Manur Nuclear Power Produces Domestically Heaviest Slender Withdrawal-Type ESR Ingot

On August 30, 2026, the 60t withdrawal station of the 150-ton-class atmosphere-protected electroslag remelting (ESR) furnace at Yantai Taihai Manur Nuclear Power Equipment Co., Ltd. successfully produced a slender ESR ingot with a diameter of approximately 1270 mm and a weight of 61.2 tons, setting a new record for domestically manufactured special metallurgy equipment and consolidating the equipment foundation for the supply of high-end nuclear power forgings.

The 61.2-ton slender withdrawal-type ESR ingot produced this time features a regular appearance and excellent surface quality. During the smelting process, equipment and operations including atmosphere protection, melt rate control, precise molten metal level control, fully automatic electrode exchange, and the complete withdrawal process remained stable and controllable. This ingot is currently the heaviest slender withdrawal-type ESR ingot produced in China, representing another critical leap in domestically manufactured large-tonnage withdrawal-type ESR equipment and consolidating the equipment foundation for the supply of high-end nuclear power forgings.

Compared with conventional smelting stations, the 60t withdrawal station can produce customized slender ESR ingots as required, with ingot dimensions and weights precisely matching the working condition requirements of various nuclear power forging ingots, significantly improving the comprehensive utilization rate of ingots. This helps drive special metallurgy toward refinement, large-scale production, and higher efficiency.

As a core supporting manufacturing unit for high-end nuclear power equipment, the 60t withdrawal station of the 150-ton-class atmosphere-protected ESR furnace has achieved successive production breakthroughs, filling the domestic manufacturing gap for ultra-large-tonnage slender withdrawal-type ESR ingots, removing supply constraints for certain high-end nuclear power forging ingots, providing solid material assurance for the localization of key nuclear power equipment such as the primary loop main pipes of million-kilowatt-class nuclear power plants, and contributing to the continuous enhancement of the independent controllability of China's nuclear power industry chain.