Iron mine tailings

Iron phosphate CBPCs may provide inexpensive means to recycle these waste streams. Iron mine tailings and red mud may be recycled in building components by fabricating ceramics from them at ambient temperature. Iron-rich swarfs may be recycled if a way is found to solidify these fines into pellets and feed them back into a blast furnace. Thus, iron phosphate CBPCs facilitate solidification of iron-rich waste streams and recycling. 

In spite of this limitation, the method is very useful, because it provides a means of forming a ceramic of one of the most common and inexpensive oxides. As discussed before, iron oxide is a component of lateritic soils and red mud, high-volume iron mine tailings, and machining swarfs. Thus, useful products of several mineral waste streams can be formed by the process described in this chapter. Development of ceramics using red mud and swarfs is discussed in Chapter 14. 

Iron mine tailings [3] 50-80 Structural materials products... 

Preliminary investigation into tailings-ground water interactions at the former Steep Rock iron mines, Ontario, Canada... 

Moldovan, B.J., Jiang, D.-T., Hendry, M.J. 2003. Mineralogical characterization of arsenic in uranium mine tailings precipitated from iron-rich hydrometallurgical solutions. Environmental Science and Technology, 37, 873-879. 

Mine tailings are a source of both metal and nonmetal contamination. A common material in coal mines is iron pyrite, FeS2. As a contaminant of coal, this compound and similar compounds contribute to the production of sulfur oxides in flue gases when coal is burned. As a material in mine tailings, it contributes both iron and sulfur to water pollution when the sulfide is oxidized in a series of reactions to sulfate and the Fe(II) oxidized to Fe(III) ... 

Most retinoid reductions have been reported in response to organic contaminants, but other pollutants may affect storage levels. Lake trout (Salvelinus namaycush) inhabiting an area contaminated with iron-ore mine tailings had hepatic retinol and retinyl palmitate levels reduced by approximately 95%80. These fish also exhibited oxidative damage, providing indirect evidence that the loss of retinoid stores may be related to increased oxidative stress. 

Payne, J., D. Malins, S. Gunselman, A. Rahimtula and P. Yeats. DNA oxidative damage and vitamin A reductions in fish from a large lake system in Labrador, Newfoundland, contaminated with iron-ore mine tailings. Mar. Environ. Res. 46 289-294, 1998. 

Mine tailing (>50% calcium Abandoned mine (iron ore) L Anolyte kept alkaline with 0.5MNaOH —/0.25/28 8.5/10.9 83/55 44 Baek et al. (2009)... 

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