The quality of coke affects the performance blast furnace, factors affecting include coal properties, charge granulometry and carbonization conditions. properties size analysis, cold strength (Micum Indices-M40, M10) hot (Coke Reactivity Index-CRI, Coke Strength after Reaction-CSR) structural such as structure texture. Structural comprise porosity, pore-cell wall thickness pore sizes, while textures consist carbon forms in coke. In present work, advanced method image analysis was used to...

The microscopic structure and texture of coke are intrinsically important to the cold strength indices (M10 M40) hot (CRI CSR) properties coke. Traditionally, Blast Furnace (BF) is characterized by its composition, porosity, indices. There different conventional methods for determination porosity as well mass. In present work, a comparative study was carried out measurement interpretation microstructure using volumetric analysis, image mercury porosimetry, X-ray Computed Tomography (CT) scan...

Investigations were made on premature failure of refractories Blast Furnace Stove. It was found that holes the checkers clogged due to dust accumulation. Brick surface became glazed and top few courses t bricks completely vitrified deformed.Samples collected from different zones stove laboratory investigations made. The chemical analysis fusion point portion brick, indicated high content blast furnace gas prolonged dome temperature 1250°C chocking factors caused stove. is suggested for...

The rate of teeming steel as obtained with various types nozzles was studied. Heats approximately 140 tons and 230 were considered. Low-fusible or bloating type clays give an uneven pouring, undesirable from the metallurgists' point view. Magnesite which do not wear out, too slow a at end. Tar-impregnated clay medium refractoriness more uniform pouring.

AbstractIn a Steel Plant many failures take place and the refractory technologist is called upon to overcome these problems. In finding out solution such problems also pinpoint real cause of failure material, after service examination refractories or 'Post-mortem' very useful tool in hand Refractory Engineers. Such study helps formulate proper specification, correct method control on quality material. It may lead modifications change either design operation technique.In this paper various...

High alumina monolithic with phosphoric acid as a binder are being used extensively in metallurgical furnaces. Development work was undertaken the range of 60 to 90% aluminous material indigenous raw material, e.g. bauxite, kyanite and diaspore. Phosphate bond developed certain additives without detrimental physical properties.

Roof Cleaning is one of the means adopted by different steel plants throughout world for increasing roof life open hearth furnaces. With adoption basic in TISCO, it was observed that getting over-heated and tabs holding bricks were cut. This resulted premature failure requiring frequent hot repairs. It presumed dust accumulation acting as insulation altering thermal gradient enhancing liquid migration deeper brick. Laboratory investigation confirmed this assumption. In cleaning has been...

During the dismantling of coke ovens, large quantity silica waste was recovered and an investigation undertaken to find out suitable means utilize these materials. The use grog for making brick restricted due its high grain porosity inversion cristobalite at lower temperature which seriously affects bond strength.Work develop proper composition with binders bricks utilizing waste. were made tried in ladles used transferring blown metal from Bessemer Shop Open Hearth furnace. Encouraging...

AbstractCurrently, the stoves of blast furnaces are operated at a higher temperature for increasing productivity. Consequently, demand on quality checker bricks has increased. In TISCO, hot 900°C. An attempt been made to evaluate refractories available from indigenous sources. Various physical and chemical properties have analysed along with their mineralogical constituents. Compressive creep characteristics also evaluated.

In the past, there were a few major refractory failures in blast furnaces of TISCO, viz. hearth break-outs, damage to throat lining, etc. These repaired and put back operation. Premature also experienced hot stoves, particularly checkers. this communication, such occurrences details repair work done, have been discussed.

Conventional repairing practices of the worn out portions furnace with bricks require longer time and sometimes a perfect job cannot be done due to inaccessibility places. These problems repair are overcome by ‘Gunniting’ technique. In this article gunniting technique various types materials used discussed review published work has been made. Application as practised in parts authors' plant described.

AbstractSilica bricks are used in oven walls, regenerator division roof covers and sole of coke ovens. Specifications followed different countries discussed. Data on iron oxide lime bonded obtained from indigenous sources have been given. Causes refractory failure the ovens maintenance procedure that Tata Iron Steel Co