| 摘要 |
A new and improved, non-porous carbon foundry sand and a method of treating a fluid coke, having a spherical or ovoid particle shape and a size suitable for a coating surface, or a core or mold surface in the foundry industry, wherein the carbon sand is processed by heating the carbon particles at a controlled rate to a temperature in the range of about 1900.degree.F to about 2300.degree.F during a period of time preferably of more than about 30 minutes, and preferably for a period of about 1 to 2 hours, particularly to about 2000.degree.F to about 2200.degree.F, and a method of casting molten metal against the heat treated carbon particles wherein the non-porous carbon foundry sand is combined with a suitable binder with which mixture a mold is formed to cast metal parts. The non-porous carbon sand also is useful in forming molds, cores, shell molds and shell cores and otherwise in using the carbon sand to replace other molding and core-making sands used in the foundry industry.
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