Papers by Keyword: Fe-Ni

Abstract: In this project we have represented the reduction of the ancillary heavy oil substance in the rotary kilns in the new foundry of the new Ferronickel in Drenas, with the use of the ancillary substance Pet Kok. The experimental and industrial research have been analyzed during the years 2008,2009,2010,2011,2012 and 2013. The chemical composition of heavy oil was analyzed in the INKOS Institute in Obiliq, while the composition of Pet Kok in the laboratory of the new foundry in the new Ferronickel in Drenas. The use of Pet Kok reduces the attachment of the substances in the rotary kilns walls, and it impacts the benefit of the calcines in a higher temperature and quality. The big amount of moisture of the Fe-Ni ore and the lack of an adequate dryer to reduce the moisture of the ore are two of the many factors of the large amount of ancillary substances in the rotary kilns. On 12.05.2011 pet kok has begun to be used in rotary kiln two, while in rotary kiln one pet kok has been used from 1.09.2012, the favorable impact of the use of pet kok in the technological process in the new foundry of the new Ferronickel in Drenas in the qualitative iron-nickel affected the reduction of the amount of heavy oil.

Abstract: A 700 advanced ultra-supercritical (A-USC) power plant technology project was initiated in China in the year of 2011. The highest temperature components in A-USC boiler are superheater and reheater tubes. The fire-side metal temperature can reach 750 (even higher). Based on the very long time service (30-40 years) these important high temperature tubes require 10⁵h long time stress rupture strength higher than 100MPa and the corrosion/oxidation layer loss less than 2mm for 2×10⁵h. The highest temperature components in 700 steam turbine are the buckets of different stages and require very long service time. At this severe condition only superalloys can fulfill these unusual requirements. This paper reviewed Fe-Ni and Ni-base superalloys from the view point of structure stability and long term mechanical properties and corrosion/oxidation resistance for 700 A-USC power plant materials selection.

Abstract: The key concept of nanopowder agglomerate sintering (NAS) process is based on the optimization of structure design and full density processing of nanopowder into nanostructured micro-components. The kinetics of NAS process is characteristic of being controlled by material transport through hierarchical interface structures of nanopowder agglomerates. Through optimal design of those hierarchical interfaces such as nano grain boundary and agglomerate boundary, thus, full density nanopowder materials can be fabricated by pressureless sintering. In this paper we overview recent studies on the role of hierarchical interfaces for processing of full density nanopowder materials.