1. Hematite Reflected light, magnification 100x, one nicol

2. Slags after iron and steel production also frequently contain the solid solution of FeO-MnO-MgO having characteristic skeleton forms. Transmitted light, magnification 100x, one nicol

3. Solid solution of FeO-MnO-MgO SEM microphotography, scanning microscopy

4. Goethite FeOOH Transmitted light, magnification 100x, one nicol

5. Corundum SEM microphotography, scanning microscopy

6. Silicates Pyroxenes Pyroxenes Feldspars Melilites Transmitted light, magnification 200x, crossed nicols

7. Pseudomorphosis of pyroxene Transmitted light, magnification 500x, crossed nicols

8. In internal structures of silicates phases the presence of different elements substitutions, which are not present in nature, have been observed. Slags are also characterized by the occurrence of solutions of stable oxide and silicate phases, “pure phases” are rare.

9. Forsterite from the slag after Zn-Pb production (Mg 1,68-1,89 Ca 0,10-0,11 Al 0,09 Fe 2+ 0,02-0,09 Zn 0,04 ) [(Si 0,87-0,96 Al 0,04-0,13 ) O 4 ] Olivine - Forsterite Mg 2 [SiO 4 ]

10. gypsumcalcite In slags stored on dumps over long time the presence of secondary phases can be observed, represented by gypsum CaSO 4 ·2H 2 O and calcite CaCO 3 SEM microphotography, scanning microscopy

11. References: JONCZY I., NOWAK J., PORSZKE A., STRZAŁKOWSKA E.: Phase components of selected mineral waste materials in microscope images. Wydawnictwo Politechniki Śląskiej, Gliwice, Polska 2012. JONCZY I.: Mineral composition of the metallurgical slag after steel production. Mineralogical Magazine. Goldschmidt Abstracts 2011. Volume 75, number 3, 2011, page 1122 http://www.minersoc.org/files/Goldschmidt2012_Conference_Abstracts_J.pdf JONCZY I., STANEK J.: Phase composition of metallurgical slag studied by Mössbauer spectroscopy. Nukleonika. International Journal of Nuclear Research, Vol. 58, No. 1, 2013, pp. 127-131 http://www.nukleonika.pl/www/back/full/vol58_2013/v58n1p127f.pdf JONCZY I.: Metallurgical slags from converter furnace – specificity of their phase and chemical composition. MT Bilimsel – Journal of Underground Resources nr 5, 2014 Turkey, pp. 15-24 http://www.mtbilimsel.com/dosyalar/edergi-1392710524.pdf JONCZY I.: Variability of chemical composition of metallurgical slags after steel production. RMZ Materials and Geoenvironment; Materiali in Geookolje, vol. 60, no. 4. Slovenia 2013, pp. 263-270 http://www.rmz-mg.com/letniki/rmz60/RMZ60_4.pdf