Agglomerated stone for use in shaft, corex or blast furnaces, process for producing agglomerate stones and use of iron ore fine and fine dust

摘要

In order to be able to economically use the hitherto unusable ore dusts resulting from the extraction and processing of iron ore, the invention proposes an agglomerated brick which contains (in% by weight) 6-15% of a cement binder, up to 20% % of a carbon carrier, up to 20% of residual and recycled materials, optionally up to 10% of a solidification and solidification accelerator, and residual iron in the form of particles having a grain size of less than 3 mm and after has an early strength of at least 5 N / mm.times.2 after three days and a cold compressive strength of at least 20 N / mm.times.2 after 28 days. Due to its particular strength St and shape retention even at high temperatures T agglomerated stones according to the invention are particularly suitable for use in manhole, Corex or blast furnaces. Furthermore, the invention provides a method for producing agglomerated stones according to the invention.