由钢铁厂的炼铁、炼钢过程中产生的高炉煤气灰,目前几乎未被利用而废弃。然而,在高炉煤气灰中,却含有很多称之为“结集石墨”(初生石墨)或无定形碳。这里,研究的目的在于经过精制之后有无达到商品化的可能性,而对某炼铁厂高炉煤气灰进行了回收试验。试验结果表明,例如把含固定碳为40％左右的高炉煤气灰,仅通过选矿处理,便可获得含固定碳为90％的石墨精矿,进而把它用盐酸处理,则最终可获得含固定碳为98％以上的石墨精矿。 Blast furnace gas ash, which is produced by the iron and steel works in the iron and steel making process, has hardly been used and is discarded at present. However, in blast furnace gas ash, there are a lot of them called “agglomerated graphite” (nascent graphite) or amorphous carbon. Here, the purpose of the study is to purify whether there is the possibility of commercialization, and a blast furnace coal ash recycling test. The test results show that, for example, the blast furnace gas ash containing about 40% of the fixed carbon can be obtained only by beneficiation treatment, then the graphite concentrate containing 90% of the fixed carbon can be obtained, and then treated with hydrochloric acid, Carbon is more than 98% graphite concentrate.