A microwave irradiating and heating device including: a reaction furnace containing a sample material to be irradiated with a microwave passed through an opening and to be heated; a microwave irradiating source disposed outside the reaction furnace; a rotated quadric surface mirror reflecting microwave emitted from the microwave irradiating source toward the opening, and disposed above the reaction furnace; a lid for the opening, at least a portion of the lid made from dielectric to transmit microwave reflected on the rotated quadric surface mirror into the reaction furnace; wherein an angle of incidence of the microwave, reflected on the rotated quadric surface mirror and irradiated at the portion of the lid made from the dielectric, is at an angle causing a polarized wave of the microwave to pass through the portion.

Embodiments of the present invention include a heating method and apparatus in which a plurality of heated regions is superimposed in order to improve energy density control.

Provided is a hot stamping method for manufacturing high strength vehicle body parts. The hot stamping method includes: high frequency induction heating a blank in a first heating furnace while transferring the blank; heating the heated blank to an austenitization temperature or more of a corresponding blank while transferring the heated blank from the first heating furnace to a second heating furnace; and drawing the blank heated to the austenitization temperature or more in the second heating furnace to form and cool the blank by using a press forming apparatus. According to the hot stamping method, it is possible to achieve excellent productivity and reduce energy.

An arrangement for heat transfer to a melt in a tundish in a continuous casting process, wherein the tundish includes at least one outlet and an inlet, the arrangement including a heating chamber, a plasma heating apparatus including a plasma torch positioned inside the heating chamber, wherein the plasma heating apparatus is mounted on an arm and arranged to operate through a hole in the heating chamber with a distance to the melt and an electromagnetic stirrer placed outside of the heating chamber and arranged to electromagnetically stir the melt. The heating chamber further includes a pair of weirs installed at an upper part of the heating chamber and a pair of dams installed at a lower part of the heating chamber and the electromagnetic stirrer is arranged to electromagnetically stir the melt in a region of the heating chamber, wherein the region is enclosed by the weirs and dams.

In a heating furnace system for hot stamping, a first heating furnace has a plurality of pairs of upper and lower rolls arranged in a lengthwise direction thereof in order to transfer a steel plate, and high-frequency coils alternately arranged with the pairs of upper and lower rolls in the lengthwise direction thereof. A second heating furnace continuously transfers the steel plate from the first heating furnace during heating the steel plate at temperature of A.sub.c3 or more, and has a plurality of transfer rollers arranged in a lengthwise direction thereof. The second heating furnace includes an electric furnace or a gas furnace. This heating furnace system can reduce space required for facilities by 50% or more compared to the related art.

A blank heating device having a heating furnace is provided and includes a plurality of heating members that heat a blank and a support fixture disposed within the heating furnace to support the blank. Further a transporting component is disposed beneath the support fixture and integrally displaces the support fixture and the blank to increase heating density of the blank. Consequently, a divisional heating occurs based on a size of the blank, which is a material for hot stamping, to improve heating density of the blank. Accordingly, marketability of a material is improved and a preheating time and heat loss is minimized. As a result, work convenience is improved and a consumption amount of energy is reduced.

A microwave reduction furnace including a reaction furnace provided with a refractory chamber of silica or silicon carbide for storing a material therein, a supply section for supplying the material into the refractory chamber, the material being a mixture of a silica powder and a graphite powder or a mixture of a silica powder, a silicon carbide powder and a graphite powder, a discharge section for discharging molten silicon, obtained through reduction, out of the chamber, and a microwave oscillator for outputting microwave toward the refractory chamber in the reaction furnace with a degree of directionality by virtue of a helical antenna or a waveguide.

The present invention relates generally to a ladle metallurgy furnace having an improved roof structure. The improved roof may comprise an internal surface structure having a substantially smooth exterior surface, an external surface structure spaced apart from the internal surface structure, a plurality of channels that are defined intermediate the internal and external surface structures, a supply port in fluid communication with at least one channel through the second surface structure and in further fluid communication with a supply line, and a return port in fluid communication with at least one channel through the external surface structure and in further fluid communication with a return line.

A radiant heat tube (5) comprises a tube body having a center section (6) and at least one recirculating section (7, 8) arranged next to the center section, said recirculating section forming a loop (9, 10) with said center section. A pivot joint bearing (23) is arranged on one end (12) of the radiant heat tube, while a sliding bearing (15) is arranged on the other end (11) of the radiant heat tube, said sliding bearing (15) being arranged opposite said pivot joint bearing (23). A burner (14) is disposed to heat the radiant heat tube (5).

Embodiments of the present disclosure generally relate to apparatus and methods for semiconductor processing, more particularly, to a thermal process chamber. In one or more embodiments, a process chamber comprises a first window, a second window, a substrate support disposed between the first window and the second window, and a motorized rotatable radiant spot heating source disposed over the first window and configured to provide radiant energy through the first window.