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近年来地质证据的积累,使人们认识到铜在气相中迁移是一种重要的地球化学过程,但目前关于铜在气相中溶解反应机理的研究还相当缺乏.采用溶解度法,在330～370℃,压力为4.2～10.0×106 Pa的条件范围内,实验研究了CuCl2在不饱和水蒸气相中的溶解度.结果表明:水蒸气的存在,大大增强了铜在气相中的溶解能力;恒定温度下,铜在气相中的溶解度随着水蒸气压的增加而增大,两者呈正相关关系.气相中铜以水合物的形式存在,铜在气相中的溶解可由以下反应表述:CuCl2solid+nH2Ogas=CuCl2(H2O)ngas其中水合数随着温度升高而下降,温度为:330℃水合数n约为4.0,350℃水合数n约为3.6,370℃水合数n约为3.3.
Accumulation of geological evidence in recent years has made people realize that the migration of copper in the gas phase is an important geochemical process, but the current research on the mechanism of copper dissolution in the gas phase is still lacking.Using the solubility method, , The pressure is 4.2 ~ 10.0 × 106 Pa conditions, the experimental study of CuCl2 in the unsaturated water vapor phase solubility results show that: the presence of water vapor, greatly enhance the dissolution of copper in the gas phase; under constant temperature , The solubility of copper in the gas phase increases with the increase of water vapor pressure, and there is a positive correlation between the solubility of copper in the gas phase and the solubility of copper in the gas phase as follows: CuCl2solid + nH2Ogas = CuCl2 (H2O) ngas where the hydration number decreases with increasing temperature at 330 ° C hydration number n is about 4.0, 350 ° C hydration number n is about 3.6, 370 ° C hydration number n is about 3.3.