For a start, contact your local slurry pump reps, they may probably give you some manuals such as Weir's (Warman) SLURRY PUMPING MANUAL or GIW's SLURRY PIPELINE DESIGN MANUAL. For the latterone, you can fill in a request on their website and they'll mail you one. For more complete and advanced knowledge, a book SLURRY TRANSPORT USING CENTRIFUGAL PUMPS, Third Edition, by K. Wilson et al. will give you excellent reference. You may have to buy this book though.