Ko te Roopu Hangarau mai i UrbanMines kua whakanuia te rangahau mo te tangohanga parahi mai i te para whakarewa, ka tukuna ki te whakangao. Ko te whakawhanaunga o te para i mahia epiritiwhakakorikori, hiku rewa ranei i te mahana mai i te 500 ki te 650°C, ka reihia te calcine ki te wai.Ko nga hua i whakaatu ko te nui rawa o te rewa parahi (70-73%) ka riro mai i te calcine, ka riro mai i te rua me te toru haora te whakangao i te 550 o C. He mea whiriwhiri te mahi na te mea ko te 3-5% anake o te rino ka rewa.I tua atu i te pāmahana whakangote, i kitea he painga nui ki te riihi parahi ko te pyrite/flotation tailings: ratio.Ko nga hua tino pai i tutuki ma te whakangao i te 5.00 g slag me te 2.00 g pyrite me te 3.00 g o nga hiku.
Te Whakarewa Parahi ma te taapiri
Whakatangihia te hau ka whakamahana ki te hanga rino me tepiritika eke ki te taumata hāora
2CuFeS2 + 3O2→2CuS + 2FeO + 2SO2
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Whakawerahia te calciate, te quartz me te piriti ki te 1100℃
CuS + S(i roto i te piriti)+ O2→Cu2S + SO2
I te wa e heke ana te kapu sulfide
CaCO3 + SiO2→CaSiO3 + CO2
CaSiO3 + FeO + SiO2→2(Fe,Ca)SiO3
Koia ka whakaputa i te waikura rino i konatunatua ki te ngau umu ka wehea
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Tangohia te kapu sulfide ka pupuhi ki te hau
Cu2S + O2→2Cu + SO2↑
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Mena e tika ana, mahia etahi atu hikoolytme te waikawa pungatara me te otinga kapu sulfide
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Hangarua te koura, te hiriwa me te konukawata mai i te mea poke
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Whakaorangia te mata i tangohia mai i te ore ki tetahi waahi kei runga ake i te waahi whakarewa
Ko te parahi he teitei ake te ira whakarewa ka wehe ka rewa whakarunga