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Blast Cleaning and Other Heavy Surface Pretreatments
Published in Ole Øystein Knudsen, Amy Forsgren, Corrosion Control Through Organic Coatings, 2017
Ole Øystein Knudsen, Amy Forsgren
Copper slag is a mixture of calcium ferrisilicate and iron orthosilicate. A by-product of the smelting and quenching processes in copper refining, the low material cost and good cutting ability of copper slag make it one of the most economical, expendable abrasives available. It is used in many industries, including major shipyards, oil and gas companies, steel fabricators, tank builders, pressure vessel fabricators, chemical process industries, and offshore yards. Copper slag is suitable for removing mill scale, rust, and old paint. Its efficiency is comparable to that of silica sand [2]. It has a slight tendency to embed in mild steel [3].
Engineering uses of some ‘waste’ products: The Australian experience
Published in R. N. Chowdhury, Geomechanics and Water Engineering in Environmental Management, 2017
Copper slag is formed as a co-product of the refinement of copper ores in a blast furnace. The molten slag can be treated in similar fashion to iron blast furnace slag, namely, slow cooling in air to form copper rock slag or quenching in high volume, high pressure water sprays to form granulated slag. Copper slags have been used in mine backfill where approximately 50% of Portland cement is replaced by ground granulated copper slag (Thomas, 1971). Other applications have included land reclammation and as an abrasive blast cleaning material for the removal of heavy mill scale from steel plates, with particular application in the ship building industry.
Experimental investigation on utilisation of bamboo fibre and bamboo stem ash in mortar as a sustainable material
Published in Australian Journal of Civil Engineering, 2022
There is scarcity of adequate river sand in most parts of the world due to overexploitation in the river beds (Devadass 2019; Mansi and Jayesh 2018). This condition led to use of alternative material to replace the natural sand. Copper slag is one the best alternative source to replace the conventional fine aggregate (River Sand). It is the by-product obtained during the copper extraction process. While smelting, all impurities transform as slag and floats. The increase in the quantity of copper slag will increase the workability of concrete due to its higher coarseness and creates only less damage to the sustainable environment when compared with river sand. The experimental results indicated the marginal increase in the density with increase in copper slag content. The compressive strength got increased up to 70% for the replacement of river sand by copper slag to 50% while compared with the control mix. The substitution of sand with copper slag up to 40–50% obtained the significant compressive strength compared with the conventional mixture (Al-Jabri, Al-Saidy, and Taha 2011).
Investigating the indirect tensile stiffness, toughness and fatigue life of hot mix asphalt containing copper slag powder
Published in International Journal of Pavement Engineering, 2019
Amir Modarres, Peyman Alinia Bengar
Slags are produced when metals are extracted from ores. Copper slag is one of such material which is produced during smelting and converting steps of copper production. It has been estimated that for every ton of copper production about 2.2 ton slag is generated Gorai et al. (2003). Slags containing less than 0.8% copper are usually discarded as waste in slag dumps or stockpiles. Dumping or disposal of this slag leads to several environmental issues such as land occupation, leakage of pollutants into groundwater, dust spread, air pollution, landscape impact and land use limitations. Figure 1 shows the copper slag dumps located in Garmsar copper smelter, Semnan province, Iran. The existence of these dumps can bring about several risks to the surrounding environment, particularly contaminating of groundwater resources. For instance, excessive heavy metals concentration in copper slag certainly increases the risk of respiratory and cancer disease by contaminating the groundwater resources. Many countries have developed specific regulations for the systematic reuse of wastes and byproducts, thereby reducing the demand for natural resources (De Almeida et al. 2012; Modarres and Ayar 2014).
Effect of copper slag on performance of warm mix asphalt
Published in International Journal of Pavement Engineering, 2019
Hassan Ziari, Ali Moniri, Reza Imaninasab, Mostafa Nakhaei
Copper Slag is a by-product obtained during the matte smelting and refining of copper (Khanzadi and Behnood 2009). Copper slag is made up of iron, aluminium, calcium oxide, silica and is preliminary used to separate the metal and non-metal constituents that bulk ore contains (Hassan and Al-Jabri 2010). Each ton of copper generates approximately 2.2–3 tons of copper slag. A substantial amount of copper slag is produced in the world each year. In the U.S and Japan, four million and two million tons of copper slag, respectively, are produced per year. About 360,000 and 244,000 tons of copper slag per year is also reported in Iran and Brazil, respectively (Khanzadi and Behnood 2009). There are three alternatives to manage such huge amounts:Reusing it as raw material to recover copper and other metals.Using it as abrasive tools, roofing granules, cutting tools, abrasive, tiles, glass, road-base construction, railroad ballast, asphalt pavements and cement and concrete industries.Dumping it as disposal material in stockpiles near the company which produces them.