What are the "three rates" of a mine?

The so-called "three rates" of mining refer to the mining recovery rate, mining dilution rate, and ore dressing recovery rate. Why combine these three? This requires understanding their meanings. The mining recovery rate is the percentage of ore actually extracted within a calculated mining area relative to the geological reserves within that area. Depending on the size of the calculation area, it is divided into the recovery rate for the working face, mining area (block), stage, and the entire mine. The mining recovery rate specifically refers to the total recovery rate of the entire mine, open-pit mine, or mining bureau. The mining recovery rate is a key technical and economic indicator for measuring the quality of a mining company's mining technology and management, as well as the degree of resource utilization. A low mining recovery rate results in less ore recovery and higher costs. To reduce costs and obtain the highest output value and profit, mining companies often mine richer or less richer ore, easier or more difficult ore, thicker or thinner ore, or larger or smaller ore, leading to resource losses. A low recovery rate also shortens the mine's service life. Mining dilution rate refers to the percentage by which the grade of the actual extracted ore is lower than that of the original ore during the mining process; it is the percentage of lost industrial reserves compared to those written off. It is one of the indicators for measuring the utilization rate of underground resources. Specifically, mining dilution rate is the ratio of the difference between the geological grade of the original ore and the grade of the extracted ore within the calculated mining area to the geological grade of the original ore. During mining, due to the mixing of waste rock and gangue, loss of high-grade ore, or dissolution or dispersion of some useful components, the grade of the extracted ore may be lower than the geological grade of the ore in the industrial reserves calculated before mining. This phenomenon is called ore dilution. It is one of the indicators for evaluating the quality of extracted ore from mining enterprises and also one of the bases for analyzing the rationality of mining methods. A high ore dilution rate will reduce the quality of the final product and affect the economic benefits of the enterprise. Mineral processing recovery rate refers to the percentage by which the weight of a certain useful component in the beneficiated product (generally concentrate) is compared to the weight of the same useful component in the original ore fed into the beneficiation process. The recovery rate of mineral processing products (generally referring to concentrates) is the percentage of the mass of the recovered useful components in the ore to which that useful component is present. It is a crucial technical and economic indicator for assessing and measuring the mineral processing technology, management level, and recovery rate of useful components in the ore processed by mining enterprises. In coal mines requiring washing and beneficiation processes, it is the washed coal recovery rate. In stone mining with slab processing technology, it is the slab yield rate. Low mineral processing recovery rates lead to resource waste, increased costs, and decreased economic benefits. Therefore, assessing the mineral processing recovery rate of mineral resource mining and beneficiation enterprises is one of the key focuses of mineral resource supervision and management. In general, all three are key technical and economic indicators for evaluating mining enterprises. While their meanings differ, they are interconnected and mutually restrictive.