节点：中游（冶炼、中间品）位置：中游情绪：中性参考度：2/10
再生钢生产商SSAB Americas与Alter Trading、Greenbrier Companies合作建立闭环供应链，以验证近零排放钢的可行性。根据该计划，Greenbrier将采用SSAB Zero钢制造50辆gondola铁路货车，该优质钢种通过电弧炉（EAF）技术生产，碳排放接近零。车辆投用后，Alter Trading将利用这些专用铁路货车将回收钢废料运输至SSAB位于爱荷华州蒙彼利埃的工厂，形成可持续制造的完整循环材料闭环。
此次合作瞄准重大脱碳里程碑，成功将近零排放钢整合至重型运输基础设施。Greenbrier制造50辆gondola货车的过程验证了可持续钢的性能，该材料可满足重型货运应用的严苛结构要求。通过以SSAB Zero替代传统钢，项目摒弃碳抵消依赖，转而聚焦生产流程文档化、物流优化及材料可追溯性。
该计划的关键环节在于构建本地化高容量循环经济。圣路易斯的Alter Trading负责回收钢废料的采购与装载，随后直接..
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