The spiral classifier, also known as the classifier or horizontal spiral classifier, is a type of equipment used in ore processing plants. It is used for mechanical classification based on the principle that solid particles have different specific gravities and therefore precipitate at different rates in a liquid. The spiral classifier is particularly effective for treating alluvial placer deposits, especially those with high dissociation degrees and flat-shaped mineral particles. It is commonly used in conjunction with ball mills for mineral processing. The classifier is characterized by its simple structure, reliable operation, ease of use, high efficiency, and energy-saving capabilities.
The spiral classifier offers several advantages:
Large processing capacity: It can handle a significant amount of ore, making it suitable for high-volume processing.
Simple structure and low total cost: The spiral classifier has a straightforward design and is cost-effective to operate and maintain.
Reliable work and convenient operation: The classifier operates reliably, and its operation and maintenance are convenient.
Good classification and washing effect: The spiral classifier effectively separates and cleans the ore, ensuring a high-quality end product.
Low abrasion resistance and loss: The spiral shaft of the classifier has low wear and tear, resulting in minimal material loss.
Fine granularity and low anti-sand rate: The classifier produces fine-grained materials and has a low rate of sand contamination.
Integrated functionality: The equipment combines ore washing, dewatering, desilting, and particle size control, resulting in higher classification efficiency and easier operation.
The working principle of a spiral classifier is based on the difference in the size and specific gravity of solid particles.
Here is a step-by-step explanation:
The mixture of ore particles and water is fed into the classifier tank from the bottom.
As the spiral rotates, the fine ore particles with lower specific gravity float in the water and overflow through the overflow weir at the top of the tank.
Meanwhile, the coarse ore particles with higher specific gravity sink to the bottom and are conveyed upward by the spiral to be discharged through the discharge valve.
The fine material that overflows from the classifier is directed to further processing, usually passing through a mill for grinding.
The coarse material discharged from the bottom is often referred to as “underflow” and can be directed to subsequent stages of processing or disposed of.
By this process, the spiral classifier separates and classifies the ore particles based on their size and specific gravity, ensuring that the finer particles are properly processed while removing the coarser particles.
The structure of a spiral classifier typically consists of the following components:
Base: The base is made of channel steel and provides stability for the classifier.
Body: The body is welded with steel plates and forms the main structure of the classifier.
Screw Shaft: The screw shaft is a central component of the classifier. It is responsible for the transportation of ore particles and is equipped with a water inlet head, a shaft head, and a wear-resistant pig iron sleeve.
Lifting Device: The lifting device is used to adjust the height of the spiral classifier. It can be either electric or manual, allowing for easy operation.
Transmission Device: The transmission device provides power to the screw shaft, enabling its rotation. It is typically driven by an electric motor or a hydraulic motor.
Spiral Groove: The spiral groove is formed by the spiral blade attached to the screw shaft. It allows the ore particles to be transported upward while separating and classifying them based on their size and specific gravity.
Lower Support (Bearing Bush): The lower support serves as a bearing for the screw shaft, ensuring smooth rotation and stability.
Discharge Valve: The discharge valve is used to control the flow of the coarse material that sinks to the bottom of the classifier. It allows for the discharge of the underflow or directs it to subsequent processing stages.
Tips:
To ensure the efficient and continuous operation of a spiral classifier, it is important to conduct regular inspections and maintenance work.Here are a few key points listed by Zoneding Machine, a spiral classifier manufacturer, for users to consider:
Lubrication System: Pay attention to the lubrication of the spiral classifier. Check and add lubricating oil regularly to ensure that the various parts of the equipment are well-lubricated. This helps to reduce friction, improve efficiency, and prolong the service life of the equipment.
Body Parts: Regularly inspect the various parts of the spiral classifier’s body. Check for any signs of wear, damage, or loose connections. This includes examining the base, body structure, screw shaft, spiral groove, and discharge valve. Address any issues promptly to prevent further damage and ensure proper functioning.
Electrical Device: Inspect the electrical devices of the spiral classifier, such as the motor, control panel, and wiring. Check for any loose connections, signs of overheating, or abnormal sounds. Ensure that the electrical components are functioning properly and address any electrical issues accordingly.
By paying attention to these key areas, users can help maintain the performance and reliability of the spiral classifier, allowing for efficient and continuous operation.
Zoneding Machine produces high-quality horizontal spiral classifiers that come in a wide range of specifications and models, catering to the production needs of large, medium, and small enterprises. These spiral classifiers are not only guaranteed in terms of quality but also offered at an affordable price. By using Zoneding Machine spiral classifiers, enterprises can effectively reduce their investment costs and increase their income. This enables customers to recover their investment costs more quickly, making the equipment a valuable investment for their operations.
China Screw Classifier Manufacturing Plant
Zoneding Machine, a reputable spiral classifier manufacturer based in China, offers a wide range of models at reasonable prices. They provide considerate customer service and have a comprehensive selection, including sand classifiers and spiral classifiers for gold, copper, zinc, lead, and more. If you are interested in obtaining the latest quotation or have any inquiries, you can chat with their representatives online, leave a message below, or send them an email. Thank you for considering Zoneding Machine for your spiral classifier needs.
General Specification
Model
Spiral Diameter (mm)
Trough Length (mm)
Spiral rotate speed (r/min)
Processing capacity(t/d)
Motor Power (kw)
Dimensions (mm≤)
Total weight (t)
Sand -return
Overflow
For driving
For lifting
Length
Width
Height
FG-3
300
3000
12-30
80-150
20
1.1
—-
3850
490
1140
0.7
FG-5
500
4500
8-12.5
135-210
32
1.1
—-
5430
680
1480
1.9
FG-7
750
5500
6-10
340-570
65
3
—-
6720
980
1820
3.1
FG-10
1000
6500
5-8
675-1080
110
5.5
—-
7590
1240
2380
4.9
FC-10
8400
675-1080
85
7.5
—-
9600
1240
2680
6.2
FG-12
1200
6500
4-6
1170-1870
155
7.5
2.2
8180
1570
3110
8.5
FC-12
8400
1170-1870
120
7.5
2.2
10370
1540
3920
11.0
2FG-12
6500
2340-3740
310
15
4.4
8230
2790
3110
15.8
2FC-12
8400
2340-3740
240
15
4.4
10370
2790
3920
17.6
FG-15
1500
8300
4-6
1830-2740
235
7.5
2.2
10410
1880
4080
12.5
FC-15
10500
1830-2740
185
7.5
2.2
12670
1820
4890
16.8
2FG-15
8300
2280-5480
470
15
4.4
10410
3390
4080
22.1
2FC-15
10500
2280-5480
370
15
4.4
12670
3370
4890
30.7
FG-20
2000
8400
3.6-5.5
3290-5940
400
11-15
3
10790
2530
4490
20.5
FC-20
12900
3210-5940
320
11-15
3
15610
2530
5340
28.5
2FG-20
8400
7780-11880
800
22-30
6
11000
4600
4490
35.5
2FC-20
12900
7780-11880
640
22-30
6
15760
4600
5640
48.7
FG-24
2400
9130
3.67
6800
580
15
3
11650
2910
4970
26.8
FC-24
14130
6800
490
18.5
4
16580
2930
7190
41.0
2FG-24
9130
13600
1160
30
6
12710
5430
5690
45.8
2FC-24
14130
13700
910
37
8
17710
5430
8000
67.9
2FG-30
3000
12500
3.2
23300
1785
40
8
16020
6640
6350
73.0
2FC-30
14300
23300
1410
—-
—-
17091
—-
8680
84.8
Please note that the information provided is subject to change due to advancements in technology. Zoneding Machine reserves the right to make modifications without prior notice. The performance of their machines may vary depending on the specific application. For more detailed information, it is recommended to chat online with Zoneding engineers. They will be able to provide you with the most up-to-date and accurate information based on your specific requirements and needs.
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