Abstract: Filter medium in the form of a stable porous body of granules of spherical form bonded together by a different phase or by sintering. Preferably hollow spherical granules of corundum are manufactured into filter media in plate form. The filter media are employed for filtration of molten metal preferably aluminum.

Abstract: A collar for protecting the iron spade of an anode rod for a carbon block that serves as an anode in the electrolytic production of aluminum comprises a plurality of shaped carbon blocks each with two close-fitting, abutting end faces and recesses which jointly correspond in cross-section to that of the anode spade or pin and surround the anode spade or pin projecting out of the anode block; the base areas of the said carbon collar blocks form a plane which is in contact with the carbon anode. The shaped carbon blocks are manufactured out of 60-90 wt % carbonaceous solids and 10-40 wt % bitumen binder. Because of their low pore volume the protective collars exhibit a low absorption capacity for sodium and a favorable combustion behavior during the electrolytic process.

Abstract: An aluminum reduction cell having an outer steel shell, thermal and electrical insulation, and an inner lining comprising at least a floor and sidewalls, the improvement which comprises a gap sealant at least in the region of the transition between the floor and sidewalls, the gap sealant comprises a pourable material characterized by a melting point of greater than 1000.degree. C., a density of greater than 2.7 g/cm.sup.3 and a high degree of resistance to molten electrolyte and molten aluminum.

Abstract: The goods truck features a superstructure which is made up of interconnected longitudinal walls, end walls and floor and is designed to form a self-supporting body which twists relatively easily. The roof features at least one longitudinal part which is attached to one longitudinal wall and, with respect to the end walls and the other longitudinal wall, exhibits freedom of movement in the longitudinal direction which accommodates the twisting action. A charging port/charging ports can be provided in the roof. By employing the concept according to the invention the danger of derailment can be reduced, and fatigue crack formation avoided in the region of the roof.

Abstract: The solid, liquid and gaseous waste products which arise during the manufature of carbon electrodes are concentrated.First, the solid electrode waste is mixed with the carbon-rich dusts from crushing operations, and with lime or lime and gypsum (from a wet scrubbing operation). By means of grinding and screening the mixture is converted to a suitable range of fine particulate sizes, then fed continuously as adsorbent material through a dry scrubbing unit through which is passed the gaseous waste that also contains fractions of fluid waste. The thus charged adsorbent is combusted together with oily waste in a low temperature fluidized bed boiler. The resultant ash and slag which contain the pollutants as non-hazardous calcium sulfate or calcium fluoride are transported to a dumping site.

Abstract: A reduction pot for the production of aluminum by fused salt electrolysis comprises an outer steel shell, thermal insulation and an inner lining essentially of carbon with iron cathode bars embedded in it. The floor insulation comprises at least in part of a mechanically compacted layer of a granular material of ground insulation layers and having essentially a particle size that varies between 0.01 and 8 mm. The sidewalls of the reduction pot contain, up to at most 70% of the height (h) of the cathode bar elements, mechanically compacted granular material from ground insulation layers. Above that the thermally and electrically insulated steel shell is lined with sidewall bricks, and the gap between the sidewall bricks and the floor elements is closed off with the usual ramming mass.

Abstract: A thin, plastically formable composite laminate features at least one metallic outer layer (14) and a core (10) of thermoplastic plastic. The metallic outer layers (14) exhibit a flat stress-strain curve which is similar to that of the plastic core (10) and is achieved by specific types of aluminum alloys and by specific alloy treatments. The, preferably 1.5-2.5 mm thick, composite laminates are employed for the manufacture of shaped parts in light weight constructions, especially in automobile, equipment and architectural applications.

Abstract: A composite laminate for use in the paneling of walls, ceilings and other surfaces such as furniture and the like comprises a polymeric sheet-like core having a pair of surfaces to which are bonded a metal foil so as to form a sandwich-type structure and wherein a lamina of natural facing stone is uniformly bonded to at least one of the pair of metal foils.

Abstract: An aluminum chassis for road or railway vehicles is such that the transverse beams are continuous and are attached to the longitudinal beams by means of angle-pieces using threaded bolts and nuts or, in particular, parallelogram-shaped nuts. The transverse beams and, if desired, the longitudinal sections of the frame--which can also function as longitudinal beams--feature undercut channels in which the nuts engage. This type of construction offers various advantages that are realized in the assembly of the chassis and in repairing damaged vehicles.

Abstract: A device for adjusting the size of the gap between casting rolls wherein the rolls are situated in bearings in supporting frames which are a variable distance apart. At least one of the supporting frames features, at its corner regions facing the other frame, bearing plates having faces inclined at an angle (w) to the axis (A) of a spindle. Moveable adjusting blocks are provided with wedge-shaped surfaces which rest against the inclined faces. Each of the adjusting blocks feature teeth which mate with threads on a spindle, the threads running counter to each other. As the spindle is rotated the blocks are moved either toward or away from each other thus raising or lowering the at least one supporting frame.

Abstract: A gas nozzle design for use in a swirling tank reactor used in the degassing of molten metal with a fluxing gas. The nozzle design eliminates metal leakage from the reactor around the nozzle tip and gas leakage within the fluxing gas delivery line.

Abstract: A process and device for galvanic deposition of a dispersion coating on the cylindrical or slightly conical inner face of a cathode workpiece effect the continuous feed of a circulating electrolyte containing metal ions and suspended, fine-grained hard particles. The cathodically polarized workpiece or its inner face is employed at least as the upper part of the outer wall of the ring-shaped electrolyte container. This inner face is fed electrolyte in the form of a rising, spiral-shaped but vortex-free stream. The process is employed for all cylindrical or slightly conical metallic inner faces which are at least open on one side, in particular for coating brake drums made of aluminum or an aluminum alloy.

Abstract: Improved filtration apparatus including a filter chamber having a metal inlet and a metal outlet defining a molten metal flow path therebetween and a filtration assembly engageable therewith disposed between the inlet and the outlet.

Abstract: The invention relates to a process for manufacturing highly active, dispersed aluminum hydroxide, of low apparent density. First, unground, very fine grained aluminum tri-hydroxide, of which more than 99% of the grains are at most 3 .mu.m in size, is introduced continuously into a reactor along with a stream of hot dry air, is whirled up and strongly dispersed, heated to 400.degree.-600.degree. C. and shock dehydrated. The low apparent density aluminum oxide flowing out of the reactor in the hot air stream is precipitated out by suitable mechanical means, dispersed in mildly acidic or mildly basic water and rehydrated with the aid of heating. The invention also relates to shaped components of highly active, dispersed low apparent density aluminum oxide having a specific surface area of at least 200 m.sup.2 /g, a pore volume of more than 1.2 cm.sup.3 /g and adequate resistance to fracture and wear.

Abstract: The invention relates to a process for coating bare, sheared edges of the pouring or drinking outlets stamped out in metal lids for beverage cans. In the process, modified lacquers are deposited electrophoretically on the bare, non-insulated sheared regions of the lid.

Abstract: A process and a device for manufacturing an extruded section of an aluminum alloy containing additions of boron or compounds thereof are intended to simplify the manufacture of aluminum alloy sections for use in nuclear science and technology. Using a boron-containing aluminum-based raw material a section is to be formed such that its design ensures adequate stability and at the same time the necessary screening properties. To this end a billet having a core of aluminum alloy with additions of boron or the like and a mantel surrounding the same is manufactured and hot formed by extrusion, such that, using the molten metal route or powder metallurgy, a blank of aluminum alloy of particular alloy groups with additions of boron or its compounds at a concentration of 0.05 to 50 wt % is taken as the starting basis.

Abstract: The region between the outermost firing shaft and the outer wall of a chamber type furnace for baking carbon blocks, in particular anodes for the fused salt electrolytic production of aluminum, comprises essentially at least one layer each of firebricks as the wall of the outermost firing shaft, insulating refractory foamed bricks and moler stone or calcium silicate bricks at the outer wall of the furnace. The layer of insulating, refractory foamed bricks is fixed to the outer wall without room for play. Sealing elements on a projection of the outer wall extending over but at a distance from the insulating layers and on the outermost firing shaft interlock with one another.

Abstract: In an apparatus for the continuous casting of metal, especially with a casting machine having circulating molds, the metal flows as a melt out of a nozzle, if appropriate with a nozzle mouthpiece, between molds and solidifies between side-limiting elements. The mouthpiece has adjoining it on each of its two sides a baffle which is followed in the casting direction by a cooling block. Between the baffle and cooling block there is a gap through which a gas can be blown into a corner region formed by the baffle, cooling block and melt, this gas forming a gas cushion in this corner region. The throughflow width of the molten metal between the baffles located opposite one another can be changed as a result of the movement of the baffles in the direction. The same applies to the width of the cooling blocks located opposite one another.

Abstract: The carbon anodes of aluminum reduction cells are suspended on anode rods. The lower part of these rods viz., the anode pins or stubs can be anchored in the carbon anode by pouring cast iron into suitably shaped anode pin or stub holes which are at least partially undercut at the sides.A horizontal layer of cast iron at least some millimeters thick is formed between the floor of the pin or stub holes and the lower face of the anode pins or stubs.The cast iron poured into the spaces around the anode pins or stubs heats these to over 400.degree. C. The mass of the cast iron poured in is smaller than the mass of the lower part of the anode pin or stub to be enclosed.

Abstract: A furnace for heating cylindrical charges, in particular billets, rods and tubes, features a transportation facility with a conveyance device which feeds the charges in the longitudinal direction through a treatment chamber, the cross-sectional shape of which is closely similar to that of the charge; the transportation device also features a jacking device which supports the charge such that, regardless of the charge diameter, the longitudinal axis of the charge is always at the same level in the treatment chamber. Situated in the walls of the treatment chamber are nozzle outlets which direct a heated jet of gas radially with respect to the longitudinal axis of the charge and onto the surface of the charge. The feeding of circulating hot gas to the supply channel for the nozzles takes place from both ends of the treatment chamber. A ventilator is situated above the mid point along the length of the treatment chamber and blows out both inlets to the feed channels.