The Munphyong Smeltery built a foundation for increased production of minerals by establishing a system of raw materials storage and transport with its own technical forces.

The Taedonggang Battery Factory improved the technical processes and management methods for removing harmful substances from the process of producing recycled lead, and the Manpho Smeltery took technical measures to raise the extraction rate, thus saving raw materials and manpower.

Workers and technicians of the December 5 Youth Mine increased the production of crystal mirabilite by conducting a test production for establishing new production processes in liaison with scientific research unit.

Unpha, Phungnyon, Hyesan Youth and Yongyu mines, too, have invented and introduced new technical innovation proposals to make a breakthrough for increased production of minerals.