I. Product Positioning

● Equipment positioning: A high-end, specialized color sorter for photovoltaic and electronic-grade metallurgical silicon, suitable for both dry and wet processing, emphasizing ultra-high precision, low breakage, minimal carry‑over, and high throughput.  
● Target customers: metallurgical silicon mines, industrial silicon smelters, photovoltaic-grade polysilicon and monocrystalline silicon raw material plants, electronic-grade silicon feedstock purification companies, and silicon slag recycling facilities.

II. Application Scenarios

● Photovoltaic-grade metallurgical silicon: free of yellow skin, black skin, oxide layers, silicon slag, and iron/aluminum impurities, with a purity exceeding 99.99%, suitable for polycrystalline silicon ingot casting and monocrystalline silicon rod pulling.  
● Electronic-grade high-purity silicon: removes trace colored particles, metallic inclusions, and microcrystalline impurities, meeting the requirements for semiconductor/chip-grade silicon.  
● Industrial silicon/alloy silicon: Refining industrial silicon grades such as 553, 441, and 3303 to reduce iron, aluminum, and calcium content and enhance alloy quality.  
● Silicon slag recovery in metallurgy: Recovering elemental silicon particles from metallurgical slag, with a purity of ≥99% after sorting, thereby enhancing resource utilization.  
● Pre‑treatment of granular silicon: After crushing, a preliminary screening is conducted to remove waste rock and impurities in advance, thereby reducing the costs of subsequent grinding, magnetic separation, and acid leaching.

III. Particle Size Classification

● Dry separation: 1 mm to 150 mm (covering everything from fine particles to large chunks)  
● Wet sorting: 10 mm–80 mm (sorted directly after washing, no drying required; moisture content ≤ 15%)  
● Mixed grading: five size ranges are available—1–5 mm, 5–10 mm, 10–30 mm, 30–50 mm, and 50–80 mm.

IV. Technical Parameters

Note: The above products are based on a particle size of 1–5 cm, with up to 5% impurities.

V. Core Advantages

● AI‑powered multispectral ultra‑precise detection: 4K line‑scan CCD, infrared illumination, and full‑spectrum LEDs enable the identification of 0.1 mm micro‑black spots, yellow skin, oxidation layers, and silicon slag. Color sorting, shape analysis, and spectral analysis are combined for three‑dimensional judgment, accurately distinguishing metallic silicon from silica, feldspar, and iron‑manganese impurities. A proprietary metal‑silicon impurity database ensures adaptive performance across different ore sources and smelting batches, with an identification rate of ≥99.5%.  
● Dual‑layer conveyor belt with a low‑breakage design: coarse sorting on the upper layer and fine sorting on the lower layer, achieving a sorting accuracy of ≥99% and a throughput of 10–35 tons per hour. Food‑grade silicone rubber tracks ensure low friction, impact resistance, and a breakage rate of ≤0.5%, preserving the crystalline structure of silicon wafers. The system features a sealed, dust‑proof, and waterproof enclosure, making it suitable for extreme cold conditions in Northwest China as well as the hot, humid environments of Southeast Asia, ensuring stable year‑round operation.  
● Extremely low carry‑over ratio + high product yield: high‑speed, high‑frequency solenoid valves (response time ≤ 0.8 ms), with a carry‑over ratio of ≤ 1.5% and minimal loss of valuable material. Pre‑removal of waste rock by 30%–70% reduces subsequent grinding energy consumption by more than 20% and boosts product yield by 6%–10%.  
● Dual‑mode dry/wet operation with high efficiency and energy savings: dry sorting achieves moisture content ≤3%; wet sorting yields 8%–15% moisture, followed by direct color sorting after washing, eliminating the need for drying and reducing drying costs. Equipped with a self‑cleaning brush and high‑pressure air, it prevents clogging and eliminates downtime, cutting maintenance requirements by 80%. The unit’s total power consumption is 7.5 kW, with electricity use per ton of material ≤0.5 kWh, delivering energy efficiency and environmental protection.  
● Stable and Durable + Intelligent Operations: 75% of core components are imported, with a service life exceeding 20 years and a low failure rate; remote app monitoring plus AI‑driven self‑diagnosis enable operators to become fully operational after just 30 minutes of training, reducing labor costs by 80%.

VI. Technical Advantages

1. Image Processing System  
Cutting-edge DSP and FPGA processing technologies, combined with color‑ and spatial‑based multi‑mode complex algorithms, deliver “color sorting + shape sorting” capabilities tailored to various materials. With freely configurable modes, you can select from tens of thousands of material types.  
2. Camera Acquisition System  
Imported high-precision camera lenses ensure image clarity and accuracy. Equipped with an imported, high-precision 5400-pixel high-speed linear full-color smart CCD, it delivers high-definition recognition and rapid sorting.  
3. Self-priming nozzle
Equipped with a professional high-speed air valve, it delivers rapid actuation, low power consumption, and extended service life. It reduces air consumption, offers faster response, more precise impact, lower carry‑over ratio, and higher throughput. Its service life exceeds 10 billion cycles.  
4. Light Source System  
LED optical design system, with multiple light source options to suit different materials. It addresses issues such as high temperatures, significant power loss, and shortened lifespan that can arise from prolonged use of LED sources, ensuring long-lasting durability under stable temperature conditions.  
5. Feeding System  
An advanced material-feeding detection system is employed to ensure uniform material flow.  
6. Crawler Conveyor  
It employs a tracked conveyor system, delivering excellent color‑sorting performance and stable material transport, which effectively increases the carry‑over ratio and sorting purity while also significantly reducing material breakage during the color‑sorting process.  
7. Wide range of applications  
Corresponding operating modes have been designed for different materials, enabling a single machine to perform color sorting across various materials.  
8. Simple and easy to operate  
Touchscreen displays from professional manufacturers, an intuitive human–machine interface, and a clear, easy-to-read operation menu, combined with simplified settings, enable users to quickly master the various functions of the color sorter.

VII. Color Sorting Site