Tin refining is the process of treating tin by physical and chemical methods to remove impurities and improve its purity. In the smelting process, most of them use reverberatory furnaces, and a few use electric furnaces. The reverberatory furnace used for melting has an inclined hearth and occupies very little space. After melting in the low temperature zone, it is pulled to a higher temperature range.
Tin is the first metal to be discovered and used. During the Shang Dynasty, our ancestors were able to make bronze utensils with tin, copper, lead, etc. The tin base has soft ductility, stable chemical properties, corrosion resistance, easy melting, low friction coefficient, and non-toxic tin salts. Therefore, it has important applications in modern national defense, modern industry, cutting-edge technology, and people's daily life.
From simple physical methods in ancient times to modern physical and chemical methods. With the continuous improvement of environmental protection requirements, tin purification technology has been continuously improved, with the advantages of environmental protection and low cost. At the same time, various new tin purification technologies have been continuously introduced, providing new opportunities for the development of the tin refining industry. Today, we will discuss about wet smelting:
Tin ore wet extraction technology is a method of extracting tin from ore by chemical and physical action. The main principle of this method is to use the tin in the tin ore to react with hydroxide to form stannate, and then reduce the stannate to metallic tin through a reduction reaction. The wet extraction process of tin ore is simple, with low equipment investment and low energy consumption, and has been widely used in the extraction of tin ore.
The use of chemical methods to recover low-concentration waste tin is an important recycling method. Among them, acid leaching and solvent extraction are the most commonly used technologies. Solvent extraction is to use a specific organic solvent to extract tin ions from waste tin, and then obtain pure tin through subsequent treatment. This method is suitable for situations with low tin content and high recovery rate, but it is necessary to select appropriate solvents and extraction conditions.
The reverberatory furnace used for wet refining of tin ore can also be used for the smelting of other ores.
