Method for producing silicon-calcium-magnesium-potassium fertilizer by calcining serpentine in rotary kiln

• Main Authors: YU HAIMING, MU YONG, LI BINGBO, XU XIANGYANG, WU HANYUAN, TIAN SHUFANG
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2019
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; FERTILISERS; FERTILISERS CHARACTERISED BY THEIR FORM; INORGANIC CHEMISTRY; 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

The invention discloses a method for producing silicon-calcium-magnesium-potassium fertilizer by calcining serpentine in a rotary kiln. The method comprises: 1, transporting serpentine, limestone andpotassium chloride raw materials to a cement production line, 2, preparing graphite with carbon content greater than 80% for next use in the production line, 3, adding serpentine, limestone, potassiumchloride and graphite carbon into a rotary kiln according to a mass ratio of 63%: 28%: 6%: 3%, carrying out calcining at 850-1200 DEG C and discharging the material at 900 DEG C or more, 4, grindingthe discharged materials through a clinker mill to obtain powder of 140 meshes, and magnetically selecting the discharged materials through a belt magnetic separator, wherein the selected non-magneticmaterials can be used as powder raw materials of silicon-calcium-magnesium-potassium fertilizer, 5, testing the powder raw materials and detecting the contents of CaO, SiO2, K2O and MgO and 6, afterdetection, supplying insuffic