Moving Sieve Separation Technology
GRAVICON is the developer and manufacturer of jigging machines with a moving sieve, designed for high-efficiency beneficiation of coal and ferrous and non-ferrous metal ores.
This technology represents an advanced evolution of classical jigging systems and has been successfully applied in industrial operations for several decades.
The moving sieve concept was originally developed in the late 1990s in close cooperation with leading beneficiation specialists and industrial partners. Industrial application demonstrated significantly superior separation performance, with separation efficiency up to 30% higher compared to conventional jigging machines.
The technology proved so effective that it continued to be expanded and modernized in long-term industrial use.
Moving sieve jigging technology has since been successfully applied not only to manganese ores, but also to coal, ferroalloy slags, and other mineral and technogenic materials.
Key Technological Advantages
The superior performance of moving sieve separation is achieved through a fundamentally different hydrodynamic principle.
Water movement becomes more laminar and uniformly distributed across the entire separation area, unlike classical under-screen pulsation systems.
This results in:
- 2.5–4× lower electricity consumption;
- 3–4× reduction in under-screen water consumption;
- zero compressed air usage;
- 3–4× smaller circulating water reservoirs;
- installation on any prepared hard surface without foundations;
- on-site installation time of up to 2 weeks;
- improved discharge and dewatering of heavy fractions through intelligent control systems;
- modern PLC-based automation with operator panels and full plant-level integration.
Next-Generation Moving Sieve Systems
In 2020, GRAVICON introduced a new generation of moving sieve technology with electronic drive and dynamic sieve motion.
Optimized kinematics allowed doubling throughput per 1 m² of active sieve area, while simultaneously improving separation quality.
Key performance parameters include:
- air consumption: 0 m³/h;
- energy consumption: < 0.8 kWh per ton of feed, calculated for the entire beneficiation complex (including water pumps, slurry pumps, conveyors, and dewatering screens).
Such low energy demand significantly simplifies power supply, especially in remote locations. A 50 kW diesel generator is sufficient to power a 50 t/h beneficiation complex (excluding crushing).
Water Efficiency, Modularity & Permitting
Factory-assembled modular delivery with pre-installed cabling and control systems reduces on-site installation time from 1–3 months to just 5–7 days.
No load-bearing foundations are required — any level prepared surface is sufficient.
Circulating water volumes are reduced:
- 5–7× compared to conventional stationary plants;
- 1.5–2× compared to earlier moving sieve designs.
For example, a 50 t/h complex requires only three circulating water tanks of 250 m³ each, whereas classical stationary plants typically require 5,000–10,000 m³.
This reduction often eliminates or significantly simplifies construction and permitting requirements.
Full modularity allows capacity expansion by parallel addition of beneficiation cells without stopping production or losing previous investments, making the technology especially effective during phased project development.
Material Size Range & Integration
The technology processes material up to 50 mm, covering approximately 95% of hydraulic jigging applications, including most coals, manganese and iron ores, technogenic slag dumps, diamonds, and similar materials.
The remaining 5% of cases (50–150 mm) are addressed using GRAVICON air-pulsated, elevator-free jigging solutions.Moving sieve jigging systems are fully compatible with GRAVICON modular beneficiation complexes, delivering high separation quality with substantially reduced energy and operating costs.