The Kim Chaek Iron and Steel Complex introduced a new method capable of improving the stability in operation of waste heat boiler system of oxygen heat blast furnace to put the production on a normal basis.

The complex confirmed the possibility of introducing an innovative plan which can raise the capacity of oxygen heat blast furnace by 1.2 times and pushes ahead with the technical preparations to complete it.

The Posan Iron Works settled the problems arising in the grinding process of pulverized coal and established a kindling method by a firing machine to reduce the blowing-in time of the revolving furnace.

The steel shop of the Hwanghae Iron and Steel Complex raised the actual output ratio of molten iron, saving electricity used for heating tundish. The gas producing shop of the complex established a manufacturing method of adhesive binder by steam or hot-water heating to reduce daily oval briquette consumption amount by more half than before.

The Musan Mining Complex manufactures important parts of a rotary drill by itself.

The same is true of the Hungnam Electrode Factory and the Jaeryong Mine.