37results about "Melt circulation arrangements" patented technology

Apparatus and method are provided for electric induction heating and/or stirring of a molten electrically conductive composition in a containment vessel with the apparatus being removably insertable in the molten composition. An induction coil embedded in refractory or a coating is submerged in the composition and used to heat and/or stir the molten composition either externally or internally to the refractory or coating.

Apparatus and method are provided for electric induction heating and melting of a transition material that is non-electrically conductive in the solid state and electrically conductive in the non-solid state in an electric induction heating and melting process wherein solid or semi-solid charge is periodically added to a heel of molten transition material initially placed in a refractory crucible. Induction power is sequentially supplied to a plurality of coils surrounding the exterior height of the crucible at high power level and high frequency with in-phase voltage until a crucible batch of transition material is in the crucible when the induction power is reduced in power level and frequency with voltage phase shifting to the induction coils along the height of the crucible to induce a unidirectional electromagnetic stir of the crucible batch of material.

Provided are an agitation device, a melting apparatus, and a melting method which achieve good melting efficiency without contaminating molten metal. The agitation device is provided with a traveling magnetic field generating unit which is disposed outside a charging tank for storing molten metal and generates, inside the charging tank, a magnetic field that travels downward along the rear sidewall of the charging tank, whereby a flow of the molten metal that rotates longitudinally about an axis approximately parallel to the surface of the molten metal is produced in the molten metal. By charging aluminum cutting chips into the molten metal in which the flow is produced, the aluminum cutting chips move with the flow of the molten metal, get into the molten metal roughly in the position where a downward flow of the molten metal is produced, and are immersed in the molten metal, and thus the melting of the aluminum cutting chips is accelerated.

An agitator for applying an alternating field to a melting furnace main body in order to melt a row material to form a melt includes a plurality of magnets, which are arranged so that magnetic lines of force emitted from one of the magnets pass through the melt in the melting furnace main body and return to another magnet, the magnets being fixed to an inclined surface which is inclined by an angle with respect to a horizontal surface, and being rotatable around an axis substantially perpendicular to the inclined surface.

An asphalt processing system is formed from a heating chamber, a transfer system and an induction heating system. A plurality of paddles, conveyor flights, or conveyor belts having a U-shaped blade move the asphalt through the system while concurrently mixing the material to ensure consistent temperatures through the asphalt cement. The asphalt is heating using one or more induction heating systems to quickly heat the asphalt to between 300° F. and 350° F. The system can include a convection system designed to collect air from the heating chamber, further heat it, and recirculate the air to enhance the asphalt heating. A water condenser can be employed to remove moisture during air recirculation, reducing moisture content in the asphalt cement. The asphalt cement is optionally then modified by addition of one or more rejuvenation oils. This system is particularly useful for recycled asphalt pavement, but can be used for all asphalt products.

A radiation heating device includes: a planar heat generation layer; a heat generation portion that is provided in the heat generation layer and that generates heat by energization; a plurality of heat radiation portions that are disposed in the heat generation layer and that radiate heat transferred from the heat generation portion; a low heat conduction portion that is provided around each of the heat radiation portions and that has a lower heat conductivity than the heat radiation portions; and a contact detection unit that detects contact of an object with the heat generation layer. The radiation heating device further includes an energization amount decrease unit that decreases an energization amount of the heat generation portion when the contact detection unit detects the contact of the object with the heat generation layer.

The present invention relates to a system and a method for determining/predicting a tapping time for a metal melt in an electric arc furnace (EAF), wherein at least one electrode is provided for melting the metal melt until it reach a target tapping temperature, wherein the EAF further comprises a slag and smoke layer on the surface of the metal melt, wherein an electromagnetic stirrer is provided for stirring the metal melt. The method comprises supplying a power to the electrode in order to melt a scrap to a metal melt (S10), electromagnetic stirring the metal melt in the EAF (S20), blowing away the slag and smoke from the surface of the metal melt (S30), non- contactingly measuring a temperature of the metal melt (S40), receiving the measured temperature (S50), calculating a temperature profile based on the received temperature (S60), estimating/predicting a tapping temperature at a time point based on the calculated temperature profile (S70), and determining a tapping time based on the estimated temperature, the target tapping temperature and the power supplied to the electrode (S80).

The invention discloses a track deicing vehicle which is suitable for being erected on a metal track. The track deicing vehicle comprises a vehicle body and a deicing mechanism arranged on the vehicle body, wherein the deicing mechanism comprises an electromagnetic heating ice melting device which is used for heating the track through electromagnetic heating so as to melt ice; a mechanical ice crushing device which is used for crushing the ice layer heated by the electromagnetic heating ice melting device; and a drying device which is used for drying accumulated water on the surface of the track; the electromagnetic heating ice melting device, the mechanical ice crushing device and the drying device are sequentially arranged in the advancing direction of the track deicing vehicle and located below the vehicle body. According to the track deicing vehicle, the electromagnetic heating ice melting device utilizes the electromagnetic heating principle to heat the track, the bottom of an ice layer in contact with the track surface is melted, a water film is formed at the contact position of the bottom of the ice layer and the track surface, the binding force of the ice layer and the track surface is damaged, and the ice layer is separated from the track surface; and the mechanical ice crushing device is used for rolling to crush the ice layer, so mechanical impact on the track surface is avoided, and the track is not damaged.

A non-magnetic wireless heating module is described. The module consists of a, preferably embossed, surface or plane and a dielectric surface or plane. The surface or plane is made of an inductive non-magnetic metal alloy that contains a first amagnetic metal or a first non-magnetic mixture of metals in a percentage between 85% and 99.99% by weight to the total weight and contains a second ferromagnetic or ferrimagnetic metal or a second ferromagnetic or ferrimagnetic mixture of metals in a percentage between 0.01% and 15% by weight to the total weight. The wireless amagnetic heating module is inserted into a chamber (for example a pipe or a portion of a pipe, a cubic container, a cistern . . . ) for the passage or storage of fluids, liquids, gases or solids; when the wireless amagnetic heating module is subjected to a variable electromagnetic field, it heats up, allowing heating, drying, passage of phase, . . . of the material in contact with it and contained in the chamber.

A method of restoring the electrical efficiency of channel and pressure pour furnaces includes plunging a fluxing material with a specially designed plunging lance. The plunging lance chamber containing the fluxing material is 24 to 32 inches in length, 3 inches in diameter and has a capacity to hold 5 to 7.5 pounds of flux briquettes. The plunging chamber has holes drilled along the length of the body. The fluxing material contains by weight from 8.0 to 28.7% CaCO₃ (calcium carbonate or limestone), from 0 to 18.5% MgCO₃ (magnesium carbonate), from 3.6 to 18.0% Al₂O₃ (alumina) from 1.4 to 7.1% SiO₂ (silica), in the form of a complex aluminosilicate, and from 19.4 to 46.4% Na₂O (sodium oxide), in the form of soda ash (sodium carbonate). The total level of sodium ranges from 23 to 26% and up to 10% sodium fluoride or sodium chloride may be substituted for soda ash.

An inserted intermediate frequency fused salt heater comprises a tubular heating tube fixed seat, a plurality of heating tubes welded and fixed at the lower portion of the tubular heating tube fixed seat, a fixed seat flange welded at the upper portion of the tubular heating tube fixed seat, leads arranged in heating tubes, a medium frequency transformer and a medium-frequency power supply, wherein the leads are tightly welded with the bottom ends of the heating tubes, the leads are connected with secondary coils of the medium frequency transformer, the primary coil of the medium frequency transformer is connected with the medium-frequency power supply, and the secondary coil of the medium frequency transformer inducts a frequency high current in a low voltage; the leads, the heating tubes, the heating tube fixed seat and the secondary common end of the medium frequency transformer are connected to form a loop, each lead is connected with the secondary coil end, eddy is formed on the tube bodies of the heating tubes to perform rapid heating, and the intermediate frequency intermediate frequency is employed to allow the heating tube to directly heat in the fused salt liquid. The inserted intermediate frequency fused salt heater is high in heating efficiency, has no potential safety hazards of damaging people caused by electric leakage, and is long in service life, simple in structure, low in cost, convenient to maintain and very safe and reliable in usage.