Anthracite nziza ya Ningxia (ivu ridasanzwe rike, sulfur nke, fosifore nke, karubone idahinduka, karubone ifite agaciro ka karori nyinshi) iterwa na calcium kuri 1200 ℃, ifite ubudahangarwa bukomeye bwo gutwika, imbaraga nyinshi za mekanike, imikorere myinshi ya shimi, igipimo cyo kugarura amakara meza n'ibindi biranga. Ikoreshwa cyane cyane mu kongera karubone mu gukora ibyuma. Inshingano zayo ni ukongera ubushyuhe vuba, hamwe n'ingaruka nziza no gukurura karubone mu buryo buhoraho. Ishobora gukoreshwa mu guhindura ingano ya karubone na ogisijeni mu byuma bishongeshejwe, guhindura ubukana bwabyo n'ubukomere bwabyo, bityo bikanoza ubushobozi bwo guteranya ibyuma bishongeshejwe n'ubwiza bw'imbere bwa billet.
