Environmental and technical assessment of ferrochrome slag as concrete aggregate material

Analysis of chromium and sulphate origins in construction recycled materials based on leaching test results

“…This finding differs from results shown in Table 5, in which most of the total Cr content was Cr (III). The differences observed could be caused by the lower mobility and solubility of Cr (III) and the high leachability of Cr (VI) in neutral or alkaline solutions, which markedly increases its toxicity under all environmental conditions (Panda et al, 2013). However, Cr (III) appeared on the leaching of two RA (M4 and M10) where the pH was neutral or slightly alkaline because in some cases the sulphides and organic matter present in the material reduce the oxidation state of Cr (James et al, 1995).…”

In-situ chromium and vanadium recovery of landfilled ferrochromium and stainless steel slags

“…When FeCr slags are used in road construction without extra treatment, the chromium has been found to leach to the environment and be taken up by surrounding life [9]. Apart from relatively high amounts of Cr, SS slag contains also significant concentrations of valuable Ni, Mo, and V. Removal of these metals, together with the Cr from the FeCr and SS slag matrix will improve the environmental quality of the slag material for further use as cement [10] or construction material [11].…”

Influence of burning temperature and cooling methods on strength of high carbon ferrochrome slag lightweight aggregate

“…It could be reutilizated after water quenching and recycling Cr 2 O 3 , or be used as paving material and concrete aggregate directly [2]. Panda et al crushed the slag to different particle sizes and used them as the coarse aggregates of the concrete, which showed a higher compressive strength than the common concrete [3].…”