Comparison of grinding characteristics in high-pressure grinding roller (HPGR) and cone crusher (CC)

• Autorzy: Liu L. , Tan Q. , Liu L. , Li W. , Lv L.

Identyfikatory

DOI

10.5277/ppmp170226

• Języki publikacji: EN

Abstrakty

EN

We comparatively studied the ball mill grinding characteristics of comminuted hematite products using a high-pressure grinding roll (HPGR) and a conventional cone crusher (CC). The major properties, including grinding kinetics and technical efficiency (Et), were investigated. The parameters in m-th order grinding kinetics were analyzed, and grinding specific rates were visualized. Ore particles experienced three inherent stages in ball grinding mills, that is i) rapid grinding of coarse fraction, ii) dynamic grinding of medium size fraction, and iii) single grinding of medium size fraction. Particles with size -0.043+0.031 mm were used into dynamic grinding stage earlier than particles -0.105+0.043 mm, and then over-grinding of fines occurred easily. Compared with CC products, HPGR products had significantly shorter turning time points in three breakage stages, implying that HPGR products were ground faster with earlier occurrence of fines over-grinding. HPGR products gave lower Et at a decreasing rate than the CC products for -2.0 mm and -0.5 mm feeds. Then, it showed a slightly higher value of Et for -2.0+0.5 mm feed. This indicated that fines over-grinding in HPGR full-size products were more serious under the condition of coarse grinding, whereas the efficiency was higher, and over-grinding weakened significantly in HPGR coarse products because of screening-out fines.

Słowa kluczowe

EN

HPGR; grinding kinetics; grinding technical efficiency; ultra-crushing; classified grinding

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2017
• Tom: Vol. 53, iss. 2
• Strony: 1009--1022
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Liu L.

• Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CGS, Zhengzhou 450006, China
• Key Laboratory for Polymetallic Ores' Evaluation and Utilization，MLR, Zhengzhou 450006, China
• China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

autor

Tan Q.

• Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CGS, Zhengzhou 450006, China
• Key Laboratory for Polymetallic Ores' Evaluation and Utilization，MLR, Zhengzhou 450006, China
• China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

autor

Liu L.

• Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CGS, Zhengzhou 450006, China
• Key Laboratory for Polymetallic Ores' Evaluation and Utilization，MLR, Zhengzhou 450006, China

autor

Li W.

• Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CGS, Zhengzhou 450006, China
• Key Laboratory for Polymetallic Ores' Evaluation and Utilization，MLR, Zhengzhou 450006, China
• China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

autor

Lv L.

• Zhengzhou Institute of Multipurpose Utilization of Mineral Resources CGS, Zhengzhou 450006, China
• Key Laboratory for Polymetallic Ores' Evaluation and Utilization，MLR, Zhengzhou 450006, China
• China National Engineering Research Center for Utilization of Industrial Minerals, Zhengzhou 450006, China

Bibliografia

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