Magnetorheological fluids have a viscosity which can be controlled by the application of magnetic field. Usually they have dispersions of magnetic particles with size micrometric in a carrier liquid. After purification process, extracted material from mining waste allowed us to obtain the magnetite that was used as the magnetic component of a magnetorheological fluid. The carrier continuous medium for such fluid was 2.5 and 20 W oils. These oils are used for damping systems in high-performance motorcycles and are readily available. The magnetics particle’s size ranged from 2 to 100 µm. Magnetic fields from 50 to 1200 gauss, as well as structural, morphological, and rheological studies were performed to the analyzed fluids. We observed that the model that best fits the stress vs. shear rate curves was the Herschel–Bulkley model.

磁流变流体的粘度可以通过施加磁场来控制。通常它们在载液中具有尺寸为微米级的磁性颗粒分散体。经过净化处理后，从采矿废料中提取的材料使我们获得了磁铁矿，该磁铁矿被用作磁流变流体的磁性成分。用于这种流体的载体连续介质是2.5和20W的油。这些油用于高性能摩托车的减震系统，并且容易获得。磁性粒子的大小范围为2到100 µm。对所分析的流体进行了50至1200高斯的磁场以及结构，形态和流变学研究。我们观察到最适合应力与剪切速率曲线的模型是Herschel-Bulkley模型。