VIENNA, April 1 (Reuters) - Vienna-based fireproof

materials maker RHI Magnesita ( RMGNF ) said it plans to acquire

Resco Group, a U.S.-based producer of alumina monolithics and

refractories for an enterprise value of up to $430 million.

RHI Magnesita ( RMGNF ) said in a statement the acquisition would

continue its growth in alumina-based refractories by providing

U.S. customers with an improved product offering.

(Writing by Dave Graham;

Editing by Alison Williams)