Molten metal pump with filter
AssigneeThe Carborundum Company
InventorsLutfi H. Amra, Thomas M. Byrne, Jr., Harvey Martin, George S. Mordue, David V. Neff
Life of this patent
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Abstract
A molten metal pump includes a filter that prevents ingestion of foreign material such as dross from molten metal within which the pump is immersed. The filter is a large structure that is secured to the base of the pump surrounding the pump's inlet. The filter forms a cavity adjacent the pump's inlet. The ratio of the surface area of the filter to the inlet area of the pump is very large; the filter has a low porosity while maintaining a high flow rate for the pump.
Claims19
A molten metal pump, comprising:
- a base member, the base member having a fluid inlet;
- and
- a filter secured to the base member and defining
- a cavity therebetween, the filter completely surrounding the inlet, wherein the filter is made from bonded or sintered refractory material.
A molten metal pump, comprising:
- a base member, the base member having a bottom surface defining a circular shoulder portion and including a fluid inlet circumscribed by the shoulder portion;
- and
- a filter secured to the base member by means of a cemented connection with the shoulder portion, the filter and the bottom surface of the base member defining a cavity therebetween, the filter being formed of a bonded or sintered refractory material having a porosity within the range of about 35-38%.
A method of filtering molten metal passed through a molten metal pump having a fluid inlet, comprising the steps of:
- providing a cup-like filter of bonded or sintered refractory material having a pre-determined porosity;
- attaching the filter to the pump such that the filter surrounds the fluid inlet;
- and
- drawing molten metal through the filter into the fluid inlet.
A filter for a molten metal pump, comprising:
- a porous, refractory, cup-like member, the member being defined by a side wall and an end wall that closes the side wall, the side wall and the end wall creating a cavity.
Dependencies are inferred from the claim text.