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2. Green coke feeding system There are many more calcination units and feeding entrances for the new generation shaft calciners. An automatic green coke distribution facility has been developed and installed above the calciner for more homogeneous feeding and less manual operation. Every unit is fed with an equal amount of green coke
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35 rowsCoke-calcining plants receive green petroleum coke from oil refineries. The …
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Petroleum coke calcining is thermal treatment of green petroleum coke (GPC) above 1200 C. to benefit the material by removing moisture, volatile matter and other green coke impurities, while increasing density and decreasing electrical resistivity. Calcined petroleum coke is mainly used to produce anodes used in the aluminum industry, steel ...
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Calcined petroleum coke is obtained by calcining petroleum coke at high temperatures under the condition of 1250 • C to 1350 • C. Because of its low cost, high carbon content, and easy ...
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A three-dimensional steady-state mathematical model of a rotary calcining kiln for the petroleum coke is presented. The model takes into account all the physical phenomena of interest, from gas flow, heat transfer, volatile matter and coke dust evolution and combustion, to the granular bed motion and the thermal effects of the refractories. …
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Modern shaft calciners have automated systems for feed, discharge, and even waste heat recovery. Shaft calcined coke often exhibits a higher bulk density but can lead to challenges in silo ...
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Calcining coke involves heating the material to remove moisture and volatiles which increases the coke density and electrical conductivity. Many coke calcining plants are located next door to oil refineries for easy and constant access to petroleum coke. ... The settling chamber and stack are upstream from the green coke feed. The stack in many ...
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Keywords: Rotary Kiln, Calcining Processes, Rate-based HYSYS Simulation. Abstract: This paper presents the simulation of the green petroleum coke calcining processes using the simulation program ASPEN HYSYS. The results are validated using actual industrial data. The present study provides a detailed description of the rate-based simulation.
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The challenge is to reach a high calcining temperature with a low heating rate without unduly lengthening the kiln. 90 REDUCTION AND CASTING OF ALUMINUM Green coke feed Zone 1 Green under-calcined coke Calcined coke to cooler Fig. 3. Schematic presentation of coke calcining kiln fitted with shell mounted fan. Fuel-less …
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Table 1. Typical sponge coke specifications Item Green coke Calcined coke Table 2. Typical needle coke specifications Item Green coke Calcined coke Volatile Matter Volatile Matter Bulk Density Bulk Density Real Density …
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Kinetic analysis of the green petroleum coke calcining processes using the simulation program HYSYS and actual industrial data is presented. ... the whole calcination system is determined as 0.507 ...
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Carbon electrodes used in the aluminum industry are made from green petroleum coke, which should be calcined to remove moisture and volatile matter, and to acquire an appropriate crystalline structure. This process is carried out in a calcining rotary kiln. A typical kiln for petroleum coke is about 60 m long with a diameter of 2.5 m.
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More particularly, the present invention relates to an improved feeding system for feeding green coke into a coke calcining apparatus. Processes for calcining green coke to produce calcined coke are well-known. Green coke is a carbonaceous material containing various solid hydrocarbons and is derived from various petroleum hydrocarbon fractions.
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offers the process, equipment and system design capability and experience to supply complete calcining systems, from feed to discharge, chute to stack. Our mineral thermal processing know-how and ability to develop, design, program and commission complete control systems ensures the most efficient and productive operation of …
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The objective of this study is to simulate the green petroleum coke calcining processes using the simulation program HYSYS and using actual industrial data. Because counter-current mass flow is not … Expand. 5. 2 Excerpts; Save. Simulation of rotary cement kilns using a one-dimensional model.
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of kinetics-based simulation described in this study may be used to predict coke calcining kilns performance regardless of the green coke composition. Keywords: Rotary Kiln, Calcining Processes, Kinetics, Simulation. 1 Introduction Calcined petroleum coke (CPC) suitable for aluminum industry anodes calls for a high quality standard.
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The thermal diffusivity of petroleum coke decreased during the calcining process. With increasing temperature, coefficient of heat conductivity and specific volume heat of the petroleum coke increased with a decreasing variation rate. The research provides a database for the calcining graphitization process of petroleum coke.
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prior to introduction into the rotary kiln for calcining. The schematic of the kiln is shown in Figure 1 and the calcining flow chart in Figure 2. The rotation and the slope (generally about 4 %) of the kiln facilitate the movement of the …
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Petroleum coke consists of two substances: green coke and calcined coke. The principal difference between the substances is the amount of residual hydrocarbon in the two products. Petroleum coke (both green and calcined) is produced by the high-pressure thermal decomposition of heavy (high-boiling) petroleum process streams and residues.
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It is found that the rate-based simulation can be implemented as a useful tool to predict the operating conditions needed to control the content of undesirable impurities in the calcined petroleum coke, namely, sulfur, volatile matter and moisture contents. This paper presents the simulation of the green petroleum coke calcining processes using the simulation …
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• An advanced CHP system for petroleum coke calcination in an electrothermal fluidized bed was developed and theoreti-cally evaluated. • The conducted research and …
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This has dramatically changed the availability of high quality green coke in the traditional markets, particularly in the United States. In the late 1990's, Aminco strategically positioned itself in China where low sulfur and low metal green petroleum coke is available and suitable for calcining and carbon anode manufacturing.
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a wide range of green coke feeds including needle, shot, fluid or tar pitch cokes. The rotary kiln is also able to ... Coke calcining systems Table 2. Typical needle coke …
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Annual mass of petroleum coke dust removed from the process through the dust collection system of the coke calcining unit (metric tons/year) and whether coke dust is recycled to the unit (e.g., all dust is ... Monthly mass of green coke fed to the coke calcining unit (metric tons/year). Monthly mass of marketable petroleum coke produced by the ...
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A new calcining technology has been developed to lower the thermal expansion coefficient considerably less than the traditional methods at the calcining stage of green coke. The results obtained ...
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The objective of this study is to simulate the green petroleum coke calcining processes using the simulation program HYSYS and using actual industrial data. Because counter-current mass flow is not allowed in the HYSYS program, the kiln was described by using fictive streams and unit operations. By the simulation, it is possible to predict the …
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Coke calcination is a process that involves the heating of green petroleum coke in order to remove volatile material and purify the coke for further processing. Calcined coke is vital to the aluminum industry, where it is used to produce carbon anodes for aluminum production. Calcined coke is also widely used as
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The vibrated bulk density (VBD) is one of the most important calcined coke properties. In the context of changing green coke quality, a reliable forecast of the calcined coke VBD from small samples of green coke is required. ... such as the formation of coke rings. The methods will therefore be used in the future to support RTA's calcining ...
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API, 2008; USEPA, 2011Petroleum coke consists of two substances: green. coke and calcined coke. The principal difference between the substances is the amount of …
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DOI: 10.1016/j.jaap.2024.106378 Corpus ID: 267325390; Structure and calcination characteristics of green coke in different parts of the delayed coking tower @article{Gao2024StructureAC, title={Structure and calcination characteristics of green coke in different parts of the delayed coking tower}, author={Long Gao and Yiting Zhao …
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