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Extraction of Tin Metal (Results (Carbon Stoichiometry (Increase in molar…
Extraction of Tin Metal
Introduction
Tin extracted from ore by reduction smelting at high temperature with addition of flux depending on the type of ore
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using alkaline molten salts as media,they provide high rate of reduction reaction and can be
carried out at low temperature.
objective
To study the extraction process of Tin metal
from Egyptian cassiterite concentrate using the alkaline molten salts as fluxing agents
Parameters: Carbon stoichiometry, ratio of Sodium carbonate, Sodium nitrate added, temperature and time of reduction.
Procedure
Smelting
The concentrate with addtion of flux is weighed, mixed and transfered to crucible
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Results
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Sodium Carbonate Ratio
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Low content of sodium carbonate may cause an increase in slag viscosity and impedes the separation between the metal and slag, causing reduced in tin metal yield
Sodium Nitrate Ratio
presence of excess sodium nitrate may provide oxidation of the produced tin to its oxides and stannate phases again which lowers tin metal yield
Smelting Temperature
at high temperature almost all tin oxides completely reduced to tin metal represented in the high yield of tin metal.