Slurry filtering apparatus and coating system

A slurry filtering apparatus, comprising:

• a rotating filter having an inlet and an outlet;
• and
• a gravity filter including:
• a tank including:
• a filter screen disposed within the tank dividing the tank into an upstream unfiltered region and a downstream filtered region;
• a feed port in fluid communication with the outlet of the rotating filter and the upstream unfiltered region permitting introduction of a stream flowing from the outlet of the rotating filter into the upstream unfiltered region;
• a first discharge port extending through a lower wall portion of tank and being in fluid communication with the downstream filtered region, permitting a filtered stream to exit the tank;
• and
• a second discharge port in fluid communication with the unfiltered region, permitting a stream to exit the unfiltered region of the tank without passing through the filter screen;
• wherein the feed port is elevationally above the first discharge port and elevationally below the outlet of the rotating filter thereby providing a pressure head sufficient for slurry to flow through the filter screen and the resultant filtered stream to flow through the first discharge port, and to a coating apparatus, all by gravity.