Discussion on whether sulfuric acid is consumed in the extraction of iron, aluminum, and magnesium impurities from phosphate ore
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For the production of feed-grade calcium hydrogen phosphate, theoretically, about 1.75 units of sulfuric acid are required per unit of calcium oxide; magnesium oxide requires a small amount of acid. Theoretically, when calculating the amount of acid needed for the ore, iron oxide and aluminum oxide should not be considered as sources that consume acid – is this correct?
It will definitely be consumed; what are the levels of calcium, magnesium, and aluminum? Generally, the MgO content should not exceed 2.5%
In the description of the phosphatic ammonium process, the consumption of iron, aluminum, and magnesium impurities is generally not taken into account
Reply to 3# Xiao Shoudong: If there’s an excess, it definitely needs to be calculated; please measure the content
Magnesium oxide 1.88%, iron oxide 1.79%, aluminum oxide 1.14%