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Apa yang dimaksud dengan Ekstraksi Tungsten?

Waktu terbit: 01 November 2018

Tungsten, known for its exceptional hardness and high melting point, is a critical metal used across various industries from manufacturing to aerospace. However, extracting this valuable element from its ores requires specialized knowledge and techniques. Understanding tungsten ore composition and the extraction process is essential for optimizing recovery and ensuring efficient production. In this comprehensive guide, we’ll explore the fundamentals of tungsten minerals, their classification, and the advanced processing methods used to transform raw ore into high-grade tungsten concentrate. Whether you’re in mining operations, metallurgy, or simply interested in mineral extraction, this article provides valuable insights into the complete tungsten processing workflow.

Understanding Tungsten Ore

Tungsten minerals primarily exist as tungstates. There are only a few cations that can bind to the [WO4]2- complex anion during mineralization, mainly Ca2+, Fe2+, Mn2+, Pb2+, followed by Cu2+, Zn2+, Al3+, Fe3+, Y3+, and so on.

There are only 20 kinds of tungsten minerals and tungsten-bearing minerals in the Earth’s crust, namely wolframite, scheelite, tungsten-manganese ore, tungsten iron ore, and so on.

  • Scheelite group: Scheelite (perovskite), molybdenum scheelite, copper scheelite;
  • Wolframite group: Black tungstenite (tungsten-manganese-iron ore), wolframite, and wolframomanganite; it is a mixture of iron tungstate (FeWO₄) and manganese tungstate (MnWO₄) as isomorphous twins.
  • Tungsten minerals: tungsten, water tungsten, iron tungsten, yttrium tungsten, copper tungsten, hydro tungsten aluminum ore;
  • Unusual tungsten minerals: tungsten lead ore, clinoptilolite, molybdenum tungsten lead ore, tungsten zinc ore, tungsten bismuth ore, antimony tungsten pyrochlore, titanium yttrium thorium ore (containing tungsten). Tungsten) and tungsten sulphide ore.

Meskipun lebih dari 20 jenis mineral tungsten dan mineral yang mengandung tungsten telah ditemukan, wolframite dan scheelite adalah satu-satunya yang memiliki nilai ekonomis untuk ditambang. Wolframite (Fe, Mn) WO4, mengandung WO3 76%; scheelite CaWO4, mengandung WO3 80,6%.

Tungsten is a widely distributed element, found in almost all kinds of rocks, but its content is relatively low. It is possible to form deposits as commercial ore by enriching the geological processes.

Tungsten ores are mainly divided into wolframite and scheelite. Wolframite is the most important ore for extracting tungsten. It is also called wolframite. Wolframite is brown to black with metallic or semi-metallic luster. Scheelite is granular in shape, white with yellow and fat luster. Orange, double cone-shaped crystals with large crystals and transparent, deep orange. Coexisting with calcite, muscovite, and black cassiterite, scheelite and calcite fluoresce. Heated or UV-irradiated, slightly purple. It is the main raw material for tungsten smelting.

Bijih tungsten

How is Tungsten Extracted?

Tungsten ore processing methods are mainly hand selection, aviation model selection, gravity separation, flotation, magnetic separation, and electrostatic separation.

In the tungsten processing plant, the extraction of wolframite is mainly gravity separation, while white ore is mainly flotation. To comprehensively extract useful components and improve the product quality and recovery rate of tungsten concentrate, the combination of mineral processing and smelting technology improves baking and leaching and other wet refining methods.

In general, tungsten ore processing uses gravity separation. For tungsten ore with a high degree of dissociation of the monomer, the ore dressing is basically the same as the ore dressing of gold ore, and a better ore dressing index can be obtained by simple screening. For the extraction of tungsten ore with a low dissociation degree, it is often necessary to break the secondary structure by bar grinding and other processes to improve the recovery rate and concentrate grade.

The basis of the gravitational separation of sand tin ore processing machine is also the principle of gravity separation. According to the specific gravity difference between tin ore and waste stone, the proportion of tin and waste stone in the tin deposit is very good, and the method and equipment of heavy separation in the tin ore processing plant can obtain the beneficiation effect.

At the same time, the advanced tungsten ore processing plant has the advantages of high efficiency, energy savings, environmental protection, and so on; the equipment investment is low, and the operating cost is low. It is an ideal choice for the beneficiation of sands.
The equipment for gravity separation of sand tin ore is mainly a konsentrator jig. Sometimes, the rocking bed is also used to improve the recovery rate of fine-grained tin ore. The technological process of gravity separation for sand tin ore is screening, jigging, and dewatering. For sand tungsten ore with a low degree of dissociation, two re-election processes are often needed: screen jig, rod milling, jigging, and dewatering.

Perusahaan Mesin Tambang JXSC in China has more than 40 years of professional experience in tungsten ore processing plants, designs a full set of tungsten ore process flowcharts, provides a complete set of tungsten ore processing plant, can send an engineer to the mine site for equipment installation and commissioning guidance. Have already built many tungsten ore processing plants in the world, including China, Brazil, Bolivia, Malaysia, Nigeria, Myanmar, Australia, Mongolia, Kenya, etc.

Alluvial Tin/Tungsten Ore Processing Plant

Below is the flowchart that JXSC Engineers recommends for the tungsten ore processing plant
Ekstraksi Tungsten

Rock Tungsten Ore Processing Plant

Tungsten ore processing plant, the extraction of tungsten flowchart is as below
Feeding -> Crushing-> Grinding-> Primary Separation -> Final Concentration -> Upgrading

The feeding way, primary separation, final concentration, and tungsten ore refining process are almost the same as above alluvial/sand tungsten ore processing plant.

Below are the crushing and grinding stage descriptions for rock tungsten ore processing plant:
Menghancurkan: For crushing the big Tungsten ore stone to a smaller size before grinding.
Crushers can be rough rock Tungsten ore jaw crusher, rock Tungsten fine jaw crusher, rock Tungsten cone crusher, rock Tungsten hammer crusher, roller crusher rock, depending on the rock Tungsten ore feeding size and process capacity to use which kind of crusher.

Grinding: After crushing the stone to a smaller size, need to grind to be ground into powder by a tin ore ball mill grinding machine, wet pan mill, or other rock grinding machine, so the tungsten concentrate can be released from the stone. Then go to the gold separation machine and concentration machine( Tungsten ore shaking table).

Tungsten extraction requires tailored approaches based on ore type (wolframite vs. scheelite) and mineral liberation characteristics. The research has a positive effect on the extraction of tungsten from scheelite, the extraction of tungsten from molybdenum, the extraction of tungsten from wolframite, extraction of molybdenum and tungsten. Continuous testing remains essential for optimizing each deposit’s processing strategy. 

As global demand for tungsten continues to grow, advancements in extraction technology play a pivotal role in meeting industry requirements while maintaining environmental responsibility. The process from ore to pure tungsten involves multiple stages of separation and refinement, each requiring specialized equipment and expertise. Companies like JXSC dengan more than 40 years of tungsten processing experience demonstrate how combining traditional gravity methods with modern techniques can achieve optimal recovery rates. For operations looking to improve their tungsten extraction efficiency or establish new processing plants, continuous testing and customized solutions remain key to success in this specialized field. As we’ve seen, every tungsten deposit presents unique challenges that call for tailored approaches – underscoring the importance of thorough mineralogical analysis and process optimization at each extraction stage.

Berita lainnya: Bagaimana Cara Menggunakan Tailing Tungsten?

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