4831621691

106

Figurę 4.11 SEM backscattered electron image and elemenial composition of

released condensed gas during thennal treatment.

4.4 Conclusion

Calamine processmg wastes were eharaeterized m order to their potential reuse as ceramic materiał. This type of waste is mainly composed of CaO. Fe:03 and Iow amounts of SiCb. The CPMT presents higher amounts of fluxing agent oxides (NaiO. K:0. PbO) which enhance the smtering and densifłcation of the derived fired products. The amounts of CaO and Na^O mcrease sligłitly afier thennal treatment. The mineralogical XRD analysis shows that gypsum (CaS04.2H20). ąuartz (SiCb) and calcite (CaC03) are the main crystalhne pliases present in the calamine process minę tailings. When fired to high temperatures, various trans format ions take place. Gypsum is transformed mto anliydrite (CaSOih amorphous iron hydroxides are transformed mto magnetite (Fe304) andhematite (Fe:03 K and carbonates minerals are decomposed. These transformations affect significantly the physical and mechanical properties of fired samples due to the amount of gas released which leads to high amounts of pores. At 1050^:‘C. new phases such as augite (Ca(Fe.Mg)Si20ć) andgehlenite (CmAliShOj) are formed.

Wyszukiwarka

Podobne podstrony:
140 Figurę 5.11 SEM micrographs ofMo (a) M30 (b) brick samples fired at 1050 :*C. Fourier transfoim
00081 /16b9e2d8f8d2efe7b66f1d797df498 80 Hembree & Zimmer Figurę 14. Covariance Comparisons (ac
MSc in Electronics, Photonics and MicrosystemsWrocław University of Technologyaddress: Wybrzeże
schemat frontow2 FIGURĘ 15.4 Stages in the formation and eventual dissipation of an occluded (ront.
sa 11 Exercise 9.—The Deltoid Muscle* and the FTonl of the Shoulders Stand erect with botli arms to
1H8 Figurę 3-11. Left -ESD image of toner particles Right -GSED image of the same sample. Notę
54481 skanuj0025 (158) 276 CUAITKR II: Ki-.SIMRATION AND ! Il’ll> MKTAT.Oi ISM FIGURĘ 11.7. A pro
65062 skanuj0025 (90) 276 CIIAITFR II: RF.SRIRATION AND 1.11 ID MKTAROI.ISM FIGURĘ 11.7. A proton el
f2 11 FIGURĘ 2.11 D w doping software using the Java API.
fig11 Figurę 11 Gold Hnafatafl piece from Tuse in Denmark
00046 ?c2509350e21c3447d8db6068221f3a 45 A Rule-Based Approach to Multiple Statistical Test Analysi
00073 ?669057b99e1a32461d685010d9b1f0 72Hembree & Zimmer Figurę 11. Adaptiye Filter Weights (tr
00381 ?c79f45a4235fae8108ab837f609112 385 Regret Indices and Capability Quantification Figurę 11. C
ZSTf-nęsr^ Hpr-K. S-38E receiver DEPT. 20. CHICAGO 11. III.Sonotone.l Electronic

więcej podobnych podstron