Gold Mine Formulation
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Transcript of Gold Mine Formulation
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Calculation of the proportions of the oxidants & fluxes versus impurities present in the calcined precipitate
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Calculation of the demand for oxygen(kg oxygenates by 100 kg of precipitate)
D.O. = 0.13(%Cu) + 0.29(%Fe) + 0.077(%Pb) + 0.25(%Zn) + 0.5(%S) - 0.18(%MnO2)
The coefficients in red come from the literature
The quantity of MnO2 is function of the experiment and the losses of recovery out of precious metals (max 6-7% in Laronde).
The contents of the impurities are function of the analyses of the calcined precipitate (RASIL02) and their oxidation step (COREM).
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Calculation of the demand of Sodium Nitrate
(kg NaNO3 by 100 kg of precipitate) D.O. NaNO3 = [D.O.] x [5.31]
[% effectiveness NaNO3]
% of effectiveness varies according to: the quality of the mixture the temperature heating.
an effectiveness higher than 75% is impossible
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Calculation of the demand for silica (kg SiO2 by 100 kg of precipitate)
D.S. = 0.10(%Cu) + 0.26(%Fe) + 0.15(%Pb) + 0.23(%Zn) + 0.17(%MnO2) + 0.35(NaNO3) - 1.0(%SiO2)
The coefficients in red come from the literature
The quantity of SiO2 in the precipitate is withdrawn in calculation
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Calculation of the demand for borax (kg borax by 100 kg of precipitate)
D.B. = [0.20(%Cu) + 1.73(%Fe) + 0.39(%Pb) + 1.54(%Zn) + 1.16(%MnO2) + 0.59(NaNO3) + 1.78(%Na2CO3)]
factor mixes
The coefficients in red come from the literature
The quantity of borax can be reduced 10-30% if the power supply of the furnace is well mixed
(factor of mixture = 1 to 1,3)