1.Thes study and bring forward a new formula for acid bleaching of barite powders containing impurities such as fluorite and calcite.
研究并提出用稀鹽酸、硼酸和反應助劑作為含有螢石、方解石雜質(zhì)的重晶石粉體酸漂增白的新配方。
2.The antimony ores are mainly composed of such minerals as stibnite, quartz, opal and calcite.
礦石礦物主要為輝銻礦,脈石礦物有石英、蛋白石和方解石等。
3.Thes study and bring forward a new formula for acid bleaching of barite powders containing impurities such as fluorite and calcite.
研究并提出用稀鹽酸、硼酸和反應助劑作為含有螢石、方解石雜質(zhì)的重晶石粉體酸漂增白的新配方。
5.Both fractures and vugs may be closed or partially closed by precipitated calcite or other similar material.
裂縫和巖穴被方解石沉淀物或其它類(lèi)似的物質(zhì)完全或部分地封閉。