TNC Kazchrome JSC (ERG) is the world's largest ferrochrome producer. During the production process, finely dispersed slags are formed. At the moment the slags of 0-5 mm are accumulated, represented mainly by oxide of silicon, calcium and magnesium. An investment-attractive technology is required to obtain marketable products (concrete, special cements, etc.) from slags, for the disposal of at least 200 000 tons of slags per year.