Cone Classifier

High-Efficiency Cone Classifier & Desliming Hopper

The Cone Classifier, commonly known as a Desliming Hopper, is one of the most cost-effective pieces of equipment in a mineral processing plant. Utilizing a simple inverted conical design, it relies entirely on fluid dynamics and gravity to classify, deslime, and thicken mineral slurries.

Because it requires zero power and has no moving parts, this Hydraulic Classifier offers an incredible return on investment with virtually nonexistent operating and maintenance costs. It plays a critical role in hydraulic classification, acting as a pre-treatment buffer to remove excess water and useless slime (ultra-fine clay) from the ore.

By controlling the slurry concentration and removing interfering slimes, our Slurry Thickener significantly improves the processing efficiency and recovery rates of downstream equipment, such as Shaking Tables, Spiral Chutes, and Flotation Machines.

Core Advantages of Our Hydrocone Classifier

• Zero OPEX (Operating Expense): It operates entirely on gravity and fluid pressure. With no motors, belts, or moving parts, the energy consumption is zero, and maintenance is essentially limited to occasional cleaning.
• Fine Classification: Capable of achieving highly precise, fine grading sizes down to 75μm or less, ensuring ultra-fine slimes are effectively separated from valuable granular ore.
• 3-in-1 Functionality: It simultaneously performs three critical tasks: classifying (separating coarse from fine), desliming (washing away clay/mud), and thickening (reducing the water content of the underflow).
• Surge Capacity: The large volume of the inverted cone acts as an excellent buffer tank, providing stable, steady feed conditions to downstream separation equipment even if the upstream flow fluctuates.

How a Cone Classifier Works

The principle is based on the differential settling velocities of particles in a fluid medium.

1. Slurry Feeding: The liquid slurry is fed into the central feeding cylinder (often tangentially to create a gentle cyclone effect).
2. Buffer & Diffusion: The slurry hits the bottom edge of the feeding cylinder, buffering its velocity, and then diffuses radially outward toward the cone walls.
3. Sedimentation (Underflow): Heavier, coarser mineral particles overcome the upward flow of water and settle at the bottom of the inverted cone, forming a thickened "sedimentary sand."
4. Overflow Discharge: Lighter, ultra-fine particles (slimes) and excess water cannot settle and are pushed upward, discharging over the lip into the peripheral overflow launder.
5. Sediment Discharge: The thickened, deslimed coarse ore is discharged through the bottom spigot (sand discharge port), ready for the next processing stage.

Application Areas in Mineral Processing

• Gravity Separation Prep: Removing sticky slimes that would otherwise interfere with the settling of heavy minerals on Shaking Tables.
• Flotation Circuits: Controlling slurry concentration (thickening) to ensure the ideal solid-to-liquid ratio enters the flotation cells.
• Grinding Circuits: Acting as a primary classifier to quickly separate finished fines before they enter a Spiral Classifier or hydrocyclone.
• Tailings Treatment: Preliminary thickening and dewatering of waste slurry before it is pumped to tailings ponds.

Technical Specifications

Below are the standard parameters based on the diameter of the cone. Custom sizes can be manufactured based on your plant's volume requirements.

Frequently Asked Questions (FAQ)