酸化ニッケル鉱石の硝酸溶液による浸出に関する要因効果の探索
1980 年 96 巻 1107 号 p. 337-340
詳細
1980 年 96 巻 1107 号 p. 337-340
Hydrometallurgical process, leaching out metals into the solution from ores at low temperature, is more economical consumption of energy than the high temperature treatment as the smelting process. The purpose of this study, is to research for the optimal condition of the leaching process of nickel by nitric acid solution from garnierite ore. In above mentioned treatment, metal, leached out into the solution from the ore, is not only nickel but also iron and magnesium etc. The extractions of these metals are affected by the leaching conditions.
In this report, the experimental conditions were arranged to the table of orthogonal array. The data obtained from these experiments were treated statistically, and the factorial effects of a series of experiment wee evaluated. In the sphere of these experiments, the condition of maximization of nickel extraction was pursued, and in this condition the extractions of nickel, iron and magnesia were estimated as follows:
Ni=98.4-99.0%, Fe=47.1-55.1%, MgO=87.1-92.9%.
Standing on the viewpoint of the industrial evaluation, the extraction of nickel in this condition will be regarded as satisfactory. The extractions of iron and magnesia, however, cannot be so. Where, the development of this statistical treatment, that is, the steepest ascent method will be lead our study to discover the industrial optimal condition.
