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Articles 1 - 30 of 327

Full-Text Articles in Mining Engineering

Analysis Of The Effect Of Different Surface Preparation Methods On Corrosion Resistance And Adhesion Strength Of Astm A36 Steel Substrate With Surface Tolerant Epoxy Paint As Coating Material, Irwan Wijaya Santoso, Daffa Aqila, Rini Riastuti, Rizal Tresna Ramadhani May 2024

Analysis Of The Effect Of Different Surface Preparation Methods On Corrosion Resistance And Adhesion Strength Of Astm A36 Steel Substrate With Surface Tolerant Epoxy Paint As Coating Material, Irwan Wijaya Santoso, Daffa Aqila, Rini Riastuti, Rizal Tresna Ramadhani

Journal of Materials Exploration and Findings

In the industrial world, to extend the service life of materials, protection methods are carried out to slow down the material's corrosion rate. The protection method that is often used is the coating method. The coating method is a protection method by coating the substrate material using a coating material to prevent contact between the substrate material and the environment. In this research, the substrate material used is ASTM A36 steel and the coating material used is Surface Tolerant Epoxy paint. The independent variable used in this study lies in the surface preparation method which consists of: solvent cleaning, hand …


Combined Risk Based Inspection And Fault Tree Analysis For Repetitive 3-Phase Line Piping Leakage At West Java Offshore Topside Facility, Dona Yuliati, Akhmad Herman Yuwono, Datu Rizal Asral, Donanta Dhaneswara Dec 2023

Combined Risk Based Inspection And Fault Tree Analysis For Repetitive 3-Phase Line Piping Leakage At West Java Offshore Topside Facility, Dona Yuliati, Akhmad Herman Yuwono, Datu Rizal Asral, Donanta Dhaneswara

Journal of Materials Exploration and Findings

Hydrocarbon releases might result in serious consequences in various aspects. In addition to the contribution to environmental pollution, repetitive leakages need high repair costs. This study aim is to minimize potential repetitive leakage for other typical 3-phase piping systems. We conducted the risk assessment by adopting Risk Based Inspection (RBI) API 581 to identify risk level, calculating piping lifetime, recommended inspection plan and mitigations. The most relevant root causes can be obtained through quantitative Fault Tree Analysis (FTA). Observation and investigation was taken from eight 3-phase piping systems that experienced repetitive leakages. It has been found that the risk level …


Nitrogen Gas Quenching Pressure Effect On Bs S155 Alloy Steel In Vacuum Furnace, Agus Mulyadi Hasanudin, Eddy Sumarno Siradj Dec 2023

Nitrogen Gas Quenching Pressure Effect On Bs S155 Alloy Steel In Vacuum Furnace, Agus Mulyadi Hasanudin, Eddy Sumarno Siradj

Journal of Materials Exploration and Findings

The production of metal and alloy products requires the use of heat treatment, when during the heat treatment process, quenching is a crucial step. The quenching medium can be anything from water, a salt bath, oil, air and gas. In a vacuum furnace, pressurized gas, most frequently nitrogen (N2) gas, serves as one of the quenching mediums. One of the drawbacks of the quenching process is the distortion and dimensional change of the parts. This paper aims to investigate the influence of nitrogen gas quenching pressure on the distortion and dimensional change of aerospace actuator gear planet parts …


Experimental And Machine Learning Studies On Chitosan-Polyacrylamide Copolymers For Selective Separation Of Metal Sulfides In The Froth Flotation Process, Keitumetse Monyake, Taihao Han, Danish Ali, Lana Z. Alagha, Aditya Kumar Jun 2023

Experimental And Machine Learning Studies On Chitosan-Polyacrylamide Copolymers For Selective Separation Of Metal Sulfides In The Froth Flotation Process, Keitumetse Monyake, Taihao Han, Danish Ali, Lana Z. Alagha, Aditya Kumar

Mining Engineering Faculty Research & Creative Works

The froth flotation process is extensively used for the selective separation of valuable base metal sulfides from uneconomic associated minerals. However, in this complex multiphase process, various parameters need to be optimized to ensure separation selectivity and peak performance. In this study, two machine learning (ML) models, artificial neural network (ANN) and random forests (RF), were used to predict the efficiency of in-house synthesized chitosan-polyacrylamide copolymers (C-PAMs) in the depression of iron sulfide minerals (i.e., pyrite) while valuable base metal sulfides (i.e., galena and chalcopyrite) were floated using nine flotation variables as inputs to the models. The prediction performance of …


Machinability Of High Mn Steel Using Tool Life Criteria, Dika Handayani, Victor F. Okhuysen, Nicole Wagner May 2023

Machinability Of High Mn Steel Using Tool Life Criteria, Dika Handayani, Victor F. Okhuysen, Nicole Wagner

Engineering Faculty Articles and Research

High Mn steel alloys have shown to provide both high strength and ductility. However, current literature offers limited guidance on the machinability of these steel alloys. Therefore, this work provides turning recommendations for high Mn steel that is based on tool life data. Several indexable carbide inserts with various rake angles were used to machine cast billets of high Mn steel. Turning characteristics from various feed rates, cutting speeds, and depths of cut were analyzed. Through a design of experiments, it was determined that the feed rate was the most significant factor affecting tool life and that a tool with …


Dynamic Rbi With Central Difference Method Approach In Calculation Of Uniform Corrosion Rate: A Casestudy On Gas Pipelines, M.Riefqi Dwi Alviansyah, Fernanda Hartoyo, Zahra Nadia Nurullia, Ari Kurniawan Dec 2022

Dynamic Rbi With Central Difference Method Approach In Calculation Of Uniform Corrosion Rate: A Casestudy On Gas Pipelines, M.Riefqi Dwi Alviansyah, Fernanda Hartoyo, Zahra Nadia Nurullia, Ari Kurniawan

Journal of Materials Exploration and Findings

The oil and gas industry generally uses a piping system to drain fluids. Even though the pipes used have been well designed, the use of pipes as a means of fluid transportation still provides the possibility of failure that can occur at any time, one of which is due to uniform corrosion. The use of standard Risk Based Inspection (RBI) according to the API RBI 581 document has been widely used to anticipate potential failures to pipe components. The use of standard RBI can reduce the risk of failure significantly. Because the standard RBI considers the component risk value to …


Preface Of Volume 1 Issue 1 On Journal Of Materials Exploration And Findings (Jmef), Jaka Fajar Fatriansyah Aug 2022

Preface Of Volume 1 Issue 1 On Journal Of Materials Exploration And Findings (Jmef), Jaka Fajar Fatriansyah

Journal of Materials Exploration and Findings

No abstract provided.


The Optimization Of Failure Risk Estimation On The Uniform Corrosion Rate With A Non-Linear Function, Fernanda Hartoyo, Jaka Fajar Fatriansyah, Imam Abdillah Mas'ud, Farhan Rama Digita, Hanna Ovelia, Datu Rizal Asral Aug 2022

The Optimization Of Failure Risk Estimation On The Uniform Corrosion Rate With A Non-Linear Function, Fernanda Hartoyo, Jaka Fajar Fatriansyah, Imam Abdillah Mas'ud, Farhan Rama Digita, Hanna Ovelia, Datu Rizal Asral

Journal of Materials Exploration and Findings

Failures in the oil and gas pipeline system are conditions that must be avoided and anticipated because the losses due to the failures can occur at a very high level. Internal corrosion is one of the significant causes of the failures in pipeline systems. In addition, this type of corrosion is due to the high content of carbon dioxide and other corrosive substances in crude oil and natural gas. Therefore, an optimal inspection scheduling system is required to prevent the possibility of pipeline failures due to corrosion and to avoid any overspending on the budget due to excessive inspection scheduling. …


Contents, Jaka Fajar Fatriansyah Aug 2022

Contents, Jaka Fajar Fatriansyah

Journal of Materials Exploration and Findings

No abstract provided.


Challenges & Pragmatic Solutions For The Design And Construction Of A 300-Acre Ccr Landfill Located In The Southwestern Us - A Case Study, Andy Lucas, Jason Pokorny May 2022

Challenges & Pragmatic Solutions For The Design And Construction Of A 300-Acre Ccr Landfill Located In The Southwestern Us - A Case Study, Andy Lucas, Jason Pokorny

World of Coal Ash Proceedings

No abstract provided.


Ccr Beneficial Use Data Capture And Reporting, Joe Ploetz, Kevin Foody May 2022

Ccr Beneficial Use Data Capture And Reporting, Joe Ploetz, Kevin Foody

World of Coal Ash Proceedings

No abstract provided.


Geochemical Explanations For Strong Natural Attenuation Of Molybdenum, Selenium, And Lithium In A Groundwater Plume, Jacob Chu, J. P. Brandenburg May 2022

Geochemical Explanations For Strong Natural Attenuation Of Molybdenum, Selenium, And Lithium In A Groundwater Plume, Jacob Chu, J. P. Brandenburg

World of Coal Ash Proceedings

No abstract provided.


The Intersection Of The Ccr Rule, Superfund, And Irrigation On The Great Plains, Shane D. Mcdonald, Jillian Troyer, Robert Kleinmann, Marty Stange May 2022

The Intersection Of The Ccr Rule, Superfund, And Irrigation On The Great Plains, Shane D. Mcdonald, Jillian Troyer, Robert Kleinmann, Marty Stange

World of Coal Ash Proceedings

No abstract provided.


Attenuation And Source Zone Depletion Of Boron From Coal Combustion Residuals In Groundwater, J.P. Brandenburg, Dave Hagen May 2022

Attenuation And Source Zone Depletion Of Boron From Coal Combustion Residuals In Groundwater, J.P. Brandenburg, Dave Hagen

World of Coal Ash Proceedings

No abstract provided.


Whole Effluent Toxicity (Wet) Assessments And Experimental Considerations For Evaluating Coagulation Agents And Polymers For Wastewater Treatment Of Coal Combustion Products, Konrad J. Kulacki, William L. Goodfellow Jr., Margaret L. Fleming, Alexandra N. Steele May 2022

Whole Effluent Toxicity (Wet) Assessments And Experimental Considerations For Evaluating Coagulation Agents And Polymers For Wastewater Treatment Of Coal Combustion Products, Konrad J. Kulacki, William L. Goodfellow Jr., Margaret L. Fleming, Alexandra N. Steele

World of Coal Ash Proceedings

No abstract provided.


Benefits Of Numerical Flow And Transport Modeling Applied To Ccr Site Characterization, Remedial Design, And Closure, Johnathan F. Ebenhack, Eric M. Hicks May 2022

Benefits Of Numerical Flow And Transport Modeling Applied To Ccr Site Characterization, Remedial Design, And Closure, Johnathan F. Ebenhack, Eric M. Hicks

World of Coal Ash Proceedings

No abstract provided.


Geostructural Construction In Ash: An Update On The Largest Geostructural Work To Date, Anthony Sak, Ryan T. Smith May 2022

Geostructural Construction In Ash: An Update On The Largest Geostructural Work To Date, Anthony Sak, Ryan T. Smith

World of Coal Ash Proceedings

No abstract provided.


Monitoring Of Construction Over Soft Ccr Deposits, Pedro J. Amaya, Michelle Perez-Canals, Mary Nodine, Will G. Lukas May 2022

Monitoring Of Construction Over Soft Ccr Deposits, Pedro J. Amaya, Michelle Perez-Canals, Mary Nodine, Will G. Lukas

World of Coal Ash Proceedings

No abstract provided.


Groundwater Monitoring Plan Considerations For Assessment And Corrective Action Sites, Sherren Clark, Nicole Kron, Tom Karwoski, Bernd Rehm May 2022

Groundwater Monitoring Plan Considerations For Assessment And Corrective Action Sites, Sherren Clark, Nicole Kron, Tom Karwoski, Bernd Rehm

World of Coal Ash Proceedings

No abstract provided.


Evaluation Of Remedial Actions At Coal Combustion Residuals (Ccr) Sites Through Coupled Hydrogeological-Geochemical Reactive Transport Modeling, Pj Nolan, William Deutsch, Greg Lehn, Rens Verburg May 2022

Evaluation Of Remedial Actions At Coal Combustion Residuals (Ccr) Sites Through Coupled Hydrogeological-Geochemical Reactive Transport Modeling, Pj Nolan, William Deutsch, Greg Lehn, Rens Verburg

World of Coal Ash Proceedings

No abstract provided.


Evaluation Of Methods To Differentiate Ccr From Native Soil Or Fill With Similar Visual/Physical Characteristics To Successfully Facilitate Ccr Removal, Trenton M. Godwin, Stephen K. Wilson, Kevin M. Stephenson May 2022

Evaluation Of Methods To Differentiate Ccr From Native Soil Or Fill With Similar Visual/Physical Characteristics To Successfully Facilitate Ccr Removal, Trenton M. Godwin, Stephen K. Wilson, Kevin M. Stephenson

World of Coal Ash Proceedings

No abstract provided.


Smart Technology To Identify Leaks And Enhance Pipeline Safety, Cory Solyom May 2022

Smart Technology To Identify Leaks And Enhance Pipeline Safety, Cory Solyom

World of Coal Ash Proceedings

No abstract provided.


Selen-Ix™ Applied To Coal Ash Pond Clean-Up, Brent Baker, Veneil Sundar, Alex Soto May 2022

Selen-Ix™ Applied To Coal Ash Pond Clean-Up, Brent Baker, Veneil Sundar, Alex Soto

World of Coal Ash Proceedings

No abstract provided.


Reducing The Cost Of Wastewater Treatment From Coal Ash Basin Closure Projects Using Closed Loop Zero Valent Iron Treatment Methods, Madan Tandukar, Alex Korff, Andrew Vincent, Chris Hardin May 2022

Reducing The Cost Of Wastewater Treatment From Coal Ash Basin Closure Projects Using Closed Loop Zero Valent Iron Treatment Methods, Madan Tandukar, Alex Korff, Andrew Vincent, Chris Hardin

World of Coal Ash Proceedings

No abstract provided.


Sono-Processing Of Coal For Removal Of Ash And Other Impurities, Ramamurthy Nagarajan May 2022

Sono-Processing Of Coal For Removal Of Ash And Other Impurities, Ramamurthy Nagarajan

World of Coal Ash Proceedings

No abstract provided.


Polymer-Free Geosynthetic Clay Liner For Containment Of Aggressive Leachates, Trevor Walker, Stefan Niewerth May 2022

Polymer-Free Geosynthetic Clay Liner For Containment Of Aggressive Leachates, Trevor Walker, Stefan Niewerth

World of Coal Ash Proceedings

No abstract provided.


Ibutton Thermocon: Economically Measure Mortar Temperature Generation To Estimate Time Of Set, Carl Howard May 2022

Ibutton Thermocon: Economically Measure Mortar Temperature Generation To Estimate Time Of Set, Carl Howard

World of Coal Ash Proceedings

No abstract provided.


Mse Berm: Overcome Site Constraints And Maximize Air Space, Johnny Lowe, Jason Thaxton May 2022

Mse Berm: Overcome Site Constraints And Maximize Air Space, Johnny Lowe, Jason Thaxton

World of Coal Ash Proceedings

No abstract provided.


Pre-Design Bench-Scale Evaluation Of The Effectiveness Of Ash Pond Closure In Place Using In-Situ Soil Stabilization, Marc B. Okin, Jeffery A. Miller, William J. Haswell, Sonya Burns May 2022

Pre-Design Bench-Scale Evaluation Of The Effectiveness Of Ash Pond Closure In Place Using In-Situ Soil Stabilization, Marc B. Okin, Jeffery A. Miller, William J. Haswell, Sonya Burns

World of Coal Ash Proceedings

No abstract provided.


Ccr Removal And Its Effects On Soil And Groundwater Geochemistry, Sarah Holmstrom, Clint Miller May 2022

Ccr Removal And Its Effects On Soil And Groundwater Geochemistry, Sarah Holmstrom, Clint Miller

World of Coal Ash Proceedings

No abstract provided.