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石墨碎是将钢厂、冶炼厂、铁合金厂等厂家使用过的石墨电极回收、破碎至一定粒度的产物。该产品主要用作炼钢的增碳剂、脱氧剂、铅笔芯原料等。在出口时外销合同一般规定硫的含量应小于 0 .0 5% ,按 GB352 1标准测定方法[1 ] ,硫只能测定至 0 .5% ,允许误差 0 .0 5% ,这显然远
Graphite broken steel, smelters, ferroalloy factories and other manufacturers used graphite electrode recovery, broken to a certain size of the product. The product is mainly used as carbon steel refining agent, deoxidizer, pencil lead raw materials. When exporting the export contract, the sulfur content should be less than 0,05%. According to the determination method of GB352 1 [1], sulfur can only be measured to 0 .5% and the allowable error is 0. 0 5%