Phosphate gypsum powder drying equipment, ultrafine disperser, and compound modification machine

Release time:

2025-07-08 09:11

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Phosphogypsum, a major byproduct of the phosphate chemical industry, is continuously increasing in production volume. The large accumulation of phosphogypsum not only occupies valuable land resources but also may cause environmental pollution problems.

The working principle of the encapsulation modification machine is based on the synergistic effect of mechanochemical and surface modification technologies. Inside the equipment, phosphogypsum powder and modifiers undergo physicochemical reactions under specific conditions. Through high-speed rotating components, such as the high-speed friction and shearing between the rotor and stator, the phosphogypsum particles are in a fluidized state. This not only has the function of depolymerization and dispersion of the materials, but more importantly, it greatly increases the contact area and frequency between the phosphogypsum particles and the modifier. At the same time, under the action of mechanical force, the active sites on the surface of the phosphogypsum particles are activated, and the modifier can more effectively adsorb and react chemically with it, thus forming a uniform and firm coating layer on the surface of the phosphogypsum particles.

With common continuous processing equipment honeycomb mill For example, dry phosphogypsum powder and precisely metered modifiers simultaneously enter the modification cylinder. The main motor drives the high-speed rotation of the rotor, making the material fluidized and generating relatively high-speed collisions and friction with the stator installed on the modification cylinder. In this process, the generated heat promotes the rapid film formation of the modifier on the surface of the phosphogypsum particles, completing the encapsulation modification process. This unique modification chamber design meets the requirements of continuous surface modification of powder, ensuring the efficiency and stability of the modification process.

After encapsulation modification, the surface properties of the phosphogypsum particles change, and their physical properties such as dispersibility and fluidity are significantly improved. In applications such as building materials, good dispersibility allows phosphogypsum to be mixed more uniformly with other materials, thus ensuring the stability of product quality. For example, when preparing phosphogypsum-based gypsum mortar, modified phosphogypsum with good dispersibility prevents cracking and shedding during use, improving the mortar's workability and durability.

The chemical reaction between the modifier and the surface of the phosphogypsum particles can effectively reduce the leaching of harmful substances in phosphogypsum, such as phosphoric acid, fluorides, and heavy metals. At the same time, by selecting appropriate modifiers, the pH of phosphogypsum can also be adjusted to meet the requirements of different application scenarios. In road engineering, the modified phosphogypsum can be used as subgrade fill, and its stable chemical properties help improve the long-term stability of the subgrade and reduce performance degradation caused by environmental factors 。

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