Quality and Process Performance of Rotary Kilns and Shaft …
The comparison between vertical shaft furnace and rotary kiln for petroleum coke calcination. S. Yi Xu Haifei Wang Yubin Cui Yinhe Liu Chaodong. Chemistry, Materials Science. 2010; At present,the petroleum coke is mainly calcined by vertical shaft furnace or rotary kiln to meet the requirement of prebaked anode used for aluminium reduction in ...Web
اقرأ أكثرThe New Generation of Vertical Shaft Calciner Technology
GPC *-- green petroleum coke Rotary kiln calciners are widely used for CPC production in the world, while the vertical shaft calciners are used in most Chinese CPC plants. Vertical calciners are stationary calcining furnaces. The technical and economical comparisons between the rotary calcining and the old vertical shaft calcining technologies areWeb
اقرأ أكثرThe comparison between vertical shaft furnace and rotary kiln for
Abstract. At present, the petroleum coke is mainly calcined by vertical shaft furnace or rotary kiln to meet the requirement of prebaked anode used for Aluminum reduction in China. Vertical shaft ...Web
اقرأ أكثرQuality and Process Performance of Rotary Kilns and Shaft …
Abstract. Rotary kilns have been used successfully for many years to produce calcined coke for the aluminium industry and they offer a high level of automation, performance and …Web
اقرأ أكثرEnergy optimisation of vertical shaft kiln operation in the process …
The essential part of the refractory materials production on a basis of sintered dolomite as raw material is the process of dolomite calcination. The technology process usually takes place in shaft or rotary kilns, where the dolomite stone, CaMg(CO3)2, is subjected to a high temperature heat treatment. The calcination of the dolomite is highly endothermic …Web
اقرأ أكثرNEW GENERATION OF VERTICAL SHAFT CALCINER …
Rotary kiln calciners are widely used for CPC production in the world, while the vertical shaft calciners are used in most Chinese CPC plants. Vertical calciners are stationary …Web
اقرأ أكثر(PDF) The History and Future Challenges of Calcined Petroleum Coke
SEM images of shaft (a) and rotary kiln CPC (b). ... Petroleum coke as a low-cost by-product was ever used as the conductive filler in cementitious composites, while its mechanical properties were ...Web
اقرأ أكثرUse of Alternative Fuels in Cement Manufacture: Analysis of …
under gravity. Parallel evolution of shaft kiln technology with the more complex dry process rotary kilns kept the mix of pyroprocessing technologies in China's cement industry more diverse than in almost any other country. Coal is the primary fuel burned in cement kilns, but petroleum coke, natural gas, and oil are also consumed.Web
اقرأ أكثرUse of Thermally Desulfurized Shaft CPC for Anode …
Table 1 shows the results of a TDS trial in a rotary kiln with green petroleum coke (GPC) containing 4.6% S. The S loss under normal calcining conditions is 9–14% and it is ... The differences between rotary kiln and shaft calciners have been described previously [7]. Rain Carbon operated a small 20 kt/yr shaft calciner in China from 2009 ...Web
اقرأ أكثرMethod for calcining delayed coke (Patent) | OSTI.GOV
Abstract. Delayed petroleum coke is calcined in an internally-fired vertical shaft kiln. A downwardly-moving bed of green coke is preheated in the top of the kiln by rising combustion gases, then heat soaked at calcining temperatures in the intermediate section of the kiln, and finally cooled by recycle gas moving upwardly from the lower part of the kiln.Web
اقرأ أكثرQuality and Process Performance of Rotary Kilns and Shaft …
Calcined coke is the best material for making carbon anodes for smelting of alumina to aluminum. Petroleum coke is usually calcined in a gas-fired rotary kiln or rotary hearth at high temperatures ...Web
اقرأ أكثرCombustion of petroleum coke dust as a partial substitute for …
Delayed petroleum coke is calcined in an internally-fired vertical shaft kiln. A downwardly-moving bed of green coke is preheated in the top of the kiln by rising combustion gases, then heat soaked at calcining temperatures in the intermediate section of the kiln, and finally cooled by recycle gas moving upwardly from the lower part of the kiln.Web
اقرأ أكثرIndia Calcined petroleum coke production line by Vertical Shaft Kiln
India Advantages and disadvantages of Vertical Shaft Lime Kiln. India · Abstract. The calcination principle of composite firing shaft kiln is: mix the solid fuel (coke or anthracite) with qualified stone evenly, use rotary discharging device equipped on kiln roof to discharge the mixture into the kiln, then under its own gravity the mixture …Web
اقرأ أكثرModeling and simulation of petroleum coke calcination in rotary …
Martins et al. (2001) described a steady-state rotary kiln model for the petroleum coke calcination that predicts the temperature profiles for the bed, gas phase and the kiln wall in the axial ...Web
اقرأ أكثرCalcined Kiln Analysis and Proximate Simulation of High-Quality Coke
Grain stability and yield in both wet and dry Shaft Kiln Technology forms are superior to shaft kilns. The petroleum coke is calcined at the top of the The temperature achieved during the manufacture of vertical shaft kiln which is injected with air, and the CPC is quite high for the shaft kiln at 1350°C, but the steam is injected into the ...Web
اقرأ أكثرCoke Consumption
Rotary Kiln Petroleum Coke Calcination Process. A. A Boateng, in Rotary Kilns (Second Edition), 2016. ... or shaft kiln described in the early chapters. However, the rotary kiln has become the industrial workhorse for this purpose due to its flexibility of accepting a wide range of green coke as feedstock, large production capacity, low dust ...Web
اقرأ أكثرPelletization and calcination of green coke
A method of calcining green petroleum coke which includes separating the green coke having a particle size of between 0.1 mm and 50 mm into undersized and oversized fractions, pelletizing the undersized fraction with a binder to form pelletized coke, combining the oversized fraction and the pelletized coke to form a feed mixture, and …Web
اقرأ أكثرSEM images of shaft (a) and rotary kiln CPC (b).
Download scientific diagram | SEM images of shaft (a) and rotary kiln CPC (b). from publication: The History and Future Challenges of Calcined Petroleum Coke Production …Web
اقرأ أكثرSchematic presentation of vertical shaft kiln; (a) preheating zone, …
This approach has been found on single shaft using natural gas [13,14] or heavy oil as fuel [15], ASK with natural gas as fuel [16,17], and mixed-feed shaft kilns with coke [18,19]. ...Web
اقرأ أكثرDevelopment Status and Suggestions of Refractory Materials
The calcination equipment for petroleum coke or needle coke calcination is usually rotary kiln and vertical shaft kiln . Increasing the service life of refractories in calcination facility is the key to increase the utilization rate of calcination equipment, to reduce maintenance cost and even to improve the calcination quality, especially when …Web
اقرأ أكثرA SYNERGY MODEL OF MATERIAL AND ENERGY FLOW …
by the drying kiln, dried green petroleum coke is then undergone the calcination process in the rotary kiln. Afterwards, it is then cooled to a temperature below 80oC by the cooler. Meanwhile, the flue gas from rotary kiln, consisting of un-burnt particulates and volatile matter, is further processed in the incinerator for complete combustion.Web
اقرأ أكثرA Real-Time Mathematical Model for the Two-Dimensional
Compared with studies on a rotary kiln, fewer studies have been conducted on numerical simulations of petroleum coke calcination in a vertical shaft calciner. Zhang et al. 9 – 11 studied the gas combustion in the flue and the temperature and pressure distribution in the pot via the computational fluid dynamics (CFD) numerical simulation …Web
اقرأ أكثرUS4251323A
Delayed petroleum coke is calcined in an internally-fired vertical shaft kiln. A downwardly-moving bed of green coke is preheated in the top of the kiln by rising combustion gases, then heat soaked at calcining temperatures in the intermediate section of the kiln, and finally cooled by recycle gas moving upwardly from the lower part of the kiln.Web
اقرأ أكثرProduction and Application of Calcined Coke In Rotary
the shafts. In a rotary kiln, the coke is tumbled to improve heat transfer and consistency of calcination and this reduces the ... Petroleum coke is a by-product from crude oil refineries, but ...Web
اقرأ أكثرRotary Hearth Calcining of Petroleum Cokes | SpringerLink
Common calcining methods utilize a rotary kiln, a shaft furnace, or a rotary hearth furnace. Each furnace type uses a different method for heating the coke up to the calcining temperature which typically ranges from 1150° to 1400 °C. This paper will concentrate on the rotary hearth furnace and its use for petroleum coke calcining .Web
اقرأ أكثرRotary Hearth Calcining of Petroleum Cokes | SpringerLink
Common calcining methods utilize a rotary kiln, a shaft furnace, or a rotary hearth furnace. Each furnace type uses a different method for heating the coke up to the calcining …Web
اقرأ أكثرPetroleum Coke Types, Uses and Specifications
There are two main types of petroleum coke: green coke and calcined coke. 1. Green Coke. Green coke is the raw material used to produce calcined coke. It is the solid carbon byproduct of the oil refining process. Green coke has a high moisture and volatile matter content. 2.Web
اقرأ أكثرEvaluation and analysis of exergoeconomic performance for the
CALCINATION PROCESS OF GREEN PETROLEUM COKE IN VERTICAL SHAFT KILN . Peng LI a, b, c, Baokuan LI a, b *, Zhongqiu LIU a, Wenjie RONG a. a School of Metallurgy, Northeastern University, Shenyang ...Web
اقرأ أكثرQuality and Process Performance of Rotary Kilns and Shaft …
for a shaft calciner is 85-88%. • The coke residence time is much shorter in a rotary kiln than a shaft calciner (~50 minutes vs 28-36 hours). This translates to a significantly higher heat-up rate for green coke in a rotary kiln (~50-100°C/min versus ~l-2°C/min in a shaft calciner). Impact of Differences on Calcined Coke QualityWeb
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