Calcium superphosphate
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I would like to ask everyone: What are the reasons for the excessive level of free acid in calcium carbonate, and how can free acid in calcium carbonate be controlled?
Is the poster producing superphosphate? I would like to know about the general production process of superphosphate as well as the requirements for the raw materials used in its production Keep learning.
I wonder how much acid mine rock for producing heavy calcium carbonate you can achieve at the moment? And the composition of the ore, etc.? It’s hard to say just based on free acid; a comprehensive consideration is needed.
The original poster might want to try reducing the sulfate content in the phosphoric acid used as a raw material; we generally adjust the excess of free acid by controlling the sulfur-to-phosphorus ratio.