Analysis of Cylindrical Briquette Dimension on Total Iron Content and the Degree of Metallization in Direct Reduction Process of Iron Ore and Iron Sand Mixture

Abstract:

Indonesia has abundant resources or raw materials, especially the iron sand raw materials. But, the iron sand processing in Indonesia is still low. Even though, the steel demand in Indonesia is still high. So, the iron sand processing product as raw materials in steelmaking is the solution of it. In this research, the study was conducted by using the variation of briquette dimension of mixture of iron sand and iron ore in Direct Reduction process. The aim of this research is to study the effect of briquette dimension on Fe content and degree of metallization of the Direct Reduced Iron (DRI). First, the iron sand and iron ore were crushed and shieved until pass the 50 mesh standar size. Then, iron sand and iron ore were mixed and briquetted based on the variation of dimension. There are three variations of briquette dimension. Then, the briquettes was reduced at 1250°C for 12 hours. The reduced briquettes then were analyzed using XRD, XRF and degree metallization calculation. The result showed that the dimension of briquette affect the Fe content and the degree metallization of DRI. The dimension of briquette will affect the reductor gas flow in the crucible, so the rate and direction of reduction process of iron oxide will be affected too. The best briquette is Briquette B (7.9 cm for inside diameter, 15.1 cm for outer diameter and 19.5 cm for the height), with 75.02% for Fe total content and 66.52% for degree of metallization. This was due to The briquette B has the most evenly diffused dimension either vertically and horizontally.

• Periodical: Materials Science Forum (Volume 964)
• Pages: 19-25
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.964.19
• Online since: July 2019
• Authors: Fakhreza Abdul*, Sungging Pintowantoro, Alief Bram Hidayatullah
• Keywords: Cylidrical Briquette Dimesion, Direct Reduction, Iron Ore, Iron Sand

References

[1] South East Asia Steel International (SEAISI), Performance of the ASEAN iron and steel industry in 2017 and outlook, (2017).

[2] World Steel Association, Steel Statistical Year Book, (2017).

[3] I. M. o. R. o. Indonesia, Steel Industry Profile in Bahasa Indonesia,, (2014).

[4] X. She, H. Sun, X. Dong, Q. Xue, and J. Wang, Reduction mechanism of titanomagnetite concentrate by carbon monoxide, Journal of Mining and Metallurgy, Section B: Metallurgy 49 (2013) 263-270.

DOI: 10.2298/jmmb121001020s

[5] N.F. Farrokh, M. Askari, T. Fabritius, Behavior of three non-coking coals from Iranian's deposits in simulated thermal regime of tunnel kiln direct reduction of iron, Journal of Analytical and Applied Pyrolysis 123 (2017) 395-401.

DOI: 10.1016/j.jaap.2016.10.028

[6] S.C. Khattoi, G.G., Roy, Sponge iron production from ore-coal composite pellets in tunnel kiln, India Iron. Prod 13 (2012).

DOI: 10.1007/s12666-014-0498-0

[7] A. Sarangi, B. Sarangi, Sponge iron production in rotary kiln, PHI Learning Private Limited, New Delhi, (2011).

[8] R. Bechara, H. Hamadeh, O. Mirgaux, F. Patisson, Optimization of the Iron Ore Direct Reduction Process through Multiscale Process Modeling, Materials 11 (2018) 1094.

DOI: 10.3390/ma11071094

[9] Brindley, G. W., & Hayami, R. Kinetics and mechanism of formation of forsterite (Mg2SiO4) by solid state reaction of MgO and SiO2, Philosophical Magazine, 12 (1965) 505-514.

DOI: 10.1080/14786436508218896