Coal Mining and Processing
Processing the Coal. After coal comes out of the ground, it typically goes on a conveyor belt to a preparation plant that is located at the mining site. The plant cleans and processes coal to remove dirt, rock, ash, sulfur, and other unwanted materials, increasing the heating value of the coal. For more posts like these, be sure to visit ...
CHAPTER 3 Coal Preparation and Cleaning
Most coal requires some preparation before use. Preparation may range from simply crushing to provide a size consist suitable for certain types of boilers to extensive size …
Removal of sulfur at high temperatures using iron-based sorbents
Xie et al. (2010) prepared iron-based sorbents by physically mixing of iron oxide and cerium oxide with fine coal ash serving as the support for simultaneous removal of H 2 S and COS at 400-650 ...
Migration behaviors of arsenic and sulfur from coal during …
Qi Y Q, Li W, Chen H K, Li B Q. Sulfur release from coal in fluidized-bed reactor through pyrolysis and partial oxidation with low concentration of oxygen. Fuel, 2004, 83(16): 2189âˆ'2194. [9] Li D, Zhang C, Zia J, Zheng Y, Yang L, Chen G. The removal behavior of sulfur forms in coal during different pretreatment before coal combustion.
Process for removal of sulfur and ash from coal
A process for reducing the sulfur and ash content of coal wherein coal particles are treated with a conditioning agent in an aqueous slurry prior to agglomeration ... The rank of the feed coal can vary over an extremely wide range and still permit pyritic sulfur removal by the process of this invention. However, bituminous coals and higher ...
320. Biological Removal of Sulfur from Coal through Use …
Bacterial desulphurization of coal using Thiobacillus ferrooxidans was studied for bioprocess parameter optimization to remove total sulphur (inorganic and organic) maximally. The optimum time of ...
Mechanism for Removal of Organic Sulfur from Guiding Subbituminous Coal
Ash in Guiding subbituminous coal (GSBC) was removed by treatment with dilute acids. The treated GSBC (TGSBC) was extracted with isopropanol (IP) to afford IP-extractable fraction (IPEF). TGSBC was sequentially extracted with petroleum ether, carbon disulfide, acetone, and methanol. Octane-1-thiol and thiophene were selected as model …
Desulfurization of high sulfur fine coal using a novel …
The removal of sulfur from coal has ... ABSTRACT This study focused on the separation performance of a typical high-ash coal with high-mud content in the enhanced gravity field from the viewpoint of desliming. ... the underground coal-mining industry has increased the volume of fine size coal and waste (refuse) in the mined coal. …
Removal of Sulfur Dioxide from Flue Gas by the Absorbent …
Removal of SO2 from flue gas by the absorbent prepared from coal fly ash, calcium oxide, and calcium sulfate was studied under different reaction conditions to elucidate the effects of the reaction temperature, water vapor pressure, and coexistence of NO in a flue gas. The SO2 removal activity increased with an increase in NO …
Feasibility of using ultrasound-assisted process for sulfur and ash
The full utilization of coal is limited by the presence of high levels of sulfur and ash in it. Therefore, removal of mineral matter and sulfur from coal prior to its utilization is necessary [2]. Many researchers have tried to find an economically practical process for removing sulfur from coal, but no such process has been developed yet [3].
Selective sulfur removal from semi-dry flue gas desulfurization coal
@article{osti_1756435, title = {Selective sulfur removal from semi-dry flue gas desulfurization coal fly ash for concrete and carbon dioxide capture applications}, author = {Ragipani, Raghavendra and Escobar, Eleanor and Prentice, Dale and Bustillos, Steven and Simonetti, Dante and Sant, Gaurav and Wang, Bu}, abstractNote = {High …
A model for alkaline removal of sulfur from a low-rank coal
A model for a lkaline removal of sulfur from a low-ran k coal, Fuel Processing Technology 60(3):18 5-194(1999) Table 1. Basic composition of the original coal (wt % as-analyzed)
Removal of Sulfur and Ash from Coal Using Molten Caustic Leaching, a
The best removal of ash was observed by using 1 M bortrifluorid (BF3) solution at 250°C and 70 atm. Depending on the leaching conditions and coal used, reductions ranged from 5% to 36% in sulfur ...
Mechanism of sulfur migration and conversion in
When ash heat carrier and dolomite catalyst were simultaneously added to the system, the sulfur fixed in ash increased from 79.29 % of the raw coal to 91.27 %, and the sulfur fixed in natural dolomite and modified dolomite accounted for 4.32 % and 4.46 % of the total sulfur, respectively.
Ultrasonic coal-wash for de-sulfurization
Coal will continue to be a major fuel source for the foreseeable future, but its use is limited by ash and sulfur impurities. Cost-effective, high-throughput removal of …
Rapid Estimation of Sulfur Content in High-Ash …
High-ash Indian coals are primarily used as thermal coal in power plants and industries. Due to the presence of sulfur in thermal coal, flue gas is a major environmental concern. Conventional methods …
Sulfur Removal from Coal with The Basic Extraction …
Sulfur Removal from Coal with The Basic Extraction Liquid of Oak Ash. December 2021. Journal of the Institute of Science and Technology 11 (4):2613-2620. …
Aqueous metal ion leaching processes from high sulfur coal fly ash …
The aim of this study is to characterize potential utilization pathways of high-sulfur fly ash from coal combustion plants for the purpose of fixing CO 2 and producing high purity carbonates via carbon mineralization process. Unlike other typical fly ashes, the feedstock in this study contains a mixture of fly ashes and desulfurization residues.
Designing coal preparation circuit for cleaning high …
Designing coal preparation circuit for cleaning high ash and high sulfur Punjab (Pakistan) coal to meet end-user requirements. Modern coal preparation plants are designed to achieve maximum overall clean coal …
Removal of Sulfur and Ash from Coal Using Molten …
Molten caustic leaching process is effective in reducing significant amount of ash derived from minerals, pyritic sulfur, and organic sulfur from coal. The effect of …
Organic sulfur and hap removal from coal using …
The sulfur content of the coal solids is shown in Table 2. Table 2. Hydrothermal treatment conditions for sulfur removal from bituminous coals and sulfur content in solid residue and selected tar fractions on an MF basis. Particle size (mesh) Temperature (°C) Pressure (psig) Solid sulfur (wt.%) Tar sulfur (wt.%) IBC-101.
Name already in use
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Removal of sulfur and mineral matter from coal slurry by a …
Under optimum conditions, a clean coal was obtained having 8.10% ash, 1.56% total sulfur, with a combustible recovery of almost 50% from coal, with 12.70% ash and 2.82% total sulfur. Keywords: clean coal ash, sulfur, magnetic separation, Jones magnetic separator Introduction High-intensity wet magnetic separation (HIWMS) is a …
Coal explained Mining and transportation of coal
Processing coal. After removing the coal from the ground, miners may send it to a preparation plant near the mining site. The plant cleans and processes coal to remove rocks, dirt, ash, sulfur, and other unwanted materials. This process increases the heating value of the coal.
Desulfurization of Coal
This effect has led to an interest in the three main methods of removing coal sulfur: coal cleaning, in-bed desulfurization, and flue gas desulfurization. Coal cleaning includes …
Process for removal of sulfur and ash from coal
A process for reducing the sulfur and ash content of coal wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coal-oil aggregates. The coal-oil aggregates are separated from ash and mineral matter in the slurry by dissolved gas flotation. Optionally, the coal particles may be treated with a …
Feasibility of using ultrasound-assisted process for sulfur and ash
Using new generation technologies like ultrasonic waves in the sulfur removal increases the process effi ciency of physical coal cleaning processes and/or ensure equipment savings (Angle et al ...
Mercury in Chinese Coals: Modes of Occurrence and its Removal …
As one of the dangerous trace elements in coal, mercury has become an advanced research hotspot in coal purification. The content of ash, sulfur, and mercury of raw coals from four high-Hg coal preparation plants located in the main production areas of China was tested. To distinguish the connection between mercury content and the content of ash or …
Selective sulfur removal from semi-dry flue gas desulfurization coal
Sulfite removal from high-sulfur coal fly ash is rapid and selective in acidic pH. ... As such, we propose a combined process of sulfur removal and carbon dioxide capture illustrated in Fig. 4. This process is a two-stage absorption-washing process, where the first stage involves the absorption of carbon dioxide from flue gas into FGD …
Method for sulfur removal from coal fly ash (Patent)
Abstract. A method of reducing sulfur concentration in fly ash, flue gas desulfurization (FGD) ash, and mixtures thereof by contacting the fly ash, FGD ash, or mixtures thereof with an aqueous acidic solution, for a time, at a temperature, and at a liquid-to-solid ratio wherein the sulfur concentration within the fly ash, FGD ash, or …
