PRODUCTION OF PRELIMINARY DEPHOSPHORIZING AGENT

摘要

PURPOSE:To produce a granular preliminary dephosphorizing agent easily and inexpensively by sucking and removing the molten slag of soda ash refining by an ejector and adding soda ash-contg. powder to the slag in the mid-way of suction. CONSTITUTION:The aperture at the bottom end of a suction pipe 3 of an ejector type slag sucking and discharging device 1 which ejects a high-pressure gas such as air from a high-pressure gas ejection pipe 4 into a discharge pipe 2 consisting of a pipe closed at one end and branched with the pipe 3 is brought near to the molten slag 7 generated by molten iron refining by the soda ash refining agent to suck the slag. The sucked slag is removed through a suction area 8. The soda ash-contg. collected dust 6 from a powder adding pipe 5 is ejected and added to the sucked slag 7 by using a carrier gas. The solidification of the slag 7 liquid drops is thereby accelerated to prevent clogging. The granular dephosphorizing agent 12 having adequate components are efficiently formed and are recovered into a recovering boxy 11 provided with an air filter 13 and an exhauster 14 through a lead-out pipe 10 from a scattering area 9.