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Niobium processing, preparation of niobium ore for use in various products. Niobium (Nb) has a body centred cubic (bcc) crystal structure and a melting point of 2,468 176;C (4,474 176;F). Of the refractory metals, it has the lowest density and best workability; for this reason, niobium based alloys are often used in aerospace applications.
The process of extracting tin from tin ore varies according to the source of the ore deposit and the amount of impurities found in the ore. The tin deposits in Bolivia and England are located deep underground and require the use of tunnels to reach the ore. The ore in these deposits may contain about 0.8 1.0% tin by weight.
Extraction of tin from its ores Manchem Limited Free Patents Online 20 Jan 1987 A process for the direct recovery of tin , as an organo hydrocarbyl tin compound, from reduced but unrefined tin ores and ore slags is described,
Wet Metal Assay Techniques include a method by which the ore is turned into powder and thoroughly dissolve it in some liquid, usually an acid, or mixture of acids, and then to recognise the presence of some known metal or metals by the peculiarity of the precipitate produced, when a reagent has been added to the solution.
A process forthe extraction of tin from oresv and the like, comprising the steps of admixing the ore, containing tin in the form of mixture upon a grate in a stream of air such as to maintain oxidizing conditions throughout the charge and to carry away tin as oxide fume from the charge.
Molten tin is drawn into blocks. It contains 99.5 percent of tin metal and is called block tin. Refining of tin It is purified by liquation, poling and electrolytic refining. For very high purity, it
Jan 20, 19870183;32;7. The process of claim 1 wherein an `onium` compound is present in an amount of from 0.1 to 0.6 moles per gram atom of tin in the unrefined tin ore or tin slag. 8. The process of claim 7 wherein said `onium` compound is present in an amount from 0.2 to 0.5 moles per gram atom of tin in the reduced, unrefined tin ore or tin slag. 9.
The use of tin as a coating for other metals also has ancient historical roots, with tinned copper vessels for cooking tracing back to Roman times. Most important was the development of tinning iron sheet in order to form tinplate.
4. In the art of preparing a charge of material for use in a blast furnace in the formation of a tin iron alloy, the process which consists in mixing tin slag with limestone, sintering the mixture and mixing the sintered mixture with a carbonaceous fuel, and a flux. 5.
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