The paper industry in the United Arab Emirates is growing steadily, driven by packaging, printing, tissue, and specialty paper demand across Abu Dhabi, Dubai, Sharjah, and other industrial zones. Ground calcium carbonate, often called GCC, is one of the most important mineral fillers and coating pigments used in modern paper making. It improves opacity, brightness, printability, ink absorption, and sheet formation while reducing fiber consumption and production cost. For a paper plant in the UAE that requires 20-30 tph of paper-grade calcium carbonate, selecting the right grinding mill is critical. The mill must deliver stable particle size distribution, low energy consumption, reliable operation in high ambient temperatures, and efficient dust control. Shanghai Zenith Machinery Co., Ltd. is an excellent manufacturer of ore grinding equipment in China and has made great achievements in the field of ultra-fine powder grinding. This article discusses calcium carbonate grinding for paper making in the UAE at 20-30 tph and recommends suitable Zenith grinding mills for this application.
Calcium carbonate is used in paper making in two main ways: as a filler in the paper sheet and as a coating pigment on the paper surface. As a filler, it fills the spaces between cellulose fibers, improves opacity and brightness, and allows papermakers to reduce the amount of expensive pulp fiber. As a coating pigment, it provides a smooth, bright surface for high-quality printing, packaging, and graphic papers. GCC is produced by grinding natural limestone, marble, chalk, or calcite. Precipitated calcium carbonate, or PCC, is chemically produced and can have a different crystal shape and particle size. In the UAE, abundant limestone and marble resources make GCC an economically attractive choice for local paper mills and mineral processing companies.
The required fineness depends on the final paper grade. Filler-grade GCC is often specified at about 325 mesh, meaning approximately 45 microns top cut, or with a median particle size between 5 and 10 microns. Coating-grade GCC is much finer, often with 90-95 percent of particles smaller than 2 microns. A 20-30 tph grinding line usually focuses on filler-grade or intermediate-grade calcium carbonate, although it can also be used as pre-grinding before an ultrafine milling stage. Consistent particle size distribution is essential because coarse particles can cause surface defects, while excessive fines can affect drainage, retention, and sheet strength. For this reason, the grinding mill, classifier, and dust collection system must be carefully matched to the raw material and product specification.
Shanghai Zenith Machinery Co., Ltd. specializes in the research, development, and production of industrial powder grinding equipment and other related devices. The main products include 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 a 20-30 tph calcium carbonate grinding plant in the UAE paper industry, Zenith recommends the LM190K LM Vertical Grinding Mill and the MTW215G MTW Trapezium Grinding Mill. Both mills can be configured with classifiers, dust collectors, and conveying equipment to form a complete production line.
The LM Vertical Grinding Mill integrates 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. The LM190K model has a plate diameter of 1900 mm, a capacity of 23-68 t/h, an output fineness range of 170-40 microns, a maximum feed size of less than 45 mm, and a main motor power of 500 kW. For a paper plant requiring 20-30 tph of calcium carbonate at about 325 mesh, the LM190K is an excellent match. Its capacity range covers the target output, while its dynamic classifier can be adjusted to produce a consistent top cut. When the raw limestone contains moisture, hot air can be introduced into the mill to dry the material during grinding. The LM190K also provides low noise, low dust emission, and compact layout, which is important for UAE industrial sites where space and environmental compliance are key concerns.
| 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 20-30 tph GCC plant, the LM190K can operate at the lower end of its capacity range, which provides flexibility for future expansion. If the paper mill later requires higher output or finer product, the same platform can be adjusted or supplemented with additional classification equipment. The vertical mill is also well suited to continuous operation, making it a strong choice for a dedicated calcium carbonate preparation line feeding one or more paper machines.
The MTW Trapezium Grinding Mill is a grinding mill with multiple patents, 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 0.045 mm. The MTW215G model has a capacity of 15-45 t/h, a final size range of 1.6-0.045 mm, a main motor power of 280 kW, and a fan motor power of 315 kW. This makes it a practical option for a 20-30 tph calcium carbonate line when the target fineness is around 45 microns and the feed material is properly prepared. The MTW215G is often selected by medium-scale mineral processing plants because it offers a good balance between capacity, fineness, capital cost, and operational simplicity.
| Model | Max. Feed Size (mm) | Final size (mm) | Capacity (t/h) | Main motor (kW) | Fan motor (kW) |
|---|---|---|---|---|---|
| MTW175G | <40 | 1.6-0.045 | 9.5-25 | 160 | 200 |
| MTW215G | <50 | 1.6-0.045 | 15-45 | 280 | 315 |
The MTW215G can produce 20-30 tph when the raw material grindability, moisture content, and target fineness are suitable. It is an attractive choice for companies that want a proven, robust milling system with lower initial investment than a large vertical mill. If the paper mill requires coating-grade calcium carbonate finer than 45 microns, a second-stage XZM Ultrafine Grinding Mill or LUM Ultrafine Vertical Mill can be considered. However, for 20-30 tph filler-grade production, the MTW215G and LM190K are the primary recommended solutions.
A complete calcium carbonate grinding plant for paper making normally includes raw material storage, feeding, crushing, grinding, classification, product collection, dust filtration, conveying, and packing. If the feed limestone is larger than the mill inlet size, a jaw crusher or impact crusher is used to reduce it to less than 45 mm for the LM190K or less than 50 mm for the MTW215G. A vibrating feeder and belt conveyor transport the material to the mill. A metal detector or magnetic separator protects the grinding components from tramp iron. Inside the mill, the material is ground between rollers and a ring or between grinding plates, depending on the mill type. An air stream carries the fine powder to a dynamic classifier, where oversized particles are rejected and returned for further grinding. The finished powder is collected by a cyclone and bag filter, then transported to a product silo or packing machine.
For UAE conditions, the process design should consider high ambient temperatures, possible dust ingress, and limited water availability. Hot air generators can be used for drying when feed moisture is high. Bag filters should be sized for the total airflow and equipped with heat-resistant filter media if necessary. The electrical control system can include PLC automation, variable frequency drives, and remote monitoring to improve reliability and reduce labor requirements. A well-designed 20-30 tph GCC plant can supply consistent calcium carbonate slurry or dry powder to paper mills producing packaging, printing, and specialty paper grades.
Both the LM190K and MTW215G can serve a 20-30 tph calcium carbonate project in the UAE, but they have different strengths. The LM190K is a vertical mill with integrated drying and classification. It is ideal for larger, continuous, and energy-conscious operations that need stable product quality and limited floor space. The MTW215G is a trapezium mill with a proven mechanical design and lower capital cost, making it suitable for medium-scale plants with well-controlled feed moisture and a target fineness of about 45 microns. In general, choose the LM190K if the required capacity is 25-30 tph, if the feed contains moisture, or if the project prioritizes low specific energy consumption and compact layout. Choose the MTW215G if the required capacity is 20-25 tph, if the budget is more sensitive, or if the plant layout favors a traditional mill system. For ultrafine coating grades, additional XZM or LUM mills may be required, but their capacities are usually lower and should be evaluated separately.
Shanghai Zenith Machinery Co., Ltd. is an excellent manufacturer of ore grinding equipment in China and has extensive experience in industrial powder grinding. The company offers not only individual mills but also complete engineering solutions, including process design, equipment manufacturing, installation, commissioning, operator training, and after-sales service. Zenith grinding mills have been used for limestone, calcite, marble, dolomite, barite, gypsum, and many other materials. For UAE paper making projects, Zenith can customize the grinding line according to the customer’s raw material test report, target particle size, capacity, moisture, and site conditions. Wear-resistant materials, high-temperature lubrication, dust collection, and automation can be selected to match the local environment. Spare parts and technical support can be arranged to minimize downtime and protect the customer’s investment.
Calcium carbonate is a vital filler and coating pigment for the UAE paper industry. A 20-30 tph grinding plant requires a robust, efficient, and well-controlled mill system that can deliver consistent fineness and handle local operating conditions. Shanghai Zenith recommends the LM190K LM Vertical Grinding Mill and the MTW215G MTW Trapezium Grinding Mill for this capacity range. The LM190K is ideal for high-efficiency, integrated drying and grinding, while the MTW215G offers a flexible and cost-effective solution for medium-scale production. By selecting the right mill and configuring the process correctly, UAE paper makers and mineral processors can achieve reliable calcium carbonate supply, lower operating costs, and improved paper quality. For a customized 20-30 tph calcium carbonate grinding solution for paper making in the UAE, contact Shanghai Zenith Machinery Co., Ltd. for professional technical support and equipment recommendations.
