高硫铜精矿转化铜铅锍的热态分析

IF 0.8 Q4 METALLURGY & METALLURGICAL ENGINEERING Kompleksnoe Ispolzovanie Mineralnogo Syra Pub Date : 2023-10-03 DOI:10.31643/2024/6445.19
E. Zoldasbay, A. Argyn, N. Dosmukhamedov
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引用次数: 0

摘要

根据前人关于用铜铅锍直接处理高硫铜精矿的可能性的结论,对转化过程的热状态进行了分析。结果表明,传统的自熔炼计算方法并不完全正确,需要考虑过量硫对自熔炼过程温度状态的影响。已经确定,在转换铜铅锍的过程中,观察到温度变化的范围很广-从1027 0С到1300 0С。当精矿与磨砂相结合时,该过程的温度状态稳定,这确保了生产硫酸所需气体中SO2浓度的最佳水平。在对现有工艺转化铜铅锍的物料平衡进行计算的基础上,在添加精矿的情况下,建立了转化过程的热平衡结构。热平衡结构发生了强烈的变化,这是由于过量的硫使磁铁矿减少,以及由于精矿中引入的额外数量的硫化铁氧化而引起的热量增加。将该方法计算的铜铅锍第一期转化工艺参数与某冶金装置的实际数据进行对比分析,可以评估该装置在达到热力学平衡之前发生的过程的近似程度。
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Analysis of the thermal regime of converting of copper-lead matte with high-sulfur copper concentrate
According to the earlier conclusions about the possibility of direct processing of high-sulfur copper concentrates with copper-lead matte, analysis of the thermal regime of converting was carried out. It is shown that the traditional calculation methods used to calculate autogenous smelting are not entirely correct and require taking into account the effect of excess sulfur on the temperature regime of the process. It has been established that in the process of converting copper-lead mattes, a wide range of temperature variation is observed - from 1027 0С to 1300 0С. When the concentrate is combined with the matte, the temperature regime of the process is stabilized, which ensures the optimal level of SO2 concentration in the gases required for the production of sulfuric acid. Based on the calculation of the material balance of converting copper-lead mattes using the existing technology and with the addition of a concentrate, the structure of the heat balance of the converting process was established. A strong change in the structure of the heat balance is shown, which is explained by the reduction of magnetite with excess sulfur and an increase in heat due to the oxidation of an additional amount of iron sulfide introduced with the concentrate. A comparative analysis of the technological parameters of the 1st converting period of copper-lead mattes calculated by the proposed method with the practical data of a specific metallurgical unit allows assessing the degree of approximation of the processes occurring in the unit until the thermodynamic equilibrium.
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