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A study of copper losses in slagsPhillips, Harry Ashwill January 1928 (has links)
No description available.
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The chemical and mineralogical forms of copper in converter slagBoyer, Walton Tully January 1927 (has links)
No description available.
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Effect of cooling rate on base metals recovery from copper smelting slag.Tshiongo, Nkhumeleni. January 2011 (has links)
M. Tech. Metallurgical Engineering. / Aims to recover base metals (Cu, Co, Pb and Zn) that are trapped in the slag produced during copper matte smelting process in a water jacket furnace by leaching of the slag and to study the effect of the cooling rate on the leaching of the metals in acidic and in basic media.
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Performance and Total PM Emission Factor Evaluation of Expendable AbrasivesKambham, Kalpalatha 22 May 2006 (has links)
Dry abrasive blasting is one of the most widely used methods of surface preparation. Air emissions from this process include particulate matter (PM) and metals. Spent abrasive generated from this process may be hazardous in nature. With increasing concern on health effects due to silica emissions from sand, use of alternative materials is suggested by health and regulatory agencies. The objective of this research was to evaluate performance of expendable abrasives and determine PM emission factors. Dry abrasive blasting was performed in an enclosed chamber and total PM samples were collected. Three commonly used expendable abrasives, coal slag, copper slag and specialty sand, were used to evaluate cleaner alternatives. Blast pressure and abrasive feed rate, two important process conditions were varied to study their effect on performance of an abrasive. Productivity, consumption and emission factors (performance parameters) were calculated and their variation with pressure and feed rate was evaluated. Two dimensional and three dimensional predicted models were developed to estimate the performance at intermediate blast pressure and feed rate conditions. Performance of the three abrasives was compared with respect to emission potential, productivity and consumption. Emission factors developed in this research will help in accurate estimation of total PM emissions and to select cleaner abrasives and optimum process conditions that will results in minimum emissions and reduced health risk. The productivity and consumption models will help is estimating life cycle costs including material cost, equipment cost, energy cost, labor costs, waste disposal cost, and compliance costs. Consumption models will also help in determining the quantity of spent abrasive generated, identify abrasives with lower material consumption, and identify process conditions that generate minimum spent abrasives. In addition, these models will help industries in making environmentally preferable purchasing (EPP), which results in pollution prevention and cost reduction.
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Undersökning av eventuell inverkan av järnsand på omgivande mark : Utvärdering av enstegslakning med 0,5 M HCl / Investigation of potential effects of granulated copper slag on the surrounding environment : Evaluation of a single leach using 0.5 M HClRitola, Linnea January 2017 (has links)
A disagreement has arisen between the localauthorities (Skellefteå kommun) and Boliden Mineral AB regarding the use of amaterial called
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Impact of curing methods on the strength of copper slag concreteKyalika, Cynthia Mumeka 10 1900 (has links)
The eco-friendly alternatives use is increasing momentum in a conscious effort
towards sustainability. In this regards, the relevance and the economic value of
using copper slag as a concrete aggregate are explored in this study in order to
contribute towards metallurgical waste recycling. Emphasis is placed on the
evaluation of the concretes strengthening prepared with copper slag contents and
produced under four curing methods: water immersion, water spraying, plastic
sheet covering and air-drying. In each curing case excluding for water immersion,
was duplicated in indoors (i.e. in the laboratory) and outdoor exposure (so was
prone to varying environmental conditions). This was specifically aimed at
capturing the effects of tropical weather conditions typical of the Lualaba province
in the Democratic Republic of Congo.
The control mix was designed to reach 25 MPa of compressive strength. Copper
slag was successively incorporated as sand replacement at the following mass
fractions: 20 %, 40 % and 60 %. Freshly mixed concrete samples were evaluated
for workability. Cube specimens were cast accordingly, cured for 28 days and then
tested for density and compressive strength.
Results indicated an increase in strength up to 20 % of replacement rate for all the
curing methods. Further additions resulted in reduction in the strength, but the rate
of reduction depended on curing conditions. The increase in strength was mainly
credited to the physical properties of copper slag that could have contributed to the
cohesion of the concrete matrix. It has been found that appropriate ways of curing
can still achieve greater results than that of the control mix since 80 % of humidity
is ensure. The two-way ANOVA test performed on the 28-days compressive
strength values confirmed the significant influence of the curing methods, of copper
slag content and the interaction between them. It has been found that considerable
influence is attributed to copper slag content and that warm environmental
conditions further extend the concrete strengthening. / College of Engineering, Science and Technology / M. Tech. (Chemical Engineering)
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Environmental Performance of Copper Slag and Barshot as AbrasivesPotana, Sandhya Naidu 20 May 2005 (has links)
The basic objective of this study was to evaluate the environmental performance of two abrasives Copper Slag and Barshot in terms of productivity (in terms of area cleaned- ft2/hr), consumption and or used-abrasive generation rate (of the abrasive- ton/2000ft2; lb/ft2) and particulate emissions (mg/ft2; mg/lb; lb/lb; lb/kg; lb/ton). This would help in evaluating the clean technologies for dry abrasive blasting and would help shipyards to optimize the productivity and minimize the emissions by choosing the best combinations reported in this study to their conditions appropriately. This project is a joint effort between the Gulf Coast Region Maritime technology Center (GCRMTC) and USEPA. It was undertaken to simulate actual blasting operations conducted at shipyards under enclosed, un-controlled conditions on plates similar to steel plates commonly blasted at shipyards.
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