Hello, my name is Nick Sirois and I am an application/sales engineer for Lawrence Pumps, Inc. At LPI we engineer centrifugal pumps for abrasvie services and the information you have provided falls right in our are of expertise. We regularly manufacture vertical cantilever, line shaft bearing, and submersible pumps for water/coke fine applications such as the Maze Sump in a coker. If you would like to contact me to discuss this application in more detail I would be glad to make myself available. You can reeach me at nsirois@lawrencepumps.com or (978) 722-6296.