Zn Loss into ZnFe2O4 in an Open Type Electric Arc Furnace: An In-Process Separation Performance Model

Abstract

In order to reduce the burden of electric arc furnace dust on steel recycling plants, a new technology called in-process separation (IPS) was proposed. By separating Zn vapor from the solid particles in the electric arc furnace off-gas, production of Zn-containing electric arc furnace dust may be prevented. However, the spinel formation reaction at high temperatures and its impact on the technology's feasibility still require better understanding. This paper demonstrates a model that was developed to provide this insight, based on the results of our previous work on the kinetics of the spinel formation.This model evaluates the performance of IPS based on four key process parameters: the position of the separation unit, the timetemperature profile inside the off-gas duct, the solid particle size distribution, and the initial Zn and Fe content of the off-gas. The impact on the efficiency of each parameter was demonstrated using the results of the model for a specific off-gas treatment setup.

l-Methionine-Zr complex supported on magnetic ZnFe2O4 as a novel, green, and efficient heterogeneous magnetic nanocatalyst for the synthesis of 1H-tetrazole and polyhydroquinoline derivatives

“…Moreover, X-ray mapping analysis of the recovered catalyst was carried out to study the physical stability of the magnetic nanoparticles during the reaction (Fig. 5 (10)(11)(12)(13)(14)(15)(16)(17)(18)). The ordered distribution of Zn, Fe, C, Si, S, N, O, and Zr on the spent catalyst surface shows the high stability of the prepared catalyst under the reaction conditions.…”

“…As a main member of the ferrite family, ZnFe 2 O 4 is a promising potential for use as a novel catalytic support. 13,28,33,34 In addition, the surface hydroxyl groups of zinc ferrite facilitate its surface modification with a wide variety of organic compounds. 35,36…”

“…[10][11][12] In catalytic studies, the recovery and reusability of the catalyst due to its adaptability to the environment are important features of the catalytic process that have received much attention in recent years. [13][14][15] Recently, the use of magnetic nanoparticles as a catalytic support in the preparation of nanocatalysts via green methods has been considered by scientific researchers. 9,16,17 Magnetic materials such as zinc ferrite, due to their unique and non-toxic magnetic properties, 18 good biological compatibility, 19 and adjustable magnetic properties, 20 have been used in various fields including cancer therapy, 21 drug delivery, 22 and targeting.…”

“…As a main member of the ferrite family, ZnFe 2 O 4 is a promising potential for use as a novel catalytic support. 13,28,33,34 In addition, the surface hydroxyl groups of zinc ferrite facilitate its surface modification with a wide variety of organic compounds. 35,36 ''Green chemistry'' has demonstrated how environmental problem-solving strategies can protect human health and the environment in an economically beneficial manner.…”

Thermodynamic analysis of zinc ferrite (ZnFe2O4) formation inside the HIsarna off-gas system

“…In the HIsarna process, similar to EAF, the Zn vapour content in the flue gas can end up into two main zinc-bearing compounds. It could react directly with oxidants such as O 2 , CO 2 or H 2 O to form ZnO or react with oxygen and prereduced ore (mainly Fe 3 O 4 ) to form ZnFe 2 O 4 [10][11][12][13]. In this context, ZnO is a favourable by-product since Zn recovery from ZnFe 2 O 4 , due to its high stability, requires further treatment [2].…”