The classifier is an auxiliary mineral processing machine to be used for particle size separation in a pulp. The steady sand grading helps prevent closed-circuit grinding from getting out of control and thus improves the performance of the whole mineral processing facility.
Feed Size: 0–10 mm Capacity: 100–350 t/h (will vary with the model & working condition).
The classifier is widely used in a ball mill-closed circuit system. It separates coarse from fine mineral particles by their different settling speed in liquid.
Coarse particles are rejected as sand and the fine particles are carried through the overflow for the next stage. Material that is too large is directed back to the grinding process.
By maintaining a steady feed rate to a mill a classifier ensures the grinding to a required fineness while also enhancing the separation process.
Mineral classification at the grinding stage has a major impact on the overall mineral processing yield.
Classifying systems are one of the key unit operations with a major influence on grinding process efficiency and mineral recovery. Conventional classification systems are suffering from the following issues:
Classification is not highly accurate
Overflow size keeps changing
There is fine material being carried back with the returning sand which is going to increase the mill feed load
Blades are wearing out very quickly and are also prone to sticking up due to sticky material
Through improvement in both spiral geometry and the settled-up region of the classifier the Sanland Sprial classifier is able to do the following:
Gravities the settling of coarse particles and by the turning of the spiral these are being conveyed back to the milling section
Fine particles will flow out via the overflow
Adjustable parameters of classifier make it possible to switch between different size targets quickly in a minimum of material waste and with an optimal grinding loop.
Classification performance is further enhanced by fine-tuning the operation so that unnecessary looping and hence overgrinding is minimized in the system. In this manner, an efficient and a low-cost grinding system is maintained.
Type | Model | Spiral speed | Sand return capacity | Overflow capacity | Spiral diameter | Spiral length | Tank slope | Drive motor | Lifting motor | Weight | ||
Model | Power (kW) | Model | Power (kW) | |||||||||
High Weir | FLG-300 | 7.7 | 30–80 | 10–30 | φ300 | 3900 | 14–18 | Y100L1-4 | 2.2 | Manual | — | 668 |
Single Spiral | FLG-500 | 8 | 145–260 | 21–75 | φ500 | 4390 | 14–18 | Y112M-6 | 3 | — | — | 1600 |
| FLG-750 | 7.8 | 100–445 | 31–165 | φ750 | 5500 | 14–18 | Y132S-6 | 3 | — | — | 2716 |
| FLG-1000 | 6.7 | 473–1026 | 85 | φ1000 | 6556 | 14–18 | Y132M2-6 | 5.5 | — | — | 4000 |
| FLG-1200 | 5,6,7 | 1145–1600 | 150 | φ1200 | 6500 | 14–18 | Y132M2-6 | 5.5 | Y90L-4 | 1.5 | 7943 |
| FLG-1500 | 2.5,4,6 | 1140–2730 | 235 | φ1500 | 8265 | 14–18 | Y160M-6 | 7.5 | Y100L1-4 | 2.2 | 11827 |
| FLG-2000 | 3,6,5.5 | 3240–5940 | 400 | φ2000 | 8700 | 14–18 | Y160L-6/4 | 11,15 | Y100L2-4 | 3 | 20814 |
| FLG-2400 | 3.6 | 6800 | 580 | φ2400 | 9130 | 14–18 | Y200L2-6 | 22 | Y112M-4 | 4 | 24194 |
| FLG-3000 | 3.2 | 11625 | 890 | φ3000 | 12500 | 14–18 | Y200L-4 | 30 | Y112M-4 | 4 | 42188 |
High Weir | 2FLG-1200 | 5,6,7 | 2290–3200 | 310 | φ1200 | 6500 | 14–18 | Y132M2-6 | 5.5×2 | Y90L-4 | 1.5×2 | 15840 |
Double Spiral | 2FLG-1500 | 2.5,4,6 | 2240–5360 | 460 | φ1500 | 8230 | 14–18 | Y160M-6 | 7.5×2 | Y100L1-4 | 2.2×2 | 22903 |
| 2FLG-2000 | 3,6,5.5 | 6400–10800 | 750 | φ2000 | 8400 | 14–18 | Y160L-4 | 15×2 | Y100L2-4 | 3.0×2 | 34621 |
| 2FLG-2400 | 3.63 | 13600 | 1160 | φ2400 | 9130 | 14–18 | Y200L2-6 | 22×2 | Y112M-4 | 4×2 | 42460 |
| 2FLG-3000 | 3.2 | 23300 | 1785 | φ3000 | 12500 | 14–18 | Y200L-4 | 30×2 | Y112M-4 | 4.0×2 | 73030 |
The Sprial classifier minimizes the settling tank and spiral conveying structure, which will result in a better separation of coarse and fine particles. With that, they will prevent coarse particles in the overflow and fine particles being carried by sand.
The coarse particles will be timely fed back to the ball grinder, which keeps the closed grinding loop running consistently and stops overgrinding that is useless energy consumption.
The spiral blades and other critical wearing parts are made of wear-resistant materials which extend the service life of the Classifier machine in slurry environment.
With the structure being quite simple and the running being quite reliable, a daily maintenance job is only to check the spiral parts, bearings, and drive mechanism.
Classification occurs at the base of a tank where the slurry is admitted:
Coarse and dense particles quickly get to the bottom of the tank.
Spiral blades, while rotating, carry the settled minerals up the sloping tank.
Coarse mineral particles are redirected to the ball mill through the sand discharge nozzle.
Dissolved materials remain the suspended materials that can be removed through a discharge weir.
Mechanical classification by particle settling is continuous.
Ore hardness, particle size and grinding requirements differ from site to site, so the classification equipment needs to match the actual process conditions. Sanland evaluates the raw ore characteristics, ball mill size, target particle size and plant capacity, then provides spiral diameter selection, single or double spiral configuration, tank structure design and complete grinding-classification solutions.
To keep the Classifier running reliably for a long time:
Regularly check wear on the spiral blades.
Inspect bearing lubrication.
Prevent large foreign objects from entering the machine.
Keep the feed rate even.
Replace wear parts promptly according to wear condition.
Proper maintenance reduces downtime and extends the service life of the equipment.
Since 1988, Shenyang Sanland Mining Equipment Manufacture Co., Ltd. has been producing crushing, screening, mineral processing and material handling equipment from its base in Shenyang, China.
With production sites in Shenyang and Kaiyuan spanning 95,000 m² and a workforce of over 350, we control every step of manufacturing — casting, machining, welding, assembly and final testing — to ensure consistent quality.
Drawing on more than 30 years of experience, we have supplied over 110 complete crushing plants worldwide, with throughputs from 100 t/h up to 3,000 t/h. We also deliver tailored equipment, plant modernisation, process engineering, installation, commissioning and long-term technical support.
Our equipment is used in mining, quarrying and aggregate operations in more than 60 countries and regions, among them Chile, Peru, Australia, Saudi Arabia, Russia and Southeast Asia. Major customers include BHP, Vale, CODELCO, Anglo American, ANSTEEL, Philex Mining, China Gold and Huaxin Cement.
An overseas service centre in Ontario, Canada — staffed by local engineers and backed by a 3,000 m² spare-parts warehouse — provides installation assistance, rapid troubleshooting, parts supply and after-sales care.
Sanland offers overseas customers one-stop support throughout the project.
At the early stage we provide professional equipment selection based on ore characteristics and production targets. After delivery we supply installation guidance, commissioning, operator training and remote technical support.
With an overseas service network and spare-parts system, we continue to provide stable after-sales support for global customers.
For mining equipment exports we supply standard export packaging, international transport coordination, full shipment tracking and simultaneous spare-parts delivery. According to project scale we can supply single machines or complete mineral processing lines.
Project: Lead-zinc processing plant Location: Chile Industry: Processing of lead and zinc ores Material: Lead-zinc ores
Customer company has been involved in mining activities for a long time now and has been searching for a robust system of crushing, grinding, and classification which is stable. Sanland delivered the following equipment:
STPEF600×900 jaw crusher.
SS-B0917 cone crusher.
ST3YA1548 vibrating screen.
SCF1200 Sprial classifier.
The machines served as the customer’s mining crusher-crusher-screen-grind classifier line that is responsible for building a production system that can produce a continuous flow of goods.
Q: Can the Sprial classifier be used to wash sand and gravel with high clay content? A: Yes. The SCF series can remove clay and separate particles through spiral agitation and settling classification. Actual results depend on the clay content of the raw material and the process requirements.
Q: How do I choose the right model of Classifier? A: Selection should be based on capacity, ore properties, grinding flow and target classification size. Sanland can recommend a model according to the customer’s site conditions.
Q: Can the SCF work together with a ball mill? A: Yes. The Sprial classifier is commonly used in closed-circuit systems with ball mills. It returns coarse particles for further grinding and helps keep the grinding process stable.
Q: What certifications does the company hold? A: The company holds ISO 14001 Environmental Management System Certification, ISO 45001 Occupational Health and Safety Management System Certification, multiple AAA-level enterprise credit certifications, invention patents and intellectual property certificates. Additional certifications can be provided according to market requirements.
The Sprial classifier, Classifier, classifying, Mining equipment and High efficiency crusher range gives plants a practical way to stabilize slurry classification, improve grinding efficiency and keep closed-circuit production running more smoothly.
We are a professional manufacturer of mining machinery, specializing in the R&D and production of cone crushers, jaw crushers, and other mining crushing equipment. All equipment is manufactured and quality-controlled within our own production system, allowing us to directly address customer requirements and minimize intermediate links.
Yes. Our products can be supplied with internationally recognized certifications such as CE upon customer request. Our production processes strictly comply with quality management system requirements, ensuring that all equipment meets applicable safety and performance standards for export markets.
For standard models, we typically maintain a stable production cycle and complete delivery within 30 days. For customized configurations or special operating conditions, the lead time will be confirmed based on the specific solution. A clear production and delivery schedule will be provided upon order confirmation.
For complete machinery, the MOQ is generally one unit. For wear parts and accessories, the MOQ can be confirmed based on the specific model and requirements—please feel free to consult us for details.
Prior to shipment, all equipment undergoes anti-rust and anti-moisture treatment. We typically adopt wooden crates or reinforced packaging to ensure safe delivery during long-distance sea or land transportation.
We offer flexible shipping solutions including sea freight, land transportation, or multimodal transport, and we cooperate with customers or their designated freight forwarders to manage container loading and dispatch arrangements.
We generally support commonly used international payment methods such as T/T (telegraphic transfer). Specific payment terms can be negotiated based on the order value and cooperation circumstances.
Yes. We offer customized production and OEM services to meet specific customer requirements, including adjustments to equipment structure, technical parameters, and logo/branding customization.
Prior to order confirmation, we can provide product specifications, technical descriptions, application recommendations, and relevant images or documentation to help customers gain a thorough understanding of equipment performance and make informed procurement decisions.
