Use of drilling performance to improve rock-breakage
In a hard-rock mine, blasting is an important rock-breakage process that impacts energy consumption both in downstream comminution processes and mine Regarding such a situation, this article describes the effects of rock fragmentation by blasting on the energy consumption, productivity, minerals’ recovery, Reduction of Fragment Size from Mining to Mineral
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Experimental Investigation on the Energy
Experimental Investigation on the Energy Consumption Difference between the Dynamic Impact and the Drilling Tests of Rocks Shock and Vibration / 2022 / Article Special Issue Dynamic Mechanical CDEE can represent the crushing degree of specimens with the same crushing energy consumption per unit volume and measure the efficiency of rock Energies Free Full-Text Evaluation of the Energy Consumption
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Evaluation of size reduction process for rock aggregates in
Fig. 1 Schematic representations of rock fracturing in several crushers. a Jaw crusher. b Cone crusher (modified after Kelly and Spottiswood 1982 and Lee and In order to better find the aspect ratio and loading strain rate that can crush better and maintain a long equilibrium time, the energy consumption of rock crushing is further analyzed. The energy dissipation Applied Sciences Free Full-Text Energy
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Investigating the effects of feeding properties on rock breakage
1. Introduction Rock crushing is the first mechanical comminution process after drilling and blasting operations in rock fragmentation. The energy required for The flawed rock masses with joints, fissures, and other defects in cold regions engineering are affected by freeze–thaw (F-T) cycles. Substantial efforts have been focused on the mechanicalCalculation results of energy consumption for rock
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Research on Particle Size and Energy
To study the particle size distribution and energy variation law of hard coal under a load, an impact compression test of hard coal specimens under different impact loading conditions was carried out Stress equilibrium time is an important index to judge the homogeneity of rocks. In order to study the relationship between stress equilibrium time and crushing energy consumption before rock Applied Sciences Free Full-Text Energy
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Predicting the crushability of rocks from the impact strength
Berry et al. (1984) determined some rock properties such as compressive and tensile strength, Young’s modulus, porosity and attempted to correlate these to the performance of a jaw crusher. Bearman et al. (1991) examined the relation between rock strength and power consumption and product size in crushing.Most of the costs in open pit quarry operations occur in crushing and grinding processes. Therefore, the management of crushing–grinding processes is very important. Many researchers investigated the effects of pile size distribution and specific charge values occurring as a result of blasting on crusher energy consumptions and Development of a model estimating energy consumption values
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New testing methodology for the quantification of rock
Crushing is a size reduction process that plays a key role in both mineral processing and crushing–screening plant design. Investigations on rock crushability have become an important issue in mining operations and the manufacture of industrial crusher equipment. The main objective of this research is to quantify the crushability of hard To better understand and predict power consumption during the crushing stage and the product particle size distribution as a function of the CSS, feed size and rock strength, Bearman et al. (1991) performed pilot-plant scale experiments using a laboratory scale cone crusher. The authors drew some conclusions regarding the relationship Prediction of power consumption and product size in cone crushing
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Dynamic response characteristics and damage rule of graphite ore rock
The dynamic mechanical properties, crushing characteristics and energy consumption characteristics of rock materials can be studied by SHPB test, and more and more achievements have been producedIn short, the weakening of gas on the strength of the coal sample XQ is more serious than that of the ZZ. The experimental results showed that under the same crushing energy, the higher the gas pressure was, the less energy was consumed by the impact crushing of coal sample, and the coal sample was more likely to be crushed or Experimental study on particle size distribution of
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Effects of compression and sliding on the wear and energy consumption
The dual pivoted jaw crusher was designed mainly for the research of the crushing contacts. It can be used to obtain information as to how the crushing forces, the jaw movements, the jaw geometry, the mechanical properties of the jaw material, and the comminuting rock are related to the wear and energy consumption during rock crushing.6-10% savings in primary crushing costs measured by power consumption Processing The shot-rock is typically transported to the crushing plants using trucks. The large end users in the crushing plant consist of feeders, crushers, conveyors and screens. Figure 2 below shows the relative significance of the different electric energy users in aEnergy Efficiency Opportunities in the Stone and Asphalt
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Assessing the energy efficiency of a jaw crusher ScienceDirect
As the rock comminution and energy efficiency can be defined as a function of area increment of particles in jaw crusher [41], the production of fines can be diminished by regulating the mf in the crushing chamber. From this point of view, feed level sensors or circuit breaker plugs may be beneficial for the regulation of mf during jaw crushing.Over the last few decades, the demand for energy-efficient mineral-processing methods has continued. The necessity to develop energy-efficient technologies for the mineral industry will increase in the future, considering the exhaustion of high-quality resources and severe environmental limitations. The subject of this study is crushing Modeling and Improving the Efficiency of Crushing Equipment
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Production of natural and recycled aggregates: the
The energy consumption and CO 2 emissions [] are the most visible environmental criteria in the feasibility of recycling concrete measures [].The scenarios of emissions include CO 2, CO, C x H y, NO x, and SO 2 pollutants. In this research, however, we only investigate CO 2 emissions with respect to their importance in the field of Using two rock samples containing high and low amounts of magnesium- and calcium-rich minerals (basalt and granite, respectively), Stillings and colleagues report the high efficiency of bothMost rocks trap CO2 Nature Sustainability
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Energy Requirement for Rock Breakage in Laboratory
For instance, the energy efficiency is about 10% in percussive rock drilling (Carrol 1985), 3–5% in rock crushing (Prasher 1987), 1% in ball and rod milling (or grinding) (Chi et al. 1996; Alvarado et al. 1998; Fuerstenau and Abouzeid 2002), and about 6% in rock blasting (Ouchterlony et al. 2003; Sanchidrián et al. 2007). These low energyThe energy consumption and transmission of the discharge channel inside of the rock can be described by Fig. 2. W g is the total energy of the storage capacitor. W R is the energy which is consumed by the equivalent resistance of the circuit. W ch is energy which is transmitted into the discharge channel. The transmitted energy can be divided Experimental Researches on Pulse Plasma Discharge for
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Applied Sciences Special Issue : Advances and Challenges in Rock
The dissipation energy of coal rock crushing also increases linearly with the impact velocity. There is no obvious regular change between the energy dissipation rate of coal rock and impact velocity during impact damage, and the dissipated energy of macroscopic crushing only accounts for 10~20% of the incident energy; most of the energy is usedKorman et al. (Korman et al., 2015) applied direct measurement of the power on the jaw crusher motor to evaluate the effect of mechanical properties of rocks on crushing energy of jaw crusher.Impact of physical and mechanical properties of rocks on energy
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Research on Particle Size and Energy Consumption Law of
To study the particle size distribution and energy variation law of hard coal under a load, an impact compression test of hard coal specimens under different impact loading conditions was carried out using a Φ50 mm diameter Separate Hopkinson Press Bar (SHPB) test system. We implemented the theory of dynamic impact energy of rock to rock fragmentation is essentially a process of energy consumption. The energy consumption analysis is the key approach to illuminate the mechanism of rock fragmentation [4]. In current percussive drilling, blasting, crushing, and grinding, the effective energy used in rock breakage is found to be quite low in comparison with the total input Energy consumption in rock fragmentation at
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