Dry Slag Granulation – The Future Way to Granulate Blast Furnace Slag. Fleischanderl. Published 2018. Engineering, Materials Science. The design and erection for Phase 2 pilot-plant at the site of voestalpine Stahl in Linz has been fin ished in May 2017 followed by a intense commissioning phase. Since Ju ne 2017 discontinuous batch campaign ...
Since slag is rich in lime (CaO), silicic acid (SiO 2), phosphoric acid (P 2 O 5), magnesia (MgO), Mn, and Fe, these properties of the slag can be exploited to make use of fertilizer . Notably, steel-making slag and blast furnace slag have been extensively utilized as raw materials for fertilizer production, mostly in Japan, Korea, and China.
Figure 6. XRD patterns of the stainless steel slag particles before and after 16 h carbonation at a feed pressure of 2.0 MPa CO 2, 12% moisture, and temperatures of 60, 100 and 140°C. Note the lower intensities of the diffraction peaks of the Ca–Mg silicates (merwinite and bredigite) carbonated at 140°C.
Alkali-activated cement (AAC) is either clinker-less or free, and it is also environmentally friendly due to its low carbon footprint and wide range sources. Industrial wastes, like steel slag and blastfurnace slag, usually have latent hydraulic reactivity, and can be used as precursors of AAC. Both clinkerless and clinker-free AAC were prepared …
Steel slag (SS) is an industrial waste generated during the steel-making process. According to World Steel Association (2018), 170 kg of steel slag is produced per ton of crude …
Steel slag fertilizer was applied at a rate of 200 and 400 g m −2, which led to an increased yield of about 8% for the rice planted compared with the rice planted without the slag fertilizer application; this increase extended another 4% when the applied amount of slag was doubled (Gao et al., 2015). Steel slag, however, contains trace ...
Abstract. The current utilization rate of steel slag is only 22% in china, far behind the developed countries. At present, the amount of slag deposited in storage yard adds up to 30Mt, leading to the occupation of farm land and serious pollution to the environment. Improving the slag utilization is an important way to resolve these problems.
The work reported by So et al. was aimed at the application of air blasting to granulation of stainless-steel slag and suppress dust formation through dicalcium silicate phase transformation. The results of this pilot-scale work, granulating at about 30 kg/min, confirmed that formation of the "dusting phase" (γ-dicalcium silicate) in the ...
The steel slag produced during the ladle refining stage consists of calcium oxide (CaO) and magnesium oxide (MgO), contributing to 60 % of its weight. ... Fracture toughness was further enhanced by adding stainless steel fibers to the mixture. Sideris et al. 89 discovered that adding sand as an aggregate with LF slag improved SCC's …
The utilization of steel slag in cement includes mainly three modes [ 55 ]: matching the clinker of cement raw material, producing low-clinker steel slag cement, and being an active addition [ 55 ]. The process of making steel slag cement is a simple manufacturing technique with less investment and low cost.
The aim of this experimental study is to evaluate the tool life of each cutting material used in dry turning of X20Cr13 steel. The tests of straight turning were carried out using the following ...
The results demonstrated that the hydraulic properties of ladle metallurgy and argon oxygen decarburisation stainless steel slag were significantly improved after milling for 6 h, however, stainless steel slag still cannot be used as a single binder in industrial application. ... The dry-grinding steel slag (DGSS) and wet-grinding steel slag ...
Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed to be one of the available and reliable methods. By carbonation treatment …
Our dry slag granulation technology transforms molten slag from steel furnaces into granules using air stream, eliminating the need for water. The flexibility of the process …
Slags coming from stainless steel (SS) and ferrochromium (FeCr) production generally contain between 1 and 10% Cr, mostly present in entrapped metallic particles (Fe–Cr alloys) and in spinel structures. To recover Cr from these slags, magnetic and gravity separation techniques were tested for up-concentrating Cr in a fraction for …
Wu et al. (2016) synthesized and prepared stainless steel slag systems under different basicity conditions by using reagent powder. ... Take a certain amount of test coal samples and dry them in the air or nitrogen flow at 105–110 °C in the heating furnace until the mass is constant, and calculate the moisture mass fraction according to the ...
1. Introduction. Argon oxygen decarburization (AOD) slag, which is generated during the stainless-steel refining process, is a by-product of the steel industry (Li et al., 2017a).AOD slag is a kind of alkaline material characterized by a dominance of Ca-bearing silicate phases, and the minerals include γ-dicalcium silicate, fluorite and …
The slag sold as construction material comprises only less than 1.2 percent metal (measurement limit 0.5 mm), has a cubical grain shape and is earth-dry, thus satisfying the requirements of customers within the construction materials industry.An important aspect of the cost-benefit analysis is that there are no costs for water treatment.
Stainless steel slag has been applied to other silicate materials due to its CaO-SiO2-based system. This is done to improve the utilization rate of stainless steel slag and apply it more safely.
Commonly used alkali activation precursors such as blast furnace slag and fly ash will soon become less available due to resource competition, and may cease to be produced in certain regions. This limitation in future supply is a main driving force for the investigation of alternative precursor sources, such as non-blast furnace slags and non …
It is an extensively used ingredient in the production of stainless steel. On an average stainless steel production uses 66% nickel [126]. Some of the nickel used as an additive ends up in SS. Nickel recovery from SS has been studied with magnetic separation. During this process, both hand-magnet and dry high-intensity magnetic separation is used.
]; the cumulative content of stainless steel AOD slag particle sizes below 43.67 µ m is 86.56%, indicating that its potential activity is good. Materials 2024, 17, 970 4 of 17
AOD stainless steel slags " wet method " treatment process is divided into four steps：The first step is will to hold molten condition AOD stainless steels The slag pan (or tank, bucket) of slag is stood in an atmosphere, after heat loss to a certain extent after (slag temperature is fallen to a certain temperature), in fact Spraying cooling water …
Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties.
Steel slag, coal gangue, and slag were combined to create calcium feldspar-based all-solid waste ceramics by Xing et al. [109] at a steel slag doping of …
Impact crushing, which magnetizes stainless steel, has proven its value in routine operations. -Sonthofen has developed a cost-efficient process for new treatment …
This dry process developed by Loesche for recovering metals from steel slag combines all the advantages of conventional processes: Efficient and cost-effective metal recovery in the coarse range. Virtually metal recovery down to the finest fractions range by means of optimised dry grinding, classification and sorting technology.
The balance of oxides such as silica (SiO 2), calcium oxide (CaO), aluminum oxide (Al2O 3), and iron oxide (FeO) in steel slag is essential for the process efficiency and service life of the furnace refractory lining. With the use of an XRF measuring device steelmakers can ensure the correct balance of these oxides via frequent analysis and raw ...
