Phosphoric acid is an inorganic acid, a medium-strong acid, mainly used as an intermediate product in the production of fertilizer industry. It can be used in the production of chemical fertilizers, industrial phosphates, feed-grade phosphates, pharmaceutical phosphates, food phosphoric acid and electronic-grade phosphoric acid. Phosphoric acid produces a large amount of wastewater during the production process. The high-concentration phosphoric acid in the wastewater needs to be extracted and recovered for purification. The commonly used treatment methods are chemical precipitation, coagulation precipitation, adsorption, etc. However, these methods often have high investment costs and the removal effect is not very good. Therefore, solvent extraction is now used. The following example is an example:
Phosphoric Acid Solution Details
Composition: Strong acid corrosive solution, viscous
Phosphoric acid + sulfuric acid = 4:1 (phosphoric acid 85% + sulfuric acid 98%)
Aluminum ion: 15-25G/L, water: 5-8%, specific gravity: 1.69
Cleaning water solution: total acid 15%, specific gravity 1.1-1.2, aluminum ion concentration 5-6g/L. The above solution concentration is 85%, and the cleaning solution concentration it produces is 15-20%, phosphoric acid accounts for 10%, sulfuric acid accounts for 5%, and the total amount of cleaning solution is 20-30 tons per day (15% concentration).
Purpose: To remove 60-70% of aluminum ions, so that the solution can be regenerated and recycled. It can also be removed multiple times, and the separation is sufficient as long as the aluminum ions can be removed and the phosphoric acid is not destroyed or lost excessively.
The above waste phosphoric acid solution can be treated by solvent extraction, and the equipment that can be selected is CWL-M centrifugal extractor. The CWL-M series centrifugal extractor independently developed and produced by Zhengzhou Tiei Extraction Technology Co., Ltd. can be effectively applied to the purification operation of phosphoric acid.
The centrifugal extractor has an obvious effect on phosphoric acid extraction, but because the liquid conditions produced by each enterprise are different, it cannot be solved by one process. Therefore, the specific operation and process equipment details require further communication and detailed understanding. Generally, in order to ensure the use effect of the equipment, Tiei Extraction Company must conduct experiments before production, and then use industrial equipment after the experiment is successful.
If you want to learn more about the working principle and parameters of the centrifugal extractor, you can contact us, we will provide you with comprehensive technical services!
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