Slagból

Slagból is a term used to describe materials produced from slag, the by-product of metal production, especially from smelting and refining processes. In a broad sense, slagból encompasses a range of slag-derived construction and industrial materials created by processing metallurgical slag from sources such as blast furnaces and steelmaking.

Processing methods typically include sorting, crushing, grinding, washing, and magnetic separation to remove metals and other impurities. The resulting materials can be used as aggregates in concrete and asphalt, as cementitious components such as ground granulated blast-furnace slag (GGBS) or slag cement, and as bricks, blocks, or decorative paving. Slag-derived products also include mineral fibers like slag wool and lightweight aggregates used in concrete, insulation, or geotechnical applications.

Common slag varieties include blast furnace slag, basic oxygen furnace slag, and electric arc furnace slag. The specific mineral and chemical composition of each slag type determines suitable applications and necessary processing steps. A key advantage of slagból products is the diversion of by-products from landfills and the reduced need for natural aggregates, contributing to resource efficiency. Environmental and economic factors, such as transportation energy and processing costs, also influence their viability.

Environmental considerations focus on potential leaching of heavy metals or salts, which is mitigated through stabilization, encapsulation, and adherence to standards. Standards and certifications govern the performance and safety of slagból materials in concrete, road bases, and building components.

See also: slag, blast furnace slag, ground granulated blast-furnace slag, slag cement, slag wool, recycled aggregate.