Abstract: The invention relates to the cooling of a rotary kiln with a liquid cooling agent. According to the invention, the cooling agent is distributed to form an essentially even liquid blanket above the rotary kiln (1). In order to achieve this, a number of baffle plates (6) and/or nozzle pipes (9) is arranged at an equal height with respect to the surface of the rotary kiln (1).

Abstract: The invention relates to a separating conveyor for separating solid materials from liquids. According to the invention, above the conveying path (17) of the conveyor and essentially supported against the conveying path (17) there is arranged a grate (1) which at least at one end is connected to the conveyor by means of elastic members (2). In addition to this, the conveying path (17) is provided with members (6) in order to guide the grate and the solid materials.

Abstract: A sintered permanent magnet having the composition RE.sub.2 T.sub.14 B, where RE is a rare earth metal, T is a transition metal and B is boron, is treated by ion plating the magnet at an elevated temperature in the presence of a gas phase.

Abstract: A method for reducing the nitric oxide emissions of the exhaust gases from a diesel engine by means of a controlled recirculation of the exhaust gases, which are cooled off and humidified in a water bath. The exhaust gases created in the diesel engine (1) are conducted into the wet cleaner (3), and part of the exhaust gases conducted into the wet cleaner (3) are returned to the suction duct (10) of the diesel engine, so that the amount of the recirculated exhaust gas is maintained constant with respect to the total exhaust gas volume.

Abstract: A filtering method in which an object to be filtered and dewatered is brought through a finely porous suction face saturated with liquid, into hydraulic connection with a liquid situated under a negative pressure relative to the object to be dewatered. The filter plate or equivalent and the material to be filtered which adheres to the plate by the liquid suction, are surrounded by a pressure-tight cover. A positive pressure relative to atmospheric pressure is introduced into this cover, by which removal of liquid out of the material to be filtered is intensified. A device for providing such filtration is also provided.

Abstract: The present invention relates to a method for preparing iron silicate slags, by means of mixing with ferroalloy slag, to a molten slag which can be defibrated into fire-resistant and chemically resistant fibers. The advantageous composition for the molten slag is 15-25% Fe, 45-69%, SiO.sub.2 0-5% CaO, 4-10% MgO, 5-15% Al.sub.2 O.sub.3 and 0.5-3% Cr (percentages by weight).

Abstract: The present invention relates to a method for removing sulphur dioxide and possible hydrogen sulphide as well as nitric oxides from exhaust gases by means of sulphides in a liquid phase so that the sulphur is recovered in the form of molten elemental sulphur. The soluble sulphates formed in the scrubbing are regenerated after a known fashion by means of sulphides or by reducing back into sulphides and are conducted back into the sulphur dioxide absorption stage.

Abstract: The invention relates to a method for treating waste materials, particularly municipal solid waste materials. In the method the waste material is first pretreated in order to divide the waste material in a compost fraction and a refuse-derived fuel, and then for the compost fraction it is performed a biological waste treatment and for the refuse-derived fuel combustion in a high temperature. According to the method the exhaust gases created in the combustion of the refuse-derived fuel (3) are conducted to an after-burning chamber (13) which burning material it is utilized the gas produced from the biologically decomposed material (2) of the waste material.

Abstract: The invention relates to the aerating of domestic and industrial wastewaters by means of an aerator placed on the bottom of the oxidation pond. Particularly the invention relates to the structure of the stator of the aerator. The stator comprises the stator shell structure (4), the stator ducts (7) directed outwards with respect to the outer edge of the shell structure, legs (5) attached to the shell and extending to the bottom of the pond, as well as triangular blade members (6) fastened to the said legs.

Abstract: The invention relates to a method for measuring and adjusting electrochemical potential and/or component content in the process of treating valuable materials, when the valuable materials should be recovered either together or separately by aid of the values of the recovery range defined on the basis of electrochemical potential and component control. According to the invention, the measuring of electrochemical potential and/or component content is carried out by means of at least one electrode (4, 5), advantageously by means of a mineral electrode, so that in order to regulate the physicochemical state of the electrode and/or to remove the coating layer formed on the electrode surface and in order to protect the electrode, onto the electrode there is switched a supply voltage differing from the electrochemical balance potential of the electrode, which supply voltage is switched off before starting the measuring operation.

Abstract: A mould for the continuous casting of billets of steel or other metal with a high melting point is manufactured by electroforming and is reinforced throughout its thickness by a reinforcing material, such as carbon, boric, or glass fibers.

Abstract: The invention relates to a method and apparatus for reducing dust accretions while treating exhaust gases containing sulphur dioxide in smelting furnaces. According to the invention, on the roof (10) of a waste heat boiler connected to a smelting furnace (16), there is placed a nozzle (11), wherethrough some oxygen-bearing gas is conducted into the radiation chamber (13) of the waste heat boiler, which gas brings about a change in the composition of the exhaust gases and simultaneously reduces the accumulation of dust accretions.

Abstract: Disclosed is an apparatus for detecting magnetically conductive metals in a flow of material. The apparatus includes a metal casing open at both ends thereof and adopted to receive the material flow therethrough. Magnet bars are attached at two opposite inner walls of the casing in such a manner that, on one side, the north poles are directed inwards into the casing and the south poles are attached magnetically conductively to the casing, and on the other side the polarity of the magnetic bars is opposite, detector means being provided at the two remaining walls of the casing so as to detect the magnetic field at those positions. Finally, electronic circuit elements are connected to the detectors in order to convert the detected magnetic field variations into an observable form. The material flow may take place in a trough positioned within and extending through the casing.

Abstract: Method and apparatus for straightening of cast anodes on their way to a stage for electrolytic refining of metals. The straightening of the anodes and the elimination of the casting fins is carried out by pressing the anode at several spots or spot areas simultaneously. The apparatus includes a pressing member formed of horizontal and vertical bars. The adjacent ends of the horizontal and vertical bars form at least one of a 45.degree. miter joint configuration or are right-angled.

Abstract: Method and apparatus for straightening of cast anodes on their way to a stage for electrolytic refining of metals. The straightening of the anodes and the elimination of casting fins is carried out by pressing the anode at several spots or spot areas simultaneously.

Abstract: The invention relates to a calendar comprising pages for calendar information, illustrations and text, where the pages are attached together so that by turning a page, the next page is advantageously revealed. In the pages (3) containing calendar information, the calendar section (5) proper and the section (6) containing illustrations and/or text can be detached from each other. Moreover, the calendar may contain pages provided with other than calendar information, as well as a binding which is essentially of the same size as the section (6) remaining after the calendar information (5) has been removed. After the period of active use, the calendar can be used as a book.

Abstract: The invention relates to a method and apparatus for positioning sheet-like objects, anodes and/or cathodes, in an electrolysis tank, when the positioning is carried out by utilizing a gripping device (2) designed for gripping sheet-like objects and connected to the loading member (1). According to the invention, the gripping device (2) is movable with respect to the loading member (1) and the electrolysis tank (5) so that the position of the gripping device (2) is adjusted essentially accurately with respect to the electrolysis tank (5) and the loading member (1), on the basis of the measurements carried out by the aid of the identification marks (7) placed in the electrolysis tank (5).

Abstract: The invention relates to a method and an apparatus for detecting metal objects in a metal detecting apparatus using impulse techniques. The metal detector comprises a compensation circuit arranged in between the transmitter system (13) and the receiver system (14) in order to compensate the mutual inductance between the transmitter (11) and the receiver (12). The compensation circuit is advantageously operated so that the signal caused by the metal object in this detector is measurable during both at least two measuring sequences (21,22) located within the range of the cut-off peak of the transmitter current and during at least one measuring sequence (23) located outside the range of the cut-off peak of the transmitter current.

Abstract: The invention relates to an apparatus for drawing samples from material containing solid particles, which material is in a flowing motion. In the apparatus, the sampling member (3, 13, 24) is connected to an adjusting device (4, 15, 26) and a suction member (6, 17, 25) so that the material flow coming from the sampling member (3, 13, 24) by means of the adjusting device (4, 15, 26) can be directed via the suction member (6, 17, 25) to form the sample.

Abstract: The method of the invention relates to the manufacturing of tubes of a continuously cast or the like billet by means of cold working, wherein the temperature of the material rises to the recrystallization range due to the influence of the deformation resistance. The method is particularly related to the further working of billets made of non-ferrous metals such as copper, aluminum, nickel, zirconium and titanium, as well as of their alloys.