南系岩画大都以红色涂绘，颜料是以赤铁矿粉调合牛血等而成的。
Most of them are painted red with bloodstone powder and ox blood.
对流态化预还原过程中碳吸附条件下赤铁矿粉的物化性质、结构变化规律进行了研究。
The present paper studies the law of changes in the physical and chemical properties and structure of the hematite ore fines under the absorption condition in the process of fluidized pre-reduction.
加入氯化钙可减少凝固时间，加入石膏可增加凝固时间，加入重晶石和赤铁矿粉可增加密度，加入膨润土和火山灰可减小密度。
Calcium chloride is added to reduce setting time, gypsum to increase setting time, barite and hematite to increase density, and bentonite and pozzolans to decrease density.
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