Introduction Zn-containing electric arc furnace dust (EAFD), a solid waste produced during steelmaking process, contains many valuable metals, such as Fe, Zn, Mn, Ca, etc. (Kukurugya et al., 2015; Wang et al., 2016b). And the dust is classified as hazardous wastes according to the US Environmental Protection Agency because of the presence of Cr, Pb, etc. (Ann M. Hagni et al., 1991; Wang et al.,...

A Co-based alloy coating was deposited on H13 steel substrate via pulsed Nd:YAG laser and the corrosion resistance to mechanism of in molten aluminum were explored. The results showed that mainly composed ?-Co dendrite M23C6 precipitation. average hardness cladding layer 732.6 HV0.5, which 3.55 times greater than substrate. During test, surface immersed for 4, 8, 16 24 h at 700 °C. rate decreas...

Surface microstructures were investigated in pure iron and Fe-1mass%M (M = Mn, Cr, Al, Si) alloys gaseous-nitrided at 1123 K quenching to reveal the alloying effects on surface hardening by nitrogen (N) martensite. Thicker hardened layers with higher hardness than obtained Mn-added whereas additions of Si Al lead increase reduction layer thickness. On other hand, adding Cr decreases both thickn...

This study shows the effects of nuclear waste glass production on Monofrax K-3 refractory corrosion. A continuously fed research-scale melter containing an Fe- and Ni-rich simulated feed with borosilicate glass-forming chemicals was cyclically melted at 1150°C idled 1050°C for a total 11 weeks. Chemical maps using scanning electron microscopy show interactions between quenched melt refractory. ...

THE PRESENCE of small amounts of iron in chromium metal results in a lowering of the Neel temperature along with other anomalous diagram[l, changes in the phase r 1 , 2]. Suscepti­[I] N eel bility measurements 1 below the tem­perature show that the iron sites have associ­ated with them localized magnetic moments of about 1·4f.LIJ I· per iron atom and that the iron moments remain paramagnetic do...

the contamination of riverbed sediments by heavy metals has assumedserious problems due to their toxicity and accumulative behavior. the present studyinvestigated the concentrations of heavy metals from the bottom sediments of shitalakhyariver to understand the level of contamination and their distribution. the averageconcentrations of heavy metals al, k, ca, mg, fe, as, cu, co, cr, and zn are ...

The present investigation deals with the accumulation of heavy metals in fields contaminated with fly ash from a thermal power plant and subsequent uptake in different parts of naturally grown plants. Results revealed that in the contaminated site, the mean level of all the metals (Cd, Zn, Cr, Pb, Cu, Ni, Mn and Fe) in soil and different parts (root and shoots) of plant species were found to be...