Molecular simulation of CO production and adsorption in a …
To reveal the mechanism of CO gas generation and adsorption in coal gangue slits at the microscopic level, a new composite kaolinite–coal–kaolinite (KCK) …
Coal Production Kaolinite
Study on the Reactivity Activation of Coal Gangue for …
Coal is one of the important non-renewable resources and related to global energy security. In recent years, coal consumption has accounted for over 50% of the one-time energy consumption in China [].Coal gangue is the main solid waste generated during the coal mining and washing process, which accounts for 15% to 20% of the coal …
Coal Fines Migration, Deposition, and Output Simulation
Critical values for production pressure drawdown were obtained, above which failure area began to expand; threshold values were also determined, below which remarkable reduction of coal fines ...
Selective extraction of aluminum from coal-bearing kaolinite …
Coal-bearing kaolinite (CBK) is a solid waste generated during coal production. Despite being a potential source of aluminum, CBK presents a great challenge in terms of Al recovery.To tackle this challenge, we used a room-temperature mechanochemical method based on mechanical grinding and sulfuric acid treatment. …
Effect of Inhibitors on Hydrogen Bond Reduction …
The mineral composition of coal consists of 75.6% kaolinite, and inhibition leads to a reduction in kaolinite content by 0.8–7.9%. After inhibition, the swelling and disintegration of kaolinite cause uneven …
Geochemistry and mineralogy of Late Carboniferous coal …
Xishan Coalfield is a vital coking coal production base in Shanxi Province of China. This study describes the geochemical, mineralogical, and carbon isotope values of two host rocks and ten coal benches of the Late Carboniferous (No. 8) coal of the Jialequan Mine from Xishan Coalfield. The coals are medium-ash coal (22.42%) and are …
Study on the Crystal Structure of Coal Kaolinite …
Coal kaolinite has formed special crystal structures in the long-term coal forming environment due to the lattice defect and surrounding rock symbiosis and has further significantly exhibited …
Separation and Recovery of Valuable Carbon
Coal is one of the main energy sources in many countries, and coal gangue (CG) is a kind of gray-black rock produced in the process of coal processing and washing, with low carbon content and harder than coal, generally accounting for 15%–20% of coal production in China and 25% of industrial waste emissions.
Effect of original crystal size of kaolinite on the formation of
DOI: 10.1016/j.mtcomm.2023.106130 Corpus ID: 258546535; Effect of original crystal size of kaolinite on the formation of intercalation compounds of coal-measure kaolinite @article{Li2023EffectOO, title={Effect of original crystal size of kaolinite on the formation of intercalation compounds of coal-measure kaolinite}, author={Yakui Li and Qinfu Liu and …
Adsorption of Anionic Polyacrylamide onto Coal and Kaolinite …
The coal and kaolinite samples were ground to −400 mesh. A suspension containing 0.1 wt % coal or kaolinite was prepared in the deionized water. The prepared suspensions were kept in an ultrasonic bath for 10 min. The PAM A401 solution (100 mg·L −1) with a volume of 24 mL was added to the prepared coal or kaolinite suspensions to …
The preparation of high-yield uniform nanotubes from coal-measure kaolinite
Coal-measure kaolinite was an associated mineral of coal, which was mainly produced from the process of coal mining and beneficiation. The explored reserves of coal-measure kaolinite in China were about 1.673 billion tons. and the prospective reserves of 5.529 billion tons (He et al., 2019). As a non-metallic mineral resource, Coal …
The preparation of high-yield uniform nanotubes from coal-measure kaolinite
Section snippets Materials. The coal-measure kaolinite used in this research was obtained from the Tashan coal mine, Datong coalfield, Shanxi Province of China, with the mineral showing a well-crystallized structure, the quantitative analysis from the XRD pattern showed that 99.7% of kaolinite and 0.3% of quartz contained in coal-measure …
Molecular simulation of CO production and adsorption in a coal …
To reveal the mechanism of CO gas generation and adsorption in coal gangue slits at the microscopic level, a new composite kaolinite–coal–kaolinite (KCK) slit model was constructed by combining the Hongqingliang (HQL) coal molecular model and the Bish kaolinite model to characterize the crack structure of the gangue. It is …
Effect of original crystal size of kaolinite on the formation of
Coal-measure kaolinite, a kind of hard rock composed of flaky kaolinite and other related minerals, has specific characteristics in appearance, structure, chemical composition, and physical properties [1]. ... the nano properties of kaolinite could inevitably affect technical indicators in industrial production, such as high whiteness, good ...
Experimental Investigation of the Impact of Coal …
Coalbed Methane (CBM) has become an important gas resource in recent decades. The brittle property of coal matrix and overactive operation make the migration of coal fines inevitable. Blockage by coal fines that plugs …
Mineral phase transformation in coal gangue by high …
The valuable components of alumina and silica in coal gangue mainly come from kaolinite. As shown in Fig. 2 [23], kaolinite is a typical layered silicate material, belonging to the triclinic system.Kaolinite is connected by Al–O octahedrons and Si–O tetrahedrons through fixed-point oxygen, extends in the a-axis and b-axis directions, and …
Interaction forces between coal and kaolinite particles measured …
1. Introduction. Froth flotation is an effective separation method for fine coal cleaning. In this method, separation is achieved because of the differences in surface hydrophobicity between organic and mineral matter [1], [2], [3].It is well accepted that fine minerals, mainly clays (kaolinite, illite, and montmorillonite), have a detrimental effect …
Kaolinite flakes and coal fines production in lignite core …
The earlier reports indicate the importance of kaolinite content on coal seams and recently, vermicular kaolinite content was found in the fly ash that was processed from the pulverized coals from the Indian (Bokaro and Jharia, Jharkhand) coal fields (Valentim et al., 2016).Hence the objective of this paper is to investigate the kaolinite clay and coal …
Alkali Methods for Alumina Extraction from the By-products …
The main inorganic minerals in the HAC with A/S (mass ratio of alumina to silica) of ~1.0 are kaolinite and boehmite, together with small amount of quartz, hematite, and anatase [10, 11]. During coal mining and washing, about 10–15% of the total coal production is discarded in the form of coal gangue; meanwhile, a certain amount of …
DF2014:Kaolinite
Kaolinite is a magma-safe dark red stone, much like bauxite, found in sedimentary layers.Kaolinite has a material value of 1 like most stone, but can be made into medium value porcelain goods at a kiln or magma kiln.. Potters ordered to make clay or ceramic goods will use the closest source of clay, fire clay, or kaolinite by default. If you want to …
Experimental Study on the Influence of Hydrochemical …
Semantic Scholar extracted view of "Experimental Study on the Influence of Hydrochemical Properties on the Migration of Coal Fines Containing Kaolinite in Propped Fractures" by Ziliang Liu et al. ... Block in the Ordos Basin is currently one of the most successfully developed and largest gas field of low–medium rank coal in China. …
Potential of Selected South African Kaolinite Clays for …
Kaolinite clays produce reactive minerals when calcined to around 800 °C . The use of calcined kaolinite clay in concrete reduces the amount of energy used in the production of clinker and CO 2 emissions. Energy saving occurs because the calcination temperature of clays is lower than that of clinker and they are also easy to grind.
Preparation of Calcined Kaolin by Efficient Decarburization of …
Abstract. A clean and efficient method was used to prepare kaolinite nanotubes from coal-measure kaolinite. Dimethyl sulfoxide, methanol, and …
Coal mining waste as a kaolinite source for production of …
Calcined coal gangue powder was used to partially replace Portland cement (PC) at 10%, 20%, 30%, and 40% by weight. The water to binder ratio (w/b) of 0.5 was used for all the blended cement paste ...
Analysis, origin and significance of mineral matter in coal: An …
However, many of the individual minerals in coal may form in different ways; for example kaolinite may occur as detrital grains, pellets or aggregates, as syn-depositional or early diagenetic pore fillings, or as epigenetic fracture infills, even within the same coal sample (Permana et al., 2013), making genetic categorisation difficult if ...
Effect of original crystal size of kaolinite on the formation of
1. Introduction. Coal-measure kaolinite, a kind of hard rock composed of flaky kaolinite and other related minerals, has specific characteristics in appearance, structure, chemical composition, and physical properties [1].Kaolinite is a typical 1:1 type of layered silicate mineral [2] with a crystal structure composed of silicon tetrahedral sheets …
High-efficiency extraction of Al from coal-series kaolinite …
Semantic Scholar extracted view of "High-efficiency extraction of Al from coal-series kaolinite and its kinetics by calcination and pressure acid leaching" by Min Lin et al. ... This paper investigated the production of alumina from Nawan kaolin by acid leaching with sulfuric and hydrochloric acids.
Coal-Series Kaolinite in a Suspended Bed Reactor
Chemical Composition Kaolinite Boehmite Quartz Rutile Hematite Coal Percentage content 87.32 5.70 2.37 1.35 0.36 2.78 As shown in Table 2, the contents of kaolinite and boehmite in CSK were 87.32 and
Molecular simulation of CO production and adsorption in a coal …
The three-layer macromolecular structure of kaolinite–coal–kaolinite (KCK) was established. Because the degree of coal metamorphism is low, and the sulfur content is very low, it is relatively representative. The coal molecular formula is C 140 H 118 N 2 O 19, and the kaolinite molecular formula is Al 4 [Si 4 O 10](OH) 8.
Kaolinite flakes and coal fines production in lignite core …
This paper presents the coal fines production in lignite core as a function of kaolinite. Actually, it is a clay fine particle that rests on coal surface under the dominances of the four forces, namely, lift, drag, gravity, and electrostatics.
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