发明名称 |
Process of making graphite articles |
摘要 |
<p>A new process for preparing a graphite article such as a graphite electrode or cathode is described. The process comprises (a) mixing (i) a particulate fraction comprising at least about 35 weight percent coke, coal or mixtures thereof having a diameter such that a major fraction passes through a 25 mm mesh screen but not a 0.25 mm mesh screen, and (ii) a pitch binder, to form a stock blend; (b) extruding the stock blend to form a green stock; (c) baking the green stock to form a carbonized stock; and (d) graphitizing the carbonized stock by maintaining the carbonized stock at a temperature of at least about 2500 degree C. A graphite electrode column made using the new process has sufficient strength to maintain the integrity of the graphite electrode column without use of a pin, has increased resistance to cracking and has reduced brittleness, when plural such graphite electrode columns are used to form a graphite electrode.</p> |
申请公布号 |
EP2479018(A1) |
申请公布日期 |
2012.07.25 |
申请号 |
EP20120164513 |
申请日期 |
2003.08.27 |
申请人 |
GRAFTECH INTERNATIONAL HOLDINGS INC. |
发明人 |
KORTOVICH, JAMES, WILLIAM;SHAO, RICHARD, LIICHANG;HUANG, DIA;LEWIS, IRWIN CHARLES;LEWIS, RICHARD, THOMAS |
分类号 |
B29C47/36;C01B31/04;B29C47/78;B32B;C01B31/00;C04B35/52;C04B35/532;C04B35/634;C04B35/83;C25B11/12;H05B7/085 |
主分类号 |
B29C47/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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