Predicting iron ore sinter strength through partial least square regression (PLSR) analysis of X-ray diffraction patterns (original) (raw)

Analysis of Iron Ore Sinter Technological Test Results

Journal of Characterization, 2022

The sintering process is to bring the powdered iron ores to the desired particle size, strength and gas permeability for the blast furnace. During sintering, important events such as bonding between particles, size change and coarsening of the microstructure take place. Reduction Under Load (RUL) test is performed to determine the metallurgical properties of the sinter sample. Statistical process control techniques are used for iron and steel plants in which data are measured for certain periods to increase physical, chemical and reducibility properties of sinter production. Thus, when some important advantages are provided in terms of control and applicability. In this study, static and dynamic test low temperature reduction disintegration and reduction under load of the samples taken out regularly from sinter samples were investigated to determine capability of the process. For each parameter, X-R control charts using moving range method were drawn. Thereby, deviations of lower and upper limit values were determined It was concluded that the amount and grade of raw ore in the sinter blend should be fixed by using appropriate amounts.

A Short Review of the Effect of Iron Ore Selection on Mineral Phases of Iron Ore Sinter

Minerals, 2021

The sintering process is a thermal agglomeration process, and it is accompanied by chemical reactions. In this process, a mixture of iron ore fines, flux, and coal particles is heated to about 1300 °C–1480 °C in a sinter bed. The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering. The silico-ferrite of calcium and aluminum (SFCA) is the main bonding phase found in modern iron ore sinters. Since the physicochemical and crystallographic properties of the SFCA are affected by the chemical composition and mineral phases of iron ores, a crystallographic understanding of iron ores and sintered ore is important to enhance the quality of iron ore sinter. Scrap and by-products from steel mills are expected to be used in the iron ore sintering process as recyclable resources, and in such a case, the crystallographic properties of iron ore sinter will be affected using these materials. The objective of this paper is to present a short review on resea...

Comparison of the Mineralogy of Iron Ore Sinters Using a Range of Techniques

Minerals

Many different approaches have been used in the past to characterise iron ore sinter mineralogy to predict sinter quality and elucidate the impacts of iron ore characteristics and process variables on the mechanisms of sintering. This paper compares the mineralogy of three sinter samples with binary basicities (mass ratio of CaO/SiO2) between 1.7 and 2.0. The measurement techniques used were optical image analysis and point counting (PC), quantitative X-ray diffraction (QXRD) and two different scanning electron microscopy systems, namely, Quantitative Evaluation of Materials by Scanning Electron Microscopy (QEMSCAN) and TESCAN Integrated Mineral Analyser (TIMA). Each technique has its advantages and disadvantages depending on the objectives of the measurement, with the quantification of crystalline phases, textural relationships between minerals and chemical compositions of the phases covered by the combined results. Some key differences were found between QXRD and the microscopy te...