Run of mine of silica sand needs to be processing and washing to
remove impurities, such as iron, aluminum trioxide, mica,etc.,so as
to meet different industrial use. The quartz sand can also be
processed into quartz powder through drying and grinding.
High Purity White Quartz Silica Sand Washing Processing Production
Line Technical process
The following is the usual purification process of quartz sand. The
raw ore is crushed and screened to remove impurities, then washed
and scrubbed to further remove the impurities from quartz sand.
Then the symbiotic metal and non-metal impurities are removed by
flotation and finally the high purity quartz sand is obtained by
rinse. The main process steps are as follows:
1. Raw ore treatment
The common quartz ore is generally quartz lump ore and silica sand.
The quartz lump ore needs to be crushed up to 25mm and then ground
by rod milling to a certain size, and then enters the subsequent
washing, scrubbing, flotation and other processes. The silica sand
needs to be screened out the impurities such as soil, organic
matter and so on before entering the next stage of processing.
2. Preliminary cleaning and dewatering
The treated raw ore can enter the screw sand washer for preliminary
cleaning and dewatering, and some impurities can be removed. At the
same time, dewatering is carried out, so that the concentration of
quartz sand slurry reaches 60-70%, which is preparation for the
subsequent scrubbing operation.
3. Scrubbing
The adjusted slurry of quartz sand is sent to the scrubber for
scrubbing. After continuous scrubbing, the soil, impurities
covering the surface of quartz sand are separated, and then slurry
goes into the washing operation for further treatment.
4. Secondary washing
After scrubbing, impurities and quartz sand have been separated,
impurities exist in the surface of quartz sand and slurry, through
the screw sand washer the purity of quartz sand can be further
improved.
5. Quartz sand flotation
There are some impurities such as iron oxide, aluminum oxide and
mica in the quartz sand after washing. At this time, the impurities
can be effectively removed by adding appropriate flotation agents
through flotation process, so as to obtain higher purity quartz
sand.
6. Further washing and dewatering
After flotation, quartz concentrate can be dewatered by screw sand
washer to obtain the final high-purity quartz sand, and its SiO2
content can reach more than 99%.
7. Other processes
According to the actual production needs, the quartz sand after
flotation can be further dewatered and dried, and then through the
quartz sand grinding and classifying system the quartz powder can
be obtained to meet different industrial needs.
Our company can provide a complete set of quartz sand processing
and purification solution and equipmets. In addition to the
conventional treatment process mentioned above, we can also use
particle size classification, strong magnetic separation, acid
pickling and other technological processes according to the
property of quartz sand to produce high-purity quartz sand products
with different requirements.
