脉冲脱磁器的原理.DOC

摘 要 我国一些铁矿选矿广试用了脱磁技术，它初步显示出重要作用。改善了选矿技术经济指标，保证新工艺的顺行，本文根据细粒磁性物回收工艺中需要使用脱磁器的要求，首次提出磁场强度高、能耗低、高性价比、具有自适应控制功能的脉冲脱磁器的研究和设计。本文主要开展了以下研究工作。 首先，本文对预磁化机理进行了研究，首次提出脉冲脱磁器系统结构，将RLC电路振荡波形转变为振动波形，形成“脉振”高场强。 其次，本文以单片机为控制中心设计了具有自适应控制功能的系统控制板。系统控制板软件、硬件结合实现了磁场强度和周期的自适应控制、重悬浮液磁性物浓度测量、同步信号检测、报警控制、双磁体线圈交替工作控制等功能。 此外，本文研究了脉冲脱磁器的特殊工作环境，对其工作现场可能产生的干扰和可控硅的保护机制展开研究并采取了如硬件、软件抗干扰措施，对可控硅采取了阻容吸收、热设计等可控硅保护措施。 本文最后对脉冲脱磁器整体装置进行了工作性能和脱磁效果测试。测试表明装置充放电时序机制合理、双磁体线圈热适应能力强、能耗低、磁化效果明显有自适应控制功能的磁性物回收的脱磁设备。 本文的完成推动了选煤行业电磁系脱磁器的发展，而且作为磁化设备可以向铁选矿厂的矿浆预磁化、锅炉水磁化、污水处理磁化、炼铁厂铁粉回收磁化的工艺中推广应用。 关键词：脱磁器； 脉冲； 自适应 Abstract Based on magnetite fine powder recycling technology needs, The first this paper research and design the demagnetize implement with high magnetic field intensity, low power consumption, cost, adaptive control and so on. The paper carried out the following studies: Firstly, this paper research the mechanism of demagnetizes. the first design the system structure of pre-magnetization implement with the Pulsating Vibration. RLC circuit wells will be shaped into a vibration wave, form pulsating high field strength. Then, based on MCU control center designed to function with adaptive control system panels. System Controller software and hardware combining produce a pulsating magnetic field, magnetic suspension heavy concentration measurement, Synchronous detection, alarm and control functions work in the turn-magnet coils. Beside, this paper studies the special work environment of Pulse vibrates in demagnetize implement, the scene may potential interference and protection mechanisms of SCR, takes some work such as a hardware Software anti-interference measures, silicon stop absorbing, silicon design thermal protection measures. Finally The overall device performance test results and magnetization, the testing showed that the reasonable timing mechanism for charge-discharge, two magnet coils heat adaptable, low consumption, adaptive control function of pre-magnetic magnetic implement. In this paper