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US 6,638,433 B2Granted
System and method for controlling water-only cyclones
AssigneeSedgman, LLC
InventorsLarry A. Watters, Daniel S. Placha
Life of this patent
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AssigneeSedgman, LLC
InventorsLarry A. Watters, Daniel S. Placha
Estimating the term…
A system for controlling the operation and performance of water-only cyclones used in coal preparation plants for separating a fine raw coal slurry into fine coal and fine refuse slurries includes a variable speed pump for feeding the slurry from an underpan of a deslime screen to a water-only cyclone. A nuclear density gauge measures the specific gravity of the slurry feeding the cyclones and generates a signal used to control the addition of water. A level sensor measures the level of the fine raw coal slurry in the underpan. A pressure sensor measures the pressure of the fine raw coal slurry pumped to the water-only cyclone. A speed control device uses signals from the level and pressure sensors to control the speed of the pump in order to maintain an appropriate level of slurry in the underpan, and an appropriate feed pressure to the water-only cyclone.
In a mineral preparation plant receiving a raw mineral feed and separating the raw mineral feed into coarse and fine sized raw mineral fractions, the fine sized raw mineral fraction received as a fine raw mineral slurry at an underpan of a deslime screen and pumped from the underpan to a water-only cyclone for processing, a system for controlling water-only cyclone performance, said system comprising:
In a mineral preparation plant receiving a raw mineral feed and separating the raw mineral feed into coarse and fine sized raw mineral fractions, the fine sized raw mineral fraction received as a fine raw mineral slurry at an underpan of a deslime screen and pumped from the underpan to a water-only cyclone for processing, a system for controlling water-only cyclone performance, said system comprising:
In a mineral preparation plant receiving a raw mineral feed and separating the raw mineral feed into coarse and fine sized raw mineral fractions, the fine sized raw mineral fraction received as a fine raw mineral slurry at an underpan of a deslime screen and pumped, by a variable speed pump, from the underpan to a water-only cyclone for processing, a method for controlling water-only cyclone performance, said method comprising the steps of:
Dependencies are inferred from the claim text.