Enrichment of tungsten-molybdenum ores
Tungsten and molybdenum are strategically important metals that have found wide application in various industrial sectors due to their outstanding physical and chemical properties such as high strength, heat and corrosion resistance.
Tungsten is widely used in the production of cutting tools (drills, cutters) and heat-resistant, high-strength alloys used in aviation and rocket science. It also plays an important role in the production of armored steel and some types of ceramic materials. Molybdenum is widely used in metallurgy to improve the strength, heat and corrosion resistance of steels. It is also used in alloys used in the production of catalysts, electronics and chemical industries.
The mining industry is currently facing a number of major challenges, especially in the development of tungsten and molybdenum deposits.
Current Challenges
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Technological aspectsHigh cost of extraction - the need for energy-intensive mining, milling and metallurgical processing technologies results in significant costs
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Economic aspectsTungsten and molybdenum prices can be volatile, creating risks to investment and operations, so a balance between recovery efficiency is important, economic viability and environmental safety
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Environmental responsibilityMining operations can have a negative impact on the environment, requiring the implementation of strict environmental protection measures
Enrichment
The process of beneficiation of tungsten and molybdenum ores is a complex technological procedure, the scheme of which is determined by the mineralogical composition of the ore, the grain size of useful minerals and the complexity of the ore. The choice of enrichment methods is dictated by the type of ore, its mineralogical composition and the required degree of metal concentration, and the variety of ore types require different technological approaches to their enrichment.
The development and implementation of innovative technologies for beneficiation of tungsten and molybdenum ores, such as X-ray absorption (XRT) separation and other advanced methods, is a priority for improving the efficiency of mining these strategic metals.
The application of XRT technologies will allow mining companies to optimize recovery processes, reduce operating costs, minimize negative environmental impact and improve competitiveness, while an integrated approach, including the use of advanced beneficiation technologies, detailed analysis of geological data of deposits and optimization of technological processes, will create a more sustainable and efficient tungsten and molybdenum mining system.
Principle of X-ray absorption separation of mineral raw materials:
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The principle of X-ray absorption separation of minerals is based on the analysis of differences in the ability of different minerals present in the ore to absorb X-rays. This method allows to identify valuable mineral components and determine their percentage ratio in the sample.
The efficiency of X-ray absorption (XRT) separation is due to the fact that minerals with higher atomic number (Z), effective atomic number (Zeff) or X-ray density (ρx) show an increased ability to absorb X-rays.
X-ray absorption separation analyzes the intensity of the X-rays that pass through the ore/rock samples using an X-ray detector that converts the X-rays into electrical signals. The information obtained is processed by specialized software of the automated control system (ACS).
As a result of data processing, the system identifies useful mineral inclusions in the sample and determines their percentage of the total area. By comparing the values obtained with a preset separation threshold, the ACS classifies the sample as “concentrate” or “tailings”.
After classification, the sample is directed to the appropriate compartment (concentrate or tailings) by means of a pneumatic separator.
The technology of preliminary XRT enrichment of tungsten and molybdenum ores is the most efficient:
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Ore processing
XRT separation is used for pre-processing of vein ores containing wolframite (Fe,Mn)WO₄ and/or scheelite (CaWO₄) and/or molybdenite (MoS₂), especially those in a quartz matrix. The technology is also suitable for vein disseminated, greisen and skarn ores characterized by sufficient contrast.
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Concentrate finishing
XRT can be used to improve the quality of concentrates produced by flotation or gravity separation.
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Tailings recycling
XRT separation is advantageous for processing low-grade ores, allowing for reduced processing volume.
Advantages of X-ray absorption (XRT) separation of tungsten and molybdenum ores:
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High efficiency and cost-effectiveness
X-ray separation technology (XRT) is characterized by high efficiency in the separation of ore materials. It provides selective separation of fragments with higher content of wolframite, scheelite and molybdenite, even in the presence of minerals with similar physical characteristics. The use of XRT separation allows to increase the content of WO3 and MoS2 in the concentrate up to 20-30% due to the removal of a significant amount of waste rock. This leads to an increase in the concentration of valuable components in the feed material, which optimizes the processing volumes at subsequent production stages and increases the efficiency of the entire technological process.
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Environmental friendliness
Minimizing the volume of material handled in subsequent processing stages of recycling reduces waste and allows for better control and management of emissions and discharges.
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Productivity
Improved feed material characteristics lead to a higher quality and purer finished concentrate and allows more efficient methods to be applied, e.g. pretreatment/processing can prepare the ore for more selective and efficient methods.
Conclusion
The hardware solution of IC Burevestnik of X-ray absorption (XRT) separation technology for preliminary enrichment is a promising method of enrichment of tungsten and molybdenum ores. This technology improves the efficiency of further recovery of tungsten and molybdenum, reduces production costs and improves environmental safety. The range of X-ray absorption separators produced by IC Burevestnik allows implementing XRT technology at various deposits with different ore characteristics and at processing plants.
