Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Metal production"”.
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Pyrometallurgical Oxide-Sulfide Anion Exchange for Improved Material Separation and Metal Production
… processing pathways in mining, recycling, and metal production. Currently, environmentally tedious and economically burdensome chemical separations are required to produce pure compounds amenable to materials manufacturing and metal production. An alternative approach is the development of …
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The archaeology and technology of metal production in the Late Iron Age of the Southern Waterberg, Limpopo Province, South Africa
The inception of metallurgy in southern Africa was relatively late, compared to other regions in Africa, and as a result, this part of the sub-continent was mistakenly thought to have been less innovative during the Iron Age. On the contrary, dedicated materials analyses are showing that starting …
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Archaeology and archaeometallurgy in Limpopo province of South Africa: case studies of early iron age sites of Mutoti and Thomo
… sought to explore the archaeology and archaeometallurgy of the early inhabitants of the Lowveld region. Rigorous methodological and theoretical approaches, which include Ethno-Historical, archaeological and archaeometallurgical studies, were employed to acquire the relevant information …
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'Phalaborwa where the hammer is heard': crafting together the political economy of Iron Age communities in southern Africa, AD 900-1900
… the political economy from the vantage point of production sites. This study addresses the position of metal producers in the regional political economy of Iron Age (AD 200 – 1900) communities in southern Africa through an in-depth analysis of one production locale, Shankare. Shankare is a …
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Forged in Fire: An anthracological investigation of woodland management and fuel selection for Iron Age metalworking at Culduthel, Invernesshire, UK
… (Scotland), housed a community of skilled metal, glass and enamel workers between 810-550 cal BC to cal AD 130-340. The scale and importance of metal production at the site is evidenced by its ten specialised workshops, nine smelting furnaces, and smithing hearths, which produced the …
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An investigation of heavy metal tolerance and reproduction in Nereis diversicolor with reference to their use for biomonitoring
Industrially-derived heavy metals are increasingly responsible for contamination of coastal and estuarine waters. All stages of metal production are sources of contamination, the main contributors being acidic mine drainage waters and smelting works. Other major sources are industrial water …
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The role of phytotechnology in the rehabilitation of the BHPBilliton Cannington Ag-Pb-Zn mine
… manage and remediate contaminants such as heavy metals, hydrocarbons, radionuclides and pesticides from soil and water. The use of in situ biological systems to rehabilitate large volumes of contaminated soil has enormous potential for application around the globe, particularly in the mining and …
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Development and Scale-Up of ‘The Bradford Process’ for the Production of Titanium and Titanium Alloys
… out on the “Bradford Process”; a method of metal production via calciothermic reduction of metal oxides, with unique pre-treatment step, to observe: scalability, alloy/part production potential, reaction mechanism and general process improvement. The research was primarily undertaken using …
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Early Agricultural Communities in Lejja Southeastern Nigeria: An Archaeobotanical Investigation
This thesis investigates food production and subsistence practices among early iron using communities in southeastern Nigeria. Lejja is a cluster of villages in Igboland, southeastern Nigeria where iron smelting flourished on an industrial scale from around the late first millennium BC. The huge …
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Development and preliminary numerical investigations of a dislocation density-based finite-strain rate-dependent elastoplasticity constitutive model
… and working hardening in face-centred cubic metals is well-researched, and the popular Kocks-Mecking model for average dislocation density evolution has been successfully implemented in small-strain elastoplasticity constitutive models. However, in contrast to other dislocation-based …
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Atom-by-atom designs of metal oxide catalysts for the oxygen evolution reaction
… (OER) holds great promise, as it enables the production of green chemicals, hydrogen gas, and pure metals electrolytically from their oxides, with oxygen as the sole byproduct. However, OER suffers from slow reaction kinetics and a lack of efficient artificial catalysts. In contrast, enzymes …
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Patterns of distal alteration zonation around Antamina Cu-Zn skarn and Uchucchacua Ag-base metal vein deposits, Peru : mineralogical, chemical and isotopic evidence for fluid composition, and infiltration, and implications for mineral exploration
… deposits are an important source of global base metal production that includes: Cu-Zn skarn, Zn-Pb-Ag carbonate replacement and Ag-base metal deposits. These deposits are located in multiple geological settings and are commonly associated with low-grade Cu-Mo calc-alkaline porphyry districts. …
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In the shadow of Elisabeth: a history of the battle for Bilston Iron and Steelworks, c. 1967-1980
… shut, thus ending two centuries of hot metal production in the Black Country, the onetime workshop of the world. The devastating closure of this profitable facility occurred despite a decade-long grassroots defence campaign spearheaded by local rank and file workers. Using previously …
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The continuity of status in Iron Age settlements through metallurgical craft specialisation and material wealth
… reflect status and the control and use of metal is embodied within the social system. On certain sites, this system continues into the Late Iron Age and although monumentality recedes, control of craft specialisation metalworking is sustained. The natural resources required in order to have …
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The Use of Coal for Ferrous Metallurgy in Roman Britain
… proven based on the analysis of iron production debris from a second-century CE blacksmithing workshop in Aldborough (Isurium Brigantum), Yorkshire, with confirmation from other Romano-British sites in Yorkshire, Lancashire, and Northumberland, including from Hadrian’s Wall. This …
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New Insights on the Evolutionary Mechanisms of Local and Distant Galaxies
… expand my analysis to investigating gas-phase metallicities and the real drivers of the mass-metallicity relation (MZR) and fundamental metallicity relation (FMR) on both resolved and global scales. I find evidence for a resolved version of the FMR and also that local metallicity depends on …
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Der Einfluss von Lagerstätteneigenschaften auf eine nachhaltige Rohstoffnutzung am Beispiel Kupfer
… resource availability and it requires efficient production and use of Earth materials. The demand of an efficient use of metallic raw materials leads to the question about the optimal exploitation of deposits. The availability of raw materials for the primary metal production depends on …
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Reuse of steel and aluminium without melting
… of current global steel and aluminium production to final products. A substantial catalogue has been compiled for these products characterizing key features of steel and aluminium components including design specifications, requirements in use, and current reuse patterns. To estimate …
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The impact of coal mining on the environment and community quality of life: a case study investigation of the impacts and conflicts associated with coal mining in the Mpumalanga Province, South Africa
… and steelmaking industries. The benefits of coal production are relevant in the light of South Africa's development priorities of job creation and economic growth. Even so, primary metal production and coal-based power generation industries, through their operations and activities, pose a …
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Developing a relationship between ore feed grade and flotation performance
… low-grade ores to meet the growing demand of metal production for our technologically driven future. A fundamental understanding of mineral processing is therefore critical for the optimisation of valuable mineral recoveries from such ores. The mineralogy of an ore determines its flotation …