Abstract: The disclosure relates to apparatus for producing mechanical wood pulp of the type having a grinding stone with at least one wood supply chute in which the wood which is to be ground is pressed onto the grinding stone. A trough or a collecting channel is placed underneath the grinding stone. A water supply device moistens the grinding stone at the grinding zone. At least one closed water tank is set up on the grinding stone in front of the wood supply chute, viewed in the direction of rotation of the grinding stone. The water tank is sealed at least on the side furthest away from the supply chute. The tank has a supply line for pressurized water and has outlet holes directed toward the surface of the stone. Preferably, sealing of the water tank is effected by a sealing plug at the grinding stone which plug is adjustable with respect to the grinding stone to accommodate wear of the plug from the stone.

Abstract: This invention relates to a method and apparatus for grinding with two toothed plates operating face to face, one of which plates is fixed and the other of which is rotated by a shaft, with an axial supply of material to be ground and peripheral evacuation of the ground products. Chambers are provided for circulating of cooling water in contact both with the fixed plate and with the rotatable plate. At an intermediate radial point of the plates, a liquid nitrogen injector which enables reduction of the temperature of the product during treatment and making the grinding zone inert is fitted. The invention is applied to the grinding of rubber.

Abstract: An agitator-type ball mill has a circumferential wall which bounds a working chamber having an axis and includes two radially spaced jackets which form therebetween a gap for receiving a heat-exchange medium. The jackets are releasably connected with one another so that they can be separated from each other by displacement in an axial direction. A flexible member is arranged in the gap between the jackets, connected with one of the jackets, and forms a substantially helical passage in the gap. The heat exchange medium flows through the thus-formed helical gap. The flexible member may be formed by a band which is inserted in a helical groove provided in one jacket and extends radially into the gap so as to abut against the other jacket with prestress.

Abstract: An apparatus for vitrifying blast furnace slag, which comprises:an endless conveyor belt formed by endlessly connecting a plurality of rectangular cooling metal members, each of said cooling metal members having a plurality of narrow and deep cooling grooves on the outer surface thereof for rapidly cooling and solidifying a molten blast furnace slag into a vitreous blast furnace slag; a driving means for travelling said endless conveyor belt; a molten slag container, arranged above the upstream of the upper forwarding position of said endless conveyor belt, for pouring a molten blast furnace slag into said cooling grooves; a stripper arranged, in the upstream of the lower returning position of said endless conveyor belt, at a prescribed position adjacent to the back surface of said endless conveyor belt, for taking out a cooled and solidified vitreous blast furnace slag in said cooling grooves; and, a cooling means arranged at a prescribed position in the lower returning position of said endless conveyor belt

Abstract: In a process and plant for producing cool sintered particulate agglomerated solids of ore, the solids are moved in a continuous stream through a heat-treating zone to form a layer of the agglomerated solids and hot particles thereof are obtained from the layer. The hot particles are moved in a continuous stream into a structurally separate cooler which is heat-insulated from the heat-treating zone and through the cooler in a cooling path. Cooling air is blown into the cooler to flow countercurrently to the continuous stream of hot particles in the cooling path to subject the hot particles to forced countercurrent cooling whereby the cooling air is heated by contact with the hot particles and the entire heated cooling air is delivered into the heat-treating zone.

Abstract: The disclosure concerns both a process and an apparatus for producing wood pulp. Wood to be pulped is fed into a housing where the wood is ground. The housing is pressurized above atmospheric pressure. Water at a temperature over 100.degree. C. is fed to the pressurized housing in the grinding zone. The wood pulp produced by grinding is collected and is conveyed through a worm conveyor which causes the water in the pulp to be removed therefrom, while the pulp and the water removed therefrom are maintained at elevated pressure. The water under pressure is returned to the grinding zone in the housing. The wood pulp is thereafter returned to atmospheric pressure. Various pressure lock devices for transmitting the wood pulp from being under pressure to atmospheric pressure are disclosed including a nozzle, a pressure lock device, a hydrocyclone and/or a disc refiner.

Abstract: Hydrogenation of coal is improved through the use of a mechanical force to reduce the size of the particulate coal simultaneously with the introduction of gaseous hydrogen, or other hydrogen donor composition. Such hydrogen in the presence of elemental tin during this one-step size reduction-hydrogenation further improves the yield of the liquid hydrocarbon product.

Abstract: A device for crushing sinter and other material of like consistency is disclosed wherein the flow sinter material is deployed against an impact table which directs the sinter material downward onto a series of vertically disposed discs fixed to a common means of rotation. The common means of rotation intersects each disc through its central axis. Adjacent to the discs and parallel to the common means of rotation is positioned a shaft upon which are mounted crusher means arranged to intersect and pass between the discs. As sinter is directed downward onto the discs, the crusher means rotates and forces the sinter between the discs, thus crushing it. Heat buildup in the discs is controlled by a means of cooling which impinges on the discs.

Abstract: Apparatus is disclosed for the heat treatment of thermoplastics containing industrial and domestic refuse, as well as plastics waste. The refuse or waste is previously comminuted to a size capable of being treated in the process, then fed into the apparatus which is a crushing roller press. The press has a rotatably driven roll in a machine body, the machine body and the roll forming a converging infeed gap and two crushing gaps along the circumference of the roll. Just before a charging hopper there is a discharge opening provided with an adjustable scraper.

Abstract: A blower beater mill in which a rotor has a beater portion provided with beater arms in the form of two interconnected parts. Beater arm bases are fastened in hub rings of the shaft of the rotor, and fastening elements of two beater arm portions are located above shaft crests of the hub rings. Cover elements are located axially with the rotor in a free space between the beater arm bases, and these cover elements are located on a diameter between the shaft crests of the hub rings and the fastening elements of the beater arm portions. Openings pass through the beater arm bases between the cover elements and the shaft crests of the hub rings in the axial direction of the rotor. An opening in one beater arm base is aligned with the opening in the corresponding beater arm base of the following beater arm rows. The cover elements have an outside jacket which surrounds the shaft crests of the hub rings at a distance. The jacket has cutouts for accommodating the beater arm bases.

Abstract: A blower beater mill for grinding and drying operations in which a rotor is provided with a beater portion located on the mill shaft and has also a fan impeller. Beater arms of a beater portion are fastened between hub rings of the mill shaft. The shaft is water-cooled along its longitudinal axis. Shaft crests of the hub rings are enclosed by a jacket at a spaced distance therefrom. The jacket is made of individual rings through which the beater arms pass. The width of these rings is slightly larger than the spacing between two adjacent rows of beater arms. The rings, moreover, overlap in the area of cutouts of the beater arms. The rings may have U-shaped profiles with vertical legs inserted together with the beater arms into grooves between the hub rings. The space between two adjacent U-shaped rings and two adjacent beater arms, located within one beater arm row, is covered by sheet metal connected to the rings and the beater arms.

Abstract: An abrasive finishing machine comprising a cylindrical tub and a rotating base has annular sealing members attached to the tub and base of which the stationary sealing member is formed with axial ports for the injection of cooling fluid under pressure to cool and lubricate the rubbing surfaces and to wash intruding particles back into the tub.

Abstract: Continuously operable apparatus for the preparation and/or processing of synthetic plastics or rubber moulding compounds, comprising a housing in the form of a channel and a mixing and kneading member engaged in the channel and having a surface which co-operates with the bottom wall of the channel, in which said bottom wall and said surface of the mixing and kneading member are undulatingly profiled in a manner such that the profiles extend transversely or obliquely with respect to the longitudinal axis of said channel and said member, and drive means, including at least one crank drive, coupled between the housing and said member to cause said member and said housing, while retaining their respective orientations to move relatively to one another to cause the peaks of the undulations on one of said surface and said bottom wall to perform a circular movement in associated valleys in the other of said surface and said bottom wall.

Abstract: The shaft cooler comprises a plurality of power-driven adjacent horizontal hollow perforated comminuting rolls. An upper section of the shaft cooler is adapted to hold a layer of material from 50 to 100 cm. deep above the rolls. Cooling air is supplied to the interior of each roll to cause it to be discharged into such layer of material. An aftercooling section below the rolls is provided with means for indirect cooling of the comminuted material and has a depth which is several times that of said layer.

Abstract: Grinding mill including at least one container partially filled with grinding media, and at least one excitation member extending in direction of the longitudinal axis of the container and disposed within the container so as to be surrounded by the grinding media received in the container; the excitation member being supported on the wall of the container by a plurality of individual rod-shaped support elements extending substantially radially from the excitation member and disposed in spaced relationship to one another in direction of the longitudinal axis.

Abstract: A method and apparatus for milling grain while simultaneously cooking the grain in which the grain is introduced between coaxial relatively rotatable grinding members and advances therebetween while being milled. The milling of the grain develops heat in the grain which converts the moisture therein to steam which effects cooking of the grain. Most, if not all, of the steam thus generated is reabsorbed by the milled grain as it emerges from the apparatus. In order to enhance the cooking effect on the grain, the outer one of the conical grinding members has a heated gaseous medium supplied thereto and the mill includes an impeller for forcing the gaseous medium through the inner one of the grinding members so that both of the grinding members are heated and thereby enhance the cooking of the grain being milled in the apparatus.