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Najmaddaini, Hosein, Maleki Moghaddam, Mostafa, Zare, Saeid, Rezaei, Masoud, Motamedineya, Mohammad Ali, Biniaz, Gholamreza. (1404). Designing SAG Mill Liners for Improving Performance and Life Time at the Sarcheshmeh Copper Complex. , 16(6), 1957-1967. doi: 10.22044/jme.2025.15311.2937
Hosein Najmaddaini; Mostafa Maleki Moghaddam; Saeid Zare; Masoud Rezaei; Mohammad Ali Motamedineya; Gholamreza Biniaz. "Designing SAG Mill Liners for Improving Performance and Life Time at the Sarcheshmeh Copper Complex". , 16, 6, 1404, 1957-1967. doi: 10.22044/jme.2025.15311.2937
Najmaddaini, Hosein, Maleki Moghaddam, Mostafa, Zare, Saeid, Rezaei, Masoud, Motamedineya, Mohammad Ali, Biniaz, Gholamreza. (1404). 'Designing SAG Mill Liners for Improving Performance and Life Time at the Sarcheshmeh Copper Complex', , 16(6), pp. 1957-1967. doi: 10.22044/jme.2025.15311.2937
Najmaddaini, Hosein, Maleki Moghaddam, Mostafa, Zare, Saeid, Rezaei, Masoud, Motamedineya, Mohammad Ali, Biniaz, Gholamreza. Designing SAG Mill Liners for Improving Performance and Life Time at the Sarcheshmeh Copper Complex. , 1404; 16(6): 1957-1967. doi: 10.22044/jme.2025.15311.2937

Designing SAG Mill Liners for Improving Performance and Life Time at the Sarcheshmeh Copper Complex

Journal of Mining and Environment
مقاله 7، دوره 16، شماره 6، آذر و دی 2025، صفحه 1957-1967    اصل مقاله (13.67 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22044/jme.2025.15311.2937
نویسندگان
Hosein Najmaddaini1؛ Mostafa Maleki Moghaddam* 1؛ Saeid Zare2؛ Masoud Rezaei2؛ Mohammad Ali Motamedineya1؛ Gholamreza Biniaz3
1Mineral Processing Group, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
2Shahid Bahonar University of Kerman, Kerman, Iran
3Sarcheshmeh Copper Complex, Rafsanjan, Iran
چکیده
Abstract
The structural characteristics of mill liners, such as lifter shape and mill speed, significantly influence the grinding process. At the Sarcheshmeh slag flotation plant, the 6×6 meters SAG mill was initially equipped with 48 rows of liners, designed in a Hi-Lo configuration for the first half and a Lo-Lo configuration for the second. Throughout the mill shell liner's 1700-hour operational period, monitoring identified 30 failures. Investigations revealed that defects in the liner design and improper charge motion were the main causes. This study proposes modifications and standardization of the shell liner design, tailored to the specific circuit conditions, to enhance performance and reliability. The redesign included several key changes: 1) Reducing the number of rows: The number of liner rows was decreased from 48 to 32. 2) Adjusting lifter angle: The lifter angle was increased from 23 to 30o to optimize performance. 3) Eliminating Hi-Lo design liners: The Hi-Lo design liners were changed to Hi-Hi, and 4) Reducing liner variety: The variety of liners was streamlined from 5 types to 2. The installation of the proposed liners optimized the charge trajectory for grinding, resulting in higher liner's lifetime. It extended the liner life by 30% and eliminated liner failures, reducing them from 30 to zero. The wear rate for the proposed design was 0.05 mm/hour, while the original design had a wear rate of 0.11 mm/hour. This difference corresponds to a factor of 2.3 times improvement.
کلیدواژه‌ها
SAG mill؛ Liner؛ Charge trajectory؛ Sarcheshmeh copper complex
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