Abstract: A vacuum die casting method may include: coupling a fixed die and a movable die to each other; closing a molten metal pouring hole formed in a sleeve using an injection plunger operated in the sleeve, which is formed on a lower side of the fixed die or the movable die; performing vacuum decompression in a cavity formed between the fixed die and the movable die using a vacuum decompression device connected to chill vent blocks provided on upper portions of the fixed die and the movable die; supplying oxygen in the cavity using an oxygen supply device connected to the chill vent blocks after completing the step of performing vacuum decompression; and supplying a molten metal to the cavity through the molten metal pouring hole.

Abstract: Provided is a selective catalytic reduction (SCR) catalyst containing a carbon material loaded with vanadium and tungsten and a method of preparing the same, and relates to a method of loading vanadium and tungsten on a carbon material that exhibits excellent abrasion resistance and excellent strength and can be easily prepared.

Abstract: Provided is a selective catalytic reduction (SCR) catalyst containing a carbon material loaded with vanadium and tungsten and a method of preparing the same, and relates to a method of loading vanadium and tungsten on a carbon material that exhibits excellent abrasion resistance and excellent strength and can be easily prepared.

Abstract: An apparatus for recycling metal scraps includes a mold having an inner conversion cavity for converting the metal scraps, an inlet disposed in one longitudinal end thereof, and an outlet disposed in the other longitudinal ends thereof, the inlet and the outlet communicating with the cavity; a gate movably mounted near the outlet of the mold so as to open and close the outlet of the mold as the gate moves; a gate actuator moving the gate to an opening or closing position; a scrap feeder supplying the metal scraps into the cavity of the mold, a conversion plunger intruded into the cavity via the inlet of the mold and compacting the metal scraps to form a solid compact having a shape corresponding to the cavity; and a press actuator reciprocating the conversion plunger between inside and outside of the mold so as to provide a conversion pressure.

Abstract: A high-heat-retention ladle for carrying molten aluminum includes a ladle body defining therein a storage space, which contains molten aluminum therein, the ladle body including a molten metal inlet and a molten metal outlet, which allow the storage space to communicate with outside, a cover opening and closing the inlet of the ladle body, and a stopper opening and closing the outlet of the ladle body. Each of the ladle body and the cover has an outer shell, which defines a contour thereof, and a multi-layer insulation structure inside the outer shell. The multi-layer insulation structure includes two or more refractory layers. The molten aluminum contained inside the storage space has a temperature drop rate of 5° C./min or less. It is possible to carry the molten aluminum for a long time in a heat-insulated state and cast a product by directly pouring the molten aluminum into a mold.

Abstract: An integrated management system for molten aluminum includes a melting process management system, which melts aluminum raw material, taps molten aluminum, and extracts information related to the molten aluminum; a recording medium attached to a high-heat-retention ladle, which is for carrying the molten aluminum, wherein the extracted information is recorded into the recording medium; a portable terminal, which reads the information from the recording medium; and a casting process management system, which manages delivery confirmation and inspection by receiving the information from the transported high-heat-retention ladle via the portable terminal and performs a casting process based on the information. The integrated management system and method ensures improved and efficient process management based on correct molten aluminum information, thereby reducing management costs and time.

Abstract: An apparatus for recycling metal scraps includes a mold having an inner conversion cavity for converting the metal scraps, an inlet disposed in one longitudinal end thereof, and an outlet disposed in the other longitudinal ends thereof, the inlet and the outlet communicating with the cavity; a gate movably mounted near the outlet of the mold so as to open and close the outlet of the mold as the gate moves; a gate actuator moving the gate to an opening or closing position; a scrap feeder supplying the metal scraps into the cavity of the mold, a conversion plunger intruded into the cavity via the inlet of the mold and compacting the metal scraps to form a solid compact having a shape corresponding to the cavity; and a press actuator reciprocating the conversion plunger between inside and outside of the mold so as to provide a conversion pressure.

Abstract: A high-heat-retention ladle for carrying molten aluminum includes a ladle body defining therein a storage space, which contains molten aluminum therein, the ladle body including a molten metal inlet and a molten metal outlet, which allow the storage space to communicate with outside, a cover opening and closing the inlet of the ladle body, and a stopper opening and closing the outlet of the ladle body. Each of the ladle body and the cover has an outer shell, which defines a contour thereof, and a multi-layer insulation structure inside the outer shell. The multi-layer insulation structure includes two or more refractory layers. The molten aluminum contained inside the storage space has a temperature drop rate of 5° C./min or less. It is possible to carry the molten aluminum for a long time in a heat-insulated state and cast a product by directly pouring the molten aluminum into a mold.

Abstract: An integrated management system for molten aluminum includes a melting process management system, which melts aluminum raw material, taps molten aluminum, and extracts information related to the molten aluminum; a recording medium attached to a high-heat-retention ladle, which is for carrying the molten aluminum, wherein the extracted information is recorded into the recording medium; a portable terminal, which reads the information from the recording medium; and a casting process management system, which manages delivery confirmation and inspection by receiving the information from the transported high-heat-retention ladle via the portable terminal and performs a casting process based on the information. The integrated management system and method ensures improved and efficient process management based on correct molten aluminum information, thereby reducing management costs and time.