221 results about "Reducing atmosphere" patented technology

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses an oxygen evolution-free sodium carbonate composite material as well as a preparation method and application thereof. The preparation method of the composite material comprises the following steps: carrying out powder refinement treatment on a sodium carbonate precursor to obtain particles with the average particle size from micron to nanoscale; s2, uniformly mixing the sodium carbonate precursor treated in S1 with a conductive carbon material to form a composite precursor; placing the composite precursor in an inert atmosphere or a reducing atmosphere, calcining the composite precursor at 400-900 DEG C, and then cooling the composite precursor to room temperature to obtain the oxygen evolution-free sodium carbonate composite material, wherein the conductive carbon material is a high-specific-surface-area carbon material of which the surface is rich in at least one of carbonyl, carboxyl and hydroxyl. The composite material obtained by the method disclosed by the invention is applied as a pre-sodium-modified additive, so that the decomposition voltage of the pre-sodium-modified additive can be greatly reduced, and oxygen evolution is effectively inhibited, thereby improving the first-week coulombic efficiency, cycling stability and overall safety performance of the sodium-ion battery.

This invention belongs to the field of catalyst technology, providing a CO purification oxygen-rich catalyst, its preparation method, and its application. The preparation method involves dispersing γ-alumina in water, then sequentially adding copper nitrate and cerium nitrate to obtain a reaction solution. The reaction solution is mixed with an inorganic base, followed by a substitution reaction and a crystallization reaction to obtain a catalyst precursor. The catalyst precursor is calcined under a reducing atmosphere to obtain the CO purification oxygen-rich catalyst; the reducing atmosphere includes hydrogen. This preparation method generates sufficient active sites through a copper-cerium binary system, and then utilizes the basic groups provided by the inorganic base to form a low-valence metal-hydroxyl composite structure under a reducing atmosphere. Through the combined action of metal atoms, hydroxyl groups, and active oxygen sites, the research goals of high efficiency, stability, high selectivity, and economy are achieved. Furthermore, this preparation method does not use precious metals, resulting in low cost.

The invention relates to the technical field of solid waste harmless and recycling equipment, in particular to a gradient temperature pyrolysis-melting vitrification integrated treatment device and process for red mud. According to the device, an electromagnetic heating rotary kiln pyrolysis section and an electrode melting section are directly coupled with a material transfer device through high-temperature atmosphere isolation. The process comprises the following steps: granulating red mud, a reducing agent and a flux, feeding into a rotary kiln of which the temperature is accurately controlled by multiple groups of electromagnetic induction coils in a partitioned manner, and sequentially completing dehydration, selective reduction and iron particle polymerization to produce gt; high-temperature pyrolysis slag at 1000 DEG C; the pyrolysis slag directly falls into an electric melting pool to complete melting and iron-slag liquid phase separation under absolute isolation of reducing atmosphere and oxidizing atmosphere by the device, and pig iron and a stable glass body are respectively obtained. Through the design of'hot slag direct melting 'and'energy closed loop', the problems of high energy consumption and complex flow of the traditional process are solved, and efficient recovery of iron resources in the red mud and thorough harmless and high-valued utilization of the residues are realized.

The invention discloses a low-energy-consumption method for preparing high-metallization-ratio reduced iron blocks from laterite-nickel ore high-pressure acid leaching residues, and belongs to the technical field of metallurgical solid waste recycling. The method comprises the following steps: performing low-temperature reduction roasting on the laterite-nickel ore high-pressure acid leaching residues in a reducing atmosphere to obtain primary roasted sand; carrying out high-temperature desulfurization roasting on the primary roasted product in a non-reactive atmosphere to obtain a final roasted product; and carrying out hot press molding on the final roasted product to obtain the reduced iron block. According to the method, the technological process of reduction, desulfurization and hot pressing is adopted, the method has the advantages that the process is compact, energy consumption is low, iron and sulfur elements are easy to recover and the like, the laterite-nickel ore high-pressure acid leaching residues can be efficiently converted into high-quality reduced iron blocks with high strength, low impurity and high metallization ratio, high-concentration SO2 meeting the acid making requirement is synchronously obtained, and the method is suitable for industrial production. According to the method, large-scale and high-valued clean utilization of iron and sulfur resources in the laterite-nickel ore high-pressure acid leaching residues is achieved, and the method is mild in technological condition and stable in operation and has a good industrial application prospect.

This invention relates to the field of comprehensive utilization of solid waste, specifically providing a process for treating ilmenite ore using solid waste pyrolysis products. The process involves preheating the ilmenite ore to above 1000°C with low-oxygen flue gas, then feeding it along with waste plastics, waste coke, and other raw materials into a pyrolysis reduction reactor for pyrolysis reduction. The pyrolysis of waste plastics and waste coke generates reducing gases, ensuring the device is completely in a reducing gas atmosphere. These gases react with the ilmenite ore at high temperatures to generate magnetically separable elemental iron and Fe3O4, thereby increasing the actual FeTiO3 content. Compared to existing ilmenite ore processing technologies, this method significantly increases the processing temperature, improves processing efficiency, and achieves comprehensive energy utilization.

The application discloses a method for comprehensively recovering valuable metals in gold smelting slag, and belongs to the technical field of metallurgical solid waste resource utilization, and comprises the following steps: S1, ingredient mixing: uniformly mixing gold smelting slag, a chlorinating agent and a reducing agent according to a mass ratio, preparing into a pellet, and obtaining a mixture; S2, one-step chlorination and reduction roasting: after the mixture obtained in the step S1 is dried, the mixture is sent into a roasting furnace to be roasted, and chlorination volatilization of the valuable metals and reduction magnetization of iron oxides are simultaneously completed in the same roasting system; through accurate proportioning of the chlorinating agent and the reducing agent and synergistic regulation of the roasting temperature and the weak reducing atmosphere, the chlorination volatilization of gold, silver, copper, lead and zinc and the reduction magnetization of iron oxides are simultaneously completed in a single reactor and in the same roasting process, the problems of mutual contradiction between chlorination and reduction atmosphere and mutual restriction of recovery rates of two-step roasting processes are solved, the total roasting time is effectively shortened, and the comprehensive energy consumption is effectively reduced.

The invention relates to the technical field of metallurgical coking, and provides a devitrification and CO erosion resistant zero-expansion silica brick and a preparation method thereof.The devitrification and CO erosion resistant zero-expansion silica brick is prepared from, by weight, 3-10 parts of nanoscale alpha-Al2O3, 15-35 parts of andalusite, 30-40 parts of high-purity fused mullite, 10-20 parts of superfine silica powder, 2-5 parts of silica sol binding agent and 3-5 parts of composite mineralizer. Through the synergistic effect of the design of the composite mineralizer and the stepped heat treatment process, the technical problems that the existing zero-expansion silica brick is easy to devitrify and crystallize fused quartz, poor in CO erosion resistance and lack of crystallization degree during long-term use at high temperature are solved; the thermal shock cycle index and the high-temperature breaking strength of the material can be improved, the formation of alpha-cristobalite crystallization peak is effectively inhibited, and the mass loss is reduced in a reducing atmosphere, so that the structural stability of the material is enhanced, and the service life of the material is prolonged.

The present invention relates to the technical field of cement production and in particular to a calcination system and a calcination process for low-carbon cement clinker. The calcination system comprises: a kaolin calcination assembly comprising a preheater and a decomposition furnace; wherein the preheater is provided with a multi-stage cyclone; wherein the preheater is provided with an inlet and an outlet; wherein the decomposition furnace is provided with a fuel inlet and a raw material inlet; wherein the raw material inlet is connected to the outlet; wherein the decomposition furnace calcines to produce activated kaolin; wherein the calcination temperature in the decomposition furnace is between 700°C and 850°C, the calcination time is between 0 and 1.5 hours, and the calcination atmosphere in the decomposition furnace is an oxygen-rich atmosphere or a CO reduction atmosphere.and a cement calcining unit configured for calcination to produce cement clinker; wherein the activated kaolin is added to the outlet side of the cement calcining unit in a predetermined proportion of the activated kaolin in the cement clinker. It can reduce the use of carbon-containing feedstocks in clinker production, decrease the carbon emissions of the clinker, and adjust the hydration rate of the cement clinker.

The invention relates to a copper microsphere and a preparation method and application thereof. The preparation method of the copper microspheres comprises the following steps that mixed powder containing copper oxide powder and graphite powder is subjected to first heat treatment in a reducing atmosphere, the copper oxide powder in the mixed powder is reduced into copper powder, and mixed copper powder is obtained; the mixed copper powder is subjected to second heat treatment, copper powder in the mixed copper powder is molten, and copper liquid is obtained; the molten copper is rapidly cooled to the temperature below the copper melting temperature, the molten copper is solidified into copper microspheres, the graphite powder is removed, and the copper microspheres are obtained; wherein the extremely fast cooling time is less than or equal to 5 ms. According to the preparation method, the sphericity degree of the copper microspheres can be effectively improved.

The invention discloses a process for dealkalizing and deeply reducing red mud through gradient temperature control treatment, which comprises the following steps: 1) accurately metering raw materials and grinding; 2) feeding the ground raw materials into a red mud stirrer, and stirring at a gradient rotating speed; 3) feeding the stirred and mixed raw materials into a granulator for granulation, and pressing the materials into particle materials with the particle size of 5-15mm; 4) feeding the particle material into a dealkalization solid-phase reaction device, and forming a particle material after a solid-phase reaction in a reducing atmosphere; (5) feeding the particle material after the solid-phase reaction into a cooling machine, and slowly cooling in a furnace by adopting a nitrogen direct circulating cooling method; 6) crushing the cooled material by a crusher until the particle size is less than 5mm; 7) performing magnetic separation on the ground powder by a high-gradient magnetic separator.According to the method, efficient dealkalization and iron element reduction separation are realized through high-temperature dealkalization pre-reduction and high-temperature deep reduction melt separation.

The disclosure relates to the technical field of cement manufacturing, and specifically relates to a calcination system and method for low-carbon cement clinker. The calcination system includes: a kaolin calcination assembly including a preheater and a decomposition furnace, where the preheater is provided with a multi-stage cyclone cylinder; the preheater is provided with a feed port and a discharge port; the decomposition furnace is provided with a fuel adding port and a raw material inlet; the raw material inlet is connected to the discharge port; activated kaolin is generated by the decomposition furnace through calcination; and the decomposition furnace has a calcination temperature of 700° C. to 850° C. and calcination time of 0 h to 1.5 h, and a calcination atmosphere in the decomposition furnace is an oxygen-enriched atmosphere or a CO reducing atmosphere; and a cement calcination assembly configured to generate cement clinker through calcination, where the activated kaolin is added to a discharge side of the cement calcination assembly according to a predetermined ratio of the activated kaolin to the cement clinker. Use of carbon-containing raw materials in clinker production and carbon emissions of clinker are reduced, and a hydration rate of the cement clinker is adjusted.

The invention discloses an electrolytic water hydrogen production and gas supply system for a ceramic sintering furnace, which belongs to the technical field of special gas delivery and comprises an electrolytic bath, a hydrogen storage tank and a power system. The interior of the hydrogen storage tank is divided into a first hydrogen storage cavity and a water storage cavity through a first piston. The power system comprises a water storage tank, a pump machine and a push cylinder. The system produces hydrogen through the electrolytic cell and conveys the hydrogen to the first hydrogen storage cavity, volume and pressure adjustment is achieved by means of liquid force transmission, and linkage control over storage, pressurization and conveying of the hydrogen is completed. The first piston physically isolates hydrogen from liquid, water vapor is prevented from being mixed into hydrogen, the low-dew-point requirement is guaranteed, and the stable reducing atmosphere in the sintering furnace is maintained. And oxygen generated by electrolysis is further introduced into a push cylinder to serve as a driving source, oxygen pressure energy is converted into mechanical energy to assist hydrogen pressurization and conveying, and efficient utilization of system energy and stable regulation and control of gas supply are achieved through the synergistic effect with liquid regulation.

The invention provides a porous carbon material for high-temperature flue gas filtration, and a preparation method and application thereof, and the preparation method comprises the following steps: mixing carbon powder, a metal oxide and an adhesive to obtain prefabricated carbon particles; sintering the prefabricated carbon granules in a reducing atmosphere to obtain sintered carbon granules; roasting the sintered carbon granules in a chlorine atmosphere to obtain roasted carbon granules and roasted flue gas; the roasted carbon particles are subjected to acid pickling and then dried, and the porous carbon material for high-temperature flue gas filtration is obtained. The mixing mass ratio of the carbon powder to the metal oxide to the adhesive is 1: (0.25 to 0.5): (0.15 to 0.3). The preparation method is simple in steps and convenient to operate. And the prepared porous carbon material has a relatively high specific surface area, and meets the high-performance requirements of the fields of industrial production and the like on a high-temperature flue gas filtering material.

The invention relates to the technical field of new energy materials, in particular to a trimetal iridium-based anode catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving iridium salt, lead salt and ruthenium salt in a hydrochloric acid solution, adding a carbon carrier, and carrying out pretreatment to obtain precursor powder; the precursor powder is alloyed in a reducing atmosphere, and carbon-supported uniformly-distributed trimetal nanocrystalline powder is obtained; and annealing and oxidizing the trimetal nanocrystalline powder in an oxidizing atmosphere to obtain a trimetal iridium-based oxide in which iridium, lead and ruthenium are uniformly distributed, namely the trimetal iridium-based anode catalyst. According to the preparation method, the iridium salt, the lead salt and the ruthenium salt are dissolved with the hydrochloric acid solution and added into the carbon carrier, then alloying and annealing oxidation are performed to prepare the uniformly-distributed three-metal iridium-based oxide, the preparation process is simple, production can be effectively expanded, and low-iridium-load and stable high-current-density operation can be achieved.

The present invention provides a method for providing a composite luminescent particle, comprising: (a) providing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof, A comprising one or more of yttrium, lutetium, gadolinium, lanthanum; b comprises one or more rare earth elements; c comprises one or more of aluminum, gallium and scandium; d comprises one or more transition metal ions; 0 < = x < = 1, 0 < = y < = 1, x + ygt; 0; and (ii) also providing an oxide material precursor, the oxide material having a melting point of at least 850 DEG C; (b) mixing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof with (ii) an oxide material precursor; (c) curing the oxide material precursor to obtain cured particles which comprise a luminescent material and an oxide material coating layer; (d) heating the cured particles at a first temperature of 600 DEG C or more for a first duration of 10 minutes or more; and (c) heating the cured particles at a second temperature of 700 DEG C or more for a second duration of 1 hour or more in a reducing atmosphere including carbon monoxide.

The invention provides a metallurgical furnace for multi-stage smelting and dilution of copper-nickel sulfide ore, and belongs to the technical field of non-ferrous metal pyrometallurgy equipment. The device is provided with a first-stage space smelting area, a second-stage molten pool smelting area, a third-stage molten pool reduction smelting area and a fourth-stage depletion smelting area which are communicated in sequence; a feeding nozzle and a spray gun are arranged at the top of the first-stage space smelting area to realize material pre-oxidation and impurity volatilization, and a side-blowing spray gun is arranged in the second-stage molten pool smelting area to finish deep smelting and slag-matte separation; a third-stage molten pool reduction smelting area is provided with a spray gun to create a reducing atmosphere, and impurities such as lead and zinc are selectively reduced and volatilized to be removed; a controllable polarity electrode and a sulfuration reducing agent feeding hole are arranged at the top of the fourth-stage depletion smelting area, so that electromagnetic stirring, chemical reduction sulfuration and the like are realized. Through multi-zone collaborative design and functional coupling, the problems that in the existing copper-nickel sulfide ore pyrogenic process, the smelting strength is improved, the adaptability to raw materials is poor, the slag dilution efficiency is low, and impurity valuable metal elements are difficult to enrich are solved.

This invention relates to a confined pyrolysis-derived axially oxygen-coordinated iron single-atom material with iron clusters, its preparation method, and its applications. It focuses on single-atom catalysts, addressing the technical problems of low activity, poor stability, and poor mass transfer capacity in existing Fe-N-C catalysts. The material consists of a spherical conductive substrate and axially oxygen-coordinated iron single atoms and iron clusters supported on the substrate. Preparation: A bifunctional silica template strategy is employed, using an inner layer of silica as a sacrificial template to construct a cavity structure and provide axial coordination. An outer layer of silica is used to maintain a reducing atmosphere. Through the synergistic effect of confined pyrolysis and template etching, the specific surface area of ​​the material is increased, and the exposure of active sites is enhanced, achieving synergistic catalysis of iron single atoms and iron clusters. This material exhibits a half-wave potential of 0.91 V in 0.1 M KOH and decays by only 2 mV after 10,000 cycles. It can be used in the field of electrocatalysis.

This invention discloses a nitrogen-based, fully flowable amination method for molybdenum-based materials, comprising the following steps: S1, pretreating the molybdenum-based material in a reducing atmosphere; S2, subjecting the pretreated molybdenum-based material to high-temperature nitridation at a first temperature in a nitrogen-containing gas atmosphere to form a molybdenum nitride catalyst with a core-shell structure, wherein the core layer is metallic molybdenum and the shell layer is molybdenum nitride; S3, after lowering the ambient temperature to a second temperature, introducing alcohol vapor to contact the molybdenum nitride catalyst for an amination reaction to generate amine products; S4, continuously collecting the amine products using an acidic absorbent; S5, repeating steps S2-S4 to achieve continuous production. This invention uses molybdenum as the catalytic active center, first nitriding and cracking nitrogen gas at high temperature to generate active nitrogen species, which then react with alcohols to generate corresponding amine substances.

The application discloses a kind of yellow phosphate long afterglow luminescent material and preparation method thereof, the chemical formula of the luminescent material is Rb 1.9 Ba 0.1 Sr 1‑x P2O7: x Eu 2+ ;0.0025≤x≤0.005, the stoichiometric ratio of each raw material in chemical formula is weighed, Rb is introduced by carbonate, Sr and Ba are introduced by carbonate, oxide or nitrate, P is introduced by NH4H2PO4 Or (NH4) 2HPO4, Eu is introduced by Eu2O3;Each raw material is mixed and ground sufficiently to obtain raw material powder;In reducing atmosphere and certain temperature, it is cooled to room temperature with furnace, and is ground to obtain yellow phosphate long afterglow luminescent material.The preparation method is simple, pollution-free, without adding cosolvent, low in cost, suitable for large-scale industrial production, and can obtain yellow long afterglow luminescent material with long afterglow time, high intensity and other advantages.

The invention discloses a water-resistant sulfur-resistant catalyst, which is prepared by the following method: uniformly dispersing platinum salt in a water suspension of an M-SnO2 carrier, stirring and drying to obtain a load precursor; and then carrying out reduction treatment in a reducing atmosphere to obtain the Pt / M-SnO2 catalyst, namely the water-resistant and sulfur-resistant catalyst. The invention further discloses application of the water-resistant and sulfur-resistant catalyst in steel sintering flue gas treatment, catalytic oxidation of CO in complex atmosphere environments containing water vapor, sulfur and the like can be achieved, high activity and stability can be kept, and an efficient and reliable solution is provided for purification of steel sintering flue gas.

The application discloses a sludge incineration device and method for a rotary kiln with staged air distribution and flue gas recirculation, which sends sludge and primary air into the rotary kiln from the kiln head; sends secondary air from the kiln head to the ignition section of the rotary kiln; and sends recirculated flue gas from the kiln head to the stable combustion section of the rotary kiln. The staged air distribution can form an oxygen-deficient fuel-rich zone in the initial combustion stage to inhibit the generation of NO x ; and the remaining air required for combustion is sent in the form of secondary air in the later combustion stage to make the fuel burn out; the flue gas recirculation can moderately reduce the oxygen content in the furnace and strengthen the reducing atmosphere in the combustion zone, which is beneficial to further reducing the emission of NO x in the sludge incineration process. The application uses the staged air distribution and flue gas recirculation, not only reduces the emission of NO x , but also avoids the problem that the SNCR method commonly used in the denitration of the rotary kiln incinerator needs to add ammonia water and external equipment, thereby reducing the operation cost and having good economic efficiency and application prospect.

The application discloses a forming process of acid-resistant ceramic products, and aims to solve the problem of poor acid resistance of ceramics caused by microstructure defects and grain boundary impurities in the prior art. The steps of the process comprise the following: firstly, the surface of main raw material particles containing alumina and silicon dioxide is chemically modified, and a nanoscale metal oxide coating layer with high chemical inertness is generated in situ on the surface of the particles. Then, the modified powder is prepared into a high-uniform-density ceramic green body by using a gradient pulse pressure forming method, so as to eliminate internal defects. In the sintering step, a controllable atmosphere multi-stage treatment is adopted: firstly, high-temperature purification is carried out in a weak reducing atmosphere, so that the inherent alkali metal oxide impurities in the raw material are removed in the form of gas phase; and then, the inert atmosphere is switched to complete the final densification sintering. The acid-resistant ceramic product prepared by the process has the characteristics of high density and enhanced acid corrosion resistance.

The utility model provides a staged burner and a steam coil thereof. The steam coil pipe comprises a water inlet pipe, a heated coil pipe and a steam ejection ring pipe which are sequentially connected, the heated coil pipe is spiral, the diameter of the inner ring contour of the steam ejection ring pipe is larger than that of the outer ring contour of the heated coil pipe, and a plurality of steam outlet holes are formed in the steam ejection ring pipe. Water enters from a water inlet pipe of the steam coil pipe to cool primary flame combusted in the fire protection barrel, local high temperature is prevented, NOx emission of a primary combustion area is reduced, meanwhile, steam generated by heating is sprayed out from a steam outlet hole of the steam spraying ring pipe, and the steam and secondary air participate in secondary combustion after being mixed in a secondary air shell. OH and H groups generated by decomposition of the water vapor can be subjected to chain reaction with CO generated by primary combustion, the reducing atmosphere is enhanced, NO in-phase reduction reaction is facilitated, meanwhile, H and OH free radicals generated by dissociation of the water vapor can inhibit oxidation of HCN to NO, and the generation amount of NO is reduced under the combined action of the H and OH free radicals and the CO free radicals.

This invention relates to the field of pulverized coal distributor technology and discloses an intelligent uniform distribution blast furnace pulverized coal injection device, comprising: a conical distribution chamber, the distribution chamber including a lower cone and an upper cone cover detachably installed on the top of the lower cone, the bottom of the lower cone being fixedly connected to a pulverized coal supply pipe. This intelligent uniform distribution blast furnace pulverized coal injection device can achieve long-term stable uniform distribution and maintenance-free operation; by utilizing the rotating airflow formed by the built-in guiding element, the pulverized coal is fully mixed and evenly distributed within the chamber before being distributed, resulting in minimal deviation in the amount of pulverized coal at the outlet of each branch pipe, ensuring consistency in pulverized coal injection at all tuyeres. This is crucial for stable blast furnace operation, reducing fluctuations in furnace temperature and reducing atmosphere caused by uneven distribution, and the unique coarse particle settling tank design significantly improves anti-clogging performance: coarse particles and foreign matter are actively separated and collected, preventing them from entering the outlet pipe and avoiding the risk of blockage in the outlet pipe previously observed.

The invention discloses a cold annealing and pickling method for 430 ferritic stainless steel, belongs to the field of ferrous metallurgy production, and solves the problem that oxide skin is easy to form on the surface of 430 ferritic stainless steel strip steel. The method comprises the following steps of: removing residual rolling oil on the surface of the 430 ferrite stainless steel strip steel in a degreasing section procedure; an annealing furnace temperature control mode is adopted, furnace pressure control of the annealing furnace is stabilized according to the thickness of the strip steel, and the residual oxygen amount of the five heating sections is controlled to be 0.05% or below; and an electrolytic neutral salt section procedure: adopting an electrolytic negative plate made of a stainless steel material, controlling the pH value of the electrolyte to be 3-4, increasing the long circulation volume of neutral salt, and measuring the density of the electrolyte on site. The defects of yellow spots, whitening and the like on the surface of strip steel during cold annealing and pickling production of 430 stainless steel are overcome; the atmosphere of the annealing furnace is stabilized, and the high-temperature section generates the reducing atmosphere by adjusting the air consumption coefficient. Therefore, continuous oxidation of the high-temperature section is restrained.

The invention discloses a manufacturing process for manufacturing a lithium manganese iron phosphate composite positive electrode particle, which is applied to a positive electrode of a solid-state or solid-state-like battery. The preparation process comprises the following steps: taking a plurality of lithium ion conductor particles, a plurality of LMFP particles, a carbon source and a dispersing agent, and simultaneously putting the materials into a ball mill for mixing to form mixture slurry; the carbon source is an organic compound capable of forming conductive carbon in a reducing atmosphere; then carrying out natural or vacuum drying on the mixture slurry to obtain mixture powder; and then putting the mixture powder into a sintering furnace for anaerobic sintering to obtain the composite positive electrode particles, in an oxygen-free environment, the carbon source in the mixture powder is dehydrated, and the residual carbon element, the residue after sintering and the plurality of lithium ion conductor particles jointly form a conductive layer which coats the outer surfaces of the LMFP particles, so that the composite positive electrode particles are formed; the distribution of the lithium ion conductor particles on the LMFP particles may be a continuous distribution or an island-like particle.

This invention relates to a method for processing polycrystalline silicon and monocrystalline silicon waste, belonging to the field of waste material recycling and reuse. The method involves vacuum filtering monocrystalline silicon and polycrystalline silicon cutting waste slurry, mixing it with 40-50% TMn electrolytic manganese anode mud after pressure filtration, preheating and dehydrating, and then further heating to obtain heated material. The heated material is then placed in a reducing atmosphere for reduction roasting, and 1.5%-2% reducing agent is added. The mixture is heated to a molten state through electrodes, and the resulting slag is high-manganese slag. The silicon water discharged after heating is then cast into ingots to obtain crude silicon. This invention effectively recovers polycrystalline silicon and monocrystalline silicon waste while also processing electrolytic manganese anode mud, achieving comprehensive utilization of both types of waste. This method effectively solves the long-standing pollution problems caused by cutting waste and electrolytic manganese anode mud, improving the utilization rate of mineral resources.

The invention discloses an electrolyzed water catalyst and a preparation method and application thereof, and the electrolyzed water catalyst comprises iridium oxide (IrOx) and / or ruthenium oxide (RuOx), xlt; 2, the catalyst has a stable lattice structure and a nano-scale particle size; the preparation method comprises the following steps: introducing fuel gas and an oxidizing agent into a flame burner, and igniting for combustion; and controlling the volume flow ratio of the fuel gas to the oxidant, forming a reducing atmosphere in the combustion chamber, introducing an iridium-containing or ruthenium-containing compound solution into the combustion chamber in a spraying manner, carrying out a combustion reaction to generate iridium oxide (IrOx) or ruthenium oxide (RuOx), and collecting a product after the combustion reaction to obtain the electrolyzed water catalyst. Through the mode, the electrolyzed water catalyst disclosed by the invention realizes high activity and excellent stability, and the preparation process is simple in process, good in repeatability, efficient, green and environment-friendly, and high in product quality; the electrolytic water membrane electrode using the catalyst provided by the invention realizes perfect combination of high-efficiency hydrogen production and ultra-long service life.

This invention discloses a solid oxide fuel cell anode material and its preparation method based on zinc trap sites for direct, efficient electrochemical oxidation of ammonia. First, zinc-free Pr is prepared. 0.9 Cr 0.8 Ni 0.2 O 3‑δ The precursor, through zinc source impregnation and stepwise heat treatment, incorporates Zn 2+ By introducing partial substitution of Cr at the B-site of perovskite, zinc-doped perovskite material Pr is obtained. 0.9 Cr 0.8‑x Ni 0.2 Zn x O 3‑δ (0≤x≤0.4). This material, under a reducing atmosphere, Zn... 2+ The anode material, stably dissolved in the crystal lattice, forms strong Lewis acid "zinc trap" sites, which can specifically adsorb and activate ammonia molecules; simultaneously, it induces a high concentration of oxygen vacancies, optimizing the charge transfer process. These synergistic effects significantly enhance the catalytic activity of the anode for ammonia fuel, with a substantial reduction in electrochemical impedance in the mid-to-low temperature range. This phenomenon is presumably related to a shift in the reaction pathway towards the highly efficient "direct electrochemical oxidation of ammonia." The fabricated anode material achieves a power density of 292 mW / cm³ at 800℃ using pure ammonia as fuel. 2 It has good power output performance.