ORALS
SESSION:
IronWedPM3-R2
| Assis International Symposium (9th Intl. Symp. on Advanced Sustainable Iron & Steel Making) |
| Wed. 29 Nov. 2023 / Room: Dreams 2 | |
| Session Chairs: Tateo Usui; Session Monitor: TBA |
17:55: [IronWedPM313] OS
DEVELOPMENT OF RATIONAL RESOURCE-SAVING TECHNOLOGY FOR SMELTING FERROSILICOALUMINUM AND ORGANIZATION OF ITS PRODUCTION Abdurassul Zharmenov1 ; Jürgen Hein
2 ; Sailaubai Baisanov
3 ; Alibek Baisanov
3 ; Yerbolat Makhambetov
3 ;
1National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Almaty, Kazakhstan;
2ICMD International Corporation of Metal and Alloy Development Holding AG, Ганновер, Germany;
3Chemical-metallurgical Institute named after Zh. Abishev, Karaganda, Kazakhstan;
Paper Id: 385
[Abstract] The depletion of reserves of high-quality primary ore raw materials (quartzite, bauxite), the upward trend in the cost of coke, etc., presupposes an integrated approach to the use of mineral raw materials and coal mining products. Involving coal mining waste in the metallurgical process is one of the promising directions for organizing the production of complex silicon and silicon-aluminum alloys based on the electrothermal properties of high-ash carbonaceous rocks. The content of basic oxides in the ash of carbonaceous rocks, as well as the price, allows us to consider it as a cheap source of the corresponding elements in the composition of complex ferroalloys. The purpose of this work is to develop a rational resource-saving technology for the smelting of ferrosilicoaluminum using carbonaceous rocks. The technology for smelting ferrosilicoaluminum involves the use of high-ash coal waste with minor additions of quartzite without the use of coke. The process of reduction of silicon and aluminum is provided by carbonaceous rock. Waste carbonaceous rocks with an ash content of
50-65% are a unique material and are a natural mixture of oxides of silicon, aluminum and carbon. The mineral component of the rocks is 92-96% composed of silicon, aluminum and iron oxides, and the sum of silicon and aluminum oxides is at least 89-90%. The content of SiO2 and Al2O3 in the ash part is in the range of 55-60% and 30-35%, respectively. Coal mass in rocks, depending on ash content. is 20-34% with a content of up to 15-18% volatile compounds. This composition of carbonaceous rocks guarantees the production of a silicon-aluminum alloy with a silicon content of 50-65%, aluminum 10-30% and the rest iron [1-3]. The alloy is smelted in ore-thermal electric furnaces with a constant loading of charge materials and periodic release of smelting products - alloy and slag, and the amount of slag does not exceed 3-5% of the weight of the alloy.
References:
[1] Baisanov S.O., Tolymbekov M.Zh., Takenov T.D. etc. Mastering the technology of electrothermal smelting of ferrosilicon aluminum from coal waste at Ispat-Karmet OJSC. Steel, 2000. No. 7. P. 28-30.
[2] Baisanov S.O., Tolymbekov M.Zh., Karemkov A.A. Chekimbaev A.F. Terlikbaeva A.K. New types of carbonaceous rocks for smelting ferrosilicon aluminum // Steel. 2008. No. 8. – P. 59-61.
[3] Tsymbal V.P., Bogomekov V.I., Tolymbekov M.Zh. and others. Efficiency of using ferrosilicoaluminum for steel deoxidation // Steel, 2000, No. 6. – P. 24
