Pre-wet and reinforced molten metal filter
OwnerDaniel E. Grotekeinventor
Life of this patent
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Abstract
The present invention relates to an improved filter element for use in an apparatus for filtering molten metal, and to the method of making such filter element. The apparatus consists of a filtering vessel fitted with a filter element. In one embodiment of the present invention the improved filter element is pre-wet with metal prior to the filtering apparatus being introduced into service. In a second embodiment of the present invention the improved filter element is reinforced with one or more reinforcing members. The improved filter element can be used in filtering vessels having a variety of designs.
Claims13
A filter element for insertion into a filtering vessel for filtering molten metal the filter element having reduced start-up time and reduced damage caused as a result of thermal shock, the filter element, comprising:
- a porous ceramic body with interconnected pores throughout, said body having a central region bounded by a peripheral edge region;
- a refractory cement filling said pores in said peripheral edge region;
- and
- a metal alloy filling the pores of said central region of said porous ceramic body to thereby reduce start-up time and damage to the filter element.
A method for pre-wetting a filter element for filtering molten metal, the filter element having reduced start-up time and reduced damage caused as a result of thermal shock, the pre-wetting comprising the steps of:
- first pre-wetting the filter element with a first metal alloy having a melting point less than a second metal alloy;
- and
- thereafter pre-wetting the filter element with said second metal alloy, said second metal alloy being compatible with the molten metal to be filtered, which thereby reduces start-up time and damage to the filter element.
Dependencies are inferred from the claim text.