Molybdenum is mainly used as an alloy material in the iron and steel industry and typically in the form of ferromolybdenum (FeMo). The current study aims to evaluate the energy consumption and greenhouse gas emissions (GHG) of four ferromolybdenum production cases using inventory inputs from a process model based on mass and energy conservations. The total energy required for producing 1 tonne of FeMo can vary between 29.1 GJ/t FeMo and 188.6 GJ/t FeMo. Furthermore, the corresponding GHG emissions differ from 3.16 tCO₂-eq/t FeMo to 14.79 tCO₂-eq/t FeMo. The main variances are from the mining and beneficiation stages. The differences in these stages come from the beneficiation degree (ore grade) and the mine type (i.e., co-product from copper mining). Furthermore, the mine type has a larger impact on the total energy consumption and GHG emissions than the beneficiation degree. More specifically, FeMo produced as co-product from copper mining has a lower environmental impact measured as the energy consumption and GHG emission among all the four cases. The inventory, consumed energy or associated GHG emission is independent on the initial ore grade and mine type in the downstream production stages such as roasting and smelting. Also, transport has the least impact on the energy consumption and GHG emission among all production stages.

中文翻译：

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钼铁生产过程中的能源消耗和温室气体排放

钼在钢铁工业中主要用作合金材料，通常以钼铁（FeMo）的形式使用。当前的研究旨在使用来自基于质量和能量守恒的过程模型的库存输入来评估四个钼铁生产案例的能源消耗和温室气体排放量（GHG）。生产1吨FeMo所需的总能量在29.1 GJ / t FeMo和188.6 GJ / t FeMo之间变化。此外，相应的温室气体排放量从3.16 tCO ₂ -eq / t FeMo到14.79 tCO ₂-eq / t FeMo。主要差异来自采矿和选矿阶段。这些阶段的差异来自选矿程度（矿石品位）和矿山类型（即铜矿开采的副产品）。此外，矿山类型对总能耗和温室气体排放的影响大于选矿程度。更具体地说，在所有四种情况下，从铜矿开采产生的副产品FeMo的能耗和温室气体排放量来看，对环境的影响都较小。库存，消耗的能源或相关的GHG排放与下游生产阶段（如焙烧和冶炼）中的初始矿石等级和矿山类型无关。此外，在所有生产阶段中，运输对能源消耗和温室气体排放的影响最小。