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首页> 外文期刊>Russian Journal of Non-Ferrous Metals >USE OF NATURAL BRINES IN FABRICATION OF LITHIUM CHLORIDE AND LITHIUM-CONTAINING FLUORIDE SALTS FOR USE IN ELECTROLYTIC PRODUCTION OF ALUMINUM
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USE OF NATURAL BRINES IN FABRICATION OF LITHIUM CHLORIDE AND LITHIUM-CONTAINING FLUORIDE SALTS FOR USE IN ELECTROLYTIC PRODUCTION OF ALUMINUM

机译：天然卤水在氯化铝和含锂氟化物盐的制备中的用途，用于电解生产铝

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The articles presents the first time suggestions for the use of calcium-chloride-type lithium-containing brines in the production of inexpensive lithium fluoride-enriched fluoride salts. Through the use of these brines it is possible to manufacture an efficient additive for the electrolyte in aluminum electrolysis. The newly developed technology for the production of lithium-containing fluoride salts incorporates selective extraction of Li from the brines through use of a granulated sorbent based on LiCl centre dot 2Al(OH)_3mH_2O and fluorination of the lithium chloride-enriched eluates obtained. In fluorination of the eluates by means of selective sorption following concentration of the eluates, which contain up to 40 g/l LiCl and an impurity consisting of magnesium and calcium chlorides a mixture of fluoride salts (LiF, MgF_2, CaF_2) with LiF content at least 55 percent is obtained. Through purification of the eluates from the magnesium and calcium impurities it is possible to obtain lithium chloride of a high degree of purity (up to 99 percent). Alkaline eluates may be used for recovery of fluorine from electrolytic waste gases, thus decreasing the volume of harmful discharges of HF into the atmosphere.
机译：文章首次提出了在廉价的富含氟化锂的氟化盐生产中使用氯化钙型含锂盐水的建议。通过使用这些盐水，可以制造用于铝电解中的电解质的有效添加剂。用于生产含锂氟化物盐的新开发技术包括通过使用基于LiCl中心点2Al（OH）_3mH_2O的粒状吸附剂并从氟化物中富集氯化锂的洗脱液，选择性地从盐水中提取Li。在浓缩洗脱液后，通过选择性吸附进行氟化，在洗脱液中包含多达40 g / l的LiCl和由镁和氯化钙组成的杂质，氟化物盐（LiF，MgF_2，CaF_2）的混合物至少获得55％。通过从镁和钙杂质中提纯洗脱液，可以获得高纯度（最高99％）的氯化锂。碱性洗脱液可用于从电解废气中回收氟，从而减少了向大气排放的有害的HF量。

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