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许多工业废物的回收和处理受到了有效脱水能力的严格限制。炼钢过程排出的废物就属于这种类型。世界上有许多钢厂和类似工业在生产中要排出大量废物。钢铁工业排出的许多废水的特点是固体含量低（固体重量小于25％）、铁含量高（大于50％）、磁性物质含量高（Fe3O4大于50％）、细颗粒（小于25μm）多。这些性质往往阻碍了钢厂废水的有效脱水，而有效脱水是减少处理或回收废弃物料量所必须的。此外，有效的脱水工艺还可以得到不含固体颗粒的无污染水，可以作为无公害流体加以回收或排放。本文将论述含细粒磁性物料废物脱水新工艺的研究情况。本工艺包括磁场作用下的化学絮凝和絮凝浆体的真空过滤产生的滤饼及滤液两部分。这项复合力场脱水的专利技术通过制造一台由内部装有固定磁块的真空鼓式过滤机而宣告完成。稀土磁块是由宾州伊利兹（Eriez）磁性材料公司制造的，由犹他州盐湖城的韦斯泰克（WesTech）工程公司安装到实验型真空鼓式过滤机内。本文叙述了复合力场脱水对人工混合磁性矿浆试样和钢厂实际废水的试验结果。试验表明，应用磁场显著地改变了含磁性颗粒浆体的脱水机制。可能由于磁性颗粒沿着磁力线方向的定向排列形成通道，使滤饼内产生了许多上下贯通的孔隙，这样就可形成较厚的滤饼，而滤液?
The recovery and disposal of many industrial wastes is severely limited by the ability to effectively dewater. Waste from the steelmaking process falls into this category. Many mills and similar industries in the world have to discharge large amounts of waste in their production. Many of the wastewater discharged by the steel industry is characterized by low solids content (less than 25% solids), high iron content (greater than 50%), high levels of magnetic material (greater than 50% Fe3O4) and more fine particles (less than 25 microns). These properties often impede the efficient dewatering of steel mill effluents, which are necessary to reduce the amount of waste material handled or recovered. In addition, an effective dewatering process results in non-contaminating water free from solid particles that can be recovered or discharged as a pollution-free fluid. This article will discuss the research progress of the new technology of dehydration of fine granular magnetic material wastes. The process includes the magnetic field under the action of chemical flocculation and flocculation of the slurry generated by the vacuum filter cake and filtrate two parts. The patented dewatering of composite field was announced by manufacturing a vacuum drum filter with fixed magnet inside. The rare-earth magnet block, made by Eriez Magnetic Materials, of Pennsylvania, was installed into an experimental vacuum drum filter by WesTech Engineering Company in Salt Lake City, Utah. This paper describes the experimental results of mixed force field dewatering on artificial mixed magnetic pulp samples and steel mill actual wastewater. Experiments show that the application of a magnetic field significantly changes the dehydration mechanism of the magnetic particle-containing slurry. Due to the alignment of the magnetic particles along the direction of the magnetic flux, channels may be formed in the filter cake to make the filter cake penetrate up and down. In this way, a thick filter cake can be formed, and the filtrate?