| 摘要 |
FIELD: technological processes; chemistry. ^ SUBSTANCE: invention may be used for preparation of mud fluids, adsorbents and carriers, for catalysts on the basis of clays, for purification of oil products, oils, juices, and also in other areas of gel powder application. Method of gel powders preparation from bentonitic, palygorskite or kaolin clay includes preparation of clay raw materials until preset humidity and size, preliminary grinding, after which raw materials are averaged out by size of not more than 15 mm. Then drying is carried out in horizontally installed cylindrical drying drum in rotation mode and direct-flow motion of coolant flow. Drying is performed in coolant flow, which arrives with velocity of not more than 800 m3/hr, and temperature at the inlet and outlet of drying drum accordingly 140-150C and 60-70C with volume of raw materials supply of not more than 4-6 t/hr. Drying drum is used with length that provides temperature drop of 2.8-3.0C/m by length. Prepared product with humidity of at least 9-10% is subjected to crushing till grain size of not more than 5 mm, powder is sifted with grain size of not more than 2.6 mm and subjected to disintegration at high-speed disintegrator with its averaging till thinness of finished product grind by means of additional grinding, and residue after sifting is subjected to additional three-stage crushing to obtain thinness of finished product grind. Process line is also suggested for method implementation. ^ EFFECT: increase of process efficiency and production of gel powders with high quality. ^ 8 cl, 1 tbl, 2 ex, 1 dwg |
