314results about "Electric discharge heating" patented technology

The invention discloses a yellow phosphorus furnace electrode paste and a preparation method thereof, and belongs to the technical field of yellow phosphorus furnace production, the yellow phosphorus furnace electrode paste comprises the following raw materials by mass: 55-65% of anthracite particles, 20-25% of petroleum coke, 5-10% of graphite chips, 18-25% of a composite binder, 0.3-1.5% of a composite antioxidant and 1.5-4.5% of an additive; the yellow phosphorus furnace electrode paste provided by the invention is produced according to the preparation method provided by the invention, and the resistivity, compressive strength and oxidation resistance can be synchronously improved through the design of carbon material multistage particle size distribution, a nano-reinforced composite binder and a synergistic anti-oxidation system in combination with an efficient drying and densification process; the problem that an existing electrode paste is poor in density and performance is effectively solved.

The invention discloses an iron alloy electrode paste and a preparation process, and belongs to the technical field of electrode paste preparation, the iron alloy electrode paste comprises a composite aggregate system and a composite binder system, the composite aggregate system comprises the following components by mass: 40-60% of anthracite aggregate, 15-25% of artificial graphite flake, and 3-8% of silicon carbide whisker; the composite binder system comprises the following components in percentage by mass: 70-80% of medium-temperature modified coal pitch, 10-15% of furan resin and 5-10% of dispersion liquid containing nano boron carbide, and the composite binder system is combined with the composite aggregate system through a gradient permeation process to form a three-dimensional conductive network and an enhanced interface; the composite aggregate system and the composite binder system are optimally proportioned, and gradient permeation and gradient kneading processes are combined, so that the comprehensive performance of the electrode paste is remarkably improved, the thermal shock resistance is greatly improved and the linear shrinkage rate is reduced while low resistivity is maintained, the electrode paste is suitable for smelting ferroalloys such as silicomanganese and ferrochromium, and the service life is remarkably prolonged.

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 technical field of electrode paste, in particular to electrode paste for a submerged arc furnace and a preparation method of the electrode paste. Comprising three-level grain size distribution anthracite aggregate which is electrically calcined at high temperature and modified by a KH-550 silane coupling agent, a modified silicon carbide whisker and boron-doped graphene-like carbon nitride composite filler, a maleic anhydride-mediated compatible medium-temperature pitch-polyborosiloxane binder and a graphite powder-borax functional additive. A step-by-step mixing and two-stage sintering process is adopted in the preparation process, a covalent bond interface bridging structure is constructed through the coupling agent, the composite dispersing agent regulates and controls the multi-dimensional network distribution of the filler, and the process synergistically improves the compactness and the interface bonding force of the green body. The electrode paste is firm in interface bonding, can form a ceramic protective phase at a high temperature, has excellent conductivity and mechanical strength, and prolongs the service life of the electrode paste for the submerged arc furnace.

The invention discloses an efficient electric flame furnace end and an electric flame stove. The efficient electric flame furnace end comprises a shell, a single anode needle, a single cathode tube, a ceramic tube, an air duct inner wall, an air duct outer wall, a heating coil and an airflow generation assembly. The single anode needle and the single cathode tube are arranged, the actual discharge gap between the single anode needle and the single cathode tube can be set to be 10-20 cm and is far larger than the preset discharge distance, air thermal breakdown can still be achieved by adopting stable breakdown voltage in the prior art, extra voltage increase is not needed, meanwhile, the long-distance arrangement of the single anode needle and the single cathode tube is achieved, and the service life of the anode needle and the cathode tube is prolonged. The collision probability of gas molecules and electric field electrons is increased through the long arc, and high-efficiency heating is achieved; in addition, due to the arrangement of the single anode needle and the single cathode tube, the structure of the furnace end is simplified, the number of electrodes and a complex arrangement structure are reduced, and the assembly difficulty and the production and manufacturing cost are reduced; and meanwhile, the simplified structure enables air flow in the furnace end to be smoother, electric field distribution to be more concentrated, and the problems of mutual interference among multiple electrodes, electric field disorder and unstable discharge are avoided.

A hybrid ultra-high enthalpy arc heater comprises a rear electrode group, a contraction section, a compression channel, a throat, an expansion section, and a front electrode group. The arc cathode is attached to the electrode of the rear electrode group. The contraction section is mainly used to compress the arc column, completing the first plasma acceleration. The compression channel is used to compress and elongate the arc column, fully heating and ionizing the working gas. The airflow is concentrated to high pressure at the throat, completing the second plasma acceleration. The airflow completes the third plasma acceleration in the expansion section. The arc cathode is attached to the electrode terminal of the front electrode group, where the plasma is subjected to the Lorentz force, achieving the fourth acceleration and ultimately forming an ultra-high enthalpy flow field. This invention can be applied to the field of aerodynamic thermal ground simulation technology research, mainly providing medium and low pressure ultra-high enthalpy uniform flow fields.

The utility model relates to electrode holder sealing technical field, concretely is a kind of ore-heating furnace electrode holder sealing sleeve, including annular water cooling jacket, the sealing ring and sealing ring locking assembly of being arranged in water cooling jacket, platen assembly on water cooling jacket;The sealing ring locking assembly includes two half-round hoops and two screw rods, the end of two The hoop is connected by two screw rods respectively and is annular and located the outside of sealing ring, nut is equipped on the screw rod, the compression spring between the nut and the hoop end portion is set on the screw rod sleeve location.The utility model sealing ring adopts alloy copper H94 material, with high strength, wear resistance and ductility, its upper and lower two parts are each by multiple equal division sector half ring constitutes, by stainless steel hoop and compression spring form adjustable hold tight force.When protective sleeve generates reaction force due to error or deformation, compression spring can slightly loosen, both can adapt holder action, and can maintain sealing pressure, effectively block high-temperature gas and dust leakage.

The utility model discloses an auxiliary electrode of a direct-current electric arc furnace, which belongs to the technical field of electric arc furnaces and is characterized in that an auxiliary anode is arranged, so that the cathode current of the electric arc furnace is increased under the condition that the anode current of the electric arc furnace is not changed, and the temperature of a cathode molten pool of the electric arc furnace is increased; the auxiliary anode does not need to be additionally provided with a direct-current power supply, the silicon controlled rectifier power supplies of the anode and the cathode of the electric arc furnace are directly utilized, the equipment investment is greatly reduced, the power supply structure is simplified, and the silicon controlled rectifier four-electrode without the bottom electrode is also suitable for the direct-current electric arc furnace with six or more electrodes. The two IGBTs can be combined into one IGBT.

The invention relates to a pressure ring assembly, a pressure ring section and a wedge connector between pressure ring sections. The pressure ring assembly (10) includes at least a first section (12.1) and a second section (12.2) connected to each other in an abutting relationship by a removable wedge connector (14) including a first fork (36) and a second fork (38). Each section comprises a body (20) extending in an arcuate manner between a first side wall (22) and a second side wall (24) thereof. Each section defines a first elongated aperture (26) and a second elongated aperture (28). Each hole has a rounded wall section (30) facing the adjacent side wall with a radius of at least 15 mm. The first fork and the second fork are separated from each other at an angle less than 15 degrees. The first fork extends into the second bore of the first section and the second fork extends into the first bore of the second section. The mutually facing contact surfaces (46, 48) of the first and second forks have a contour complementary to the rounded wall section (30) of the bore.

The converter device is configured to convert a DC voltage and a DC current into an AC voltage and an AC current that is supplied to a load (L). The converter device comprises a bank (11) of capacitors (12), a plurality of power semiconductors (13), a heat sink (14), and a casing (15).

This invention discloses a feeding device and a feeding method for electrodes in an electronic glass furnace, belonging to the field of auxiliary equipment for electronic glass furnaces, comprising: a drive gear, an output gear, a drive motor, a connecting component, and a fixed motion component; wherein several output gears are each toothed with the drive gear, wherein both the output gears and the drive gear are rotatably mounted on the fixed motion component, wherein the front end of the transmission shaft of the output gears is connected to the connecting component, wherein the output gear is connected via the connecting component to the feed threaded rod of the electrode in the electronic glass furnace in use and is driven synchronously, wherein the rear end of the central shaft of the drive gear is connected to the drive motor.This invention solves the problem, according to the prior art, that the feed accuracy of the feed thread rod is low when inserting the electrode.

A dual electrode DC electric arc melter 10 for a conductive material 12 comprises a vessel 14 for holding the material. The vessel comprises a sidewall 16, a roof 18 and a bottom 20 and defines a taphole 22 for molten metal. A tilting mechanism 24 enables selective tilting of the vessel to tap the molten metal from the vessel. First 26 and second 28 electrodes, in a normal operative position, extend through the roof into the vessel. An electrode manipulating arrangement 30 is configured to move the electrodes between the normal operative position and a position away from the vessel. A DC power system 32 drives via a DC output the first electrode as a cathode and the second electrode as an anode. An arc deflection compensation circuit 50 is provided for reducing deflection towards the sidewall of arcs extending from the first and second electrodes.

The invention discloses a modified additive, electrode paste based on the modified additive and a preparation method of the electrode paste, and belongs to the technical field of electrode paste preparation. The preparation method comprises the following steps: by taking asphalt compositely modified by natural latex and nano silicon dioxide as a core, constructing a carboxylated nano cellulose connecting layer on the surface of the core through an emulsification technology, then constructing a graphene oxide shell layer outside the connecting layer, and drying to form a modified additive with a core-shell structure; the modified additive disclosed by the invention can restrain the core asphalt in the electrode paste sintering stage, prevent the core asphalt from flowing too early, and stabilize the paste column form to restrain layering; carboxylated nanocellulose is carbonized at high temperature to generate short-range carbon fibers, graphene oxide is reduced into reduced graphene oxide, the short-range carbon fibers and the reduced graphene oxide are interwoven with a modified asphalt coking product to form a composite reinforced network, and the mechanical strength and toughness of the electrode are improved; the modified additive disclosed by the invention is added into aggregate, powder and an adhesive in a dry mixing stage to prepare the electrode paste based on the modified additive, and the electrode paste has relatively good hard fracture resistance.

The power supply system (1) for arc furnace (2), includes: - a power converter (9), and - a polyphase transformer (10), The power supply system further comprises first disconnecting means (13) connecting the input of the power converter to the primary circuit, second disconnecting means (14) connecting the output of the power converter to the primary circuit, and the power supply system further comprises a control circuit (11) configured: o to control the power converter to supply the electrode and to stabilize the courant and the voltage delivered by the grid to reduce reactions in the grid when the first disconnecting means are open and the second disconnecting means are closed, and o to control the power converter to stabilize the courant and the voltage delivered by the grid to reduce reactions in the grid when the first disconnecting means are closed and the second disconnecting means are open.

The utility model relates to a graphite electrode structure, and belongs to the technical field of graphite electrodes. The graphite electrode assembly comprises a graphite reducer union, a graphite screw rod, a graphite joint and a graphite electrode, a first internal threaded hole and a second internal threaded hole are formed in the graphite reducer union, the first internal threaded hole is formed above the second internal threaded hole, the diameter of the first internal threaded hole is larger than that of the second internal threaded hole, and the first internal threaded hole is in threaded connection with an external thread of a copper rod; the upper end of the graphite screw rod is in threaded connection with the second inner threaded hole; the graphite joint is provided with an internal thread and is in threaded connection with the lower end of the graphite screw rod, so that the upper end surface of the graphite joint is propped against the lower end surface of the graphite reducing joint; the graphite electrode comprises an upper end part and a body part, the body part is arranged below the upper end part, the upper end part is provided with an external thread, the external thread of the upper end part is in threaded connection with the internal thread of the graphite joint, and the body part is used for discharging. The graphite electrode has the effect of improving the problem that the graphite electrode is prone to arc breaking.

The invention relates to a system and method for bottom electrode compound bottom blowing of multi-media of DC electric arc furnace, which belongs to the field of steelmaking technology. The system includes a plurality of bottom electrodes located at the bottom of furnace, wherein some of the bottom electrodes are bottom blowing electrodes with hollow structures, and some of the bottom blowing electrodes are at least one type of Type I bottom electrode, Type II bottom electrode and Type III bottom electrode; the Type I bottom electrode is used to blow carbonaceous materials into the molten pool to carburize the molten pool to accelerate scrap melting; the Type II bottom electrode is used to blow slagging powder into the molten pool to form molten slag particles in the molten metal to increase the gas-slag-gold three-phase reaction interface area during the dephosphorization reaction; the Type III bottom electrode is used to blow gas into the molten pool to accelerate mass transfer in the molten pool; the system also includes a control unit connected to the bottom blowing electrode to realize online adjustment of the blowing parameters in combination with the power supply intensity of the bottom blowing electrode during the smelting process. The invention can improve production efficiency and reduce consumption of raw and auxiliary materials.

A DC arc furnace 10 comprises a vessel 12 comprising a roof 14, a base 16 and a sidewall 18. The vessel defines a chamber 20 for a body of material having an upper surface 44. An anode electrode 24 and a cathode electrode 26 extend parallel to one another and terminate a distance d from the upper surface. The anode and cathode are located on a first horizontal line 28 and define a gap between them. A first conductor 36 links a positive pole 32 to the anode and a second conductor 38 links a negative pole to the cathode. The first conductor comprises a first section 36.1 extending continuously underneath the base parallel to the first line, so that current flows in the first section in a direction A directly opposite to current flow B through the body of material between the anode and the cathode.

The application discloses a kind of high-efficiency electric flame burner and electric flame stove, shell, single anode needle, single cathode tube, ceramic tube, air duct inner wall, air duct outer wall, heating coil and airflow generating assembly.Single anode needle and single cathode tube are provided, and the actual discharge gap of both can be set to 10-20CM, which is much larger than the preset discharge distance. Using the stable breakdown voltage of the prior art, air thermal breakdown can still be achieved without additional voltage increase. At the same time, the long-distance arrangement of the single anode needle and the single cathode tube increases the collision probability of gas molecules and electric field electrons for long arcs, achieving high-efficiency heating. In addition, the arrangement of the single anode needle and the single cathode tube simplifies the structure of the burner, reduces the number of electrodes and the complex arrangement structure, and reduces the assembly difficulty and production cost. At the same time, the simplified structure makes the airflow in the burner more smooth and the electric field distribution more concentrated, avoiding the problems of mutual interference between multiple electrodes, electric field disorder and unstable discharge.

The application relates to the technical field of aircraft fairing, and discloses an electric heating assembly and an air inlet fairing applying the electric heating assembly, the electric heating assembly is applied to ice prevention and deicing of the air inlet fairing, and the electric heating assembly comprises a first heating piece and a second heating piece; the first heating piece is arranged from a near tip to a peripheral wall of the air inlet fairing, a first electrode of the first heating piece and the tip of the fairing form a first temperature zone, a second temperature zone is formed between the first electrode and a second electrode, and a first difference value between an average temperature of the second temperature zone and an average temperature of the first temperature zone is obvious to meet the requirement of a higher temperature of the tip; the first temperature zone is arranged to realize directional heating of the tip area, the ice prevention and deicing capacity of the tip area is obviously improved, and the problem of insufficient heating of the tip and easy icing in the prior art is solved.

The present invention provides a method for suppressing voltage flicker in an electric furnace, which can suppress voltage flicker while maintaining the operational efficiency of the electric furnace. [Solution] A voltage flicker measurement step ST1 is performed by initializing and measuring the integrated value of voltage flicker every minute using a flicker meter 6 connected to a power transmission and distribution line 2 that supplies power to an electric furnace 3 that uses an arc, and ΔV 10 If the value exceeds a preset reference value, the applied voltage applied to the arc generating electrode 31 is reduced by a set amount in an applied voltage reduction step ST2, and after the applied voltage is reduced, the change in the cumulative value of voltage flicker Δa over a set time Δt shorter than 1 minute is compared with a threshold value Δst that is smaller than the reference value, and a determination step ST3 is performed to determine the relationship between the two.

A method of heating an aerosol generating article which includes a capacitor with an electrolyte, includes at least one of discharging and charging the capacitor to heat the electrolyte and thereby generate an aerosol for inhalation by a user. An aerosol generating device may be adapted to receive, in use, the aerosol generating article.

The application belongs to the technical field of graphitization, and provides a quick connection and disconnection system of a graphitization furnace, a graphitization production system and a power transmission method. The quick connection and disconnection system comprises: a fixed end connection device adapted to be connected with a first furnace head, the fixed end connection device comprising an electrode holder; a movable end connection device adapted to be connected with a second furnace head, the movable end connection device comprising an electrode holder and a conductive connection structure; wherein the electrode holder comprises a first conductive piece located on both sides of the electrode of each furnace head, a pressing plate and a first telescopic device connected with the pressing plate, the first telescopic device being adapted to push the pressing plate located on both sides of the electrode of the furnace head after being started to push the first conductive piece to move towards the direction close to the electrode of the furnace head and make the first conductive piece press the electrode of the furnace head from both sides. The application can quickly and stably realize the power transmission connection and disconnection of the electrode of the furnace head of the graphitization furnace, and improve the production safety, reliability and production efficiency of the graphitization furnace.

The utility model discloses an optical fiber welding circuit, which relates to the technical field of optical fibers, and comprises a power supply, a control module, a voltage doubling module, a current sampling module, a first electrode needle and a second electrode needle, and the control module comprises a control unit and a voltage output unit; when an arc current signal received by the feedback end of an error amplifier in the control unit is increased, the voltage of the output end of the error amplifier is reduced, and when the voltage of the output end of the error amplifier is reduced, the PWM duty ratio output by the duty ratio output end of the control unit is reduced. When the arc current signal received by the feedback end of the error amplifier of the control module is increased, the voltage of the output end of the error amplifier is increased, and when the voltage of the output end of the error amplifier is increased, the PWM duty ratio output by the duty ratio output end of the control unit is increased. According to the utility model, the technical problem of unstable optical fiber welding is solved.

Provided is a method for preparing zirconium boride through electric smelting. The method includes: mixing a zirconium source, boric anhydride, and a carbon source to obtain a furnace charge; conducting a smelting by feeding the furnace charge into a three-phase electric arc furnace and melting, subjecting a resulting material to refinement, heat preservation, and homogenization in sequence; heat preserving a resulting product for 1 hour to 2 hours after the smelting, and turning off the three-phase electric arc furnace; removing a resulting furnace shell and natural cooling a resulting melt; and crushing the resulting melt, selecting and removing a material skin; crushing a resulting selected material and selecting again, and removing a loose lump and collecting a dense lumpy material; and crushing the dense lumpy material, and then testing to qualify as a finished product.

The present invention is directed the use of a carbon precursor material in the manufacturing of battery electrodes is provided, said carbon precursor material comprising at least 50% by weight of a petroleum-derived pitch product characterized by a Alcan coking value of between 44 and 80 wt% as measured according to ASTM D4715 and by having a concentration of at least 80%weight asphaltenes as measured by Clay-Gel Absorption Chromatographic Method according to ASTM D2007.

The utility model discloses a high-strength graphite electrode, which belongs to the technical field of graphite electrodes and comprises a graphite electrode body and a connector, internal threads are respectively arranged at two ends of the graphite electrode body, a first external thread is arranged on the connector, a second external thread is arranged on the connector, a vertical groove is arranged on one side of the connector, and the vertical groove is connected with the graphite electrode body. A groove is formed in the graphite electrode body, an inner core of the graphite electrode body is a graphite electrode layer, the outer side of the graphite electrode layer is wrapped with a self-baking electrode, reinforcing ribs are uniformly distributed in the self-baking electrode, and the outer side of the self-baking electrode is wrapped with a wrapping layer; according to the high-strength graphite electrode, the interlayer shear strength is improved through the carbon nano reinforcing ribs, under the action of the vertical grooves and the grooves, stress is dispersed, the service life is prolonged, the weight of the graphite electrode body of the hollow structure is reduced, hot melting is reduced, the self-baking electrode has a self-repairing function, the consumption of the electrode is reduced, and the service life of the electrode is prolonged. And the anti-oxidation service life is prolonged through the coating layer of the amorphous carbon layer.

The present invention relates to a control system for automatically adjusting the current of an AC arc heater, belonging to the technical field of power electronic current conversion. A PLC control module and a circuit breaker trigger control unit are mainly used to implement thyristor solid-state switches to control the on-off state of different taps of a choke reactor in the circuit, thereby achieving automatic adjustment of the operating current of the AC arc heater. The present invention adopts industrial network technology and PLC technology to achieve automatic adjustment of the current of the AC arc heater, avoiding manual replacement of taps and improving work efficiency. The application of advanced thyristor solid-state switch technology improves the reliability and safety of the equipment and reduces the failure rate of the equipment.

The present application relates to the technical fields of hydrothermal liquefaction, and discloses an electrode reaction kettle, which comprises a reaction kettle cavity, a drain port arranged at the bottom of the reaction kettle cavity, a cavity cover arranged at the top of the reaction kettle cavity, and a feed inlet, a liquid inlet, an air inlet and an exhaust port arranged on the cavity cover; and a plasma device fixed to the reaction kettle cavity and / or the cavity cover, which is used to discharge electricity into the reaction kettle cavity to generate plasma. The present application does not involve the use of catalysts, is green and environmentally friendly, and is used for plastic degradation without involving the use of a large amount of catalysts, thus avoiding the phenomenon of subsequent separation and purification difficulties. The electrode reaction kettle can realize the plasma electrolytic degradation of plastics, and the operation process is simple and suitable for industrial production.

The present invention relates to an electric arc furnace (1) comprising an electrode handling apparatus (30), comprising an electrode holder clamp (31) configured to vertically support said one or more electrodes; a first detection apparatus (40) configured to detect in real time the vertical position of said electrode-holder clamp (31) relative to a predefined reference point; - an image acquisition apparatus (60) configured to acquire images of said one or more electrodes when they are removed from the shell (10) and are positioned relative to the roof (20) in such a way that the tip and optionally also the wear zone are framed; a control unit of the electric arc furnace (70) comprising in turn an electrode adjustment system (700) which is configured to adjust the ignition and positioning of the electrodes inside the shell and is operatively connected to said electrode handling apparatus (30). Said control unit of the electric arc furnace (70) is operatively connected to said first detection apparatus (40) to acquire in real time the vertical position (YF) of said electrode-holder clamp relative to said predefined reference point and to said image acquisition apparatus ( 60 ) to acquire images of said electrodes. Said unit ( 70 ) is configured to process said images in such a way that at each electrode removal and for each electrode it calculates the length of the electrode (L Emin F). Said control unit of the electric arc furnace ( 70 ) is configured to calculate the vertical position (YE ) taken over time by the tip of the electrode relative to said predefined reference point, knowing the vertical position (YE) of said electrode- holder clamp acquired by said first detection apparatus ( 40 ) and the length of the electrode (L). Said control unit of the electric arc furnace ( 70 ) is configured to adj ust, via said electrode adj ustment system ( 700 ), the movements of the electrodes relative to the shell ( 10 ) in terms of vertical position and / or speed and / or the ignition time of the arc, as a function of predefined electrode management programs in different operating steps of the electric arc furnace based on the vertical position taken by the tip of the electrode, and / or is configured to generate an alarm signal in the event that, during one or more steps of the furnace operating cycle the trend of the vertical position taken by the tip of the electrode follows a temporal profile that deviates at least in part from a reference temporal profile within predefined tolerances.

The present invention discloses a furnace power supply apparatus (100) for the supply of an electric arc furnace, electric re- duction furnace or a submerged arc-resistance furnace with elec- tric energy, - wherein the furnace power supply apparatus (100) is con- nectable to a three phase power network (110), - wherein the furnace power supply apparatus (100) is con- nectable to at least one electrode (120), - wherein the furnace power supply apparatus (100) comprises: - at least one AC / DC converter circuit (130) connectable to the three phase power network (110) and configured to rectify an alternating current of at least one phase of the three phase power network (110), - at least one DC / DC converter circuit (150) configured to handle a voltage level higher than or equal to 500 VDC.