Ningxia elu-edu anthracite (pụrụiche ala ash, obere sọlfọ, obere phosphorus, elu ofu carbon, elu calorific uru) na-calcined na 1200 ℃, na ike ọxịdashọn nguzogide, elu n'ibu ike, elu chemical ọrụ, elu dị ọcha coal mgbake ọnụego na ndị ọzọ. njirimara. A na-ejikarị ya eme ka carbon na-emepụta ígwè. Ọrụ ya bụ ịkwalite okpomọkụ ngwa ngwa, na-enwe mmetụta dị mma yana ọnụego nnabata carbon kwụsiri ike. Enwere ike iji ya dozie ọdịnaya carbon na ikuku oxygen nke nchara a wụrụ awụ, gbanwee isi ike ya na ike ya, wee si otú a kwalite ikike nucleation nke ígwè gbazere na àgwà nke billet dị n'ime.
