METHOD FOR PRODUCTION OF PELLETIZED PEAT MIXTURES Russian patent published in 1994 - IPC

FIELD: production of pelletized mixtures. SUBSTANCE: method includes extraction of peat and delivery of raw material with high moisture content to plant, separate bunkerage according to moisture content, preparation of peat mixtures, pelletizing, drying to standard moisture content of 10-18%. In this case raw material with moisture content of 45-55 and 67-72% is extracted separately and stored separately, and before preparation of peat mixtures, foreign inclusions are separated by air separation, with simultaneous heating of mixture up to 70-95 C and comminution to size within 5 mm. Peat mixture is prepared by metering portions of different types of peat and additives with subsequent mixing by mixer to produce homogeneous mixture which is dried to standard moisture content and pressure molded to produce briquettes or semi-briquettes, or pelletized by extrusion with moisture content of mass determined by relation given in invention description. Produced granules after their drying to standard moisture content and cooling by air blowing to temperature close to ambient temperature are conveyed to packaging zone or to storage. Besides, added to peat mixture before its mixing, when needed are mineral fertilizers or lime materials, and heated mass is pelletized to produce granules sizing 5-25 mm in cross-section. In doing, introduced into mixture are wooden wastes ground to 5 mm in the amount of not in excess of 10% of dry mass. Granules are dried with low-potential head carrier from outside source. EFFECT: higher efficiency. 5 cl