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This review highlights the significance of coal gangue classification according to its properties for the comprehensive utilization of gangue. ... Results showed that the treatment with 70-mesh high-sulfur coal gangue was most effective, and with ... it is important to detect sulfur content, toxic elements in the product, and harmful gas ...
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Pyrite in the gangue was considered as the waste causing harmful environmental problems. It is of great significance to enrich pyrite from high sulfur gangue.
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DOI: 10.1016/j.measurement.2022.111739 Corpus ID: 251529702; Detecting coal content in gangue via machine vision and genetic algorithm-backpropagation neural network @article{Zhang2022DetectingCC, title={Detecting coal content in gangue via machine vision and genetic algorithm-backpropagation neural network}, author={Chunlong Zhang and Dongyang …
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Based on the classification standard of GBT 29162-2012, the coal gangue used in this study was categorized as low-sulfur coal gangue (total sulfur [S t,d] <1 %). The content of heavy metals in the coal gangue was substantially lower than that in the Chinese agricultural soil control standard (GB15618-2018; Table 1), indicating that there was no ...
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The ecological restoration of coal gangue can be achieved by planting Cajanus cajan (pigeon pea) because of its developed root system. The close relationships soil microorganisms have with plants ...
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According to the changes of sulfur content at different temperatures in Table 3, it is found that the sulfur content of coal gangue is 3.95 %, and the sulfur content only remains 0.43 % after calcination at 500 °C for 15 min, indicating that about 89 % of sulfur at this temperature oxidized to form SOx during the fluidized calcination process ...
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Gangue, as a companion of mining [3,4], has the characteristics of low carbon content and hardness compared with coal. Gangue is mainly composed of SiO 2 and Al 2 O 3 [5], that contains not only a lot of sulfur (S), but also a lot of heavy metal elements. When coal is used as fossil fuel, if coal is doped with gangue, it will reduce the ...
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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 ...
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Machine vision has been widely used in various industrial fields, particularly in the field of parameter detection. Qiu et al. [1] used an image analysis method to estimate the ash content in clean coal and identified seven features according to the gray histogram of the coal image. Then, polynomial regression after feature selection (PRFS) and the support vector …
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The results showed that the accuracy of gangue and coal classification exceeded 95%. Ma et al. [4] ... Image features for density prediction can be used to predict sulfur content. • Different ...
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content in low-sulfur coal gangue is associated with greater, leaching of heavy metals; acidic conditions promote the release of heavy metals in low-sulfur coal gangue; and more precipitation is ...
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Coal gangue with a sulfur content of more than 2% is referred to as high-sulfur gangue (Wang et al., 2023a, Wang et al., 2023b). High-sulfur gangue is highly polluting because of its high concentration of iron sulfide minerals. With the increase in energy consumption, coal gangue has become a typical industrial solid waste worldwide.
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Category 4 classification 4.1 Classification according to total sulfur content Gangue at low total sulfur, medium, high, high divided into four categories, corresponding coded as 1,2,3,4. Category in Table 1. Its measurement Set method, see GB/T 214.
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nonmetallic (or industrial) mineral deposits (e.g., deposits of clay, mica, fluorite, asbestos, garnet, etc.), which contain minerals useful on account of their specific physical or chemical …
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contains high sulfur content but also contains a large number . of h eavy m etals (such as arsenic, cadmiu m, chromium, coppe r, ... classification of coal and gangue from multispectral images.
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Gangue and Tailings: Separating Value from Waste in Ore Processing. ... Ore deposits play a crucial role in the classification of mineral resources, emphasizing economic viability. ... arsenic, iron, lead, uranium, zinc, silicon, titanium, sulfur, nitrogen, platinum, and chromium, can have adverse health effects on organisms. Exposure may lead ...
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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 ...
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However, online detection of the coal content in gangue is currently unfeasible. A high coal content in gangue not only leads to a decline in the yields of clean coal but also reduces the economic benefits of an enterprise. Usually, coal content in gangue is measured by sampling and the float-sink test; this requires considerable time and effort.
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Gangue Minerals Yongjun Peng1 & Tarun Bhambhani2 # Society for Mining, Metallurgy & Exploration Inc. 2021 ... zation classification, triboelectrostatic belt separation and magnetic and density separation [5]. A critical review to out- ... as carbon dioxide and …
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Coal Type Heat Content (Btu/lb) Classification Bituminous >10,260 – 13,000 B Subbituminous > 7,500 – 10,260 S Lignite less than 7,500 L Table 7-3 Coal Grade SO 2 Content Ranges SO 2 ... on coal heat content, sulfur content, and geographic origin, which are used as a check against characteristics initially identified through the ICR.
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The sulfur content of coal gangue is within 1–3%, which is classified as medium‐high sulfur coal. Its output accounts for about 10%–20% of the raw coal output [3]. Generally, gangue with a calorific value higher than 1200 kcal is
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To capture differences in the sulfur and heat content of coal, a two letter "coal grade" nomenclature is used. The first letter indicates the "coal rank" (bituminous, subbituminous, or …
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The experimental results show that the GWO-SVM classification model has the highest accuracy, and the average classification accuracies were 96.49% and 94.82% of the training set and test set ...
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This paper provides comprehensive analyses of mineral microtextures, nanoparticulate electrum, defective crystal structures of key primary hydrothermal minerals - quartz and pyrite, the bulk sulfur isotopic composition of pyrite and marcasite, and fluid inclusions in hydrothermal quartz and calcite, all aimed at characterizing ore mineralization. The study …
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Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing in the …
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Elemental Sulphur Market Specifications. The largest single use of sulphur is for the production of sulphuric acid. Other uses are in the paper, rubber, and fertilizer industries. Ordinary lump sulphur should have a guaranteed sulphur content of 99.5 per cent and be practically free of arsenic, selenium, lead, copper, zinc, iron, and moisture.
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The invention discloses the anhydrous screening installation of gangue inorganic sulfur in a kind of X-ray clean coal.The invention is characterized in that, electric appliance interlocker able to programme that it includes being arranged on four different altitude heights, raw coal lump coal feed system, big grade straight-line oscillation screen system, gangue inorganic sulfur …
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pytorch,. Contribute to renqi1/Coal_Gangue_Classification development by creating an account on GitHub.
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metrics, respectively, thereby achieving an accurate classificationof coal and gangue. 1. INTRODUCTION Coal gangue, a solid waste commonly found in coal generation and …
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Coal gangue with a sulfur content >2 % (w/w) is commonly referred to as high-sulfur coal gangue and is a vital sulfur deposit in nature ... The classification of metabolites in the top 100 abundances in all samples is shown in Fig. 4 B and predominantly included amino acids, peptides, and analogues (19), arylsulfates (10), carbohydrates and ...
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