A brief introduction to sand dryer
Sand dryer, also known as sand drying machine, which is one of the practical industrial sand drying equipment, is mainly applied in the industries of beneficiation, building, metallurgy, chemical engineering and others.
It is used to dry the granular ore materials with certain moisture and has the features of stable running status, flexible operation, strong adaptation, and large capacity.
Applications of sand dryer
Sand dryer is mainly used for drying particle materials with certain humidity, such as all kinds of sand in foundry industry and dry-mixed mortar industry, clay with small particle size in building materials and cement industry, small particle size materials with no chemical changes, and heat and dust resistance materials in the chemical industry.
FTM sand dryer
Applied materials: It can be used for the drying of river sand, dry mixed mortar, cement slag, clay, coal gangue, mixture, fly ash, gypsum, iron powder, limestone, frac sand, etc.
| Common materials | Particle size | Drying temperature |
| River sand | 4-20 mm | 80-180°C |
| Quartz sand | 0.6-4 mm | 60-80°C |
| Limestone sand | 16-32 mm | 150-400°C |
| Aggregate | 4-32 mm | 250-750°C |
| Bauxite | 4-8 mm | 250-850°C |
| Clay | 0.2-1 mm | 50-150°C |
Structure of Fote sand dryer
Fote sand dryer is simple in its structure and mainly divided into 4 parts:
Drum body
The drum body is the main part of the sand drying machine. And it is equipped with the feed and discharge cases and sealing gaskets to prevent the heat from escaping.
The spiral plates are welded in the feed port, the lifting blades are equipped in the drum body, and the blocking ring is welded in the discharge port (to keep wet materials from discharging).
Support system
The support system consists of rollers, catch wheels and riding wheels, etc.
The rollers are placed around the barrel and rotate along with it.
The riding wheels support the barrel, while catch wheels prevent the barrel from displacement.
Transmission
The transmission system includes big gear, pinions, motor and gear reducer.
During the running process, the drum body is driven by motor through triangular belt, gear reducer, pinions and big gear.
Thermal systems
Fote Heavy Machinery has designed the thermal systems for customers from rainy, cold, variable-temperature countries and areas.
The thermal systems are mainly divided into two types: thermal cotton and galvanized thermal plate.
The thermal cotton is made of basalt, dolomite and binder by high-temperature melting. On the basis of insulation, the galvanized thermal plate can prevent rain, corrosion, and is suitable for rainy countries.
**Subsidiary machines of drying line
The drying line is composed of feeder, conveyor, ID fan (induced draft fan), air heating furnace and cyclone dust collector. By the way, the air heating furnace can be built to save certain costs.
In addition, gas generators, combustion chambers or supporting elevator, belt conveyors, dosing feeding machine, cyclone dust collectors, and induced draft fans can be designed according to users' needs.
Fote sand dryers' advantages
FTM dryers' superiority
Strong wear-resistance
The main wear parts of the dryers are the drum body and the lifting plates. All of them are made of wear-resisting manganese plates, which is 3 to 4 times as the wear resistance of ordinary steel plate.
For soft materials, the lifting plate can be welded in the barrel, while for hard materials, the lifting plate would better to be attached by bolts so as to facilitate replacement.
High drying efficiency
Stainless steel gaskets are used for sealing at both ports, which can efficiently prevent heat from escaping and improve the utilization of the hot gas generated by the heat source and increase the drying efficiency.
The initial moisture content of the material is 15%, and the final moisture is guaranteed to be 0.5-1% or less. It is the first-choice product for various drying projects such as river sand, cement slag powder and dry mortar production line.
Extensive applications
The sand dryer has a drying temperature that can reach up to 800°C so that it can be used to dry bulks, particles and powders with a volume of 20 mm to 40 mm.
- It can be used for various sand and stones, such as river sand, quartz sand, aggregate, frac sand and limestones.
- It can be used for ore beneficiation, such as iron ore, copper ore, manganese ore and gold ore.
- It can be used to drying industrial raw materials such as gypsum, kaolin, clay, coal.
Stable performance
The sand dryers adopt a unique internal structure, which can effectively avoid materials sticking to the inner plate, make it more adaptable to various materials.
It can reduce the degree of wear on the internal parts, making a more stable running status and high production efficiency.
Sand dryer's working principle
The heat source of the sand dryers comes from the air heating furnace (it can be solid fuel, liquid fuel, gas fuel, heat carrier and electric energy), and the sand dryer adopts the downstream or countercurrent heating mode.
Sand dryer's working principle
The material enters the barrel from the inlet and is pushed to the discharge port by the spiral plate (the dryer' cylinder is at an angle of 5° from the ground for easy discharging).
The material is repeatedly lifted by the lifting plate, carried to the top of the barrel and then continuously spread down, and fully contacts with the hot airflow. Then the moisture contained is gradually dried to achieve the purpose of drying.
4 factors affecting the efficiency of sand dryers
Heat source
If the heat source is different when drying sand, the temperature inside the furnace is different, resulting in a varied-temperature airflow in the dryers.
If the temperature is too low, the drying time will be long, and the output of the equipment will also be affected.
Rotation speed of barrel
In general, the rotation speed of the barrel determines the drying time of the product. The faster the rotation speed is, the faster the materials move inside, and discharged from the barrel.
Evaporation intensity of materials
Different materials have different evaporation intensity, which will affect the drying efficiency. The more evaporation intensity of material has, the more efficiently the dryers are.
Some materials' evaporation intensity
| Materials | Evaporation intensity | Materials | Evaporation intensity |
| River sand | 80-120 | Wood chips | 30-35 |
| Silica sand | 80-100 | Saw dust | 30-60 |
| Pyrites | 40-60 | Slag | 35-55 |
| Coal | 35-40 | Limestone | 40-60 |
| Phosphorite | 44-50 | Gypsum | 30-35 |
| Kaolin | 50-55 | Kieselguhr | 50-60 |
Degree of moisture
Generally, the fluid material is inadvisable to conveying into the dryer equipment, or it will cause the waste of heat resources.
Under certain conditions, if it contains too much water and is in a fluid state, there can be a filter press equipped in front of the dryers, which can remove a lot of water and improve the working efficiency of the later process.
Fote customer cases from India
In January 2019, a customer from India contacted the customer service staff of Fote Heavy Machinery, hoping that we could provide him with a set of river sand dryer equipment. According to the data and information provided by the customer, Fote technicians advised him with a suitable dryer equipment.
FTM dryer's working site in India
The specific data is as follows:
- Processing materials: River sand
- Initial humidity: 8%-10%
- Final humidity: 1%
- Production capacity: 76 t/h
- Maximum temperature: 800°C
- Auxiliary equipment: Feeder, feed conveyor, discharge conveyor, induced draft fan, hot blast stove and cyclone.
- Customer's feedback: The production line has a high heat utilization rate and less heat loss. And the whole drying process adopts automatic operation mode, saving a lot of labor costs.
Fote river sand dryers for sale
Since its establishment, Fote Heavy Machinery has been adhering to the principle of customer first, paying much more attention to product quality and focusing on cultivating outstanding talents. It has grown into a leading mining machinery manufacturer at home and abroad.
The main sand dryer machines produced by Fote are rotary dryer, mesh belt dryer, vertical dryer, double-drum dryer, slime dryer, indirect heat transfer dryer, etc.
The company has modern management mechanism, processing equipment, perfect testing methods, high-quality scientific research personnel with high-quality tracking service, and provides customers with advanced and economical technical services with a high degree of professionalism.
Parameter
|
Spec./m
(Dia.×Length) |
Shell Cubage
(m³) |
Capacity
(t/h) |
Installation
Obliquity (%) |
Highest Inlet
Air Temperature (℃) |
Main Motor
(kw) |
Weight
(t) |
|
Φ1.2×8.0
|
9.0
|
1.9～2.4
|
3～5
|
700～800
|
7.5
|
9
|
|
Φ1.2×10
|
11.3
|
2.4～3.0
|
3～5
|
700～800
|
7.5
|
11
|
|
Φ1.5×12
|
21.2
|
4.5～5.7
|
3～5
|
700～800
|
15
|
18.5
|
|
Φ1.5×14
|
24.7
|
5.3～6.6
|
3～5
|
700～800
|
15
|
19.7
|
|
Φ1.5×15
|
26.5
|
5.7～7.1
|
3～5
|
700～800
|
15
|
20.5
|
|
Φ1.8×12
|
30.5
|
6.5～8.1
|
3～5
|
700～800
|
18.5
|
21.5
|
|
Φ1.8×14
|
35.6
|
7.6～9.5
|
3～5
|
700～800
|
18.5
|
23
|
|
Φ2.2×12
|
45.6
|
9.7～12.2
|
3～5
|
700～800
|
22
|
33.5
|
|
Φ2.2×14
|
53.2
|
11.4～14.2
|
3～5
|
700～800
|
22
|
36
|
|
Φ2.2×16
|
60.8
|
13.0～16.2
|
3～5
|
700～800
|
22
|
38
|
|
Φ2.4×14
|
63.3
|
13.5～16.9
|
3～5
|
700～800
|
37
|
45
|
|
Φ2.4×18
|
81.4
|
17.4～21.7
|
3～5
|
700～800
|
37
|
49
|
|
Φ2.4×20
|
90.4
|
19.3～24.1
|
3～5
|
700～800
|
45
|
54
|
|
Φ2.4×22
|
99.5
|
21.2～26.5
|
3～5
|
700～800
|
45
|
58
|
|
Φ2.6×24
|
127.4
|
27.2～34.0
|
3～5
|
700～800
|
55
|
73
|
|
Φ3.0×20
|
141.3
|
30.1～37.7
|
3～5
|
700～800
|
75
|
85
|
|
Φ3.0×25
|
176.6
|
37.7～47.1
|
3～5
|
700～800
|
75
|
95
|
|
Φ3.2×25
|
201
|
42.9～53.6
|
3～5
|
700～800
|
90
|
110
|
|
Φ3.6×28
|
285
|
60.8～76.0
|
3～5
|
700～800
|
160
|
135
|
Technical parameters of indirect heat dryer:
| Shell diameter ×shell Length Items |
Inside diameter of outer shell (mm) |
Inside diameter of inner shell (mm) |
Shell Length (m) |
Shell cubage (m³) |
Shell obliquity |
Lifting blade form |
Highest inlet air temperature (℃) |
Dimensions (m) |
| Φ1.5×15m | 1500 | 500 | 15 | 20.27 | 3-5% | Lifting form | 850 | 16.2×2.7×2.7 |
| Φ1.5×17m | 17 | 22.97 | 18.2×2.7×2.7 | |||||
| Φ1.5×19m | 19 | 25.68 | 20.0×2.9×2.9 | |||||
| Φ1.8×21m | 1800 | 650 | 21 | 35.91 | 3-5% | Lifting form | 850 | 22.5×2.7×2.7 |
| Φ1.8×23m | 23 | 39.33 | 24.5×2.9×2.9 | |||||
| Φ1.8×25m | 25 | 42.75 | 26.5×2.9×2.9 | |||||
| Φ2.2×21m | 2200 | 800 | 21 | 58.10 | 3-5% | Lifting form | 850 | ---- |
| Φ2.2×23m | 23 | 63.61 | ||||||
| Φ2.2×25m | 25 | 69.15 |
|
Spec./m
(Dia.×Length) |
Shell Cubage
(m³) |
Capacity
(t/h) |
|
Φ1.2×8.0
|
9.0
|
1.9～2.4
|
|
Φ1.2×10
|
11.3
|
2.4～3.0
|
|
Φ1.5×12
|
21.2
|
4.5～5.7
|
|
Φ1.5×14
|
24.7
|
5.3～6.6
|
|
Φ1.5×15
|
26.5
|
5.7～7.1
|
|
Φ1.8×12
|
30.5
|
6.5～8.1
|
|
Φ1.8×14
|
35.6
|
7.6～9.5
|
|
Φ2.2×12
|
45.6
|
9.7～12.2
|
|
Φ2.2×14
|
53.2
|
11.4～14.2
|
|
Φ2.2×16
|
60.8
|
13.0～16.2
|
|
Φ2.4×14
|
63.3
|
13.5～16.9
|
|
Φ2.4×18
|
81.4
|
17.4～21.7
|
|
Φ2.4×20
|
90.4
|
19.3～24.1
|
|
Φ2.4×22
|
99.5
|
21.2～26.5
|
|
Φ2.6×24
|
127.4
|
27.2～34.0
|
|
Φ3.0×20
|
141.3
|
30.1～37.7
|
|
Φ3.0×25
|
176.6
|
37.7～47.1
|
|
Φ3.2×25
|
201
|
42.9～53.6
|
|
Φ3.6×28
|
285
|
60.8～76.0
|
Technical parameters of indirect heat dryer:
| Shell diameter ×shell Length Items |
Inside diameter of outer shell (mm) |
Inside diameter of inner shell (mm) |
Shell cubage (m³) |
| Φ1.5×15m | 1500 | 500 | 20.27 |
| Φ1.5×17m | 22.97 | ||
| Φ1.5×19m | 25.68 | ||
| Φ1.8×21m | 1800 | 650 | 35.91 |
| Φ1.8×23m | 39.33 | ||
| Φ1.8×25m | 42.75 | ||
| Φ2.2×21m | 2200 | 800 | 58.10 |
| Φ2.2×23m | 63.61 | ||
| Φ2.2×25m | 69.15 |
