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ENERGY EXPLORATION EXPLOITATION· Volume 32 · Number 3 · 2014 pp. 471–482 471 Characterization of slag from combustion of pulverized lignite with high calcium content in utility boiler P. Pintana1, N. Tippayawong1*, A. Nuntaphun2 and P. Thongchiew2 1Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, .
Results from column experiments using modern slag (AMFeC) and legacy slag (ILSS5) from the ChicagoGary area, Illinois and Indiana. (a) Percent phosphate (PO4) retained versus pore volume.
Mar 18, 2020· Boron oxide is frequently applied in modification of stainless steelmaking slag to mitigate the disintegration of slag. In this work, the effect of B2O3 on mineralogical phases and hexavalent chromium leaching behavior of synthetic CaO–SiO2–MgO–Al2O3–CrOx slag was investigated. Dicalcium silicate, merwinite, spinel, akermanite, and matrix phase were observed as main minerals in .
Sample preparation and tests conducted TOP. Alkaliactivated slag pastes were formulated with an activator dose of 5 g Na 2 O per 100 g slag, and a water to binder (free water + water in the activator)/(anhydrous activator + slag) ratio of The paste was cast in cylindrical molds of 30 mm diameter ×60 mm height, sealed, and cured under ambient conditions (temperature 25 °C and ...
The reaction of gehlenite, quartz, and periclase generates akermanite. 2 These two Caspecies are fluxing materials and can enhance ash deposition. 10,29. To better understand the slag formation in the furnace, Fig. 7 shows the mineral compositions of slags at different bed temperatures. At the bed temperatures of 820 °C and 870 °C, there is ...
Loss of flowability or formation of lumps of cement during storage. Can be due to cement hydration from water in gypsum added during grinding, or to syngenite formation. Åkermanite, Akermanite Calcium magnesium silicate (C 2MS 2 or 2). Not generally present in Portland cement; may be present as a minor component in slag.
like Akermanite Ca 2Mg(Si 2O 7), hydrotalcite Mg 6Al 2(CO 3)(OH) 16, calcite CaCO 3 and αSiO 2 Quartz traces. The data shows the formation of CSH due to the alkaline activation of the slag in all the pastes mixtures. The slag in the pastes mixtures is the component capable to produce CSH gel because the glass waste has not the calcium content
akermanite 3CaO·MgO·2SiO 2. The only crystalline compound in slow cooled slag which has cementitious properties is β2CaO·SiO 2. Thus crystallized blast furnace slag has little or no value as a cementing component. Crushed BF slag for use as aggregate, ballast and lightweight building material has been an important industry for many years.
Ironmaking slag has 4045% CaO, 3040% SiO 2, ... These processes result in the formation of monticellite, akermanite, melilite, tilleyite, spurrite, rankinite, merwinite and larnite. The ...
ENERGY EXPLORATION EXPLOITATION· Volume 32 · Number 3 · 2014 pp. 471–482 471 Characterization of slag from combustion of pulverized lignite with high calcium content in utility boiler P. Pintana1, N. Tippayawong1*, A. Nuntaphun2 and P. Thongchiew2 1Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
Viscous slag descended together with the reduced iron towards hearth. Micrographs of single phases will illustrate the whole process from the initial formation of iron sponge to the flow of slag and reduced iron into the zone of sintering or welding, respectively, in the reactor hearth. Further, slag phase compositions that are formed in
While the slag of the city carried the chemical signature of a typical Roman slag with elevated iron and silica values, the slag from Bey Dağlari showed an elevated titanium, vanadium, and zirconium content (Degryse et al. 2003a). At Dereköy, slag and furnace material were found in association with a spinel placer deposit.
Feb 01, 2013· Akermanite is a common mineral found in steel slag from the production of carbon and stainless steel (Tossavainen et al., 2006, Engström et al., 2010). The crystal structure of akermanite is known to be tetragonalscalenohedral (, 2012).
Aug 07, 2015· The slag is to have capacity for the removal of the alkalis, It is to fulfil the requirements for the desulphurisation. The composition of the primary slag must be uniform. Slag formation is to be confined to a limited height of the blast furnace and the slag must be stable. The slag is to provide good permeability in the zone of slag formation.
Öveçoǧlu, Microstructural characterization and physical properties of a slagbased glassceramic crystallized at 950 and 1100 °c, Journal of the European Ceramic Society, /S(97)000940, 18, 2, (161168), (1998).
Sep 01, 2017· The DTA is identified as a quick test to get a first impression of the crystallization behavior of a slag. A relationship between the forming of crystals inside a slag and its temperature of critical viscosity is confirmed in this study. Especially gehlenite and akermanite have a major impact on the rheological behavior of the analyzed slags.
tion of the slag and solidification conditions in which it often gives rise to the formation of unbalanced states [3]. A ladle slag usually contains dicalcium silicate, merwinite, periklase, brownmillerite, akermanite, anorthite, mellilite and other minerals, given in the Table 2. Table 2 Phase composition of ladle slags Slag Phase composition
Jun 29, 2020· The mixing method is the investigation of the characteristics of alkaliactivated cement paste (AACP) with slag and silica fume (SF) of 1: 1. The basic mixing method is ASTM C305, which is defined as 1stcycle. There are three factors considered in this experiment; (i) the addition of mixing time (2ndcycle), (ii) the concentration of activator depending on the amount of mixing water, and (iii ...
The production of one ton of crude iron is accompanied by the formation of 400 to 650 kg of slag [2] . Earlier, up to 148 million tons of steel was melted annually in our country, 107 million tons of crude iron was melted in 1980, and 107 million tons of rolled metal was melted in 1980 and, hence, no less than 60 million tons of slag was ...
The results showed that akermanite scaffolds possessed –% of porosity, with a corresponding compressive strength between 1130 and 530 kPa. The weight loss of the scaffolds and ionic content of the Ringer''s solution increased with the increase in soaking time, indicating the degradability of scaffolds.
This paper presents a characterization analysis of alkaliactivated steel slag. The effect ratio of steel slag and ferronickel slag which are the precursor materials on the compressive strength of the alkaliactivated materials was investigated. The combination of sodium hydroxide solution of 15 moles concentration and sodium silicate was used as an alkaline activator.
Slag – air VFT 25 1/s VFT 50 1/s 25 1/s 50 1/s XRD Solid Gehlenite Ca2Al2SiO7 Akermanite Ca2Mg1Si2O7 Results XRD 8th International Freiberg Conference, 12 – 16 June 2016 14/21 • Viscosites diverge between 1370 and 1390°C and show a growing trend XRD confirm crystals at 1350 °C Gehlenite and small portions of akermanite are found
amorphous) of blast furnace slag. The comparative analysis of adsorption and XRD data showed that the formation in slag of melililite crystal phases (gehlenite and åkermanite) and merwinite results in an almost double increase of Cu (II) adsorption, compared to amorphous slag. The addition of Al 2 O 3 alone and in combination with MgO leads to
Slagleaching Experiment. In general, the test method used for determining the amount of chemical materials eluted from slags is JISK00581, 12) where fixed amounts of crashed samples below 2 mm diameter are mixed with 10 times water and the mixture is shaken in 200 times per minute for 6 hours to dissolve the materials. The purpose of this study was to investigate the formation .
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