New Technical Solutions for Increasing the Active Cross-Section Area of Fire Grates of Sintering Machine

Authors

DOI:

https://doi.org/10.15407/scine20.01.087

Keywords:

grate, contact faces, charge, sintering machine, live section, gas permeability, resistance, performance

Abstract

Introduction. One of the defi ning elements of the design of sintering machines is a moving conveyor belt consisting of sintering trucks, with a set of grates, on which the charge for the production of agglomerate is continuously loaded.
Problem Statement. The presence of the remains of raw charge and agglomerate particles in the space between the grates and the elements of the sintering truck leads to an increase in the mass of the conveyor belt, negative changes in the thermal load of the truck bodies and an increase in the temperature of metal structures and excessive energy consumption for the process.
Purpose. Studying the peculiarities of the use of fi re grates of the sintering machine with an increased active cross-sectional area and reduced gas dynamic resistance due to improving the grate design.
Material and Methods. The features of changes in the gas-dynamic resistance of fi re grates made with the use of improved grates, the heat load on the sintering truck, and the conditions for cleaning the grate fi eld from the remains of the raw charge and agglomerate particles have been established by experimental and industrial tests on sintering machines of the AKM-75 type and by modeling with the use of SOLIDWORKS.
Results. It has been established that the grates with a variable cross-section and the angle of the contact faces of the hinges of the lock to the under-rail beam, which exceeds 90 degrees, ensure a reduction in the heat load on the sintering truck due to the minimization of the area of their contact with the beam. According to the results of mathematical modeling, the nature of the infl uence of the active cross section on the volume of absorbed gases has been determined. As a result of the increase in the free access of gas fl ows for cooling the grates and under-grate beams, the degree of self-cleaning of their contact surfaces increases.
Conclusions. The proposed design allows increasing the area of active cross-section of fi re grates, providing a reduction in the gas-dynamic resistance to the passage of gas fl ows and the thermal load of the system, raising the effi ciency of removing charge residues from the inter-contact space, and excluding the mechanism of forced grate shaking from the standard scheme of sintering of agglomerate.

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Author Biographies

Е. SIGAREV, Dnipro State Technical University

Head of the Department of Metallurgy of Ferrous Metals and Metal Pressure Processing, Doctor of Technical Sciences, Professor

R. RUDENKO, Dnipro State Technical University

Postgraduate student of the department of metallurgy of ferrous metals and pressure metal processing

K. CHUBIN, Dnipro State Technical University

candidate of sciences, associate professor of the department of metallurgy of ferrous metals and pressure metal processing

M. KASHCHEEV, Dnipro State Technical University

candidate of sciences, associate professor of the department of metallurgy of ferrous metals and pressure metal processing

M. RUDENKO, Dnipro State Technical University

candidate of sciences, associate professor of the department of metallurgy of ferrous metals and pressure metal processing

O. CHUBINA, Dnipro State Technical University

candidate of sciences, associate professor of the department of metallurgy of ferrous metals and pressure metal processing

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Published

2024-02-27

How to Cite

SIGAREV Е., RUDENKO, R., CHUBIN, K., KASHCHEEV, M., RUDENKO, M., & CHUBINA, O. (2024). New Technical Solutions for Increasing the Active Cross-Section Area of Fire Grates of Sintering Machine. Science and Innovation, 20(1), 87–97. https://doi.org/10.15407/scine20.01.087

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Section

The Scientific Basis of Innovation