Ore dressing test is to sort and enrich the useful minerals in the ore by physical or chemical methods according to the properties of the ore, and determine whether it is selectable according to the test results, and determine the reasonable ore dressing method, selection conditions, selection process and the selection index that can be achieved.
The selectability test is carried out in the geological exploration stage and is of great significance to the evaluation of ore deposits. Through the study of the properties of the ore and the occurrence state of useful, beneficial and harmful components, the ore dressing test is carried out using industrially applicable process flow, which can preliminarily determine the selection method of the main useful components and the possible indicators.
In the preliminary exploration stage, the selectability test can point out the selectability differences of different types or grades of ores, and provide a basis for geological work to divide ore types and determine industrial indicators. In the detailed exploration stage, the selectability test should not only determine the processing technology, reasonable process and technical and economic indicators of the ore, but also test different types and grades of ores separately, and study the combined samples to determine the possibility of using a unified principle process for various types of ores, and provide a basis for the product plan of the mine.
Laboratory process test is to further study the method of fully and reasonably recovering ore under specific process conditions on the basis of selectivity test. This test should compare multiple schemes of process structure and sorting conditions to obtain the advancement and adaptability of methods and technologies, and the estimated economic indicators should be basically close to the actual situation.
At the same time, it is necessary to study the material composition in detail, especially the process mineralogy, and study the recovery path and method of beneficial associated components so that mineral resources can be fully recycled. The test samples should consider the mixing of surrounding rocks and intercalated stones.
For general ores, laboratory process tests are the basis for preliminary feasibility studies of deposit development and the formulation of industrial indicators; for easy-to-select ores, they can be used as the basis for mine design under the condition of meeting the basic parameters required for mine design.
The main task of laboratory expansion continuous test is to connect the process recommended by laboratory test in series to form continuous operating conditions similar to production status. In "dynamic", the balance of feeding, water supply, dosing and product quantity and quality is achieved, and its results have a certain degree of simulation and high reliability. For general ores, after completing the determination of various parameters required by the design, together with the test results, they can be used as the basic basis for mine design. For example, the capacity of continuous test equipment in each test research unit is generally 40-200kg/h. Through such tests, the mineral processing process and process conditions can be evaluated more accurately.
Semi-industrial tests are mainly aimed at ores with complex mineral processing processes. It is difficult to fully identify certain key links of the process characteristics and equipment in laboratory tests, and the reliability of these links may affect the technical and economic indicators. Therefore, it is necessary to improve the simulation degree of the test to solve it. The purpose of semi-industrial tests is to verify the laboratory process plan, obtain technical and economic indicators similar to production, provide a reliable basis for the design of the mineral processing plant, or lay the foundation for further industrial tests. The equipment used in semi-industrial tests is small industrial equipment, and the scale of the test plant has not yet been clearly stipulated, generally 1-5t/h.
Ore dressing test of existing production plants is of great significance for improving production indicators, carrying out comprehensive utilization of resources and determining the new ore body ore dressing process.
On the one hand, determine a more reasonable process system according to the change of ore properties to improve the production indicators of the ore dressing plant. For example, when the appearance of new ore bodies in the ore deposit causes the change of ore properties processed by the ore dressing plant, a more reasonable process system is determined through further experimental research.
On the other hand, study or adopt new processes and procedures, such as the use of efficient ore crushing equipment, the "combined process" for processing complex and difficult-to-separate minerals, and the use of new technologies for processing fine-grained minerals, so as to reduce losses in the ore dressing process and improve the quality of concentrates. At the same time, solve the new problems brought to the ore dressing plant by new equipment and new reagents, carry out research on the comprehensive utilization of resources, and find out the mechanism and influence of various factors that determine the ore dressing process or the operation of a certain unit, machine, etc.
