以含钛高炉渣作为主要原料,采用加热法制备复合肥,以提高其溶解性能,使其中的营养元素转化为易被植物吸收利用的形式.考察了工艺条件对肥料溶解性能的影响.结果表明,合成复合肥的适宜工艺条件为:硫酸铵与含钛高炉渣的质量比为8:1,加热温度为300 ℃,恒温时间为30 min. 复合肥中含有氮、硅、硫、钙、镁、铁和钛等营养元素,其中氮、硫、镁、铁和钛以水溶性物质的形式存在;硅和钙以枸溶性物质的形式存在,均可被植物有效利用.
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