Gravity separation is widely used in the beneficiation of both metallic and non-metallic minerals, valued for its cost-effectiveness and minimal environmental impact.
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Gravity separation equipment is particularly suitable for processing coarse-grained materials with distinct differences in specific gravity. In this article, we will introduce an essential gravity separation equipment &#;the spiral chute.
1. What is the spiral chute&#;
A spiral chute is a gravity separation device that leverages the inertial centrifugal force generated by ore pulp as it flows through a spiraling motion to achieve the separation of light and heavy minerals.
Combining the advantages of a spiral concentrator, shaking table, and centrifugal concentrator, the spiral chute is highly efficient and widely recognized as the optimal equipment for mining and mineral processing.
Spiral Chute is the best equipment for mining and mineral processing, which combines the characteristics of the spiral concentrator, shaking table, and Centrifugal concentrator. It is made of fiberglass lined with wear-resistant polyurethane and corundum cover, light moisture-proof, anti-rust.
We manufacture two types of spiral chutes to meet diverse user need:
1)Fangcheng sipral chute with wear-resistant rubber line or polyurethane rubber liner
2) New type plastic spiral chute.
Compared with traditional fiberglass spiral chute, these 2 types are lightweight, moisture-resistant, and anti-corrosive, ensuring durability and reliable performance.
2. What is the separation range of spiral chute?
The spiral chute is widely utilized for the separation of non-ferrous metals, ferrous metals, non-metallic minerals, rare metals, and heavy minerals in tailings, effectively processing materials with a particle size range of 0.04&#;2 mm. It is particularly suitable for separating minerals such as iron, tin, tungsten, tantalum, niobium, gold, coal, monazite, rutile, zircon and other metal or mineral resources.
3.What's the principle of spiral chute beneficiation
Mineral Spiral Chute beneficiation is a gravity-based separation process characterized by inclined flow. The separation efficiency is primarily influenced by the interplay of water flow dynamics, the gravitational force acting on mineral particles, inertial centrifugal force, and frictional resistance from the chute surface.
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During operation, slurry is introduced into a chute set at a specific slope. Under the influence of water flow, the ore particles become loosened and stratified. Lighter minerals move rapidly to the upper section and are discharged swiftly from the chute, while heavier minerals settle and either accumulate within the chute or exit slowly from the lower end. By collecting these outputs separately, the process effectively yields both concentrates and tailings.
5. What's the structure parameters of spiral chute
1&#;Diameter of the Spiral Chute
The processing capacity of a spiral chute is directly proportional to the square of its diameter. To optimize throughput, a large-diameter chute is recommended for handling coarse materials whenever conditions allow.
2) Cross-Sectional Shape
The cross-sectional shape of the spiral chute should align with the particle size of the material being processed. For particles smaller than 2 mm, the ratio of the long axis to the short axis is ideally 2:1, with the long axis oriented horizontally. It is recommended that half the length of the long axis equates to one-third of the chute&#;s diameter.
3) Pitch-Diameter Ratio
The pitch of the spiral chute, defined as the ratio of its pitch to the diameter (pitch-diameter ratio), significantly impacts sorting efficiency. A ratio of approximately 0.73 has been shown to deliver optimal separation performance.
4) Length and Number of Turns
The length of the spiral chute and the number of turns determine the travel distance of materials within the chute. For easily beneficiated ores, 3&#;4 turns are typically sufficient, while more challenging ores may require 5&#;6 turns to achieve effective separation.
As energy conservation and environmental protection gain increasing attention, the adoption of gravity separation methods has become a pivotal trend in mineral processing. Gravity separation is now widely applied for ore pre-selection, recovery of free heavy minerals within grinding circuits, and as a complement to magnetic separation or flotation processes. By integrating gravity separation equipment, operators can efficiently recover coarse valuable minerals or discard final tailings, optimizing resource utilization while reducing environmental impact.
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