smoky gray

Very fine linear and dust-like matal sulfides spreading in the grey quartz with higher gold grades are determined to be responsible for the grey-dark grey colour.

　对河南卢氏石门金矿床中矿石经偏光、反光显微镜下研究,发现自然金与细脉状的黄铁矿黄铜矿脉、黄铁矿方解石脉共生;含金品位较高的烟灰色石英内分布有网脉状金属硫化物细丝以及尘埃状不透明的金属矿物,造成宏观上石英呈烟灰色至深灰色。

The paper introduces the ammonia process of producing high-grade zinc oxide from impurities zinc oxide dust which produced by the smoked stoves in a large internal smelter.

本文介绍了利用氨法处理杂质成分复杂的某大型冶炼厂炼铅系统烟化炉氧化锌烟灰制备高等级氧化锌的工艺。

The theories of the reaction for all elements in dust at volatilizing kiln was studied.

研究了钢厂烟灰各种成分的反应原理 ,根据这些原理 ,对炉料温度 ,炉料的混合与加料方式 ,窑内的负压控制和焦粉的粒度进行了条件试验 ,得出了最佳工艺条件 ,指导了生

It has not only economical and social benefit but also meets the need of clean production to reclaim rich metals such as copper,lead,bismuth,zinc from copper blast furnace dust.

铜转炉烟灰富含Cu、Pb、Bi、Zn等元素,回收这些有价元素,不仅是环保和清洁生产的需要,而且可以获得一定的经济效益和社会效益。