SMPI, a wholly owned subsidiary of Zemex and part of its industrial minerals division, operated a 35,000 tpa talc plant staffed by 26 employees at Van Horn, Texas, producing talc grades for ceramics, plastics, and coatings.
The facility was originally built in 1959 under The Pioneer Talc Co. In the early 1980s the plant was sold to Whittaker, Clark and Daniels and was operated...