Abstract: A pair of adjacent horizontal coking chambers of a coke-oven battery are separated by a longitudinal wall with a multiplicity of vertical heating ducts, the wall being built from blocks which form two parallel frameworks defining the ducts between them. Each framework consists of longitudinal and transverse refractory blocks--preferably of silica--leaving rectangular apertures open toward the ducts and the chambers, these apertures being occupied by refractory plates of lower thermal resistance than the blocks. The transverse blocks of the two frameworks extend overlappingly between the ducts and have interfitting formations holding the frameworks together.

Abstract: A gas mixture containing significant proportions of nitrogen and oxygen, such as atmospheric air, is alternately passed through two adsorbers containing a carbonaceous molecular sieve such as comminuted coke. With one-minute half-cycles, each half-cycle encompasses a production phase of 55 seconds during which the gas mixture is driven under high pressure through one adsorber with recovery of high-purity nitrogen therefrom while the other adsorber is being exhausted or vented in a regeneration phase. During a small fraction of the remaining 5 seconds of this half-cycle, preferably lasting between 0.3 and 0.7 second, the two adsorbers are interconnected for a partial equalization of their pressures. In the final period of slightly more than 4 seconds, the regeneration phase of the first adsorber begins while the second adsorber is pressurized with fresh gas mixture, its outlet being closed at that time.

Abstract: A chamber for the treatment of particulate matter in a fluidized bed, e.g. at elevated temperatures, comprises an apertured bottom for the admission of carrier gas into the overlying space. The latter is divided by upstanding partitions into at least one medial compartment and at least two additional compartments adjoining the at least one medial compartment at the opposite sides of the latter. The apparatus further comprises a duct of substantially triangular cross-section with a horizontal base and an upwardly sloping side walls located in the at least one medial compartment, with the side walls of the duct extending in directions parallel to the partitions, and the base of the duct being imperforate and resting on the wall of the chamber and preventing the entry of the carrier gas into the at least one medial compartment from below; and a nozzle arrangement in each of the upwardly sloping side walls of the duct.

Abstract: In a method for regeneration of moist powder adsorption agent, the moist-charged adsorption agent is first fed into the lower area of a fluidized bed which is provided with an aeration and heat-carrying material; the agent then is fed upwardly through the heat-carrying material while being simultaneously dried, and then the agent is withdrawn together with the vortex gas from the fluidized bed. The agent is separated from the vortex gas in a successively switched separator, and is then fed to a further fluidized bed which is provided with a further aeration and heat-carrying material. The agent is fed in that further bed upwardly through the further heat-carrying material and is simultaneously regenerated. The agent is then discharged together with the further vortex gas from the further fluidized bed. The vortex gases which are withdrawn can be reused as mixing gases during the vortex gas generation.

Abstract: A mining tool with a rotary body carrying a number of peripherally spaced cutters has a water channel terminating in the vicinity of each cutter at a spray nozzle for the irrigation of particles such as coal dust detached from the mine face. The water supply for each nozzle is controlled by the associated cutter so as to be unblocked only when its working edge encounters resistance sufficient for a limited swing of the cutter shank about a pivotal axis against the force of a biasing spring, thereby opening a valve normally held closed by that spring.

Abstract: A roof support for coal-mining apparatus or other tunnel-excavating equipment has a shield plate with several rearwardly diverging and deepening longitudinal grooves in its upper surface. The grooves are designed to carry off detritus as the support advances and are spaced closely enough to form ribs therebetween adapted to crush larger chunks of overburden landing thereon.

Abstract: Method for bonding of anchoring bolts in boreholes, in which an anchoring bolt is pushed with a rotary motion into a twin-chamber cartridge, one compartment of which is filled with a polyisocyanate component and the other one with a hydroxyl component, prepolymer from the conversion of polyisocyanates with one or several difunctional polyols of the molecular weight range 800-5000, preferably 1600-3000, being used as polyisocyanate component.

Abstract: A pressure-swing adsorption system is used to enrich the methane content of mine gas obtained from bores around mine shafts or galleries from the customary 25 to 45% by volume to a product gas quality of 50% by volume. Using a carbon molecular sieve adsorbent, the adsorption is carried out at 5 to 8 bar and is followed by a uniflow expansion to an intermediate pressure and a counterflow expansion to a flushing pressure of 1.1 to 2 bar. Counterflow flushing is carried out with waste gas and the product gas is a mixture of the gases obtained by counterflow expansion and flushing.

Abstract: A slurry of solid particles suspended in water or some other liquid is elevated in a riser tube, extending upward from a closed vessel, under hydraulic pressure from the same liquid descending into the vessel from a hydrostatic column whose height is less than that of the riser tube; liquid exiting at the top of that tube is recirculated to the vessel through the column after being freed from the accompanying solids. The excess height of the riser tube is made possible by the admission of bubbles of air or some other gas into the tube at its lower end. Fresh particles to be entrained by the rising liquid are fed into the closed vessel via a gated conduit maintaining the hydrostatic pressure therein.

Abstract: Coating of geological formations as well as air- and fire barriers is performed by providing aqueous rubber or rubber-like dispersions and spraying the dispersions via separate conduits simultaneously with a dry hydraulic binding medium, by a pressure air onto an object to be coated. An inert filling material can be added to the hydraulic binding medium, and a tenside can be added to the dispersions.

Abstract: A procedure of bonding roofbolt rods to boltholes whereby the roofbolt rod is pushed under rotating movements into a bolthole filled with an adhesive mass consisting of a mix by whose reaction is obtained polyurethane, characterized in that a mass consisting of polyisocyanate-prepolymerides is used which has been prepared from polyisocynates and one or more bifunctional polyols in a molecular weight range between 800 and 5,000, preferably between 1,200 and 3,000, and which reacts in the borehole with 1 to 25% by weight (related to the mass) of water and/or polyols serving as the hydroxyl component.

Abstract: A carbonaceous adsorbent impreganted with elementary sulfur is produced by mixing the adsorbent with elementary sulfur in a quantity required for the desired impregnation, heating the mixture to a temperature between 120.degree. and 300.degree. C., maintaining this temperature over a time period of between 1 and 40 hours, and then cooling the mixture.

Abstract: A water nozzle, particularly for dust suppressing for example at cutting rollers, has a housing with a central opening, a guiding sleeve received at least partially in the central opening of the housing and having an inner passage which is stepped in an axial direction, and a piston stepped in the axial direction and displaceable in the passage of the guiding sleeve to a position in which a narrow gap is formed between the piston and the guiding sleeve so as to prevent solid particles entrained in a flow of water from entering the nozzle. The piston is spring biased in a direction opposite to the direction of the flow of water, so that upon termination of the latter the piston dislodges the solid particles accumulated at the nozzle.

Abstract: A gate valve for selectively blocking and unblocking a flow path has a valve body filled with hydraulic liquid and provided with a pair of shutters displaceable by fluid pressure against respective seating surfaces of a valve housing. The valve body is shiftable between a blocking position, in which the shutters are aligned with their seating surfaces, and an unblocking position by means of a plunger projecting into the hollow body in a fluidtight manner but with freedom of relative displacement in the shifting direction. In a valve-closing stroke, the plunger pushes that body into its blocking position solely via the confined liquid; when the body is arrested in that position by a stop, the continuing plunger stroke displaces the liquid to press the shutters onto their seats against a biasing force such as that of elastic membranes holding them onto the body.

Abstract: For consolidation of geological formations and artificial beds of rock, earth, and coal by means of foaming and hardening polyisocyanate/polyol blends, diols with secondary hydroxyl functions of the OH number range 150-1000 are used as diol component. Preferably a crude polyisocyanate blend (MDI) obtained by phosgenation of aniline/formaldehyde condensates which at ambient temperature assumes a liquid state, and the liquid prepolymers of said crude MDI are used as isocyanate components.

Abstract: An apparatus for the approximate determination of forces acting on a support frame which has a compression member disposed between two pressure plates. The compression member has a coating of a material such as enamel which separates from the member as a function of the members' deformation under compressive forces and thus is an indicator of the magnitude of such forces.

Abstract: Fuels, particularly caking fuels, are supplied in a fluidized bed reactor by conveying a fuel through an injection pipe with an end provided with an injection nozzle in a fluidized bed reactor, conveying a fluid through a jacket pipe surrounding the injection pipe and having an end provided with a jacket nozzle, wherein the jacket pipe is interrupted prior to the jacket nozzle, as considered in the flow direction, and at a predetermined location, and bypassing by a heat exchanger at this location at which the jacket pipe is interrupted.

Abstract: The overall yield from hydrogenation of coal is increased by following the method of the present invention according to which additional amounts of oil are released from the separated residue obtained in a vacuum distillation operation following the initial coal hydrogenation, in that a light oil fraction obtained during the initial coal hydrogenation and having a boiling point in the range between 35.degree. and 200.degree. C. is added to the residue to act as a solvent therefor, whereupon the solution is hydrogenated at a temperature in the range between 350.degree. and 450.degree. C. under a hydrogen pressure of 300 to 400 bar for 0.5 to 2 hours. The solvent advantageously includes alkanes, cycloalkanes, aromatics, phenols or mixtures thereof having their boiling points within the above range. A catalyst selected from the series of transition metals may be added to further increase the oil yield from the hydrogenation of the residue.

Abstract: Processes for sealing and strengthening water-bearing geological formations by injection thereinto a polyurethane-resin-forming composition that is especially suitable for this purpose which comprises a conventional polyisocyanate, a conventional polyol, an accelerator for the reaction between the polyisocyanate and the polyol, and a foam stabilizer.

Abstract: Waterglass solutions are mixed with polyisocyanates and these emulsions are then left to harden in the formations. Introduction of the mixture into the formations which are required to be consolidated, e.g. deposits of coal, is mainly carried out by forcing the mixture under pressure into bore-holes in the formations. According to one variation of the process, the components of the mixture are introduced into the multi-chamber cartridges which are introduced into the bore-holes and then destroyed as the components are mixed. Certain additives such as accelerators, blowing agents, polyols, stabilizers and/or thixotropic agents are advantageous for the quality of the composite masses formed by hardening of the mixture.