54 results about "Sulfur product" patented technology

The invention discloses a sulfur foam combined treatment device and a treatment method thereof, and relates to the technical field of sulfur foam treatment. Comprising a bottom plate, a pair of side plates are fixedly arranged on the two sides of the top face of the bottom plate, a hollow roller is rotationally clamped between the side plates, a center shaft is arranged in the middle of the interior of the hollow roller, and the right side of the center shaft is sequentially and slidably sleeved with a coarse particle filtering disc, a medium particle filtering disc and a fine particle filtering disc; a plurality of groups of first stirring paddles are fixedly arranged on the left side of the fixed sliding shaft, and the right side of the fixed sliding shaft rotationally penetrates through the coarse particle filtering disc, the medium particle filtering disc and the fine particle filtering disc in sequence. In the stirring process, components in sulfur foam are uniform, sulfur particles are fully dispersed, and agglomeration is prevented; during filtering, sulfur particles can be more effectively separated from impurities; after stirring and filtering, the purity of the sulfur product is remarkably improved, and the stability of the quality of the sulfur product is ensured by uniform stirring and fine filtering.

The utility model discloses a device for refining sulfur from coke oven gas desulfurization waste liquid, which is characterized in that a concentration filter, a concentrated sulfur foam tank, a sulfur melting kettle, a steam-water separator, a slag discharge furnace, a gasification furnace, a primary cooler, a secondary cooler, a liquid sulfur tank and a granulator are sequentially connected through pipelines; the tail gas purification system is connected with the concentrated sulfur foam tank, the steam-water separator, the deslagging furnace, the secondary cooler, the liquid sulfur tank, the granulator and the scraper slag conveyor, and the scraper slag conveyor is connected with the sulfur melting kettle, the steam-water separator, the deslagging furnace and the gasification furnace. The device can be used for purifying and refining the crude sulfur in the desulfurization waste liquid to obtain a refined sulfur product, so that the traditional solid waste is changed into the refined sulfur product, and the waste is turned into wealth. The device has the characteristics of low energy consumption, continuous automatic production, high active safety performance, high product purity and good field operation environment.

The invention discloses a catalytic electrode which comprises a substrate, and an anti-corrosion layer and a sulfur-phobic layer which are sequentially attached to the substrate, the substrate is a blank foamed nickel substrate, the anti-corrosion layer is formed by dipping the foamed nickel substrate with a ferric salt solution, and the sulfur-phobic layer is formed by processing a precursor with a cobalt salt solution through electro-deposition. Accordingly, a corresponding preparation method is also established, a blank foamed nickel substrate is adopted, firstly, the foamed nickel substrate is subjected to dipping treatment with an iron salt solution to obtain a precursor with an anti-corrosion layer, and then the precursor is subjected to electro-deposition treatment with a cobalt salt solution to form the sulfur-phobic layer on the anti-corrosion layer. Wherein the anti-corrosion layer can isolate a high-sulfur environment and prevent the substrate from being corroded; the sulfur phobic layer may prevent sulfur products from depositing and passivating the electrode. The catalytic electrode provided by the invention solves the problems of sulfur reaction corrosion and passivation, shows excellent catalytic activity and stability, and can be used for catalyzing sulfur oxidation reaction for a long time. In conclusion, the method has the advantages of mild conditions, simple process, economy and practicability, and has obvious large-scale industrial production potential.

The invention provides a method and a device for quickly and sensitively detecting a trace amount of sulfur-containing sample on site. The method comprises the following steps: adopting a Fourier deconvolution multiplexing ion mobility spectrometry technology, a negative ion mode and a thermal desorption sampling mode, and ensuring that migration gas and carrier gas do not need any chloride additive; an analysis method for directly separating an air reagent ion peak (O2 (H2O) n) and a sulfur product ion peak through ion mobility spectrometry and effectively separating sulfur-containing samples and nitrogen-containing samples such as black powder is established. According to the invention, the resolution ratio of the air reagent ion peak can be improved, the separation degree of a compound which is very close to the migration time of the air reagent ion peak can be improved, the effective separation of sulfur-containing samples such as black powder from the air reagent ion peak can be realized, and the analysis and recognition capability of the ion mobility spectrometry on the sulfur-containing samples such as black powder and nitrogen-containing samples can be improved.

The invention discloses a transition metal phosphide catalyst and a preparation method and application thereof.The preparation method comprises the steps that metal nickel salt, vanadium salt, urea and ammonium fluoride are dissolved in deionized water, and a nickel-vanadium hydroxide nanosheet precursor is synthesized through a hydrothermal method; preparing a vanadium-doped nickel phosphide nanosheet catalyst by using a low-temperature phosphating method; the electronic structure of nickel phosphide is regulated and controlled by using a vanadium doping strategy, the catalytic reaction energy barrier is reduced, and the intrinsic catalytic activity is improved; the prepared catalyst has excellent hydrogen evolution reaction and sulfur ion oxidation reaction performance, low voltage 0.389 V is needed for outputting the current density of 10 mAcm <-2 > in a constructed two-electrode sulfur ion oxidation coupling hydrogen production electrolytic cell, and the purposes of efficient and energy-saving hydrogen production and sulfur ion oxidation upgrading into a high-added-value elemental sulfur product are achieved. The synthesis method is simple and controllable, raw materials are low in price and cost, batch preparation is easy, and the catalyst can be used as an efficient water electrolysis hydrogen production and sulfur ion oxidation upgrading catalyst.

The invention relates to the technical field of nano material preparation and application, in particular to a transition metal selenide catalyst and a preparation method and application thereof.The preparation method comprises the steps that firstly, metal nickel salt, ferric salt, urea and ammonium fluoride are dissolved in deionized water, and a nickel-iron layered hydroxide nanosheet precursor is synthesized through a hydrothermal method; secondly, preparing an iron-doped nickel selenide catalyst by adopting a selenylation reaction; the electronic structure of nickel selenide is regulated and controlled by utilizing an iron doping strategy, and the catalytic performance is improved. The prepared iron-doped nickel selenide catalyst has good catalytic activity when being used for hydrogen evolution reaction and sulfur ion oxidation reaction. In a two-electrode sulfur ion oxidation coupling hydrogen production electrolytic tank, the current density of 10mAcm <-2 > can be output only by the voltage of 0.439 V, and the targets of efficient and energy-saving hydrogen production and sulfur ion oxidation upgrading into a high-added-value elemental sulfur product are achieved. The method has the advantages of simple and controllable preparation process, low raw material price, easiness in batch production and the like, and can be used as a catalyst for efficient water electrolysis hydrogen production and sulfur ion oxidation reaction.

The utility model discloses a sulfur powder collecting device with a cleaning function, and relates to the technical field of sulfur product processing, the sulfur powder collecting device with the cleaning function comprises a support frame, a separator main body and a collecting assembly; the separator main body is mounted on the support frame; the collecting assembly is communicated with an inlet of the separator main body; wherein a liquid cooling device is arranged on the outer surface of the separator main body, a cleaning device is arranged in the separator main body, and a collecting hopper is arranged at the lower end of the separator main body; according to the technical key points, the liquid cooling device and the cleaning device are installed on the separator body, the liquid cooling device can achieve cooling of sulfur powder in the machining process and reduce the risk, the liquid cooling device is matched with the cleaning device, the sulfur powder attached to the inner wall of the separator body can be flushed down, leakage of the sulfur powder is avoided, and therefore the content of the sulfur powder in air is effectively reduced; the safety is higher, the using effect is good, and the good using prospect is achieved.

This invention discloses a transition metal phosphide catalyst, its preparation method, and its application, belonging to the field of electrocatalysis technology. The process includes: firstly, dissolving nickel salt, lanthanum salt, urea, and ammonium fluoride in deionized water to synthesize a nickel-lanthanum layered hydroxide nanosheet precursor via a hydrothermal method; secondly, preparing a lanthanum-doped nickel phosphide catalyst using a phosphating reaction; and thirdly, utilizing a lanthanum doping strategy to modulate the electronic structure of nickel phosphide and improve its electrocatalytic reaction performance. This lanthanum-doped nickel phosphide material exhibits good catalytic activity when used to catalyze hydrogen evolution and sulfide ion oxidation reactions. In an integrated two-electrode electrolyzer for sulfide ion oxidation-assisted hydrogen production, it outputs 10 mA cm⁻¹. ‑2 This invention achieves the goal of producing hydrogen and high-value-added sulfur products with low energy consumption by requiring a relatively low voltage of 0.525 V at a current density. It has advantages such as simple preparation process, controllable operating conditions, and low raw material costs, possessing the potential for large-scale production and serving as a high-performance catalyst for electrocatalytic hydrogen production and sulfur ion oxidation reactions.

A smelting method of ultra-low nitrogen steel comprises the following steps: (1) pretreatment of molten iron: carrying out deep desulfurization on the molten iron by adopting a KR method until S is less than or equal to 0.0020 wt% and S in a steel ladle after tapping is less than or equal to 0.0012 wt%; (2) converter smelting, wherein Ar gas bottom blowing stirring is adopted in the whole process; (3) LF refining is conducted, the bottom blowing gas flow at the initial stage of refining is smaller than or equal to 3.0 Nl / (min.t steel), and the electrode electrifying power is smaller than or equal to 70 kW / t steel; the bottom blowing gas flow is smaller than or equal to 7.0 Nl / (min.t steel) in the later stage of electrification, and the electrification power is smaller than or equal to 130 kW / t steel; 4-10 kg of active lime is added to each ton of steel, and the content of CaO in ladle top slag is controlled to be 50-55 wt% after LF refining is finished; and (4) RH refining: starting a vacuum pump of an RH refining furnace for exhausting, before the pressure in a vacuum chamber is reduced to 1kPa, controlling the flow of circulating gas to be 6-8N1 / (min.t steel), reducing the pressure in the vacuum chamber to be less than or equal to 1kPa, and increasing the flow of the circulating gas to be 10-12N1 / (min.t steel). According to the method, on the premise that the sulfur content of the molten steel is smaller than 20 ppm and the smelting cost is not increased, the ultralow-nitrogen and ultralow-sulfur product with the nitrogen content smaller than 30 ppm can be obtained.

This invention discloses a compound additive and its application in removing corrosive sulfur from mineral insulating oil, relating to the field of insulating oil additives. It includes a first inhibitor, a second inhibitor, a first antioxidant, and a second antioxidant. The first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methylbenzotriazole. The first antioxidant is pyrogallol, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. This additive uses a compound inhibitor and a compound antioxidant. When applied to mineral insulating oil, the synergistic effect of the compound inhibitor improves the insulating oil's resistance to corrosive sulfur. Simultaneously, the compound antioxidant and compound inhibitor are balanced to maximize the insulating oil's oxidation resistance, providing continuous and efficient protection for mineral insulating oil in actual operation, resulting in excellent physical and electrical properties.

The present invention discloses a high-temperature electrochemical method and device for fully decomposing hydrogen sulfide to produce hydrogen and sulfur. The method includes the following steps: a gas containing hydrogen sulfide undergoes an electrochemical oxidation reaction at the anode of an electrolytic cell to produce sulfur and protons; the sulfur flows out of the anode chamber of the electrolytic cell in a gaseous state under high temperature conditions and is collected; the protons pass through the solid electrolyte membrane of the electrolytic cell to reach the cathode, and are reduced at the cathode of the electrolytic cell to produce hydrogen; the solid electrolyte membrane is a high-temperature proton conductor, allowing protons to pass from the anode to the cathode under high temperature conditions. The present invention converts hydrogen sulfide into high-value-added products through electrochemical means, achieving the treatment and resource utilization of toxic gases. Compared with traditional electrochemical methods, water is not required as an absorption medium for hydrogen sulfide, the hydrogen sulfide decomposition efficiency is high, and the resulting sulfur product has high purity.

The invention provides a grading and classifying comprehensive utilization method for copper ore waste rocks, which comprises the following steps: crushing and screening the waste rocks to obtain a product with the particle size of-120 + 30mm, a product with the particle size of-30 + 10mm and a product with the particle size of-10mm; the-120 + 30 mm fraction product is subjected to X-ray sorting, and a sorted copper-rich high-sulfur product and a-120 + 30 mm low-sulfur product are obtained; carrying out jigging reselection on the-30 + 10 mm fraction product to obtain a reselected copper-rich high-sulfur product and a-30 + 10 mm low-sulfur product; and jigging and reselecting the product with the particle size of-10mm to obtain a reselected copper-rich high-sulfur product and a low-sulfur product with the particle size of-10mm. The method comprises the steps of waste rock classification, X-ray large block separation and medium and fine particle gravity separation for copper collection, copper-rich high-sulfur products separated from raw materials of different particle fractions are combined as recovered copper ore, and the recovered copper ore is returned to a separation plant for processing; the two-stage process is utilized, the number of equipment is small, the treatment capacity is large, the flow structure is simple, the operation cost is low, and production management is convenient.

The invention discloses a high-efficiency resource recycling process for sulfur-containing components in blast furnace slag, and belongs to the technical field of clean reutilization in the iron and steel industry. The resource recycling method for the sulfur-containing component of the blast furnace slag comprises the following steps: mixing the blast furnace slag with a hydrochloric acid solution, and leaching to obtain sulfur-containing waste gas; mixing a sulfur dioxide-containing gas component with the sulfur-containing waste gas, reacting to obtain sulfur steam, and condensing to obtain a sulfur product. According to the method, rich sulfur substances in the blast furnace slag are utilized, waste gas containing H2S is fully generated in the acid leaching process, then the waste gas is collected, a reasonable recycling process is designed, and efficient conversion and utilization of the sulfur element are achieved; the process is reasonable in overall design, high in operability, safe and stable in system, economical and feasible, and capable of realizing removal and recovery of sulfur elements contained in the blast furnace slag.

The present invention discloses a high-performance insoluble sulfur production system and method. The insoluble sulfur wet production system can be used to produce high-performance insoluble sulfur products through the combination of sulfur polymerization, quenching, crushing, aging, extraction, drying, oil filling and other units. The production system of the present invention is a liquid phase environment, which avoids safety problems such as system blockage and powder explosion caused by solid or powder material transportation. The production process has the characteristics of safety and reliability, simple equipment and operation, and obvious energy saving effect.

The invention provides a copper recovery and sulfur reduction graded utilization process for copper ore waste rocks, which comprises the following steps of: crushing and screening the waste rocks to obtain oversize products and undersize products; performing X-ray sorting on the oversize product to obtain a sorted copper-rich high-sulfur product and a sorted low-sulfur product; finely crushing the separated low-sulfur product, combining with the screen underflow, and screening to obtain a coarse-fraction product, a medium-fraction product and a fine-fraction product; performing jigging reselection on the medium-grade product to obtain a reselected copper-rich high-sulfur product and a reselected low-sulfur product, and performing photoelectric color selection on the reselected low-sulfur product to obtain low-sulfur aggregate and secondary aggregate; and after the fine fraction products are screened, oversize materials and undersize materials are obtained, the undersize materials are subjected to jigging reselection, and reselected copper-rich high-sulfur products and reselected tailings are obtained. The grade of the recovered copper ore meets the requirement for the selected grade of a selection plant, the copper recovery rate is high, and the sulfur content of the waste ore is reduced to the maximum extent; the combined process flow is simple, the system treatment capacity is high, and large-scale implementation is facilitated.

This invention proposes a sulfur purification method combining continuous flow solid-liquid separation and low-temperature sublimation, comprising: S1, physically crushing sulfur raw materials into sulfur particles, placing the sulfur particles in a cleaning solution for ultrasonic cleaning to obtain cleaned sulfur particles; wherein, the cleaning solution is an aqueous solution including at least one cleaning agent selected from sodium carbonate, EDTA, citric acid, phosphate, and silicate; S2, continuously countercurrently immersing the cleaned sulfur particles with an immersion solution, followed by solid-liquid separation to obtain solid sulfur after solid-liquid separation; S3, sublimating the solid sulfur after solid-liquid separation into sulfur vapor at a temperature of 80–110°C and a vacuum of 0.01–10 Pa; S4, condensing the sulfur vapor to obtain solid sulfur. This sulfur purification method effectively reduces energy consumption during the purification process, reduces environmental pollution, and significantly improves the purity of sulfur products, greatly enhancing the energy utilization rate and environmental performance of the entire production process.

The invention discloses a method and system for producing metal and sulfur products through plasma cracking of sulfide ore in the field of sulfide ore clean smelting, and the method comprises the following steps: step S10, raw material pretreatment: the sulfide ore containing lead, zinc, copper and other nonferrous metals is dried and ground to obtain dry fine ore powder with the water content of 1% or below and the particle size of-200 to-50 meshes; s20, plasma gun preparation, wherein cooling circulating water is fed into a plasma gun; and step S30, plasma generation: ionized base gas N2 is sent into a cavity of a plasma gun through another pipeline, and after the plasma gun is powered on, N2 is subjected to arcing ionization between the cathode and the anode to form plasma with the temperature of 1500 DEG C or above. The method provided by the invention is rapid and thorough in sulfide cracking, shortens the smelting process, improves the production efficiency, avoids the generation of a large amount of SO2-containing pollution gas, reduces the pollution to the environment, realizes high-value utilization of sulfur, simplifies the process flow, and reduces the equipment investment and operation cost of enterprises.

The invention discloses an oil and gas field sewage desulfurization method, and relates to the field of oil and gas field sulfur-containing sewage treatment. Comprising the following steps: adjusting the pH value of the sulfur-containing sewage to 8.0-9.0, and adding a sulfur particle regulating agent; adding a composite complex iron catalyst into the treated sewage, and carrying out catalytic oxidation reaction under the condition that the concentration of dissolved oxygen is controlled to be 2-8mg / L; adding an air flotation separating agent to separate the generated sulfur particles from the water phase to obtain sulfur-enriched foam and desulfurization sewage; a redox regulator is added into the separated desulfurization sewage, and the activity of the catalyst is recovered by controlling the redox potential within the range of 150-250 mV; and a flocculating agent and a pH regulator are added, so that the treated water quality reaches the discharge standard. According to the method, sulfide in the high-concentration sulfur-containing sewage can be stably reduced to 0.5 mg / L or below, the desulfurization efficiency far exceeds 99.9%, the purity of a sulfur product is larger than or equal to 99.5%, the treatment effect is stable and reliable, and the sulfur recovery rate is larger than or equal to 93.2%.

The invention belongs to the field of daily chemicals, and discloses a preparation method of colloidal sulfur, which specifically comprises the following steps: mixing sulfur-containing dispersoid with Arabic gum and water-soluble oat flour, grinding to obtain a ground product, and freeze-drying or drying the ground product under reduced pressure. According to the method, Arabic gum and water-soluble oat powder are adopted as composite coating materials for coating, a colloidal sulfur product with the D50 particle size of 4.5-10 microns can be obtained through grinding and a drying process, and compared with a traditional colloidal sulfur product, the colloidal sulfur product is better in coating stability, higher in coating rate, lower in irritation and capable of better achieving the effects of removing oil, controlling acnes, removing dandruff and controlling oil. Meanwhile, the invention also discloses application of the colloidal sulfur.

The invention discloses a compound additive and application thereof in removing corrosive sulfur products in mineral insulating oil, and relates to the field of insulating oil additives. Comprising a first inhibitor, a second inhibitor, a first antioxidant and a second antioxidant, the first inhibitor is a benzotriazole derivative, and the second inhibitor is a thiadiazole derivative and / or methyl benzotriazole; the first antioxidant is pyrogallic acid, and the second antioxidant is butylated hydroxytoluene and / or tert-butylhydroquinone. According to the additive, the compound inhibitor and the compound antioxidant are adopted, when the additive is applied to the field of mineral insulating oil, the corrosion and sulfur resistance of the insulating oil is improved through the synergistic interaction effect of the compound inhibitor, and meanwhile the oxidation resistance of the insulating oil is improved to the maximum extent through mutual balance of the compound antioxidant and the compound inhibitor; and continuous and efficient protection is provided for the mineral insulating oil in actual operation, so that the physical property and the electrical property of the mineral insulating oil are excellent.

The invention provides a combined membrane method resourceful treatment device and process for a desulfurization solution, and belongs to the technical field of industrial wastewater treatment. The device comprises a plate-and-frame filter press, a homogeneous membrane / reverse osmosis membrane, a nanofiltration membrane, an activated carbon decoloration tank, an evaporator, a first cooling pelleter, an ultrasonic-assisted ozone centrifugal reactor, a sulfur melting kettle, a second cooling pelleter, an ultrafiltration membrane and a bipolar membrane. By means of the synergistic effect of ultrasonic cavitation and ozone oxidation, thiosulfate is efficiently decomposed, elemental sulfur is directionally generated, and a high-quality sulfur product is obtained by matching with refining of the sulfur melting kettle; meanwhile, thiocyanate and sulfate / thiosulfate are accurately separated through a nanofiltration device, a high-purity thiocyanate product is produced through activated carbon decoloration and evaporation concentration, then bipolar membrane electrodialysis is used for directly converting sulfate into recyclable acid and alkali, various high-value resources are systematically recycled, and the method is suitable for industrial production. The problems of low resource recovery rate and insufficient product purity of the traditional process are solved.

The invention discloses a continuous production process of high-dispersity insoluble sulfur, and particularly relates to the technical field of chemical engineering. The process comprises the following steps: calcining pyrite under an oxygen-enriched condition to generate sulfur dioxide, and converting the sulfur dioxide into a sodium sulfite solution; adding excessive elemental sulfur into the solution to generate a polysulfide precipitate; collecting hydrogen sulfide gas and active sulfur while performing acidolysis precipitation; hydrogen sulfide and sulfur dioxide are mixed in proportion, and high-purity sulfur is regenerated through catalysis of gamma-aluminum oxide; mixing the regenerated sulfur with active sulfur, and carrying out high-temperature gasification polymerization at 700-750 DEG C under the protection of nitrogen; then the sulfur steam is in countercurrent contact with low-temperature water mist through a granulation tower and is rapidly cooled and solidified into fine particles; and finally performing vacuum drying to obtain a finished product. Through material circulation and process integration, sulfur source activation, long-chain polymer structure directional regulation and control and accurate control of particle morphology are realized. The obtained insoluble sulfur product has high insoluble content, fine and uniform particle size and excellent thermal stability.

The utility model discloses sulfur product transfer equipment, and relates to the technical field of sulfur product processing, the sulfur product transfer equipment is applied to transportation of sulfur particles in a production workshop, the sulfur product transfer equipment comprises a conveying track, a transfer trolley, a storage box body, a feeding assembly and a discharging pipe fitting, the conveying track is arranged on the ground of the production workshop; the transfer trolley is arranged on the conveying track and runs along the conveying track; the storage box body is fixedly mounted on the transfer trolley; the feeding assembly used for being connected with a discharging pipe of sulfur particle processing equipment is installed at the position, close to one side, of the upper end face of the storage box. The discharging pipe fitting is installed on the side end face, away from the feeding assembly, of the storage box. According to the technical key points, safe storage and conveying of sulfur particles can be achieved, the safety of sulfur product processing is guaranteed, pipeline connection is convenient during feeding and discharging, and the sulfur particle conveying device can be suitable for processing equipment with different heights and different inclination angles, is high in applicability and good in using effect and has a good using prospect.

This invention discloses a method for recovering high-purity sulfur from hydrometallurgical zinc slag. The method involves washing, drying, grinding, and sieving the hydrometallurgical zinc slag, then mixing it with a water-ethylene glycol solvent and adjusting the pH to the range of 2-10. The mixture is then transferred to a high-pressure reactor for a solvothermal reaction under mechanical stirring. After the reaction is complete, the mixture is cooled to room temperature, and the solid product is separated by water washing to obtain sulfur-rich slag and metal-enriched residue. The sulfur-rich slag is then physically cut to remove surface impurities, yielding the high-purity sulfur product. This method combines high-pressure solvothermal reaction with physical cutting to separate sulfur from metallic impurities in hydrometallurgical zinc slag, obtaining a high-purity sulfur product. This reduces the accumulation of sulfur-containing waste and the loss of sulfur resources. Furthermore, this method is simple, economical, and efficient, providing a new approach for the treatment of sulfur-containing waste.

The invention discloses a pyrite sulfur product recovery device, and relates to the technical field of pyrite recovery devices, the pyrite sulfur product recovery device comprises a bottom plate, the top of the bottom plate is provided with a grinding assembly used for grinding a pyrite sulfur product into powder, and one side of the grinding assembly is fixedly communicated with a crushing assembly used for crushing pyrite sulfur product particles. According to the pyrite sulfur product recovery device, the grinding assembly is arranged, the motor drives the worm to rotate through the output shaft, the worm is in meshing transmission with the turbine, the second rotating shaft is directly driven to rotate, power of the grinding assembly is synchronously transmitted to the crushing assembly, and when the second rotating shaft rotates, on one hand, the crushing assembly is driven to operate in order; two-stage crushing of the pyrite is completed; and on the other hand, a grinding roller and a grinding plate of the grinding assembly work synchronously, and the crushed pyrite particles can directly enter the grinding assembly to be ground through a communication channel between a crushing box and a cylindrical plate.

The utility model discloses a weighing device for sulfur product proportioning, and relates to the technical field of sulfur weighing, the weighing device comprises a weighing hopper, a fixing ring frame, a weighing device and a switching sealing plate, a lap joint ring is processed on the outer wall of the middle of the weighing hopper, a rotary actuator is connected to the center of the switching sealing plate in an assembled mode, a circular truncated cone sleeve is coaxially arranged at the bottom of the weighing hopper, and the circular truncated cone sleeve is connected with the rotary actuator in an assembled mode. A C-shaped groove is machined in the circular truncated cone sleeve, an erecting platform is assembled at the bottom of the fixing ring frame, and a plurality of guide vertical rods are integrally formed at the top of the fixing ring frame; according to the technical key points, a lap joint circular ring is machined on the outer wall of a weighing hopper, a plurality of weighing devices are arranged between a fixed ring frame assembled at the top of an erecting platform and the lap joint circular ring, sulfur fed into the weighing hopper can be weighed, and when a rotary actuator controls a switching sealing plate to rotate and the edge of the switching sealing plate is separated from the bottom of the weighing hopper, the weighing devices can be switched to the lap joint circular ring. Sulfur can be completely released to the bottom, and the situation that the sulfur remains in a connecting area of the weighing hopper and the switching sealing plate is avoided as much as possible.

The utility model discloses circulating heating equipment for sulfur product processing, which relates to the technical field of sulfur product processing and comprises a heater, a heating cylinder is placed in the heater, and the circulating heating equipment for sulfur product processing is provided with a stirring plate, a rotating pipe and a transmission rod. The output end of the servo motor drives a second transmission gear to rotate, so that the second transmission gear drives a stirring plate to rotate in the circumferential direction through a driving column, and meanwhile, the driving column rotates to drive a first transmission gear to move circumferentially along the interior of a gear ring, so that a transmission rod drives a worm gear through a worm part to drive a rotating pipe to rotate; when the driving column rotates, the driving column drives the scraping plate to move circumferentially along the inner cavity of the heating cylinder through the scraping column, so that sulfur particles on the inner wall of the heating cylinder are scraped off, and meanwhile, sulfur particles on the inner wall and the bottom of the heating cylinder can be scraped off; therefore, the sulfur particles in the inner cavity of the heating cylinder are uniformly heated.

The invention belongs to the field of petrochemical engineering, and particularly relates to a method for decomposing hydrogen sulfide through electro-catalysis. The method is characterized in that a reaction system of an organic ammonium salt electrolyte solution based on carbon disulfide is used for preparing the organic ammonium salt electrolyte solution based on carbon disulfide by blending a plurality of organic ammonium salts and an organic solvent in proportion, an electrocatalytic H2S decomposition process is formed by combining an electrochemical device, and foamed nickel is used as an electrode. The method is characterized in that H2S is subjected to electrocatalysis by adopting a one-pot method under the conditions of room temperature, normal pressure and constant voltage, H2S is decomposed into sulfur and H2, sulfur is recovered through rotary evaporation, and H2 and sulfur products are obtained at the same time. According to the process, sulfur and H2 can be obtained through efficient electro-catalysis of hydrogen sulfide under the mild conditions of room temperature, normal pressure and the like.

The invention provides a material suitable for hydrogen sulfide adsorption catalysis and a preparation method and application thereof. The preparation method sequentially comprises the steps of biomass-based porous carbon carrier preparation, copper-iron double-metal gradient doping, in-situ reduction, active site construction and powder forming. Firstly, a biomass raw material and a sodium alginate pore-forming agent are adopted to synergistically prepare hierarchical porous carbon, the specific surface area is large, the hierarchical pore structure can simultaneously meet the requirements for rapid diffusion of H2S and efficient storage of sulfur products, and the problem of sulfur blockage is solved. Secondly, through gradient doping, dispersing agent regulation and control and in-situ reduction processes, active sites are fully exposed, and the H2S penetration capacity is large; moreover, weak-medium alkaline sites are formed through adjustment of K2CO3, H2S dissociation is promoted, sulfate side reaction is inhibited, and the sulfur selectivity exceeds 95%.

The invention provides a method for recovering copper and sulfur in low-grade copper-molybdenum ore, which comprises the following steps: crushing and grinding raw ore, carrying out copper-molybdenum mixed roughing, separating molybdenum ore from part of copper ore in the raw ore, separating the copper ore from the molybdenum ore through flotation operation of copper-molybdenum separation, and obtaining molybdenum concentrate and copper concentrate I; and flotation is conducted on tailings obtained after copper and molybdenum mixed roughing, and copper concentrate II and sulfur concentrate are obtained finally. According to the method, by the adoption of the technological process of preferentially recovering copper and then separating copper and sulfur to recover copper and sulfur products, segmented recovery of low-grade copper is achieved, meanwhile, comprehensive recovery of sulfur is also achieved, the mode that copper and molybdenum are separated firstly and then copper and sulfur are separated can reduce interference of sulfur ore in the copper-molybdenum separation process, and meanwhile the situation that sulfur ore is separated in the copper-sulfur separation process can be reduced. Therefore, mutual inclusion among the ores is reduced, the separation efficiency is improved, meanwhile, the ores are comprehensively recovered, and the method has the characteristic of reducing resource waste.