DATA_BLENDING_TRANSFER

The management of the production and transfer, by a 187 km pipeline, of phosphoric merchantable ores (MO) in a pull-flow mode is a formidable stake for the world's largest site of this kind, belonging to the Morocco OCP. MOs are obtained by washing extracted Source Ores (SOs) in parallel lines, using alternative routings that modify their weight and composition, before being mixed in tanks to get the required quality defined by a set of composition constraints. The blending problem is original as it considers a two-step production process of washing before blending, which is more binding than the blending before washing. The pipe transfer program defines batches to transport and their schedule, considering downstream demands (a roughly stable demand from chemistry and irregular export demand), preventive maintenance of pipe or washing lines and prevention of defusing and saturation in the tanks of the delivery pipe station. We propose a daily used DSS that encapsulates two models to meet the expedition program at least cost, considering all technical, availability, capacity, and quality constraints. The production program meets this expedition program at least cost by determining the SO and routing for each line assigned to an order.通过一条总长187公里的管道，以抽送流模式（pull-flow mode）开展商品级磷酸矿石（phosphoric merchantable ores，简称MO）的生产与转运，对于隶属于摩洛哥OCP集团的全球同类规模最大基地而言，是一项极具挑战性的核心战略任务。商品级磷酸矿石通过多条并行生产线对开采得到的原矿（Source Ores，简称SO）进行水洗制备，可通过切换不同工艺路径调整其比重与成分，随后在储罐中混合，以达到由一系列成分约束所定义的合格质量标准。该配料问题具备独特性：其考虑了水洗工序优先于配料的两步式生产流程，这一流程的约束性强于先配料后水洗的传统模式。管道转运计划需明确待运输批次及其调度方案，同时需兼顾下游需求（化工行业需求相对稳定，出口需求则波动无规）、管道或水洗生产线的预防性维护，以及避免输送管道站储罐出现超压与饱和工况。我们提出了一套每日启用的决策支持系统（Decision Support System，简称DSS），该系统集成了两类模型，可在满足所有技术、可用性、产能与质量约束的前提下，以最低成本达成发运计划目标。生产计划通过为每条分配至订单的生产线确定原矿选型与工艺路径，以最低成本达成发运计划的既定要求。