Limestone Mill
Product Introduction
Limestone Grinding Mill | Raymond Mill for Limestone - High Efficiency for FGD & Building Materials
Limestone is a widely distributed sedimentary rock primarily composed of calcium carbonate (CaCO₃). After grinding, limestone powder is widely used in power plant desulfurization (FGD), building materials, plastics, paints, rubber, feed, glass, cement, and many other industries. With increasingly stringent environmental requirements, the demand for limestone powder for wet FGD in power plants continues to grow. At the same, the construction, plastics, and coatings industries also have strong demand for high-quality limestone powder.
Raymond mill is the ideal equipment for processing limestone powder. It is suitable for non-flammable and non-explosive materials with Mohs hardness ≤7 and moisture ≤6%, particularly well-suited for medium-hardness materials like limestone. Using the centrifugal rolling + air classification principle, it can grind limestone from a feed size of ≤30mm down to 80-400 mesh (up to 600 mesh for some applications), producing uniform fineness, concentrated particle size distribution, and no over-grinding.
Compared with traditional ball mills, the Raymond mill offers significant advantages: compact structure, small footprint, low power consumption, high one-pass powder yield, uniform product fineness, and dust-free operation. Our Raymond mill features high-manganese alloy rollers/rings, wear-resistant shovels, high-efficiency fans, and pulse baghouse filters to ensure long-term stable operation while meeting strict environmental standards at home and abroad.
Limestone powder is widely used in the following industries:
| Application Industry | Typical Fineness | Value Proposition |
|---|---|---|
| Power Plant FGD | 250-325 mesh (44-61μm) | As absorbent, reacts with SO₂ to produce gypsum, desulfurization efficiency ≥95% |
| Building Materials | 100-200 mesh | Used in cement, lime mortar, putty, dry-mix mortar, improves workability and strength |
| Plastics Industry | 400-800 mesh | As functional filler, improves rigidity and heat resistance, reduces production costs |
| Paints & Coatings | 600-1250 mesh | Enhances opacity, improves leveling, partially replaces titanium dioxide |
| Rubber Industry | 200-400 mesh | Improves abrasion resistance and processing performance of rubber products |
| Feed Industry | 80-200 mesh | As calcium supplement, promotes animal bone development |
| Glass Industry | 100-200 mesh | Provides CaO component, regulates glass melting properties |
| Dry/Semi-Dry FGD | 200-325 mesh | Used in CFB boilers for desulfurization, removes SO₂ and SO₃ |
Product Features
High Efficiency & Energy Saving
Raymond mill saves 30%-40% energy compared to ball mills—only 20-30 kWh per ton for limestone, greatly reducing operating costs
Uniform & Adjustable Fineness
Product fineness adjustable from 80-400 mesh (up to 600 mesh for some), narrow particle size distribution, especially suitable for FGD requirement of 250-325 mesh
High One-Pass Yield & Optional Automatic Control
Closed-circuit system automatically returns coarse powder for regrinding, resulting in high yield and large capacity. Optional PLC automatic control system for one-touch start/stop and fault alarms, suitable for modern factories
Compact Structure, Small Footprint
Vertical layout occupies only 1/3-1/2 of a ball mill's floor space, lowering civil construction costs
Environmentally Friendly, Dust-Free
Negative pressure sealed operation throughout, equipped with pulse baghouse filter, dust emission <20mg/Nm³, meeting power plant and industrial environmental standards
Wear-Resistant & Durable
Grinding rollers and rings made of high-manganese alloy, service life up to 8,000-12,000 hours, suitable for long-term continuous grinding of limestone
Stable Operation, Easy Maintenance
Transmission system uses reducer + belt pulley, simple structure, easy replacement of wear parts
Strong Adaptability & Turnkey Solution
Can process limestone, calcite, marble, chalk, and other carbonate materials with Mohs hardness ≤7 and moisture ≤6%. Complete process solution from crushing, grinding, classification, collection to packaging
Working Principle
The working principle of the Limestone Raymond Mill is based on centrifugal rolling and air classification. The whole process consists of the following steps:
1. Feeding
Limestone raw material is crushed by a jaw crusher to ≤30mm, then lifted by a bucket elevator into a raw material silo, and uniformly fed into the Raymond mill grinding chamber by an electromagnetic vibrating feeder.
2. Grinding
When the main unit is working, the grinding rollers tightly press against the grinding ring under centrifugal force. The material is scooped up by a shovel blade and thrown between the rollers and the ring, where it is crushed and ground. Limestone is pulverized into fine powder between the rollers and the ring.
3. Classification
The ground powder rises with the airflow from the fan to the classifier. The classifier controls the final fineness by adjusting the speed of the classifying rotor. Powder that meets the fineness requirement passes through the classifier to the cyclone collector or dust collector; coarse powder is rejected and falls back into the grinding chamber for regrinding, forming a closed circuit.
4. Collection & Dust Removal
After preliminary collection by the cyclone collector, the dust-laden gas enters a pulse baghouse filter for further purification, achieving final dust emission below 20mg/Nm³. The collected finished powder is discharged through a discharge valve and conveyed by a screw conveyor to the finished product silo or packaging machine.
5. System Features
The entire system operates under negative pressure, preventing dust leakage.
An air volume control valve between the fan and the main unit allows adjustment based on limestone characteristics and fineness requirements.
Grinding rollers and rings are made of high-wear-resistant alloy materials for long service life, suitable for limestone‘s medium abrasiveness.
Technical Parameter
| Model | KL500 | KL650 | KL780 | KL980 | KL1100 | KL1450 | KL1760 | KL1950 | KL2100 |
| Handling Ability (t/h) | 0.5-2 | 0.5-2.5 | 1-3 | 1.5-4 | 2-6 | 6-10 | 8-20 | 15-30 | 20-40 |
| Main Motor Power(kw) | 7.5 | 15 | 18.5 | 30 | 45 | 90 | 132 | 185 | 220 |
| Fan power(kw) | 5.5 | 11 | 15 | 22 | 37 | 90 | 132 | 185 | 220 |
| Analyst power(kw) | 1.1 | 1.1 | 2.2 | 2.2 | 5.5 | 7.5 | 22 | 37 | 45 |
| Rotate Speed(r/m) | 120 | 120 | 120 | 120 | 120 | 90 | 90 | 90 | 90 |
| Diameter of Grinding Ring(mm) | 500 | 650 | 780 | 980 | 1100 | 1450 | 1760 | 1950 | 2100 |
| Diameter of Grinding Roll(mm) | 150 | 180 | 260 | 300 | 320 | 400 | 450 | 570 | 630 |
| Maximum Feed(mm) | 15 | 15 | 15 | 20 | 25 | 30 | 30 | 40 | 40 |
| Finished Particle Size(mm/mesh) |
1.6 ------ 0.045mm （16-325 Mesh） |
1.6------0.023mm （16-600mesh） |
|||||||
| Weight(t) | 1.8 | 2.8 | 3.8 | 6.5 | 14.5 | 26 | 48 | 65 | 85 |
Why Choos Us
Optimized for Limestone Processing: Grinding pressure and airflow optimized for limestone‘s hardness, abrasiveness, and FGD fineness requirements, ensuring product reaches 250-325 mesh (power plant desulfurization standard).
Stable Fineness, High Activity: Limestone powder has concentrated particle size distribution and high specific surface area, resulting in high desulfurization reactivity and guaranteed efficiency.
Significantly Lower Operating Costs: Low power consumption (20-30 kWh/ton), long life of wear parts, high automation, and low labor costs.
Environmental Compliance, Green Production: Fully enclosed negative pressure system + high-efficiency dust collection—no dust leakage, meets power plant and industrial environmental standards.
Global Service Experience: Our KLV Raymond mills have been exported to over 50 countries and regions in the Middle East, Southeast Asia, Africa, and South America, providing overseas installation, commissioning, and operation training.
EPC Turnkey Service: From raw material analysis to finished product packaging, we provide one-stop solutions for customer convenience.
Contact us today for professional selection advice and a customized solution.
Request a Quote → Tell us your capacity requirement, target fineness, and raw material condition, and we will respond within 24 hours
Company Profile
Kolev Equipment Technology Co., Ltd. is a large-scale private technology enterprise. The company is committed to the research and development, production and sales of technical equipment for the mining and metal ore industries. It has been deeply involved in the ultra-fine grinding, industrial drying and crushing sand making industries for many years. We can provide you with Provide intelligent solutions and mature supporting products, focusing on the development of various powder equipment, complete powder production lines, drying production lines, sand and gravel line equipment and projects.Products are sold to 160 countries and regions and are well received by customers.
Kolev Equipment has always been adhering to the business philosophy of surviving by quality and developing by credibility, striving to win the trust of customers with high-quality products and perfect after-sales service, and create a brilliant future for Kolev.
