METHOD FOR PELLETIZING SINTERED MATERIAL HAVING DETERIORATED PELLETIZING PROPERTYS

摘要

PURPOSE:To pelletize the material into rigid manipelletes by charging ore having the description of the deterioration in pelletizing properties in which fine powder ore and water are blended into a compacting and plasticizing space, subjecting the ore to compaction kneading to bring it into a flaky shape under a prescribed vibrational force and furthermore subjecting it to rolling agglomeration under the same force. CONSTITUTION:A compacted medium is mixed to the ore such as Carol ore and fine iron ore and the compacted medium is provided with circular motion under =3kg exciting force [(g) denotes the acceleration of gravity]. In this way, the compacted medium is rotated in the direction of the same rotation to cause the relative backward motion of the surfaces between the adjacent compacted media. Then, the sintering material grains present between the adjacent compacted media are subjected to the joining operation such as compacting, shearing, rolling, squeezing, mulling and kneading. As the result, the group of the grains enters into a capillary area, which are formed into flakes having high bonding strength and are plasticized. Then, the flaky material itself is subjected to rolling by high exciting of =3g exciting force. As the result, the increase of packing density, the penetration of moisture into the surface, the adhesion by the moisture and the growth of grain size occur, by which minipellets having high strength can be obtd.