This filtration device 10 has a can body 20 having a reservoir 3 that connects to an opening 9 at the top, and a filtration unit 40 which is detachably installed in the reservoir. The filtration unit has a support plate 42, and filtration tubes 41 of bottomed cylindrical shape fastened to the support plate. The side wall 22 of the can body 20 has a protruding locking part 30 for installation of the filtration unit so that the filtration tubes are suspended from the support plate 42, with the openings 43 thereof facing upward. With the support plate 42 locked into the locking part 30, pressing members 70 for pressing the support plate 42 downward from the upper surface side in sections thereof lying towards the peripheral edge S in relation to the fastening locations of the filtration tubes 41 are deployed, making it possible for the support plate 42 to be fastened in clamped fashion by the locking part 30 and the pressing members 70.

A molten metal pump comprised of a base defining a pumping chamber, an impeller disposed within said pumping chamber, an outlet passage extending from said pumping chamber, said outlet passage being defined by opposed top and bottom walls and opposed side walls, wherein said top and side walls terminate at an intersection with a boundary of the base and said bottom wall terminates inward from said boundary.

The invention relates to systems for transferring molten metal from one structure to another. Aspects of the invention include a transfer chamber constructed inside of or next to a vessel used to retain molten metal. The transfer chamber is in fluid communication with the vessel so molten metal from the vessel can enter the transfer chamber. A powered device, which may be inside of the transfer chamber, moves molten metal upward and out of the transfer chamber and preferably into a structure outside of the vessel, such as another vessel or a launder.

The invention discloses a method and application for a safe recovery of waste anode pieces of lithium ion batteries. The method comprises the following steps: crushing and sieving the waste anode piece to obtain an anode powder A and a crushed aluminum slag; mixing the crushed aluminum slag with an acid solution, stirring under ultrasound, and then performing wet sieving to obtain an aluminum slag and a battery powder; the obtained aluminum slag is washed with water, then rinsed with an explosion suppressant, centrifuging to obtain an explosion suppressing aluminum slag, and then packed and compressed to obtain an aluminum slag block; connecting the two ends of the aluminum slag block to a positive plate and a negative plate of a DC electrode respectively, applying a current to melt the aluminum slag block, and cooling to obtain a safe aluminum slag block.

The invention discloses a method and application for a safe recovery of waste anode pieces of lithium ion batteries. The method comprises the following steps: crushing and sieving the waste anode piece to obtain an anode powder A and a crushed aluminum slag; mixing the crushed aluminum slag with an acid solution, stirring under ultrasound, and then performing wet sieving to obtain an aluminum slag and a battery powder; the obtained aluminum slag is washed with water, then rinsed with an explosion suppressant, centrifuging to obtain an explosion suppressing aluminum slag, and then packed and compressed to obtain an aluminum slag block; connecting the two ends of the aluminum slag block to a positive plate and a negative plate of a DC electrode respectively, applying a current to melt the aluminum slag block, and cooling to obtain a safe aluminum slag block.

A process and an apparatus are disclosed for improved recovery of metal from hot and cold dross, wherein a dross-treating furnace is provided with a filling material with capacity to store heat. This filling material is preheated to a desired temperature by injection of an oxidizing gas to burn non-recoverable metal remaining in the filling material after tapping of the recoverable metal contained in the dross and discharging of the treatment residue. When dross is treated in such furnace, the heat emanating by conduction from the filling material is sufficient to melt and separate the recoverable metal contained in the dross, without addition of an external heat source, such as fuel or gas burners, plasma torches or electric arcs and without use of any salt fluxes. Furthermore, the recovered metal being in the molten state can be fed to the molten metal holding furnace without cooling the melt.

The invention generally relates to foam ceramics (3) and to filters comprising such a foam ceramic, and to a method for producing foam ceramics and filters comprising or made of such a foam ceramic. Another aspect relates to the use of the foam ceramic (3) and of a filter comprising or made of such a foam ceramic.

A process for treating a material to remove sulphates or other impurities therefrom comprises a) subjecting the material to a leaching step to selectively dissolve sulphate-containing material or dissolve other impurities from the material and/or to passivate gypsum, b) separating a leach solution generated in step (a) from solids, and c) treating the solids from step (b). The solids from step (b) may be leached to dissolve Si and/or Al and the pregnant leach solution can be treated to precipitate zeolites. The process can be used to make zeolites from feed materials, including leached spodumene residue. Step (a) is a pre-wash/pre-leach step that removes impurities that could otherwise interfere with the zeolite precipitation step or require further processing of the pregnant leach liquor.

A process for treating a material to remove sulphates or other impurities therefrom comprises a) subjecting the material to a leaching step to selectively dissolve sulphate-containing material or dissolve other impurities from the material and/or to passivate gypsum, b) separating a leach solution generated in step (a) from solids, and c) treating the solids from step (b). The solids from step (b) may be leached to dissolve Si and/or Al and the pregnant leach solution can be treated to precipitate zeolites. The process can be used to make zeolites from feed materials, including leached spodumene residue. Step (a) is a pre-wash/pre-leach step that removes impurities that could otherwise interfere with the zeolite precipitation step or require further processing of the pregnant leach liquor.

The invention relates to systems for transferring molten metal from one structure to another. Aspects of the invention include a transfer chamber constructed inside of or next to a vessel used to retain molten metal. The transfer chamber is in fluid communication with the vessel so molten metal from the vessel can enter the transfer chamber. A powered device, which may be inside of the transfer chamber, moves molten metal upward and out of the transfer chamber and preferably into a structure outside of the vessel, such as another vessel or a launder.