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P. Chindaprasirt, T. Cao, in Eco-Efficient Masonry Bricks and Blocks, 2015. 8.3.1 Ground granulated blast furnace slag concrete block. Granulated blast furnace slag is the glassy material formed by water quenching of molten slag discharged from the blast furnaces in the iron-making industry. The water quenching process is termed granulation and its product, granulated blast furnace slag, is ...
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Dry granulation, as a new process for molten blast furnace slag treatment, is an attractive alternative to water quenching. In this study, the performance of dry granulation slag in slag …
Blast furnace slag (BF slag) is a byproduct from blast furnace exhaust temperature of 1450℃ or so, is a high-quality waste heat resources. In China, the steel industry produces approximately 220Mt of BFS per year, and the enthalpy of those slags is approximately equivalent to 13.3% of the whole energy consumption in the ironmaking process.
2019-1-2 · By converting low value slow cooled blast furnace slag into a high value material for the cement/construction industry, this process turns a waste product into wealth. We are currently negotiating with international engineering companies to commercialise the dry slag granulation technology.
Blast furnace slag is known as a by-product from the production of hot metal at integrated steel and iron mills. Approximately 300 kg of this liquid slag with a temperature of about 1500°C is tapped together with each ton hot metal. This results in a worldwide annual production of about 400 million tons of blast furnace slag.
The molten blast furnace slag (BF slag) is discharged at the temperature of about 1400-1550 °C, which contains a large amount of heat. At present, water quenching is the main technology to treat the BF slag, but this method not only consumes a huge amount of water, but also fails to recover the waste heat. Compared with water quenching, the dry centrifugal granulation has obvious advantages.
Three types of BF slag quenching dry granulation process including drum granulation,air blast granulation and centrifugal granulation(rotary cup atomizer),which have been ...
The difficulties of molten metallurgical slag(including blast furnace slag and steel slag,etc.) heat recovery caused by low thermal conductivity and high enthalpy are analyzed ...
2019-6-15 · Blast Furnace Slag is formed when iron ore or iron pellets, coke and a flux (either limestone or dolomite) are melted together in a blast furnace.When the metallurgical smelting process is complete, the lime in the flux has been chemically combined with the aluminates and silicates of the ore and coke ash to form a non-metallic product called blast furnace slag.
Primetals Technologies has provided blast furnace engineering, project excellence and expertise to customers world-wide for over a century. Our technology base covers the entire blast furnace process route from hot blast and raw material handling, through the furnace and casthouse, to gas cleaning and hot metal / slag processing.
US4374645A Process for granulation of slag Google Patents. The granulation of molten material, blast furnace slag for example, is accomplished by wetting the slag with a stream of water and thereafter transporting the thus formed granules away from the point of granulation with the water stream.
2016-12-7 · Converting Granulated Blast Furnace Slag into Fine Aggregate 95 slags can be increased by optimizing granulation parameters such as water temperature and flow rate to produce slag sand similar to river sand. Based on this concept, several trials were conducted at blast furnace slag granulation
Blast Furnace Slag - Material Description ORIGIN In the production of iron, iron ore, iron scrap, and fluxes (limestone and/or dolomite) are charged into a blast furnace along with coke for fuel. The coke is combusted to produce carbon monoxide, which reduces the iron ore to a molten iron product.
Moisture in blast furnace slag, which occurs in the granulation process or in pelletized slag, should be removed by drying prior to the use of GGBFS as either an additive to Portland cement or a mineral admixture to Portland cement concrete. Grinding
2019-1-24 · is a 10 MTPA Integrated steel plant. At present four numbers blast furnace is installed in this plant. BLAST FURNACE #1 having a capacity of 0.9 MTPA, BF#2 -1.6 MTPA, BF#3-3 MTPA and BF#4-3 MTPA. In the process of iron making, slag is a by product of blast furnace operation. Presently slag granulated and disposing to the ground nearby blast furnace
NEW PROCESS FOR DRY GRANULATION AND RECOVERY OF HEAT FROM MOLTEN SLAG Essentially, the process is to atomize the molten slag and then to cool the particles rapidly so as to produce a glassy slag. The atomization is done using a rotary-cup, air-blast atomizer.
2016-12-5 · Keywords: dry granulation, slag, spinning disc, CFD, modelling, simulation Slags generated in metallurgical industry are high volume by-products or wastes containing a large amount of heat. In blast furnace ironmaking, for example, for every tonne of hot metal produced, about 300 kg of slag …
slag granulation process pdf - firewagonmediacoza. slag granulation process pdf - sirptsciencecollegeorg Baosteel: Steelmaking slag treatment saves space, dust, Steelmaking slag is an inevitable by-product from the steelmaking process, , and, due to their slow static cooling and granulation ,...
2019-6-12 · Ground Granulated Blast-furnace Slag (GGBS) Lafarge Emirates' GGBS is a premium quality, supplementary cementitious material that can be combined with cement to produce concrete having several advantages namely reduced heat evolution, enhanced durability, better workability, delayed setting, etc.
2009-8-26 · Dry granulation of titania slag Description and operation of the dry granulation plant Dry granulation of titania slag was carried out at the 500 kW DC furnace on site. In this instance compressed air was used as granulation medium. Two rectangular guide plates placed on the slag taphole side of the furnace channelled
Formed from liquid blast furnace slag, it is a by-product of hot metal production in blast furnaces and thus of the steel manufacturing process. 65 % of all the steel manufactured worldwide comes from the blast furnace/LD converter while only 35 % is produced by the electric furnace process.
Kingfisher’s Wear Resistant Ceramic lining systems extend the lifetime of slag granulation components. Production of blast furnace generates large amounts of liquid slag and can be processed into valuable raw materials known as ground granulated blast furnace slag (GGBS).
Experimental results on the dry slag granulator pilot plant have demonstrated that the process can effectively produce glassy slag granules from molten iron blast furnace slag, and recover significant heat, and that the CFD model can be used to predict process performance.
2017-2-24 · Abstract: As a valuable byproduct of iron-making process, blast furnace slag contains tremendous amount of sensible heat. Granulation of blast furnace slag is the first step for its heat recovery. Due to environmental and energy issues, dry centrifugal granulation has received a considerable amount of attention.
Blast Furnace Slag Granulation / Ironmaking / Our ... blast furnace slag granulation Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a saleable product (granulated slag sand used as CO 2 -friendly substitute of clinker in cement production) rather than a difficult and costly waste material.
Depending on the availability of the raw materials and market-specific requirements, further extenders are added to the common grinding process such as granulated blast-furnace slag. Mainly consisting of lime, silica acid, aluminum oxide, and magnesium oxide, blast-furnace slag is normally processed in granulation plants nowadays.
The process of granulation in blast furnace slag (BFS) by gas quenching can effectively recover the waste heat of BFS and improve the value-added nature of the BFS byproduct. With decreasing temperature, BFS crystallizes into melilite, anorthite, spinel, etc. Mineral crystallization, however, is not conducive to the production of amorphous ...
2018-5-14 · floor of the blast furnace. With an adequate layout of the hot runners on the castfloor, or through the introduction of an additional remotely located second granulation tank, one granulation unit can handle the slag of two tap holes. `Continuous filtering and evacuation of dewatered slag sand up to its storage facility without inter-
2017-3-3 · Blast furnace slag is one kind of solid waste, which is discharged from blast furnace. And the temperature of molten slag ranges from 1450 to 1650 ºC. In 2014, the output of blast furnace iron was more than 0.71 billion tons, and there were about 0.21 billion tons molten slag discharged from iron making process.
Slag Granulation Granulation of Blast Furnace slag is a very attractive option since it turns the Blast Furnace slag into a valuable by–product that can be sold to the cement industry Blast Furnaces normally generate 200 to 400 kg of liquid slag for every ton of hot metal produced.
Water granulating is widely used to treat blast furnace slag in iron-making process, and the large amount of waste heat of granulating water is currently wasted in the cooling tower or in detritus tank. In response to the status, a new-style technical scheme that the granulating water was used for building heating as the heat source was put forward in the paper.
The process of granulation in blast furnace slag (BFS) by gas quenching can effectively recover the waste heat of BFS and improve the value-added nature of the BFS byproduct. With decreasing temperature, BFS crystallizes into melilite, anorthite,