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The coke combustion process in iron ore sintering is dependent on the coke size.Therefore pilot-scale sintering tests with blends containing different coke size distributions were carried out to investigate the effect of coke size(the ore blend contained 10% MAC marra mamba fines).It was found that increasing the coke mean size by reducing the …
A coke particle size detection model with the mean average prediction accuracy of 88% has been developed using YOLOv3. By testing 20 images, the average …
After preheating, the N released by semi-coke was mainly converted into N 2 and NH 3. • Different particle size could affect the content of each component in the coal gas. • The highest η was 98.23% when d 50 was 163.84 µm with the brightest flame image. • NO x would decrease when fuel particle size was lower/higher than the critical ...
The coke samples produced from the coal samples of different particle sizes were labeled as S-ZD, M-ZD, and L-ZD (particle size ranges: 74–100, 100–250, and 250–500 μm, respectively). The macroscopic images of the coal samples and the corresponding particle sizes of the coke samples are shown in Fig. 2 .
Pt/Al2O3 catalysts with Pt particle sizes of 2.0, 4.6 and 12.1 nm were prepared by the ethylene reduction method and used to study the effect of Pt particle size on coking rate and nature of coke ...
1.1 This test method details a procedure for performing particle size distribution analysis by dry sieve testing on green petroleum coke with a topsize of no more than 75 mm and …
The average Pt particle size in Pt-SBA-15-IMP, determined from the full width half-maximum (FWHM) ... The most significant effect of the Pt particle size is on the coke formation during the reaction. The initial rate of coking is an order of magnitude higher on Pt-SBA-15-DP than that on Pt-SBA-15-IMP and the initial selectivity to coke on the ...
The value of -3+1 mm. represents the most favourable particle size for coke breeze in the sintering process. About 20% of total coke fines (-0.5 mm) are produced during different steps of ...
Using a finer coke particle size for sample preparation leads to large pores loss. • Compared to circular, elongated pores are more likely to be lost during crushing. • …
However, a comparison of coke particle size ranges of 2.8–4.7 mm and 15–16 mm indicated that a particle size in a range of 2.8–4.7 mm can be employed without compromising pore structural characteristics, yet still enabling representative sampling.
From the perspective of coke particle size composition, the proportion of coke particle size greater than 60 mm after first screening was 45.45%, and the …
The ball size of 2.54 cm shows slight changes in particle median diameter over time, while 3.0 cm ball size requires more grinding time to reduce metallurgical coke particles. View Show abstract
Petroleum coke, often simply referred to as "petcoke," is a carbon-rich byproduct of the oil refining process that has found its way into various sectors, playing a crucial role in energy generation, manufacturing, and more. ... Particle Size Distribution: The particle size distribution of petcoke can influence its handling, storage, and ...
The results show that the coke particle size degradation reaches 85.36 % in the 0–5 m zone at the tuyere level. The proportion of coke size less than 3 mm increases sharply along the tuyere direction, and a new method of calculating the depth of the tuyere raceway zone is proposed for the first time.
The coke particle size and its distribution are important parameters to ensure the blast furnace permeability and the stability at tuyere raceway [1,2,3]. In coking production process, quenched coke was sent to screening system. The screening method difference is also one of the key affecting factors. Coke is a kind of porous carbon material.
Figure Figure9 9 shows histograms of the coke particle size distribution. Red color corresponds to the highest concentration and blue to the lowest. Coke is collected in a tray with a diameter equal to the accumulation chamber diameter—5270 mm. Open in a separate window.
As can be seen from Table 2, the average particle size of the anthracite was 1.97 mm, which is a little larger than that of the coke breeze. Table 3 shows the results of the proximate analysis of ...
The effect of particle size distribution of petroleum coke on the properties of petroleum coke–oil slurry (PCOS) from four Chinese petroleum coke samples, such as …
However, Karabasov et al. [9] have reported that the combustion rate of 1-2 mm coke particles was the highest, and Mikhalevich et al. [10] reported it as 1.6-2.5 mm coke particles.
When a block is manufactured using coke at a particle size of 2–5 μm and an anode material is created with a particle size of 10–15 μm, voids capable of storing lithium ions between the coke ...
Obtain the particle size distribution for the appropriate category from Table B.2-2. Apply the particle size distribution to the uncontrolled particulate emissions. Instructions for …
The size and morphology of petroleum coke particle with different grinding time and the corresponding stabilizing mechanisms were analyzed by SEM and zeta potential measurements. Experiments proved the petroleum coke grinding time of 60 min is suitable for the particle distribution and stability of PCOS. Besides, the effect of the …
For the sintering of a coarse hematite iron ore, it was found that the optimum mean particle size combination of coke breeze and limestone was 1.71mm and 1.55mm in the sinter mix.
The particle size distribution of heated coke samples after treatment in the I-type drum is shown in Fig. 3. It can be clearly seen that the amount of coke whose particle size is located in 0.074–0.5, 0.5–1, and 1–5 mm increase with the increase of temperature, while the amount of coke whose particle size is located in 10–15 mm decreases.
Average particle diameters (mm) of the four types of coke before and after pulverization. Source publication. Method for Simulating Gas Permeability of a Coke Bed Including Fines Based on 3D...
The same coke particle size as presented in Table 1 was used to prepare these samples. The desired amount of pitch was added to the dry aggregate and then mixed and pressed using the same ...
coke particle size. In this study, the sieving PSD and images of the metallurgical coke sampled from the main conveyor belt of a blast furnace were acquired. An efficient coke particle detection model was developed based on the object detection algorithm YOLOv3 [31]. On the basis of the particle sizes detected by this model, an effective method ...
The viscosity of pitch-dust compositions containing 30 and 50% of the coke dust with a particle size of −0.124 mm is measured in a temperature range of 480–750 K. It is found that the ...
The piecewise function of coke particle size and temperature was obtained by fitting the particle size curve as shown in Fig. 2 (b), and the function was a compiled using the open-source software package MFIX and imported into the CFD-DEM model (Wang et al., 2020). The initial temperature of the particles was set at 1003 K to promptly reach the ...
A decrease in coke particle size leads to an increase in the concentration of pores that are equal to 200 μm 2 and below. In contrast, a decrease in coke particle size results in a decrease in population of pores of areas equal to 1000 μm 2 and above. The observed distribution suggests that the concentration of larger pores decreases with a ...
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