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Gold ores

GermanyBonn, Düsseldorf and North Rhine and Westphalia
  1. WIOTEC® ENSE GMBH & CO. KG

    Germany

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    Flexibility is one of our top priorities. If you are looking for fixed dates, short lead times, prototype production or you want to have large or small quantities of wide-ranging geometries processed, then we are the perfect partner for you. We offer the following surface coatings: Nickel, chrome, WICROM black (anthracite-colour based on trivalent chromium), gold, copper, brass, tin (gloss and matt), zinc/thick-film/with and without sealing coat. We are specialists in the professional finishing of a wide range of products and base materials: Iron, copper, brass, aluminium, zinc diecasting, aluminium diecasting. Other individual services available: Sorting, packaging, commissioning. Construction of assemblies. Marking and labelling. Plugging and unplugging tubes. Impressing and imprinting plastic parts. Threadlocking.

  2. ROHRBEARBEITUNG KETTERER

    Germany

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    Rohrbearbeitung Ketterer – abrasive cutting test centre/Abrasive cutting for tool and machine building – Wet or dry cutting. We are certified to ISO 9001. Series production runs and prototype development for the automotive, aero-engineering and other industries. We are the specialists in processing hard-to-cut materials. Stainless steel, nickel, titanium, molybdenum, tungsten, vanadium, tantalum, niobium, gold, carbide and also ceramic and composite materials such as CFK or GFR. Pipes with wall thicknesses from 0.1 mm. Outer diameters from 1.0 mm to 200 mm. Cutting lengths from 3.0 mm. Calibration, expanding, notches, hole punching. Series production: Cutting tube-formed parts on 3D-formed clamping devices. Manufacturing pipe elbows from tube coils. Carbide blanks. Up to 40 mm outer diameter. Tool manufacturing: Quick-change fixtures with 3D-milled forms according to your dataset. Pneumatic clamping and cooling water supply on the standard base block. Machine building: Individual construction according to customer requirements. Manual machine – manual cutting with pneumatic clamping – for quick-change devices. Half-automated machines/manual cutting/clamping and pneumatic/electric feed. Fully automated (also with robotic handling system) for large-scale production.

  3. COFERMIN ROHSTOFFE GMBH & CO. KG

    Germany

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    About COFERMIN Chemicals GmbH & Co. KG: We take raw material provision personally. For the needs of our customers, be this minerals, chemicals or additives, we develop sustainable solutions when it comes to acquisition. We create effective, transparent and cost-optimised access routes for our suppliers to the markets relevant for them. Cofermin incorporates core competences in the following product groups: – Chrome oxide and other metal oxides, such as cobalt oxide, copper oxide and titanium dioxide – Corrosion inhibitors and metal passivators, such as benzotriazole, tolyltriazole and benzimidazole – Boric acid – Fluoric products such as cryolite and fluorspar – Cerium oxide – Lithium chemicals, such as lithium carbonate and lithium hydroxide – Silver products, such as silver nitrate, silver sulphate and potassium silver cyanide – Chemical catalysts such as palladium chloride, palladium nitrate, hexachloroplatinate solution, rhodium nitrate and other precious metal catalysts – Sodium benzoate and benzoic acid – Sodium molybdate and ammonium molybdate – Turkey-red oil, rapeseed oil, fish oil and other sulphated fatty acids – Calcium formate – Gold chloride – Polyvinylalcohol (COVINOL; PVAL/PVOH) – Titanium dioxide, anatase and rutile (chloride and sulphate processes) – Lignosulfonate, various types (solid and liquid) – Polycarboxylate, various types (solid and liquid) – Nitrilotriacetic acid (NTA). Cofermin is: – Winner of the German foreign trade prize – ISO 9001-certified – Responsible Care-certified