Lebanon has a dynamic construction and building materials market, and its ceramic sector continues to demand high-quality raw materials for tiles, sanitaryware, tableware, and technical ceramics. Granite is a hard, abrasive, and widely available material that can serve as a source of feldspar, quartz, and other ceramic ingredients when processed correctly. However, turning granite into a consistent 325-mesh powder for ceramic bodies and glazes is not a simple task. It requires robust grinding equipment, precise classification, and a process designed for hard-rock minerals. Shanghai Zenith Machinery Co., Ltd. offers proven grinding solutions for this application.
In ceramic manufacturing, particle size directly influences reactivity, sintering behavior, glaze stability, and final product strength. A 325-mesh powder corresponds to approximately 45 microns. This fineness is commonly specified for ceramic raw materials such as feldspar, quartz, and granite-derived blends. When granite is ground to 325 mesh, its surface area increases, allowing better mixing with clay and other additives. The finer powder also melts more uniformly in glazes and contributes to a smoother surface finish. For ceramic tiles, a controlled 325-mesh fraction can improve pressing density and reduce firing defects.
Yet granite is not a soft material. It typically contains quartz, feldspar, and mica, with Mohs hardness values between 6 and 7. These hard minerals cause severe wear in grinding equipment. Therefore, a granite grinding mill for ceramic materials in Lebanon must combine wear-resistant components, efficient classification, and stable output. It must also handle variations in feed moisture and hardness, which are common when granite is sourced from different quarries.
Lebanese ceramic producers face several practical challenges. First, energy costs and power reliability can affect continuous grinding operations. Equipment must be energy-efficient and capable of stable performance. Second, import and maintenance logistics require machines with long service intervals and readily available spare parts. Third, dust control is essential because fine granite powder can pose health and environmental risks. Fourth, the final product must meet strict particle size distribution targets, especially for glazes and advanced ceramic formulations.
Shanghai Zenith Machinery Co., Ltd. understands these requirements. As an excellent manufacturer of ore grinding equipment in China, the company has made great achievements in the field of ultra-fine powder grinding. Its main products include the MTW Trapezium Grinding Mill, Ball Mill, MTM Medium-Speed Grinding Mill, Raymond Mill, LM Vertical Grinding Mill, LUM Ultrafine Vertical Mill, XZM Ultrafine Grinding Mill, and Hammer Mill. For granite grinding to 325 mesh in Lebanon, two solutions stand out: the MTW Trapezium Grinding Mill and the LM Vertical Grinding Mill.
The MTW Trapezium Grinding Mill is a patented grinding mill known for its compact structure, long service life, and eco-friendly design. It is suitable for processing materials with a maximum input size of 50 mm and can produce a final product as fine as 0.038 mm. Since 325 mesh is about 0.045 mm, the MTW mill can reliably achieve this target. Its optimized grinding rollers, curved air ducts, and high-efficiency classifier make it a strong choice for granite and other hard ceramic raw materials.
For Lebanese ceramic plants with medium production requirements, the MTW138Z is an excellent option. It offers a capacity of 6 to 17 t/h and a final size range of 1.6 to 0.045 mm. The MTW175G and MTW215G are available for larger operations. All models feature low noise, low dust emission, and easy maintenance. The table below presents the main technical parameters.
| Model | Max. Feed Size (mm) | Final Size (mm) | Capacity (t/h) | Main Motor (kW) | Fan Motor (kW) |
|---|---|---|---|---|---|
| MTW110 | <30 | 1.6-0.045 | 3-9 | 55 | 55 |
| MTW110Z | <30 | 1.6-0.045 | 3-10 | 55 | 55 |
| MTW138Z | <35 | 1.6-0.045 | 6-17 | 90 | 110 |
| MTW175G | <40 | 1.6-0.045 | 9.5-25 | 160 | 200 |
| MTW215G | <50 | 1.6-0.045 | 15-45 | 280 | 315 |
When configured with a high-efficiency powder classifier, the MTW mill can deliver a consistent 325-mesh product. It is also compatible with dust collectors and automatic control systems, which helps ceramic manufacturers in Lebanon meet environmental regulations and reduce operating costs.
The LM Vertical Grinding Mill integrates five functions: crushing, grinding, powder selection, drying, and material conveying, into a single machine. It offers a small occupational area, produces a fine final powder, and is an eco-friendly production solution. For granite processing, the LM Vertical Mill can handle feed sizes up to about 50 mm and output fineness from 170 to 40 microns. Since 325 mesh is approximately 45 microns, the LM mill can be adjusted to meet the ceramic industry’s 325-mesh requirement.
One major advantage of the LM Vertical Grinding Mill is its drying capability. If the granite raw material contains moisture, hot air can be introduced into the mill to dry the material while grinding. This reduces the need for a separate dryer and simplifies the process flow. The LM mill also has a lower noise level and a compact footprint, which is beneficial for plants in Lebanon where space may be limited. For high-capacity ceramic raw material production, the LM130K, LM190K, and LM280K are recommended. Their technical parameters are shown below.
| Model | Plate Diameter (mm) | Capacity (t/h) | Output Fineness (μm) | Max. Feed Size (mm) | Main Motor (kW) |
|---|---|---|---|---|---|
| LM130K | 1300 | 10-28 | 170-40 | <38 | 200 |
| LM190K | 1900 | 23-68 | 170-40 | <45 | 500 |
| LM280K | 2800 | 50-170 | 170-45 | <50 | 1250 |
For a ceramic plant in Lebanon that requires both 325-mesh fineness and large tonnage, the LM190K or LM280K can provide the necessary capacity. If the project also needs ultra-fine powder below 325 mesh, the XZM Ultrafine Grinding Mill can be considered as a supplementary solution. However, for most granite-to-ceramic applications at 325 mesh, the MTW and LM mills offer the best balance of efficiency, wear life, and investment cost.
A complete granite grinding line for ceramic materials usually includes crushing, feeding, grinding, classification, dust collection, and storage. The process begins with primary crushing. Large granite blocks are crushed by a jaw crusher and then further reduced by a cone crusher or impact crusher to a size suitable for the mill. For the MTW mill, the feed size should be less than 30 to 50 mm depending on the model. For the LM mill, the feed size can be up to about 50 mm.
After crushing, a vibrating feeder sends material into the grinding mill at a controlled rate. Inside the mill, grinding rollers or grinding rollers and ring apply pressure to crush and grind the granite particles. An integrated classifier separates fine powder from coarse particles. Coarse particles return to the grinding zone, while the 325-mesh product enters a cyclone collector and bag filter. The finished powder is then stored in silos for use in ceramic body preparation or glaze production.
To ensure consistent 325-mesh output, the line should include online particle size monitoring or regular laboratory sieve analysis. A laser particle size analyzer can measure the D97 value. For ceramic applications, a D97 of approximately 45 microns is often specified. Adjusting the classifier speed and air flow allows operators to fine-tune the final product. Wear-resistant liners and grinding rollers are also important because granite is abrasive. Shanghai Zenith provides high-quality wear parts and technical support to keep the mill running efficiently.
Shanghai Zenith Machinery Co., Ltd. is specialized in the research, development, and production of industrial powder grinding equipment and other related devices. The company offers a complete range of mills, from coarse grinding to ultra-fine grinding. Its equipment is used in mining, building materials, chemical, and ceramic industries worldwide. For Lebanese customers, Zenith can provide customized process design, equipment selection, installation guidance, and after-sales service.
The company’s MTW Trapezium Grinding Mill and LM Vertical Grinding Mill are particularly suitable for granite grinding to 325 mesh. They combine high grinding efficiency, low energy consumption, and reliable operation. With proper configuration, a Zenith grinding line can help ceramic manufacturers in Lebanon reduce production costs, improve product quality, and meet the growing demand for fine ceramic raw materials.
Grinding granite to 325 mesh for ceramic materials in Lebanon requires a careful balance of power, wear resistance, classification accuracy, and environmental control. The MTW Trapezium Grinding Mill and LM Vertical Grinding Mill from Shanghai Zenith Machinery are two strong solutions for this application. The MTW mill is flexible and proven for medium-capacity 325-mesh production, while the LM mill offers high capacity and integrated drying for larger projects. By choosing the right model and configuring a complete grinding line, Lebanese ceramic producers can turn locally available granite into valuable 325-mesh ceramic raw material. Contact Shanghai Zenith Machinery for a tailored solution and detailed quotation.
