Production method of urea sulfuric acid multi-nutrient functional compound fertilizer

• Main Authors: LI DIPING, HOU CUIHONG, XU XIUCHENG, WANG HAOBIN, MIAO JUNYAN, ZHANG BAOLIN
• Format: Patent
• Language: Chinese; English
• Published: 05.06.2013
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a production method of a urea sulfuric acid multi-nutrient functional compound fertilizer. The method comprises the following steps of: preparing a urea-formaldehyde condensate solution, preparing a urea sulfuric acid solution, preparing urea-sulfur-phosphorus slurry, preparing a granular fertilizer and the like. According to the production method disclosed by the invention, medium and low-grade phosphorus ore is taken as a main phosphorous source for producing the compound fertilizer so as to be conductive to sustainable utilization and protection of phosphorous sources in China; urea-formaldehyde is used for providing part of slow-action nitrogen, and a calcium-magnesium-phosphorous fertilizer and the like are used for providing long-action phosphorous and potassium so as to improve the utilization rate of nutrients in the fertilizer, simultaneously provide various trace nutritional elements and improve the anti-lodging and anti-disease ability of crops; and a surfactant and the lik