coal gangue sulfur content

coal gangue sulfur content

(PDF) Detection of coal content in gangue via image …

2021-5-27 · To estimate the density and sulfur content level of high-sulfur coal, a novel approach based on image processing and the support vector machine optimized by Grey wolf optimization (GWO-SVM) was ...

Is the Coal Gangue Really Useless

2017-12-17 · Coal gangue contains a lot of carbon, sulfur, hydrogen and oxygen. After a period of stacking, it can oxidize with air and spontaneously ignite, then releasing a lot of harmful gases such as sulfur dioxide, hydrogen sulfide, and carbon monoxide in the air. ... The content of nitrogen, phosphorus, potassium and trace elements of coal gangue are ...

Quantitative Inversion of Fixed Carbon Content in Coal

2019-5-1 · Fixed carbon content is an important factor in measuring the carbon content of gangue, which is important for monitoring the spontaneous combustion of gangue and reusing coal gangue resources. Although traditional measurement methods of fixed carbon content, such as chemical tests, can achieve high accuracy, meeting the actual needs of mines via these …

Pyrite transformation and sulfur dioxide release during

Calcination is a typical process associated with the utilization of coal gangue. A concern associated with this procedure is the emission of sulfur dioxide (SO 2) this work, the …

How To Effectively Use Coal Gangue?

2021-10-13 · Coal gangue is a solid waste discharged during coal mining and coal washing. It is a dark-gray rock with lower carbon content and harder than coal that is associated with coal seams during coal formation. Including the excavation gangue in the process of roadway excavation, the gangue extracted from the roof, floor and interlayer during the excavation process, and the …

Rapid synthesis and NH3-SCR activity of SSZ-13 zeolite via …

Coal gangue is a typical waste produced during coal mining and washing. Synthesis of zeolites via coal gangue can contribute to resource recycling and environmental protection. In this study, high-silica SSZ-13 was synthesized by one-step hydrothermal synthesis from coal gangue without the traditional pretreatment methods of high-temperature roasting and alkali melting, making it …

Coal gangue detection and recognition algorithm based …

2021-9-8 · 4.1 Design and implementation of coal gangue detection and recognition device. This study proposes an method for coal gangue detection and recognition on the basis of the DCN-YOLOv3 algorithm. Firstly, the method collects real-time video images of a conveyor belt operation through an industrial camera erected perpendicular to the conveyor belt.

Sulfur content tester for coal, coke, gangue

This tester is used to determine the sulfur content in combustibles such as coal, coke and gangue. It is the main instrument in the laboratories of coal, electric power, chemical industry, metallurgy and other departments. Features. with function of split sulfur. Nice appearance; With friendly human-machine interface, easy keyboard operation

Comprehensive utilization and environmental risks of coal

2019-12-1 · It is suggested that coal gangue power plant mainly uses coal gangue with calorific value above 6.27 MJ kg −1 - 8.336 MJ kg −1 (1500 kcal kg −1 - 2000 kcal kg −1) (Wang, …

Estimate of sulfur, arsenic, mercury, fluorine emissions due …

2016-2-1 · The content of sulfur, arsenic, mercury, and fluoride in coal gangue samples (including roof, parting, floor, and mixed coal gangue) in this study is listed in Table 1.Some studies have …

Sulfur Forms, Coal Analysis, Kentucky Geological Survey, …

2019-10-7 · The testing procedures and guidelines for determining the weight percent contributions of these forms of sulfur to the total sulfur content of a coal are outlined in ASTM method D2492-02 (American Society for Testing and Materials, 2013, p. 458–462).

RSC Advances

elements of coal gangue during combustion and brick making 3, 11, 12. However, much less is known about the SO 2 emission during calcination of coal gangue. Sulfur in coal gangue can exist in both organic and inorganic forms. The forms of organic sulfur are rarely reported and their amounts are likely small.

coal-gangue

Gangue, also called coal gangue, is the solid waste discharged in coal mining process and coal washing process, black rock harder than coal. Its carbon content is low and exists along with coal seam. Gangue could be found in roof, bottom board, inter-layer, and it could be selected in washing process. The main ingredient are Al2O3, SiO2, Fe2O3 ...

Radiation characteristics of natural gamma-ray from coal

2018-1-9 · Recognition of coal and gangue (roof rock) is a key technology to realize fully mechanized top coal caving automated mining. This paper proposes to detect the instantaneous refuse content of drawn ...

Estimate of sulfur, arsenic, mercury, fluorine emissions due

2016-2-1 · Moreover, the sulfur content in the biomass in the present research and in the cited literature was very low compared to solid fossil fuels, as, for instance, the sulfur content in hard coal is in ...

Sulfur Coal

The total sulfur content of the high organic sulfur coals ranges from 3.7-4.1 wt.% with about 75% of the sulfur existing as organic sulfur (Table 2). The total sulfur content of the low organic …

Pyrite transformation and sulfur dioxide release during

Calcination is a typical process associated with the utilization of coal gangue. A concern associated with this procedure is the emission of sulfur dioxide (SO 2) this work, the behavior of SO 2 release during coal gangue calcination under an air atmosphere were systematically investigated and compared to the characteristics of SO 2 evolution from pure pyrite calcination.

Energies | Free Full-Text | Sulfur Conversion of Mixed Coal

2020-1-23 · The sulfur content of the middling and gangue was within the range of 1–3%, which can be classified as medium and high-sulfur coal. The oxygen content was higher than that of the power coal used in China; hence, it was necessary to consider the experimental influence of the relative amount of C and O in the coal sample.

Rapid synthesis and NH3-SCR activity of SSZ-13 zeolite via

Coal gangue is a typical waste produced during coal mining and washing. Synthesis of zeolites via coal gangue can contribute to resource recycling and environmental protection. In this study, high-silica SSZ-13 was synthesized by one-step hydrothermal synthesis from coal gangue without the traditional pretreatment methods of high-temperature roasting and alkali melting, making it …

Characteristics of leaching of heavy metals from low …

2021-9-6 · metal content in low-sulfur coal gangue on its leaching effect, (2) to identify leaching characteristics of heavy metals in low-sulfur coal gangue in natural environment, (3) to provide suggestion for the management and com-prehensive utilization for coal gangue. 2 Materials and methods 2.1 Sampling and preprocessing

Estimate of sulfur, arsenic, mercury, fluorine emissions due …

A rough estimate of the annual amount of sulfur, arsenic, mercury and fluoride emission from spontaneous combustion of coal gangue in China was determined. The weighted mean concentrations of S, As, Hg, and F in coal gangue are 1.01%, 7.98, 0.18, and 365.54 mg/kg, respectively. Amounts of S, As, Hg, …

Energies | Free Full-Text | Sulfur Conversion of Mixed Coal

2020-1-23 · The construction of a power plant using a 660 MWe supercritical circulating fluidized bed (CFB) boiler with co-combustion of coal and gangue has been proposed in China. Therefore, this study simulated the distribution law and transformation mechanism of sulfur-containing phases using three low-calorific samples of gangue and coal mixtures under different …

Trace Elements in Coal Gangue: A Review

2017-12-20 · Coal gangue is one of the largest industrial residues. It has high ash content, low carbonaceous content, and heating value. Meanwhile, it has some trace elements. Large quantities of coal gangue cause serious environmental …

Power Generation from Coal Gangue in China: Current …

Particulate matter emission control is a problem due to the high ash content. Sulfur emissions from these units are easily controlled mostly through lime/limestone injection and in-situ capture. Overall, efficient power generation using coal gangue is a promising approach to reduce the use of coal resources and reduce the environmental impacts.

Assessment of heavy metal in coal gangue: distribution, …

2018-9-18 · Total content of heavy metal in coal gangue. The total content of metal in gangue of different weathering degree is shown in Table 2. Besides zinc, the total amount of heavy metal was more than local background values of Shandong. ... Chen Y, Huang H, Li W et al (1988) Investigation on leaching behaviors of low-sulfur coal gangue. Chongqing ...

Study on the factors affecting the deep reduction of coal

2021-3-15 · 1. Information. With the increasing depletion of natural resources, many researchers are committed to the development and utilization of CG as a "new resource", for raw materials …

Sulfur content tester for coal, coke, gangue

This tester is used to determine the sulfur content in combustibles such as coal, coke and gangue. It is the main instrument in the laboratories of coal, electric power, chemical industry, metallurgy and other departments. Features. with function of split sulfur. Nice appearance; With friendly …

: Variation of sulfur speciation of coal ...

SOB-1 had poor effect on gangue leaching and the sulfur content variation in which was not obvious.Nevertheless, both SOB-2 and the mixed culture of SOB-1 and SOB-2 had an excellent ability on removing total sulfur and sulfur of pyrite in coal gangue ...

Excess sulfur and Fe elements drive changes in soil and …

2020-6-26 · Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. ... The CK-far plots contained relatively low soil sulfur content, normal pH ...

Excess sulfur and Fe elements drive changes in soil and …

2020-6-26 · Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. ... The CK-far plots contained relatively low soil sulfur

Effects of Site Karst Water on Fresh Coal Gangue at …

2022-10-17 · In mining areas where gangue is used for infill mining, Ordovician limestone karst water is affected by discarded gangue, and the water quality changes significantly. In this study, the effects of gangue on water quality change under different immersion solution conditions were evaluated by Zhai Zhen Coal Mine, Hongqi Coal Mine Ordovician Limestone Karst Water, and …

Method based on high sulfur coal gangue slime …

CN-106966697-A chemical patent summary.

Automatic Sulfur Content Analyzer for Coal, Coke, Gangue

2022-1-23 · Warranty:24 Months Free,After-sales Service:Life Time,Delivery Time:7-10 Days,Power Supply:AC 220V/110V, 50/60Hz,Function:Sulfur Content Measurement

Mechanism on Activation of Coal Gangue Admixture

2021-9-28 · Coal gangue, an industrial waste, is rich in silicon and aluminum phase and may be used as a mineral admixture in concrete after moderately stimulating activity, allowing for efficient solid waste utilization. This study used a mortar strength and activity evaluation method to investigate single or compound activation methods to find the optimum activation method of …

Sulfur in coals: A review of geochemistry and origins

2012-10-1 · 2. Abundance and forms of sulfur in coal. The sulfur content in coals varies considerably but is most commonly within the range of 0.5% to 5% total sulfur. The coal with …

Excess sulfur and Fe elements drive changes in soil and

2020-6-26 · The excess sulfur and Fe elements and the acidified soil drove changes in soil and vegetation in the coal gangue areas. After 8 years of natural recovery, only a few plants, like …

Characteristics of leaching of heavy metals from low-sulfur

2021-3-11 · After continuous leaching by the mixed culture, the total sulfur, pyrite sulfur and sulfate sulfur in coal gangue decreased from 2.06% to 1.18%, 0.66% to 0.14% and 1.02% to 0.52%.

Excess sulfur and Fe elements drive changes in soil and

2020-6-26 · The excess sulfur and Fe elements and the acidified soil drove changes in soil and vegetation in the coal gangue areas. After 8 years of natural recovery, only a few plants, like Miscanthus floridulus, were able to live near the coal gangue in the area where the soil was still acidic and high in S and Fe.

(PDF) Excess sulfur and Fe elements drive changes in soil …

2020-6-26 · The results suggested that coal gangue significantly influences soil S, pH and plant species after 8 years of natural recovery. ... The CK-far plots contained relatively low soil sulfur content ...

the sulfur content of coal gangue

The sulfur content of the middling and gangue was within the range of 1–3%, which can be classified as medium and high-sulfur coal. The oxygen content was higher than that of the power coal used in China; hence, it was necessary to consider the experimental influence of the relative amount of C and O in the coal sample.

Experimental Study on Dynamic Mechanical Properties of

Compared with the seven indicators of coal gangue resource utilization (coal gangue type, rock type, fixed carbon content (FC ad), total sulfur content (S, d), Al 2 O 3 /SiO 2 ratio, Fe 2 O 3 content, and CaO + MgO content), the chemical composition of the coal gangue met the requirements for coarse and fine aggregates of cement concrete [3, 4 ...

Estimate of sulfur, arsenic, mercury, fluorine emissions due …

2016-2-1 · Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories ... Coal gangue is an important potential source of air pollution in China. ... We use cookies to help provide and enhance our service and tailor content and ads. By continuing you agree to the ...

Prediction of density and sulfur content level of high‑sulfur

2022-7-1 · The sulfur content of coal particles with bright spots is not necessarily higher than that of coal particles without bright spots, so coal particles cannot be directly estimated from the …