摘要
概述了我国钾肥资源短缺和矿石制钾的研究现状,分析了采用炉内固硫的方法将钾长石粉与钙基固硫剂复合生产可溶性及枸溶性钾硅复合肥料的可能性。实验研究表明,原料在炉膛内于1 150℃下燃烧20min,其复合固硫剂的固硫率仍可达60%以上;在炉内停留60min,钾长石中钾的分解率达90%以上,炉渣中活性K2O含量高达3. 5%,活性SiO2 含量约35%。炉渣可作为钾硅复合肥料,适用于缺钾或酸性土壤的改造。
A summary is given of the shortage of potassic fertilizer resources in China and the present status of research on the manufacture of potassium from ores, and an analysis is made of the possibility of the composite production of water-soluble and citrate-soluble potassium silicon fertilizers from potash feldspar powder and calcium-based sulfur fixing agent by the furnace sulfur fixation method. The experimental study shows that when raw coal is burned in the hearth at 1 150 ℃ for 20 min, the fixing rate of the compound sulfur fixing agent is still above 60%, when the residence time in the furnace is 60 min, the decomposition of the potassium in the potash feldspar is over 90%, and the content of active K 2O in the slag is as high as 3.5%. The slag can be used as a potassium silicon compound fertilizer, suitable for amelioration of potassium-deficient or acid soils.
出处
《化肥工业》
CAS
2005年第2期38-40,50,共4页
Chemical Fertilizer Industry
基金
广东省十五重点攻关项目:B32228530
