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(1) Optional test. Generally completed by the geological exploration department. In the stages of geological survey, preliminary survey and detailed survey, the depth of optional test research should be gradually improved and deepened. The optional test focuses on the research and exploration of the differences in the nature and selectivity of various types and grades of ore, the basic beneficiation methods and the possible mineral processing indicators, the difficulty of eliminating harmful impurities, and the possibility of comprehensive recovery of the generated fractions. The content and depth of the experimental study should be able to determine whether the exploration of the ore used in the exploration is technically feasible and economically reasonable, and can provide a basis for the formulation of industrial indicators and mineral deposit evaluation. The optional test is carried out on a diverticulum device or a small test facility and is generally only used for mineral deposit evaluation.
(2) Laboratory small-scale process test. The laboratory small-scale process test is performed after the completion of the ore geological exploration, before the feasibility study or preliminary design. It focuses on the ore mineral characteristics and beneficiation process characteristics, beneficiation methods, process structure, mineral processing indicators, process conditions and products (including some intermediate products) for experimental research and analysis, and should be tested in comparison with two or more programs. The content and depth of the experimental study. Generally, it should be able to meet the requirements of preliminary formulation of process flow and product plan, selection of main process equipment and comparison of design schemes in the design work. Because the small-scale laboratory test in the laboratory is small in scale, small in sample materials, large in flexibility, and low in manpower and material resources, it is allowed to carry out extensive exploration in a wide range, and because the sample is easy to mix, the batch operation conditions are easy. Control is therefore the most basic test of each test. However, it is carried out on small non-continuous (or partially continuous) test equipment in the laboratory. The degree of simulation and the reliability of the test results are superior to the optional test, but not as long as the laboratory expands the continuous test.
(3) The laboratory expands the continuous test. The laboratory expands the continuous test by simulating the process of grinding, sorting and even dewatering operations in the industrial production process using laboratory equipment after the completion of the small-scale process test. It focuses on the beneficiation index and process conditions of the process dynamic equilibrium conditions (including the return of the mine). The ability of each test research unit to continuously test equipment is very inconsistent, generally 40-200kg/h. The laboratory extended continuous test is better than the small flow test, and the less reliable process test is higher.
(4) Semi-industrial test. Semi-industrial tests are carried out in specially established semi-industrial test plants or workshops. The tests can be continuous in the whole process or in a continuous or stand-alone semi-industrial test of inter-office operations. The purpose of the test is mainly to verify the process plan of the laboratory test, and to obtain technical and economic indicators similar to the production, to provide a reliable basis for the design of the concentrator or to lay the foundation for further industrial testing. The equipment used in the semi-industrial test is a small industrial equipment. The scale of the pilot plant is not clearly defined, and is generally 1-5 t/h.
(5) Industrial test. Industrial test is a partial or full-process test conducted in a specially established industrial test plant or a series or even a whole plant using a production ore dressing plant. Since the equipment, processes, and technical conditions are not the same or the future designs are basically the same, the technology is Economic indicators and technical parameters are more reliable than semi-industrial tests.
(6) Single-item technical test of mineral processing. The single-item technical test of mineral processing includes single new technology test and single target technical test, and the single new technology test includes new equipment, new technology, new medicine, new material test and so on. Any new technology that has no experience in use must adhere to the principle of “all passing the test†and take the most technical identification data, and the design unit is determined to be reliable before it can be used in the design.
Table 1 Requirements for beneficiation design of the beneficiation process 
Table 2 Requirements for the scale of single mineral technology design of mineral processing design
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