我厂磁选铁精矿的过滤是使用我国首批试制的12米~2永磁外滤真空过滤机(图1)。自从投产以来,经过改进,生产实践表明,该机脱水效果良好:磁精矿粒度为40%-200网目,给矿浓度在40～50%时,精矿滤饼水份为10%,产量可达5吨/米~2·时。磁滤机在投产初期暴露出一些问题,如 My factory magnetic separation of iron concentrate is the use of China’s first trial of 12 m ~ 2 permanent magnetic filter vacuum filter (Figure 1). Since its commencement of production, after the improvement, the production practice shows that the machine has a good dehydration effect: the magnetic concentrate particle size is 40% -200 mesh, and the ore concentration is 40% ~ 50%, the concentrate cake moisture is 10% Up to 5 tons / m ~ 2 · hours. Magnetic filter exposure in the early stages of some problems, such as