Are you interested in tantalum production? We offer to buy tantalum from specialized warehouses of the supplier Evek GmbH with delivery to any city. Full compliance with modern quality standards. Supplier Evek GmbH offers to buy rare-earth metals, the price is optimal in this segment of rolled metal products.

Acid processing of ore

Extraction and purification of tantalum, including separation from niobium in existing tantalum-containing mineral concentrates, is usually carried out by treating ores with a mixture of hydrofluoric and sulfuric acids at elevated temperatures. This causes tantalum and niobium to dissolve in the form of complex fluorides and also dissolves numerous impurities that are present in the feedstock. Often the source ore also contains other elements, such as silicon, iron, manganese, titanium, zirconium, uranium, thorium, rare earth metals, etc.

Extraction

The next step is extraction processing. Methyl isobutyl ketone or the liquid ion exchange method is used as a solvent. The result is a highly purified solution of tantalum and niobium. Tantalum in solution is contained as TaF fluoride or potassium salt (_{K2 TaF7}) or oxide (_{Ta2 O5}). Evek GmbH offers tantalum in the required volume and concentration. Economically reasonable prices from the manufacturer are available. The supplier provides prompt delivery of products to the address specified by the customer.

Neutralization

If necessary, niobium is extracted as niobium oxide (_{Nb2 O5}) by neutralisation of the niobium fluoride complex with ammonia and the formation of hydroxide, followed by calcination. Extraction of tantalum from mineral concentrates and high-grade tin slag is done mainly by treatment with hydrofluoric acid solution followed by liquid extraction with methyl isobutyl ketone (MIBK). This procedure effectively recovers both tantalum and niobium as separate streams. In this step, the tantalum is in phthophthalic acid solution, from which either potassium fluoride (by adding potassium chloride or fluoride) or _{Ta2 O5} pentoxide (by adding ammonia) can be precipitated.

Reduction from salt solutions

An important step in the production of tantalum is its reduction by electrochemical method - electrolysis of fluoride (_{K2 TaF7} The reduction product is a powder, which is further compacted by pressing, vacuum sintering and successive melting. Depending on the circumstances, melting is carried out either by arc casting (by excitation of an electric arc in a vacuum) or by electron beam melting.

Enrichment

Enrichment of _{Ta2 O5} oxide, which contains less than 10%Ta, is first carried out by tantalite synthesis in several steps of reduction and removal of impurities. The final product contains more than 20% Ta (the rest is niobium oxide _{Nb2 O5}). This concentrate is recycled. Very low-grade slag (containing less than 1% _Ta205) can currently only be processed by one company (H.C. Starck Berlin) in Germany.

Hydrogenation

Tantalum scrap is treated by hydrogenation to make the metal more brittle. The semi-finished product is then ground and then dehydrogenated under vacuum. Pure tantalumjdsqq scrap can be recovered by direct hydrogenation. However, the scrap must first be treated to remove various metallic and non-metallic impurities.

Tantalum carbide.

It can be obtained in several ways, the most common of which is a solid-phase reaction between tantalum oxide and carbon. The reaction is carried out in a vacuum or in a protective atmosphere at temperatures of 1600 °C or higher. Under similar conditions, carbide can also be obtained by interacting metallic tantalum directly with carbon.

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We offer to buy tantalum, the price - determined by the technological features of production without including additional costs. The website of Evek GmbH displays information on the latest arrivals of products. It is possible to order rolled tantalum of any metal. We invite to partner cooperation.