Effect of reductant sodium bentonite content and reaction temperature in sponge iron production from composite pellets

Kara, İ̇lker

doi:10.1007/s11771-021-4705-y

Cited by 2 publications

(1 citation statement)

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“…These mechanical forces can cause some pellets to break up and produce fines, which can affect furnace operation and production targets. In order to solve these problems, it is possible to increase the density and mechanical strength of the pellets by adding binders to fill the gaps and cracks between the ore particles and bond them together [5][6][7]. In the steel industry, binders are essential for the pelletization of iron ore concentrates.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Influence of Drying and Preheating Parameters on the Roasting Properties of Limonite Pellets

Chen,

Zhou

2024

Minerals

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In this experiment, a pellet preparation method was investigated to study the drying, preheating, and roasting properties of limonitic iron ore from a plant in Yunnan. The aim was to improve the subsequent iron-making process of limonitic iron ore and make it a substitute for sintered ore. This substitution would reduce the amount of blast furnace slag in the iron-making process. Bentonite is commonly used as a primary binder in many pelletizing plant operations. However, its excessive usage leads to a higher risk of slagging and coking in the furnace. In this paper, we aim to decrease the quantity of bentonite added, enhance the iron content in the pellets, and reduce impurities to improve the grade of limonite pellets. The results show that the optimal drying, preheating, and roasting temperatures of limonite pellets are 200 °C, 700 °C, and 1250 °C, respectively, and the optimal roasting time is 20 min, when the diameter of the pellets is 8–13 mm. The compressive strength of limonite pellets with the addition of 1.5% bentonite was the highest, meeting the demands of a general blast furnace, based on which the iron grade of limonite pellet ore was increased by 10.63%.

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Section: Introductionmentioning

confidence: 99%