Thermodynamic and kinetic studies of dissolution of hematite in mixtures of oxalic and sulfuric acid

P Vehmaanperä, R Salmimies, A Häkkinen - Mining, Metallurgy & …, 2021 - Springer
The dissolution of iron oxides in mixtures of acids is fairly uncommon but can result in a
more efficient dissolution process. The objective in this work was to investigate the …

Surface attached cultivation and filtration of microalgal biofilm in a ceramic substrate photobioreactaor

N Dalirian, HA Najafabadi, S Movahedirad - Algal Research, 2021 - Elsevier
In this research, a capillary ceramic membrane was used as the substrate for surface
attached cultivation of microalgae. A photobioreactor was constructed and tested for …

Regeneration assessments of filter fabrics of filter presses in the mining sector

B Fränkle, P Morsch, H Nirschl - Minerals Engineering, 2021 - Elsevier
In addition to investment costs, ongoing operating costs represent a major economic aspect
of a process plant. From an entrepreneurial point of view, these should be as low as …

Dissolution of Magnetite and Hematite in Mixtures of Oxalic and Nitric Acid: Mechanisms and Kinetics

P Vehmaanperä, T Sihvonen, R Salmimies… - Minerals, 2022 - mdpi.com
Dissolution mechanisms and kinetics have a key role in better understanding of processes.
In this work, magnetite and hematite powder were dissolved in oxalic and nitric acid mixtures …

Formation of humboldtine during the dissolution of hematite in oxalic acid–density functional theory (DFT) calculations and experimental verification

P Vehmaanperä, B Gong, PHL Sit… - Clays and Clay …, 2021 - cambridge.org
Understanding the reactions taking place in the hematite-oxalic acid system is important in
order to clean iron oxides from filters and to remove iron from mineral concentrates. Previous …

Influence of process variables on the ceramic capillary filtration of iron ore slurries

AM Araujo Jr, SCA França, LM Tavares - Minerals Engineering, 2022 - Elsevier
Although ceramic capillary filtration is a novel technology, it is proving rapidly to be an
attractive alternative for dewatering slurries in the minerals industry. For instance, it has …

[PDF][PDF] Detachment of fine-grained thin particle layers from filter media

P Morsch - 2021 - d-nb.info
The present work contains the scientific study of the detachment of filter cake fragments from
filter cloths and is to be classified chronologically in the process of regeneration, which takes …

Energy analysis of the convective drying of iron ore fines: Original scientific paper

AS Souza, TC de Souza Pinto, AM Sarkis… - Chemical Industry & …, 2023 - ache-pub.org.rs
Drying operations in iron ore processing plants have a particularly high energy demand due
to the massive solid flow rates employed in this industry. A 3 3 full-factorial design was …

Secagem convectiva de concentrado de minério de ferro: abordagem experimental e simulações por fluidodinâmica computacional

R Béttega - 2023 - repositorio.ufscar.br
Os chutes de transferência convencionais são equipamentos utilizados para mudar a
direção do escoamento de sólidos dos transportadores de correia. Durante a operação, o …

Dissolution of magnetite and hematite in acid mixtures

P Vehmaanperä - 2022 - lutpub.lut.fi
As the quality of raw materials decreases and legislation tightens, interest in various
alternative materials has grown. For example, raw materials often contain iron as an …