In the next issueâ€Ś Steelmaking Production of ferritic stainless steel at VOD plants High plant productivity and long continuous casting machine sequences combined with very strict quality requirements in terms of carbon and nitrogen levels are the main targets achieved at the VOD plant of Chinese Taiyuan Iron & Steel Co. started-up recently. An optimized process technology allows for carbon and nitrogen levels lower than 150 ppm. The VOD process parameters and the preconditions for the incoming liquid steel are discussed in this article. Material flow logistics Analysis of prevalent scrap yard layouts Raw material costs not only include the basic price of raw materials themselves, but also â€“ often neglected but equally important â€“ the costs for scrap purchasing and inventory management as well as for scrap yard logistics and operations, i.e. material storage and material handling. Without any doubt, the scrap storage and the material flow have a major impact on production figures and operation costs. In any case, the success of steelmaking business starts at the scrap yard. Secondary metallurgy Vessel lifting versus ladle lifting system for typical RH plant configurations The design and the technological specifications of an RH-type circulation degassing plant are usually tailor-made for the respective steel works with sometimes very specific considerations, at least the option for later expansion. In this article the various lifting systems for RH plants are compared; the operational principles are explained with special emphasis on their pros and cons. This preview may be subject to change. #=+G52;1.-G+A # " G 8@G G GG E;;.5-8:/ G .:G6*G7A G G G *@G G G . 6*25GG69< ;<*15.2;.7 -. #=+G52;1G.: @.,=<2>.G .6+.:G8/G<1.G *7*0.6.7.:G<2;G270G *7G*0G.: G%20:2-G 5270. G G G *@G G G . 6*25GG;20:2- 45270. ;<*15.2;.7 -. 2;<:2+=<287G .9< G *+:2.5.G)*5 G G G *@G G G . 6*25GG0*+:2.5. ?*5- ;<*15.2;.7 -. #:8G-=,G<287G *7*0.: G =:41*:-G%<*:4=55* . 6*25GG+=:41*:- ;<*:4=55* ;<*15.2;.7 -. #:8G-=,G<287 *A8=< G#.<.:G E,1.5. . 6*25G9.<.: +=.,1.5. ;<*15.2;.7 -. -G>.:G<2;G270G:*<.G,*:-G!8 G G8/G #=+G52G,*G<287 G >.G:AG GG687<1; 7G7=G*5G;=+G;,:29G<287G:*<.G 27,5 G98;.-G+AG<1.G#=+G52;1G.:;G+AG <1G!8>.6 +.: G"<1G.:G?2;. G<1.G;=+G;,:29G<287G2;G*=G<8G6*.G:201<;G<8G9=+52;1G<1.G?8:4 -=:270G<1.G52/.<26.G8/G<1.G,89A:201< G 7G9*:<2,=5*: <1.G9=+52;1.:G?255G1*>.G/=55G*=<18:2AG6.<*5 /:..G9:27<270G274

MPT International 6/2013 (Dec)