Introduction to the XJM Flotation Machine

Before the 1970s, most flotation machines used in my country’s coal preparation plants were imported or copied from abroad. These machines generally suffered from drawbacks such as small aeration capacity and low processing capacity, failing to meet the needs of production development and hindering my country’s economic growth. To adapt to the rapid development of the coal preparation industry, my country independently developed a new type of coal slime flotation machine—the XJM flotation machine—which greatly improved production efficiency and directly accelerated the development of the coal preparation industry.

Structure of the New XJM Flotation Machine

The XJM flotation machine has six flotation chambers. Each chamber consists of a motor, an aeration and agitator, a froth scraping mechanism, a housing, a slurry level adjustment mechanism, a discharge mechanism, and tailings.

The aeration and agitator mechanism is the core of a mechanically agitated flotation machine. It consists of rotating and stationary parts, fixed to two angle steel members in the flotation cell with four bolts. Its structure determines the aeration, suction, mixing, gas dispersion, and mineralization of the slurry, significantly impacting the flotation machine’s performance and serving as a key differentiator between various types of flotation machines.

Features of the XJM type flotation machine’s umbrella-shaped impeller and stator assembly:

1. The three-layer impeller and stator, forming the suction chamber, air chamber, and circulation chamber, can simultaneously complete the three tasks of intake of coal slurry, intake of air, and circulation of coal slurry.

2. It adopts a dual-system air intake, providing a large air volume with flexible adjustment.

3. The upper and lower cone angles of the umbrella-shaped impeller are different, allowing fresh coal slurry, circulating coal slurry, and air ejected by the impeller to meet at different angles, which is beneficial for the mineralization of bubbles.

4. The umbrella-shaped impeller throws the aerated coal slurry obliquely downwards along the two cone surfaces of the impeller. The slurry is thrown to the bottom of the tank and then deflects, forming a “W”-shaped motion. This motion mode allows some of the energy of the coal slurry ejected from the impeller to be lost during the collision with the bottom of the tank, thus avoiding the churning phenomenon in mineral processing, maintaining a relatively stable slurry level, and promoting further abrasion of bubbles at the bottom of the tank, while also preventing coal particles from settling at the bottom.