铜冶炼过程碳排放及自热熔炼分析

“双碳”背景下，我国铜冶炼作为高耗能高排放行业需突破资源、能源、供求关系等多重制约因素，方能迈上铜工业低碳绿色创新可持续发展道路。采用熔炼系统能量流平衡模型研究其能源利用收支情况，有利于进一步挖掘节能潜力，实现富氧底吹熔炼过程的低碳可持续化高效生产。通过计算铜冶炼厂底吹熔炼体系各类热量的收入和支出行为，解析无碳质燃料投入工况下的热量收支平衡关系，继而提出无碳自热熔炼的优化改进方案。因此，从原料适配、操作制度、设备优化等多方式调控以实现富氧底吹无碳自热熔炼。从碳源上减少或避免煤粉的加入，从而降低过程碳排放，以期为铜冶炼的清洁生产提供有益的思路和建议。

Analysis of Carbon Emission and Self-Heating Smelting in Copper Smelting Process

Under the background of “Dual Carbon Goal”, China''s copper smelting, as a high-energy-consuming and high-emission industry, needs to break through the multiple constraints of resources, energy, supply and demand, in order to move towards the low-carbon, green, innovative and sustainable development of the copper industry. Adopting the energy flow balance model of the smelting system to study its energy income and expenditure situation is helpful to further explore the energy saving potential and realize the low-carbon sustainable and efficient production of oxygen-enriched bottom-blowing smelting process. By calculating the various types of heat income or expenditure behavior of bottom-blowing smelting system in copper smelters, the heat balance relationships without carbon-free fuel input were analyzed, and the optimization and improvement plan of carbon-free self-heating process was proposed. Therefore, in order to realize oxygen-rich bottom-blown carbon-free self-heating smelting, it can be controlled in many ways, such as raw material adaptation, operation system and equipment optimization. To reduce or avoid the addition of pulverized coal from carbon source, so as to reduce the carbon emission of the process, as a result, it can provide useful ideas and suggestions for the cleaner production of copper smelting.