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Effect of Magnet Shapes on Metal Contamination Removal

10 pagesPublished: March 13, 2019


Foreign metal removal is a key process in the quality control of food and pharmaceutical industries. Previously, foreign metal removal involved the use of metal detectors. However, in recent years, magnet separators have been used to capture small metal particles and to improve the manufacturing yield when installed with previous metal detectors. Currently, most foreign metal material is austenitic stainless steel because product process equipment are manufactured using the same in order to make them corrosion proof. SUS304 and SUS316L are used commonly. Small metal particles adhere to the equipment by sliding and other processes thus contaminating the equipment. Austenitic stainless steels are not magnetized; however, weak magnetization is observed through martensite transformation during sliding and collisions. However, it is not easy to remove small stainless steel particles in production processes that involve powder flow. In this study, we investigated the removal rate of small stainless steel particles by three magnets of different shapes under the same conditions.

Keyphrases: Contamination, magnet, removal

In: Gordon Lee and Ying Jin (editors). Proceedings of 34th International Conference on Computers and Their Applications, vol 58, pages 428--437

BibTeX entry
  author    = {Takashi Ohnishi and Takashi Okamoto and Keiichi Watanuki},
  title     = {Effect of Magnet Shapes on Metal Contamination Removal},
  booktitle = {Proceedings of 34th International Conference on Computers and Their Applications},
  editor    = {Gordon Lee and Ying Jin},
  series    = {EPiC Series in Computing},
  volume    = {58},
  pages     = {428--437},
  year      = {2019},
  publisher = {EasyChair},
  bibsource = {EasyChair,},
  issn      = {2398-7340},
  url       = {},
  doi       = {10.29007/9pvg}}
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