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Daniel B. Parvaz

Daniel B. Parvaz
Lightning Machines · Management

Ph.D., MCSM

About

34
Publications
11,370
Reads
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84
Citations
Introduction
Director of Lightning Machines technology growth consultancy, offering social media management and technical editing solutions. Former development project lead and global sales manager at SELFRAG AG. Current projects involve developing innovative processing solutions for the mining and recycling industries, as well as new applications for SELFRAG systems within the geoscience community. Get in touch to discuss electric pulse treatment research collaborations!
Additional affiliations
July 2019 - present
Lightning Machines
Position
  • Managing Director
September 2014 - September 2019
SELFRAG AG
Position
  • Geology and Mining Development
Description
  • Developing applications for SELFRAG high voltage systems for use in geological research and the mining industry.
September 2009 - June 2014
University of Exeter
Position
  • PhD
Education
September 2009 - July 2015
University of Exeter, Camborne School of Mines
Field of study
  • Exploration Geoscience
September 2007 - May 2008
University of Alberta
Field of study
  • Geosciences
September 2005 - July 2009
University of Leeds
Field of study
  • Geosciences

Publications

Publications (34)
Research
Please cite as: Parvaz, D.B., 2014. Oxidation Zones of Volcanogenic Massive Sulphide Deposits in the Troodos Ophiolite, Cyprus: Targeting Secondary Copper Deposits. PhD Thesis, Camborne School of Mines, University of Exeter. DOI: 10.13140/RG.2.1.1420.5843/1 Gossans, the brightly coloured oxidation products of sulphide mineralised rocks, have acte...
Article
Two approaches for the use of the Electric Pulse Fragmentation (EPF) in the beneficiation of a low-grade cassiterite schist ore were investigated through pilot-scale tests performed on samples of about 270 kg. The first approach used EPF treatment for pre-concentration while in the second approach the EPF technology was mostly used for crushing. Co...
Article
Electric Pulse Fragmentation (EPF) is an innovative technology that uses High-Voltage Pulsed Power (HVPP) for the selective comminution of a material. This paper aims to compare a beneficiation flowsheet including an EPF treatment in the comminution circuit to a conventional pathway where the EPF step was replaced by a series of jaw crushers. Tests...
Article
Full-text available
The Troodos ophiolite, Cyprus is the principal on- land analogue for mafic-hosted volcanogenic massive sulfide (VMS) deposits. This study, for the first time, presents sulfur isotope (δ³⁴S) data on a regional scale from VMS deposits and other mineralised zones across the Troodos ophiolite. In combination δ³⁴S, Se/S ratios and trace element chemistr...
Preprint
Full-text available
Porphyry-type deposits are a vital source of green technology metals such as copper and molybdenum. They typically form in subduction-related settings from large, long-lived magmatic systems. The most widely accepted model for their formation requires that mantle-derived magmas undergo a multi-million year timescale ramp-up in volatiles and ore-for...
Article
Full-text available
The excessive energy consumption from the mining industry are currently receiving international attention. A promising method able to enhance significantly the comminution process efficiency worldwide is by using electric pulse fragmentation treatment. However, to insure a minimum energy consumption in real scale operation, an online process monito...
Article
Full-text available
Three disaggregation methods, i.e. Calgon, acetic acid and electric pulse fragmentation (EPF), have been applied to a range of heavily lithified, carbonate-rich sedimentary rock samples of Paleogene age. Samples are predominantly from the carbonate-rich, shallow water domain (<250 m palaeo-water depth) of Tanzania, Malta and the United Arab Emirate...
Preprint
Full-text available
The excessive energy consumption from the mining industry are currently receiving international attention. A promising method able to enhance significantly the comminution process efficiency worldwide is by using electric pulse fragmentation treatment. However, to insure a minimum energy consumption in real scale operation, an online process monito...
Method
Full-text available
Meteorites are precious specimens which must be fragmented to investigate their mineral composition. Their value means that as little material must be lost during crushing as possible. A fragment of the McKinney meteorite was fragmeted using a Selfrag microprocess vessel, retaining all material and producing intact apatite grains which can be easil...
Experiment Findings
Full-text available
This study is to determine the potential advantages in the use of electric pulse fragmentation (EPF) in the recovery of high tech metals (e.g. REE’s, indium) from waste electronics via (bio)leaching. A selection of used iPhones, one of the most common e-waste products, were fragmented in the Lab system using cycles of 25 pulses at 180kV. After each...
Presentation
Full-text available
Electric pulse fragmentation (EPF) is a novel comminution process where ‘lightning bolts’, or highly energetic electrical discharges, are applied to materials immersed in water. These discharges exploit the variability in electrical and acoustic properties of a composite material and selectively fragment it along internal compositional boundaries....
Presentation
Full-text available
Disposal of the solid residues of municipal waste incineration, incinerator bottom ash (IBA) is a challenge. IBA metal content can be up to 12%, classing it as a ‘reactive’ waste, increasing landfill costs. Metal recovery decontaminates and reduces the volume to landfill, generates additional revenue. Conventional technology has shown potential rec...
Presentation
Full-text available
An increasing trend in the mining industry is the exploitation of lower-grade and more mineralogically complex ores to meet global demand. Processing of these low-grade or complex ores is often challenging due to the difficulty of accessing the valuable minerals to produce the concentrate necessary for metallurgical use in a cost-effective way as m...
Article
Full-text available
Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC) such as LafargeHolcim Ductal® is a new concrete product that incorporates large amounts of fine metal fibres, and is designed to have multiple advantages over traditional concrete products. These fibres, while providing additional strength, represent a new recycling challenge as they may blo...
Conference Paper
Full-text available
Electric pulse fragmentation (EPF) is an innovative technology that uses high-voltage pulsed power (HVPP) for the selective comminution of the treated material. Highly energetic electrical pulses are used to fracture rocks at mineral grain boundaries, resulting in extensive micro-cracks and/or complete fragmentation of the processed particles depen...
Method
Full-text available
The SELFRAG Lab is a laboratory scale solution for the selective fragmentation of composite materials. The Lab uses high voltage electric discharges to fragment materials along grain boundaries, liberating individual components from the surrounding matrix. This study highlights the application of electric pulse fragmentation (EPF) in the recovery o...
Method
Full-text available
The SELFRAG Lab is a laboratory scale solution for the selective electric pulse fragmentation (EPF) of composite materials. The Lab uses high voltage electric discharges to fragment materials along grain boundaries. This study highlights the application of EPF in the crushing of pure mineral separates to remove inclusions and produce a finer produc...
Presentation
Full-text available
Analytical capability increases year on year as both technology and methodologies improve analytical detection limits, accuracy and precision of scientific instrumentation. Sample preparation methods, however, have remained largely unchanged for the past century. Jaw crushing and milling are dust generating and highly destructive, losing or breakin...
Method
Full-text available
This document is initially intended to provide a guide on how to extend the life of wear parts, and give information on the pitfalls of processing certain materials. The list of materials is constructed primarily from personal experience of a range of SELFRAG staff during their time using the machine is by no means exhaustive: it simply reflects th...
Conference Paper
Full-text available
This study investigates the efficiency of electrodynamic fragmentation (EDF) technology for the up-cycling of concrete waste. Tests were performed at a continuous production scale at various operating conditions and showed that high liberation and recovery rates of aggregates were obtained after just one treatment step performed at 1 kWh/t. These r...
Method
Full-text available
Advice on Processing using the SELFRAG Lab: Materials
Poster
Full-text available
Selective fragmentation of geologic materials was performed on samples including granodiorite, quartz pebble conglomerate, amphibolite, ash flow tuff, and fossiliferous carbonate. Minerals and fossils of interest include zircon (igneous and detrital grains), apatite, amphibole, monazite, titanite, sanidine, and conodont tests. Each sample has corre...
Poster
Full-text available
Energy savings in comminution is an increasingly important topic as ore bodies become increasingly difficult and expensive to exploit. SELFRAG high voltage (HV) breakage technology uses HV pulse generators to apply extremely energetic electric discharges to solids placed between two electrodes, resulting in extensive micro-fracturing (weakening) an...
Conference Paper
Full-text available
Energy savings in comminution is an increasingly important topic as ore bodies become increasingly difficult and expensive to exploit. SELFRAG high voltage (HV) breakage technology uses HV pulse generators to apply extremely energetic electric discharges to solids placed between two electrodes, resulting in extensive micro-fracturing (weakening) an...

Questions

Questions (7)
Question
Hi all, our recent work into the use of electric pulses to disaggregate indurated limestones, allowing fast (minutes) recovery of foraminifera is now available open access on the link below, check it out!
#fossils #climate #oilandgas
Question
We have a new article out regarding liberation and recovery of intact foraminifera from indurated carbonates - we compare state-of-the-art with avant-garde novel methods and asses quality of recovery. Hopefully this will be intersting (and time saving) for your research group.
Question
I'm curious to learn more about how knowledge is disseminated through the scientific community in the digital age. researchGate in particular is good for uggesting new articles, but what other methods do you use to learn about the latest developments in your field, so what is your primary source for new articles/lnowledge:
  • Researchgate suggestions
  • Digest from journal subscription
  • Direct updates from academics you follow on social media, e.g. Twitter
  • Manual web search - e.g. keywords into Google Scholar
  • Browsing periodicals
What other ways do you use to keep up with the state-of-the-art?
Question
Please see attached image - last month my research interest (RI) score was over 100, now it's ~5, with no change in publications.
I've looked at colleagues profiles and theyre showing a drop to single digits also.
This seems strange. Is there a reason for this drop off, or is it a blip?
Cheers,
Dan
Question
Hi all,
Just putting a couple of our latest articles on your radars regarding the electric pulse fragmentation of low grade or complex metal ores. As part of the Horizon 2020 FAME project, we put W-scheelite and Sn-Skarn ores into the SELFRAG Lab and continuous systems and shot them through with lightning, the result being an upgrading of target minerals in the fine fraction, and fracture generation in the coarse gangue, resulting in weakening.
The papers are available to download for free until 19th April from Minerals Engineering online.
1) Comparative laboratory study of conventional and Electric Pulse Fragmentation (EPF) technologies on the performances of the comminution and concentration steps for the beneficiation of a scheelite skarn ore
2) Pilot-scale investigation of two Electric Pulse Fragmentation (EPF) approaches for the mineral processing of a low-grade cassiterite schist ore
If you're interested in the work we're doing, please get in touch.
Cheers,
Dan
Question
If you are interested in the re-use and recycling of concrete, we have recently published on the use of electric pulse fragmentation (EPF) on the liberation of steel fibres from ultra high performance fibre reinforced concrete (UHPFRC) produced by LafargeHolcim.
The full paper in in Minerals Engineering volume 128, and the abstract can be found here:
This work is part of the larger Horizon 2020 HISER project (link below). If you have any questions about the work, please ask.
#concrete #recycling
Question
Dear all,
This is a notice that there will be several presentations on the effects and application of high voltage electric pulse fragmentation (EPF) on a range of materials, from ore rocks to LED lamps at the Internation Mineral Porcessing Congress (IMPC) 2018 in Moscow.
If you are interested in the technology and want to learn more, please follow the link below to see the presentation sessions and times:
As always, you can follow my or SELFRAG's ResearchGate page to see our research and recommended publications to learn more about EPF.
Cheers,
Dan

Network

Cited By

Projects

Projects (6)
Project
To determine whether there is an advantage to using high voltage electricl pulses in the disaggregation of industrial and domestic wastes in raw material recovery.
Project
To determine the effects of high voltage electric pulses on ore materials.