economy

The Munphyong Smeltery, a model in making the nonferrous metal industry Juche-based, completed a production cycle of reusing waste materials from production processes.

The production cycle was highly appreciated at the recent 39th National Festival of Science and Technology as it makes it possible to protect the ecological environment and firmly guarantee the sustainable development of Juche-oriented nonferrous metal production.

The smeltery pushed ahead with a technological drive for recycling waste materials in parallel with the establishment of a Juche-oriented nonferrous metal production process.

The technicians and workers successfully established a process for producing a sublimate using waste from the production of lead and zinc and returned it to the electrolytic zinc production process to be used as a raw material. In addition, they set up a process of extracting iron oxide from waste slags from the sublimate production process.

What is noteworthy is that they applied a special technology into the magnetic separation process for iron oxide production so as to freely raise the grade of iron. Iron oxide from the waste recycling process is used as a tonic in improving the stability and actual extraction rate of the Juche-oriented lead smelting process.

The smeltery is now making technical preparations for turning out various kinds of blocks and roofing tiles by using a silicon compound, which remains after extracting iron oxide in the sublimate production process, as a construction material. It is said that a tailing mill will be unnecessary if even the silicon compound, the remnant of several rounds of waste recycling, is used as a building material.

It is their ideal and target to make their workplace a “pollution-free workplace” and “green smeltery” by steadily developing and introducing recycling technologies.