CAJ | 학술논문

通过对电镀污泥氯化焙烧的热力学分析，选择氯化铵为氯化剂，在焙烧温度为673 K时可以实现对主要金属离子镍、铜的氯化，而其中铁的物相以针铁矿、赤铁矿为主，理论上难以被氯化。对氯化焙烧后的物料进行弱酸浸出，最佳浸出条件为：盐酸酸度为1 mol／L、浸出时间为45 min、浸出温度为318 K、液固比4∶1，此时主金属离子镍、铜的浸出率分别为97．48％和87?65％，而铁的浸出率只有26．83％，所得结果与热力学分析比较吻合。
통과대전도오니록화배소적열역학분석，선택록화안위록화제，재배소온도위673 K시가이실현대주요금속리자얼、동적록화，이기중철적물상이침철광、적철광위주，이론상난이피록화。대록화배소후적물료진행약산침출，최가침출조건위：염산산도위1 mol／L、침출시간위45 min、침출온도위318 K、액고비4∶1，차시주금속리자얼、동적침출솔분별위97．48％화87?65％，이철적침출솔지유26．83％，소득결과여열역학분석비교문합。
According to the thermodynamic analysis for chloridizing roasting of electroplating sludge, main metal ions including nickel and copper can be chloridized when roasted at 673 K with ammonium chloride as the chloridizing agent, while iron, with goethite and hematite being the dominant phase, is theoretically difficult to be chloridized. Materials from roasting were leached by weak acid, and parameters were optimized as follows:the acidity of hydrochloric acid was 1 mol/L, leaching time was 45 min, leaching temperature was 318 K, and liquid to solid ratio was 4∶1. The results are consistent with the thermodynamic analysis, as leaching rates of nickel and copper are 97. 48% and 87. 65%, respectively, while leaching rate of iron is only 26.83%.