702 results about "Graphite electrode" patented technology

The invention provides a method for making foam slag in LF (ladle furnace) refining by using a waste graphite electrode, which specifically comprises the following steps: grinding the waste graphite electrode to obtain graphite electrode powder, and adding limestone as a foaming agent in the LF refining. 0-1.25 kg / t of steel limestone is added firstly, and 0.018-0.19 kg / t of steel graphite electrode powder is added every 2 min. Compared with the prior art, by utilizing the characteristics of high carbon content, high conductivity and low sulfur of the graphite electrode, the invention aims to realize submerged arc heating, reduce power consumption and shorten refining time so as to meet the requirement of continuously increasing LF smelting indexes under the high-quality development trend of steelmaking.

The invention discloses a graphite electrode cooling device of a graphitization furnace, the graphitization furnace and a cooling method, and relates to the technical field of graphite electrode cooling, the graphite electrode cooling device of the graphitization furnace comprises a cooling mechanism, the cooling mechanism comprises an adhesion layer and a plate type heat pipe, an adhesion layer is arranged on the surface of the graphite electrode exposed outside the graphitization furnace, the plate type heat pipe is arranged on one side, far away from the surface of the graphite electrode, of the adhesion layer, the plate type heat pipe comprises a sealing shell, a medium cavity is formed in the sealing shell, a capillary core layer is arranged on the inner wall of the medium cavity, and a cooling medium is stored in the medium cavity; according to the graphite electrode cooling device of the graphitization furnace, the plate type heat pipe is attached to the surface of the exposed graphite electrode, circulating water cooling is not needed, phase change heat transfer of a cooling medium is utilized, the heat dissipation efficiency is improved, phase change heat transfer is not conducted under the low-temperature condition, and invalid heat exchange is avoided.

The invention relates to the field of needle coke production, and discloses needle coke as well as a preparation method and application thereof. The strength of the needle coke is 25-34%; the thermal expansion coefficient of the needle coke is 0.8 * 10 <-6 > / DEG C to 1.2 * 10 <-6 > / DEG C; in the microstructure of the needle coke, the content of the mosaic structure is 0.1%-10%; the content of the small sheet structures is 10%-30%; the content of the large sheet structure is 15-40%; the content of the fine fiber structure is 10%-45%; and the content of the crude fiber structure is 10-45%. The needle coke provided by the invention has better optical structure, thermal expansion coefficient and strength, and is suitable for producing large-diameter and ultrahigh-power graphite electrodes and graphite electrode joints.

The invention relates to the technical field of graphite electrode production, in particular to a roasting device for graphite electrode production and a roasting method.The roasting device comprises a roasting box, a sieve plate and a plurality of rotating rollers, a plurality of connecting plates corresponding to the rotating rollers are horizontally arranged in the roasting box in a sliding mode, the rotating rollers are embedded and rotationally connected to the connecting plates, and a through opening is formed in the roasting box; the end part of the rotating roller penetrates through the through hole and extends to the outer side of the roasting box, and a pair of arc-shaped scraping plates is arranged on the outer side wall of the rotating roller; and the scraping assembly drives a plurality of pairs of arc-shaped scraping plates to synchronously scrape residues on the outer side wall of the rotating roller. Compared with roasting in the prior art, by arranging the sliding assembly, the rotating assembly and other parts, the distance between the rotating rollers can be adjusted, and the graphite electrode roasting device is suitable for graphite electrodes of different thicknesses. The rotating roller can rotate to drive the electrode to roll, so that uniform roasting is ensured. During roasting or after roasting is finished, the scraping assembly can clean residues on the rotating roller.

The invention discloses an anti-erosion Al2O3-SiC-C slag runner castable containing pyrophyllite and a preparation method of the anti-erosion Al2O3-SiC-C slag runner castable, and belongs to the technical field of refractory materials. The Al2O3-SiC-C slag trough castable is mainly prepared from the following raw materials in percentage by mass: 30 to 45 percent of high-alumina clinker, 20 to 35 percent of pyrophyllite, 8 to 15 percent of silicon carbide, 5 to 10 percent of kyanite, 5 to 10 percent of graphite electrode powder, 3 to 6 percent of active Al2O3 micro powder, 2 to 4 percent of silicon micro powder, 1.5 to 2.5 percent of antioxidant, 3 to 5 percent of pure calcium aluminate cement and 1.5 to 2.5 percent of asphalt. In addition, explosion-proof fibers accounting for 0.03-0.15% of the total weight of all the raw materials and a water reducing agent accounting for 0.05-0.15% of the total weight of all the raw materials are added. The anti-erosion Al2O3-SiC-C slag runner castable is prepared by mixing the weighed raw materials uniformly and then obtaining the anti-erosion Al2O3-SiC-C slag runner castable. The Al2O3-SiC-C slag runner castable prepared by the method can completely meet the requirements of the use performance of the Al2O3-SiC-C slag runner castable, and the Al2O3-SiC-C slag runner castable can be well applied to a blast furnace casting house; meanwhile, the cost is reduced, and remarkable social benefits and economic benefits are achieved.

The invention provides an optimization method and system for reducing electricity consumption of a graphite electrode and improving the adhesion of medium-temperature pitch, and relates to the technical field of industrial production. The optimization system for reducing the electricity consumption of the graphite electrode and improving the adhesion of the medium-temperature pitch comprises an electric energy management module which comprises a monitoring unit, a control unit and a feedback unit, and the monitoring unit is used for monitoring the electricity consumption condition of production equipment in real time; the control unit can automatically adjust operation parameters of the equipment according to monitoring data so as to reduce electricity consumption; and the feedback unit feeds back the adjusted electricity consumption data to the data processing module. Through real-time monitoring and intelligent control of the electric energy management module, the electricity consumption in the graphite electrode production process can be effectively reduced, the system can adjust equipment operation parameters according to real-time data, energy waste is avoided, the energy utilization efficiency is improved, and through proportion adjustment and process parameter optimization of the adhesion optimization module, the production efficiency is improved. The bonding degree of the medium-temperature asphalt can be obviously improved, and process parameters can be monitored and adjusted in real time.

The invention discloses a secondary roasting device and roasting method for graphite electrode production, and belongs to the technical field of graphite electrode roasting devices.The secondary roasting device for graphite electrode production comprises a furnace body and two sliding rails arranged on one side of the furnace body, and a bottom plate is assembled on the sliding rails in a sliding mode; the bearing plate can be pulled out of the furnace body through cooperation of the hook plate and the connecting groove, when a new bearing plate falls onto the inner barrier strip and the outer barrier strip, the reversing assembly can release the locking relation with the inner barrier strip, then the pulling force direction of the auxiliary steel cable on the guide block is changed, the auxiliary steel cable can pull the bottom plate to gradually get close to the furnace body, and therefore the furnace body is protected. And the bearing plate is pushed into the furnace body through the ejector rod, manual intervention is little in the whole process, so that the process of entering and exiting the furnace is safer, the whole operation is completed only through cooperation of the main steel cable and the auxiliary steel cable, and the device is simple in overall structure and convenient to maintain.

The utility model provides a crushing device for graphite electrode production, which comprises a crushing box with a conical lower end, and a discharge port, support legs, a crushing module, a feed hopper, a fixed frame, a plurality of springs, a mounting chute, a screening tank, a blanking guide cylinder, a push-pull module, a vibration motor and an access hole arranged at the bottom of the crushing box, a side plate matched with the inlet and outlet hole is further detachably arranged at the right end of the crushing box. According to the crushing device for graphite electrode production, the basic requirement for crushing treatment of raw materials for graphite electrode production can be met, the crushed raw materials can be screened through the screening structure, a user can conveniently take out the screening structure from the crushing device, and the crushing device is convenient to use. And therefore, large-particle raw materials retained in the screening structure and clamped in the screening holes of the screening structure can be conveniently cleaned, and the subsequent screening treatment efficiency and effect of the crushed raw materials are prevented from being influenced.

The invention relates to the technical field of laser processing, in particular to a graphite ultra-micropore femtosecond laser beam splitting array processing device and a heat influence suppression method, the graphite ultra-micropore femtosecond laser beam splitting array processing device comprises a laser micropore processing equipment main body provided with a laser emission head, and the laser micropore processing equipment main body is provided with a heat suppression workbench mechanism and a workpiece air cooling device; the thermal inhibition workbench mechanism comprises a base, a cover plate, a liquid cooling assembly and an air cooling assembly. The air cooling assembly comprises an end plate and a plurality of exhaust fans. By means of the heat suppression workbench mechanism with the liquid cooling assembly and the air cooling assembly, a composite heat conduction path of'contact conduction-liquid cooling circulation-airflow heat dissipation 'is formed, heat of the workpiece is rapidly conducted out, and the heat influence of ultra-micropore machining of the graphite workpiece is suppressed; the annular pipe blows air flow to a machining area through the air exhaust groove, heat of a laser action point is taken away instantly, and the heat influence on the graphite electrode micro hole in the machining process is further reduced.

The invention provides a method for degrading a perfluoroalkyl compound by activating peroxymonosulfate based on a graphite electrode. Comprising the following steps: step 1, pretreatment of a graphite rod electrode: soaking the graphite rod electrode in a sulfuric acid solution to remove surface impurities; step 2, preparing an electrolyte: preparing the electrolyte containing a perfluoroalkyl compound to be degraded, a background supporting electrolyte and peroxymonosulfate (PMS), and fully stirring to ensure uniform distribution; and step 3, inserting the pretreated graphite rod electrode into electrolyte in an electrolytic bath, adjusting current and voltage, and carrying out electrolysis under the condition of solution stirring. According to the method, the feasibility of activating the PMS to degrade the perfluoroalkyl compound by the low-oxygen-evolution-potential electrode is proved for the first time, and the cognitive limitation of the traditional technology is broken through; the prior art generally depends on a high oxygen evolution potential electrode (such as a BDD electrode, and the oxygen evolution potential is larger than 2.0 V / SHE) to activate PMS so as to degrade perfluoroalkyl compounds.

The iron casting waste cast iron scrap recycling and smelting device comprises a supporting bottom plate, an electric arc furnace and a supporting frame are connected to the middle of the top of the supporting bottom plate, a plurality of graphite electrodes are connected to the bottom of the supporting frame, and a second electric cylinder is connected to the position, between the electric arc furnace and the supporting frame, of the top of the supporting bottom plate; a driving motor is connected to the top telescopic power end of the second electric cylinder, a rotating disc and a fixed supporting rod are connected to the top power end of the driving motor, a cover plate matched with the electric arc furnace is connected to the end of the fixed supporting rod, and a protective inner sleeve is connected to the top of the cover plate and located on the outer side of the inserting hole; the bottom of the supporting plate is connected with a protective inner sleeve connected with the protective inner sleeve in a sleeved mode. Compared with the prior art, the device has the advantages that the electric arc furnace can be covered in a sealed mode through the cover plate capable of rotating and ascending and descending, spraying around the electric arc furnace can be prevented, meanwhile, the inner sleeve and the outer sleeve are arranged at the positions of the inserting holes, spraying cremation can be prevented, and therefore safety is greatly improved.

The invention relates to the technical field of graphite electrode production and material screening, in particular to a novel material screening mechanism for graphite electrode roasting production, which comprises a bottom support frame, the upper part of the bottom support frame is slidably connected with a first support frame and a second support frame respectively, and a material receiving hopper is fixedly mounted on the second support frame; a triangular supporting frame is arranged on the first supporting frame, a vibrating screen power assembly is arranged between the first supporting frame and the second supporting frame, frequency modulation devices capable of adjusting the vibrating screen frequency of the vibrating screen power assembly are arranged on the two sides of the bottom supporting frame, and a longitudinal vibrator located between the first supporting frame and the second supporting frame is arranged on the bottom supporting frame. One end of the triangular supporting frame is rotationally connected with a screen, and the other end of the triangular supporting frame is provided with an elastic vibrator capable of elastic vibrating screen materials on the screen. According to the novel material screening mechanism for graphite electrode roasting production, automatic multiple-time multi-form vibration screening can be effectively conducted on graphite electrode raw material particles, the raw material difference between tanks is reduced, and the stability of the subsequent process in production is improved.

The invention relates to dust detection, in particular to a dust isolation sensor with a self-cleaning function, which comprises a box body, the box body is provided with an air duct, the air duct is provided with an air inlet and an air outlet, the dust isolation sensor also comprises a light-emitting component and a light-sensing component, a graphite electrode is inserted into the air duct, and the graphite electrode is connected to one electrode of a direct-current power supply; an air suction port of the air suction fan faces an air outlet of the air duct; the vibration motor is mounted on the outer side wall of the air duct, and the vibration motor vibrates to drive the air duct to vibrate; the device further comprises an air blowing nozzle, the air blowing nozzle comprises an air inlet and an air blowing opening, the air blowing opening faces the inner cavity of the air channel, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air. The box body is connected with a ceramic bracket which supports a graphite electrode; a rubber pad is padded at the connecting part of the ceramic bracket and the graphite electrode; dust in the air duct is continuously removed, and the long-term use stability of the dust sensor is kept.

The embodiment of the invention discloses an electrode evaluation method. The method comprises the following steps: acquiring the initial active lithium amount of a to-be-detected symmetric battery; the working electrode and the counter electrode of the symmetrical battery are made of graphite; carrying out charging and discharging process control on the symmetrical battery for multiple times to obtain the residual active lithium amount; based on the initial active lithium amount and the residual active lithium amount, evaluating a graphite electrode of the symmetric battery; in each charging and discharging process, the symmetrical battery is charged and discharged at a relatively high first charging rate and a relatively high first discharging rate, so that lithium removal of the counter electrode and the working electrode is completed, and the symmetrical battery is charged to a second voltage, so that electrolysis of a solid electrolyte interface film of the counter electrode is completed; and discharging the symmetrical battery to a fourth voltage to enable the solid electrolyte interface film of the working electrode to complete electrolysis. According to the invention, the time of each charging and discharging process and the consumption speed of lithium ions are accelerated, so that the evaluation speed of the graphite electrode is accelerated.

The invention provides a medium-temperature pitch proportion optimization method and system for a graphite electrode, and relates to the field of material engineering. The medium-temperature pitch proportion optimization system for the graphite electrode comprises a proportion analysis module which establishes a proportion model of graphite electrode production through mathematical modeling and data analysis according to the particle size distribution of graphite particles and the viscosity and softening point characteristics of pitch, can analyze various parameters in the production process of the graphite electrode in real time, and can optimize the proportion of the pitch in the graphite electrode production process; the optimal asphalt ratio range is calculated; and the data acquisition module is used for acquiring data of key parameters in the production process, including the size, temperature and humidity of graphite particles and the viscosity of asphalt, and is connected with the central control system through a sensor to transmit the data in real time for further analysis. Through the accurate asphalt proportion and optimization process, the strength, thermal stability, oxidation resistance and other physical properties of the graphite electrode can be effectively improved, and the rejection rate is reduced.

The invention belongs to the technical field of cooperative control, and belongs to an ultrahigh-power graphite electrode roasting multi-parameter cooperative control method and system, and the method comprises the steps: collecting full-dimensional operation parameters of a roasting system, carrying out the partition division of a roasting furnace, and collecting the coupling state data of each partition in real time. And identifying different roasting abnormal scenes based on the coupling state data, and constructing process collaborative risk data under different roasting abnormal scenes in combination with the stage of the current roasting process and the aging state of the furnace body. And marking a to-be-adjusted parameter set in the cooperative control strategy according to the process cooperative risk data, and performing adjustment to obtain an optimized cooperative control strategy. According to the balance degree index, performing comprehensive evaluation on each control node in the optimization cooperative control strategy, defining the control nodes which do not pass the evaluation as risk nodes, and generating a risk adjustment strategy pointing to the risk nodes; according to the method, multi-target collaborative optimization can be realized, the production cost is reduced, and the stability and controllability of the roasting process are improved.

The invention discloses a precise graphite electrode high-speed milling method and an aero-engine, a graphite electrode workpiece is applied to diffuser flow channel machining, the shape of the workpiece is matched with that of a diffuser flow channel, the length of the workpiece is larger than 140 mm, and the outer diameter of the workpiece tends to decrease from bottom to top; the machining method comprises the steps that a workpiece is divided into an upper half section and a lower half section from top to bottom according to the structural characteristics of the workpiece; the upper half section of the workpiece is machined, and winding milling is conducted on the upper half section of the workpiece; and the lower half section of the workpiece is machined, and the lower half section of the workpiece is machined in the first direction and the second direction which are opposite. The upper half section is firstly machined, the lower half section is clamped through a clamp to keep the upper half section to have enough rigidity, a cutter is perpendicular to a working platform to conduct winding milling machining on the workpiece, comprehensive errors generated after a rotary table is added are avoided, the highest precision of a machine tool is brought into play, and the requirement for the profile tolerance is met. And after the upper half section is machined, the front face and the back face of the workpiece profile are machined, three-axis linkage is adopted in the machining process, and high precision of a machine tool is guaranteed.

The invention provides a graphite full-module tripping power supply surge protector, and relates to the technical field of surge protectors. The graphite full-module tripping power supply surge protector comprises a shell, a graphite gap assembly and a tripping mechanism, the graphite gap assembly is arranged in the shell, and the graphite gap assembly comprises a graphite electrode A and a graphite electrode B; the tripping mechanism comprises an elastic sheet assembly, a tripping seat, a microswitch and a remote signaling terminal; the elastic sheet assembly is arranged in the shell, the elastic sheet assembly comprises a tripping elastic sheet, the end part of the tripping elastic sheet is in tin soldering connection with a tripping seat, and the tripping seat and the graphite electrode A are integrally arranged; the microswitch is in buckling connection with the shell, and the remote signaling terminal is electrically connected with the microswitch; and when the graphite gap assembly is heated by the fault current, the tripping elastic sheet is separated from the tripping seat and triggers the microswitch. The graphite full-module tripping power supply surge protector can be tripped in time in case of fault current, combustion accidents caused by overheating are avoided, and normal operation of circuit equipment is ensured.

The invention discloses a graphite electrode roasting device, which belongs to the technical field of graphite electrode roasting and comprises a furnace body, a bottom plate is arranged on one side of the furnace body, vertical plates are fixedly mounted on two sides of the top of the bottom plate, a plurality of groups of driving shafts and driven shafts are mounted between the two vertical plates, and connecting shafts are fixedly arranged at the ends of the driving shafts and the ends of the driven shafts. The connecting shaft penetrates through the vertical plate and is rotationally matched with the vertical plate, the driving shaft and the driven shaft are rotationally sleeved with lantern rings, and jacking units are arranged on the outer walls of the lantern rings; according to the device, the graphite electrode can be driven to rotate through the driving shaft and the driven shaft, so that the graphite electrode can be uniformly heated, and the jacking unit can be driven to deflect upwards to a horizontal state in the anticlockwise rotation process of the driving shaft through the jacking unit, so that feeding and discharging of the graphite electrode are facilitated.

The invention discloses a butt joint mechanism of a graphite electrode contact, and relates to the technical field of graphite electrodes, the butt joint mechanism comprises a bearing base and a bidirectional threaded rod rotatably mounted at the center position in the bearing base; a positioning mechanism is arranged on the left side of the top surface of the bearing base, and the positioning mechanism comprises a positioning bracket; dust removal mechanisms are arranged on the front side and the rear side of the middle of the top face of the bearing base correspondingly, each dust removal mechanism comprises a dust removal support, and dust removal rotating discs are rotationally arranged at the top ends of the symmetrically-arranged dust removal supports through bearings correspondingly; a butt joint mechanism is arranged on the right side of the top face of the bearing base. According to the butt joint mechanism of the graphite electrode contact, a graphite electrode bar and the electrode contact are subjected to butt joint and distance adjustment through the positioning mechanism and the butt joint mechanism, so that a dust removal support and a dust removal rotary table of the dust removal mechanism clean an inner cavity and an outer wall, and are overturned after moving in place without affecting butt joint; and convenience and accuracy of butt joint of the graphite electrode bar and the electrode contact are improved.

The present invention discloses an extrusion molding device for manufacturing graphite electrodes, which belongs to the technical field of graphite electrode molding devices, including a table and a pressure plate arranged above the table, wherein a plurality of pressure heads are fixedly installed on the bottom surface of the pressure plate, and a plurality of molding holes cooperating with the pressure heads are opened on the top surface of the table, wherein a push block is slidably assembled inside the molding hole, and the bottom end of the push block is rotatably connected to a lifting rod, which passes downward through the table and is threadedly connected to the table; when the pressure head moves out of the molding hole, it drives the ring to rotate again, and when the push block just pushes the molded product to move above the table, the slider can move out of the slide groove, thereby preventing the lifting rod from continuing to move upward. Based on the above structure, even if the amount of raw materials in each molding hole is different, when the push block pushes the molded product to move just above the table, the slider can be disengaged from the slide groove, so that the push block remains stable, which is conducive to the push plate to push out each molded product.

The present invention discloses a graphite electrode roasting device, which belongs to the technical field of graphite electrode roasting, comprising a furnace body, a bottom plate provided on one side of the furnace body, vertical plates fixedly installed on both sides of the top of the bottom plate, multiple sets of driving shafts and driven shafts installed between the two vertical plates, the ends of the driving shafts and the driven shafts are fixedly provided with connecting shafts, the connecting shafts pass through the vertical plates and rotate with the vertical plates, the driving shafts and the driven shafts are both rotatably sleeved with collars, and a top pressure unit is provided on the outer wall of the collar; this device can drive the graphite electrode to rotate by the arranged driving shaft and driven shaft, thereby facilitating uniform heating of the graphite electrode, and, by the arranged top pressure unit, the top pressure unit can be driven to deflect upward to a horizontal state during the counterclockwise rotation of the driving shaft, thereby facilitating the loading and unloading of the graphite electrode.

The invention discloses a graphite electrode extrusion forming device and method, and relates to the technical field of extrusion forming device.The graphite electrode extrusion forming device comprises a treatment frame, a supporting frame is fixedly connected to the top of the treatment frame, a downward pressing piece used for extrusion is arranged in the supporting frame, and a pushing piece used for downward pressing of the downward pressing piece is arranged in the supporting frame; the device further comprises a sliding seat arranged in the treatment frame, two molds are fixedly connected to the top of the sliding seat, ejection mechanisms are arranged in the two molds, the sliding seat is driven to move through repulsive force of an electromagnet plate and a magnetic plate, the foldable bag automatically adjusts the drawing amount of the lubricant according to the displacement amount, and dynamic matching of the contact area and the lubricant dosage is achieved. The limiting rod is matched with the limiting groove to ensure that the movement track of the lifting plate is accurate, so that the smearing plate and the inner wall of the pressing piece keep constant contact pressure.

The invention discloses a continuous and stable preparation device and method for a single-walled carbon nanotube, and relates to the technical field of nanocarbon material preparation, the continuous and stable preparation device for the single-walled carbon nanotube structurally comprises hollow graphite, a graphite crucible, a plasma electric arc furnace body, an air inlet and a discharge port, the hollow graphite serves as a cathode of the plasma electric arc furnace, and the graphite crucible serves as an anode of the plasma electric arc furnace. The plasma arc is initiated between the graphite electrodes, so that the plasma high-temperature evaporation catalyst is fully utilized, the defect of arc striking of a graphite cathode and a liquid catalyst anode in a conventional method is avoided, the evaporation rate of the catalyst is reduced, and the problem of arc breaking caused by metal droplet sputtering and coking in the liquid electrodes is solved; a series of defects of a conventional scheme are avoided through the convex crucible anode, so that the continuous stability of the reaction is greatly improved, and stable and continuous preparation of the single-walled carbon nanotube is realized.

The invention provides a graphite electrode protection material and a preparation method and application thereof, and relates to the technical field of graphite electrodes. Specifically, the protective material comprises the following components in parts by mass: 25-50 parts of silicon carbide, 15-25 parts of aluminum oxide, 5-10 parts of yttrium oxide, 15-25 parts of boron carbide, 10-20 parts of titanium dioxide, 10-20 parts of zirconium oxide and 5-10 parts of cerium oxide. Meanwhile, the invention also provides a method for preparing the protective layer containing the protective material on the surface of the graphite electrode. According to the integrated graphite electrode and the protective layer thereof provided by the invention, the oxidation resistance, the high temperature resistance and the bonding strength with the graphite electrode of the electrode are synchronously improved through the design of the protective material, the stability of the internal structure of the protective layer is enhanced, and the service life of the graphite electrode is effectively prolonged; good application prospects are realized in the photovoltaic field.

The invention discloses a temperature control method and system for a continuous graphitization furnace, the graphitization furnace comprises a furnace body and a pair of graphite electrodes inserted in the furnace body, and the temperature control method comprises the following steps: real-time temperature of a material in the furnace body and instantaneous power of a circuit where the graphite electrodes are located are detected in real time; calculating a temperature change rate based on the real-time temperature, and calculating a power change rate based on the instantaneous power; and the intelligent model configured based on the neural network architecture processes the real-time temperature, the temperature change rate and the power change rate to obtain a first adjustment value used for adjusting the output power of the circuit where the graphite electrode is located. According to the temperature control method for the continuous graphitization furnace, the control strategy based on data driving and the intelligent model can exceed traditional simple feedback control, accurate prediction and active intervention on the temperature of the graphitization furnace are achieved, and therefore complex thermodynamic response caused by the fact that the characteristics of materials in the furnace change along with the temperature is effectively coped with; and the graphitization process is always in the optimal temperature interval.

The present invention relates to dust detection, and in particular to a dust isolation sensor with a self-cleaning function, comprising a box body, which is provided with an air duct, which has an air inlet and an air outlet, a light-emitting component and a photosensitive component, a graphite electrode inserted in the air duct, and the graphite electrode is connected to an electrode of a DC power supply; the air inlet of the suction fan faces the air outlet of the air duct; the box body also comprises a vibration motor, which is installed on the outer wall of the air duct, and the vibration of the vibration motor drives the air duct to vibrate; the box body also comprises an air blowing nozzle, which includes an air inlet and an air blowing port, and the air blowing nozzle faces the inner cavity of the air duct, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air; the box body is connected to a ceramic bracket, which supports the graphite electrode; the part where the ceramic bracket is connected to the graphite electrode is padded with a rubber pad; the dust in the air duct is continuously removed to maintain the stability of the dust sensor during long-term use.

The invention relates to the technical field of mixing and kneading pots, and discloses a negative pressure dust collection graphite electrode raw material mixing and kneading pot, which comprises a driving assembly, the driving assembly comprises a base, the top of the base is fixedly connected with a mixing and kneading pot assembly, and the inner side of the mixing and kneading pot assembly is rotatably connected with two material cleaning assemblies. The top of the mixing and kneading pot assembly is fixedly connected with a pot cover shell, the top of the pot cover shell is sleeved with a connecting pipe, the bottom of the connecting pipe is provided with an oil gathering assembly, the bottom of the oil gathering assembly is fixedly connected with a wind wheel, and the material cleaning assembly cleans paste on the side wall of the mixing and kneading pot assembly. The connecting pipe and the oil gathering assembly are matched to polymerize and liquefy smoke and recycle and reuse the smoke in real time, the side face of the wind wheel is fixedly connected with an arc plate, the arc plate inclines by 45 degrees, the arc plate and the mixing and kneading pot assembly cooperate to promote cleaning of paste, and the problem that the smoke condenses in upper structures such as a pot cover and a vacuumizing pipeline to form hard impurities, so that the smoke cannot be recycled is solved. And the final quality of the electrode is seriously influenced.

The invention discloses a preparation method of a threaded joint of a graphite electrode, which comprises the following steps: material preparation: carrying out mixing kneading, molding, roasting and graphitization treatment on needle coke aggregate and a coal pitch binder to prepare a graphite joint blank; in the mixing and kneading process, graphene nanosheets with the mass percent of 0.5%-5% are added into raw materials to serve as conductive reinforcing phases, dispersion of the raw materials is promoted through the technology of combining ultrasonic dispersion and mechanical stirring, and the graphite material with the volume density larger than or equal to 1.70 g / cm < 3 >, the apparent porosity smaller than or equal to 3% and the axial conductivity larger than or equal to 5 * 10 < 4 > S / m is obtained. Compared with the prior art, the preparation method of the threaded joint of the graphite electrode has the advantages that the threaded joint can adapt to the high-temperature working condition, connection stability is kept, the conductivity is excellent, and the service life is long.

The application belongs to the technical field of graphene material preparation, and particularly relates to a general covalent functionalized graphene (CFG) electrochemical preparation method, which comprises the following steps: (1) under the condition of a light sealing oil seal, graphite electrodes are subjected to electrochemical intercalation treatment by using concentrated sulfuric acid; (2) after the intercalation is completed, light sealing oil is injected into an electrolytic cell while the concentrated sulfuric acid is discharged; (3) in the electrolytic cell, a micro-liquid film reaction zone is constructed by using the density and phase solubility difference of the light sealing oil, the aqueous electrolyte and the heavy sealing oil, and the micro-liquid film reaction zone is contacted with the intercalated graphite electrode to make the intercalated graphite electrode electrochemically oxidized to generate CFG; (4) by controlling the relative intercalated graphite electrode of the micro-liquid film reaction zone to move directionally, the whole intercalated graphite electrode is gradually and completely converted into CFG; (5) the CFG structure after the reaction is placed into a solvent to be mechanically exfoliated to prepare a CFG dispersion liquid, and the CFG powder is obtained after drying treatment.