Sand Mineral particles consisting mainly of quartz, felspar, and mica, and measuring between 2 and 0.05mm in diameter.

主要由英、、云母等矿物微粒构成，其直径在0.05~2mm之间。

In this paper, the research process of the fire - proof calcium silicate board trial - produced with theindustrial tailings - felspar powder is reported.

文报道了使用工业尾矿粉试制酸钙板的研究过程。