石墨电极 增碳剂
石墨电极，主要以石油焦、针状焦为原料，煤沥青作结合剂，经煅烧、配料、混捏、压型、焙烧、石墨化、机加工而制成，是在电弧炉中以电弧形式释放电能对炉料进行加热熔化的导体，根据其质量指标高低，可分为普通功率、高功率和超高功率。石墨电极主要包括普通功率石墨电极、抗氧化涂层石墨电极、高功率石墨电极以及超高功率石墨电极四类。
增碳剂可以用作铸铁增碳剂的材料很多，常用的有人造石墨、煅烧石油焦、天然石墨、焦炭、无烟煤以及用这类材料配成的混合料。它用于铸造，铸铁、铸钢，铸件会有对碳的一个要求，那么增碳剂顾名思义就是来增加铁液中的碳含量，又比如说，在熔炼中常用炉料为生铁、废钢、回炉料，生铁的碳含量高，但是却采购价格相对废钢来说是要高出一节的，所以增加废钢投放量，降低生铁投放量，加增碳剂，能起到一定的降低铸件成本的作用。
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