Process for co-producing sulfuric acid, fine iron powder and iron oxide red by ferrous sulfate heptahydrate and pyrite
A technology of ferrous sulfate and pyrite, applied in the direction of iron oxide/iron hydroxide, iron oxide, sulfur compounds, etc., can solve the problems of large amount, environmental pollution, unavailability, etc.
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[0112] The example uses the production capacity of 300,000 tons of sulfuric acid as a specific illustration
[0113] 1. The sulfuric acid output is 300,000 tons, and the sulfuric acid output per hour is 37.5 tons, wherein ferrous sulfate heptahydrate accounts for 31% of the acid production, and the consumption of 95% ferrous sulfate heptahydrate is 34 tons / hour; The iron ore burning rate is 99%, the sulfur content is 46%, and the consumption of pyrite with a moisture content of 2% is 27.15 tons / hour.
[0114] 2. The heat required to convert ferrous sulfate heptahydrate into ferrous sulfate monohydrate is 8.1×10 6 kcal / h, the heat loss in the volatilization process of steam drying or heat treatment is 10%, the heat release in the steam heating process is calculated as 563kcal / kg, the steam consumption is 15.8t / h, and the steam consumption converted into a ton of acid is 0.422t / t sulfuric acid.
[0115] 3. Mix the formed ferrous sulfate monohydrate and pyrite into the ore hopp...
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