Abstract: A vertical roller mill comprising a grinding table and a grinding roller having a rotational axis, each having a grinding surface and arranged to define a grinding zone between the grinding surfaces grinds particulate material. A feeder feeds the particulate material to the vertical roller mill, with the grinding roller is-arranged to roll around a grinding path on said grinding table. The feeder receives a supply of the particulate material and directs that material to flow to the grinding zone of the vertical roller mill. The feeder can constrain the flow of material to a defined cross-section by applying a momentum to and/or pushing, or to compact the flow of material prior to directing the material, or combinations thereof. In particular, the disclosure is applicable to grinding particulate materials like mining ores, industrial minerals and chemicals, sand, slag, ash, clay, pigments for coatings, pharmaceuticals and cement raw materials.

Abstract: A system for the continuous monitoring of wear is disclosed. The system comprises a flotation cell having at least one flotation component. At least one detector is provided to the at least one flotation component, and at least one sensor is provided to the flotation cell which is configured to communicate with the at least one detector during operation of the flotation cell. In use, the at least one flotation component wears away and ultimately affects a function of the least one detector. The at least one sensor is configured to monitor said function of the least one detector. When the at least one sensor detects a change in the signal of the at least one detector, an operator is notified that maintenance or flotation component replacement may be necessary.

Abstract: A system for the continuous monitoring of wear is disclosed. The system comprises a flotation cell having at least one flotation component. At least one detector is provided to the at least one flotation component, and at least one sensor is provided to the flotation cell which is configured to communicate with the at least one detector during operation of the flotation cell. In use, the at least one flotation component wears away and ultimately affects a function of the least one detector. The at least one sensor is configured to monitor said function of the least one detector. When the at least one sensor detects a change in the signal of the at least one detector, an operator is notified that maintenance or flotation component replacement may be necessary.