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Questions and Answers
What is the reducing power of pyrite when oxidation of sulphur and iron is controlled to the ferric condition?
12.9
What is the reducing power of pyrite when a small amount of silica is present, leaving iron in the ferrous condition?
12.07
What is the significance of the 'working reducing power' of the ore?
It lies between the extremes of 8.6 and 12.9, determined by a specific fusion process.
How is the lead button separated from the slag after the fusion process?
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What are matte and speiss in the context of the fusion process?
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What is the ideal weight range for the lead buttons obtained after the fusion process?
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What is the reducing power of sulphur when 1 mole produces 2 moles of Pb?
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In the presence of sufficient alkaline carbonates, what does sulphur oxidize to and what does it combine with?
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What is the reducing power of sulphur when the reaction involves 3 moles of Pb?
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How does the reducing power of metallic sulphides vary according to the amount of available alkaline carbonate present?
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In the absence of alkaline carbonates, what equation expresses the reaction between iron pyrite and litharge?
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What happens when there is an entire absence of alkaline carbonate in the reaction?
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