To improve the efficiency of iron recovery from steel slag and reduce the wear-and-tear on facilities, a new method was proposed by adding a secondary screen sizer to the magnetic separation process according to grain size distribution of magnetic iron (M-Fe) in the slag. The final recycling efficiency was evaluated by calculating the percentage of recycled M-Fe to the maximum amount of M-Fe that
Download Citation Studies of the Recovery of Iron Content from Iron and Steel-Making Slags by Magnetic Separation Although slag has an enough potential as the secondary resources due to its
28.07.2016· Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to replace high-cost steel scrap and iron ores. However, current slag processing is far away from optimum conditions, especially for slag fines with small particle sizes, resulting in generation of nonrecyclable
of Iron Slag at Snorup 14 May 1996 prepared for: Olfert Voss Nationalmuseet Frederiksholms Kanal 12 DK-1220 Copenhagen K Denmark by: Bruce Bevan and
steel making slag iron magnetic field intensity in us. Comprehensive utilization and discussion of Iron and steel . Sep 10, 2013 multiple stage crushing process. Through magnetic separation, slag and steel's iron grade average in more than 55%. Used for flux in the iron making.
A by-product of the iron-making process, blastfurnace slags result from the fusion of fluxing stone (limestone or dolomite) with gangue (siliceous and aluminous) residues from the iron ore and coke ash. 302,303 The chemical composition is dominated by lime, silica and alumina (Table 15.16), with smaller amounts of magnesia, sulfur and iron.
Exposed to a strong magnetic field, any piece of iron can be magnetized. metals, which are used to enhance the properties (strength, resistance to corrosion, Slag is lighter than molten iron ore, so it rises to the surface and can easily be removed. into molds to produce pig iron
steelmaking slag iron magnetic field intensity Gulin Solutions steelmaking slag iron magnetic field intensity. Nov 27, 2012 Gulin supply Mining and construction equipment for mineral handling. The crushing, screening, washing steelmaking slag iron magnetic field intensity in US Basalt MOBILE CRUSHER Mobile Crusher Introduction. Mobile crusher also named protable crusher is a
After magnetic separation, the slag was weighted and subjected to chemical analysis. 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 01234 Heat Number % w t S a g (S la g/Tota l Me ta llic Charge) S-110 Normal Level Figure 3: Amount of Slag Collected as a Function of the Number of Heats Following Ductile Iron Production. Results and Discussion Table 4 Metallic Charge Composition. Slag Formation with HPI
Historically, the re-smelting of iron ore slag was common practice, as improved smelting techniques permitted greater iron yields—in some cases exceeding that which was originally achieved. During the early 20th century, iron ore slag was also ground to a powder and used to make agate glass, also known as slag glass. Modern uses. Ground granulated slag is often used in concrete in
Semi-Smelting Reduction and Magnetic Separation for the Recovery of Iron and Alumina Slag from Iron Rich Bauxite Yingyi Zhang 1,2,*, Qiangjian Gao 3,*, Jie Zhao 1, Mingyang Li 1 and Yuanhong Qi 4 1 School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243002, China; [email protected] (J.Z.); [email protected] (M.L.) 2 College of Material Science and
This work presents a semi-smelting reduction and magnetic separation process for the recovery of iron and alumina slag from iron rich bauxite ore. The effect of the process parameters on the recovery rate of iron, maximum particle size of the iron nugget, and the Al2O3 content of the alumina slag was investigated and optimized. The results show that the iron nuggets and alumina slag can be obtained
Ancient iron production refers to iron working in times from prehistory to the early Middle Ages where knowledge of production processes is derived from archaeological investigation. Slag, the byproduct of iron-working processes such as smelting or smithing, is left at the iron-working site rather than being moved away with the product.It also weathers well and hence it is readily available
The magnetic iron in the copper slag gradually transformed to fayalite, and the viscosity of the copper molten slag decreased as the magnetic iron content decreased during the reduction process.
containing iron in blast furnace slag . This method applies a magnet to collect the metallic iron particles. Obviously, this method only provides the approximate result, due to the metallic particles often being imbedded in non-metallic particles for the iron-making or steel-making slags. Another method uses mercuric chloride to extract metallic iron from slag . However, a protective film is formed on the
Two by-products, slag and gas, are also formed. Slag leaves the furnace by the same taphole as the iron (upon which it floats), and its composition generally lies in the range of 30–40 percent silica (SiO 2), 5–15 percent alumina (Al 2 O 3), 35–45 percent lime (CaO), and 5–15 percent magnesia (MgO).
To recover the metals from steel slag, two types of BOF slags were remelted at 1873 K. The liquid slags were cooled using four types of cooling conditions, namely, water granulation, splashing, air cooling, and furnace cooling, to investigate the influence of cooling rate on mineral components, especially the enrichment behavior of Fe‐containing minerals. Subsequently, wet magnetic separation was
Melter Slag (MS) Brief Description . Melter Slag is a co-product of the steel making process that converts iron sand to iron by adding coal and limestone. Melter slag differs from other slags in that the major oxides (calcium oxide and magnesium oxide) do not occur in their free form in the slag. Unlike conventional blast furnace slag (BFS), the iron sand-based material can not be granulated, which
Iron and steel slag refers to the type of metal manufacturing slag that is generated during the process of manufacturing iron and steel products. The term "slag" originally referred to slag produced by metal manufacturing processes, however it is now also used to describe slag that originates from molten waste material when trash and other substances are disposed of at an incinerator facility.
Solid state oxidation achieved overall optimum results when roasted at 900 °C for 1 hour, and magnetically separated under 110 mT. Two products were collected. An iron-rich concentrate containing 28% Fe, 3.9% Mn and an iron-lean tailing containing 7% Fe and 0.4% Mn.