With respect to the mechanical properties, durability and thermal behavior, ground-granulated blast-furnace slag (GGBS) delineates a rational way to develop sustainable cement and concrete. …
Slag cement is also called blast furnace cement, pbfc cement (Portland blast furnace cement). It is composed of Portland cement clinker, 20%-70% granulated blast furnace slag, and appropriate gypsum. AGICO CEMENT helps you get full knowledge of blast furnace slag cement and provides a one stop solution for your cement plant.
distribution of the blast furnace slag liquid film during the centrifugal granulation process of the rotary cup. Therefore, this paper uses the VOF method in the CFD software to establish a rotary cup model, and discusses the influence of the slag flow rate and cup structure on the thickness of the liquid film. 2 Models and methods
This process involved pouring molten blast furnace slag onto a rotary drum which caused the slag to be broken into droplets. These droplets were collected and mixed with sand and cooled to solidification by air in a fluidized bed. ... The granulated blast furnace slag produced by the pilot plants at CSIRO was over 98% glassy and denser …
Blast furnace slag is a by-product of blast furnace (BF) ironmaking produce. Every pig iron production is accompany by 0.3 ~ 0.6 tons of blast furnace slag produced with the temperature of 1350 ć ~1450 ć (1600~1 800 MJ sensible heat, equivalent to 55~61kg standard coal combustion after the heat generated). On this basis, the BF slag is up to ...
Blast furnace slag (BFS) is the main by-product of iron making and is produced in large amounts worldwide. To improve energy use, it is necessary to understand the thermal behaviour of slags under differing compositions at varying temperatures. This study determines the thermal properties and behaviour of selected slag samples using …
Blast furnace (BF) slag, which is the main byproduct in the ironmaking process, contains large amounts of sensible heat. To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with obtained hot BF slag particle—was proposed in …
Reading time: 3 minutes. Blast furnace slag cement is the mixture of ordinary Portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement. Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious properties.
1. Introduction. Blast furnace slag is one type of solid waste generated by the iron-making process, which is discharged at temperatures ranging from 1450 °C to 1650 °C.In China, there was approximately 0.197 billion tons of slag discharged in 2012, the thermal energy of which is equivalent to the energy contained in 11.5 million tons of coal.
The Blast furnace (BF) can be operated with 22% Al 2 O 3 slag without the use of an external fluidizer if the slag basicity is kept at 1.0 and the MgO content is kept at 12.5% [102]. For slag ...
Blast furnace slag (BFS) is one of metallurgical solid waste (Peng et al., ... Experimental study on the production of hot blast using hot blast furnace slag as heat carrier in rotary kiln heat transfer. Energy for Metallurgical Industry, 32 (2013), pp. 33-35, 10.3969/j.issn.1001-1617.2013.04.008.
Blast furnace slag is a by-product of the iron-making process while producing pig iron. The present research provides an understanding of the two different types of slags of water quenched granulated slag and air-cooled slag that are generated from iron making process through the blast furnace route. The chemical, mineralogical, …
The Sierraleone ore has high alumina content (about 7.0 mass pct) and low silica content (about 1.7 mass pct). Figure 1 clearly shows that the slag composition and volume have undergone drastic modifications compared with the other raw materials. If the high Al 2 O 3 ore is extensively used in a blast furnace (BF), great deviation will form …
The water quenching granulation process, also known as the wet treatment process, is a process that uses a high-pressure water stream to quickly cool the blast fur-nace slag in …
ortion of particles greater than 45 lm.The Blaine surface area of granulated blast furnace slag ranges between 4000 and 6000 cm2/g in order to obtain satisf. pment in concrete.Chemical CompositionDepending on the sources of iron ore, the limestone flux composition, and the coke composition, the chemica.
We studied the effects of the blast air volume flow rate on the average slag particle diameter, mass fractions of slag wool, and slag block under different granulator …
Slag Granulation. Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a value added product for the cement industry, using granulated slag sand as CO2-friendly …
11.3.2.2 Self-packing concrete. LF slag was used as filler in a laboratory study with steel fibers as reinforcement to make self-compacting concrete mixtures. Different contents of LF slag filler, ranging from 60 to 120 kg/m 3, and steel fibers, ranging from 0% to 0.7%, were used. The test results showed that LF slag can be used as filler for ...
Blast-furnace slag and its derivative GGBS are examples of industrial byproducts that are primarily utilized as supplemental cementitious products in cement and concrete production. Its self-hydration feature, in addition to its pozzolanic action, distinguishes it from other compounds, which might be due to the presence of 30–40% …
If the sensible heats of the reformed gas and the slag after steam reforming reactions were unrecycled, the required mass of blast furnace slag was over 30 times of bio-oil mass, while the ...
12.1. Introduction. Blast furnace slag (BFS) which is defined "as the non-metallic product consisting essentially of silicates and alumina silicates of calcium and other bases, that is developed in a molten condition simultaneously with iron in a blast furnace" by ASTM C 125-16 (2016) has been widely used in construction industry for more than …
The furnace is operated by unskilled workers who charge the furnace, smelt it for a predetermined period, and tap the furnace bullion and slag. Rotary furnaces are commonly used in the production of non-ferrous metals such as copper, lead, and aluminum.
The synthetic slag composition was chosen to resemble a simplified feedstock composition of a secondary lead blast furnace, i.e. a blast furnace using secondary resources rather than ore. In particular, the emphasis is put on a furnace that uses a slag that stems from an oxidative process (such as a copper smelter) as its main …
1. Introduction. Molten blast furnace (BF) slag is one of the main by-products in the iron-making process, and has a yield of 300 kg/t-pig iron [1].The heat contained in molten BF slag (1500 °C) reaches up to 1600 MJ/t.Globally, the production of pig iron was nearly 1153 million t in 2015 [2], and about 345.6 million t of BF slag were produced.The …
The slag fluidity in a blast furnace affects softening-melting behaviour in the cohesive zone, permeability in the lower part of a furnace due to liquid hold-up in the dripping zone, liquid flow in the furnace hearth, and the ability of the drainage of the slag through the tap hole. It also affects its desulphurization ability.
The slag composition changes as it descends in the furnace due to the absorption of the coke ash and coal ash, sulphur and silicon from the gas, and the reduction of the iron oxide. The temperature of the slag increases of the order of 500 deg C as it descends to the tuyere elevation.
The formation process of blast furnace slag is mainly divided into three steps: primary slag, intermediate slag, and tapped slag. (1) Primary slag. It is formed along the top edge of cohesive zone and starts to drip when flowing to the lower edge of cohesive zone. The formation of primary slag includes solid-state reaction, softening, melting ...
They accordingly introduced fluorite tailings (60%) into blast furnace slag (40%) to form a parent glass ceramic with increased silica and CaF2 content which in turn resulted in better formation of diopside phase, in addition to superior mechanical and physical properties (2.41 g.cm-3 density, 0.3% open porosity and 7.36 GPa Vickers …
of early strength [14,15]. Given the shared metallurgical lineage between steel slag and ground granulated blast furnace slag (GBFS), the former is being considered for cotreatment with the latter to improve its performance as a cementitious material. The main phase of GBFS is amorphous and has high reactivity. When steel …
