Hiki ke hoʻokaʻawale ʻia nā kumu waiwai gula refractory i ʻekolu mau ʻano nui: ʻO ke ʻano mua he arsenic kiʻekiʻe, kalapona, a me ke ʻano sulfur ʻano gula.I kēia ʻano, ʻoi aku ka nui o ka arsenic ma mua o 3%, ʻo ka carbon content he 1-2%, a ʻo ka sulfur content he 5-6%.Ke hoʻohana nei i ka cyan maʻamau ...
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