Method of forming sealed refractory joints in metal-containment vessels, and vessels containing sealed joints
View Patent ↗An exemplary embodiment of the invention provides a method of preparing a reinforced refractory joint between refractory sections of a vessel used for containing or conveying molten metal, e.g. a metal-contacting trough. The method involves introducing a mesh body made of metal wires into a gap between metal-contacting surfaces of adjacent refractory sections of a vessel so that the mesh body is positioned beneath the metal conveying surfaces, and covering the mesh body with a layer of moldable refractory material to seal the gap between the metal-contacting surfaces. Other embodiments relate to a vessel formed by the method and a vessel section with a pre-positioned mesh body suitable for preparing a sealed joint with other such sections.
1. A method of preparing a reinforced refractory joint between refractory sections of a vessel used for containing molten metal, the method comprising: introducing a mesh body made of metal wires into a gap between molten metal-contacting surfaces of adjacent refractory sections of a molten metal containing vessel so that the mesh body is positioned beneath the molten metal-contacting surfaces and located in an enlarged groove of one of the adjacent refractory sections, and covering the mesh body with a layer of moldable refractory material to seal the gap between the molten metal-contacting surfaces.
2. The method of claim 1 , wherein a quantity of moldable refractory material is worked into the mesh body before the mesh body is introduced into the gap between the adjacent refractory sections.
3. The method of claim 1 , wherein the metal used to form the mesh body is a metal resistant to attack by molten metal.
4. The method of claim 1 , wherein the metal used to form the mesh body is a metal chosen from the group consisting of Ni—Cr based alloys, stainless steel and titanium.
5. The method of claim 1 , wherein the metal wires are woven together to form a woven metal fabric for the mesh body.
6. The method of claim 5 , wherein the woven metal fabric has mesh openings having dimensions small enough to resist penetration by the molten metal.
7. The method of claim 5 , wherein the mesh openings have a size in a range of 1 to 5 mm.
8. The method of claim 5 , wherein the mesh openings have a size in a range of 2 to 3 mm.
9. The method of claim 1 , wherein the mesh body has a plurality of layers laid one over another.
10. The method of claim 9 , wherein the layers of woven metal mesh are rolled up over each other to form a flexible elongated rope.
11. The method of claim 10 , wherein the flexible elongated rope is covered with a woven tubular sleeve made of metal wires.
12. The method of claim 11 , wherein the woven tubular sleeve has mesh openings of the same or smaller size than the mesh openings of the one or more layers.
13. The method of claim 1 , wherein the moldable refractory material is selected from the group consisting of materials made of silica/alumina and pastes containing aluminosilicate fibers.
14. The method of claim 1 , wherein the enlarged groove is formed in at least one of the refractory sections adjacent the gap, and wherein the enlarged groove is located beneath the molten metal-contacting surface.
15. The method of claim 1 , wherein the mesh body is chosen to have an uncompressed width wider than a width of the enlarged groove.
16. The method of claim 1 , wherein the vessel is shaped and dimensioned for use as a vessel selected from the group consisting of an elongated metal-contacting trough having a channel therein, a container for a molten metal filter, a container for a molten metal degasser, and a crucible.