Unused 60" dia indirectly heated, natural gas-fired rotary calciner, manufactured by Harper. 60" (1,524 mm) ID Inconel 600 process tube with 420" (10.7 m) heated length. Variable-speed rotary tube drive, 0.2–2 RPM. 1022F max chamber temperature. (4) natural gas burners with approximately 3.0 MMBtu/hr combined heating capacity. Separate rotary cooling section with 316 SS tube, approximately, 420" (10.7 m) active cooling length, external water spray cooling, designed product discharge temperature below 122F. 480 V/3phase/60Hz, 80 amps. Approximate installed dimensions 101' L × 15' W × 28' H. Built 2022.