Ali Imran, Gaydukova Anastasya, Kon'kova Tatiana, ALOthman Zeid Abdullah, Sillanpää Mika
Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India.
Department of Inorganic Substances Technology and Electrochemical Processes, Mendeleev University of Chemical Technology, 9 Miusskaya Sq., Moscow 125047, Russia.
Molecules. 2023 Jul 20;28(14):5545. doi: 10.3390/molecules28145545.
Recycling waste from the production and consumption of heat-resistant alloys to return them to production is an urgent task due to the high cost of the components contained in these alloys. The kinetics and conditions of the acid leaching process of the grinding waste of a heat-resistant nickel alloy are studied depending on the composition of the acid solution (HSO, HCl, HNO, and their mixtures) at room temperature to boiling point temperature and various acid concentrations (1.5 to 3.0 mol/L), ratios of waste to solution (1:10 to 3:10), fraction sizes (0.04-1 mm), and contact duration (1 to 120 h). The linearization of experimental data by the Gray-Weddington, Gistling-Brownstein, and Kazeev-Erofeev equations showed that the rate of the leaching process was influenced by both the chemical reactions between sulfuric acid and metals included in the grinding waste and the diffusion of reagents through the film of reaction products and undissolved impurities. Optimal conditions for acid dissolution of the grinding waste have been established to obtain the maximum degree of extraction of the main component of the alloy, nickel. The processing of powder particles with a size of less than 0.1 mm should be carried out in a solution of sulfuric acid with a concentration of 3.0 mol/L at a temperature of 100 °C for 6 h with a ratio of solid to liquid phases of 1:10. The reported results are very important for industry personnel to recover metals and for environmentalists to treat the alloy waste.
由于耐热合金所含成分成本高昂，回收耐热合金生产和消费过程中产生的废料并使其重新投入生产成为一项紧迫任务。研究了耐热镍合金研磨废料在室温至沸点温度下，根据酸溶液（硫酸、盐酸、硝酸及其混合物）组成、各种酸浓度（1.5至3.0摩尔/升）、废料与溶液比例（1:10至3:10）、颗粒尺寸（0.04 - 1毫米）以及接触时间（1至120小时）进行酸浸出过程的动力学和条件。通过格雷 - 韦丁顿、吉斯廷 - 布朗斯坦和卡泽耶夫 - 叶罗费耶夫方程对实验数据进行线性化处理表明，浸出过程的速率受硫酸与研磨废料中所含金属之间的化学反应以及试剂通过反应产物和未溶解杂质膜的扩散影响。已确定了研磨废料酸溶解的最佳条件，以获得合金主要成分镍的最大提取率。对于尺寸小于0.1毫米的粉末颗粒，应在浓度为3.0摩尔/升的硫酸溶液中，于100℃温度下处理6小时，固液相比例为1:10。所报道的结果对于工业人员回收金属以及环保人士处理合金废料非常重要。
