Due to the metallurgical process technology, the slag from the flash furnace and the converters contains residual copper which is extracted through grinding and flotation. Two products are obtained at the slag flotation plant: flotation copper concentrate and flotation product called fayalite or Iron-Silicate Fines (ISF). Fayalite is powdery material with a high content of iron and silicon dioxide in the form of minerals, mainly fayalite, magnetite, quartz, etc. The specific density of the material is about 3.6 g/cm3 (bulk density 2.4 g/cm3). Iron-silicate fines are used in the cement industry as a ferrous additive. Products of concrete based on iron-silica fines have superior properties. Such products are pavements, lego-blocks for construction of warehouse separation walls, ultra-high performance concrete façade panels, shielding concrete, deterring concrete elements, adhesives, and ceramic products.
Detailed reference on material specification, material safety data sheet, logistics and shipping options, can be obtained in our PDF brochures here.
Iron oxide Fe2O3
Particles smaller than 70µm
approx. 2.4 t/m3
approx. 3.6 t/m3
Moisture after filter-press
46% (as Fe2O3>60 %)
Benefits for cement industry
» Ready-to-use source of iron;
» No need for additional crushing and grinding;
» Suitable for both dry and wet clinker production lines;
» Good mixing properties;
» Promotes lower calcination temperature;
» Eliminates the need for mineralizers.
» Enhances workability (pump casting) of low-grade concretes;
» Increases the abrasion resistance of mortar during concrete casting;
» No influences on alkali-silica reaction (ASR);
» Improves compressive strength;
» Improves shrinkage and waterproofing;
» Enhances pozzolanic properties and concrete durability.
» Road construction: as an additive in bed structure stabilization and substitute for stone flour in asphalt;
» Bricks: partial substitute for natural clay – reduces shrinkage and enhances color;
» Pavement tails: as an additive to improve sintering and abrasion resistance;
» Reinforcement: coastal, riverside and landslide concrete elements;
» Backfilling: additive for underground mines and road construction.