Because slurry properties vary widely and there are different types of slurry pumps that are suited to different slurry characteristics it is difficult to offer a meaningful answer to your question without more details.

What type of slurry are you dealing with (mineral or organic solids)?  What is the weight percent of solids and the solids distribution size range?  Specific gravity or solids and the carrier fluid?  What kind of performance is required (flow and pressure)?  What materials of construction are required?

Some organic slurries can be handled with a non-clog or vortex centrifugal design often used for sewage sludges.  Many mineral slurries are routinely pumped with rubber-lined or hard metal centrifugal slurry pumps.  Other slurries are best handled with  some type of positive displacement pump.

Give us some more details and we would be happy to provide more assistance.