In addition to being an important partner in the venture, Vale is responsible for supplying the iron ore to be used by the steel mill complex, through a 15-year contract signed with ThyssenKrupp.
In addition, BBD Ball mill milling system is a nonlinear, large delay, large inertia and strong coupling charged object, it is very difficult to implement optimization control.
此外，双进双出磨煤机制粉系统是一个非线性、大延迟、大惯性、强耦合的被控对象，其优化控制非常困难。
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In addition, the mill may transitionally work in a state of single driving roll, which will greatly aggravate the chattering.