4results about How to "Improve calcination effect" patented technology

The utility model discloses a variable-diameter electromagnetic heating rotary kiln, which belongs to the technical field of rotary kiln heating, comprises a kiln body, a heating part is provided with a charging barrel extending axially, and an electromagnetic heating coil rack is rotatably connected and sleeved on the outer side of the charging barrel, and is characterized in that an electromagnetic heating coil is formed by combining a preset number of independent electromagnetic heating coil units; the independent electromagnetic heating coil unit comprises an electromagnetic heating coil rack and an electromagnetic heating coil; the charging barrel comprises a heating tube pass and a heat preservation tube pass; the rotary kiln has the advantages that the inner diameter of the charging barrel of the heat preservation tube pass is larger than that of the charging barrel of the heat preservation tube pass, on the premise that the occupied area is not increased, the calcination time of materials in the rotary kiln is prolonged, and the calcination capacity is improved; and the lifting plate ensures that enough calcining time is reserved for the materials in the rotary kiln under the condition that the materials are turned over, so that the materials are more uniform.

The invention belongs to the technical field of material science and engineering, and discloses calcining equipment for preparing high-purity tantalum oxide, which comprises a workbench, a fluotantalic acid solution produced by a tantalum-niobium liquid-liquid extraction method is used as a raw material, ammonia water and ammonia gas are used for neutralizing and precipitating, and the high-purity tantalum oxide is prepared by controlling different factors such as ammonia water concentration, tantalum liquid concentration, ammonia flushing speed and neutralizing temperature. Tantalum oxide particles are produced, then the produced tantalum oxide particles are poured into the spherical shell, the calcining crucible is started, heat conduction is conducted on the tantalum oxide particles in the spherical shell through temperature rising of the calcining crucible, and therefore the tantalum oxide particles are calcined, meanwhile, the motor is driven, and the motor drives the rotating shaft and the spherical shell to rotate; in the rotating process of the spherical shell, the tantalum oxide particles can be subjected to rolling heating at the bottom of the inner wall of the spherical shell, the calcining effect on the tantalum oxide particles is improved, the tantalum oxide particles can be heated more uniformly, the conversion efficiency of the tantalum oxide particles can be increased, and the surface structure of the particles can be optimized.

This invention discloses a system for producing ammonium sulfite using electrolytic manganese ammonium sulfate double salt. The system includes a drum high-temperature drying device. The electrolytic manganese ammonium sulfate mixture output from the drum high-temperature drying device is fed into a crushing device via an elevator. The electrolytic manganese ammonium sulfate mixture output from the crushing device is fed into an anaerobic calcining furnace. A three-stage electrostatic precipitator is connected to the rear end of the anaerobic calcining furnace. The exhaust gas, after dust removal by the three-stage electrostatic precipitator, is sent to a multi-stage absorption and conversion tower via an exhaust gas pipeline. The conversion liquid and the completed absorption liquid after passing through the multi-stage absorption and conversion tower are sent to an evaporation device. This system and method for producing ammonium sulfite using electrolytic manganese ammonium sulfate double salt improves the calcination effect through pretreatment such as drying and crushing, and ultimately converts the ammonium sulfate into sulfur dioxide through anaerobic calcination to prepare ammonium sulfite. The difference lies in the direct blending and calcination method used in domestic and international processes.

This application discloses a high-temperature ceramsite aggregate mixing and calcining device, comprising a calcining box with an opening at the top for high-temperature ceramsite and phosphogypsum to enter, the opening having an opening and closing gate; an outlet at the bottom of the calcining box with an outlet opening and closing gate; a filter element located at the outlet and near the outlet opening and closing gate, allowing phosphogypsum to pass through; and a vibration device located on the side wall of the calcining box for vibrating the calcining box. By incorporating the vibration device and filter element, this application enables phosphogypsum to fully fill the gaps between the ceramsite and achieve efficient mixing and calcination, significantly improving heat utilization and calcination effect. Furthermore, the vibration device can effectively separate phosphogypsum and ceramsite.