Small Diaphragm Jig

Updated: 2026-09-16

Overview

The Small Diaphragm Jig is a specialized gravity separation device widely used in mineral processing. It employs a diaphragm-driven pulsating water flow to stratify particles based on density, allowing efficient separation of heavy minerals like gold or tungsten from lighter gangue materials. Its compact design makes it particularly suitable for small-scale mining operations, laboratory testing, or remote locations where larger equipment is impractical. The device's simplicity and reliability have made it a staple in mineral recovery processes worldwide.

Structure and Working Principle

The jig consists of a water-filled tank divided by a diaphragm, with a screen bed where mineral separation occurs. An electric motor drives the diaphragm to create pulsations, causing periodic water movement through the bed of material. As the pulsations occur, heavier particles settle through the lighter material, creating distinct layers. The separated minerals are then discharged through different outlets. The stroke length and pulsation frequency can typically be adjusted to optimize separation for different materials.

Key Features

Modern Small Diaphragm Jigs offer several advantages including adjustable stroke length (typically 0-25mm) and variable speed control (usually 100-400 strokes per minute). Their modular design allows for easy maintenance and replacement of wear parts like the diaphragm or screen. Energy efficiency is another notable feature, with most models consuming between 0.75-3 kW. Many units incorporate transparent sections for process observation, and some advanced models include automated control systems for consistent operation.

Application Areas

Primary applications include gold placer mining, tin ore processing, tungsten recovery, and diamond concentration. The jig is particularly effective for materials with particle sizes between 0.5-10mm, though some models can handle finer or coarser material. Beyond mining, these jigs find use in scrap metal recycling, electronic waste processing, and even archaeological site investigations where density separation is required. Their versatility makes them valuable across multiple industries dealing with material separation.

Maintenance and Precautions

Regular maintenance should include diaphragm inspection (typically every 500 operating hours), screen condition checks, and lubrication of moving parts. The diaphragm is the most critical wear component and should be replaced at first signs of cracking or wear. Operators should avoid overloading the jig beyond its rated capacity, as this reduces separation efficiency and accelerates wear. Water quality should be monitored, as excessive solids can clog the system. Proper grounding is essential when processing conductive materials.

B2B Procurement Guide

When sourcing Small Diaphragm Jigs, consider the material being processed (particle size distribution and density difference), required throughput (typically 0.5-5 tons per hour for small units), and available power supply. Reputable manufacturers often provide test processing of customer samples. Lead times generally range from 4-12 weeks for standard models. For international shipments, verify container dimensions and weight (typically 200-800kg). After-sales support availability and spare parts inventory should be key selection criteria, especially for operations in remote locations.