refining earth

For the process of taking gold out of the earth and crushing and refining it is a technical process, subject, like all technical processes, to improvement.

从金矿的开采、破碎到提炼，这是个技术过程，而与其他技术过程一样，它也将会不断改进。

In the refining process of oils, 2%~ 5% activated bleaching earth usually is used. If the spent bleaching earth can not be treated in time, it will pollute the environment.

油脂精炼过程中，通常使用油重2%～5%的活性白土进行吸附脱色，脱色后的废白土若处理不及时，会造成环境污染。

The paper presents some results obtained from a research about effects of rare-earth ( RE) and boron ( B) refining on the microstructure and dezincification corrosion properties of casting lead brass.

研究了加入稀土和硼细化处理对铸造铅黄铜组织和脱锌腐蚀性能的影响。

Function of Bleaching Earth Adsorption and Deodorization in Refining Processing

白土吸附和脱臭工艺在精炼过程中的作用