Method of and arrangement for dressing moist raw materials with solid undesired inclusions

Claim 1

IN COMBINATION WITH THE BURNING OF DRIED MATERIAL IN A KILN, ESPECIALLY FOR PRODUCING CEMENT, IRON ORE SINTER AND SWELLING CLAY, AN ARRANGEMENT FOR DRESSING IN A DRY PROCESS MOIST RAW MATERIAL CONTAINING UNDESIRED SOLID INCLUSION, ESPECIALY STONES; A ROTARY KILN, PREHEATING MEANS COMPRISING A PLURALITY OF SERIALLY CONNECTED STAGES ADAPTED TO RECEIVE DRIED RAW MATERIAL TO BE PREHEATED PRIOR TO BEING CHARGED INTO AND BURNED IN SAID KILN, FIRST CONDUIT MEANS LEADING FROM SAID KILN SERIALLY THROUGH THE STAGES OF SAID PREHEATING MEANS FOR CONVEYING FLUE GASES TO SAID PREHEATING MEANS, ROTARY DRYER MEANS ADAPTED TO RECEIVE MOIST RAW MATERIAL TO BE DRESSED, SECOND CONDUIT MEANS LEADING FROM THE INDIVIDUAL STAGES OF SAID PREHEATING MEANS TO SAID ROTARY MEANS TO CONVEY FLUE GASES PASSED THROUGH THE RESPECTIVE STAGES OF SAID PREHEATING MEANS INTO