Feed grade is the average concentration of valuable minerals or metals contained in ore delivered to a processing plant for treatment. It is a critical parameter in mining and mineral processing because it directly influences recovery rates, production efficiency, and project profitability. In gold mining, feed grade is commonly expressed in grams of gold per tonne of ore. In iron ore mining, it may be reported as a percentage of iron content, while diamond feed grade may be measured in carats per tonne. Bauxite feed grade is typically expressed as alumina content and related quality indicators. Feed grade is determined through sampling, laboratory analysis, and grade control programs. Variations in feed grade can significantly affect plant performance, operating costs, and product quality. Mining companies closely monitor feed grade to optimize blending strategies, maximize resource utilization, and achieve production targets. Accurate feed grade management ensures that processing facilities operate efficiently and that economic returns are maximized throughout the life of the mine.
