Papers by Mr. Edward Yin
Journal of engineering, Wiley, 2024
'is paper presents a simple design, low-cost, electromechanical overloading system, which is easy... more 'is paper presents a simple design, low-cost, electromechanical overloading system, which is easy to use and install and suitable
for all types of truck chassis and suspension. 'is design can detect an overload, signal the driver, and also interrupt ignition when
the truck is overloaded. 'e system was modelled using CAD software, and FEA was performed on the spring component to verify
analytical solutions. Components of the overload detection system include a load carrying springs, an electrical relay, ignition
system, an LED for signaling overload, and an electrical circuit. Results showed that, for a 3-axle trucks, the allowable pay load was
15.125 tonnes, and each spring in the design supports a minimum weight of 74.183 kN. A spring index of 4.009 was achieved in line
with safe design conforming to 4≤C≤12 with a spring rate of 1464305.5 N/m. 'e spring displacement needed to actuate the
overloading system was 51 mm. FEA which was performed validated analytical solutions in that the induced von Mises stress
which was 69.92 MPa was below the yield strength of the material (200 MPa) and the factor of safety obtained was 1.24 signifying
safe design. 'e designed electromechanical system is capable of detecting an overloadand also interrupting the truck ignition.
Installation can be installed on new trucks or by retro:tting onto old trucks.
The issue of gold losses and low recovery is critical in the small-scale mining industry. Despite... more The issue of gold losses and low recovery is critical in the small-scale mining industry. Despite the mechanization of the industry, most small-scale miners use simple and less efficient traditional sluices to concentrate gold from the gangue minerals. Research shows that recovery in these traditional sluices yields much losses of the gold (mostly fine gold) to tailings, resulting in low/poor recovery. Therefore, this project seeks to design a combined gravity concentration and leaching plant to improve gold recovery in the small-scale mines. The system design was modelled using CAD software (solidworks). The design incorporated a multiple stage sluice-box and a mechanically agitated cyanide-based leaching drum. Based on the design analysis and calculation, maximum mass of gold ore material needed to be processed at a time on the sluice-box was 415 kg. The transmission power required to adequately agitate or mix the pulp of mass 900 kg in the leaching drum of capacity 0.64 m 3 was 25.2 kW, at a drum mixing speed of 100 rpm. The power was transmitted to the drum through belt pulley and bevel gear systems, reducing the engine speed from 2400 rpm to the required mixing speed of the drum. This combined technique would demonstrate an improvement in gold recovery in a cost-effective and environmentally benign manner. Therefore, adopting this design in their operations to reduce gold losses, improve local production of gold, and to boost their profit.
Industries such as mills, paper mill, food processing, fertilizer industry, pharmaceutical indust... more Industries such as mills, paper mill, food processing, fertilizer industry, pharmaceutical industry, cement industry, foundry
industry, heat treatment units, coal mines etc have roller conveyor chains as one of the important components such that its
failure ceases production. As chain links are critical components of many industrial companies, reviewing literature on the
progress of research made on it is very crucial in providing an understanding of the subject area. This paper delves into the
various literatures pertaining to conveyor chain links under categories of failure analysis, modeling and simulation as well as
wear. The various methods used for analyses, results and conclusions deduced in addition to the limitations of the various
literature are discussed in this paper
Ghana mining journal, 2024
The issue of gold losses to tailings leading to low recovery in the artisanal and small-scale min... more The issue of gold losses to tailings leading to low recovery in the artisanal and small-scale mining industries, which mostly
rely on traditional sluicing techniques to concentrate gold particles from gangue minerals, remains critical. This research
contributes to improving gold recovery by optimizing the sluice box design to improve its efficiency. Based on the multi-stage
sluice box system proposed in prior work done, Computational Fluid Dynamics (CFD) simulations was performed by varying
the slope angles of the sluice box to determine the optimal angle that will produce the highest recovery of gold concentrates
from the gangue minerals. The results obtained demonstrated that the optimal slope angle of the sluice box that retained most
gold particles was 10°. At this slope angle, the gold retention rate, flow velocity, and the number of gold particles trapped on
the sluice box were 98.81 %, 0.311 m/s, and 7905 particles, respectively. This study, therefore, provides the foundation for
numerical technique (CFD) to be used for analyzing fluid flow on a sluice box to complement experimental and empirical
techniques
A failure of conveyor chain links in a production process can cause unscheduled shutdowns, which ... more A failure of conveyor chain links in a production process can cause unscheduled shutdowns, which increase the throughput time coupled with damaged buckets and chain links, which increase maintenance and repair costs. Since failures of conveyor chains are inevitable, this research aims to modify the design of the chain bucket elevator by incorporating a ratchet mechanism, which will prevent the chain bucket assembly from dropping to the bottom of the chain bucket elevator whenever there is a chain-link failure and also avoid the jamming of the bucket chain assembly against one another when dropping to the bottom of the elevator during failure. The number of damaged buckets and chains will be minimal, thereby reducing the maintenance and repair costs. Also, the time required for replacing the failed chain link will be reduced, which in turn, will reduce the down-time, thereby increasing the production rate. The ratchet mechanism, which can withstand a maximum load of 38.10 kN, compris...
STRESS ANALYSIS AND TOPOLOGY OPTIMIZATION OF A CHAIN BUCKET ELEVATOR USING ANSYS, 2021
A failure of conveyor chain links in a production process can cause unscheduled shutdowns, which ... more A failure of conveyor chain links in a production process can cause unscheduled shutdowns, which increase the throughput time coupled with damaged buckets and chain links, which increase maintenance and repair costs. Since failures of conveyor chains are inevitable, this research aims to modify the design of the chain bucket elevator by incorporating a ratchet mechanism, which will prevent the chain bucket assembly from dropping to the bottom of the chain bucket elevator whenever there is a chain-link failure and also avoid the jamming of the bucket chain assembly against one another when dropping to the bottom of the elevator during failure. The number of damaged buckets and chains will be minimal, thereby reducing the maintenance and repair costs. Also, the time required for replacing the failed chain link will be reduced, which in turn, will reduce the down-time, thereby increasing the production rate. The ratchet mechanism, which can withstand a maximum load of 38.10 kN, compris...
Failure analysis is a critical process aimed at determining the root cause of every failure. Fail... more Failure analysis is a critical process aimed at determining the root cause of every failure. Failure of conveyor chain links in the industry has many repercussions which include; uncsheduled down - time which reduces production time coupled with damaged buckets and chain links which increases maintenance and repair cost. Failure of conveyor chain links and engineering structures on a whole is inevitable and for this reason, carrying out an investigation aimed at determining the root cause of failure is very crucial in that it can either minimize or prevent future reoccurances. Visual examination, chemical analysis and metallographic analysis were performed on both failed and un - failed conveyor chain link samples. Visual examination revealed that the type of failure was brittle fracture in that there was no necking. In addition, visual examination reavealed that there was an offset between the sprockets evidenced by indentations on the outer link of the chain link as well as vibrat...
IOSR Journal of Mechanical and Civil Engineering, 2016
Failure of chain links of a bucket elevator is inevitable. For this reason, analysis of failure i... more Failure of chain links of a bucket elevator is inevitable. For this reason, analysis of failure is very crucial to the continuous improvement on the chain links which as a result will minimize down-time therefore increasing productivity. Whenever the chain link of the bucket elevator fail, it takes the technicians a minimum of three days depending on the severity of damage. This results in increased down-time which reduces production time coupled with damaged buckets and links which increases maintenance cost. The objective of this research was to analysis the cause of failure of the chain link of a bucket elevator by carrying out visual examination, chemical analysis and metallurgical analysis on failed chain link samples. Preliminary examination using stereo microscope revealed the type of fracture is a brittle fracture and chevron marks showed that the fracture began from the core of the fractured surface and progressed through the material until eventual fracture occurred. Metallurgical analysis revealed that the micro-structure is a tempered martensite and the material had a lot of cracks embedded within it which propagated during loading. Chemical analysis revealed that the carbon content was below the required standards and therefore does not meet the requirements. It was concluded that the crack had initiated from an inclusion and therefore was the cause of failure.
Journal of Engineering
Inclusions, pores, and cracks which are defects in materials are important in determining the str... more Inclusions, pores, and cracks which are defects in materials are important in determining the structural integrity and durability of components. Modeling accurately, these defects are hence of interest to both theorist and the practitioner. CAD models were designed using Autodesk Inventor software, and simulation was performed using ANSYS academic software. Material saving in design of conveyor chain links has gained popularity, and this has led to the introduction of necks in its geometry. However, the effect of necking on various parameters was not considered. Also, inclusions which are defects in material are known to have adverse effect on the conveyor chain link. It is, therefore, imperative to predict numerically, the effects that inclusions and necking have on conveyor chain links This paper focusses on modeling nonmetallic inclusions and also tests various models of different neck radii using the finite element method so as to predict its effect.
Conference Presentations by Mr. Edward Yin
The issue of gold losses and low recovery is critical in the small-scale mining industry. Despite... more The issue of gold losses and low recovery is critical in the small-scale mining industry. Despite the mechanization of the industry, most small-scale miners use simple and less efficient traditional sluices to concentrate gold from the gangue minerals. Research shows that recovery in these traditional sluices yields much losses of the gold (mostly fine gold) to tailings, resulting in low/poor recovery. Therefore, this project seeks to design a combined gravity concentration and leaching plant to improve gold recovery in the small-scale mines. The system design was modelled using CAD software (solidworks). The design incorporated a multiple stage sluice-box and a mechanically agitated cyanide-based leaching drum. Based on the design analysis and calculation, maximum mass of gold ore material needed to be processed at a time on the sluice-box was 415 kg. The transmission power required to adequately agitate or mix the pulp of mass 900 kg in the leaching drum of capacity 0.64 m 3 was 25.2 kW, at a drum mixing speed of 100 rpm. The power was transmitted to the drum through belt pulley and bevel gear systems, reducing the engine speed from 2400 rpm to the required mixing speed of the drum. This combined technique would demonstrate an improvement in gold recovery in a cost-effective and environmentally benign manner. Therefore, adopting this design in their operations to reduce gold losses, improve local production of gold, and to boost their profit.
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Papers by Mr. Edward Yin
for all types of truck chassis and suspension. 'is design can detect an overload, signal the driver, and also interrupt ignition when
the truck is overloaded. 'e system was modelled using CAD software, and FEA was performed on the spring component to verify
analytical solutions. Components of the overload detection system include a load carrying springs, an electrical relay, ignition
system, an LED for signaling overload, and an electrical circuit. Results showed that, for a 3-axle trucks, the allowable pay load was
15.125 tonnes, and each spring in the design supports a minimum weight of 74.183 kN. A spring index of 4.009 was achieved in line
with safe design conforming to 4≤C≤12 with a spring rate of 1464305.5 N/m. 'e spring displacement needed to actuate the
overloading system was 51 mm. FEA which was performed validated analytical solutions in that the induced von Mises stress
which was 69.92 MPa was below the yield strength of the material (200 MPa) and the factor of safety obtained was 1.24 signifying
safe design. 'e designed electromechanical system is capable of detecting an overloadand also interrupting the truck ignition.
Installation can be installed on new trucks or by retro:tting onto old trucks.
industry, heat treatment units, coal mines etc have roller conveyor chains as one of the important components such that its
failure ceases production. As chain links are critical components of many industrial companies, reviewing literature on the
progress of research made on it is very crucial in providing an understanding of the subject area. This paper delves into the
various literatures pertaining to conveyor chain links under categories of failure analysis, modeling and simulation as well as
wear. The various methods used for analyses, results and conclusions deduced in addition to the limitations of the various
literature are discussed in this paper
rely on traditional sluicing techniques to concentrate gold particles from gangue minerals, remains critical. This research
contributes to improving gold recovery by optimizing the sluice box design to improve its efficiency. Based on the multi-stage
sluice box system proposed in prior work done, Computational Fluid Dynamics (CFD) simulations was performed by varying
the slope angles of the sluice box to determine the optimal angle that will produce the highest recovery of gold concentrates
from the gangue minerals. The results obtained demonstrated that the optimal slope angle of the sluice box that retained most
gold particles was 10°. At this slope angle, the gold retention rate, flow velocity, and the number of gold particles trapped on
the sluice box were 98.81 %, 0.311 m/s, and 7905 particles, respectively. This study, therefore, provides the foundation for
numerical technique (CFD) to be used for analyzing fluid flow on a sluice box to complement experimental and empirical
techniques
Conference Presentations by Mr. Edward Yin
for all types of truck chassis and suspension. 'is design can detect an overload, signal the driver, and also interrupt ignition when
the truck is overloaded. 'e system was modelled using CAD software, and FEA was performed on the spring component to verify
analytical solutions. Components of the overload detection system include a load carrying springs, an electrical relay, ignition
system, an LED for signaling overload, and an electrical circuit. Results showed that, for a 3-axle trucks, the allowable pay load was
15.125 tonnes, and each spring in the design supports a minimum weight of 74.183 kN. A spring index of 4.009 was achieved in line
with safe design conforming to 4≤C≤12 with a spring rate of 1464305.5 N/m. 'e spring displacement needed to actuate the
overloading system was 51 mm. FEA which was performed validated analytical solutions in that the induced von Mises stress
which was 69.92 MPa was below the yield strength of the material (200 MPa) and the factor of safety obtained was 1.24 signifying
safe design. 'e designed electromechanical system is capable of detecting an overloadand also interrupting the truck ignition.
Installation can be installed on new trucks or by retro:tting onto old trucks.
industry, heat treatment units, coal mines etc have roller conveyor chains as one of the important components such that its
failure ceases production. As chain links are critical components of many industrial companies, reviewing literature on the
progress of research made on it is very crucial in providing an understanding of the subject area. This paper delves into the
various literatures pertaining to conveyor chain links under categories of failure analysis, modeling and simulation as well as
wear. The various methods used for analyses, results and conclusions deduced in addition to the limitations of the various
literature are discussed in this paper
rely on traditional sluicing techniques to concentrate gold particles from gangue minerals, remains critical. This research
contributes to improving gold recovery by optimizing the sluice box design to improve its efficiency. Based on the multi-stage
sluice box system proposed in prior work done, Computational Fluid Dynamics (CFD) simulations was performed by varying
the slope angles of the sluice box to determine the optimal angle that will produce the highest recovery of gold concentrates
from the gangue minerals. The results obtained demonstrated that the optimal slope angle of the sluice box that retained most
gold particles was 10°. At this slope angle, the gold retention rate, flow velocity, and the number of gold particles trapped on
the sluice box were 98.81 %, 0.311 m/s, and 7905 particles, respectively. This study, therefore, provides the foundation for
numerical technique (CFD) to be used for analyzing fluid flow on a sluice box to complement experimental and empirical
techniques