Float glass, photovoltaic glass, and daily-use glass have strict standards
for the particle size, iron content, and chemical composition of quartz sand.
Shanlu Heavy Industry provides specialized production line equipment for glass
sand, including crushing, screening, grinding, magnetic separation, grading, and
dehydration. It is suitable for the production of silica sand for glass in the
20-140 mesh range and meets the requirements for first grade float glass with Fe
₂ O3 content ≤ 120ppm and SiO ₂ content ≥ 98.5%.
Taking the typical wet processing route of glass sand as an example: the raw
ore is roughly crushed to below 30mm by a jaw crusher, and then sent to a ZSW
high-purity horizontal sand making machine for medium and fine crushing by a
belt conveyor. The equipment adopts a horizontal structure, and the discharge
particle size can be controlled within the range of 1-5mm. The over crushing
ratio is low, which is beneficial for particle size control in subsequent
grinding processes. The crushed material is fed into a wet rod mill through a
vibrating feeder for grinding. Unlike ball mills, rod mills use cylinders with
appropriate aspect ratios and steel rod media to grind through linear contact,
resulting in a concentrated particle size distribution of the discharged
material. The wet rod mill designed by Shanlu Heavy Industry can grind materials
to the range of 20-140 mesh, accounting for more than 80%, and has less over
crushing phenomenon, which helps to control the fine powder content.
After grinding, the slurry flows automatically into the YBF square swing
screen for precise classification. The screening machine adopts planar rotary
motion, and the screening efficiency is stable at over 95%. Glass sand has high
requirements for particle size concentration, usually requiring a proportion of
no less than 75% between two to three adjacent sieve sizes. Shanlu Heavy
Industry can separate standard sand ranges such as 20-40 mesh, 40-70 mesh, and
70-140 mesh at once by optimizing the sieve configuration. Screen the coarse
particles and return them to the rod mill for further grinding, forming an open
or closed circuit grinding system.
The qualified slurry after classification enters the magnetic separation
process for iron removal. Shanlu Heavy Industry is equipped with CTB permanent
magnet drum wet magnetic separator in the production line for preliminary iron
removal. The magnetic field strength on the drum surface is 4000Gs, which can
effectively remove strong magnetic minerals such as magnetite. After preliminary
selection, the slurry enters the LHC vertical ring high gradient magnetic
separator for deep iron removal, with a background field strength of 1.5T. The
magnetic medium in the sorting chamber can capture fine weakly magnetic iron and
titanium impurities. After two-stage magnetic separation, the Fe ₂ O Ⅲ content
of the sand material can be reduced to below 100ppm, meeting the sand standard
for float glass. The refined sand after magnetic separation enters the DTS
vibrating dewatering screen for dewatering. Double layer polyurethane screen
surface, high-frequency vibration, and the moisture content of the dehydrated
sand material can be controlled within 15%.
In terms of tailings treatment on the production line, Shanlu Heavy Industry
is equipped with a dry discharge system consisting of NM thickener and BK
high-pressure diaphragm plate frame filter press. The thickener increases the
concentration of the tailings slurry from 5% -10% to 45% -50%, and the bottom
flow is sent to the filter press for pressing until the moisture content is
below 12%, forming a dry cake. Overflow water and filtrate reflux to the
front-end grinding or magnetic separation process for recycling, with a water
recycling utilization rate of over 90%.
For glass sand that needs to be dried and packaged or transported over long
distances, Shanlu Heavy Industry can add a HGS three return drum dryer for
drying treatment after dehydration. The moisture content of the discharge can be
controlled within 0.5% to meet the anti freezing requirements for long-distance
transportation.
Shanlu Heavy Industry is located in Shandong and has over 20 years of
experience in designing and manufacturing mining machinery. Its products cover a
full range of categories including crushing, screening, grinding, magnetic
separation, dehydration, drying, and pressure filtration. Shanlu Heavy Industry
can provide customized services from single machine selection to whole line
integration based on the characteristics of customers' original sand and mineral
sources and the requirements of finished glass sand indicators.
In terms of equipment details, the lining plate of the wet bar mill is made
of high wear-resistant alloy casting, which has a long service life; YBF swing
screen mesh tensioning device achieves rapid screen replacement; The CTB
magnetic separator cylinder is coated with wear-resistant stainless steel to
prevent slurry erosion; The excitation coil of the LHC magnetic separator
separates water and electricity, and the temperature rise is controllable; DTS
dewatering screen vibration motor is a well-known brand, running smoothly; The
filter plate of BK filter press is made of reinforced polypropylene material,
which is corrosion-resistant. These designs reduce the daily maintenance costs
for customers.
If you need equipment parameters or incoming material test data for the glass
sand production line, please call Manager Zhang at 13583776655 (same as
WeChat).