FIELD: metallurgy, chemical industry, civil engineering; endothermic roasting of carbonate-containing material (limestone, dolomite, magnesite, dunite). SUBSTANCE: method includes supply of air by turbo-blowers during the cycle, burning fuel in direct flow, cooling limestone in counter- flow, discharge of gaseous products from furnace and change-over of shafts; burning fuel and cooling limestone in cycle are effected in turn. Gaseous products formed in cooling the limestone are discharged through both shafts simultaneously; cooling the limestone is performed before burning fuel. EFFECT: reduction of power consumption and capital outlays. 3 cl, 3 dwg, 1 tbl
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