Ferrochrome (FeCr) industries are significant CO₂ emitters and will become liable for carbon tax (CT) - officially implemented in June 2019. To estimate the CT liability of an entity, the CO₂ emissions must be determined as accurately as possible. The prescribed technique to quantify these emissions, however, is overly generic and its implementation uncertain. The article evaluates the application and understanding of different approaches used for estimating GHG (CO₂) emissions by assessing the three prescribed calculation methods (tiers) in terms of the practical applicability. These default tiers for calculating the CO₂ emissions have not been practically applied to any “real-world” case studies and have also not been compared to each other in a practical industrial scenario. Despite the relative simplicity of the formulas, the practical application has inherent risks and is sensitive to errors in data and the general understanding of the system. The three prescribed methods deliver varying results, together with possible constraints that may cause the results to vary to an even larger degree. A significant contribution of the approach is realized by improved CT liability estimation. The monetary value for the entire FeCr industry in SA decreased throughout the course of this study: from an initial estimation of R562 million (USD 38 million) per annum with a 50% uncertainty (purely based on literature assumptions) to a value of R497 million (USD 34 million) with a 5% uncertainty (based on the use of prescribed methods). This study was conducted to critically assess the CO₂ emission quantification methods available to the FeCr industry. Although this study is based on the South African FeCr industry, it can be applied to international FeCr furnaces as well.

铬铁（FeCr）行业是重要的CO ₂排放者，并将对碳税（CT）承担责任-将于2019年6月正式实施。要估算实体的CT责任，必须尽可能准确地确定CO ₂排放量。但是，用于量化这些排放的规定技术过于笼统，其实施方式还不确定。本文通过评估在实际适用性方面的三种规定的计算方法（层），来评估用于估算温室气体（CO ₂）排放量的不同方法的应用和理解。这些用于计算CO _2的默认层排放量尚未实际应用于任何“现实”案例研究中，也没有在实际的工业场景中进行相互比较。尽管公式相对简单，但是实际应用中存在固有风险，并且对数据错误和系统的一般理解敏感。三种规定的方法可提供变化的结果，以及可能导致结果变化更大的可能的约束。通过改进的CT责任估算，可以实现该方法的重要贡献。在整个研究过程中，南非整个FeCr工业的货币价值都在下降：从最初的估计每年5.62亿雷亚尔（3800万美元），不确定性为50％（完全基于文献假设）到不确定的5％，数值为4.97亿兰特（3400万美元）（基于规定方法的使用） ）。进行这项研究是为了严格评估COFeCr行业有_2种排放量化方法。尽管此研究基于南非的铬铁行业，但它也可以应用于国际铬铁熔炉。