The formation of zeolite from blast furnace slag can be divided into four steps, i.e., dissolution of aluminate ions and silicate ions from raw material, formation of the amorphous intermediate ...

This paper reported the calculation of the reaction heat in titanium-bearing blast furnace slag (abbreviated as TBFS)-H 2 SO 4 system based on estimation of thermodynamic data of CaTiAl 2 O 6 by mechanical mixture model. The thermodynamic analysis indicated that CaTiAl 2 O 6 was more stable than the corresponding ternary oxides as CaO·TiO 2, CaO·Al 2 …

9.1 Formation of Potassium Slag in Olivine Fluxed Blast Furnace Pellets ... amount of liquid slag early in the blast furnace gives higher porosity which ... Steel using the gas flow, heat transfer and permeability components of

For one large scale blast furnace, production rate of melted slag (at about 1500℃) is 100 – 150t/hour. Solidified by natural cooling in atmosphere or rapid cooling by water. ÆHeat recovery has not yet been done. 3 Potential of melted slag as heat source Melted slag at 1500℃has sensible and latent heat of about 400 – 500 cal/g.

a blast furnace body is one of the restrictive links of blast furnace longevity.4) In recent years, Chinese commercial blast furnaces have suffered a large amount of economic losses due to the damage of copper stave.5,6) The formation of slag crust on …

The blast furnace uses three sections copper stave as cooling equipment in the bosh, the belly and the lower part of the blast furnace body. During 14 years and 9 months operation of the blast furnace, the copper stave has been operated well without damage, and the shape of the copper Table 1. Main Operating Data before the blast furnace over ...

Blast furnace slag, which is the main by-product of the ironmaking process discharged at 1450 °C, contains high-quality sensible heat, while oily sludge is …

Blast Furnace Slag (BFS) cement is the combination of Ordinary Portland Cement (OPC) and fine Granulated Blast Furnace Slag (GBFS) gained as a byproduct in the steel making manufacturer with below 70% to that of cement. Ground Granulated Blast Furnace Slag (GGBFS) is a fine glassy granule which encompasses cementitious possessions.

High Temperature Properties of BOF Slag and its Behaviour in the Blast Furnace Lena Sundqvist okvist SSAB Tunnplat AB, Luleii and Lulea University of Technology, Lulea / Sweden Slag formation in the bosh and raceway is an important issue in the blast furnace process. SSAB works in Lulea operate with 100 % olivine pellets.

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. The melting point of the slag is to be neither too high nor too low. The final slag is to be fluid enough so that it is possible to drain it through tap hole,

Liquid slag produced in a blast furnace (BF)is at a temperature of around 1500?C and has a sensible heat of around 400Mcal/ton. BF slag is rich in CaO, SiO2, Al2O3, and MgO which are similar to the components of Portland cement. When this liquid BF slag is cooled fast enough then the solidified slag has a large percentage of glassy phase with high …

In a blast furnace, the flow phenomenon of the slag, as dictated by its viscosity, greatly influences the heat transfer, mass transfer and chemical reactions between the slag and the metal. The blast furnace slag should be a free-flowing one at the operating temperatures to ensure efficient slag–metal separation. It must have appreciable

Selection of basic slag formation injectant Possible fluxes to be injected into the blast furnace were considered to be burnt lime, burnt dolomite or BOF slag. Limestone or dolomite have a strong cooling effect on the raceway flame temperature, which would limit the injection rate of pulverized coal too much. The effect on tuyere slag formation

Blast furnace slag is a byproduct of iron making. For 1000 kg of iron, approximately 290 kg of slag is formed. When the melted slag leaves blast furnace, its temperature is about 1800 K. In Japan, approximately 24 million tons of blast furnace slag is formed annually (1). The heat of melted slag produced annually in Japan is

When the melted slag leaves blast furnace, its temperature is about 1800 K. In Japan, approximately 24 million tons of blast furnace slag is formed annually (1). The heat of melted slag produced annually in Japan is estimated to be equivalent to 1.8 million tons of coal, which is about 1 % of total coal

If half of heat of blast-furnace slag is to be recovered in Japan, the heat will be equivalent to about 1 million tonnes of coal annually. The bed size to recover heat is estimated to be 6m×4.5m(cross sectional area) x 3 m height for 100t-slag/hour. Cold model experiments were carried out to remove solidified material from the bottom.

10.2.2 Blast furnace slag. Blast furnace slag (BFS) is a by-product from iron production in blast furnaces, which are fed by a mixture of iron-ore, coke and limestone. In the process, the iron ore is reduced to iron while all remaining materials form the slag, which is tapped off as a molten liquid and cooled.