Classifying apparatus and systems such as classifying tanks are used to classify material such as aggregate material.
Referring to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, a classification tank 10 is illustrated in
The hydraulic classification tank 10 facilitates the use of the control system (
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At step 602, the controller 510 begins a new calculation cycle (e.g., during operation of the system 500). At step 610, the controller 510 determines whether a station analysis auto-select mode has been enabled (e.g., enabled using a user interface in data communication with the controller 510).
If at step 610 the station analysis auto-select mode is not enabled, then at step 650 the controller runs calculations using the currently (e.g., previously) selected station analysis to determine an amount of time (e.g., percentage of total time) to open each individual discharge pipe 27 (e.g., using actuators 520) at each station 14 in order to create one or more products (e.g., product A and/or B). At step 651, the controller 510 determines (e.g., estimates, calculates) based on the current station analysis whether one or more products (e.g., product A and/or B) will be within a desired specification (e.g., entered using a user interface) based on the current station analysis. If at step 651 the product is determined to be within specification, then the controller 510 finishes the calculation cycle at step 670. If at step 651 the product is determined not to be within specification, then the controller 510 retains the current controller settings (e.g., in order to open each discharge pipe the same amount and/or percentage of time during operation) and optionally generates an alarm at step 660 and then completes the calculation cycle at step 670.
If at step 610 the station analysis auto-select mode is enabled, then at step 620 the controller 510 runs a plurality of calculations using a plurality of station analyses (e.g., a subset of available station analyses selected by the user and/or available based on whether a given station analysis has been calibrated) in order to generate one or more products. Each calculation of step 610 optionally generates an estimated amount of waste (e.g., product discharged to Waste) associated with each station analysis. At step 621, the controller 510 selects the highest-yield station analysis (e.g., the station analysis generating the least amount of waste).
At step 622, the controller 510 determines (e.g., estimates, predicts, etc.) whether the product resulting from the currently selected station analysis would result in a product within specification (e.g., a desired and/or preselected specification stored in memory). In some embodiments, the specification consulted at step 622 optionally does not include (e.g., directly include) the fineness modulus of the product. If at step 622 the product is not in specification, then at step 630 the controller determines if the referenced station analysis is the last available station analysis. If not, then at step 631 the controller 510 selects the next highest-yield station analysis and then repeats step 622 with the newly selected station analysis. If at step 630 the selected station analysis is the last available station analysis, then the controller retains the controller settings and optionally generates an alarm at step 660 and then completes the calculation cycle at step 670.
If at step 622 the product is within specification, the resulting selected station analysis may be described as the optimal station analysis, e.g., station analysis generating the highest yield of one or more products (and/or generating the lowest amount of waste) for which the product is within specification.
If at step 622 the product is within specification, then at step 623 the controller 510 optionally determines whether a fineness modulus range-and-hold mode is enabled. If not, then the controller 510 completes the calculation cycle at step 670.
If at step 623 the fineness modulus range-and-hold mode is enabled, then at step 624 the controller 510 optionally determines (e.g., estimates, predicts, etc.) whether the fineness modulus (FM) of the product is within a range defined by a fineness modulus specification. The FM of the product may be defined as the cumulative percentage (divided by 100) of product that would be retained on a series of sieves. If the FM is within specification, then the controller 510 completes the calculation cycle at step 670.
If at step 624 the FM is not within specification, then at step 625 the controller 510 optionally determines whether the referenced station analysis is the last available station analysis. If not, then at step 626 the controller optionally selects the next highest-yield station analysis then returns to step 624.
If at step 625 the referenced station analysis is the last available station analysis, then at step 627 the controller 510 determines whether an FM range bypass mode is enabled. If not, then at step 642 the controller 510 optionally retains the controller settings and optionally generates an alarm before finishing the calculation cycle at step 670. If at step 627 the FM range bypass is enabled, then at step 641 the controller 510 selects the highest-yield station analysis that results in a product within the non-FM specification and finishes the calculation cycle at step 670.
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If at step 730 the FM is not within the specification, then at step 740 the controller 510 determines whether the FM is high or low. If the FM is high, then at step 750 the controller makes an operational adjustment (e.g., iterative operational adjustment) to a station on the “coarse” side of the classifier (e.g., the station nearest to the inlet side of the classifier tank) and then determines again if the FM is within the specification. If the FM is high, then at step 750 the controller makes an operational adjustment (e.g., iterative operational adjustment) to a station on the “coarse” side of the classifier (e.g., the station nearest to the inlet side of the classifier tank) and then determines again if the FM is within the specification. Once the FM is within specification, the controller completes the calculation cycle at step 770.
In some embodiments, execution of the process embodiments disclosed herein (e.g., processes 600, 700, etc.) results in the actuation of one or more actuators 520 in order to open one or more discharge pipes 27. In some embodiments, one or more discharge pipes 27 are opened and/or closed (e.g., by actuation of one or more actuators 520) based on the outcome of the process embodiments described herein. In some embodiments, an actuator 520 is actuated at a different time or a different length of time due to the execution of one or more processes described herein. In some embodiments, a discharge pipe 27 is open at a different time or a different length of time due to the execution of one or more processes described herein.
It should be appreciated that the controller 510 described herein could comprise one or more computing device. For example, the controller 510 could comprise a user interface on a first device in communication with a second computing device used to perform one or more calculations.
Although various embodiments have been described above, the details and features of the disclosed embodiments are not intended to be limiting, as many variations and modifications will be readily apparent to those of skill in the art. Accordingly, the scope of the present disclosure is intended to be interpreted broadly and to include all variations and modifications within the scope and spirit of the appended claims and their equivalents. For example, any feature described for one embodiment may be used in any other embodiment.
Number | Date | Country | |
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62676517 | May 2018 | US |