Method for sealing of gaps in a contact shoe ring and sealing arrangement
AssigneeOutotec (Finland) Oy
InventorsJanne OLLILA, Tapio KERANEN
Life of this patent
Estimating the term…
Abstract
A method and sealing arrangement for sealing of gaps in a contact shoe ring. The sealing arrangement comprises a refractory fabric which is folded to a substantially U-form shape having a first branch portion attached with refractory glue to the first side edge of the first contact shoe element and a second branch portion attached with refractory glue to the second side edge of the second contact shoe element. At least one refractory felt strip is arranged between the first and second branch portions to fill the space therebetween. A cover strip made of refractory fabric is attached with refractory glue to the side faces of the first and second contact shoe element.
Claims8
A method for sealing of gaps in a contact shoe ring, said contact shoe ring being a subassembly of an electrode lower column assembly of an electrode system of an electric arc furnace, said electrode lower column assembly comprising said contact shoe ring and a pressure ring which surrounds the contact shoe ring, and said contact shoe ring comprising contact shoe elements, each having a first side edge, a second side edge which is substantially parallel with the first side edge, and a side face at the outer periphery facing the pressure ring, each of said gaps being a space between the first side edge of a first contact shoe element and the second side edge of a second contact shoe element which is adjacently neighboring to the first contact shoe element, wherein the method comprises the steps of
- folding a refractory fabric to a substantially U-form shape to form a first branch portion and second branch portion which is parallel and at a distance corresponding to the width of the gap in relation to the first branch portion,
- attaching the first branch portion with a refractory glue to the first side edge of the first contact shoe element,
- attaching the second branch portion with a refractory glue to the second side edge of the second contact shoe element,
- inserting at least one refractory felt strip between the first and second branch portions to fill the space therebetween, and
- attaching a cover strip made of refractory fabric with a refractory glue to the side faces of the first and second contact shoe elements.
A sealing arrangement for sealing of gaps in a contact shoe ring, said contact shoe ring being a subassembly of an electrode lower column assembly of an electrode system of an electric arc furnace, said electrode lower column assembly comprising said contact shoe ring and a pressure ring which surrounds the contact shoe ring, and said contact shoe ring comprising contact shoe elements, each having a first side edge, a second side edge which is substantially parallel with the first side edge, and a side face at the outer periphery facing the pressure ring, each of said gaps being a space between the first side edge of a first contact shoe element and the second side edge of a second contact shoe element which is adjacently neighboring to the first contact shoe element, wherein the sealing arrangement comprises
- a refractory fabric which is folded to a substantially U-form shape having a first branch portion attached with refractory glue to the first side edge of the first contact shoe element and a second branch portion attached with refractory glue to the second side edge of the second contact shoe element,
- at least one refractory felt strip which is arranged between the first and second branch portions to fill the space therebetween, and
- a cover strip made of refractory fabric attached with refractory glue to the side faces of the first and second contact shoe element.
Dependencies are inferred from the claim text.