Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B1/00—Preliminary treatment of ores or scrap
  • C22B1/02—Roasting processes
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B41/00—Obtaining germanium

Definitions

• the invention relates to a method for obtaining a processable germanium concentrate.
• Germanium occurs as an accompanying element in concentrations of a few ppm in some deposits of sulfidic ores of the metals lead, copper and zinc.
• Known Ge minerals are e.g. B. argyrodite, canfieldite, germanite and renierite. When processing the raw ores, the germanium minerals are concentrated in concentrates together with the sulfides of the main metals lead, zinc and copper.
• the concentration of germanium only reaches such high values in the concentrates in a few particularly rich crude ores that a direct separation of the ge from the concentrates is technically possible and economically justifiable.
• Germanium is also sulfidically condensed and separated from the exhaust gas in a nonoxidizing atmosphere. Together with the germanium sulfide, arsenic compounds and, depending on the temperature used, PbS are also sublimed. In most lead, zinc and copper concentrates, however, the germanium contents are so low that Ge enrichment and separation from the concentrate are out of the question. Germanium often accumulates in intermediate or Waste products from the processes for extracting the main metals.
• the fly ash generated in addition to the main components of lead oxide and zinc oxide are other volatilizable metal compounds such as i - for example, those of arsenic, antimony, cadmium and Germaniums_
• Such flue dusts are next geröstesten zinc ores in hydronteta turgisch-e often Ektro used ytician zinc recovery! .
• the dust is leached with sulfuric acid, and germanium is precipitated and enriched from the solutions.
• Germanium goes into the final slags of lead reduction. Germanium, together with lead and zinc, can be evaporated from them by a slag blowing process and, after oxidation and condensation, enriched and separated in a flying dust. The further concentration of germanium then takes place, as already mentioned several times, by leaching with sulfuric acid and germanium separation by z. B. Wood extract precipitation.
• Ge concentrate production is very often carried out via intermediate products of metal extraction. Their composition and ge content can only be controlled to a limited extent. Many enrichment steps are required to produce a Ge concentrate with 10 to 20% Ge.
• the object of the present invention is to propose a method which, in a very simple and direct manner, makes it possible to extract germanium from sulfidic concentrates.
• germanium-containing sulfidic concentrate is mixed with such an amount of soda that the sulfur content is bound as sulfate and then the concentrate is roasted under oxidic conditions, the roasted material is leached with sulfuric acid and germanium is precipitated from the solution.
• the mixture is roasted with sufficient air supply in the temperature range between 850 K and 1200 K, preferably at 1000 K.
• the roasted material can be subjected to comminution before the sulfuric acid leaching, and the sulfuric acid leaching is carried out at temperatures between 313 and 370 K and the amount of sulfuric acid is such that an H 2 to 4 concentration in the solution after the leaching at least 5 g / t is included.
• the process would be such that, for example, a copper concentrate with a certain low content of germanium is mixed with a soda amount sufficient to bind the sulfur of the concentrate as sulfate and this mixture is then roasted under oxidizing conditions , whereby the metal sulfides pass into the oxides.
• a roasted product is formed which contains not only the sulfur but also the metals of the concentrate. This roasted material is leached with sulfuric acid, and so much sulfuric acid is added that a pH of approx. 1 is reached.
• Germanium goes into solution. Germanium can be obtained from the solution thus produced by a suitable precipitant, such as. B. the frequently used tannin can be precipitated. Small amounts of copper, arsenic, iron and zinc are also precipitated.
• the precipitation product is further processed into the actual germanium concentrate in a manner known per se by drying and annealing.
• sulfidic copper concentrate 100 parts of a sulfidic copper concentrate, approximately the following composition are mixed with a sufficient amount of soda (Na-CO-) and then roasted with air.
• the example shows that very little Ge was evaporated in this way of working.
• the roasted product thus produced is then leached in a ratio of solid: water like 1:10 after comminution and so much concentrated sulfuric acid is added that a pH of less than 1 is established at the end of the leaching.
• the leaching is preferably carried out at elevated temperatures, but can also be carried out at room temperature.
• the filtrate based on the amount used in the roasted material, contained 94% of the Ge of particular interest. The total yield of the solution was therefore 89% Ge.
• Ge is precipitated from this solution by adding a tannin solution.
• the precipitated tannate contained
• a concentrate was obtained by drying and annealing the tannate, the enthieit ⁇ This material corresponds to commercially available concentrates.
• Example 2 The same germanium-containing copper concentrate as in Example 1 was mixed with an amount of soda sufficient for binding sulfur and then roasted with air.
• the roast contained well As in Example 1, very little germanium was volatilized.
• the roasted product produced became a 1:10 ratio of solid: water after adding 40 ml of concentrated sulfuric acid per 100 g of roasted product.
• a fat product was produced from the clear solution in a manner known per se by adding a tannin solution contained.
• This material corresponds to commercially available Ge concentrate qualities that can be further processed using chlorine style tatton.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Geochemistry & Mineralogy (AREA)
• Geology (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Manufacture And Refinement Of Metals (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6236589

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (1)

Citations (5)

Family Cites Families (1)

• 1984
  • 1984-05-23 DE DE3419120A patent/DE3419120C1/de not_active Expired
  • 1984-11-23 ZA ZA849151A patent/ZA849151B/xx unknown
  • 1984-11-27 DE DE8484114333T patent/DE3481922D1/de not_active Expired - Fee Related
  • 1984-11-27 AT AT84114333T patent/ATE51898T1/de not_active IP Right Cessation
  • 1984-11-27 EP EP84114333A patent/EP0162954B1/fr not_active Expired - Lifetime

Patent Citations (5)

Also Published As

Similar Documents

Legal Events