Abstract:
An impact mill equipped with transmission machinery (10) to rotate two coaxial rotors (16, 18) of a rotor apparatus (12) by one single driving apparatus (14). The transmission device includes, according to one alternative, a secondary shaft (32; 36b) equipped with a gear pair (28, 30) or a conic gear (29). The first gear (28) rotates a gear (24) at the shaft (20) of the first rotor (16), and the second gear (30) rotates a gear (26) at the shaft (22) of the second rotor (18), but in the opposite direction or at a different speed. The conic gear (29) rotates the gear (24a) at the shaft (20) of the first rotor (16) in one direction, and the gear (26a) at the shaft (22) of the second rotor (18) in the opposite direction.
Abstract:
A method and apparatus for treating materials or material mixtures in a treatment apparatus operating on the principle of the double-action impact mill, which includes a discharge conveyor (34), such as a discharge screw. A material layer (40) is maintained between the discharge opening and the discharge conveyor, using the material exiting the outermost ring (16″) of the treatment apparatus through the discharge opening (30), which layer prevents free discharge of the material to be treated from the treatment apparatus.
Abstract:
A method and apparatus for biological and/or chemical decomposition of waste containing organic mattter. The method comprises waste pretreatment in which the waste is fragmented and homogenised in a pretreatment apparatus (10a, 10b) operating on the principle of a multi-ring double action impact mill. The apparatus consists of either two rotors (62, 64) or a rotor adn stator disposed inside a housing (26), which rotors adn/or stator are equipped with blades (1a,b,c,... 2a,b,c,... ) having impact surfaces (a', b', c', ...), and which form one or more, typically at least two rings (1, 2, 3, ...) coaxial with the rotor. The waste is fed into the housing through the hub of rings formed by the blades, from where the waste is arranged to travel by the effect of a rotor or rotors, to the outer ring of the ring (7) formed by the outermost blades, and further to the discharge opening (25, 27') in at the outer ring.
Abstract:
Method of producing a board containing wood chips from a wood-based starting material. According to the method, the starting material is disintegrated into wood chips of a preselected size for producing a mass, and then the mass containing wood chips is used for forming a board. According to the invention, the starting material is disintegrated with a continuous flow mixer (1) operating according to the impact mill principle, said mixer having at least two milling rotors, one inside the other (4-7, 10, 11), having milling vanes (10, 11), at least one of the rotor being rotatable and at least a part of the vanes (1) of the outermost milling rotor being disposed in an angular position with regard to the radial direction of the rotor. With the help of a disintegrator of the impact mill type, it is possible to continuously regulate the result of the milling/disintegration.
Abstract:
Method for the preparation of finely divided calcium hydroxide, where calcium oxide is comminuted in an impact disintegrator into which in addition to the calcium hydroxide a small amount of water is led to wet the particles obtained and to bind the dust. The calcium oxide powder is led to a conveyor being in connection with the impact disintegrator and operating as a pre-quencher, to which conveyer water is added and where the material is subjected to a kneading effect. The material which is a mixture of calcium oxide and calcium hydroxide is led from the conveyor to a cistern operating as post-quencher, to which cistern the remaining portion of the total water amount required for quenching is added. The amount of water added to the impact disintegrator and to the pre-quencher is altogether 20...50 % of the total amount of water required for quenching, preferably about 1/3 of the total amount of water required for quenching, and the amount of water added to the post-quencher is 80...50 % of the total amount of water required for quenching, preferably about 2/3 of the total amount of water required for quenching.
Abstract:
Disclosed is a method for treating waste and residual matters consisting of solid organic and inorganic materials, or composite materials or mixtures thereof. According to the inventive method, a device which suddenly interrupts the flow of the composite material or mixture disintegrates or separates the components thereof by means of an impulse. Processing air is fed into a rising flow path (34) counter to the path of conveyance (32) which is created in a downward spiraling manner within a rotor (26) having a vertical axis (A), whereby a shock wave is produced between the layers of the composite material on an impact wall of the rotor (26). Additionally, two wall surfaces which are coaxially assigned to each other at a radial distance from each other turn around the axis thereof relative to each other, and the composite materials or mixtures which are moved by a centrifugal force are brought into motion and disintegrated between impact surfaces which radially protrude from the impact walls.
Abstract:
In a process for mechanically cleaning a powder (25), the powder is projected at a predetermined speed and at a determined frequency during a defined time against at least one surface in order to separate therefrom particles of impurities (35) that adhere to its surface. The thus obtained powders (30, 31 and 35) are then sorted according to size. A cleaning device (1) for carrying out the process has a separator (2) mounted upstream of a wind sifter (3) or cyclone (4). A simplified embodiment of the cleaning device (1) has only a wind sifter (3).