CAJ | 학술논문

为探索表面改性对微粉煤摩擦荷电特征的影响，对微粉煤表面进行改性处理，分析不同改性条件对微粉煤中主要矿物成分及各密度级微粉煤的介电常数和荷质比的影响。试验结果表明：表面改性对试验样品的摩擦荷电特征产生了比较明显的影响，用煤油做表面改性剂，当改性剂用量为9000 g/t、改性时间为10 s时，微粉煤中净煤与黄铁矿，高岭土、石英的荷质比差异以及各密度级微粉煤的荷质比差异都比较显著，这种差异有利于在微粉煤摩擦电选过程中脱除含灰分和硫分较多的高密度级微粉煤，提高摩擦电选的脱硫降灰效果。
위탐색표면개성대미분매마찰하전특정적영향，대미분매표면진행개성처리，분석불동개성조건대미분매중주요광물성분급각밀도급미분매적개전상수화하질비적영향。시험결과표명：표면개성대시험양품적마찰하전특정산생료비교명현적영향，용매유주표면개성제，당개성제용량위9000 g/t、개성시간위10 s시，미분매중정매여황철광，고령토、석영적하질비차이이급각밀도급미분매적하질비차이도비교현저，저충차이유리우재미분매마찰전선과정중탈제함회분화류분교다적고밀도급미분매，제고마찰전선적탈류강회효과。
Charged for exploring the surface modification of pulverized coal friction characteristics,the influence of the pulverized coal surface modification treatment,different modification conditions on the analysis of main mineral composition and density in the pulver-ized coal level micro dielectric constant of pulverized coal and the influence of the charge-mass ratio. Experimental results show that friction charged characteristics of surface modification of test samples had a obvious effect,the use of kerosene in the surface modifica-tion agent,when the dosage of modifier for 9 000 g/t,modification time of 10 s,clean coal and pyrite in the pulverized coal,the charge-mass ratio difference of kaolin,quartz and density grade of pulverized coal charge-mass ratio difference is significant,the difference is helpful for removal in the process of micro friction pulverized coal electric separation contain more micro level high density pulverized coal ash and sulfur content,improve the effect of friction electric separation of the desulfurization ash fall.