Abstract The zinc roasting process has been the subject of several studies regarding the roaster and its feed characteristics. However, to identify the most sustainable operating scenario, it is necessary to consider the behavior of the whole plant. In this work, a zinc roasting process model was developed, validated with plant data, and then used to evaluate heat transfer throughout the entire plant. Through simultaneous manipulation of decision variables and changes in values of the heat transfer area at different points of the plant, a sensitivity analysis was performed, generating hundreds of operating scenarios in terms of zinc oxide production and green steam generation (steam generated without burning any fuel), which were investigated to determine conditions that yield savings, from an economic and environmental point of view. Without capital investment, zinc oxide production could be increased by 10.6 %, although the green steam generation decreased by 8.6 %. With capital investment to intensify heat transfer, results showed that it is possible to promote an increase in both zinc oxide production and green steam generation by up to 14.2 % and 10.6 %, respectively, and a reduction of up to 14,000 t/year in CO2 emissions.

中文翻译：

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应用于锌焙烧过程的强化传热：经济和环境因素

摘要 锌焙烧工艺已成为有关焙烧炉及其进料特性的多项研究的主题。但是，要确定最可持续的操作方案，就必须考虑整个工厂的行为。在这项工作中，开发了一个锌焙烧过程模型，用工厂数据进行了验证，然后用于评估整个工厂的热传递。通过同时操纵决策变量和工厂不同点传热面积值的变化，进行了敏感性分析，在氧化锌生产和绿色蒸汽生成（不燃烧任何燃料的情况下生成的蒸汽）方面生成了数百个操作场景)，从经济和环境的角度对这些进行了调查，以确定产生节约的条件。如果没有资本投资，氧化锌产量可增加 10.6%，但绿色蒸汽产生量减少 8.6%。通过对强化传热的资本投资，结果表明氧化锌产量和绿色蒸汽产生量分别可提高 14.2 % 和 10.6 %，二氧化碳排放量最多可减少 14,000 吨/年排放。