SILICON POTASSIUM BINARY COMPOUND FERTILIZER AND PREPARATION METHOD THEREOF

摘要

A silicon potassium binary compound fertilizer is composed of silicon dioxide 50-55, potassium oxide 2-5, sodium oxide 30-40 and water 3-5 in parts by weight. The method for preparing the compound fertilizer comprises mixing sodium oxide, silicon dioxide and water, heating at 60-800C, and then adding potassium oxide, stirring to obtain a mixture; spraying and drying the mixture at inlet temperature of 260-400°C and outlet temperature of 100-160°C; granulating to obtain granular silicon potassium compound fertilizer. The compound fertilizer has high utilization rate and fertility, and can improve soil quality, avoid soil pollution and ensure the quality of foodstuff.