Effects of ultrafine ground granulated blastfurnace slag. Pdf the use of high calcium wood ash in the preparation. The slag is also formed from any remaining silica sio 2, alumina al 2 o 3, magnesia mgo or calcia cao that entered with the iron ore, pellets, sinter or coke. Most of the impurities and fluxing agents combine to form a liquid silicate melt. Blast furnace slag bfs is a product of iron production, which has been widely investigated and utilized. Ground granulated blast furnace slag ggbfs is an industrial byproduct of the steel manufac ture. Pdf characterization of blast furnace slag for road. Blast furnace slag an overview sciencedirect topics. The liquid slag then trickles through the coke bed to the bottom of the furnace where it floats on top of the liquid iron since it is less dense. Request pdf ground granulated blast furnace slag ground granulated blast furnace slag ggbs is a byproduct from the blastfurnaces used to make iron.
Molten slag is channeled out of the furnace as liquid resembling molten lava by floating on the top of the molten iron and can be separated in the skimmer. The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Effects of ultrafine ground granulated blastfurnace slag on initial setting time, fluidity and rheological properties of cement pastes. The effect of chemical composition of blastfurnace slag on.
The use of high calcium wood ash in the preparation of ground granulated blast furnace slag and pulverized fly ash geopolymers. Ground granulated blast furnace slag request pdf researchgate. An overview of utilization of blast furnace and steelmaking slag in various applications. The present work focuses on mineral reactions and slag formation of lkab olivine iron ore pellets mpbo subjected to reducing conditions in the lkab experimental blast furnace ebf. In the furnace, hot metal along with slag is processed from the raw material which gets collected in the hearth and blast furnace gases come out of blast furnace from the top. Pdf blast furnace slag obtained from dry granulation method as a. The present study evaluated the potential use of blast furnace slag bfs as forming material of untreated granular layers in pavement e. The opening in the furnace hearth for casting or draining the furnace is called the iron notch 22.
Request pdf engineering properties of cementless concrete produced from ggbfs and recycled desulfurization slag this study used the byproducts of steel manufacturing, ground granulated blast. Surface of slag pit at the ford rouge river complex. Molten iron and liquid slag accumulate at the bottom of blast furnace, where the less dense molten slag forms a layer above the molten iron. Iron and steel slag can be roughly divided into blast furnace slag, which is. Among slags, the ground granulated blast furnace slag.
Mineral reactions and slag formation during reduction of olivine blast furnace pellets. The oxides of calcium and magnesium combine with silica and. They are related by both composition and morphology to the csh gels present in slagopc pastes but are more crystalline. How a blast furnace works introduction the purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Evaluation of ground granulated iron blastfurnace slag.
Properties and uses of iron and steel slags national slag. Use of aircooled blast furnace slag as coarse aggregate. Ground granulated blast furnace slag, for instance, is. An overview of utilization of blast furnace and steelmaking slag in. Olivine reactions during reduction in blast furnace pellets.
Sadekeffect of cooling technique of blast furnace slag on the thermal behavior of solid cement bricks. The impurities and slagging agents combine to form iron and steel ferrous. Currently, the use of grade120 granulated ground blast furnace slag ggbfs is incorporated into the specifications. Ground slag properties, characterisation and uses ccaa. Pdf the paper presents the results of experimental research that dealt with the substitution of fi nely ground blast furnace slag for portland cement. Granulated blast furnace slag has a cellular structure resulting from rapid quenching in water, is cementitious in nature, and sets to form a solid concretelike mass. The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom.
Chemical analyses of blastfurnace slags usually show that the four major oxides. Pdf blast furnace slag obtained from water quenching is generally used for. Mineral reactions and slag formation during reduction of. The characterization of hardened alkaliactivated blast. Standardization of iron and steel slag products nippon steel. In the blast furnace the slag floats on top of the iron and is decanted for separation. Pdf effect of ground granulated blast furnace slag as. The 10,000 simulations were merged to generate simulated. The ggbs in this work was commercially available ultrafine slag of two sizes v1 and v2, nitrogen bet surface area of v2 3955 m 2 kg. Ladle containing molten blast furnace slag being dumped into a cooling pit at the ford rouge river complex. Engineering properties of cementless concrete produced. Hydration mechanisms of activated blast furnace slag dora. Broadly speaking, therefore, the invention is based on an appreciation of the importance of slag control in the operation of a cokeless cupola furnace with the minimum of trouble, in particular without problems originating from a slag which is too viscous, yet at minimum cost, that is to say, low sphere consumption and low lining wear. In the case of pig iron production the flux consists mostly of a mixture of limestone and forsterite or in some cases dolomite.377 1176 420 813 510 956 1011 1454 914 1210 237 786 1281 382 1096 1294 462 160 640 789 514 53 30 652 848 816 621 384 586 1132 920 1288 411 1141 456 651 812