Mineral processing method and process test research (1) Research on mineral processing methods. Due to the development of mineral processing technology , a variety of mineral processing methods can be used to treat an ore. Therefore, in the test, according to the nature of the ore, the requirements of the user for product quality and the construction conditions, the multi-program comparison test of the beneficiation method should be selectively carried out. And choose a reasonable method of mineral processing. (2) Separation condition test: 1) Flotation: tests such as grinding fineness, slurry concentration, pulp temperature, pulp pH (pH), pharmaceutical system, stirring and flotation time should be carried out. In some cases, tests such as water reuse, water quality, drug withdrawal, mud removal, wind pressure and air volume should be used. The requirements for the test scale of the beneficiation process are shown in Table 1. The requirements for the single-technical test scale of the beneficiation are shown in Table 2. 2) Magnetic separation: Generally, magnetic induction, material inclusion size, processing capacity, material classification and non-gradation comparison test should be carried out. Wait. In addition, for dry weak magnetic separation, the influence of ore water on the selection index should be tested. The effect of ore washing and non-washing on the selection index should be tested. For wet strong magnetic separation, the slurry concentration and washing water should be carried out. Pressure and water volume, gaps in the media plate (or ball medium diameter, media fill rate), rotational speed, etc., as well as accumulation and impact tests of ferromagnetic minerals. 3) Calcination magnetic separation: The conditions of calcination atmosphere, calcination temperature, calcination time, fuel type, amount, volatile component, material particle size, etc., and related technical parameters shall be determined. 4) Re-election: tests should be carried out on the amount of ore, the size and range of the ore, the concentration of the slurry (solid-liquid ratio), the water pressure and water volume, the discharge method and the interception position. In addition, the corresponding process parameters should be tested according to the re-election equipment used. 5) Heavy medium beneficiation: The test should be carried out on the amount of ore, the size and range of the ore, the density of the heavy medium suspension, the raw materials, density, particle size, addition amount, recovery measures and consumption of the weighting agent. In addition, the corresponding process parameters should be tested according to the different heavy medium equipment used. 6)Electrical selection: In addition to the selection of the number of segments, operating voltage, pole distance and electrode position, drum speed, ore supply, particle size, temperature, temperature, etc., drum speed, voltage, and particle size should also be performed. The test of the relationship, the comparison test of the grading and non-grading of the feed, the adjustment test of the position of the mineral separation plate, and the like. 7) Light picking: First, the washing and grading is carried out, and then the comparative test of the relationship between the ore size and the treatment amount is carried out in the case where the layer is a single layer of ore. 8) Contrast test for main raw materials such as mineral processing chemicals, fuels and media: the test of different mineral processing methods and equipment should be carried out, and the main types of chemicals, fuels, media, performance, specifications, consumption, and beneficiation effects should be used. Comparative tests, select varieties with good mineral processing indicators, low prices, sufficient sources, low environmental pollution or easy to treat. (3) Experimental study on the selection process structure: 1) Determine the number of segments to be selected. 2) Discuss the reasonable number of selection and sweeping operations, try to improve the concentrate grade and recovery rate, reduce the impurity content of the product, enrich the associated beneficial components or comprehensively recover the components. Care should also be taken to maintain the self-fluxing properties of concentrates for self-fluxing or alkaline ores. 3) Identify the nature of the mine and determine the reasonable location or separate treatment plan for the return of the mine. 4) Conduct comprehensive conditions test of open circuit on the basis of sufficient unit condition test. The test should pay attention to the stability of process and operating conditions, and the index should be reproducible. 5) Conduct a closed-circuit process test based on the open-circuit process test. Attention should be paid to stabilizing the corresponding process and control conditions (preferably using a micro-continuous test device for testing). The test indicators should be reproducible, stable, and the quantity and quality indicators of the process should be balanced. (4) Recommended beneficiation process. The multi-program test should be carried out on the beneficiation method, process flow and selection conditions, and the beneficiation process should be recommended on the basis of the comparative test of the I-two schemes. The recommended process flow should include reasonable grinding fineness, concentration of each work or product, grade, partial recovery, total recovery and yield, process conditions, new water and recharge. (5) Analysis of mineral processing products. Chemical analysis, particle size analysis, phase analysis, and determination of mechanical and physical properties (such as density, bulk density, angle of repose, moisture, etc.) should be performed on concentrates, medium mines, and tailings products. Necessary fashion to deal with the ore and products of certain operations for spectral analysis, chemical analysis, gold analysis, phase analysis, particle size analysis and rock and mineral identification, etc., according to the following questions: 1) The reason why the grade of concentrate is not high, the recovery rate is low, the harmful components cannot be lowered, and the middle mine is difficult to select. 2) Enrichment direction of some companion generation points that can be comprehensively recovered. 3) Recycling and sorting depth of different minerals by certain beneficiation operations and the adoption of certain new technologies. 4. Product dehydration test research The sedimentation velocity test should be carried out on the concentrate and tailings, and the sedimentation velocity curve should be drawn. If the concentrate, medium mine or other intermediate products need to be concentrated, the above test should also be carried out. If a flocculant is added during concentration or a filter aid is added during filtration, the dosage of the agent and the test of the drug condition are required, and the effect of the backwater after the application on the flotation index is tested. 5. Environmental protection test research (1) Analyze and analyze the concentrate water, tailings water and other sewage, harmful gases and waste discharged from the process. If it exceeds the relevant provisions of national industrial hygiene standards, it should conduct a governance test. (2) For radioactive minerals, toxic minerals and toxic agents used, the radiation intensity, the degree of toxicity and the corrosiveness to metals or other substances shall be determined and protective measures shall be proposed. (3) The ore dressing test should try not to use or less the agents that are harmful to the environment, agriculture, forestry, animal husbandry and fishery, and pollute the environment, and try to conduct non-toxic and harmless beneficiation process test research, so that the process produces less pollution sources. (4) The research on environmental protection tests and protective facilities related to the beneficiation test shall be carried out simultaneously with the beneficiation test.
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