Russian scientists find ways to convert metallurgical waste into construction materials
The scientists created a new technology and together with designers developed an unparalleled carbonisation chamber.
Metallurgical enterprises produce a huge amount of slags -- in Russia their volume reaches almost 500 million tonnes. Blast furnace and steelmaking wastes, ferroalloy slags and non-ferrous metal slags pollute large areas. To find ways to recycle them, CFU scientists cooperated with five Russian enterprises.
Slags produced at high temperatures contain substances that can react with carbon dioxide. The aim of the researchers was to develop optimal technological conditions to increase the reactivity of these minerals and make them suitable for carbonisation.
In total, several samples of various slags, including those produced during the processing of alumina raw materials, were studied during the research period. As a result, the scientists developed technologies to produce high-strength products, such as paving slabs and bricks, made entirely from waste, slag and carbon dioxide.
These products have high strength, durability, frost resistance and are resistant to acids and temperature fluctuations, significantly surpassing cement analogues. Raw materials for their production are cheap, and many enterprises will be ready to give some types of slags for free to get rid of their presence on their territory.
Edited by Vivian Yang, yangzhenqi@mysteel.com
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