Granulated steelmaking dust with reducer (coal dust) was the input material. The products of the process are zinc oxide, iron alloy and slag, with properties meeting high ecological requirements. The technology does not generate solid waste. Zinc recovery is over 99% and iron recovery over 98%. The content of heavy metals (Zn + Pb + Cu) in ...Web
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Reutilize Copper Smelter Slag for ... pouring molten slag into water gives a granulated amorphous slag ... (Fig. 3, phase 1), while the fayalite (with a high content of aluminum and zinc) ...Web
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Abstract An intensified oxidative acid leaching of copper–cadmium-bearing slag featuring using high-efficient oxygen carrier, such as activated carbon, was investigated to achieve high leaching rate of valuable metals. The effects of leaching variables, including agitation rate, sulfuric acid concentration, temperature, slag particle size, activated …Web
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The process has been widely employed in lead smelters, to recover lead and zinc from molten blast furnace slag. Typically, these furnaces are operated in a batch mode although a continuous zinc fuming process was successfully utilised by KCM at their lead smelter in Bulgaria until 2016 . Primary limitations of the box fuming process include the ...Web
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Lead and lead–zinc slags are black to red in color and have glassy, sharp, and angular (cubical) particles. The unit weight of granulated lead and lead–zinc slags can vary from less than 2500 kg/m 3 (156 lb cf) to as high as 3600 kg/m 3 (225lb cf). Granulated lead slag is a black granular material having a high specific gravity of 2.65 to 3.79, due to the high …Web
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Large amounts of lead slag are produced during the production of primary lead and secondary lead. Considering lead concentrate smelting as an example, a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag (Hou, 2011).At the secondary lead recycling process, for each ton of metallic lead produced, 100–350 kg …Web
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Lead-zinc slag is a by-product produced during the smelting of Pb and Zn from their ores. This review study is conducted to evaluate the performance of using different types of lead-zinc slag as a construction material which addresses the problem of leaching and the conservation of natural resources. ... Effect of granulated lead smelter slag ...Web
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At the smelter, the waste slag was granulated and cooled quickly by spraying with water. The waste slag was verified to have a complex amorphous structure by X-ray analysis. ... (Pb, As, Cr, Cd, etc.), the disposal of non-ferrous metallurgical waste slag (NMWS), such as copper slag, lead slag, zinc slag and nickel slag, has attracted more …Web
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Three types of smelting slags originating from historically different smelting technologies in the Tsumeb area (Namibia) were studied: (i) slags from processing of carbonate/oxide ore in a Cu–Pb smelter (1907–1948), (ii) slags from Cu and Pb smelting of sulphide ores (1963–1970) and (iii) granulated Cu smelting slags (1980–2000). Bulk …Web
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For zinc smelting slag, the recoveries of zinc and lead were 94.5% and 97.6%, respectively, after reduction and volatilization procedure at 1050 °C for 6 h. (Hu et al., 2014). More than 95% of Zn and 80% of Pb was removed from zinc-bearing dust by carbothermic reduction at 1503 K with a C/O ratio of 1.0 (She et al., 2014).Web
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In the present paper, recovery of valuable metals from copper smelter slag of Balkhash copper plant (Kazakhstan) was investigated. To recover Fe, Zn and Cu to water-soluble form, the mixture of 150 g of copper slag and 60 g of 85% sulfuric acid was granulated and then roasted in the temperature range of 473–643 K (200–370 °C) …Web
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Lead smelting slag / lead smelter slag constitutes both the primary and secondary slags from the lead extraction industry [4], where the smelting of lead sulphide for the lead production process produces the primary lead slag [5]. The hazardous zinc smelting slag is generated from the metallurgical process of zinc extraction [6]. The …Web
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You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.Web
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The incoming and outgoing slag and the water-granulated slag were analyzed in a smelter laboratory with a standardized method that uses a Philips PW2606 X-ray fluorescence (XRF) instrument (Malvern Panalytical, Malvern, U.K.). ... (2013) Influence of alumina on mineralogy and environmental properties of zinc-copper smelting slags. Int …Web
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Journal of the Transportation Research Board, 2(2208), 1–8. Granulated nickel slag is essentially an angular, black, glassy slag "sand" with most particles in the size range of − 2 mm (No. 10 sieve) to + 0.150 mm (No. 100 sieve). It is more porous, with lower specific gravity and higher absorption, than air-cooled nicked slag.Web
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decreased as the proportion of smelter slag to replace fly ash binder increased. However, the compressive strength was always higher than 30 MPa. Similarly, Nath [7] added zinc slag into fly ash to improve strength. The results showed that toxic-metal leaching was within the permissible limit, and the strength of samples was up to 71 MPa with ...Web
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The recovery of iron from iron sinking slag and lead smelter slag was investigated by desulfurization-reduction bath smelting. The effects of lead smelter slag (LSS) to iron sinking slag (ISS) mass ratio and temperature were investigated in desulfurization experiments. The X-ray diffraction (XRD) and X-ray fluorescence (XRF) …Web
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More than 80% of copper is in the form of sulphides. Cobalt is finely disseminated in the slag matrix. Zinc is present as ferrites and silicates. Leaching of the slag. The leaching batch tests of ground . Sulphuric acid leaching of copper smelter slag. Leaching tests were carried out at pH 2.5 on ground slag samples (<100 μm).Web
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In the first set of experiments, raw slag (FFS) was used for paste backfill preparation and experimentation for uniaxial compressive strength (UCS) development, …Web
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Ratios of 25%, 50%, 75% and by weight of sand are used.The effects of granulated lead-zinc slag (GLZS) as sand replacement material on the compressive strength and gamma radiation attenuation ...Web
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Lead–zinc smelting slag (LZSS) is regarded as a hazardous waste containing heavy metals that poses a significant threat to the environment. LZSS is rich in aluminosilicate, …Web
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Recovery of metals from lead slag. The valuable metals in lead slag are mainly iron, and a small amount of zinc, lead. Various methods of recovering metals …Web
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Slag, a byproduct of metallurgical smelting processes, is a mixture of metal oxides, silicon dioxide, and different compounds [1,2,3,4,5].It is produced from raw ore combustion or the extraction of specific minerals from smelting materials [1,5].Huge quantities of slags (1868.8 million tonnes of global steel production in 2019–2020) are …Web
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In this study, a cleaner technique (reducing-matting smelting) was first proposed to co-treat lead paste and zinc leaching residues for recovering valuable metals. Zinc leaching slag provides the iron, silicon and calcium required for the slagging and provides ferrous oxide (FeO) as a sulfur-fixing agent.Web
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Copper/lead/zinc slag (CLZS) Formed from the smelting of ores, it is generally granulated to form a sand size product with a top size of about 5 mm, with only a small quantity of material below 1 mm. ... Copper slags carry small amounts of the metals that were present in the original ores and smelter concentrates . The purpose of the …Web
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Lead-zinc slag is a by-product produced during the smelting of Pb and Zn from their ores. This review study is conducted to evaluate the performance of using …Web
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A copper smelter slag from Lubumbashi, Democratic Republic of Congo, containing 1.4% Cu, 0.7% Co, 8.9% Zn and 20.9% Fe(II), has been used in this study. ... cobalt and zinc were produced, so that pulp filtration could be easily carried out. ... Base metals recovery from granulated copper slag by digestion method. Proceedings of the …Web
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It was found that the slump value of the GPC by using FA as a binder and partial replacement of washed river sand with granulated lead smelter slag (GLSS) shows slump value increases with ...Web
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Lead-Zinc Smelting Slag (LZSS) is an industrial waste produced during the smelting of lead (Pb) and zinc (Zn) from their ores. It is considered hazardous waste as to it contains …Web
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slag, the cleaning would have to be carried out of1350°C. For example, slag treated at 1150°C still contained 0.5% Cu and 2.5% Zn, but treatment at 1350°C resulted in slags containing only 0.3% Cu and less than 1.5% Zn. The tests that compared the use of fine coke breeze versus granulated (8 mesh) coke showed that the breeze wasWeb
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Granulated lead–zinc slag is a by-product obtained during smelting of lead and zinc ore to separate the metal fraction from the unwanted fractions. ... Effect of granulated lead smelter slag on strength of fly ash-based geopolymer concrete. Construction and Building Materials, Volume 83, 2015, pp. 128-135.Web
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Zinc slag (including zinc smelting slag and zinc leach residue) belongs to solid waste from the zinc pyrometallurgical and hydrometallurgical industry. Generated …Web
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Slag, a byproduct of metallurgical smelting processes, is a mixture of metal oxides, silicon dioxide, and different compounds [1,2,3,4,5].It is produced from raw ore combustion or the extraction of specific minerals from smelting materials [1,5].Huge quantities of slags (1868.8 million tonnes of global steel production in 2019–2020) are …Web
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