摘要:
A channel type induction furnace with a furnace floor that is inclined downwards from an operative rear of the furnace hearth towards an opposing operative front of the hearth, with a wall at the front comprising a bottom section and a top section, with the bottom section extending further into the hearth than the top section, and the bottom section terminating in an upper edge in abutment with the top section, with a down-passage to an induction heater, located proximate the front wall, having an inlet in the floor at a location proximate the base of the front wall and up passage(s) having an outlet in the floor at a location in abutment with the base of the bottom section and with the bottom section being provided with a vertical slot extending upwards above the or each up-passage through it and opening onto the upper edge of the bottom section.
摘要:
A heating apparatus includes a steel belt conveyer having a steel belt with a top part that transports and heats, and induction heating coils having an elliptical or a rectangular shape disposed under or over the top part of the steel belt such that the longitudinal direction of each of the induction heating coils forms an angle of 45° to 135° inclusive with the moving direction of the steel belt. A heating stabilization device can be used in such an apparatus. The heating stabilization device has one or a plurality of rollers that are brought into contact with the top surface of the top part of the steel belt so that the top part of the steel belt is prevented from rising during a heating operation.
摘要:
An apparatus (10) and method for preheating welds uses a centered induction plate (12) having preferably a plurality of induction coils (30, 32) to impart the generation of heat in the materials to be welded (14), being interactively controlled by at least a temperature sensor (90, 92) and power supply control loop (16) so that even preheating can be obtained for a selected length of time given the parameters of the weld desired.
摘要:
A method of continuous rolling comprises the steps of: forming a continuous billet 20 by joining a rear end of preceding billet 21 with a front end of succeeding billet 21 by flash-butt welding 3; removing burr on welded portions of the continuous billets 20; then rolling the continuous billet 20 in a rolling mill line 6; wherein locally cold portions produced by clamping at welding are reheated after removing the burr using a travelling induction-heating unit 5 running at a speed synchronously with a running speed of the continuous billet 20, which travelling induction-heating unit 5 is provided with induction-heating coils arranged at the same distance with that of the locally cold portions.
摘要:
There is disclosed a method by which a channel-type induction heating apparatus is provided on a tundish, which comprises a steel receiving chamber and a steel discharging chamber separated by a refractory wall, each of which chambers is connected to the ground via molten steel flowing from a ladle, molten steel flowing into a mold, or a refractory, in such a manner that ground circulating current is prevented from being generated. An electromagnetic connection of an induction heating coil and an iron core of a two-leg type or a three-leg type to a loop current circuit in the molten steel is arranged symmetrically, thereby suppressing the generation of the ground circulating current. By thus suppressing the generation of the ground circulating current, it becomes unnecessary to insulate a ground circuit as required in conventional constructions, the maintenance of facilities becomes easier, besides any malfunction of the equipment due to the ground circulating current is totally eliminated.
摘要:
Evaporator crucible for vacuum depositing systems, having a crucible bottom with at least one bottom opening for the introduction of material in rod form for evaporation. At a distance from the bottom opening there is provided at least one metal crucible rim which preferably is provided with a coolant passage. To solve the problem of reducing the heat losses, the crucible rim is provided internally on at least a part of its depth with a lagging comprising ceramic material. This lagging preferably comprises individual ceramic building blocks which are preferably compressed from magnesium oxide.
摘要:
A method is disclosed for melting metals in a channel-type induction furnace which has a double channel-type unit with two inductors, each inductor being located at a separate magnetic core. The method consists of variable magnetic fluxes, which induce electric current in the channels of the channel unit being generated in the cores and a through flow of metal along the channels being created. This flow is provided by reducing the hydrodynamic turbulence at the outlet of the central channel, the phase shift between the magnetic fluxes being maintained at an angle less than 90 electrical degrees. The rate of the metal flow is adjusted by changing the phase shift angle during the course of melting.
摘要:
An inductor associated with an electric furnace for metal casting, and provided, where juxtaposed to the tank of the furnace, with a perimetric cavity sealed by refractory material in tamped condition, acting as a safety packing and filling all the inner room of the inductor body and building an embossed step in the jointing zone between inductor and tank.