F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
103/156
F04D 1/12 (2006.01)
Patent
CA 1264126
DUAL VOLUTE MOLTEN METAL PUMP AND SELECTIVE OUTLET DISCRIMINATING MEANS ABSTRACT This invention relates to improvements in molten metal pumps for the transfer of principally molten aluminum and zinc from specialized molten and holding furnaces through fluidics control means downstream of the pump to control the direction of flow of molten metals at 1200° - 1600° tempera- tures. The molten metal pump is characterized by both upper and lower dual volute pumps driven by the same shaft, each having separated intake filtering means adjacent the top and bottom of the pump unit. Separated and extended molten metal intake means permit molten metal flow from a submerged environment through restricted peripheral ingress slots both about the top and bottom and into both top and bottom independent voluted pump impellers, The invention permits direct use of the novel pump with aluminum metal, whose oxide impurities settle and/or zinc metal whose oxide particles float, in the molten state without pump modification. Separate dual peripheral filter ingress zones lead into separated dual volume pumps removing hard particulates suspend- ed in the melt, illustratively; spalled fire brick refractory chunks, scraps of unmelted metal and other foreign inclusions from causing excessive wear and tear or total destruction of the interior volutes and their related impellers of the pumps. The combination of the so-improved pump in cooperation with the divergent stream transition control provides an im- proved portable means of selectivity of one egress means out of two diverging exit channels through molten metal flow control means remote from the melt.
477632
Ridout & Maybee Llp
Thut Bruno H.
LandOfFree
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