The influence of humic acid on the compressive strength of green and indurated pellets was explored. The results indicate that humic acid enhances the strength of green pellets but reduces that of indurated limonite pellets, which exhibit lower compressive strength compared to bentonite-based pellets.
A novel composite binder (humic acid modified bentonite, HAMB) and two other binders (bentonite and Modified humic acid, MHA) were used to explore the effects of binders on the properties of magnetite green pellets in this study. ... The binder is an important additive widely applied in pelletizing iron ore concentrates, making iron ore …
Humic acid, extracted from poor lignite, is a kind of organic macromolecule polymer consisted of carboxyl groups and hydroxyl groups [6]. Theoretically, humic acid should be a better alternative because of their ideal adhesive molecular conformation. A few of researches have been carried on humic acid used as binders for pelletizing.
DOI: 10.1016/j.renene.2020.08.096 Corpus ID: 225036835; Valorization of lignite wastes into humic acids: Process optimization, energy efficiency and structural features analysis
The effect of different proportions of humic acid on the compressive strength of the roasted pellets is illustrated in Figure 5D; when the proportion of humic acid in the pellet ore increases from 0.4% to 2.0%, the average compressive strength of the roasted pellets decreases, reaching a minimum value of 417 N at a humic acid content of 2.0%.
Humic acid is inexpensive, and has a wide range of sources and a strong adsorption force with the surface of iron ore, and the size of its adsorption force is affected by some …
In order to pursue the goal of low-carbon ironmaking, a new type of humic acid (HA)-based binder was applied to the preparation of oxidized pellets from vanadium-bearing titanomagnetite (VTM) in this work. Effects of the HA binder (or with limestone) on the balling, preheating, and roasting behaviors of VTM were comparatively studied with …
Characterization of modified humic substances based binders for iron ore agglomeration was examined by chemical analysis, optical density, Fourier transform infrared spectrum (FTIR), and thermogravimetry and differential scanning calorimetry (TG–DSC). Chemical analysis displays the proportion of fulvic acid (FA) to humic acid (HA) in the binder is …
A novel composite binder (humic acid modified bentonite, HAMB) and two other binders (bentonite and Modified humic acid, MHA) were used to explore the effects of binders on the properties of magnetite green pellets in this study. ... The binder is an important additive widely applied in pelletizing iron ore concentrates, making iron ore …
DOI: 10.1016/J.POWTEC.2016.08.042 Corpus ID: 100074281; Effects of metal cations on the fulvic acid (FA) adsorption onto natural iron oxide in iron ore pelletizing process @article{Zhou2016EffectsOM, title={Effects of metal cations on the fulvic acid (FA) adsorption onto natural iron oxide in iron ore pelletizing process}, author={Youlian Zhou …
the pelletizing rate. Humic acid molecules contain a large . number of solidophilic and hydrophilic functional groups . such as carboxyl and hydroxyl, which improve the adsorp-
Humic acid (HA) is a typical refractory organic matter, so it is of great significance to investigate its effect on the performance of Anammox granular sludge. ... Effects of metal cations on the fulvic acid (FA) adsorption onto natural iron oxide in iron ore pelletizing process. Powder Technology, Volume 302, 2016, pp. 90-99.
Humic acid as a binder in the pelletizing process has been used and found that it can strongly adsorb on the surface of iron oxides (hematite and magnetite), while its adsorption on the quartz ...
This chapter shows the status of the pelletizing process with a special focus on binders. Bentonite is the most used binder due to favorable mechanical and metallurgical pellet properties, but it contains impurities especially silica and alumina. ... MHA (fulvic acid and humic acid) Viscosity, zeta potential, pH, adsorption kinetic: Drop number ...
DOI: 10.1016/J.POWTEC.2014.10.045 Corpus ID: 93660026; A further study on adsorption interaction of humic acid on natural magnetite, hematite and quartz in iron ore pelletizing process: Effect of the solution pH value
However, humic substance-based binders were not commonly used in pelletization since some pelletizing results indicated they were not as good asbentonite …
Application of modified humic acid (MHA) binder in the pelletizing of fluxed hematite concentrate. Y Zhou, P Wattanaphan, SK Kawatra. Mineral Processing and Extractive Metallurgy Review, 2017. 17: 2017: Optimizing the mass ratio of two organic active fractions in modified humic acid (MHA) binders for iron ore pelletizing.
Modified humic acid (MHA) binder consists of high molecular weight organic molecules and inorganic part. It is extracted from lignite coal with sodium hydroxide and used in pelletization of iron ...
A modified humic acid (MHA) binder was tested as a substitute for bentonite to prepare qualified specularite pellets. The results show that there is stronger chemisorption between organic functional groups in MHA binder molecular and specularite particles, improving the green pellet strength. MHA binder has obvious effect on the …
A further study on adsorption interaction of humic acid on natural magnetite, hematite and quartz in iron ore pelletizing process: Effect of the solution pH value Zhou Youlian Yuanbo Zhang Guanghui Li Wu Yudong T. Jiang
Environmental behavior, bioavailability, and risks posed by Fe3O4, magnetic nanoparticles (Fe3O4 NPs) in surface waters are affected by complex geochemistry, including pH and inorganic and organic matter. This work provides a systematic analysis of adsorption of fulvic acid (FA) on surfaces of Fe3O4 NPs with …
Humic acid as a binder in the pelletizing process has been used and found that it can strongly adsorb on the surface of iron oxides (hematite and magnetite), while its adsorption on the quartz ...
Organic binder is a significant substitution of the bentonite in iron ore pelletizing process, reducing the exploitation of clay resource and improving the quality of pellets. Fulvic acid is one of the important functional groups of modified humic acid (MHA) binder which is invented by the authors and can be used as an excellent composite …
2001. 1. This paper describes a new coal pelletization process that utilizes a coal-derived binder consisting of a water-soluble colloidal system of humic acids dispersed in an …
Download scientific diagram | Chemical composition and content of FA and HA from publication: A Review on the Humic Substances in Pelletizing Binders: Preparation, Interaction Mechanism, and ...
Fulvic acid is one of the important functional groups of modified humic acid (MHA) binder which is invented by the authors and can be used as an excellent composite binder in pelletizing. This work aims to further study the effect of metal cations on FA adsorption onto natural pure oxides and the wet strength of green pellets made with …
Based on this, humic acid or humate salt were also used as binders for solid fuel agglomerates (Wen, 1986). In 1966, an amine humate salt was invented as a pelletizing aid to improve the efficiency of the rip t pelletizing process and pellet strengths (Goretta, et al., 1966). ... T., 2012a, "Optimizing the mass ratio M of two organic active ...
In real soils the interaction of humic substances with clay minerals often occurs with the participation of metal cations. The adsorption of fulvic acids (FA) solution and their solutions in the presence of heavy metal ions (Pb or Zn) on two clay minerals (kaolinite and bentonite) was investigated by measurement of the optical density …
A further study on adsorption interaction of humic acid on natural magnetite, hematite and quartz in iron ore pelletizing process_ Effect of the solution pH value Article Nov 2014
Modified humic acid (MHA) binder consists of high molecular weight organic molecules and inorganic part. It is extracted from lignite coal with sodium hydroxide and …
Fulvic acid is one of the important functional groups of modified humic acid (MHA) binder which is invented by the authors and can be used as an excellent composite binder in pelletizing.
Modified humic acid (MHA) binder consists of high molecular weight organic molecules and inorganic part. It is extracted from lignite coal with sodium hydroxide and used in pelletization of iron ore concentrates. Our previous study shows that MHA binder is also a potential binder instead of bentonite for pelletizing of fluxed hematite.
Fulvic acid is one of the important functional groups of modified humic acid (MHA) binder which is invented by the authors and can be used as an excellent composite binder in pelletizing.
To compensate for this defect and make stronger pellets, cheap calcium bentonite was added into humic substance binder. In this study, a fluxed hematite …
Modified humic acid (MHA) binder based on lignite humic substances is a novel sort of promising organic binder for iron ore pellets. Humic acid (HA) is one of the main ingredients of MHA binder. Pure HA was firstly isolated from lignite and then adsorption of HA onto magnetite particle surface was investigated. The final results …