초록 ▼

A grinding system and method for grinding mineral ore which is adapted for use where ore is required to be fed for grinding from a supply source at a substantially constant rate of feed, and in which the grinding characteristics of the ore and the power required to grind a predetermined weight of th

A grinding system and method for grinding mineral ore which is adapted for use where ore is required to be fed for grinding from a supply source at a substantially constant rate of feed, and in which the grinding characteristics of the ore and the power required to grind a predetermined weight of the ore vary unpredictably during the grinding operation, comprising a primary semi-autogenous grinding mill and a primary fully autogenous grinding mill connected in parallel relation with each other to the ore supply source, first drive means for driving the semi-autogenous grinding mill, power sensing means for measuring the input power required to drive the semi-autogenous grinding mill, and means for varying the ore feed rate to the semi-autogenous grinding mill whereby to maintain the input power to the semi-autogenous grinding mill at a substantially constant value or set point. Means is provided for measuring the rate of ore flow to the semi-autogenous grinding mill with the input power to semi-autogenous grinding mill being maintained at the substantially constant value. Means is provided for comparing the measured rate of ore flow to the semi-autogenous grinding mill with the substantially constant rate of feed required to be fed from the supply source whereby to obtain a differential value; and means is provided for adjusting the rate of ore flow to the fully autogenous grinding mill to correspond to said differential value whereby to cause the sum of the ore flow rates to the primary semi-autogenous grinding mill and to the primary fully autogenous grinding mill to be substantially equal to the substantially constant rate of feed required to be fed from the supply source.

대표청구항 ▼

A method of grinding mineral ore which is adapted for use where ore is required to be fed for grinding from a supply source at a substantially constant rate of feed and in which the grinding characteristics of said ore and the power required to grind a predetermined weight of said ore vary unpredict

A method of grinding mineral ore which is adapted for use where ore is required to be fed for grinding from a supply source at a substantially constant rate of feed and in which the grinding characteristics of said ore and the power required to grind a predetermined weight of said ore vary unpredictably during the grinding operation comprising the steps of: (1) connecting a primary semi-autogenous grinding mill and a primary fully autogenous grinding mill in parallel relation with each other to an ore supply source; (2) measuring the input power required to drive said semi-autogenous grinding mill; (3) varying the ore feed rate to said semi-autogenous grinding mill whereby to maintain the input power required to drive said semi-autogenous grinding mill at a substantially constant value or set point; (4) measuring the rate of ore flow to said semi-autogenous grinding mill with said input power to said semi-autogenous grinding mill being maintained at said substantially constant value; (5) comparing the measured rate of ore flow to said semi-autogenous grinding mill with the substantially constant rate of ore flow required from said supply source whereby to obtain a differential value; (6) and adjusting the rate of ore flow to said fully autogenous grinding mill to correspond to said differential value whereby to cause the sum of the ore flow rates to said primary semi-autogenous grinding mill and to said primary fully autogenous grinding mill to be substantially equal to said substantially constant rate of feed required to be fed from said supply source.