32 UDC 622.7 Dr. Mathias Trojosky, Head F & E Process Technology, mathias.trojosky@allgaier.de Bjцrn Autenrieth, Service & After Sales Drying Technology, bjoern.autenrieth@allgaier.de Gerd Stцlzner, Plant & Equipment Design Drying Technology, gerd.stoelzner@allgaier.de ALLGAIER Process Technology GmbH PROCESSING OF LIMESTONE SCREENING DEBRIS BY MEANS OF A COMBINATION OF ROTARY DRYER AND CLEANING DRUM Мақалада әртүрлі тау жыныстарын, оның ішінде әк тастарды, қажалаушы (тазалаушы) жүйесі бар барабанды келтіргіштер туралы баяндалған. Қолданылатын технологиялар мен жабдықтар бағалы материалдардың үлесін көбейтуге мүмкіндік тудырады, ауа райы суық аймақтар үшін бұл әдіс өте тиімді болады. <...> Используемые технологии и оборудование позволяют увеличить долю ценных материалов, исключив дополнительную промывку пород, что является большим преимуществом для регионов с холодными климатическими условиями. <...> During the extraction of limestone in quarries, so-called pre-screening debris are yielded. <...> Up to 90% of this prescreened material consists of good limestone rock, which is frequently heavily interstratified with clay and loam impurities. <...> There fore, it could only be sold as a low-grade product without being cleaned correspondingly. <...> Usually wet washing processes are used, so-called rock wash ing plants known from sand and gravel processing, to remove the pollutants adherent to the limestone. <...> Then the washed materials have to be dried before further processing (crushing, screening, classifying, burning). <...> The use of rock washing plants requires an expensive sewage and sludge treatment and, only for this reason, cannot be used unproblematically everywhere. <...> The required capital spending and power for such plants, above all combined with drying, is considerable, also because the washing Обогащение полезных ископаемых Pic. 1. <...> Combination of rotary dryer and cleaning drum. <...> Горный журнал Казахстана №11’ 2016 Обогащение полезных ископаемых 33 Pic. 2. <...> Scheme of the combined dry-cleaning process. of the rock leads to the a higher water content exceeding the original rock moisture. <...> The delivery program of ALLGAIER includes a special ro tary dryer, which <...>