US Patent Issued to S.A. LHOIST RECHERCHE ET DEVELOPPEMENT on July 1 for "Method for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace and furnace used" (Belgian, French Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,556, issued on July 1, was assigned to S.A. LHOIST RECHERCHE ET DEVELOPPEMENT (Ottignies-Louvain-la-Neuve, Belgium).

"Method for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace and furnace used" was invented by Ziad Habib (Linkebeek, Belgium), Olivier Van Cantfort (Woluwe-Saint Pierre, Belgium) and Tristan Cloarec (Urdo, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace including the steps of collecting a portion of the gaseous effluent discharged, in preheating mode, from the furnace shaft in a recirculating circuit, forming a...