Abstract: A defoaming apparatus comprises, in juxtaposition, a defoaming treatment chamber internally provided with a defoaming unit for defoaming, as a result of a rotation of a impeller in a casing having a suction port and discharge ports, by suctioning foam of a foaming liquid via the suction port of the casing and colliding the suctioned foam against an inner circumferential surface of the casing by centrifugal force of the impeller and a substantially closed-type tank for housing a foaming liquid, wherein the suction port of the defoaming unit is located in a foam phase region of the tank.

Abstract: An apparatus for processing an alkaline solution includes a storage tank storing the alkaline solution to be processed; a processing unit sucking a foam phase disposed on the liquid surface level of the alkaline solution in the storage tank, defoaming the foam phase by centrifugal separation, and extracting the foam phase outside the storage tank, the processing unit including an extraction tube; a separating tank separating scum and a liquid, the separating tank being connected to the extraction tube; a scum-discharging component discharging the scum in the separating tank outside the separating tank; and a liquid-discharging component discharging the liquid in the separating tank outside the separating tank. In the apparatus, the scum and the liquid separated in the separating tank are separately discharged outside the separating tank with the scum-discharging component and the liquid-discharging component, respectively.

Abstract: A defoaming apparatus comprises, in juxtaposition, a defoaming treatment chamber internally provided with a defoaming unit for defoaming, as a result of a rotation of a impeller in a casing having a suction port and discharge ports, by suctioning foam of a foaming liquid via the suction port of the casing and colliding the suctioned foam against an inner circumferential surface of the casing by centrifugal force of the impeller and a substantially closed-type tank for housing a foaming liquid, wherein the suction port of the defoaming unit is located in a foam phase region of the tank.

Abstract: An apparatus for processing an alkaline solution includes a storage tank storing the alkaline solution to be processed; a processing unit sucking a foam phase disposed on the liquid surface level of the alkaline solution in the storage tank, defoaming the foam phase by centrifugal separation, and extracting the foam phase outside the storage tank, the processing unit including an extraction tube; a separating tank separating scum and a liquid, the separating tank being connected to the extraction tube; a scum-discharging component discharging the scum in the separating tank outside the separating tank; and a liquid-discharging component discharging the liquid in the separating tank outside the separating tank. In the apparatus, the scum and the liquid separated in the separating tank are separately discharged outside the separating tank with the scum-discharging component and the liquid-discharging component, respectively.

Abstract: A brush roll comprising a roll shaft; first brush filling material comprising either of a single yarn of a filament having a diameter of 0.1-2.0 mm and a collective fiber comprising 3-56 filaments made into a bundle; and second brush filling material comprising 100-3,000 filaments having a diameter of 0.005-0.05 mm made into a bundle, the first brush filling material and the second brush filling material being so arranged around an outside surface of the roll shaft that they can be distributed in such a relation as to be mixed with each other.

Abstract: A steel strip is degreased with low power consumption by subjecting the steel strip to electrolytic washing in a degreasing apparatus including an electrolytic washing apparatus in which electrodes confront each other across the steel strip located therebetween, and charge density and current density are maintained within a predetermined range. There is also provided a simple steel strip degreasing apparatus which is especially suitable for the method.

Abstract: A brush element U includes an assembly of annular disks 2 joined together as arranged side by side. Each disk has polishing bristles or cleaning yarns 1 implanted in its outer periphery. The brush elements U are arranged side by side around a shaft 3. The brush element U is engageable with the shaft 3 by keyways 5 formed in both a peripheral surface of the shaft 3 and an inner peripheral surface of the brush element U and by sunk keys 4 fitted in the respective keyways 5. The sunk keys 4 have a length not larger than the length of the brush elements U, and each of the sunk keys 4 is expandable or contractable widthwise and tightly engageable in the keyway 5 when being expanded. The sunk key 4 is disengageable therefrom when being contracted. The sunk key 4 is prevented from slipping out of the keyway 5 by a retainer C when being contracted and fitted in the keyway 5. The brush roll and brush elements thereof are useful for grinding, polishing cleaning or otherwise treating steel sheets, plates, or strips.

Abstract: Disclosed are a method and an apparatus for cleaning a strip, the method comprising electrolytically cleaning a strip by passing the strip between opposed nozzles, one of the nozzles being the anode and the other being the cathode, for ejecting an alkali aqueous solution over the strip, applying a voltage to the nozzles and brushing the strip, in a spray of cleaning water, with a brush roll or brush rolls disposed at a position(s) adjacent to the nozzles downstream thereof in the travelling direction of the strip.

Abstract: A method of polishing or grinding metal strips moving longitudinally thereof, the method comprising brushing or polishing the metal strip using a brush roll which is rotatable and is held, during rotation, in contact with the strip surface pressed by the brush roll while supplying a mixture of a grinding fluid or water with abrasive grains to a portion of strip surface to be brushed or polished, the brush roll having a plurality of abrasive members each comprising a plurality of rod-shaped elastic supports and a plurality of abrasive tips, the abrasive tips being formed from a mixture of abrasive grains and a resin and attached to the forward ends of the supports, and the plurality of abrasive members being mounted in clusters on a roll shaft, wherein the strip surface is brushed by the brush roll under a pressure of at least 1 kg/cm.sup.

Abstract: A brush roll comprising a multiplicity of brush disk segments mounted on a shaft in a circular arrangement around the axis of the shaft and arranged closely longitudinally of the shaft, each of the brush disk segments including a board substantially in the form of a sector with an angle of about 15 to about 60 degrees, and a plurality of abrasive members attached to and arranged along the outer peripheral edge of the board, the board having a key substantially in the form of a dovetail and opposed to the shaft, the shaft having a peripheral surface formed with substantial key grooves, the key grooves substantially resembling a dovetail and each extending longitudinally of the shaft for the key to fit in.