Process of making pins for connecting carbon electrodes
AssigneeUCAR Carbon Company Inc.
InventorsRichard Liichang Shao, James William Kortovich, Irwin Charles Lewis, Richard Thomas Lewis
Life of this patent
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Abstract
A process for preparing pins for connecting carbon electrodes is presented. In particular, a process for preparing pins for connecting carbon electrodes including the steps of combining calcined coke, a liquid pitch binder and carbon fibers derived from mesophase pitch to form a pinstock blend; extruding the pinstock blend to form a green pinstock; baking the green pinstock to form a carbonized pinstock; and graphitizing the carbonized pinstock by maintaining the carbonized pinstock at a temperature of at least about 2500° C. for no more than about 18 hours is presented. The pins prepared by the inventive process are also presented.
Claims16
A process for preparing pins for connecting carbon electrodes, the process comprising
- (a) combining calcined coke, a liquid pitch binder and carbon fibers derived from mesophase pitch to form a pinstock blend;
- (b) extruding the pinstock blend to form a green pinstock;
- (c) baking the green pinstock to form a carbonized pinstock;
- and
- (d) graphitizing the carbonized pinstock by maintaining the carbonized pinstock at a temperature of at least about 2500° C. for no more than about 18 hours, to form a pin for connecting carbon electrodes.
A process for preparing pins for connecting carbon electrodes, the process comprising
- (a) combining calcined coke, a liquid pitch binder and from about 0.5 to about 5 parts by weight carbon fibers derived from mesophase pitch per 100 parts by weight of calcined coke to form a pinstock blend, the carbon fibers having a Young's modulus of no greater than about 40×106 psi;
- (b) extruding the pinstock blend to form a green pinstock;
- (c) baking the green pinstock to form a carbonized pinstock;
- and
- (d) graphitizing the carbonized pinstock, to form a pin for connecting carbon electrodes.
Dependencies are inferred from the claim text.