Agricultural composite phosphate fertilizer and preparation method thereof

• Main Authors: TANIHO, YE BEIHONG, ZHENG JIANGUO, LIANG YUXIANG, GU DAXI, LONG JIAN, YI MEIGUI, YANG XINYA
• Format: Patent
• Language: Chinese; English
• Published: 19.03.2024
• Subjects: CHEMISTRY; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; MANUFACTURE THEREOF; METALLURGY; MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENTSUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVINGA SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES,SOIL-CONDITIONERS, WETTING AGENTS; ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE

The invention discloses an agricultural compound phosphate fertilizer and a preparation method thereof, and relates to the technical field of fertilizers. Extraction slurry obtained through extraction and crystal growing in the wet-process phosphoric acid technology is subjected to ultra-aeration air flotation, ultra-aeration microbubbles are introduced into the extraction slurry through the ultra-aeration air flotation, air flotation layer slurry and residual flotation layer slurry are obtained after classification, the air flotation layer slurry serves as a base material, and the residual flotation layer slurry serves as a base material. The agricultural composite phosphate fertilizer is obtained by directly mixing the phosphogypsum waste with straw, coal slime, layered silicate, phosphorite and a straw fast-rotting fungicide without filtration, the phosphorite can be low-grade phosphorite, the purpose of comprehensively utilizing the phosphogypsum waste and low-grade mineral products is achieved, and the t