APPLICATION OF TITANIUM AND VANADIUM-ALLOYED CAST IRONS FOR THE PRODUCTION OF REPLACEMENT METALLURGICAL EQUIPMENT

The article summarizes the long-term experience of JSC ZSMK, research institutes and universities in the field of production of replaceable steel casting equipment. The paper presents the experience of manufacturing ladles made of blast-furnace cast iron, pallets, ladles, intermediate ladle covers made of induction cast iron alloyed with titanium and vanadium; discusses the use of resonant pulsating refining when purging cast iron with nitrogen, and also provides a generalization on the use of thermal melt treatment in refining cast iron used for the production of heat-resistant castings. The compositions of phosphorous and naturally alloyed cast iron of induction and blast furnace melting were developed. The use of resource-saving out-of-furnace processing technology and the transfer of casting of slag bowls from foundry cast iron to economically alloyed blast furnace cast iron made it possible to reduce the consumption of ferrosilicon from 25.6 kg to 12.9 kg, and ferrosilicon manganese from 7.4 kg to 4.27 kg per ton of cast iron, respectively. Consumption of ferrosilicon during the introduction of economically alloyed cast iron during the remelting of steel mills in induction furnaces was reduced from 34.28 kg per ton of cast iron to 18 kg per ton of cast iron, respectively. All technologies have been implemented in production. After the introduction of these technologies, the durability of products for the ferroalloy industry has increased by 10%. The consumption of mills at JSC ZSMK amounted to 11.8–12 kg per ton of steel, which corresponds to the best indicators in the industry. The durability of the caps of the intermediate caster buckets increased and reached 294 melting points. The durability of cast iron slag bowls has reached 700–1500 fillings; the durability of forging molds is 40–60 fillings, through molds – 90–100 fillings, pallets – 140 fillings. Thus, in the Siberian region, thanks to the joint creative work of specialists from JSC ZSMK, mass media, UPI, KemGU, KuzGTU, DonNIIchermet, MGVMI, a complex of technologies for producing replaceable steel casting equipment from blast furnace cast iron and induction cast iron was developed. These technologies have ensured maximum durability of the replaceable equipment at the level of the world’s best indicators with minimal cost of products. The work will be useful for industrial enterprises and research institutes in the development of new resource-saving technologies, as well as in the educational process for graduate students and students in relevant fields.