INFLUENCE OF TRANSSHIPMENT OF HOT-BRIQUETTED IRON DURING TRANSPORTATION ON ITS REACTIVITY-Reference-Cited by-同舟云学术

INFLUENCE OF TRANSSHIPMENT OF HOT-BRIQUETTED IRON DURING TRANSPORTATION ON ITS REACTIVITY

Published:2022-12-16 Issue:10 Volume:78 Page:845-850
ISSN:2619-0753
Container-title:Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information
language:
Short-container-title:Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

Author:

TIMOFEEVA A. S.¹,KOZHUKHOV A. A.¹,NIKITCHENKO T. V.²,KOROTKOVA L. N.¹

Affiliation:

1. Stary Oskol Technological Institute named after A.A. Ugarov (branch) of NITU “MISiS”, Russia, Belgorod rgn., Stary Oskol

2. NIKITCHENKO

Abstract

During the transportation of hot-briquetted iron (HBI), the metallized product undergoes secondary oxidation, which negatively affects its metallurgical properties. In the course of research, the influence of the strength of HBI on the oxidation process of the metallized product was established. To determine the change in the physical characteristics of briquettes during their destruction, a simulation of mechanical effects in the processes of transshipment during transportation from the manufacturer to the port of loading was carried out. A general view of the installation for simulating transshipment during transportation of HBI is given. The briquettes were dropped from a height of 2, 2‒4 and 6 m to simulate their fall from a height, respectively, into a railway car when loaded at the sender's station, the opening of the grab when unloading to the site of an open warehouse and the opening of the grab when loading into the hold of the vessel. A histogram of the percentage destruction of briquettes depending on the height of the discharge is given. The reactivity of various fractions of HBI has been determined. It is shown that the reactivity of the metallized product increases when the size of the briquette fraction decreases, and it depends on the specific surface area and porosity of the material, temperature and humidity of the environment. With insufficient strength during transportation, the briquettes are destroyed, as a result their oxidation process is accelerated, since the reactivity of halves and small pieces of the destroyed briquettes is higher by 60% and 76%, respectively, than the whole ones. It is recommended to reduce the reactivity, and hence the rate of secondary oxidation of the metallized product, by optimizing the number of transshipments and the heights from which they are carried out. It is advisable to reduce the height of transshipment to 1.5 m, and pay attention to the strength of the briquettes after pressing

Publisher

South Ural State University

Subject

General Medicine

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