Abstract Cold, binder-free tableting experiments under controlled pressure (0-450 MPa), water addition (0-10 wt.%) and pH (4, 11) were performed on powder of pyrolusite ore concentrates, refined hausmannite, bentonite, kaolinite, as well as blends of those materials. It has been shown that increased pressure was beneficial for agglomeration of oxide materials, but pressure > 250 MPa triggered an elastic recovery in the clay minerals. Water addition up to 4 wt.% improved tabletability, increasing diametral resistance and reducing elastic recovery and fines generation. Amounts above 6 wt.% decreased diametral resistance. The presence of layered-structure minerals (such as montmorillonite, kaolinite, lithiophorite) appeared to be key to determine the agglomeration potential of a sample. This study also showed that tableting provides good performances for recycling industrial manganese oxide fines by obtaining industrial-grade resistance for tablets made with an 80/20 pyrolusite concentrate/hausmannite blends and 4 wt.% H2O.

中文翻译：

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锰氧化物和工业矿物粉的无粘合剂压片实验

摘要 在控制压力 (0-450 MPa)、加水 (0-10 wt.%) 和 pH (4, 11) 的条件下，对软锰矿精矿、精制铝矾石、膨润土、高岭石粉末进行了无粘合剂冷压片实验。 ，以及这些材料的混合物。已经表明，增加的压力有利于氧化物材料的团聚，但压力 > 250 MPa 会引发粘土矿物的弹性恢复。添加高达 4 wt.% 的水可改善压片性，增加径向阻力并减少弹性恢复和细粉生成。高于 6 wt.% 的量会降低径向电阻。层状结构矿物（如蒙脱石、高岭石、锂硫磷矿）的存在似乎是确定样品团聚潜力的关键。