It can be inferred that no matter the preparation method, while using lignite as pellet binder, it is essential to activate ed lignite with an alkalic compound via either extracting …
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and ...
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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 …
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Therefore, the viscosity and adsorption density of humic acid-based pellet binder can be increased by adjusting the pH and concentration of the HA/FA solution or adding metal …
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Therefore, the viscosity and adsorption density of humic acid-based pellet binder can be increased by adjusting the pH and concentration of the HA/FA solution or adding metal cations to obtain ...
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1. Introduction. Humic acid (HA) is a kind of natural organic matters widely present in lignite, danty and natural waters (such as lakes, groundwater and rivers) (Wang et al., 2012; Kavurmaci and Bekbolet, 2013).The interaction between HA and natural mineral particles in presence of water is a very important research subject in a wide range of …
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To compensate for this defect and make stronger pellets, cheap calcium bentonite was added into humic substance binder. In this study, a fluxed hematite concentrate was pelletized with various types of binders: lignite plus sodium hydroxide, …
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The humic acid-based binder used in this study was extracted from lignite in Guizhou Province, China. The industrial analysis results and the chemical composition of the binder
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and ...
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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.
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and fired pellet strength. Therefore, humic acid pellet binder can partially or completely replace bentonite and meet the requirements of various iron ore pellet production.17) 2. …
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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 factors such as humic acid concentration, pH of the solution, and metal cations. The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained …
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It can be inferred that no matter the preparation method, while using lignite as pellet binder, it is essential to activate ed lignite with an alkalic compound via either extracting or milling process. ... China, pp. 1-174. Li, P., 2012, "Research on the Adsorption of Lignite Humic Acid onto Natural Iron, Titanium pt and Silica Oxide Ores ...
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and ...
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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 …
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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 … Expand. 31. 1 Excerpt; Save.
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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 …
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In this study, a comparative study of adsorption characteristics of humic acid (HA) onto Ca-montmorillonite and Na-montmorillonite were carried out to guide the preparation of a novel composite binder for iron ore pellets, namely humic acid modified bentonite (HAMB). Using Ca-montmorillonite (Ca Mt) as a representative, the adsorption …
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Abstract. 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 ammonium hydroxide solution. Fine-coal pellets produced by this process were subjected to various physical-strength and weather-resistance tests.
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ABSTRACT Humic substances exist widely in lignite coal as high molecular weight organic molecules. They can be used as binders in iron ore pelletization mostly in …
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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 …
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ABSTRACT Modified humic acid (MHA) binder consists of high molecular weight organic molecules and inorganic part. It is extracted from lignite coal with sodium …
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The modified humic acid pellet binder (MHA) ... The coal-alkali ratio and liquid-solid ratio make the main factors affecting the extraction of humic acid from lignite. Insufficient …
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and chemical modification treatment and successfully applied in the production process of iron ore pellets. After industrial tests, MHA can significantly
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Funa, which is a type of humic substance-based binder extracted from lignite, was successfully invented and applied in cold-bonded pellets in China. Since the organic fraction in the humic substance-based binder is burnt away during heating, leaving no contaminant in pellets and improving the iron content of the pellets, humic substance …
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and ...
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ABSTRACT Due to the reducing ability and bonding effect, a humic substance-based binder has been added into iron ore pellets, both as a reductant and a binder. However, humic substance-based binders were not commonly used in pelletization since some pelletizing results indicated they were not as good asbentonite or other …
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An innovative binder extracted from inferior lignite, namely modified humic acid (MHA), has been invented and proven to be an effective binder for magnetite pellets by the authors' research group ...
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The modified humic acid pellet binder (MHA) with strong adhesion and high viscosity was obtained through the separation and purification of solid wastes such as lignite and weathered coal and ...
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and fired pellet strength. Therefore, humic acid pellet binder can partially or completely replace bentonite and meet the requirements of various iron ore pellet production.17) 2. The Extraction of Humic Acid from Humic Sub-stances Humic acid is widely distributed in nature and is found in low-order coals such as peat, lignite, and weathered coal,
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