• Cement
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• s.64
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• pp.11-16
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• 1976

암석 파쇄시 최대의 효과를 얻기 위해서는 암석의 물리적, 화학적 특성 및 size 등을 고려하여 최적의 crusher를 선택해야 함을 감안하여 crusher의 일종인 impact crusher의 구조 및 파쇄원리, 파쇄효과, 경제성 검토결과 등을 수록, crusher의 선택 및 광산 운영에 참고케 하고자 한다.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2004.04a
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• pp.215-218
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• 2004

This paper is about a study of development on multi crusher system. This system use the principle of the Yeon-Ja-Bang-A. This system consists of the power part and the power transmit part, the Yeon-Ja Stone part, the crusher part, an input part, an output part. The advantage of this system decrease about working hours and installation aera.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2006.11a
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• pp.83-86
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• 2006

This study investigates engineering properties of concrete using recycled coarse aggregated manufactured by bar-crusher. Test showed that Bar-crusher(S) had more effective results at fresh state than cone-crusher(C) and impact-crusher(I). In case of specimens manufactured by S, increase of spindle velocity, incorporating ratio of recycled aggregate and maximum size of aggregate inclined fluidity. As for the hardened concrete, compressive strength of specimens by C or I exhibited lower value than that of S. In addition, specimens using recycled aggregate manufactured by 400rpm and 500rpm of spindle velocity showed less than 10% reduction rate of strength, which is not significant reducing value. It is found that 500rpm of the spindle velocity had the best strength performance, while 600rpm was the worst. Strength value of specimens decreased as incorporating ratio of recycled aggregate inclined, but the strength value of most specimens exhibited less than 10% of reducing rate, assuming favorable result, only at less than 25% incorporating ratio of recycled aggregate.

• Journal of the Mineralogical Society of Korea
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• v.23 no.4
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• pp.297-303
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• 2010

We report the particle-size distribution and comminution charactersitics of dolomite depending upon crushing equipment (hammer crusher and roll crusher) and crushing circuit (open and closed). The quantity of fine particles (< 100 mesh) produced by hammer crusher was 34 wt.% which is about three times that by roll crusher. The quantity of 14~25 mesh size fraction by roll crusher was 20 wt.% higher than that produced by hammer crusher. 80 wt.% of the crushing products by hammer crushing was under 35 mesh in size, while the particles produced by roll crushing were relatively coarse. The particle size of both the hammer and roll crushers decreased by employing closed crusing circuit in comparison to open circuit. Products of required particle-size were obtained effectively depending on appropriate crushing equipment and crushing circuit.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.431-432
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• 2007

• Biomedical Science Letters
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• v.8 no.2
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• pp.101-106
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• 2002

The purpose of this study was to test the capacity of automatic tablet crusher. The Automatic tablet crusher not only saved crushing time, but also removed floating fine powders that was occurred during crushing and caused allergy. The characteristics of powder produced by this crusher were as follows: First, to meet the condition as powder after pulverizing 5∼10 g tablet it took 6 to 12 seconds crushing time. But six seconds would do to get powder f3r oral administration. Second, when the quantity of medicine was measured by HPLC, powder from automatic crusher showed higher than that from pestle. HPLC chromatogram indicated that there was no change of medicine in the process of pulverization.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2008.05a
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• pp.469-472
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• 2008

This research suggest one-body type scrapped styrofoam crusher with sprayed air (or water), which at present separately composed of dust eliminator, air supplier and crusher. Air (or water) that supplied from compressor injected to rotating twin roller through axis hole, and sprayed out of fine hole on the surface. The crusher that manufactured with sprayed air (or water) can make high-quality primary styrofoam removed pollution and dust. In case of mixed sprayed air and water, clean degree of crushed styrofoam was higher than single sprayed air. This could be contributed to reduce environmental pollution, cost and space in standpoint of recycling scrapped styrofoam.

• Journal of Drive and Control
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• v.16 no.2
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• pp.1-7
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• 2019

Jaw crusher is a device that breaks rock collected from mines or quarries to produce aggregates of the size desired by user. A representative method for measuring load is to measure them by attaching force sensors directly to the part where the load is generated. However, the direct method has many limitations such as high-impact loads generation in equipment or space constraints, sensor capacities and costs. Therefore, Transfer Path Analysis (TPA) was used to indirectly measure impact loads by attaching acceleration sensors. In this study, both direct and TPA methods were used to measure the impact load of Jaw crusher. This study finally quantifies the impact of the load generated by the Jaw crusher using direct method and TPA method, and comparing the impact load measured calculated the derive the error rate.

• Journal of Drive and Control
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• v.19 no.4
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• pp.77-84
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• 2022

The aims of this study was to estimate transfer force delivered to cone crusher housing and contribution of force transmission. The rock crushing condition caused vibrations in the cone crusher housing, which were experimentally measured, and frequency response functions (FRF) were also found through modal impact tests. Vibration data and frequency response functions were applied to the transfer path analysis (TPA) model. Next, transfer forces delivered to the cone crusher housing were quantified via the TPA method. Contribution of force transfer was also analyzed based on force estimation results. Finally, this study describes basic concepts and components of the TPA method and reviews its applicability to rotating machinery that experiences impact vibrations and forces.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.249-250
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• 2010

This study analyzes the basic characteristics of the concrete using recycled coarse aggregates produced by using a rotary crusher and compares it to that of using a cone crusher. As a result, the recycled aggregate produced by using the rotary crusher represents more excellent results in fluidity and compressive strength according to the increase in the replacement rate of recycled aggregates than that of using the cone crusher. It can be analyzed that it was due to the fact that the particle shape of the recycled aggregate produced by using the rotary crusher showed round figures relatively and that leaded to reduce friction force and remove lots of grouted mortar caused by its wearing.