The three-product heavy medium hydrocyclone is a commonly used device in the coal preparation industry. It can separate clean coal, middling coal, and gangue into three products simultaneously, offering advantages such as simple process and high separation accuracy. The following is a detailed introduction to its product highlights, common problems, application cases, and technical advantages:

Product Highlights

Single-Product Separation: Using a single low-density heavy medium, it can separate clean coal, middling coal, and gangue into a single product. This simplifies the preparation, control, conveying, and separation systems for the high-density suspension, saving capital investment and operating costs.

High Separation Accuracy: Standard or non-standard models can be customized based on coal quality, process, and performance parameters, achieving high separation efficiency. Typically, Ep1 ≤ 0.03 kg/l, Ep2 ≤ 0.05 kg/l, and separation efficiency n ≥ 98%.

Wide Feed Particle Size: The upper feed size can reach 100 mm and the lower feed size can reach 0.3 mm. It is highly adaptable to coals of varying particle sizes and can be used with materials with varying gangue content. Flexible Layout: Various layouts, including parallel, vertical, and straight, can be adopted based on site space availability.

Common Problems

Low recovery rate and high calorific value of gangue: This may be caused by an oversized underflow nozzle, improper specific gravity setting, or inaccurate hydrometer readings.

Unstable or stagnant pressure: This may be due to low liquid levels in the mixing and mixing tanks, coal lumps at the inlet of the mixing tank's horizontal flow pipe, or a loose air duct valve.

Damaged gaskets connecting the Hydrocyclone body, causing leakage: After long-term operation, the gaskets may wear and deteriorate, requiring shutdown and replacement.

Excessive light material in the underflow: Low feed pressure or severe wear of the underflow nozzle can lead to a high concentration of light material in the underflow.

Abnormal noise in the hydrocyclone: This may be caused by foreign matter such as iron lumps or wear-resistant bricks mixed with the raw coal, which enters the hydrocyclone and causes abnormal noise.

Technical Advantages

The process system is simple and reliable: The raw coal is fed centrally by gravity, and the medium is pumped in tangentially. A single, low-density, heavy medium is used to separate and separate three products simultaneously. Compared to traditional processes, this reduces equipment and piping, resulting in a simpler and more reliable system.

Minimal Over-Crushing: Minimum over-crushing of the material results in less secondary coal slime, which improves clean coal quality and subsequent processing. Furthermore, the pump and piping system experience minimal wear, reducing equipment maintenance costs.

Adjustable Sorting Density: While maintaining the quality of clean coal and middling coal, the first and second stage sorting densities can be adjusted online and continuously. This allows for flexible adjustment of sorting parameters to suit different coal qualities and production requirements, ensuring optimal sorting results.

Long Service Life: The medium is fed in an involute manner and is manufactured using high-performance, wear-resistant materials, such as a high-Alumina ceramic lining, for excellent wear resistance, extending the equipment's service life.

Three-product heavy medium hydrocyclone Key attributes