Manufacture of environmentally friendly carbon-bonded refractory product in the cold mixing process
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United States of America Patent
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Aug 10, 2010
Grant Date -
Jul 12, 2007
app pub date -
Jan 11, 2005
filing date -
Jan 17, 2004
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Abstract
The invention relates to a method for manufacturing carbon-bonded refractory products from refractory granulations and organic binder agents, wherein a powdery, graphitable coal-tar pitch with a benzo[a]pyrene content less than 500 mg/kg and a coking value of at least about 80% by weight according to DIN 51905 and a graphitable binder agent liquid at room temperature, with a coking value of at least about 15% by weight and a benzo[a]pyrene content less than 500 ppm according to DIN 51905, are used as organic binder agent, mixed with the remaining constituents, transferred to a mould body, then heat treated at a temperature of 150 to about 400° C.
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