In the production of quartz sand sheet sand and fracturing sand, the wet
process can balance particle shape control and impurity removal. Shanlu Heavy
Industry provides a complete equipment combination from rod grinding, scrubbing
to grading, magnetic separation, and dehydration, suitable for scenarios with
high requirements for sand roundness and surface cleanliness.
Taking a typical wet process board sand production line as an example: the
raw sand is fed into a quartz sand wet process rod mill through an LC automatic
weighing feeder. The device is equipped with chromium alloy steel rods inside
the cylinder, which grind the material through linear contact between the rods.
The output particle size of the rod mill is uniform, with less over crushing
phenomenon, and the finished sand particle shape is cubic, which is conducive to
the particle size distribution of the board sand. The discharged slurry flows
into the CX scrubbing machine. The device consists of a stirring tank and an
impeller group, which uses high-intensity stirring to make the sand particles
rub against each other, removing surface attachments and iron films. The
scrubbing concentration is controlled at 60% -70%, the scrubbing time can be
adjusted, and the cleanliness of the sand surface is improved after
treatment.
The cleaned slurry enters the SF hydraulic classifier for particle size
classification. The classifier designed by Shanlu Heavy Industry uses upward
water flow to separate fine and coarse particles, and can obtain standard ranges
of sand such as 40-70 mesh and 70-140 mesh. The fine powder in the graded
overflow enters the NM thickener for concentration, and the bottom flow of the
thickener is then sent to the pressure filtration system. The graded coarse sand
enters the PBC permanent magnet wet plate magnetic separator for iron removal.
The device adopts a flat magnetic separation structure, with a magnetic field
strength of up to 6000Gs. When the slurry flows through the surface of the flat
plate, magnetic particles are adsorbed to the magnetic field zone, and
non-magnetic sand is discharged with the water flow. After flat plate magnetic
separation, the Fe ₂ O Ⅲ content of the sand material can be controlled below
150ppm, meeting the requirements of the second grade sand for sheet
materials.
The refined sand after magnetic separation needs to be dehydrated. Shanlu
Heavy Industry has chosen BTC ceramic filter machine for this process. This
device utilizes the principle of capillary action, where the micropores on the
ceramic filter plate only allow water to pass through and solid particles are
intercepted. When the filter is running, the moisture content of the filter cake
can be as low as 8% -10%, and it can be directly stored without drying. Compared
to traditional belt filters, BTC ceramic filters have the characteristics of low
energy consumption, clear filtrate, and continuous operation. The filtered
tailings slurry can be sent to the thickener and combined with the front-end
overflow for treatment.
Each unit equipment can be centrally controlled by a PLC system. Shanlu Heavy
Industry is located in Shandong and has over 20 years of experience in mining
machinery design. Its products cover a full range of categories including
crushing, grinding, scrubbing, grading, magnetic separation, filtration, and
drying. Shanlu Heavy Industry can provide a "one mine, one strategy" selection
plan based on the customer's original sand particle size distribution and
finished product indicators.
In terms of equipment details, the lining plate of the wet rod mill's rod
compartment is made of high manganese steel casting, which has strong wear
resistance; The surface of the CX scrubbing machine impeller is covered with a
polyurethane layer, which extends its service life; The PBC flat magnetic
separator adopts a fully sealed structure to prevent slurry erosion; BTC ceramic
filter is equipped with a backwash system, and the ceramic plates can be
recycled for a long time. These designs reduce the daily maintenance costs for
customers.
If you need equipment parameters and process plans for sheet sand or
fracturing sand production lines, please call Manager Zhang at 13583776655 (same
as WeChat).