Assessing the quality of metallurgical coke by Raman spectroscopy

作者：Rantitsch Gerd^*; Bhattacharyya Anrin; Schenk Johannes; Luensdorf Nils Keno

来源：International Journal of Coal Geology, 2014, 130: 1-7.

DOI：10.1016/j.coal.2014.05.005

• Carbonaceous materials
• Coke
• Experimental heating
• Coke reactivity
• Raman spectroscopy

Metallurgical coke should be resistant to mechanical, thermal, and chemical influences. This resistance is related to the structural order of the organic constituents. Raman microspectroscopy of carbonaceous matter (RSCM) is demonstrated as a promising tool to investigate this property. Variations of the microstructure among samples with different quality parameters are detected by analyzing the Raman spectra collected on their individual coke lumps. Three basic types of Raman spectra are discriminated. Their predominance in a bulk sample predicts roughly the coke quality, estimated by an ISO standardized test. To investigate the structural behavior of coke in a blast furnace, several samples have been treated under typical gas atmospheres of the blast furnace process (carbon dioxide, nitrogen) at temperatures between 850 degrees C and 1100 degrees C for 120 min. RSCM data measured on the treated lumps evidence a progressive transformation of poorly ordered organic microstructure towards a higher structural order.

• 出版日期2014-8-15