A runner apparatus for preventing thermal loss of molten materials, wherein the runner apparatus guides the molten materials discharged from a furnace to a casting mold, including: an insulation unit providing a passage for a flow of the molten materials discharged from the furnace and lowering a thermal loss of the molten materials; a dam unit confining the insulation unit in a predetermined space thus preventing a leak and adjusting the flow of the molten materials; an outside unit forming an exterior wall covering the insulation unit; and a spread unit, disposed under the insulation unit, spreading the molten materials dropping from the dam unit and transferring the same to the casting mold.

An apparatus for countergravity casting a metallic material, has: a crucible for holding melted metallic material; a casting chamber for containing a mold; a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber; and a gas source coupled to a headspace of the melting vessel to allow the gas source to pressurize the headspace to establish a pressure differential to force the melted metallic material upwardly through the fill tube into the mold. Extraneous sulfur is prevented from entering the molten metal from the surrounding environment.

A die casting method includes stirring an aluminum alloy liquid in a stirrer under an airtight vacuum condition. The stirrer includes an electromagnetic inductor and a stirring rod. The aluminum alloy liquid is simultaneously subjected to an electromagnetic stirring in a direction of a magnetic field generated by the electromagnetic inductor and a mechanical stirring under a rotation action of the stirring rod. The aluminum alloy liquid is stirred for 20-80 minutes until the aluminum alloy liquid becomes semisolid to obtain a semisolid aluminum alloy slurry. The method further includes injecting the semisolid aluminum alloy slurry into a filter die to perform die casting molding at an injection speed of 1.5-2.5 m/s, an injection specific pressure of 30-80 MPa, a pressurization pressure of 60-80 MPa, and a temperature of the filter die of 250-400° C., and maintaining pressure for 7-30 seconds to obtain the filtering cavity.

Systems, methods, and filter media for filtering molten aluminum or aluminum alloy are provided. The filter media includes a plurality of porous reticulated filter media pieces composed of at least one type of bonded particle. Each of the plurality of filter media pieces have a porosity between 5 pores per inch (PP) and 90 pores per inch and are between ¾ inches and 6 inches across and between ½ inches and 2 inches thick. The filter media pieces provide a plurality of external tortuous paths between the filter media pieces and a plurality of internal tortuous paths within individual ones of the filter media pieces for the molten aluminum or aluminum alloy to flow through when the filter media pieces are arranged in a filtration vessel. The filter media may be used in an inline deep bed aluminum filtration process to replace existing media.

An apparatus for countergravity casting a metallic has: a crucible for holding melted metallic material; a casting chamber for containing a mold; a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber; and a gas source coupled to a headspace of the melting vessel to allow the gas source to pressurize said headspace to establish a pressure differential to force the melted metallic material upwardly through said fill tube into the mold. Added sulfur-gettering particles subsequently filtered or sulfur-gettering material removes sulfur from the melted metallic material.

Disclosed is a flow-controllable tundish structure capable of filtering inclusions in molten steel. The tundish structure comprises a tundish (1), the tundish being divided into three separated cavities which comprise an impact zone cavity (1a) in the middle and pouring zone cavities (1b) at two sides thereof. A long nozzle (2) for pouring is vertically arranged in the center of the impact zone cavity, and molten steel flows down out of the long nozzle for pouring and is injected into the impact zone cavity; and a turbulence suppressor (3) directly facing the long nozzle for pouring is arranged on the cavity bottom under the long nozzle for pouring, and the molten steel flowing down out of the long nozzle for pouring impacts on the turbulence suppressor and is then buffered and mixed. Filter assemblies (A) are respectively arranged between the impact zone cavity and the pouring zone cavities at the two sides, and the buffered and mixed molten steel in the impact zone cavity is filtered by the filter assemblies and is then delivered into the pouring zone cavities at the two sides. Discharge ports (4) are respectively arranged in the bottom of the pouring zone cavities, and the molten steel filtered by the filter assemblies flows into the pouring zone cavities and then flows out from the discharge ports. The flow-controllable tundish structure has the advantages of a simple structure, easy building and lower cost, and has a good liquid steel purification effect.

Apparatus and method for filtering molten metal including a container with a removable lid to keep the container sealed during operation, the container having an inlet chamber having an inlet opening receiving metal from a metal supply launder and outlet chamber with outlet opening connected to a launder segment. The container having a partition wall between the inlet chamber and outlet chamber and a ceramic foam filter mounted in the outlet chamber. The inlet chamber and outlet chamber being provided within the container and split by the partition wall. The container being connected in parallel with the metal supply launder via stubs. The launder being provided with a dam or valve device downstream the outlet of the container and another dam or valve device between the said launder stubs. Inside the container there is further arranged a second outlet chamber with a filter.

A spiral-orifice ceramic filter for metal casting, including spiral channels and two drain openings, where the spiral channels are distributed in a ceramic substrate in a staggered manner. By adoption of the spiral channel structure, molten metal may rotate to generate a centrifugal force while flowing forwards so as to promote separation of inclusions. The spiral-orifice ceramic filter for metal casting includes the following components: 90-95 wt % of MgO, 4-8 wt % of SiO.sub.2 and 2-4 wt % of ZrO.sub.2. Therefore, the spiral-orifice ceramic filter for metal casting has high strength under normal temperature and optional thermal impact resistance under high temperature, and may tolerate the impact of molten metal at 1700° C. or higher without break. The ceramic substrate and the spiral channel are superficially coated with one layer of functional oxide prepared from CaO.2Al.sub.2O.sub.3, CaO.6Al.sub.2O.sub.3, Al.sub.2O.sub.3, TiO.sub.2, or Re.sub.2O.sub.3.

The present invention relates to the field of alloy-smelting facilities, and provides an aluminum-based ultra-thin launder. The launder has a body with a wall thickness of 12 mm to 25 mm. The body has a segmented structure, including a part of alloy in, a first launder, a second launder and a part of alloy out that are connected in sequence. The body of the launder provided in the present invention is lighter and thinner. The cost of production and use is reduced due to the significantly-decreased wall thickness and weight. The connection mode for components of the body is changed, which is beneficial to the replacement, and fundamentally lowers the risk of a repair material contaminating melted alloy.

Casting filter, in particular for filtering and/or purifying a metal melt, having a cell structure for passing through a metal melt and having a supporting structure for reinforcing the cell structure, the cell structure and/or the supporting structure being produced at least in sections from a ceramic material, the cell structure being formed by a plurality of cells which are delimited from one another by cell walls, wherein at least one of the cells has a constant cross-sectional shape along a flow orientation, wherein at least one of the cell walls has a wall thickness of less than 1 mm, and wherein the supporting structure is formed by at least one supporting wall which extends at least in sections between adjacent cells and whose wall thickness is greater, at least in sections, than the wall thickness of a cell wall.