Featured with diaspore, highalumina, high silicon and low iron, the bauxite in Shanxi have to be digested under higher temperature and denser soda in Bayer process.
山西铝土矿呈一水硬铝石型，高铝、高硅、低铁的特点，拜耳法生产氧化铝工艺须在高温，高碱的条件下溶出。
2
Superior raw materials, highalumina hard material used as grinding media, high pressure forming and fast firing are used for making high quality granite tiles recently.
制造高质量的花岗岩砖均采用优质原料、高铝硬质研磨介质、高压成型及快速烧成。
3
A comparative test of standard clay bricks, highalumina bricks, silica bricks and periclase bricks which were used as checkers in upper parts of regenerators has been conducted.