Peddolla Prachethan Kumar, Abhi Kinlekar, Sagar Chandra Barman and Mallikarjuna Kurba:
Influence of coking time on coke quality from non-recovery vibro-compacting coke ovens
Coke quality depends on the quality of coal or its blend, coking parameters and pre-carbonisation techniques, if any. JSW Steel has adopted vibro-compaction pre-carbonisation technique, along with non-recovery ovens, having a capacity to produce 1.2 million t/a of coke. Coking conditions are determined majorily by coking time and oven temperatures, etc. Coking time is the most important parameter of coking conditions and plays a significant role on coke quality. The coking conditions are determined, to a great extent, by the quality of coal blend used, especially the volatile matter (VM) and the coking properties. Plant scale trials were conducted by varying coking time on different coal blends to study its effect on the process and coke quality. The experiments at vibro-compacted non-recovery coke ovens revealed that coking time influences the coke quality and depends on the quality of the coal blend. The high temperature properties, coke reactivity index (CRI) and coke strength after reaction (CSR), improved with longer carbonisation time in case of coal blends with inferior coals in the blend.
Peddolla Prachethan Kumar, Yogish Sooryanarayan Rao, Sagar Chandra Barman, Gururaj Hosabettu, Sekhar Vadarevu, and Madhu Ranjan:
Influence of operational parameters on the performance of the Corex reduction shaft
Smelting reduction (SR) processes were developed with the objective of eliminating the need for coke, since the good quality coking coal reserves are limited and depleting fast. The SR processes operate with coal to meet the thermal and reducing requirements. Corex is one of such SR processes which emerged as a commercially viable iron making technology. It consists of two reactors: the reduction shaft and the melter-gasifier. The reduced iron bearing material from the reduction
|
|
Gerri H. Tappe:
New developments in welding technology, profound base to enhance chances
Good mood dominated the 17th International Essen Welding Fair, thus delighting the 1015 exhibitors. Before the beginning of the exhibition which started on September 14th under the clouds of the worldwide economic crisis, many firms were still uncertain whether this year’s involvement would pay off. However, the number of visitors on the second and third days of the fair was already slightly above those of the preceding event in 2005. Upon completion, the organizer was
|
|
First commercial ITmk3 plant begins production
First commercial ITmk3 plant begins production
The world's first commercial plant using the ITmk3 Process began production of iron nuggets in Hoyt Lakes, Minnesota, USA.
Stéphane Graff and Franz-Josef Lenze:
Simulating the hot stamping process of high-strength 22MnB5: From hot stamping to crash-simulations
Going through several aspects of the virtual design chain of hot stamped components, the necessary and often critical points and problems related to the material characterisation and to the simulation of the hot forming process and of the crash behaviour are discussed. Then, the experimental results and simulations of hot stamping laboratory tests on two different geometries are shown and analysed in terms of thinning,
Franz-Josef Lenze, Sascha Sikora, Janko Banik, Oliver Straube:
Hot forming - new potentials for innovative manufacturing
Hot forming has established itself as an important manufacturing technology for body-in-white (BIW) parts. The main advantage is the ultra-high strength of the parts combined with excellent accuracy after the forming step. Hence, adequate process control is indispensable to ensure appropriate part properties. Thermal imaging represents a suitable implement for process monitoring and the understanding of the various parameters influencing temperature behaviour. This device supplies
D. Satish Kumar, Sundaresan S., Vasa S. N. Murthy, Prabhat K. Ghorui, and Madhu Ranjan:
Pretreatment of hot metal
In present times, the products of most of the iron making units are characterised by high silicon and phosphorus contents, due to poor raw material characteristics. Removal of these impurities increases the processing time at the converter and ladle treatment. Additionally, increasingly stringent quality requirements have heightened the demand for steels with very low levels of impurities, such as phosphorus, sulfur, hydrogen, nitrogen, oxygen, and
|
RSS feed
| 
top of page
All external sites will open in a new browser.