176results about "Electric discharge heating" patented technology

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.

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 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.

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.

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 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.

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.

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 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 relates to a system for injecting gas into an electric arc furnace, comprising an electrode (111) with a bore (112), an electrode support beam (105) with an electrode holder, a gas supply (121), a supply hose (122) connected to the gas supply (121) and a gas coupler (204) for connecting the supply hose (122) to the bore (112) of the electrode (111). A telescope arm (201) is installed at the electrode support beam (105) and the supply hose (122) is mounted to the telescope arm (201).

The utility model provides a flange plate, and relates to the technical field of mechanical connecting pieces, the flange plate provided by the utility model comprises a lower plate body and an upper plate body, the lower plate body is connected with the upper plate body, and a cooling channel for circulating cooling liquid is formed between the lower plate body and the upper plate body; the cooling channel in the flowing direction of the cooling liquid comprises a plurality of curved channels which are sequentially communicated, the rotating directions of any two adjacent curved channels are opposite, and the lower disc body is provided with a first inlet communicated with the curved channel at the head end and a first outlet communicated with the curved channel at the tail end. The flange plate provided by the utility model has a better heat dissipation effect, ensures the safety and stability of equipment, and does not cause thermal interference to other components around.

The utility model relates to a water-cooled electrode structure, and belongs to the field of semiconductors. The water-cooling type graphite electrode water-cooling device comprises a third metal sealing flange, a first rubber ring, a water-cooling flange, an insulating ceramic ring, a graphite electrode, a copper electrode, a rotating copper head pressing plate, a rotating copper head, an electrode connector, a pagoda connector, a cold elbow, a cooling water pipe and an insulating rubber ring supporting frame, the insulating ceramic ring is arranged in the water-cooling flange, and the graphite electrode is installed at one end of the copper electrode; one end of the cooling water pipe is located in the copper electrode, the other end of the cooling water pipe is connected with one end of the cold elbow, the other end of the cold elbow is connected with the pagoda connector, one end of the electrode connector is arranged on the rotating copper head, and the third metal sealing flange is arranged outside the copper electrode and between the insulating ceramic ring and the insulating rubber ring supporting frame. A first rubber ring is arranged between the water cooling flange and the third metal sealing flange. The sealing device is reasonable in structural design, safe, reliable and convenient to assemble and disassemble, the service life is prolonged, the sealing effect is improved, and the use requirement is met.

A localized heating device includes a plasma deforming portion and a heating portion. The plasma deforming portion includes an inlet end having a circular hole, an outlet end having an elongated hole with a first length and a first width, and a channel smoothly connected with the circular hole and the elongated hole. The heating portion, disposed at the outlet end, includes two control covers spaced by a slot. The elongated hole and the slot being oppositely disposed with respect to the plasma deforming portion. A plasma flow provided by a plasma producing source being to enter the channel via the circular hole, then to flow through the elongated hole, and finally to reach the slot.

The invention relates to the technical field of carbon-based negative electrode manufacturing, and discloses a graphitized electrode manufacturing method, which comprises the following steps of: firstly preparing electrode blanks, then serially connecting the electrode blanks, charging the electrode blanks in a furnace, wrapping an insulating isolation layer and covering a composite heat preservation material containing ferrous oxalate, and electrifying and graphitizing in stages: electrifying and heating the composite heat preservation material to 190-250 DEG C; the released carbon monoxide gas is diffused to the electrode joint through the insulating isolation layer to form active protection gas; according to the process, a reductive protection environment is established in advance before the graphitization high-temperature stage is started, and shunting of main current by the heat preservation material is eliminated, so that oxidation of a joint is effectively prevented, and the heat preservation effect is improved. Uniform and efficient heating is ensured, and finally the graphitized electrode with a compact structure and uniform performance is obtained.

Systems and methods for creating molten metal droplets are disclosed. The systems may be used for 3D printing. The system relies on a change in momentum of the droplet relative to the tip of the metal microwire to cause the droplet to separate from the tip of the metal microwire. The change in momentum can be created using a force generator. In some embodiments, the system can adjust electrical parameters to form metal droplets with desired parameters.

A device (10) for powering a furnace (100) for melting and / or heating metal material provided with electrodes (102), comprising at least one power supply line (201, 201L, 201M) and connected at least one base module (20, 120, 220) configured to convert an alternating power grid voltage and current (Ur, Ir) having a power grid frequency (fr) into an alternating power supply voltage and current (Ua, Ia) having a desired power supply frequency (fa), wherein the at least one base module (20, 120, 220) comprises a transformer (11), a plurality of rectifiers (14) connected to the transformer (11), one or more DC intermediate circuits (16) configured to store electrical energy, a plurality of inverter devices (15), and a control and command unit (17) configured to control and command operation of the inverter devices (15) and adjust the supply frequency (fa). The invention also relates to a method for powering a furnace (100) for smelting and / or heating metallic material.

A method of heating an aerosol-generating article (1) is described. The article (1) includes a capacitor (6) having an electrolyte. The method includes heating the electrolyte by performing at least one of discharging and charging the capacitor (6), thereby generating an aerosol for inhalation by a user.

The utility model discloses a vacuum heat treatment furnace electrode, belongs to the technical field of sintering equipment, and aims to solve the problem of how to improve the mounting convenience of a cooling piece. The vacuum heat treatment furnace electrode comprises an electrode main body, a cooling piece and a sleeve, a connecting hole is formed in one end of the electrode body, and an exhaust hole is formed in the bottom of the connecting hole and penetrates out of the electrode body. One end of the cooling piece is arranged in the connecting hole, a reserved cavity is formed between the cooling piece and the bottom of the connecting hole, a cooling channel for conveying cooling liquid is arranged in the cooling piece, and the two ends of the cooling channel are connected with a cooling liquid inlet and a cooling liquid outlet respectively; the sleeve sleeves the cooling piece and the electrode main body, and an exhaust channel is formed between the inner wall of the sleeve and the outer wall of the electrode main body and is communicated with the outside of the sleeve and the exhaust hole. According to the vacuum heat treatment furnace electrode, by arranging the exhaust channel formed by the exhaust hole and the sleeve, the air resistance phenomenon is avoided, the installation convenience can be improved, and the fatigue life of the end of the electrode body is prolonged.

The present invention relates to remelting plants for metals, such as vacuum arc furnaces (vacuum arc remelting, VAR) and electro slag remelting plants (electro slag remelting, ESR), which have one or more melting locations. The plants have a uniformly low overall height and allow weighing with the highest precision. For this purpose, they are provided with a non-coaxially driven electrode rod (140) and a weighing device (230, 240) arranged laterally. The electrode is centered without generating transverse forces which have a negative influence on the plant structure and the weighing result.

The invention discloses a graphitization process of an extra-large-diameter graphite electrode, and relates to the technical field of carbon material manufacturing, and the graphitization process comprises the following steps: preparing for charging, distributing resistance, precisely machining the end surface of a roasted product electrode, and matching according to the resistivity. The method comprises the following steps: precisely machining the end surface of the roasted product electrode; strictly matching the electrodes of the same furnace according to the resistivity to ensure that the range is less than 5 mu omega.m, and matching the furnace resistance of the two furnaces in parallel power transmission; by adopting a large-head-to-small-head series connection column assembling mode, the resistivity is as low as about 10 mu omega.m, and the performance is excellent and stable; the direct heating of the internal skewering furnace is combined with the optimized power transmission curve, so that the production efficiency is greatly improved; according to the whole process, parameterized and monitorable closed-loop control of the whole process is achieved from furnace charging resistance distribution and constant-current power transmission to spray cooling, and the method is particularly suitable for large-scale and stable production of electrodes with extra-large diameters.

A pressure ring assembly (10) comprises at least first and second segments 12.1, 12.2 which are connected to one another in abutting relationship by a removable wedge connector 14 comprising first and second prongs 36, 38. Each segment comprises a body 20 extending arcuately between first and second side walls 22, 24 thereof. Each segment defines first and second elongate bores 26, 28. Each bore has a radiused wall section 30 facing the adjacent side wall, the radius being at least 15 mm. The first and second prongs diverge away from one another at an angle of less than 15 degrees. The first prong extends into the second bore of the first segment and the second prong extends into the first bore of the second segment. Mutually facing contact faces 46, 48 of the first and second prongs have profiles complementary to the radiused wall sections 30 of the bores.

The present invention is a carbon electrode used for an arc discharge for manufacturing a quartz glass crucible, wherein at least one of a concave pattern and a convex pattern is formed on a surface of the carbon electrode in at least a range of 50 mm to 130 mm in a longitudinal direction of the carbon electrode from an end portion where the arc discharge takes place. Consequently, a carbon electrode that can suppress agglomeration of silica fume on the carbon electrode while manufacturing a quartz glass crucible is provided.

The invention discloses a composite additive for improving the overburning resistance of electrode paste as well as a preparation method and application of the composite additive, and belongs to the technical field of electrode paste preparation. Graphene compounded aluminum nitride particles serve as a core, a uniform silicon carbide layer is constructed on the surface of the core through a fluidized bed chemical vapor deposition method, a shell layer with cardanol-based phenolic resin, carbon black and a silane coupling agent as main components is constructed on the surface of the silicon carbide layer, and the composite additive of a complete core-shell structure is formed. The shell layer of the additive keeps a complete structure when the temperature is lower than 600 DEG C, erosion of volatile components in electrode paste to core silicon carbide particles is reduced, when the temperature is increased to be higher than 600 DEG C, the shell layer is gradually decomposed, the inner core silicon carbide particles are released, the heat conduction and shunting effects are achieved, and electrode paste overburning caused by current gathering and local overheating is avoided; the composite additive disclosed by the invention is added in an electrode paste mixing stage, so that the overburning resistance of the electrode paste can be improved.

An apparatus (10) for the electric power supply of furnaces (100) for melting and / or heating metal materials provided with electrodes (102) comprises at least one power supply line (201, 20 IL, 20 IM) and at least one connected base module (20, 120, 220) which is configured to convert an alternating mains voltage and current (Ur, Ir) having a mains frequency (ft) into alternating supply voltage and current (Ua, la) with a desired power supply frequency (fa), wherein the at least one base module (20, 120, 220) comprises a transformer (11), a plurality of rectifiers (14) connected to the transformer (11), one or more direct current intermediate circuits (16) configured to store electrical energy, a plurality of inverter devices (15) and a control and command unit (17) configured to control and command the operation of the inverter devices (15) and adjust the power supply frequency (fa). The invention also concerns a method for the electric power supply of furnaces (100) for melting and / or heating metal materials.