A heat treatment apparatus used in a process of recovering lithium carbonate from a waste cathode material and a lithium carbonate recovery apparatus using the same are provided. The heat treatment apparatus includes a heat treatment furnace having an inlet through which an object to be treated is input and an outlet through which the heat-treated object is discharged, a support section rotatably supporting the heat treatment furnace, a burner provided in the heat treatment furnace to supply combustion gas to the heat treatment furnace, and an exhaust gas re-supply device re-supplying a portion of the combustion gas discharged from the heat treatment furnace to the heat treatment furnace, wherein the heat treatment furnace is divided into a first region in which the inlet is disposed, a second region connected to the first region, and a third region connected to the second region and in which the burner is disposed.

A heat treatment apparatus used in a process of recovering lithium carbonate from a waste cathode material and a lithium carbonate recovery apparatus using the same are provided. The heat treatment apparatus includes a heat treatment furnace having an inlet through which an object to be treated is input and an outlet through which the heat-treated object is discharged, a support section rotatably supporting the heat treatment furnace, a burner provided in the heat treatment furnace to supply combustion gas to the heat treatment furnace, and an exhaust gas re-supply device re-supplying a portion of the combustion gas discharged from the heat treatment furnace to the heat treatment furnace, wherein the heat treatment furnace is divided into a first region in which the inlet is disposed, a second region connected to the first region, and a third region connected to the second region and in which the burner is disposed.

A method to produce metallic beryllium spheres with high sphericity in a large quantity efficiently at a low cost is provided herein. The method of continuously producing metal beryllium spheres comprises the steps of: collecting granulated beryllium spheres produced by charging beryllium powder into a rotary kiln; classifying the collected beryllium spheres by particle size with an automatic sieve; and crushing particles of beryllium spheres of non-target diameters and mixing them with the raw material beryllium powder for reuse. The rotary kiln has a core tube the inner surface of which is coated with beryllium oxide by sintering the slurry coating of beryllium hydroxide applied after alkaline silica treatment.

A method to produce metallic beryllium spheres with high sphericity in a large quantity efficiently at a low cost is provided herein. The method of continuously producing metal beryllium spheres comprises the steps of: collecting granulated beryllium spheres produced by charging beryllium powder into a rotary kiln; classifying the collected beryllium spheres by particle size with an automatic sieve; and crushing particles of beryllium spheres of non-target diameters and mixing them with the raw material beryllium powder for reuse. The rotary kiln has a core tube the inner surface of which is coated with beryllium oxide by sintering the slurry coating of beryllium hydroxide applied after alkaline silica treatment.

A multi-opening oven assembly for simultaneously heating a plurality of blanks, for example aluminum blanks, before forming the heated blanks in a production line is provided. The oven assembly includes vertically aligned shelves to present a plurality of chambers for heating the blanks. A table including an entry side platform and an exit side platform moves vertically along the oven assembly. A rail system extends along the platforms and the shelves to convey the blanks in and out of the chambers. Once one set of heated blanks is removed from a first chamber, the table moves vertically to a second chamber and is ready to receive the next set of heated blanks. A continuous supply of heated blanks is provided for high throughput. The oven assembly is preferably disposed in a press adjacent a forming station of an existing production line and thus, no additional floor space is required.

A multi-opening oven assembly for simultaneously heating a plurality of blanks, for example aluminum blanks, before forming the heated blanks in a production line is provided. The oven assembly includes vertically aligned shelves to present a plurality of chambers for heating the blanks. A table including an entry side platform and an exit side platform moves vertically along the oven assembly. A rail system extends along the platforms and the shelves to convey the blanks in and out of the chambers. Once one set of heated blanks is removed from a first chamber, the table moves vertically to a second chamber and is ready to receive the next set of heated blanks. A continuous supply of heated blanks is provided for high throughput. The oven assembly is preferably disposed in a press adjacent a forming station of an existing production line and thus, no additional floor space is required.

A device for forming a molten solidified body by receiving a molten material discharged from a vitrification device or the like on a lower mold, and a method for forming a molten solidified body and, particularly, to a mold supporting device for forming a uniform molten solidified body such that a height deviation on a mold of a dropping molten material is reduced by providing movement to the mold, and a method for forming an uniform molten solidified body. The mold supporting device and the method for forming a uniform molten solidified body to prevent the formation of a high columnar shape at a specific position by the molten effluent not being uniformly contained in the mold due to the high viscosity thereof, thereby forming a uniform solidified body.

A device for forming a molten solidified body by receiving a molten material discharged from a vitrification device or the like on a lower mold, and a method for forming a molten solidified body and, particularly, to a mold supporting device for forming a uniform molten solidified body such that a height deviation on a mold of a dropping molten material is reduced by providing movement to the mold, and a method for forming an uniform molten solidified body. The mold supporting device and the method for forming a uniform molten solidified body to prevent the formation of a high columnar shape at a specific position by the molten effluent not being uniformly contained in the mold due to the high viscosity thereof, thereby forming a uniform solidified body.

The invention relates to a method for sealing a reduction assembly, wherein the reduction assembly has a product discharge device, wherein the product discharge device is supplied with sealing gas and wherein at least one compressor is provided for delivering prepared sealing gas to the product discharge device, wherein according to the invention, at least one nitrogen generator is provided for producing pure sealing gas, and wherein the sealing gas for supplying to the product discharge device is composed of pure sealing gas from the at least one nitrogen generator or composed of pure sealing gas from the at least one nitrogen generator and of prepared sealing gas from the at least one compressor. The invention also relates to a device with which the method according to the invention is carried out.

The invention relates to a method for sealing a reduction assembly, wherein the reduction assembly has a product discharge device, wherein the product discharge device is supplied with sealing gas and wherein at least one compressor is provided for delivering prepared sealing gas to the product discharge device, wherein according to the invention, at least one nitrogen generator is provided for producing pure sealing gas, and wherein the sealing gas for supplying to the product discharge device is composed of pure sealing gas from the at least one nitrogen generator or composed of pure sealing gas from the at least one nitrogen generator and of prepared sealing gas from the at least one compressor. The invention also relates to a device with which the method according to the invention is carried out.