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Gu Xin Double-Layer Free-Fall Mineral Powder Color Sorter

The Guxin double‑stage free‑fall powder color sorter features a dual‑path discharge design that significantly boosts per‑unit throughput. Equipped with high‑resolution CCD vision and AI‑driven intelligent algorithms, it precisely sorts mineral powders of various mesh sizes, efficiently removing foreign colors, specks, and impurities. With stable operation, low carry‑over rates, and reduced energy and maintenance costs, it is a core piece of equipment for powder purification and quality enhancement.

Keywords：Gu Xin Double-Layer Free-Fall Mineral Powder Color Sorter

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Double-layer free-fall powder feeder

The Guxin double‑layer free‑fall mineral powder color sorter is a specialized sorting device designed for high‑purity, fine mineral powders. It focuses on powders ranging from 8 to 140 mesh (0.1–2.36 mm), featuring a slideless free‑fall design, dual‑stage re‑sorting, micron‑level detection, and ultra‑low carryover. It serves as the core purification equipment in production lines for photovoltaic/electronic‑grade quartz sand and premium calcium carbonate powder.

I. Core Application Scenarios

● Purification of High-Purity Quartz Sand: Photovoltaic glass sand, electronic-grade quartz powder, and fused quartz sand are free of yellow skin, black spots, gangue, and discolored particles, with a purity exceeding 99.99%, meeting the stringent requirements of the photovoltaic and semiconductor industries.
● Calcium carbonate/calcareous powder refining: Heavy calcium powder and ultrafine calcium powder are free of gray spots, discolored particles, and clay impurities, with a whiteness increase of 5–8 degrees, making them ideal as high-end fillers for coatings, plastics, and papermaking.
● Fine powder separation of non-metallic minerals: Potassium–sodium feldspar powder: removes iron and impurities, enhances whiteness, and is used as a ceramic glaze material. Kaolin/coal gangue powder: separates impurities, improving recovery rate and purity. Fluorite/barite/gypsum powder: eliminates fine waste rock particles, boosting concentrate grade. New energy and high-end building materials: industrial silicon/polycrystalline silicon fine powders undergo impurity removal; colored sands and glass cullet powders are sorted by color and decontaminated; natural sands are graded and purified. Coverage Complex operating conditions: high dust levels and extreme temperatures (−20°C to 40°C): enclosed, dust‑proof and waterproof design; 24/7 stable operation.

II. Model and Technical Specifications

Product model	KS4-GX768		FLD6-128
Number of channels	768		1536
Production (t)	16–26 mesh	3-6	16–26 mesh	4-10
	26–40 mesh	2.5-5	26–40 mesh	3.5-8
	40–70 mesh	2-4	40–70 mesh	3-6
	70–140 mesh	1-2	70–140 mesh	1-3
Purification rate (%)	≥99.9		≥99.9
Power supply voltage (V/Hz)	220(50HZ)		220(50HZ)
Power (kW)	3.5		5.5
Air supply pressure (MPa)	0.2-0.4		0.2-0.3
Air consumption (L/min)	<3		<3
Machine weight (kg)	1600		2500
External dimensions (Length × Width × Height) (mm)	248018002300		269018202590

Note: The above production figures are based on quartz sand as an example.

III. Types of Separable Powder Materials

Non-metallic minerals: quartz sand, plate‑type sand, glass sand, high-purity quartz sand, alumina sand, potassium feldspar powder, calcareous sand, natural sand, sea sand, river sand, polymer materials, and more.

IV. Particle Size Range for Sorting

Standard mesh range: 8–140 mesh (0.1 mm–2.36 mm), covering materials from coarse to ultra-fine powders.

V. Core Competitive Advantages

● Double-layer free fall, an industry-first: With a slide‑free design, materials experience zero friction, preventing jamming and material buildup. The dual‑layer independent sorting combined with secondary re‑sorting boosts efficiency by more than 50% compared to single‑layer systems, while the carryover rate is ≤0.8% (industry average: 3%).
●AI + multispectral micron-level recognition: 5400‑pixel high‑speed CCD plus multispectral imaging captures contaminants down to 0.01 mm. Powered by AI deep learning, it resists interference from lighting, dust, and humidity, ensuring long‑term stability. Sorting accuracy is ≥99.95%, with a miss‑and‑false‑reject rate of <0.05%. Enhanced dust‑ and water‑proofing makes it suitable for high‑dust environments and operating temperatures ranging from –20°C to 40°C. Featuring a wear‑free chute design, it requires no maintenance for two years, reducing O&M costs by more than 60%.
● High capacity + low energy consumption, efficient and economical: Production capacity: 2–10 tons per hour. Total machine power ≤ 5.5 kW, with energy consumption more than 35% lower than comparable models. Modular design for easy disassembly and assembly, with universally compatible spare parts.
● Full-grain compatibility + multi-purpose functionality: Covers the full particle size range from 8 to 140 mesh, eliminating the need for multiple classifiers; compatible with hundreds of types of mineral powders, offering exceptional versatility.

VI. The Tangible Value Delivered to Customers

● Quality Enhancement and Price Premium: Quartz sand: purity exceeding 99.99%, with a price increase of over 35%. Calcium carbonate: whiteness improved by 5–8 degrees, impurities below 0.1%, targeting the high-end market.
● Cost reduction and efficiency improvement: Replaces 40–60 workers, saving over one million yuan annually in labor costs. Reduces grinding and screening losses, lowering overall mineral processing costs by more than 28%.
● Increase the recovery rate: The grade of the concentrate is ≤0.8%, the recovery rate has improved by 7–13 percentage points, and tailings discharge has been reduced.
● Streamlined processes + rapid production launch: Multi-stage screening, with production ramp-up within 5 days; occupies approximately 7 m² and is compatible with compact production lines. Stable quality + strong competitiveness: fully automated and standardized, ensuring consistent product purity and whiteness, while enhancing the ability to fulfill high-end orders.

VII. On-site at Certain Customers’ Premises