ʻO ka lanahu Anthracite Calcined, ʻo kāna kumu kumu he anthracite kūlana kiʻekiʻe, me ke ʻano o ka lehu haʻahaʻa a me ka sulfur haʻahaʻa. Ke hoʻohana ʻia e like me ke kalapona hoʻohui o ka hoʻoheheʻe kila, a me ka hoʻolei ʻana. Ma waho aʻe, hoʻohana nui ʻia i ka kānana wai a me ka mālama wai ma muli o kāna mau waiwai kānana maikaʻi. ʻO ka lanahu Anthracite kahi lanahu kiʻekiʻe loa i loaʻa i nā ʻāpana lanahu paʻa paʻa i hiki mai i nā ʻano nui. Hoʻohana ʻia ka Anthracite me ke one silica (dual media system) a i ʻole me ke one silica a me ka pōhaku kānana (mixed media system) a i ʻole (mono media system).
