摘要
河南某地钾长石K2O含量达15.00%,属于优质高品位钾长石,Fe2O3含量1.12%,需对其进行提纯降铁。在对原矿进行物相成分分析的基础上,进行弱磁-强磁选和摇床-强磁选两种工艺对比试验,结果表明:以除铁效果来看,摇床-强磁选的选别效果优于弱磁-强磁选。在磨矿细度为-0.074 mm占50.36%、强磁选强度为1 600 kA/m时,经重选-强磁联合流程提纯的钾长石产率为93.50%,K2O含量为15.31%,"Fe2O3+TiO2"含量0.02%,符合中国建材行业标准(JC/T 895-2000)中优等品(A)级钾长石。
Research on the properties of raw ore showed that the ore is high grade with K2O content 15.00%.Compared with the industrial standard,there also has 1.12% Fe2O3 existing in magnetite and pyrite slightly,which should be removed to improve the quantity of the feldspar.Two technology,low intensity-strong magnetic separation and gravity-strong magnetic separation,were studied and compared in this paper basis on the analysis of the mineral composition.It was showed that gravity-strong magnetic separation is superior to low intensity-strong magnetic separation technology,with lower Fe2O3 content.The reason for the superiority of the gravity-strong magnetic separation technology was studied and explained.Feldspar concentrate with productivity 93.50%,K2O 15.31% grade and low "Fe2O3+TiO2" content(0.02%) could be got under the condition of grinding fineness-0.074 mm of 50.36% and 1 600 kA/m magnetic field intensity.The concentrate of the separation reaches the quality requirement of grade A feldspar products in industrial standard JC/T 895-2000.
作者
许炜光
李卓林
聂轶苗
Xu Weiguang;Li Zhuolin;Nie Yimiao(College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei 063210;EGIN Environmental Science and Technology(Tianjin)Co.,Ltd.,Tianjin 300380)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第1期55-58,共4页
Non-Metallic Mines
基金
河北省高等学校科学研究计划项目（QN2015091）
河北省高层次人才资助项目（A201901053）
关键词
钾长石
降铁提纯
摇床-强磁选联合流程
工艺流程对比
feldspar
deiron
gravity-strong magnetic separation technology
comparison study of separation technology
