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大量镁渣不合理的排放堆积对环境造成了严重污染。为了开发利用镁渣,对镁渣作为包膜材料制备包膜肥进行了研究,包括镁渣的冷却方式、粒径和包膜机转速等因素对制备包膜肥的影响,得到制备包膜肥的最佳条件。研究表明,风冷镁渣,过180目筛,60 r·min~(-1)条件下镁渣的包膜率最大,包膜肥的崩解率最低,且包膜后的肥料抗压强度比原始肥料显著提高。镁渣包膜肥24 h养分释放率为5.45%,14 d养分释放率为74.1%。因此,镁渣作为包膜材料,能够使肥料具有很好地缓释性能和防结块能力。
A large number of magnesia discharge caused by unreasonable environmental pollution caused by the serious. In order to develop and utilize the magnesium slag, the study on the preparation of coated fertilizer with magnesium slag as coating material, including the cooling mode of magnesium slag, the particle size and the speed of the coating machine on the preparation of coated fertilizer, The best conditions. The results show that the air-cooled magnesium slag has the highest coating rate of magnesium slag and the lowest rate of disintegration of coated fertilizer under the conditions of 180 mesh sieve and 60 r · min -1, and the compressive strength Significantly higher than the original fertilizer. Magnesium slag coated fertilizer 24 h nutrient release rate was 5.45%, 14 d nutrient release rate was 74.1%. Therefore, magnesium slag as the coating material, can make the fertilizer has good slow release performance and anti-caking ability.