A special agitator shaft with symmetrically arranged agitator pegs and sleeves of tungsten carbide for wear protection devel- Vertical, batch operation mill for the preparation of tungsten Ideal flow behaviour due to a special agitator peg arrange-ment and the hemispherically shaped chamber floor integrated screen plate for grinding media separationIntensive cooling through a double-wall grinding tank and cooled circulation pipeline
Product inlet via rotor / immersion tube system prevents back flow of grinding media into the feed line.
Generally, there are two ways to obtain nano-powders. A bottom-up manufacturing method (bottom up) for chemical methods, such as chemical precipitation, sol-gel process (sol-gel),... Another method is physical method, which changes the powder particles from big to small (top down), such as mechanical ball milling,... And so on.
The Development In 1963, the first vertical agitator was developed internationally, the first horizontal agitator was developed in 1975, the first horizontal agitator bead mill with eccentric disks was introduced to the public and the horizontal disc grinder was introduced, in 2004, which became the industry standard. In the following years, the grinding media separation systems, the geometry of the grinding disks and the various grinding chamber materials were further developed.
The grinding system pin nanomill shows the evolutionary develop- ment of system with the rotor-slotted pipe separating system. The enclosed horizontal agitator mill is designed for highest product throughput rates and possesses a pin grinding system for highest grinding intensity.
In 2011, we developed the first zirconia comminution chamber technology in China. It has no metal ion pollution and is used in batteries, pharmaceuticals, glazes, ink and food.
砂磨机由装有研磨珠的研磨室组成,研磨室可以是静止的,研磨珠由搅拌器搅动;或者,整个研磨室做复杂运动,带动研磨珠运动。生产过程中,将药物粗粉置于含表面活性剂/稳定剂的溶液中,经高速搅拌得到粗混悬液。然后其经砂磨机研磨,固体颗粒粒径逐渐减小至纳米级别,得到纳米混悬液。
其中,产品细度主要由两个基本参数决定———应力强度和接触点数目。应力强度取决于研磨珠动能,能量足够高才能达到研磨效果。接触点数目决定了材料和研磨珠作用的次数,接触点数目足够多时产品才能达到良好的粒径分布。为增加接触点数目,可采用更小的研磨珠。根据经验,产品粒子大小可达研磨珠大小的1/1000。一般使用100~200μm大小的研磨珠制备纳米粒较简单,较易规模化生产,同时成本也较低。
砂磨机具有的优点包括:很好地控制粒径、大大降低成本、可大规模生产、活性成分零污染或极少污染、生产过程具重现性、产品满足美国cGMP要求等。以砂磨机生产纳米产品最重要的是选择适合的研磨珠和研磨室,避免污染产品。研磨区域应以良好的材料铸造。