摘要
黑滑石是一种富镁硅酸盐类矿物,呈现黑色、灰黑色、白色。高白度的滑石可部分代替钛白粉等,因此黑滑石的煅烧增白可极大提高它的价值。对黑滑石进行了不同温度和不同时间的煅烧试验,并通过采用X射线衍射分析(XRD)、热重分析、元素分析等实验方法,对黑滑石煅烧增白的机理进行了分析研究。结果表明,碳(包括无机碳和有机碳)的燃烧消失是黑滑石煅烧增白的主要原因。此外,试验还进一步研究了样品粒度、煅烧温度和煅烧时间等对黑滑石煅烧增白程度的影响。
Black talc is a rich magnesium silicate minerals, appearing black, gray and white. High degree of whiteness talc can partly replace titanium pigment, so calcination whitening can improve black talcls value. Black talc was calcinated at different temperature and for different time, and the mechanism of black talcls calcination whitening was analysed and studied by experimental methods of XRD, thermogravimetric analysis and elemental analysis. The results show that burn out of carbon （including inorganic and organic car- bon） is the main cause of black talc＇s whitening. Furthermore, the effect of sample grain size, calcination temperature and time on whit- ening degree was studied.
出处
《水泥工程》
CAS
2013年第5期9-12,15,共5页
Cement Engineering
关键词
黑滑石
煅烧增白
实验研究
black talc
calcination whitening
experimental investigation
