AKSV24,
Depends:
If you are talking about a very litle amount with no continue pumping fluid with solids. Very litle will be less than 2 or 3% by weight, less that GE 1.02. In this case , the effect is mainly mechanically on pump. You will go with low rpm, and try to use harder materials on wear wetted components.
The other case is hydrotransport, in the case you should pumping
a large amount of solids, means 3 to 60-70% of solids by weight.
In this case , the effect is mechanically, hydraulic on pump and system. If it is the case, it better that you provide all fluid data to better understanding your question.
I hope this helps.