【摘要】 <正> The dynamic behavior of grinding circuits is an important consideration in the development of process automation. The influences of the feed rate, sump water addition, and circulating load on some important process variables, such as product particle size, pulp flow rate and density, have been investigated with a great amount of dynamic data from an industrial closed grinding circuit collected by a microcomputer sampling system. The transfer functions of the circuit were also established, in which parameters were estimated recursively by the instrumental variable technique. The results showed that the fresh feed rate was the main manipulating variable governing the dynamic behavior. The control of circulating load is one of the feasible approaches in the process optimization of closed grinding circuits. Some manipulating and control strategies were also discussed.更多还原

【Abstract】 The dynamic behavior of grinding circuits is an important consideration in the development of process automation. The influences of the feed rate, sump water addition, and circulating load on some important process variables, such as product particle size, pulp flow rate and density, have been investigated with a great amount of dynamic data from an industrial closed grinding circuit collected by a microcomputer sampling system. The transfer functions of the circuit were also established, in which parameters were estimated recursively by the instrumental variable technique. The results showed that the fresh feed rate was the main manipulating variable governing the dynamic behavior. The control of circulating load is one of the feasible approaches in the process optimization of closed grinding circuits. Some manipulating and control strategies were also discussed.更多还原