Ore dressing test mainly includes preparation before test, test process and test result.
Ore dressing test is an important technical basis for the construction and production of ore dressing plant.By determining the properties of raw ore, we could master the properties and types of ore and determine the recoverable valuable elements. According to the test results, the beneficiation process is formulated to ensure the ore recovery rate and provide technical support for design and production.
The chemical laboratory has such a complete set of modern advanced equipment as crusher, fine grinder, roaster, dryer, spectrometer, atomic fluorescence spectrometer, atomic absorption spectrophotometer, infrared ore analyzer and detector, etc. The mineral processing research institute has a sample crushing room and can conduct rock ore identification, Bond grinding work index test, intelligent laser particle size detection and so on. Optimal mineral processing technology will be provided after various mineral processing tests including gravity concentration, magnetic separation, flotation, cyanide leaching and adsorption, bacterial oxidation, acid leaching and wet mineral processing, special mineral processing, dump leaching, tailings thickening and dry tailings stacking.
Special and innovative test schemes are customized based on different ore properties. Up to 29 schemes have been designed for gold mine processing.
The clients should provide about 50kg representative samples, some special samples about 200~1000kg. The simple test needs 30 working days, and the detailed test about half a year.
Sign the test contract with clients before the mineral dressing test, and make sure dressing process to test
Chemical Lab of Mineral Dressing Research Institute analyzes the material components (ore structure, mineral and types of ore) and chemical properties (elements, the particle size screening, density, ore relative grindability) of crude ore, and gets some data for the subsequent beneficiation test.
After the working of Chemical Lab, Mineral Dressing Research Room takes the mineral beneficiation test which tests the optimum conditions of dressing process. Testers take the exploratory testing at first relying on rich experience, and then the detailed testing including grinding fitness, reagent dosage, open and closed circuit test, etc. After obtaining the final products，testers should analyze them to get the recovery rate, and then take sedimentation test of concentrate and tailings as references of equipment selection.
After finishing all the tests, Mineral Dressing Lab writes a detailed “Mineral dressing test report” by summarizing the test process. In the last part of test report, the optimum technological process and technological parameters are presented.
" Mineral dressing test report" is an important basis of next mine design, and brings significance of guiding actual production.
Each dressing test of Mineral Dressing Research Institute is in strict accordance with the following steps (the following table data is from the relevant dressing test data of a client)
This part is described as preparation of sample used in test. The following sample process flow chart and preparation table is provided for clients
Preparation of sample
Sampling and processing flow chart of crude ore of mineral dressing test
Test sample details and analysis results
The crude ore properties determination includes: ore material component determination and ore chemical properties determination.
The ore material component determination includes structures, types and components of ore, metal and non-metallic mineral characteristics. The following part of chart presents the ore material component determination
|Crusher||Broken hematite particle size (mm)||Sieve Size (mm)|
|Jaw Crusher (Primary Crushing, Secondary Crushing)||160-320||— —|
|Gyratory Crusher(Primary Crushing)||125—1450||— —|
|Cone Crusher (Secondary Crushing, Fine Crushing)||22-75||— —|
|Circular Vibrating Screen||— —||0-12|
|Auto Centering Vibrating Screen||— —||6-12|
Pyrite is hypidiomorphic Iodine
Pyrite is skeleton crystal by sphalerite metasomatism
Ore chemical properties determination includes crude ore multi-element analysis (to make sure if the ore can be comprehensively recycled and used), crude ore particle size screening analysis, ore density determination and ore relative grindability test. The following is related charts of ore tests:
Results of crude ore multi-element analysis and relative grindability test
Grindability curve and crude ore particle size screening analysis results
Ore density determination
Mineral dressing test includes exploration test and mineral dressing conditions test.
Exploration test primarily explores the mineral dressing conditions, and then gets a better process condition. The detailed test follows the process condition determination including grinding fineness test, reagent test, open circuit and closed circuit test. The following is part of the chart of exploration test and detailed test for customers.
Flotation exploration test flow chart
Grinding fineness test flow
Reagent dosage test
Open circuit test result and closed circuit result
This step takes the valuable element analysis and screening analysis of valuable mineral concentrate and tailings, and gets the recovery rate of valuable mineral.
Sedimentation test as reference of equipment selection aims to concentrate and tailings of valuable mineral. The flowing is the sedimentation test result of Pb concentrate.
Pb concentrate sedimentation test result and sedimentation curve
Tailings sedimentation test result and sedimentation curve