The specific amount of ore samples required for mineral processing test depends on a variety of factors. Under normal circumstances, it is mainly considered comprehensively from the following situations：

1. A large number of ore samples are generally taken from the early mining areas of the deposit, and a small number of verified ore samples should be taken for the later mining areas.When the ore reserves of the deposit are small and the production life of the mine is short, phased sampling may not be considered.

2. Ore samples should be taken separately from different ore bodies and ore sections in the deposit to meet the mineral processing tests of different combinations.If it is not possible to mine separately or there is no need for separate mineral processing, only mixed ore samples can be taken for mineral processing tests of mixed ore samples.

3. For different types and industrial grade ores, when the material composition characteristics and ore properties are very different, they should be sampled separately according to the different types and industrial grades of the ore to facilitate the mineral processing test of a single sample or the mineral processing test of a mixed sample.

4. For different types and industrial-grade ores, when the average grade of their main components and the content of associated beneficial and harmful components are greatly different, they should be sampled separately in the mining area and the middle section divided by the mining design according to the characteristics of their grade changes, so as to facilitate the mineral processing test of a single sample or the mineral processing test of a mixed sample.If it is not possible to mine separately or there is no need for separate mineral processing, only mixed ore samples can be taken for mineral processing tests of mixed ore samples.

5. In order to maximize the use of the country's mineral resources, when there are a certain number of out-of-surface mines in the deposit, separate mineral processing test samples of out-of-surface mines should be taken to evaluate the possibility and rationality of their recycling.

6. When ore bodies, surrounding rocks, sandwich rocks, and rock veins contain precious, scattered elements and other components that can be comprehensively recovered, representative ore samples should be taken on the basis of detailed research on the survival state and spatial distribution of these associated components for comprehensive recovery. Experimental research on comprehensive recovery.

7. A certain number of ore body item bottom plate surrounding rock and sandwich rock samples should be taken to facilitate the mineral processing test according to the type, composition and proportion of waste stone mined from the deposit to be selected into the ore sample of the ore test.The amount of waste stone allocated to the ore sample shall be determined according to the waste stone mixing rate designed; when the deposit has not been designed for mining, it can generally be formulated at 5~10% for open-pit mines, 3~5% for chemical mines, and 10~25% for in-pit mines. The mixing rate of waste stone is generally formulated at 10~25%.

8. According to the requirements of the experimental research unit, a certain number of high-grade ore samples and near-ore surrounding rocks should be taken so that the experimental research unit can adjust the possible grade deviations of the ore samples or meet the temporary needs in the test.

9. Samples representing various types and grades of ores, as well as surrounding rocks and sandwich rocks of different lithology and strata, should be taken as rock and ore identification specimens.The specific requirements shall be put forward by the mineral processing experimental research unit.

10. Samples for crushing, grinding work index tests and self-grinding media tests should be taken, and the specific requirements shall be proposed by the mineral processing test and research unit.

The determination of the number of ore samples in the mineral processing test is mainly based on the above 10 aspects. In view of the complexity of taking ore samples, technicians will generally be sent for on-site guidance according to customer requirements. On the one hand, it is convenient for customers, on the other hand, it ensures the accuracy of the ore samples taken, and lays the foundation for the subsequent mineral processing process to obtain accurate data.