solution, and the process adopts a step-by-step approach to increase the impurity removal depth, ultimately achieving deep thallium removal from the nickel sulfate solution.

The application provides a method and equipment for separating selenium and tellurium from high-tellurium crude selenium raw materials. The method can selectively form tellurium polysulfide from tellurium in the crude selenium by adding sulfur in an alkaline solution, so that the metallic tellurium is converted into ions and enters the solution, and the main metallic selenium remains in the slag, thereby preliminarily and effectively separating the selenium and the tellurium, achieving a separation coefficient of 90.67%, and reducing the content of tellurium in the crude selenium raw material from 0.30% to 0.028%. The application has the advantages of good selenium and tellurium separation effect, simple operation, short process, and strong raw material adaptability.

The invention belongs to the technical field of lead ore flotation, and discloses a stable and rapid flotation method for lead ore. Raw lead-zinc ore is subjected to ore grinding and grading, sodium sulfide is added in the ore grinding and grading process and then mixed with water, and ore pulp is obtained; a zinc inhibitor, a lead collecting agent and a foaming agent are added into the ore pulp, the ore pulp enters a flotation column for lead stable and rapid flotation, and flotation column lead concentrate and flotation column tailings are obtained; adding an agent into tailings of the flotation column to perform lead flotation of the flotation machine, wherein the process specifically comprises one-time lead roughing, two-time or three-time lead concentration and two-time or three-time lead scavenging; and the flotation column lead concentrate and the flotation machine lead concentrate are combined to serve as final lead concentrate. By means of stable and rapid flotation of one rotational flow-static microbubble flotation column, the problems that fine lead particles are difficult to recover, the grade and the recovery rate of lead concentrate are unstable, and more zinc is carried in the lead concentrate are solved, rapid and early recovery of lead resources is achieved, mutual metal contained in the concentrate is reduced, and the overall metal recovery rate is increased.

The application relates to the technical field of ITO conductive glass recycling, and discloses a method for leaching and separating indium and tin in ITO conductive glass powder, which comprises the following steps: mixing ITO conductive glass powder with a leaching agent solution to obtain leaching ore slurry; wherein the leaching agent solution is prepared by using oxalic acid, reagent A, reagent B and water; the reagent A is an oxalate, and the reagent B is one of sodium sulfide, ammonium sulfide and TAA; the leaching ore slurry is subjected to stirring leaching, and after leaching reaction, filtration separation is carried out to obtain leaching residue and leaching liquid; the leaching liquid is subjected to hydrolysis and indium precipitation reaction, and after reaction, filtration is carried out to obtain indium precipitation filtrate and indium residue; the method has the advantages of good leaching selectivity, fast indium leaching speed, high leaching rate and low energy consumption in the leaching process, and the indium leaching rate is much higher than that in traditional oxalic acid leaching.

The invention discloses an rGO / CdS / MIL-101 (Fe) catalyst as well as a preparation method and application thereof, and belongs to the technical field of water treatment. The ternary heterojunction catalyst is prepared by adopting a two-step method: firstly, mixing ferric trichloride hexahydrate, terephthalic acid and reduced graphene oxide in N, N-dimethylformamide, and synthesizing rGO / MIL-101 (Fe) through solvothermal reaction; and dispersing the rGO / CdS / MIL-101 (Fe) catalyst in a cadmium chloride ethanol solution, adding sodium sulfide, and stirring for reaction to obtain the rGO / CdS / MIL-101 (Fe) catalyst. The degradation rate of the catalyst under the conditions of 0.3 g / L dosage and 30 mg / L antibiotic concentration after visible light irradiation for 30 min reaches 92.66%, the degradation rate is still kept to be close to 80% after circulation for 4 times, and the main active species are holes.

The invention discloses a method for qualitatively and rapidly detecting carbon disulfide in an oilfield chemical agent, and belongs to the technical field of oilfield chemical agent detection. According to the method, easily available sodium sulfide is used as a color developing agent and is subjected to color developing reaction with carbon disulfide in the oilfield chemical agent to be detected, color change after chemical reaction is distinguished by human eyes, and whether the oilfield chemical agent contains carbon disulfide or not is qualitatively judged. The method can be used for cold-color and light-color oil field chemical agents with colorless appearance or yellow, blue, green and other cold-color and light-color oil field chemical agents, and is not suitable for warm-color and dark-color oil field chemical agents with red, purple, brown, black and other warm-color and dark-color oil field chemical agents. According to the method, various analytical instruments and chemical reagents do not need to be used, carbon disulfide can be rapidly and qualitatively detected only by preparing one reagent and through one-step reagent adding operation, the color development reaction is rapid, the method has the advantages of being easy to operate, obvious in effect and low in cost, and the requirement for rapidly detecting carbon disulfide in the oilfield chemical agent in real time on site is met.