Method for preparing feed calcium hydrophosphate from calcium source in phosphorite

• Main Author: Gong Jiazhu
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; FODDER; FOODS OR FOODSTUFFS; HUMAN NECESSITIES; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES

The invention comprises a method for preparing feed calcium hydrophosphate from a calcium source in phosphorite. According to the method, high-calcium low-phosphorus calcium compounds generated in the process that fluoride in phosphorite is removed through pyrolysis serve as calcium raw materials and most phosphorus raw materials for producing feed calcium hydrophosphate, defluorinated wet process phosphoric acid serves as part of raw materials and is used for producing feed calcium hydrophosphate, and calcium resources in phosphorite are fully used. The method reduces exploitation of limestone and emission of greenhouse gas carbon dioxide, raw material cost of limestone during production is reduced, and the great demand for feed calcium hydrophosphate widely required in the market is also met. The method can reduce the use amount of 60% sulfuric acid used for removing the calcium source in phosphorite for producing wet process phosphoric acid, correspondingly reduces stacking and treatment problems of phosph