System for automatically injecting a measured quantity of powder

Details System for automatically injecting a measured quantity of powder System for automatically injecting a measured quantity of powder

1980-04-22

1981-09-01

Rosenberg, P. D.

Metallurgical apparatus

With control means responsive to sensed condition

With means supplying a treating agent

75 60, 266216, C21B 502

Patent

active

042867746

ABSTRACT:
A system for automatically controlling the injection of powdered reagent into a pool of molten metal through a generally vertically disposed movable tubular lance includes lance manipulating means for imparting movement to the lance, convey gas control means operable in coordination with movement of the lance toward the pool of molten metal for initiating the flow of convey gas through the lance, common control means actuated in coordination with continued movement of the lance toward the pool of molten metal and effective to arrest downward movement of the lance and to initiate the flow of powdered reagent from a dispenser vessel through the lance and into the molten metal when the outlet end of the lance reaches a predetermined level, and measuring control means for sensing the injection of a predetermined quantity of powdered reagent into the molten metal for activating the common control means and thereby to cut off the flow of powdered reagent through the lance and to activate said lance manipulating means so as to lift the lance out of the molten metal and into a parked inactive position.

REFERENCES:
patent: 1598128 (1926-08-01), Gase
patent: 3689045 (1972-09-01), Coulter
patent: 3929464 (1965-12-01), Todd
patent: 3955966 (1972-05-01), Meichsner
patent: 4197116 (1980-04-01), Kolb
patent: 4212331 (1980-07-01), Benatar

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