Comparison between semi-hydrate wet-process phosphoric acid and dihydrate wet-process phosphoric acid production
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As far as is known, most wet phosphoric acid produced in China is manufactured using the dihydrate method. Companies that use the hemihydrate-dihydrate approach to produce wet phosphoric acid include Honglin Chemical Co., Ltd.; Guizhou Chuanheng employs the hemihydrate method. Are there any experts who can provide information on the consumption levels, costs associated with these two methods, as well as some key points to consider in process control?
The semi-aqueous process has high requirements for the quality of phosphate rock; otherwise, the extraction efficiency is low. The ore is dry-milled and added in the form of ore powder. The hemihydrate–dihydrate process is the same as the hemihydrate process. Red Phosphorus Company’s process relied on imported technology and failed to operate properly; after our modifications, it now functions normally while maintaining the quality of the phosphate ore. The dihydrate process is suitable for phosphorus ores of low quality.
Those who have listened to red phosphorus say that the acidity level seems to be low, and the driving rate remains not high