Study on a New Type of Exothermic Insulating Riser

DOI

10.2991/icmea-17.2018.8How to use a DOI?

Keywords

heat insulation riser sleeve; ignition time; secondary combustion; production process

Abstract

With the higher and higher requirement for the quality of casting and the continuous development of casting technology, sand mold riser, heat insulation riser and heat production riser produced by the traditional process produced cannot reach the requirements of feeding of casting due to a lot of shortcomings, such as the lack of heat production and poor heat preservation effect. Therefore, the research and development to the risers with the dual function of heat production and heat insulation have attracted considerable attention of the foundry industry. In the paper, on the basis of consulting a large number of literatures, the majority of heat production and heat insulation risers are analyzed, and a large number of experiments are conducted. The raw materials and the specific ratio of heat production and heat insulation riser are preliminarily determined: with aluminum powder (15%~25%) and ferric oxide (8%~15%) as the heating materials, graphite (5%~10%) as the auxiliary heating material, sodium silicate as the binder, cenosphere (35%~ 45%) as thermal insulation material,cryolite (0~5%) as the fluxing agent, tail slag (5%~12%) as aggregate and some ferric oxide, and potassium chlorate (2%~6%) and potassium nitrate (2%~5%) as oxidants. By comparing the ignition time and secondary combustion time of the different ratios of raw materials, the choices are gradually optimized. Finally, new heat insulation riser is obtained, which ignition time is 20~40s, secondary combustion time is 10~30s.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Nengwei Wang
PY  - 2018/02
DA  - 2018/02
TI  - Study on a New Type of Exothermic Insulating Riser
BT  - Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)
PB  - Atlantis Press
SP  - 31
EP  - 36
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmea-17.2018.8
DO  - 10.2991/icmea-17.2018.8
ID  - Wang2018/02
ER  -