利用钾长石尾矿制备硅钾肥试验研究  

Experimental Research on Preparation of Silicon Potassium Fertilizer from Potash Feldspar Tailings

作　　者：于俊杰 黄红军[1,2] 王盼 刘芳芳 Yu Junjie;Huang Hongjun;Wang Pan;Liu Fangfang(School of Minerals Processing and Bioengineering,Central South University,Changsha,Hu’nan 410083;Key Laboratory of Clean and Efficient Utilization of Calcium Mineral Resources in Hunan,Changsha,Hu’nan 410083)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]战略含钙矿物资源清洁高效利用湖南省重点实验室,湖南长沙410083

出　　处：《非金属矿》2021年第4期69-71,共3页Non-Metallic Mines

基　　金：战略含钙矿物资源清洁高效利用湖南省重点实验室(2018TP002)。

摘　　要：以钾长石尾矿为原料,采用焙烧工艺处理钾长石尾矿-CaSO_(4)-CaCO_(3)三元体系制备硅钾肥,以柠檬酸对硅钾肥中Si和K的浸出率作为硅钾肥肥力评价指标,确定最佳制备条件。结果表明,当n(钾长石尾矿)∶n(CaSO_(4))∶n(CaCO_(3))为1∶1∶16时,最佳焙烧温度为1000℃,焙烧时间为4 h。利用2%柠檬酸对硅钾肥浸出7 d,Si和K浸出率分别为98.4%和94.4%。本研究为钾长石尾矿制备硅钾肥的生产提供理论依据和技术指导。Potash feldspar tailings were used as raw materials,and a roasting process was used to treat potash feldspar tailings-CaSO_(4)-CaCO_(3)ternary system to prepare silicon-potassium fertilizer.The leaching rate of Si and K in silicon-potassium fertilizer by citric acid was used as the evaluation index of silicon-potassium fertilizer to determine optimal preparation conditions.The results show that when n(potassium feldspar tailings)∶n(CaSO_(4))∶n(CaCO_(3))was 1∶1∶16,the best roasting temperature was 1000℃,roasting time was 4 h,the silicon-potassium fertilizer was leached with 2%citric acid for 7 days,the leaching rates of Si and K were 98.4%and 94.4%,respectively.This research provided theoretical basis and technical guidance for the production of silicon potassium fertilizer by potassium feldspar tailings.

关 键 词：硅钾肥 钾长石尾矿 焙烧 柠檬酸 浸出率 

分 类 号：TU528.33[建筑科学—建筑技术科学]