Head grade The average grade of ore fed into a mill. Heap leaching A process whereby valuable metals, usually gold and silver, are leached from a heap, or pad, of crushed ore by leaching solutions percolating down through the heap and collected from a sloping, impermeable liner below the pad.
Cone Crushers. The Xinhai Cone Crushere into almost universal use during the last few years for the final stage of crushing. It is a development of the secondary gyratory crusher, which is merely a small gyratory crusher designed to break the product of the primary machine down to about 1½ in. size but the main shaft of a cone crusher instead of being suspended from a spider is
Food is any substance consumed to provide nutritional support foranism.Food is usually of plant, animal or fungal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals.The substance is ingested byanism and assimilated byanism's cells to provide energy, maintain life, or stimulate growth.
Jun 20, 2018· Purchase machinery, equipment, tools, parts, supplies, or services necessary for the operation of an establishment. Purchase raw or semi finished materials for manufacturing. Excludes Buyers and Purchasing Agents, Farm Products 13 1021 and Wholesale and Retail Buyers, Except Farm Products 13 1022.