A mathematical model is constructed to calculate the unit productivity of a sintering machine that is used at Ural Steel to sinter ores and concentrates from the Kursk Magnetic Anomaly. The effect of the parameters of the sintering operation on the machine's unit productivity is analyzed. Keywords: mathematical model, sintering-machine charge, unit productivity of a sintering machine.The ongoing growth in blast-furnace smelting is making it necessary to increase the productivity of sintering machines while maintaining the present quality of the sinter that is produced. The main indices of the sintering operation and potential ameliorative measures can be studied qualitatively and sintering costs can be reduced by studying the sintering process on the basis of mathematical modeling. The interrelationships that are discovered by this approach can then be used to optimize and control the sintering operation.In connection with this, the goal set for the investigation being discussed in this article was to develop a mathematical model for calculating the unit productivity of a sintering machine used to sinter ores and concentrates from the Kursk Magnetic Anomaly (KMA). To do this, we used information in monthly technical reports issued on the performance of the sinter shop at Ural Steel during the period from January 2005 to September 2013. The reports contain the monthly average for the technological and quality indices of the sintering operation carried out on four sintering machines (each with a sintering area of 84 m 2 ). Tables 1-3 show some of these indices for the sinter shop at Ural Steel in the given period after the statistical data was subjected to a preliminary analysis.This statistical data and results obtained from analyzing the information in the studies [1-6] were used to establish a base set of factors that affect the unit productivity of a sintering machine:the total aerodynamic resistance of the bed of charge materials -the pressure gradient over the height of the bed (the difference between the vacuum above the bed on the sintering-machine strand and the vacuum under the bed (in the collection main) (Fig. 1); the height of the bed determines its average gasdynamic resistance (Fig. 2); the bulk density of the charge, this factor being regarded as a characteristic of the charge's composition (Fig. 3); the granulometric composition of the charge determines the capacity of the bed and depends on the initial composition of the charge, the lengths of time taken for mixing and balling of the charge materials, the designs and operating regimes of the mixers and balling drums (which are expressed through the weighted-mean coarseness of the bed, its coarseness based on an equivalent surface, and its porosity); sintering time is the quotient obtained by dividing the height of the bed by the vertical sintering speed (Fig. 4);4 sintering temperature determines the formation of the re-moistening zone (Fig. 5); the moisture content of the charge affects the quality of its mixing and balling; the content of fi nel...
The purpose of the study was to conformity of the quality of coke used in the blast-furnace shop of JSC “Ural Steel” meets the requirements recommended in the scientific literature, and to study its impact on the consumption of coke and the production of pig iron at the enterprise. For the study, the blast furnace № 1 with a useful volume of 1007 m3 and the blast furnace No. 4 with a useful volume of 2002 m3 were selected. The results of the analysis of data on the quality of coke over a three-year period: ash content, volatile matter and sulphur in the coke, the moisture content in the coke, the coke uniformity coefficient, indicators of the cold strength of coke (M25 and M10), indicators of coke hot strength (CSR) and reactivity of coke after high-temperature interaction with CO2 (CRI). Studies have revealed significant instability of the moisture content in the coke, which affects the change in its consumption, and heterogeneity of the granulometric composition of the coke, increasing the stability and uniformity of which would favorably affect the indicators of the blast furnace process. It was found that the values of the indicators of M10 coke attrition, hot strength of coke (CSR) and reactivity of coke (CRI) do not meet the recommendations of domestic and foreign scientists. Measures are proposed to improve the quality of coke, the implementation of which will increase the productivity of blast furnaces and reduce the consumption of coke per ton of pig iron.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.