摘要
为了促进磷矿-碳复合球团在黄磷生产中的应用,进行了磷矿粉-碳质还原剂冷压造球试验研究,考查了黏结剂种类及配比、原料粒度、配碳量等因素对生球性能的影响以及生球烘干过程的脱水行为和强度变化。试验结果表明:随着腐植酸钠配比从0.5%增至2.0%,落下强度和抗压强度均先升高后降低;随着膨润土配比从0.5%增至2.0%,抗压强度先降低后升高,但是落下强度先缓慢升高后明显升高;随着原料粒度从-35目减至-200目,生球的抗压强度和落下强度先升高后降低,-80目时达到最大;随着碳氧比从0.5增至2.0,生球抗压强度和落下强度均明显降低;随着烘干温度从80℃增至150℃,烘干速率加快,生球失水率达到97%以上时即可重新获得较高强度。研究结果可为以磷矿-碳复合球团为炉料的低能耗黄磷生产工艺开发提供理论参考。
In order to promote the application of phosphate-carbon composite pellet in the yellow phosphorus production,the study on the cold consolidation of phosphate-carbon composite pellet was conducted.The effect of the types and dosage of binder,particle size of raw materials,and carbon content on the properties of green pellets,as well as the dehydration behavior and changes of its intensity during the drying process of green pellets were studied.It has been found that as the dosage of sodium humate increased from 0.5% to 2.0%,both the drop strength and compres-sive strength increased and then decreased.As the concentration of bentonite increased from 0.5% to 2.0%,the compressive strength decreased and then increased,but the drop strength increased slowly and then markedly.As the particle size of the raw materials was reduced from-35 mesh to-200 mesh,the compressive strength and drop strength of the green pellet increased and then decreased,reaching the maximum at -80 mesh.As the ratio of carbon to oxygen increased from 0.5 to 2.0,the compressive strength and drop strength of the green pellet dropped significantly.With the increase of drying temperature from 80℃ to 150℃,the drying of green pellet was speeding up,and the green pellet could regain its high intensity when 97% of moisture was removed.The experimental results will be provided as the theoretical reference for the development of the technology for yellow phosphorus production with low power consumption when using the phosphate ore-carbon composite pellet as the furnace burden.
作者
王广
董剑豪
张燕
Wang Guang;Dong Jianhao;Zhang Yan(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Beijing MMAY Technology Co.,Ltd.,Beijing 100000,China;Guizhou Aerospace MWAY Technology Co.,Ltd.,Guiyang Guizhou 550300,China)
出处
《化工矿物与加工》
CAS
2021年第3期16-20,共5页
Industrial Minerals & Processing
基金
钢铁冶金新技术国家重点实验室自主研发课题(41619021)。
关键词
磷矿
黄磷
复合球团矿
胶黏剂
还原剂
抗压强度
phosphate ore
yellow phosphorus
composite pellet
binder
reductant
compressive strength
