The mining and manufacturing of basic precious non-ferrous metals industry remains very important to the South African economy, having had a sterling performance during the pandemic. It is still a big ticket item in the country, with many challenges in a world where ethics (responsible mining) and environment (carbon neutral manufacturing) have taken centre stage.
It seems the climate change regulation and the fourth industrial revolution will increase demand for some of the basic precious and non-ferrous metals, not only in South Africa but globally. Cobalt as the essential ingredient in batteries, has become the mainstay of high demand for non-ferrous metals, as batteries will power future transportation such as electric cars.
Electric arc furnaces (EAFs) generally convert 1 to 2 of the charge into dust or fume (Chaubal 1982). Zinc contents of the dust have potentially high commercial value. Many methods have been proposed for flue-dust recycling, including zinc recovery. A good survey of recycling strategies is given by Morris (1985). Most recovery options require the zinc content of the dust to be at least 15 , and preferably 20 for the operation to be economical. Increasing zinc content can be accomplished by returning the dust to the furnace from which it is generated. If the dust is injected into the furnace after the charge of scrap metal is melted, temperatures are high enough for most of the heavy metals to fume off, resulting in high zinc content in the dust collected by the scrubbers and or electrostatic precipitation systems and baghouses.
The metal casting industry, also known as the foundry industry, is one of the largest recyclers in the world. For centuries, this industry has been converting a huge volume (e.g., 15 to 20 million tons in the U.S.) of scrap metal that would otherwise be disposed in landfills, into manufactured useful products. This scrap metal forms the raw material charged into furnaces of the foundry facility and converted into usable castings. The casting categories include many general ferrous and nonferrous metals and their alloys, including iron, steel, aluminum, copper, magnesium, and zinc. Major end-use markets cross all sectors of the global economy, examples being the automotive industry, transportation equipment, construction, mining and oil field machinery, and industrial machinery. As the assembled molds are being placed on the pour-off lines, the scrap metal is melted in the furnace.
Forging services for power, aerospace, automotive, mining, heavy equipment, manufacturing, oil and gas industries. Capable of forging parts over 150 tons. Materials worked with include ferrous and non-ferrous metals such as carbon steel, steel, stainless steels, aluminum, copper, titanium and superalloys. Open and closed die forging services are available. Prototype and low to high production volume are provided. Secondary services include heat and surface treatment. 1e1e36bf2d