用含钛高炉渣制备肥料

以含钛高炉渣和硫酸铵作原料,采用加热法制备复合肥料,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出率的影响.结果表明,合成肥料的适宜工艺条件为:硫酸铵与水淬含钛高炉渣的质量比为8∶1,加热温度为320℃,恒温时间为36 min.在此条件下,水淬渣中Ti,Mg和Fe的溶出率分别为84%,88%和75%,肥料中含有氮、硅、硫、钙、镁、铁和钛等营养元素,均可被植物有效利用,其中氮、钛、镁、铁和大部分硫以水溶性物质的形式存在,可作为速效成分.

Synthesis of Fertilizer from Titanium-Bearing Blast Furnace Slag

With titanium-bearing blast furnace slag and (NH4)2SO4 as raw materials, a compound fertilizer was synthesized by heating to enhance its solubility and transforming nutritional elements into the other form available to be absorbed easily by plants. The effects of process conditions on the dissolving rate of fertilizer were investigated, and the results showed that the appropriate process conditions for the fertilizer are the mass ratio of (NH4)2SO4 to water-quenched slag is 8:1 with the reaction temperature 320°C held for 36 min. Thus, the dissolving rates of titanium, magnesium and iron in the slag are 84%, 88% and 75%, respectively. The fertilizer contains such nutritional elements as nitrogen, silicon, sulfur, calcium, magnesium, iron and titanium, which can all be absorbed to nurture plants effectively. Among them, the elements nitrogen, iron, titanium, magnesium and most of sulfur are in the form of water-soluble substances which can be used as the quick-released components.