77 results about "Vacuum sintering" patented technology

The present application relates to thin film magnesium battery zirconium magnesium phosphate solid electrolyte target material, preparation method and thin film magnesium battery, belong to magnesium battery technical field. Including: magnesium salt powder is mixed with diaphosphorus pentoxide and zirconium oxide powder to obtain mixed powder; the mixed powder is put into a closed ball mill tank and mixed with zirconium oxide balls, then a dispersing agent is added and mixed and ball milled; then a binder is added to the ball mill tank and ball milled; the synthesized powder after ball milling is sieved through a 500 mesh sieve, the sieved synthesized powder is poured into a vibrating mold, pressed, and a die pressed blank is formed; the blank is put into a cold isostatic pressing machine and pressed and pressure maintained, to obtain a zirconium magnesium phosphate solid electrolyte target material blank after cold isostatic pressing; the zirconium magnesium phosphate solid electrolyte target material blank is put into an atmosphere sintering furnace or a vacuum sintering furnace, after multi-stage heat preservation, the furnace is naturally cooled to room temperature, to obtain a thin film magnesium battery zirconium magnesium phosphate solid electrolyte target material. The composition of the solid electrolyte target material of the present application is uniform, facilitating thin film deposition.

The application relates to the technical field of magnetic materials, in particular to a preparation method of high-performance heavy-rare-earth-free neodymium iron boron magnets; the preparation method comprises the following steps: rapidly quenching a main phase alloy into a flake, obtaining coarse powder after hydrogen breaking; immersing the coarse powder in an ethanol mixed solution containing lanthanum nitrate and cerium nitrate, drying the pretreated coarse powder after ultrasonic-magnetic stirring cooperative treatment; adding an antioxidant and a lubricant into the pretreated coarse powder, preparing fine powder with an average particle size of 2-3.5 microns through airflow milling; performing magnetic field orientation compression molding on the fine powder under nitrogen protection, improving the density through cold isostatic pressing; finally, performing vacuum sintering and step-by-step tempering treatment to obtain the high-performance heavy-rare-earth-free neodymium iron boron magnets; wherein the main phase alloy is composed of the following components with mass percentage: 28-31wt.% Pr25Nd75, 0.88-1.2wt.% B, 0-0.1wt.% Al, 0.05-0.3wt.% Ti, 0.05-0.4wt.% Cu, 0.5-1.4wt.% Co, 0.1-0.4wt.% Ga, and the balance is Fe; the prepared neodymium iron boron magnet has the dual characteristics of high coercivity and high remanence, and effectively guarantees the performance and quality.

This invention relates to the field of metal matrix composite material preparation technology, and discloses a method for preparing a bundled vanadium carbide reinforced steel matrix composite material, comprising: immersing vanadium wire in a pretreatment chemical isolation liquid and drying it to form a precursor solid film on the surface; fabricating a preform from the vanadium wire with the solid film on the surface using a three-dimensional orthogonal weaving process; placing the preform in a vacuum sintering furnace and heating it to complete solid-phase pre-alloying; fixing the preform in a mold and preheating it under a protective atmosphere; melting a high-carbon steel matrix material until it is completely liquefied, injecting it into the mold to immerse the preform, and cooling it to obtain a composite preform block; subjecting the composite preform block to in-situ reaction diffusion heat treatment to obtain the composite material. This invention prevents the thermal loss of vanadium wire during liquid casting and, through in-situ diffusion reaction, allows the generated vanadium carbide to inherit the initial weaving morphology, achieving a three-dimensional bundled uniform distribution of the reinforcing phase within the steel matrix.

This invention belongs to the field of cardiac stent technology, specifically relating to a cobalt-chromium MP35N implantable tube for cardiac stents and its preparation method. The preparation method includes the following steps: raw material preparation and pretreatment, cold isostatic pressing, sintering and densification, multi-directional alternating deformation and tissue regulation, and finishing and shaping treatment to obtain the cobalt-chromium MP35N implantable tube for cardiac stents. This invention constructs a low-impurity, fully dense homogeneous tube blank substrate through cold isostatic pressing, vacuum sintering, hot isostatic pressing, and multi-directional alternating deformation, reducing the risk of subsequent cracking. The multi-directional alternating deformation, through alternating stress of axial tension and radial rotary forging, breaks the directional grain arrangement, and combined with gradient recrystallization heat treatment, ultimately obtains an ultrafine-grained, isotropic structure with both high strength and good toughness.

This invention discloses an antioxidant porous TiAl alloy, the raw materials of which include: a mixed powder, nano-B4C, nano-NiO, and nano-SiO2. The mixed powder comprises TiH2 powder and aluminum powder; the Ti content in the mixed powder is 51-53 wt%; the weight ratio of nano-B4C, nano-NiO, and nano-SiO2 to the mixed powder is 2-3:0.5-1.5:2-3:100. This invention also discloses a method for preparing the above-mentioned antioxidant porous TiAl alloy, comprising the following steps: mixing TiH2 powder and aluminum powder to obtain a mixed powder, then adding nano-B4C, nano-NiO, and nano-SiO2 and mixing, pressing into shape, vacuum sintering, soaking in an alkaline solution, and washing with water to obtain the antioxidant porous TiAl alloy. This invention also discloses the application of the above-mentioned antioxidant porous TiAl alloy in filtering high-temperature flue gas. This invention exhibits excellent antioxidant and filtration performance.

The utility model relates to sealing connecting device technical field especially relates to a kind of vacuum sintering furnace sealing connecting device.Its technical scheme includes furnace body, rotates and installs on the cover of furnace body, further include cooling cavity being located on the cover, sealing body being fixedly installed in cooling cavity, the flow-through groove being equipped with in sealing body and cooling cavity intercommunication, input pipe and output pipe being fixedly installed on the cover and with cooling cavity intercommunication, hydraulic balance component being installed on the cover, the hydraulic balance component includes the detection cylinder being fixedly installed on the cover and with cooling cavity intercommunication, detection plate being slidably installed in the detection cylinder and moving according to the hydraulic pressure size inside cooling cavity.The utility model is directly contacted with the design of sealing body by water cooling device, cooling liquid and sealing body high-efficiency heat exchange, rapidly export high-temperature heat load, strictly control sealing interface temperature in material tolerance threshold, completely avoid rubber carbonization, metal creep and other thermal failure.

A platinum-based composite material with low residual gas content and a preparation method thereof belong to the technical field of platinum-based composite materials, and the preparation method comprises the following steps: S1. Pt, Zr and Y pure metal raw materials are subjected to smelting under vacuum conditions, and then Pt-Zr-Y alloy ingots are obtained by pouring; S2. The Pt-Zr-Y alloy ingots prepared in S1 are made into alloy particles, and the alloy particles are made into alloy powder; S3. The alloy powder prepared in S2 is soaked in high-purity water, then hydrogen peroxide solution is added for activation, and the mixture is sealed and placed for a period of time, then anhydrous ethanol is added and stirred uniformly, and then dried to obtain pre-prepared alloy powder; S4. The pre-prepared alloy powder prepared in S3 is placed in a pure oxygen atmosphere for heating and heat preservation oxidation treatment to obtain oxidized pre-prepared alloy powder; S5. The oxidized pre-prepared alloy powder prepared in S4 is subjected to vacuum sintering treatment to obtain a platinum-based composite material blank; and S6. The platinum-based composite material blank prepared in S5 is subjected to vacuum hot pressing treatment to obtain a platinum-based composite material.

This invention provides a method for preparing high-purity tantalum powder for semiconductors, comprising the following steps: (1) adding potassium fluorotantalate into the inner liner of a double cone furnace, evacuating the vacuum, heating to 280-400°C, and holding for 4-8 hours to activate the potassium fluorotantalate; (2) loading the activated potassium fluorotantalate and diluent obtained in step (1) into a reduction vessel, introducing argon gas to replace the air, heating to 800-900°C to begin sodium injection, and after sodium injection, holding for aging for 0.5-2 hours, and allowing to cool to room temperature to obtain the reactant; (3) washing the reactant obtained in step (2) with water and acid, then washing with pure water until neutral, and drying to obtain a semi-finished product; (4) placing the semi-finished product obtained in step (3) in a vacuum sintering furnace for high-temperature sintering to obtain a tantalum sintered block, crushing the tantalum sintered block with a crusher, and then sieving it with a vibrating sieve to obtain high-purity tantalum powder for semiconductors. The high-purity tantalum powder obtained by this invention can meet the technical requirements of semiconductor sputtering targets.

This utility model relates to the field of vacuum sintering furnace technology, and discloses a multi-module vacuum sintering furnace, including a first slide gate valve, a second slide gate valve, a third slide gate valve, a fourth slide gate valve, multiple module components, multiple fixture frames, multiple sealing plates, a preheating zone, a welding zone, and a first cooling zone. The inlet end of the preheating zone is equipped with a first slide gate valve via a sealing plate, and the outlet end of the preheating zone is equipped with a second slide gate valve via a sealing plate. The inlet end of the welding zone is equipped with a second slide gate valve via a sealing plate, and the outlet end of the welding zone is equipped with a third slide gate valve via a sealing plate. The inlet end of the first cooling zone is equipped with a third slide gate valve via a sealing plate, and the outlet end of the first cooling zone is equipped with a fourth slide gate valve via a sealing plate. Fixture frames are arranged inside the preheating zone, welding zone, and first cooling zone, and multiple module components are arranged on the fixture frames. The arrangement of multiple module components on the fixture frames limits the welding range and improves welding quality and efficiency.

This invention discloses a liquid-cooled microchannel powder metallurgy fabrication method, belonging to the field of radiator manufacturing technology. The invention employs a pre-stamping process to prepare copper heat dissipation fins, combined with customized spherical high-purity copper powder and composite polymer bonding particles. A uniform mixture is prepared through segmented high and low temperature and high and low speed stirring. This is then combined with metal powder injection molding, oxalic acid degreasing, nitrogen atmosphere constant temperature anti-oxidation pretreatment, and high-vacuum sintering processes, along with controllable molding and sintering parameters, to fabricate a copper liquid-cooled microchannel radiator. This invention effectively solves the problems of difficult molding of thin-walled pure copper microchannel structures, poor dimensional consistency, and susceptibility to defects and springback. It significantly improves the extrusion of copper materials in microchannel structures, the smoothness of the inner wall, and the overall density, strengthens the bond strength between the fins and the substrate, and eliminates leakage, corrosion, and heat dissipation attenuation under long-term liquid cooling cycles. The product yield is high, and the stability is excellent.

The application discloses a preparation method of superfine-grain high-temperature-resistant induced superlattice phase transition powder high-speed steel, and belongs to the technical field of powder metallurgy, and the method comprises the following steps: 1, raw material selection; 2, after Cr2C powder, Ti x Mo 1‑x C powder and C4H 13 NO powder are mixed, spray drying granulation is carried out; 3, the granulated powder is mixed with high-speed steel powder; 4, multi-stage temperature rising and heat preservation are carried out, and finally, the target powder high-speed steel is obtained. x Mo 1‑x The Cr2C powder and Ti C powder realize multiple strengthening mechanisms, and in combination with the simple process of powder vacuum sintering, the high-temperature performance of the powder high-speed steel is obviously improved, and large-scale industrialized assembly line production with low cost is realized.

This invention discloses a polyamide 6 highly conductive fabric for textile-based electronic products and its preparation method, comprising the following steps: (1) mixing a certain amount of precursor with a complexing agent to obtain a mixture; (2) adding a certain amount of solvent to the mixture to obtain an ink mixture; (3) filtering to obtain conductive ink, and storing it in the dark; (4) preparing a modifier; (5) using a rolling mill to uniformly roll the modifier onto the polyamide 6 fabric; (6) drying, sealing and storing to obtain a modified polyamide 6 fabric; (7) uniformly brushing conductive ink onto the surface of the modified polyamide 6 fabric 2-4 times; (8) vacuum sintering treatment. This invention eliminates the reducing agent and other additives in the ink, avoiding the influence of many chemicals in the ink on the conductivity of the nano-silver layer. At the same time, by modifying the surface of the polyamide 6 fiber, the spreading and penetration of the ink on the fiber surface is controlled, thus realizing the preparation of a highly conductive silver layer.

The present application relates to the field of superhard material, and particularly relates to a kind of corrosion-resistant diamond compact.The diamond compact includes corrosion-resistant base body and polycrystalline diamond layer.The polycrystalline diamond layer includes cobalt, nickel, tantalum;The method for preparing corrosion-resistant diamond compact includes the following steps: step 1: corrosion-resistant base body preparation, tungsten carbide powder, cobalt powder, nickel powder, chromium powder and tantalum powder are mixed, and vacuum sintering is carried out after compression molding, to obtain corrosion-resistant base body;Step 2: diamond micro powder is mixed with catalyst, then loaded into high-temperature metal cup, then loaded into the above-mentioned corrosion-resistant base body and packaged, and then loaded into high-temperature high-pressure container;Step 3: high-temperature high-pressure synthesis sintering, the high-temperature high-pressure container is placed into six-surface pressing machine, and pressure and heating are carried out, to obtain diamond compact;The corrosion-resistant diamond compact in the present application can be applied to drilling operation in the presence of acidic liquid or corrosive gas and greatly improve the corrosion resistance of diamond compact.

This invention discloses an MBNS-GC-Ni2Si reinforced biphase SiC composite ceramic and its preparation method. The method includes adding hexagonal boron nitride to phenolic resin and exfoliating it in a three-roll mill to obtain a first mixture containing multilayer boron nitride nanosheets; dissolving the first mixture in furfural solution, then sequentially adding high-purity silicon powder, nickel nitrate hexahydrate, boron carbide, and α-SiC ceramic powder, and stirring to obtain a second mixture; removing moisture and furfural from the second mixture and then vacuum sintering it at 1900-2100℃. The MBNS-GC-Ni2Si reinforced biphase SiC composite ceramic obtained by this invention achieves high mechanical strength and excellent electromagnetic wave absorption performance. It meets the requirements of high-performance structure-function integrated SiC-based composite ceramics, such as aerospace, stealth fighters, and functionalized armor, and has broad market application prospects.

The present application belongs to the technical field of hard alloy material, and particularly relates to a hard alloy for hard rock tooth and a preparation method thereof. The method comprises the following steps: mixing coarse tungsten carbide powder, submicron tungsten carbide powder, cobalt powder, nickel powder, chromium carbide powder, vanadium carbide powder, tantalum carbide powder, niobium carbide powder, dimolybdenum carbide powder, graphite powder, tantalum-niobium-zirconium composite carbide solid solution pinning body and yttrium-doped cerium oxide toughening control body, ball milling, drying, crushing, sieving, granulating, die pressing, cold isostatic pressing, degreasing, vacuum sintering, hot isostatic pressing treatment, grinding, cleaning and drying. The present application can inhibit grain growth by multiple carbides, and can improve the grain boundary and binder phase distribution by using rare earth oxides, so that the obtained hard alloy has good wear resistance, impact resistance and anti-chipping performance, and is suitable for hard rock tooth.

The utility model discloses a transfer device and system belongs to vacuum sintering technical field, including frame, vertical displacement adjusting device and horizontal displacement adjusting device, and vertical displacement adjusting device is used for driving horizontal displacement adjusting device to move up and down along vertical direction, horizontal displacement adjusting device includes horizontal platform and sets up the limiting component on horizontal platform, and horizontal platform includes first support frame, and one end of first support frame is fixed with fixed support plate, and the other end slidingly connected with mobile support plate, and mobile support plate is away from or approaches fixed support plate along the horizontal direction, and fixed support plate can be aligned with workpiece placement station on material car, and mobile support plate can extend to the inside of sintering furnace, and with workpiece placement station in sintering furnace alignment, to transfer the piece to be transferred between material car and sintering furnace, control device electricity is connected vertical displacement adjusting device, the utility model discloses can smoothly, safely transfer the piece to be transferred.

The utility model relates to connecting door structure technical field, especially a kind of connecting door structure for the connection between conveying material box and vacuum sintering furnace.Its technical scheme includes connecting body, and further include the valve component of fixed installation in the both ends of connecting body, the valve component includes plugging assembly and sealing assembly, the plugging assembly includes the support block of fixed installation on connecting body, multiple plugging plates are slidably installed in the support block, sealing element is equipped between the two adjacent plugging plates, the plugging assembly further includes the drive assembly of driving multiple plugging plates synchronous contraction or expansion.The utility model is by splitting single valve core into multiple plugging plates, when canceling plugging, just need to move multiple plugging plates to expand by drive assembly, plugging can be cancelled, so that the stroke of plugging plate is less than the stroke of single valve core, and then the path of plugging plate movement can be reduced, thereby the volume of machine body is reduced, effectively reduce the thickness of connecting door, adapt compact production line layout.

The present application belongs to the technical field of metal additive manufacturing, and particularly relates to an aluminum-tungsten alloy for additive manufacturing and a preparation method thereof. The preparation method of the aluminum-tungsten alloy for additive manufacturing comprises the following steps: a powder preparation step, a pressing step, a vacuum sintering step, a machining step, an extrusion step, a wire preparation step, a powder preparation step and a sieving step. Through the technical scheme of the present application, the powder material ratio is improved, and the cooling speed is increased by lowering the gas cooling temperature when the wire is powdered by the wire electric explosion method, so as to achieve the purpose of rapid cooling and powdering. The aluminum-tungsten alloy spherical powder prepared by the present application does not contain or contains a small amount of aluminum-tungsten intermetallic compound, and can be used for additive manufacturing.

This invention discloses a heating unit, a heating assembly, a multi-zone heating device, and a sintering furnace, belonging to the field of vacuum sintering furnace technology. The heating unit includes a first electrode, a second electrode, and an arc-shaped heating element. The arc-shaped heating element includes multiple arc-shaped heating plates arranged side by side. One end of each arc-shaped heating plate is connected in parallel to the first electrode, and the other end is connected in parallel to the second electrode. The heating assembly includes two heating units symmetrically arranged along a preset installation axis. The multi-zone heating device includes a heating system, which includes multiple heating assemblies spaced apart. The sintering furnace includes a furnace body and the multi-zone heating device. The arc-shaped heating plates have a sheet-like structure. A single arc-shaped heating plate has a larger heating area than a thin strip-shaped heating element. When multiple arc-shaped heating plates are arranged side by side, they can cover more space inside the furnace. The circuit structure is simple, and the design and calculation of the resistance and power of the heating unit are more convenient.

The application discloses a kind of refractory brick materials of multiple oxide ceramic coating containing reinforcing phase and preparation method thereof, belong to the field of ceramic material preparation.The method is that the powder raw material in the inside such as coated modified silicon carbide, Al2O3, CMSP mixed oxide and dispersing agent is mixed with solvent to obtain slurry;The slurry is coated on the surface of refractory brick matrix after sand blasting roughening, and vacuum sintering and annealing treatment are carried out to obtain it.By the method of the application, the composite material has the advantages of high density, high hardness, tight combination of matrix and coating and good high-temperature slag erosion resistance, etc., and can meet the long-term protection needs of refractory bricks in severe high-temperature environment.

This application discloses a high corrosion-resistant, non-magnetic austenitic stainless steel, its preparation method, and a wearable device, relating to the field of metal powder metallurgy technology. The stainless steel, by mass percentage, comprises: Cr: 22%–27%, Mn: 5%–9%, ​​Ni: 5%–9%, ​​Mo: 3%–7%, N: ≥0.6%, with the balance being Fe and impurities; its matrix microstructure is a single-phase austenite with supersaturated dissolved nitrogen. The preparation method includes mixing and granulation, injection molding, degreasing, vacuum sintering for densification, and solid-phase nitriding in a nitrogen-containing atmosphere with a nitrogen partial pressure of 4080 kPa during the cooling stage after sintering (1250–1100 °C). This application solves the problems of low nitrogen solid solubility and easy precipitation of brittle phases leading to decreased corrosion resistance and excessive magnetic properties caused by atmospheric pressure smelting by using a high-chromium composition system combined with a high-pressure nitriding process in the cooling stage. It achieves excellent properties that combine high strength, high hardness, high corrosion resistance, and complete non-magnetism, while reducing the nickel content and minimizing the risk of allergies.

The application discloses a kind of high-performance magnesium-lithium alloy materials, the high-performance magnesium-lithium alloy material is obtained by being compacted by magnesium-lithium alloy powder into mould, then sintering densification is carried out, in addition, the application also provides a kind of preparation method of high-performance magnesium-lithium alloy material, comprising the following steps: one, Mg-8Li-9Al-1Zn alloy powder is weighed and loaded into mould;Two, the powder in the powder loaded mould is compacted;Three, the mould with compacted powder is sintered densification in vacuum, and high-performance magnesium-lithium alloy material is obtained in mould.The high-performance magnesium-lithium alloy material of the application uses Mg-8Li-9Al-1Zn alloy powder as raw material, is compacted by being loaded into mould, then sintering densification is carried out, process flow is short, cost is low, operation is simple, flexible, the obtained high-performance magnesium-lithium alloy material component is uniform, organization is small, and the organization, structure of material can be designed, easily controlled, and the compressive strength is greater than 500MPa.

This invention discloses an aluminum powder sintered electrolytic capacitor anode without an aluminum foil carrier, its preparation method, and its application. Belonging to the field of electrochemical device fabrication technology, the method involves grinding and depolymerizing aluminum powder, filling it into a mold, inserting aluminum wire into the aluminum powder, and pressing it into shape to obtain a green body. After vacuum sintering, anodizing is performed in an ammonium salt or borate solution to obtain the aluminum powder sintered electrolytic capacitor anode without an aluminum foil carrier. By directly pressing pure aluminum powder and aluminum wire leads into shape and then vacuum sintering, a self-supporting porous anode block without an aluminum foil carrier is obtained. This structurally eliminates the risk of interface failure between the foil carrier and the coating layer, avoids the introduction of organic binders, simplifies the process flow, and improves the designability of the pore structure and the mechanical reliability of the anode. The capacitance density after formation can reach 4.0 × 10⁻⁶. 4 μF·V / g, volumetric capacitance density not less than 7.1×10 4 μF·V / cm 3 With a leakage current not exceeding 1.0 nA / (μF·V), it achieves a synergistic improvement in high energy storage capacity and long-term electrical reliability, providing a solution for the miniaturization and high capacitance of aluminum electrolytic capacitors.

This invention discloses a composite fluorescent ceramic for reflective laser illumination and its preparation method. The method includes: S1: preparing YAG powder, YAG:Ce powder, and YAG-Al2O3 powder respectively; S2: pressing the YAG / YAG:Ce / YAG-Al2O3 composite ceramic blank by dry pressing, followed by vacuum sintering and annealing; S3: forming a conical structure array on the YAG portion of the composite ceramic surface using laser engraving, resulting in a final composite fluorescent ceramic thickness of 4–5 mm. The composite fluorescent ceramic for reflective laser illumination prepared by this invention has advantages as a luminescent material, including high thermal conductivity, high luminous efficiency, and low incident light surface temperature.

The application discloses a preparation method and application of an inert metal tungsten anode for low-temperature electrolytic aluminum of ionic liquid, and relates to the technical field of electrolysis. The preparation method of the porous tungsten inert anode provided by the application comprises raw material proportioning, raw material mixing, vacuum sintering and electrode purification. The method combines a discharge plasma sintering process with an electrochemical dissolution process to prepare the porous tungsten anode with a pore diameter of 1-10 microns. The anode has excellent electrochemical stability and corrosion resistance, can effectively promote the desorption of anode chlorine gas bubbles in the electrolysis process, and can effectively reduce the voltage of the low-temperature electrolytic aluminum system of ionic liquid.

The application provides a high-boron alloy-based ceramic wear-resistant material and a preparation process thereof, and relates to the technical field of metal-based ceramic materials.The material is composed of a hard phase base of molybdenum, nickel and boron, and is additionally compounded with chromium, copper, zirconium and yttrium elements; the chromium and copper have a synergistic effect to inhibit interface electrochemical corrosion caused by low-temperature condensation environment; the zirconium and yttrium have a synergistic effect to improve the toughness and crack propagation resistance of the material at low temperatures.The preparation process comprises the steps of batching, high-energy ball milling, drying and sieving, pressing and vacuum sintering.The material is particularly suitable for lining plates and roller drums and the like components of a cold-chain logistics conveying system, can simultaneously solve the synergistic failure problem of corrosion peeling and brittle wear under extreme working conditions of a low temperature of-10~5 DEG C and a high humidity of more than 90%, and can maintain high hardness and high wear resistance, and the comprehensive service performance is significantly better than that of traditional materials.

This utility model relates to the field of vacuum sintering technology, specifically a gas preheating system utilizing waste heat and a vacuum sintering furnace. The system includes a waste heat recovery mechanism, a connecting pipe, and a storage mechanism. A gas outlet pipe on one side of the top of the waste heat recovery mechanism is connected to one end of the connecting pipe, and the other end of the connecting pipe is connected to the storage inlet pipe of the storage mechanism. The waste heat recovery mechanism contains multiple layers of heat recovery pipes, with the gas inlet pipe at one end and the gas outlet pipe at the other end. The U-shaped arrangement of the multiple heat recovery pipes increases the contact area of ​​the heated gas, thereby improving waste heat recovery efficiency.

A high-purity quartz sand high-temperature chlorination purification pipe structure includes a main pipe, with both ends welded to one end of a first reducing neck and one end of a second reducing neck, respectively. The other end of the first reducing neck is welded to one end of a straight pipe, and the other end of the second reducing neck is welded to a capped pipe. The other end of the straight pipe is detachably connected to a movable insulating plug. Using this structure, the pipe diameter and length can be adjusted flexibly to accommodate varying material loading. It features high strength, high temperature resistance, and corrosion resistance, making it suitable for large-scale production. It allows for both continuous and intermittent production, vacuum sintering and vacuum dehydroxylation, and atmosphere sintering and atmosphere reaction, offering high flexibility. Material is evenly dispersed, and the gas flow and pressure can be flexibly controlled, ensuring sufficient contact with the reaction gas, reducing material costs, preventing gas leakage, and ensuring high safety.