Method for operating the air circuit and conveying stock flow in the casing of a hammer mill
AssigneeMetso Lindemann GmbH
InventorsManfred Adolph, Erich Kohl, Heike Sommerfeld
Life of this patent
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Abstract
To operate the air circulation and convey the stock flow of scrap material comminuted in the housing (1) of a hammer mill, the airflow generated by the blower effect of a rotor (2) and the stock flow passing through an upper classifying grate (4) are diverted by a deflector hood (8) and guided vertically downwards into a duct (6) that is separate from the housing (1). The stock flow is combined with the stock flow classified in the area of a lower classifying grate (5). The air flow is then guided in the circulating air and the combined stock flow is conveyed to a device (11) for further processing, sorting and/or conveyance.
Claims14
A method for operating air circulation and conveying stock flow in a housing (1) of a hammer mill during comminution of scrap material, comprising the steps of:
- (a) continually feeding the scrap material to be comminuted through a stock inlet (3) provided in the housing (1) having an upper and a lower portion,
- (b) comminuting the scrap material with a rotor (2) including tools, the rotor is rotatably supported in the housing (1) and produces a blower effect with an air flow,
- (c) conveying the stock flow of the comminuted scrap material through a stock outlet in an upper classifying grate (4) provided in the upper portion of the housing (1), and conveying the stock flow of the comminuted scrap material through a stock outlet in a lower classifying grate provided in the lower portion of the housing, within an internal air circulation loop, a plane of the upper classifying grate is inclined relative to a rear wall of the housing (1), and wherein the stock flow is guided between grate bars of the upper classifying grate that are oriented substantially perpendicular to the inclined grate plane,
- wherein the air flow produced by the blower effect of the rotor (2) together with the classified stock flow that passes through the upper classifying grate (4) of the comminuted scrap material is diverted by a deflector hood (8) and guided downwardly in a duct (6) that is separate from the housing (1), and wherein the stock flow is combined in a region of the lower classifying grate (5) with the stock flow of the comminuted scrap material classified at the lower classifying grate (5), and wherein the air flow is repeatedly guided in a loop by underpressure in the loop between the lower classifying grate (5), the comminution chamber (7), the upper classifying. grate (4) and the duct (6), and wherein the combined stock flow of the comminuted scrap material is conveyed to a device (11) for further processing.
A housing of a hammer mill having an upper housing and a lower housing the housing including a rotor which is rotatably supported in a housing and provided with a plurality of tools, a stock inlet (3), a stock outlet provided in the upper housing with an upper classifying grate (4) and a stock outlet provided in the lower housing with a lower classifying grate (5), wherein the housing (1) has a deflection hood (8) following the upper classifying grate (4), followed by a duct (6) leading to the region of the lower classifying grate (5), the upper classifying grate (4) is inclined when in a position covering the upper stock outlet, wherein grate rods of the upper classifying grate, as viewed in cross-section, are oriented substantially perpendicular to the inclination plane and wherein stock flow is combined in a region of the lower classifying grate (5) with stock flow of comminuted scrap material classified at the lower classifying grate (5), and wherein air flow produced by the rotor is repeatedly guided in a loop by underpressure in the loop between the lower classifying grate (5), the comminution chamber (7), the upper classifying grate (4) and the duct (6).
A hammer mill having a housing, including an upper housing and a lower housing, the housing including a rotor which is rotatably supported in a housing and provided with a plurality of tools, a stock inlet (3), a stock outlet provided in the upper housing with an upper classifying grate (4) and a stock outlet provided in the lower housing with a lower classifying grate (5), wherein the housing (1) has a deflection hood (8) following the upper classifying grate (4), followed by a duct (6) leading to the region of the lower classifying grate (5), and wherein the upper classifying grate (4) is substantially horizontal when in a position covering the upper stock outlet, and wherein the grate rods of the upper classifying grate, as viewed in cross-section, are inclined relative to the horizontal and wherein stock flow is combined in a region of the lower classifying grate (5) with stock flow of comminuted scrap material classified at the lower classifying grate (5), and wherein air flow produced by the rotor is repeatedly guided in a loop by underpressure in the loop between the lower classifying grate (5), the comminution chamber (7), the upper classifying grate (4) and the duct (6).
A hammer mill having a housing, including an upper housing and a lower housing, the housing including a rotor which is rotatably supported in a housing and provided with a plurality of tools, a stock inlet (3), a stock outlet provided in the upper housing with an upper classifying grate (4) and a stock outlet provided in the lower housing with a lower classifying grate (5), wherein the housing (1) has a deflection hood (8) following the upper classifying grate (4), followed by a duct (6) leading to the region of the lower classifying grate (5), and wherein a pivotable upper classifying grate (4) which at the same time represents a counter-tool for the tools of the rotor (2) as well as a swing-out door, wherein the upper classifying grate (4) is substantially horizontal when in a position covering the upper stock outlet, and wherein the grate rods of the upper classifying grate, as viewed in cross-section, are inclined relative to the horizontal and wherein stock flow is combined in a region of the lower classifying grate (5) with stock flow of comminuted scrap material classified at the lower classifying grate (5), and wherein air flow produced by the rotor is repeatedly guided in a loop by underpressure in the loop between the lower classifying grate (5), the comminution chamber (7), the upper classifying grate (4) and the duct (6).
Dependencies are inferred from the claim text.