Investigating possibility of using briquettes containing fine of pellets and reduction sludge in a direct reduction reactor

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Habibi Nezhad Saeid; Afsahi M. Mehdi

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Journal Paper

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Journal: METALLURGICAL ENGINEERING Year:2024 | Volume:27 | Issue:1 Page(s): 32-41

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Information Journal Paper

Title

Investigating possibility of using briquettes containing fine of pellets and reduction sludge in a direct reduction reactor

Author(s)

Habibi Nezhad Saeid | Afsahi M. Mehdi | Issue Writer Certificate

Keywords

briquette

Fine of pellets

Reducing sludge

Iron oxide

Reduction

Abstract

Two unconverted by-products, fine of pellets and reducing sludge, are produced during processing in sponge iron production Companies. In the present research, possibility of the by products briquetting and also direct charge, along with the reactor feed, into the reduction furnace have been investigated. The mentioned byproducts were changed to the briquettes with more than 6.3 mm size (quarter inch) by briquetting jack machine under 300 bar pressure, and their reducibility and strength were tested during passage from the reduction reactor. Experiments showed, the produced briquettes had a low strength to tolerate inserted stresses during moving in the furnace. Using sodium silicate solution (1.25-5 weight percent) as a binder in the composition of the briquettes, to prevent crushing, increased their strength more than 40 times. To increase total Fe of the samples and reaching a standard level, 15-20% sponge iron powder was added into the briquettes, increased total iron from 84% to 88% averagely.

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