| 摘要 |
FIELD: construction materials industry; methods and devices for melting of rocks. ^ SUBSTANCE: the invention is pertaining to the field of the construction materials industry, in particular, to the methods of the melting devices for production of melts out of rocks. The technical result of the stated invention is the increased efficiency of the melting of rocks by intensification of the heat-exchange due to creation in the smelting zone of the developed heat exchange surface and usage of the heat of the out-coming flue gases, and also the increased reliability of the device due to the increased heat resistance of the fluxes. The method of the melting of the rocks includes the charging of the fine-layer rock material in the form of the lumpy bulk, the shock-jet heating of the material by the high-speed burners, smelting and the continuous gravitational withdrawal of the melt. At that the material before charging at its constant stirring is heated up by the flue gases outgoing from the smelting furnace through the effluent gasses annular channel up to the temperature of 100-150°C below temperature of its softening. The fine-layered material charging is conducted uniformly and simultaneously along the whole length and width of the smelting furnace made in the form of a segment of the annular channel by directing the material to the apex of the distributing member, which has been made with the conic outer surface transferring into the cylindrical surface. Withdrawal of the liquid melt from the smelting furnace is exercised into the accumulating chamber, and the high-speed sprays of the products of combustion are routed from the sides of the melting furnace walls and the accumulating chamber at an angle to the furnace heath. The stirring of the material is exercised in the chamber for heating the material, which is made in the form of the rotating cylindrical drum. The high-speed sprays of the combustion products are directed at the angle of 25-35° to the heath of the furnace with the exhaust velocity at the section of the nozzle - 150-200 m/s, the smelting of the material is exercised at the temperature of 1200-1400°C, and the overheating of the melt is exercised at the temperature of 1500-1600°C. The device for melting of rocks has the charging window made out of the refractory concrete, the smelting furnace made in the form of a segment of an annular channel and supplied with a suspended furnace roof, the walls and the slant two sloping heath, the high-speed burners mounted in the walls of the smelting furnace at an angle of 25-35° to the heath. The device contains the charging chamber made in the form of a segment of the hollow cylinder and having the distributing member, the outer surface of which is made in the form of the conical surface transferring into the cylindrical surface. ^ EFFECT: the invention ensures the increased efficiency of the melting of rocks, intensification of the heat-exchange and the increased reliability of the device due to the increased heat resistance of the fluxes. ^ 9 cl, 4 dwg |
