VALORIFICAREA ŢUNDERELOR ÎN MATERIALE CU VALOARE ADĂUGATĂ

• Published in: Revista Romana de Materiale Vol. 47; no. 2; p. 276
• Main Authors: Moanţă, Adriana, Mohanu, Ileana, Paceagiu, Jenica, Năstac, Daniela Cristina, Petre, Ionela, Fechet, Roxana Magdalena
• Format: Journal Article
• Language: English
• Published: Bucharest Foundation for Materials Science and Engineering - "Serban Solacolu" 01.04.2017
• Subjects: By products; Cement plants; Cements; Chemistry; Civil engineering; Clinching; Clinker; Concrete mixing; Continuous casting; Engineering research; Heavy metals; Laboratories; Manufacturing; Methods; Microscopy; Mineralogy; Nanostructured materials; Optical microscopy; Particle size; Production planning; Pyrite; Qualitative analysis; R&D; Railway networks; Raw materials; Research & development; Scale (corrosion); Steel industry; Studies; Sulfur; Temperature; X-ray diffraction; X-rays
• ISSN: 1583-3186

The paper presents the results of laboratory research concerning the possibility of replacement the pyrite cinder from the clinker's raw mix, with other waste with high Fe2O3 content, like mill scale. An assessment of technological and qualitative aspects that involved this issue was taken into account. The influence of mill scale both on the raw mix burnability and clinker characteristics was investigated. The composition, mineralogical and structural - textural features of the resulted clinkers were characterised by wet chemistry, X-rays diffraction, and optical microscopy analysis. Also, theoretical consumption of heat at clinker formation was assessed. Cements CEM I were obtained from clinkers synthetised in the laboratory. These cements were characterized from physicalmechanical point of view, according to SR EN 197-1. The qualitative appreciations and the technological behavior were achieved in comparison with a raw mix, obtained from current raw materials, considered as reference. Presence of mill scale in raw mix did not modify qualitative characteristics of the clinker and cement, respectively. This finding sustains the possibility of replacement of the pyrite cinder with mill scale in clinker raw mix.