Not only was this smeltery not far from the mine , but it was conveniently located for transportation of vital requirements for smelting such as anthracite from chongjin , korean peninsula and limestone from kyushu by ship . この製錬所は鉱山から遠くないばかりか、製錬に必須の無煙炭を朝鮮半島の清津から、石灰岩を九州から船で輸送することが可能な便利な位置にあった。