请各位帮助翻译这段句子？ to avoid impurification of the metal to be deoxidized by the metal of the added heavy metal fluori ... 根据字典的解释如下 impurification im- 用于以 m, p 或 b 开头的单词前,构成反义词）表示“不”，“无”，“非” - purification n. 洗净； 涤罪； 提纯； (犹太妇女按教规在月经后行的)洁净礼 现在把文章的一部分给你看一下，以便你进一步了解文章： in fluoride salt melts there are present no elemental metallic impurities which by diffusion can lead to an increase in the impurities in the surface of the metal to be treated. the vapor pressure of the salts used for the deoxidation is lower than that of calcium and magnesium. the salt melts of the invention are also definitely superior to the previously used metals for deoxidation in regard to wettability, elimination of metallic impurities and vapor pressure. it has proven especially favorable to add up to 20%, e.g., 0.5 to 20%, of a fluoride of a metal to the fourth to seventh side group of the periodic system of the elements (group ivb, vb, vib and viib). thus, there can be used k2 taf7, k2 tif6, k2 zrf6, k2 nbf7, crf3, crf2, mnf2, for example. to avoid impurification of the metal to be deoxidized by the metal of the added heavy metal fluoride which can be formed by redox processes in the melt it is recommended to add to the salt melt a fluoride of the metal to be deoxidized. temperatures of 800 to 1000° c. have proven advantageous the process of the invention has the further advantage that the salt melt which after long use is no longer deoxidizingly effective can be regenerated again by treatment with a hydrogen fluoride - hydrogen mixture in the same equipment. 上面英文文章中红体字是我看不懂的部分， 我的英文水平有限，还请你帮助综合分析一下。 查看更多
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