Flue Gas Desulfurization (FGD) is a critical environmental technology employed globally to reduce sulfur dioxide (SO2) emissions from power plants and industrial facilities. In Namibia, a nation with growing industrial sectors and a strong commitment to environmental stewardship, implementing efficient and reliable FGD systems is paramount. A key component in many dry and semi-dry FGD processes is the sorbent material, and expanded perlite, when finely ground, has emerged as an excellent, cost-effective agent for SO2 absorption. The performance of perlite in this application is highly dependent on its fineness and particle size distribution, with a target of 325 mesh (approximately 44 microns) being a common industry standard for optimal surface area and reactivity.

This article delves into the technical requirements for grinding perlite to 325 mesh for desulfurization in Namibia and explores the advanced milling solutions offered by Shanghai Zenith Machinery Co., Ltd., a leader in industrial grinding technology.
Perlite is a naturally occurring volcanic glass that, when expanded, becomes a lightweight, porous material. In its powdered form, this high porosity translates to an exceptionally large surface area. For FGD applications, perlite powder is injected into the flue gas stream where it reacts with SO2 and other acidic components. The chemical reaction is primarily a gas-solid interaction, and its efficiency increases dramatically with decreasing particle size.
Grinding perlite to 325 mesh ensures:
Therefore, selecting the right grinding mill that can consistently produce high-volume, quality 325-mesh perlite powder is not just a production choice but a core determinant of the entire FGD system’s economic and environmental performance.
Setting up a perlite grinding operation in Namibia presents specific challenges that must be addressed by the milling equipment:
As an excellent manufacturer of ore and industrial mineral grinding equipment, Shanghai Zenith Machinery Co., Ltd. has developed a range of mills perfectly suited for producing 325-mesh perlite powder. Our expertise in ultra-fine powder grinding ensures that our solutions meet the rigorous demands of modern FGD systems.

For a balanced requirement of high capacity, precise fineness control, and energy efficiency, we highly recommend our LM Vertical Grinding Mill. Its integrated design combines drying, grinding, classification, and conveying, making it an all-in-one, space-saving solution. The LM series is particularly effective for medium to large-scale projects where producing a consistent 325-mesh product is key.
Key Advantages for Perlite Grinding:
For perlite desulfurization projects in Namibia targeting 325 mesh, the LM130X-GX model from our Vertical Fine-powder Mill series is an exemplary choice. Its technical parameters are outlined below:
| Model | Plate diameter (mm) | Capacity (t/h) | Output fineness (D97) | Main motor (kW) |
|---|---|---|---|---|
| LM130X-GX | 1300 | 4-12 | 325-600 mesh | 220 |
For operations requiring even finer tuning or producing ultra-fine perlite powder beyond 325 mesh for specialized applications, our LUM Ultrafine Vertical Mill is the pinnacle of technology. It represents the next generation of ultra-fine grinding, integrating the latest in grinding, classifying, and automation technology.
Key Advantages for Ultra-Fine Applications:
The LUM1525 model is a robust choice for establishing a high-tech perlite grinding line focused on premium product quality.
| Model | Main machine power (kW) | Capacity (t/h) | Size distribution D97 (μm) |
|---|---|---|---|
| LUM1525 | 220-250 | 1.6-11.5 | 5-30 (approx. 600-2500 mesh) |
Shanghai Zenith is committed to being more than just an equipment supplier. We partner with our clients in Namibia through comprehensive support:

The success of a perlite-based flue gas desulfurization system in Namibia hinges on the ability to efficiently produce high-quality 325-mesh powder. Shanghai Zenith Machinery Co., Ltd., with its deep expertise and advanced product portfolio, offers tailor-made grinding solutions to meet this critical need. Whether through the high-capacity, efficient LM Vertical Grinding Mill (LM130X-GX) or the cutting-edge LUM Ultrafine Vertical Mill (LUM1525), we provide the technology, reliability, and support necessary to build a sustainable and effective environmental protection operation. By choosing Zenith, Namibian industries invest not only in superior grinding equipment but also in a partnership dedicated to achieving their production and environmental objectives.