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Feb 22 2019 Ando J Nakahara T Onous H Ichimura S Kondo M 1985 Development of slag blast granulation plant characterised by innovation of the slag treatment method heat recovery and recovery of slag as resources. Mitsubishi Heavy Ind Tech Rev 222136142. Google Scholar 4.
May 05 2013 The benefits of slag granulation process includes i it converts waste material to a valued useful product ii it eliminates slag dumping and hence all the drawbacks associated with it iii investment and operating costs are lower than the costs associated with the slag dumping iv it is a reliable process v reduces manpower when compared with slag dumping vi the process can be fully automated vii saves on land area needed for slag
The number of granulation plants for blast furnace slag has grown strongly. Since around 2000 the most important Chinese steel producers have been investing in granulation and grinding plants for blast furnace slag. It is currently estimated that 95 of the blast furnace slag is granulated and used entirely in the cement and concrete industry.
Slag granulation using water sprays is now an established technology that not only simplifies blast furnace casting floor operations but also provides an economical route for producing of a valuable raw material for a host of industries. The slag granulation plant comprises three sections for granulation dewatering and storage.
Each year approx. 400 million tons of blast furnace slag is produced worldwide with a tapping temperature of around 1500 C. Currently the slag is granulated in wet granulation plants using large volumes of water and to date it has not been possible to utilize the remnant heat energy of the molten slag with approx. 1.7 GJ of energy per ton.
The first blast furnace slag cement was produced in Germany in 1800 by mixing slag and lime 6. Even before 1800 however the properties of such cement were studied in France. Since the 1860s it has been used in commercial production and in the United States slag cement production began in 1896 7.
Jan 01 2018 A slag granulation plant basically consists of granulation dewatering and storage sections. Different granulation processes could be applied in granulation section. The liquid slag is either fed into a slag pot or it is directly fed via a runner to a granulation plant in order to produce conventional water GBFS.
Aug 23 2016 Abstract. Slag dumping and water granulation are the most commonly used slag treatment methods in the metallurgical industries. In both processes water is present by desire for cooling and dispersion or as a result of rain accumulation and thus equipment and operations are designed to minimize and mitigate the risk of steam explosions resulting from the inappropriate contact of slag
Nov 01 2019 Abstract Development of geopolymer concrete GPC with industrial by-products is a solution to the disposal of the industrial wastes thus making the concreting process sustainable. This paper focuses on the development of GPC using ground-granulated blast-furnace slag GGBS and dolomite by-product from rock crushing plant as source materials.
However in the 1950s slag cement became available in other countries as a separate product. The first granulation facility in the U.S. to make a separate slag cement product was Sparrows Point Maryland in the early 1980s. Recent years have seen the supply and acceptance of slag cement grow dramatically throughout the U.S.
Slag Granulation is primarily affected by water temperature water pressure and water flow rate. When the material solidifies under slow cooling conditions escaping gases leave behind micro pores in the cooled mass. When formed under controlled rapid cooling the slag tends to be hard and dense making it suitable for use in all concrete
Water granulation is the most commonly used method to handle blast furnace slag and requires a granulation and a dewatering step to process the slag. In water granulation the energy in the slag is lost from water evaporation and cooling and is difficult or impossible to recover. Hatchs dry slag granulation process uses air to directly granulate slag. A stream of hot air is recovered from the granulation chamber.
Apr 04 2019 Dry granulation of liquid BF slag is being developed in many countries along with heat recovery process. The dry granulation process of liquid slagis described below. Dry slag granulation process is essentially to atomize the liquid slag and then to cool the particles rapidly so as to produce a
Recently the project passed another milestone with the start-up of a semi-industrial pilot plant on the premises of voestalpine Stahl in Linz Austria. The plant is intended to operate in batch mode processing slag from a single blast furnace and allowing engineers
There is no current global growth in blast furnace slag production due to the rise of Electric Arc Furnace EAF steel production. Only around 75 of globally-produced blast furnace slag BFS is granulated creating around 250Mt of GBFS albeit with 150Mt in China 30Mt in Japan and 70Mt in
Slag cement also called ground granulated blast furnace slag is a hydraulic cement produced during the reduction of iron ore to iron in a blast furnace. Molten slag is tapped from a blast furnace rapidly quenched with water granulated dried and ground to a fine powder. The rapid quenching freezes the molten slag in a glassy state which gives the product its cementitious properties.
the project from large laboratory scale to a full size pilot plant. The phase 2 development of this plant is now underway and is scheduled for installation at the site of an industrial partner in early 2016 where full slag flow will be fed directly to the plant from Blast Furnace slag runners. This paper will show the development path
Molten slag from pyrometallurgical furnaces is tapped at high temperature carrying a large amount of thermal energy. But the common slag dumping and water granulation methods used for slag treatment do not permit energy recovery. Furthermore water is present in these processes and while operations are designed to minimize risks of steam explosions from the contact of slag with water these .
Wet granulation of titania slag Description and operation of the wet granulation plant Wet granulation of titania slag was carried out at the research and development facilities of Exxaro in Pretoria. Ilmenite was smelted in the 1.5 MW DC furnace at this facility. The typical titania slag tap
A new plant for producing ground water granulated blast furnace slag has been constructed at Sparrows Point Maryland. - The facility was specially designed to water granulate 800000 tons per year of blast furnace slag produced by one of the largest and most modern blast furnaces in the world.
Processing and Reusing Technologies for Steelmaking Slag. 300 kgt-p per ton of pig iron for blast furnace slag and about 100-. 150 kgt-s per ton of .. They include the air granulation process whereby a high- pressure gas is .. to cruciferous plants Chinese cabbages cabbages etc. called clubroot.
Aug 09 2016 Scale-up to Semi-industrial Scale DSG Plant 200912 Circulation and cooling of droplets and granules in the cyclonic section High speed video of spinning disc during dry granulation of blast furnace slag at 75 kgmin Designed constructed commissioned and used to generate data for validating CFD model 3 m diameter reactor processing batches of 500 kg slags at 6th Pilot plant
May 17 2019 INBA slag granulation system for blast furnace No.6 at JFE Steel Chiba Japan. JFE Steel Corporation Chiba Works BF6 Slag Granulation. Paul Wurth IHI Co. Ltd. hereinafter PWIHI is pleased to announce that it has completed a new construction of slag granulation system and INBA dewatering drum comprising of filtering screens distributor slow down boxes etc. as part of the slag
Granulation of titania slag has been identified as a potential viable alternative to the conventional block route. Both wet and dry granulation of titania slag has been investigated. TiO2-rich slag is a suitable feed material for the chloride process if the ilmenite feed material is low in alkaline earth impurities.