Is it feasible to burn ferrous sulfate in the production of acid from pyrite?
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In an acid production system using pyrite as raw material, it is theoretically feasible to incorporate ferrous sulfate into the combustion process; what is the actual proportion of addition? For example, if the sulfur content is 25%, how much ferrous sulfate can be added? Discussions are welcome. In my opinion, since the decomposition of ferrous sulfate is an endothermic reaction and it contains a large amount of crystalline water, the temperature in the furnace drops, the amount of dilute acid increases, and thus the power generation decreases. I would appreciate your advice.
The decomposition of ferrous sulfate heptahydrate requires a significant amount of heat from the outside; when it is converted into ferrous sulfate monohydrate, the amount of heat required **increases – generally 20% is needed for the heptahydrate form, while 50% is required for the monohydrate form
Actual production is feasible; the sulfur content in your ore blend cannot be too low
Reply to 3# Pfz2867: Laocheng is undergoing trial firing; in my opinion, the moisture and sulfur levels haven’t been adjusted properly
Reply to 2# renyi7552: Adding 20% of water increases the total moisture content in the ore by about 2%, and the temperature drops significantly; it’s already quite difficult to add 10% water. What would the costs and actual expenses be to turn it into 1-water? Adding 50% more sulfur means a significant increase in costs
Theoretically feasible, but in practice it has little economic value due to environmental pressures
Producing ferrous sulfate heptahydrate in production is feasible both theoretically and in practice, though the amount used should not be excessive; taking all factors into account, it is generally kept below 15%.
Burning ferrous sulfate heptahydrate is theoretically and practically feasible, but the amount used cannot be excessive; taking all factors into account, the sulfur content should generally be below 5-15%, while the value for S should be between 25-35.
Producing ferrous sulfate heptahydrate in production is feasible both theoretically and in practice, though the amount used should not be excessive; taking all factors into account, it is generally kept below 15%.
Our plant carries out co-firing, and the proportion of co-fired material can reach over 20%; in particular, co-firing it with coal-containing pyrite not only increases the iron content in the slag dust but also lowers the furnace temperature.
With 20% blending, the overall moisture content increases by only about 2%. I’m a bit confused; please advise! ! Based on a total amount of 100 tons, 20% ferrous sulfate heptahydrate contains 9 tons of water, and this alone results in a moisture content of around 9%. So, in my opinion, it should be doubled or so.