Abstract: The invention relates to a lateral basin for electromagnetic pumping in a foundry and in particular in a light metal foundry. The pump comprises a magnetic circuit (207) which is locally saturated and which is embedded in the ceramic of the said basin. The electrical excitation winding of the magnetic circuit (208) is located outside the basin, and the circuit is disposed to create a horizontal leakage field through an active portion (204) of a liquid metal turn which, together with electrical current induced in said active portion (204), sets up a magnetic pumping force which is upwardly directed and which urges liquid metal into a duct (206) leading away from the furnace to liquid metal receiving means. The liquid from the furnace (202) supplies the active portion of the liquid metal turn (204) via a passage (205) of height limited by a partition (209). The electromagnetic pumping basin enables almost any casting requirements in a foundry to be supplied with liquid metal.

Abstract: An electromagnetic conduction pump for liquid metal, including a part of refractory material; two magnetic circuits each including a horizontal arm embedded in the refractory material, the first having a gap and the other being closed; a rising channel arranged in the refractory material for pumping of the liquid metal passing through the gap in the first magnetic circuit and a closed turn of liquid metal communicating with the rising pumping channel at the place where it passes through the gap. The turn consists of a channel of inverted-U shape the legs of which dip into the bath of metal, one of the legs consisting of a section of the rising channel and the other leg partially interlacing the horizontal arm of the second magnetic circuit.

Abstract: The invention relates to a conduction pump for liquid metal.This pump comprises a magnetic circuit for creating a magnetic field in the stream of liquid metal circulating in a pipe, and a turn, filled with liquid metal, for supplying an electric current perpendicular to the magnetic field in the stream of liquid metal. The turn is arranged at the level of the gap zone of the magnetic circuit, perpendicular to the field in this gap, and at least partially surrounds the magnetic circuit so that the electric current is generated in the turn by the circuit. The turn is at least partially formed by the circulation pipe itself.The invention is applied in particular to the conveying of liquid aluminium by pumping.

Abstract: In the low pressure casting of a metal in a mould supplied from below by an electromagnetic pump, the durations of the various stages of the moulding cycle are determined in dependence on the temperature of the mould, the temperature of the metal in the mould and the temperature of the metal in the furnace to obtain optimum casting conditions despite variations in these temperatures.

Abstract: A spigot for connecting the inlet of a low pressure casting mould to a pipeline connected to an electromagnetic pump for supplying the mould with liquid metal, the spigot being adapted to be clamped against the mould inlet, comprises a supply conduit surrounded by thermally insulating means within an external metal jacket, said conduit including a sleeve at that end to be connected to the mould inlet which is removable from the spigot in the event that metal solidifies in the sleeve, the sleeve being made of thermally insulating refractory material and being held in place, in use, by clamping the spigot to the mould inlet.

Abstract: The present invention concerns insulating ceramic substances, passive with respect to corrosive molten metals such as aluminium or steel, having a controlled porosity, withstanding without cracking repeated thermal shocks. Such ceramics are obtained by sintering without charge at a low temperature after addition of a fluoride.

Abstract: Refractory products having remarkable resistance to thermal shocks, comprising 60% of the total weight of ceramic fibres, dispersed in 40% of the total weight of cement, obtained by slow heating up to 800.degree. C after the setting and the stripping. A chemical bond is set up in those conditions between the fibre and the calcium aluminate of the cement. Application to the manufacturing of parts remaining in contact with reactive molten metals.

Abstract: Apparatus comprising a crucible, a level-determining tank, a vacuum pump, an injection cylinder, a mould and appropriate interconnecting pipes. Molten metal is kept under vacuum throughout except that in a modification a gas may be deliberately introduced into the mould to provide a surface treatment of the casting.

Abstract: A device for adjusting the quantity of molten metal used in pressure casting has a pump pumping molten metal up from a supply container to a pressure chamber and to a level-determining tank having an adjustable overflow. Hydrostatic pressure balances the levels in the level-determining tank and the pressure chamber so that adjusting the overflow also adjusts the level of metal in the pressure chamber.

Abstract: Very porous conductive ceramic substances constituted of diborides and a certain percentage of disilicides of metals in groups IVa, Va, VIa of the periodical classification of elements. Preparing of ceramic substances by sintering of fine powders and of grains of a mixture of diborides and disilicides of metals in groups IVa, Va, VIa in the periodic classification of elements in presence of a fluoride.

Abstract: Molten corrosive metals such as aluminium are treated, especially for purification, by injecting of gases such as chlorine or nitrogen. This gas-treatment plant comprises a gas-treatment device immersed in a part of a furnace containing molten metal; an electromagnetic pump, situated above the gas-treatment device, stirs the mixture of gas and metal by counter-pressure operation and slag is formed in a decanting tank.

Abstract: Compound isotropic ceramic substance having ceramic fibers dispersed in a proportion greater than 20% by weight of the total weight of the final product, having excellent resistance to thermal shocks. The ceramic substance is constituted by ceramic fibers with calcium aluminate fulfilling the function of a hydraulic binding agent. The dispersing of the fibers in the binding agent may be obtained either in contact with a weight of water of the order of the weight of solid ingredients or dry, with water then being incorporated in a subsequent stage of the manufacturing process.

Abstract: Installation in which an immersed electromagnetic pump feeds successively at least two low-pressure casting moulds, the feeding of the second mould being effected during the cooling of the first mould, wherein the moulds are arranged on either side of the pump and of the vertical line of the maintaining ladle and at a level higher than the latter. Moreover, the contact and interconnection and locking operations of the pipe for feeding molten metal to the mould are simplified and accelerated. Numerous applications to the casting of aluminum parts, cast metal parts or steel parts.

Abstract: Industrial treating of corrosive molten metals by a gas within molten liquid duct of a treating electromagnetic pump comprising an installation in which the input of said treating pump is connected to an ascending pump immersed in said molten metal and the output of said treating pump is connected to a degassing tank provided with a spout pouring out the treated molten metal.