Bonded particle filters
View Patent ↗An apparatus for filtering molten metal held in a vessel before the metal enters the dosing tube. The filtering apparatus includes an attachment portion that mounts to the dosing tube, a filter body connected to the attachment portion and a planar surface attached to an end of the filter body opposite the attachment portion. The filter body can include a beveled end opposite the attachment portion where the planar surface is attached. The apparatus can be made from a bonded-particle material made from silicon carbide or aluminum oxide held together by an aluminum-resistant binder.
1. An apparatus for filtering molten metal before entering a dosing tube, the apparatus comprising a mounting portion; a filter body connected to the mounting portion, the filter body having a beveled end opposite the mounting portion; and a surface attached to and substantially covering the beveled end.
2. The apparatus of claim 1 wherein the mounting portion is dimensioned to fit around the dosing tube.
3. The apparatus of claim 1 wherein the filter body is substantially cylindrical.
4. An apparatus for filtering molten metal held in a vessel before the metal enters a dosing tube, the apparatus comprising:
an attachment portion dimensioned to attach to a dosing tube; and
a closed filtering surface area attached to and extending from the attachment portion to provide a filtering surface, the closed filtering surface area comprises a cylindrical portion having a beveled end distal the attachment portion and a planar surface attached to the beveled end.
5. The apparatus of claim 4 wherein the attachment portion is annular.
6. The apparatus of claim 1 wherein the surface attached to and substantially covering the beveled end is substantially planar.
7. The apparatus of claim 1 wherein the filter body comprises:
silicon carbide or aluminum oxide; and
an aluminum-alloy resistant binder.
8. An apparatus for filtering molten metal, the apparatus comprising:
a vessel for holding molten metal;
a dosing tube disposed in the vessel; and
a filter attached to the dosing tuber, wherein the filter includes a beveled end.
9. The apparatus of claim 8 wherein the filter is mounted onto an inlet end of the dosing tube.
10. The apparatus of claim 8 wherein the filter is cemented to the dosing tube.
11. The apparatus of claim 8 wherein the filter rests on a bottom floor of the vessel.
12. The apparatus of claim 11 wherein the beveled end rests on the bottom floor of the vessel.
13. The apparatus of claim 8 wherein the dosing tube is disposed at an angle to vertical.