Sulfuric acid consumption in the wet phosphoric acid process
Thread Content
How much sulfuric acid is required to produce one ton of phosphoric acid in the wet phosphoric acid process? Thank you
There are many factors that influence the consumption of sulfuric acid in the production of wet-process phosphoric acid, such as the impurity content in the ore and the level of operational control. You can refer to the material balance calculations for wet-process phosphoric acid outlined in the \"Technical Manual on Phosphoric Acid, Ammonium Phosphate, and Calcium Carbonate\", which is available in the resource sharing section dedicated to compound fertilizers and functional fertilizers; you can download it there.
In domestic production of wet phosphoric acid, the dihydrate method is generally used, and it can be divided into two categories, with slight differences in consumption. The concentrated acid method is usually used in conjunction with monoammonium phosphate or diammonium phosphate, or calcium carbonate; the sulfuric acid consumption in this case is 2.8 tons per ton of P2O5. The dilute acid method is typically used for the production of calcium hydrogen phosphate, and due to the presence of sulfur-based processes, the sulfuric acid consumption is 2.4 tons per ton of P2O5.
A phosphate production plant with an annual output of 300,000 tons is accompanied by a sulfuric acid plant with an output of 800,000 tons; this is what is commonly referred to as the “836” project. Later on, the annual production of ammonium phosphate will be 600,000 tons.
This post was last edited by pengshujie on 2010-7-7 at 10:16. Reply to 4# lvni0921: Hello, does your company manufacture sulfuric acid itself or do you purchase it from other manufacturers? Among the production of sulfuric acid, the production of phosphoric acid, and the production of ammonium phosphate, which is the most complex and which is the simplest? Thank you!
Most of the sulfuric acid produced by our company is manufactured in-house; we are capable of producing it both from pyrite and from sulfur. Different production processes have their own characteristics, so it’s not possible to simply say which one is more complex and which one is simpler.
The theoretical consumption of sulfuric acid can be calculated based on the comprehensive analysis results of the ore; feel free to contact me at asp08@163.com if needed.
What was said upstairs is correct – different minerals require different amounts of acid, so it’s not possible to make generalizations. . . . . . . . . . . . . . . . .
Yes, some mines consume a high amount of sulfuric acid while others use less. We generally calculate it based on the finished product; for example, one ton of ammonium phosphate (54%) requires 1.34 tons of sulfuric acid (98%).
Reply to 5# pengshujie: Do you have such a large capacity for receiving shipments from outside? Everything is produced internally. Phosphoric acid requires lower maintenance costs compared to sulfuric acid; the control standards for phosphoric acid are quite strict, and there is significant leakage. Ammonium phosphate is relatively simpler to handle
All the posters’ comments are excellent and have been of great help to the projects I’m working on. Thank you to all of you