Research On Ore Supply Chain Equilibrium

Iron and steel industry, one of the world's most important manufacturing, plays an important role in the national economy. At present, China's steel industry is facing severe challenges, as the international iron ore prices soaring; the cost of the steel industry remains high. In order to prevent iron ore prices continuing rising, major steel mills accumulate a large number of mineral raw materials, at all ports and internal, which brings great disequilibrium risk to the ore supply chain. Faced with such difficult situation, iron and steel enterprises must adopt effective methods to reduce the disequilibrium degree of the supply chain, reduce costs, expand profits, and to protect mineral equilibrium and harmonious operation of the supply chain. The content and results of the dissertation are as follows:The definition of supply chain equilibrium was provided. The characteristic of supply chain equilibrium was concluded. Four influencing factors of supply chain equilibrium were identified, i.e. uncertain supplies, uncertain demands, information asymmetry and competencies match. The intrinsic relationship of the key links (supplier selection, transportation, stock, blending optimizing and early warning management mode) supply chain equilibrium were explored by setting up the administrative levels model of ore supply chain equilibrium, which consist of strategic level, supporting level and operation level.Current disequilibrium of ore supply chain was analyzed. And the problems of disequilibrium of ore materials supply, transportation and stock became the main aspect of this study. The suppliers without cooperation spirit, unscientific stock control strategy, and unreasonable plan of transportation or blending are regarded as the main reasons for the disequilibrium phenomenon.On the basis of analyzing the characteristics of the ore supply chain and the resource properties of the mineral products, the conception of equilibrium supply of competitiveness can be introduced, and classification matrix can be constructed, then from "equilibrium supply of competitiveness" and "ore grade" this two dimensions, the categories of suppliers can be analyzed. The evaluation index system based on the "group closeness" is established to give a comprehensive evaluation of suppliers. By using a comprehensive evaluation model based on improved group ideal solution, according to the different preferences of the experts, "group closeness"can be introduced to choose the suppliers under the equilibrium of the supply chain. Considering the disequilibrium status of large stock of supply chain inventory for the ore and a long period of stockpiling, using the method of echelon inventory control, and on the basis of inventory equilibrium constraints, a model based on the random demand of multi-species non-linear programming for two-echelon inventory can be established, multiple suppliers and a production company formed upstream supply network links the equilibrium inventory level has been studied, then optimization strategy of inventory equilibrium can be formulated for production company and its suppliers.According to transport disequilibrium phenomenon, combinatorial optimization is adopted, and Transportation-distribution model is set up.The integrated optimal transportation plan of ore transportation manner, traffic volume distribution, route choice and transportation cost is proposed.Early-warning management of ore supply chain equilibrium model has been researched. Besides, equilibrium evaluation indicator system which includes stockyard storage and stockpiling period is build; real time early-warning method has used to supervise warning indicators to prompt disequilibrium risk and coping strategy. At last, mathematical programming model of blending proportioning is applied to give preference to disequilibrium ore so as to lower disequilibrium risk.The research of this article gives scientific basis for running ore supply chain equilibrium management of re supply chain; provides new idea for "Destocking" of steel industry. Furthermore, it has wide application prospects.