Full-Scale Experimental Test Production of High-Basicity Sinter in the Enakievo Metallurgical Plant Sinter Shop
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FULL-SCALE EXPERIMENTAL TEST PRODUCTION OF HIGH-BASICITY SINTER IN THE ENAKIEVO METALLURGICAL PLANT SINTER SHOP G. S. Bobylev,1,2 A. G. Kovalenko,1,3 V. P. Padalka,1,4 V. V. Kochura,5 A. V. Zubenko,1,6 N. N. Korobkin,1,7 A. M. Kuznetsov,1,8 and A. S. Khaibulaev1,9
UDC 669.162
We describe the results for full-scale experimental test production of high-basicity sinter (basicity 2.0– 5.0) at the Enakievo Metallurgical Plant Sinter Shop. As sinter basicity increased from 2.0 to 5.0, the iron content of the sinter decreased from 53.05% to 32.24%, and the ferrous oxide concentration decreased from 17.55% to 9.29%. However, the strength specifications of the sinter were improved: The concentration of 0–5-mm fines decreased from 19.32% to 15.89%, and the yield of + 5 mm size class in a drum test increased from 65.9% to 72.3% through optimization of the sintering process parameters. The use of high basicity sinter in blast-furnace smelting reduced the specific consumption of lime in the blast-furnace charge from 233.9 kg/metric ton of cast iron (at sinter basicity 2.0) to 103.5 kg/metric ton (at basicity 4.5) and, correspondingly, the specific feed rate for coke during castiron production decreased from 538.1 kg/metric ton to 476.6 kg/metric ton. Key words: sinter, limestone, lime, basicity, fuel, charge, strength, blast furnace.
In the current operating environment for the ferrous metal industry, producers that are able to produce more efficiently with higher-productivity machinery, lower feed rates of production inputs per unit of end product, and low production cost have an advantage. High production efficiency can be achieved through the introduction of new, advanced technologies. However, efforts to reach high production efficiency must avoid adverse environmental impacts. Coke is the most expensive item used to charge a blast furnace. Reducing the feed rate of coke per unit of cast iron produced reduces the cost of production. Measures intended to reduce coke consumption generally also increase blast-furnace productivity. Coke production causes hazardous materials to be released into the atmosphere, and this means that reducing the consumption of coke per unit of cast iron produced will improve regional environmental conditions. Thus, any measures to reduce the feed rate of coke per unit of cast iron produced will lead to improved production efficiency, and make it worthwhile to implement such measures. The Enakievo Metallurgical Plant (EMZ) Sinter Shop was placed into service in 1938, with the most recent renovation/upgrade being performed in the mid 1950s. The Sinter Shop currently has four K-2-60-U sintering 1 2 3 4 5 6 7 8 9
Enakievo Metallurgical Plant, Enakievo, Donetsk Oblast, Ukraine. E-mail: [email protected].
E-mail: [email protected]. E-mail: [email protected].
Donetsk National Technical University, Donetsk; e-mail: [email protected]. E-mail: [email protected]. E-mail: [email protected].
E-mail: [email protected]. E-mail: Abdula.K
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