Sandstone and the use of sandstone:
Sandstone (sometimes known as arenite) is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the common colours are tan, brown, yellow, red, gray, pink, white and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Sandstone has been used for domestic construction and housewares since prehistoric times, and continues to be used.Sandstone was a popular building material from ancient times. It is relatively soft, making it easy to carve. It has been widely used around the world in constructing temples, cathedrals, homes, and other buildings. It has also been used for artistic purposes to create ornamental fountains and statues.
There are five types of Shanghai CLIRIK sandstone mill, they are HGM80, HGM90, HGM100, HGM100A and HGM125. The finished production fineness can be reached 300meshes~3000meshes, 5-47 micron. The capacity (ton/hour) ranges from 0.4T/H to 12T/H.
Working principle of sandstone mill:
HGM series sandstone mill mainly consist of main unit, classifier, powder collector, dust cleaner, blower, muffler, sound-proof room, crusher, bucket elevator, storage hopper, and vibrating feeder.
After crushed by hammer crusher, the large materials become small ones and are sent to storage hopper by elevator, and then evenly sent to the upper distribution plate of the turnplate by vibrating feeder and sloping feeding pipe.
When the sandstone mill is at work, all the grinding rollers are rolling in the ring, and the materials are driven to the edge of the turnplate by the centrifugal force and fall down into the grinding chambers where the materials are repeatedly pressed, crushed and grinded by the rollers.
The high-pressure air blower constantly inhales air within the sandstone mill and, in turn, the airflow with crushed materials are brought to the classifier whose high-speed impeller will screen the airflow: the unqualified particle size will fall and return to the mill for being reground while the qualified particle size mixed with air will go into the cyclone powder collector. Most of the qualified powders will fall and exit from the discharging valve at the bottom; a small proportion of the fine powders, with airflow, moves to the dust cleaner, and clings to the surface of the filter bags. At the same time, the fine powders clinging to the surface fall down by the sudden vibration of the filter bags, which is caused by the instantly ejected high-pressure gas controlled by the pulse valve. The materials from the above two lots are sent by the conveyor at the bottom to get finished powders packed. In addition, filtered clean air will be emitted from the air outlet of muffler in the end.
Technical data of sandstone mill:
| Model | HGM80 | HGM90 | HGM100 | HGM100A | HGM125 |
| Ring Diameter(mm) | 800 | 930 | 1035 | 1035 | 1300 |
| Ring Number (PCS) | 3 | 3-4 | 3 | 4 | 4 |
| Roller Number(PCS) | 21 | 24-32 | 27 | 34-36 | 40-44 |
| Main Shaft Speed (r. p. min) | 230-240 | 200-220 | 180-200 | 180-200 | 135-155 |
| Input Size (mm) | ≤20 | ||||
| Finished Size (um) | 5-47(325-2500) | ||||
| Capacity (t/h) | 0.5-4.5 | 0.6-6.5 | 0.7-7 | 1-8.5 | 1.5-12 |
| Outlet Size L*W*H (m) | 13.9*4*6.2 | 14.7*4.8*7.2 | 18*4.6*8.6 | 18*4.6*8.6 | 14*9*10.25 |
| Motor powder (KW) | 145-165 | 185-204 | 263 | 263-290 | 380-430 |
Note: This specification is just referencing, any changes are subject to the products.
Features and advantages of sandstone mill:
l、 High efficiency
Under the same finished final size and the same motor power, the capacity of sandstone mill is twice as much as jet mill, mixing grinder and ball mill.
2、Long lifecycle of spare parts
The ring and roller are forged by special material with high utilization. Under the same grinding material and finish special size, the lifecycle of spare parts is about one year, which is 2-3times longer than impact mill or turbo mill. Furthermore, the lifetime can reach 2-5 years for grinding calcite carbonate.
3、High safety and reliability
As no rolling bearings or screws in grinding cavity, there are no problems caused by bolts shedding or rapid wear of bearings and seal components.
4、 High fineness and flexible adjustment
The final fineness of the grinding materials can be adjusted between 325 meshes and 3000 meshes, and the product fineness can reach D97≦5um.
5、Environment-friendly
The application of pulse deduster and muffler greatly alleviates dust pollution and noise.
