| 摘要 |
There is described a new and improved carbon sand and a method of treating a petroleum fluid coke, having a spherical or ovoid particle shape and a size suitable for a core or mould surface in the foundry industry, by heating or roasting the carbon particles at a temperature in the range of about 1000 DEG F to about 1500 DEG F, particularly about 1200 DEG F to about 1400 DEG F, for a time sufficient to volatilize from the carbon particles substantially all of the organic contaminants volatilizable at the roasting temperature, and a method of casting molten metal against the heat treated carbon particles combined with a suitable binder, to form cast metal parts. The carbon sand is also useful in forming shell moulds or cores and can be used in any moulding and coremaking process with any binder systems. |
