The low-iron quartz sand used in the production of photovoltaic glass can remove the coarse particles larger than 710 microns in the quartz sand.
The traditional process is to separate the particles in quartz sand by rotating the circular sieve.
Since the hardness of quartz sand reaches mohs 7, the sieve screen in the round screen is usually made of 304 stainless steel.
In order to ensure that the particles in the finished quartz sand reach the standard, the general process must ensure the three-stage screening and filtration,
According to the process flow of 15,000 tons/month in the quartz sand dressing workshop,
There were 18 round sieves from start to finish.Under normal working conditions of 20 hours a day,
A screen can normally be used for about 7 days. Basically, a screen needs to be replaced every day.
Screen, labor, shutdown and other costs are extremely expensive.
In this paper, a kind of hindered sedimentation equipment for separating coarse grains of quartz sand by hydraulic classification principle is introduced to quartz sand manufacturers.
The basic working principle of the arrested sedimentation machine is to use coarse particles larger than 710 microns in quartz sand,
The natural separation of coarse particles and fine sand can be realized under the action of strong water pressure.
As quartz sand under the impact of strong water pressure, the pulp of quartz sand in the equipment tumbling scrub each other,
In this process, the weathered layer with lower surface hardness of quartz sand particles naturally breaks away and becomes fine powder.
This effect can also play a part in the natural iron removal in the process of quartz sand dressing.
The selection of the arrested settling machine depends on the capacity of the factory, it is suggested to use the circular arrested settling machine is more practical,
Take the factory with a monthly production of 15,000 tons as an example, it is recommended to choose the factory with a diameter of 1.5 meters and a depth of 4.5 meters.
The selection of the powerful water pump depends on the water pressure of the water supply source, and the water pressure must be guaranteed.
To prevent the lack of pressure caused by coarse sand and fine sand separation is not clean.
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