Metal Recover by Recycling of Waste in a Solar Furnace
Odilhuja Parpiev, Mukhammad-Sultan Payzullakhanov*, Bum Sung Kim, Erkin Nodirmatov
The technogenic wastes of Metallurgical Plant, containing non-ferrous metals - gold, silver, as well as iron and copper, were investigated. The concentrated solar radiation flux at the Big Solar Furnace with a thermal power of 1 MW was used to heat industrial waste with the addition of coke (5 wt.%) And calcium oxide (10 wt.%) In a graphite crucible. Under the influence of concentrated solar radiation with a flux density of 70-100 W / cm2, the material melted and the melt drained into water. In the liquid state in the presence of carbon, the process of metal reduction from oxide states proceeded. The crystallization process upon cooling of the melt in water had the character of segregation, i.e. Separate crystallization of metals and ceramics. As a result of this, individual granules of metal and ceramics of various sizes and shapes accumulated in water. Quantitative analysis showed that the processing of industrial waste in a stream of concentrated solar radiation of high density allows you to extract metals (25 wt.%) From them that can be used in metallurgy. And the remaining ceramic part (75 wt.%) Is calcium silicate, which can be used to create lining plates.