Document Type : Research Article
Authors
1
Safaeieh, Daneshgah Boulevard, Yazd University,
2
Department of Mining, Faculty of Mining Engineering and Metallurgy, Yazd University
3
Gole gohar
4
gole-gohar
10.22034/anm.2024.20840.1613
Abstract
Modeling and simulation play a crucial role in designing, developing, and optimizing processing circuits, enabling accurate prediction of their behavior and performance. Lines 5, 6, and 7 of the Golgohar plant are similar, each receiving feed from the No. 3 Gogohar mine. The high concentration of fine particles in the feed to these lines significantly increases the importance of proper hydrocyclone positioning. This research aims to find the best layout for the ball mill, medium intensity magnetic separators, and hydrocyclones. Two placement options for the hydrocyclone were evaluated: at the beginning or the end of the grinding circuit. USIM PAC software was used to simulate how the hydrocyclone's placement affected the milling circuit's performance. The initial step involved defining the key simulation parameters, such as the breakage function, selection function, residence time, and the geometric features of the equipment used. Both the existing circuit (Ballmill-Magnetic Separators-Hydrocyclones) and the proposed alternative (Hydrocyclones-Ballmill-Magnetic Separators) were simulated. The analysis suggests that the existing circuit requires three hydrocyclones operating at 112 kilopascals. Optimal diameters are 260 mm for the inlet, 160 mm for the overflow, and 130 mm for the underflow. The feed, overflow, and underflow particle sizes (d80) are 52, 243, 102, and 321.86 microns, respectively. The proposed circuit incorporates three hydrocyclones, each operating at 134 kilopascals. These hydrocyclones have inlet, overflow, and underflow diameters of 225 mm, 297 mm, and 82.5 mm, respectively. The particle size (d80) of the feed, overflow, and bottom products was measured as 574.25, 104, and 1229.01 microns, respectively. The proposed grinding circuit's input feed saw a 21.69% reduction in tonnage, while particle size increased by 159.03%. The circulating load tonnage, particle size, and outflow particle size from the ball mill decreased by 37.71%, 4.43%, and 8%, respectively. The proposed circuit boosts capacity and the size reduction ratio of the ball mill by 21.69% and 172.98% respectively. These results, confirmed that the proposed circuit has a higher efficiency than the existing one.
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