en.Wedoany.com Reported - Specialists from the National Center for Comprehensive Processing of Mineral Raw Materials in Kazakhstan have developed and tested advanced technology for processing complex polymetallic ores from the Shalkiya and Zhairem deposits.

According to the press service of the Ministry of Industry and Construction of Kazakhstan, traditional beneficiation methods are extremely inefficient, with up to 90-95% of processed material turning into waste and valuable components being lost. The new method aims to maximize the use of mineral raw materials and reduce the volume of tailings.

The key difference of the new method lies in the application of a carbothermic reduction process for lead-zinc ores with high silica content in ore-thermal furnaces. In traditional processing schemes, silica in the ore is sent to tailings ponds; the new technology enables the production of ferroalloys from it, while lead and zinc enter the gas phase for concentration and extraction.

Industrial tests were conducted in electric furnaces with a power range of 80-630 kVA, producing ferrosilicon grades ФС45, ФС65, and ФС75, ferrosilicoaluminum, aluminum-silicon-manganese alloys, as well as new calcium- and magnesium-containing ferroalloys.

Scientists focused on processing lead-zinc sublimates, obtaining high-purity zinc (grade ЦВ0), magnesium compounds, tribasic lead sulfate, and modern composite electrochemical coatings with high corrosion resistance through the new scheme.

The main outcome of the project is the creation of a nearly waste-free processing flow. In traditional technology, silicon is completely lost in beneficiation tailings, but the new method converts it into a commercial product. Over 99% of lead and zinc are converted into concentrated forms.

The developers have filed more than 10 patent applications for the new scheme for refractory ores and have prepared design specifications for ferroalloy production facilities and sublimation treatment units. Preliminary calculations show that the value of output per unit cost more than doubles compared to existing processing methods.

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