At present, hollow glass microbeads are sorted from fly […]
At present, hollow glass microbeads are sorted from fly ash at home and abroad, which can be roughly divided into two methods. One is to use dry mechanical separation of hollow microbeads; the other is to use wet method to sort hollow glass microspheres. The specific method of adoption can be determined according to the actual situation.
In the domestic method of dry mechanical sorting, there is a sorting hollow glass microbead device with gravity separation screen system, which can process 30t fly ash day by day. This sorting process involves the extraction of hollow microspheres and the selection of iron, carbon, and various particle size fractions of hollow glass microspheres.
The hollow glass bead sorting device consists of three main components, a sorter, a separator, and a collector.
The sorter is made up of gravity separation method and the sorter consists of three settling tanks of different sizes. In the lower part of each settling tank, there is a discharging device. When the airflow containing fly ash enters the settling tank from the intake pipe, the negative gas flow rate decreases rapidly due to the increase of the cross section of the air flow passage, and the fly ash borrows The effect of gravity itself. Some of them gradually landed in the settling box. According to the principle of equal drop, heavier coarse particles, honeycomb vitreous, quartz, mullite, solid beads, iron beads and large particles of carbon particles were respectively settled in the sorter. . There are also some small hollow glass beads, ultrafine beads, etc., which enter the separator with the gas stream.
The separator utilizes inertial centrifugal forces acting on the particles during the rotation of the gas stream to separate the particles from the gas stream. The main form of the separator is the cyclone separator group. The small hollow microbeads from the sinker channel are fed into the separator with the airflow. After sorting by the two-stage cyclone separator group, most of the small hollow microbeads can be divided. Selected, the remaining small amount of ultrafine beads enter the collector with the gas stream.
The collector is at the end of the sorting device, which is both a purification treatment device and a collector for recovering ultrafine beads. The process uses a pulse bag collector that collects most of the ultrafine beads that have not been selected by the separator.
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