A waste gas recirculation system in the process of making pellets from phosphorus coal

Abstract

The invention provides a waste gas recirculation system in the process of making phosphorus coal balls, which belongs to the technical field of chemical industry. It includes a machine base, an extrusion barrel, a scraping drum and a gear motor. An outer shield is fixed at the lower end of the extrusion barrel. The scraping drum is connected to the output shaft of the deceleration motor, and the shell of the deceleration motor is fixed on the outer shield. There are several scrapers evenly arranged on the outer wall of the scraping drum in the circumferential direction, and a return pipe is fixed on the output shaft of the gear motor. The hollow rotating drum is connected with the return pipe, the hollow rotating drum is connected with a ventilation pipe, the ventilation pipe is communicated with the top of the outer shield, and the bottom of the scraping drum is provided with overflow holes corresponding to each material trough one by one. The upper end of the material trough is communicated with the top of the outer shield, and a blower for blowing the hot air in the outer shield into the heating chamber is arranged on the ventilation pipe. The present invention has the advantages of being able to avoid the outflow of exhaust gas and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a waste gas recirculation system in the process of making pellets from phosphorus coal. Background technique [0002] Yellow phosphorus is an important basic industrial raw material, mainly used in the preparation of phosphoric acid, phosphide, phosphate, etc., widely used in fertilizer, feed industry, food processing industry, construction industry, medicine, electronics industry and many other fields. [0003] At present, the main method of industrial production of yellow phosphorus is the electric furnace method, that is, phosphate rock, silica, and coke are placed in an electric furnace according to a certain proportion and particle size, and a reduction reaction occurs at a high temperature of 1400 ° C, and the phosphorus vapor is cooled and washed together with the furnace dust. Finally, the yellow phosphorus product is obtained. Phosphate rock, silica, coke and wate...

AI Technical Summary

Problems solved by technology

[0003] At present, the main method of industrial production of yellow phosphorus is the electric furnace method, that is, phosphate rock, silica, and coke are placed in an electric furnace according to a certain proportion and particle size, and a reduction reaction occurs at a high temperature of 1400 ° C, and the phosphorus vapor is cooled and washed together with the furnace dust. Finally, the yellow phosphorus product is obtained. Phosphate rock, silica, coke and water are mixed in a certain proportion to make a spherical blank, and then put into an electric furnace for sintering. In order to make the blank into a ball, a certain amount of water needs to be added to make each The mixture is bonded, but before the billet is fired in the discharge link of the ball making process and placed in the electric furnace, it will be bonded to each other under the action of extrusion and weighing, so that it cannot fully react or react poorly during the sintering process. In general, the original purpose of ball making is to free up intergranular gaps during the sintering process to facilitate uniform heating and sufficient reaction. However, due to the mutual bonding caused by the mutual extrusion of the blanks, the reaction efficiency and heat utilization rate are greatly reduced.

Images