Adaptive control of ore mill charge

Abstract

The system of mining operations does not enable long-lasting mining of single-type ores that causes instability of mineral materials intended for concentration. To solve the problem of controlling these processes on the basis of operating data on characteristics of processed raw materials, the method of controlling mill charge is suggested considering measurements of its output product. This method is based on correlation of the output product quantity and the rate of the mill charge. The process of the object’s operation is modeled, while time characteristics of the output controlled value and the mill charge are approximated to assess accuracy of the method of determining the mill charge. The possibility to use the discrete Kalman filter is studied in order to indentify the object’s characteristics under noises by measurement results. It is shown that application of the Kalman filter to controlling the mill charge enables not only solving the problem of filtration aimed to obtain data on the object’s current state, but also predicting its state.

The study of the stress-strain state of the massif in mining uranium at “VOSTGOK” deposits

“…the room) and, on the opposite, harder ores tend to accumulate stress due to smaller deformations. However, stability of less hard ore crowns decreases due to reduction of their ultimate strength [12][13][14].…”

Development of resource-saving technology when mining ore bodies by blocks under rock pressure

“…Such techniques differ in breaking conditions and estimation criteria. Thus, when mining iron ore deposits, there are applied methods based on placing explosives in the massif depending on stress concentration, rock hardness, qualitative characteristics of explosives, etc [15,16,37].…”

“…To increase iron content in the muck, it is suggested to concentrate the mass at surface crushing and sizing plants. [16][17][18]. It should be considered that in terms of mineralogical composition there are 6-9 varieties of ore, each requiring special treatment.…”

Study of rock fracture patterns for obtaining the basis for energy-efficient ore ball milling

“…Ingenious approaches to solving similar problems are proposed in [9] and [10]. Ore slurry dilution in ball mills has long been used, but modern automated control systems (ACSs) for all mills mainly use the simplest approach to slurry dilution, designed for open grinding cycles, which does not meet the requirements of the technological process.…”