摘要
为提高煤粉磁选脱硫降灰效率,以北宿煤为样品,对其中矿物组分进行了X射线衍射分析,应用振动样品磁强计研究其磁性,考察了密度组成、粒度组成和磁场强度同比磁化率的关系.研究表明:比磁化率同密度间存在线性相关关系,以1.6 g/cm3为界,高、低密度级煤分别呈顺磁性和逆磁性,且随煤粉粒度的减小,低密度级煤的逆磁性减弱,而高密度级煤的顺磁性增强;磁场强度对煤的磁性有一定影响.采用X100-10型永磁振动高梯度磁选机进行了煤粉的磁选试验,脱硫率和脱灰率最高达到55.52%和64.41%,磁选试验脱灰效果明显.
To improve desulphurization and deash efficiency of fine coal with a magnetic separa tion, the mineral composition and magnetism of Beisu coal were analyzed by a XRD and VSM, respectively. The relation between magnetic susceptibility and density, size as well as magnetic field intensity was investigated. The results show that there is a linear correlation between magnetic susceptibility and density. Take 1.6 g/cm^3 as a boundary value, the magnetism of high density coal and low density coal was opposite. The diamagnetism property of low density coal weakens and the paramagnetism of high density coal enhances along with the size reduction of fine coal. The magnetic field intensity influences the magnetism of coal. Using X100-- 10 high gradient permanent magnetic separator, the dry separation experiments of fine coal were completed, the desulphurization and deash rates achieved 55.52% and 64.41%, respectively.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2009年第1期131-134,148,共5页
Journal of China University of Mining & Technology
基金
河南省重点科技攻关项目(117309)
