A furnace has a melting chamber with a periphery defined by a surrounding wall structure. The furnace is provided with a purge system configured to direct inert gas to flow downward in the melting chamber in the configuration of a curtain that adjoins the wall structure and reaches only partially around the periphery of the melting chamber.

Ovens, discharge nozzle plates for distribution of gas through an oven, and methods to operate an oven are disclosed. Example ovens include a heating system to heat gas, a substrate heating volume, and a plenum comprising a side wall having a plurality of passages formed therein, the plenum configured to direct heated gas into the substrate heating volume from the plurality of passages, each of the plurality of passages formed in the plenum having a respective tapered cross-sectional shape.

Injection device (56) for discharging a gas (54), in particular a process gas (54), onto a material (12), in particular onto a battery cathode material (14) that is to be calcined, having at least one inlet (58) through which the gas (54) can be supplied to the injection device (56), and at least one outlet (60) through which the gas (54) can be discharged from the injection device (56), the inlet and outlet being connected to one another by a flow path (62) for the gas (54). According to the invention, the flow path (62) has a heat exchanger (64) with a heat exchanger housing (68) which is accessible from the outside for an ambient atmosphere (66) and in which a duct arrangement (70) is integrated. The duct arrangement (70) comprises a first flow duct (72.1) and a second flow duct (72.2) between which there is formed a redirection region (74.1) such that the gas (54) can flow through the first and second flow duct (72.1, 72.2) in different main flow directions. The invention further relates to a process gas system (52) for supplying a gas (54) and to a device (10) and a method for the thermal or thermo-chemical treatment of material.

The present invention discloses a cylindrical heating apparatus for aluminum foil annealing furnaces. During use, a fan sends air through an air inlet into the cylindrical shell, where the air flows circumferentially along the inner wall of the cylindrical shell, a guide plate directs a portion of the air to middle areas of the cylindrical shell to enhance the heat convection exchange between heating cores located in the middle areas of the cylindrical shell and the air, thereby improving the heating efficiency of the heating cores.

A method for manufacturing a carbon fiber bundle includes a stabilization process of subjecting an acrylic fiber bundle to a heat treatment within a range of 200 C. to 300 C. in an oxidizing atmosphere; a pre-carbonization process of performing a heat treatment within a range of 300 C. to 1,000 C. using a heat treatment furnace having at least one inert gas supply port on each of an incoming side and an outgoing side of the fiber bundle and at least one exhaust port between the incoming-side and outgoing-side inert gas supply ports, the heat treatment being performed with a temperature of an inert gas supplied being higher on the outgoing side than on the incoming side; and a carbonization process of performing a heat treatment at a temperature of 1,000 C. to 2,000 C. in an inert gas atmosphere, in which from a position at which an atmospheric temperature in the heat treatment furnace is 300 C., the position being closest to the outgoing side in a machine length direction, up to the inert gas supply port on the incoming side, a flow of an inert atmosphere within the heat treatment furnace in the pre-carbonization process consists only of a flow in a parallel flow direction with respect to a travel direction of the fiber bundle in the machine length direction. Provided is a method for manufacturing a carbon fiber bundle by which manufacturing can be performed continuously for a long time by preventing entry into a temperature zone causing deposition of a gasified decomposition product, such as tar, that is generated at the time of the pre-carbonization treatment in manufacturing of carbon fibers and that stays within the heat treatment furnace.

The injector(s) have a nozzle body with an inner gas channel for guiding reducing gas from an inlet port to injection holes(s). The nozzle body is mounted trough an aperture in the blast furnace wall at a shaft level of the blast furnace and includes a peripheral mounting portion configured for connecting the injector in a gas tight manner to the aperture. The inlet port is in fluidic connection with a reducing gas distribution pipe by means of an injector stock including a feeding pipe connected to the reducing gas distribution pipe, an elbow connected to the feeding pipe and an injector pipe connected to the elbow and being flange mounted in a gas tight manner to the inlet port. The injector pipe and/or an outlet of the elbow have at least one cardan compensation joint.

An airflow orifice adjusting device of a package thermal-shrinking oven includes at least one airflow orifice board mounted to an inside surface of a hot airflow box of the package thermal-shrinking oven and formed with series of airflow orifices, at least one track board mounted to an outside of the hot airflow box and formed with a plurality of track holes, a plurality of adjusting levers, and a plurality of airflow-blocking adjusting plates mounted to the airflow orifice board and each formed with a plurality of adjusting orifices. Each of the airflow orifices of the airflow orifice board discharges a hot airflow. The adjusting levers each have two ends that are respectively formed as a connecting portion and an operating portion. The connecting portion extends through the track holes of the track board to connect to one end of the airflow-blocking adjusting plate, so that a leftward or rightward horizontal moving operation of the operating portion of the adjusting levers causes the airflow-blocking adjusting plate to correspondingly perform a reversely directed horizontal movement in a rightward or leftward direction. The adjusting orifices of the airflow-blocking adjusting plates respectively correspond to the airflow orifices of the airflow orifice board, so that each of the adjusting orifices may completely or partially match with or completely un-match with a corresponding one of the airflow orifices of the airflow orifice board to adjust a discharging flowrate of the hot airflow and discharging of the hot airflow or not.