Research And Development Of Reconstructive Technology Of DC-Ⅱ Type 600mm High Intensity Magnetic Separators

DC-II type 600mm High Intensity Magnetic Separators , which was developed by our unit in the 1980s, has been applied in many research units and coal operation units. As the increasing demand of mineral operation, this kind of instrument can not meet the requirement of experiment and production. In 2002, with the support of the Ministry of Science and Technology, the research on this kind of instrument was carried out.The problem of the original instrument was that: 1.It was very inconvenient in operational dial timing. Instrument needed to be stopped in every timing and the timing scope was narrow. 2. The operational magnetic field was unstable.With consideration of the above problems, DCS (Total Distributed Control System) was adopted in our research. Frequency modulation timing technology was applied in stepless timing control of operational dial. Current modulation module and feedback control technology was chosen in control of operational magnetic field. Therefore, a stable operational magnetic field was attained and the instrument operational performance was improved. At the same time, the refrigeration and protection system was enhanced, and the demand of experiment and production was satisfied.The project was checked and accepted by Ministry of Science and Technology in March 29 2004.