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LFC process is designed and developed by the United States. The coal is dried and retorted into semi coke by inert gas heat carrier in two steps in two rotary furnaces of drying and retorting. COED process was proposed by the United States in 1962. Pulverized coal is dry distilled into semi coke by hot gas in four continuous fluidized beds.
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In this study, co-metabolism with ethanol or sodium acetate as co-substrates was applied to improve the biological degradation of refractory dissolved organic matter (DOM) in …
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increase in the content of cheaper semi-soft coal results in savings of about USD 0.5 per ton of coal blend (average prices were assumed at USD 143.1 and USD 92.6/metric ton, respectively, for hard coking and semi-soft—according to [16]). Considering that coking plants, depending on the production capacity, annually process from several hundred
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The wastewater from coal carbonization was divided into two categories: the semi-coking wastewater produced from the middle- (700–800 °C) and low- (500–600 °C) temperature carbonization processes and the coking wastewater produced from the high-temperature carbonization process (950–1050 °C).The semi-coking and coking wastewater exhibit similar …
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a Continuous Coking Process in a Moving Bed, Sbornik. UKhINa, 1974, no. 3, pp. 164–168. 30. ... In connection with this, production of semi-coke is organized. Production of special coke and semi ...
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I will be giving my semi-annual Delayed Coking Process Technology seminar at the Hyatt Regency Houston Intercontinental Airport from February 25 to 27, 2025. To sign up, request registration ...
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Semi coke is the solid products, obtained from low-rank bituminous coal, lignite, or peat by car-bonization at low temperature (500–750 C) in a retort furnace. In general, semi coke is also a …
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The removal effects of main toxic organic pollutants in semi-coking wastewater by combined treatment process were investigated, while the genotoxicity relevance of wastewater from different treatment units were monitored by using Vicia faba bioassays. Results showed that 37 kinds of toxic organic pollutants were detected in the crude sewage, most of them were removed by …
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In the coking process, about 70% of sulfur in coal remains in coke, the rest volatilizes into the COG. Both inorganic sulfur and organic sulfur exist in coke. In the pyrolysis stage of coking, the sulfur in COG comes mainly from the aliphatic sulphide in coal. ... However, if in the coking stage the semi coke bed is fed with desulfurized COG ...
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The coking cycle is controlled such that the vacuum residue is continuously fed to the unit (because the vacuum column works around the clock) and the fluid products are recovered …
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retorted into semi coke. Coopers furnace process is developed in Germany. It can be a reheating continuous vertical carbonization furnace heated by lean gas or rich gas. It is an external heating ... boiler fuel, as well as lean agent for coking and coal blending, and raw material of briquette/coke. Semi Coke, Fig. 1 Semi coke transportation 2 ...
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process requires 1.37 t iron ore, 0.78 t coking coal, 0.1 t thermal coal, 0. 16 t PCI coal, 0.27 t limestone an d 0.125 t scrap steel. The BF-BOF p rocess accounts for about 9% of total global ...
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Coking is a process for thermally cracking large molecules in residual oil feeds from atmospheric or vacuum distillation columns into shorter-chain lower-boiling molecules, leaving behind the excess carbon in the form of petroleum coke. ... as a semi-continuous or semi-batch process. The drums operate on staggered 18–24 h cycles, during which ...
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Delayed coking is a semi-batch thermal cracking process. The process is comprised of coker heaters, coke drums, fractionation, vapor recovery unit, hydraulic decoking, coke handling and blowdown systems. Feed is normally …
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The microbial community consisting of Pseudomonas stutzeri N2 and Rhodococcus qingshengii FF could effectively and simultaneously remove phenols and petroleum hydrocarbons, and these two strains possess great potential of being applied in aerobic biological treatment process of large-scale semi-coking wastewater.
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In this study, spinel-type MnFe 2 O 4 magnetic nanoparticles were successfully synthesized employing the purified sol–gel method and used for the advanced treatment of biologically pretreated semi-coking wastewater (BPSCW) by the O 3 /H 2 O 2 catalytic system.
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Based on these understandings, it's feasible to treat semi-coking wastewater by 3D/EF process using CuFe 2 O 4 as het-erogeneous catalyst and AC as particle electrode. In this work, CuFe 2 O 4 was prepared and characterized. Then, factors such as voltage, pH, CuFe 2 O 4 dosage and AC dosage that eect on COD removal of semi-coking wastewater ...
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This study employs a combined phenolic condensation-persulfate advanced oxidation technology to treat high-concentration semi-coking wastewater, focusing on …
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It has properties that allow it to be used in coke moulding, semi-coking process. It is divided into the following technological groups: vitrinite and inertinite. Low-ash variant is used to get synthesized oil. Ж-rank (fat coal). It is one of the most valuable coking coal types. The coke from this type of coal has enhanced structural durability.
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The transformation of the carbon structure of coal during the coking process influences the coke microstructure and microtexture, and ultimately, the coke quality. ... Mechanism of carbon structure transformation in plastic layer and semi-coke during coking of Australian metallurgical coals. / Chen, Yixin; Lee, Soonho; Tahmasebi, Arash et al.
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Peer-review under responsibility of the Omsk State Technical University doi: 10.1016/j.proeng.2016.07.643 ScienceDirect Available online at International Conference on Oil and Gas Engineering, OGE-2016 Mathematical modeling of the carbon burn-out process from the shale semi-coke surface of aerofountain technological ...
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The process optimization experiment was carried out by adjusting the dilution multiples of semi-coking wastewater to 20, 50, 100, 200, 500 and 1000, respectively. It can be seen from Fig. 4 b that the removal rates of COD, NH 3 -N and VP continued to increase when diluted 20–200 times, and the removal rate decreased when diluted 200 ∼1000 ...
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Hard coking coals like anthracite have better coking properties than semi-soft coking coals, allowing them to garner a higher price. Australian HCC is regarded as the industry benchmark. While PCI coal is not often classified as coking coal, it still is used as a source of energy in the steelmaking process and can partially replace coke in some ...
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Five benzenes, 11 phenols, and five polycyclic aromatic hydrocarbons (PAHs) were investigated as the dominant contaminants in semi-coking wastewater. Because of residual extractant, the phenols extraction process increased acute toxicity to V. fischeri and immobilization and lethal toxicity to D. magna.
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Coking is a process for thermally cracking large molecules in residual oils into lower-boiling molecules, leaving behind the excess carbon in the form of petroleum coke—a …
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Materials. The carbon source was semi-coking wastewater acquired from Yulin, Shaanxi, China. The content of phenols in semi-coking wastewater was determined by (National Standard, 2014), and the content was about 3,000 mg L −1 (Wang et al., 2020).The chemicals, including, formaldehyde, ethanol, acetone, potassium hydroxide, and hydrochloric acid, were purchased …
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This review examines the technological bottlenecks, potential solutions, and future development directions in the treatment and resource utilization of semi-coking wastewater …
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THE METHOD OF MANAGING THE PROCESS OF SEMI-COXING SLASS1A IN A GAS-GENERATOR by adjusting the magnitude of the vacuum by changing the flow rate of the return gas, the temperature in the gas discharge by changing the flow rate of air, the ratio of the flow rate of the return gas and air by changing the flow rate of air, which is different in that, in order to …
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This work was supported by the Scholarship of the President of the Russian Federation for young scientists and postgraduates, project SP-1275.2021.1 "Establishment of physico-chemical regularities, chemistry and mechanism of the process of semi-coking of low-grade solid fuels (oil shale and brown coal)".
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