What is the Best Granite Grinding Equipment for Your Project?

Granite rock to granite powder

I. Overview of Granite Grinding Equipment

Granite, a high-hardness material with a Mohs hardness of 6-7, requires extremely high equipment performance in terms of wear resistance, grinding efficiency, and fineness control during grinding. Granite grinding equipment is mainly pided into two categories to meet different processing needs: powder processing equipment and surface polishing equipment, suitable for mining crushing and powder production and stone surface treatment, respectively.

II. Recommended Granite Powder Processing Equipment

1. Raymond Mill: A Cost-Effective Choice for SMEs

The Raymond mill is a mature technology proven over a century and remains a mainstream piece of equipment in the industry. Its working principle is to crush materials through the centrifugal rolling of grinding rollers on a rotating grinding ring, offering the following significant advantages:

Granite Raymond Grinding Equipment

Technical Features:

• Integrated 3D Design: Crushing + Grinding + Classification integrated, saving 40% of plant space compared to traditional ball mill systems.

• Outstanding Economic Efficiency: Hourly capacity of 3-12 tons (new models can reach 55 tons), meeting the fineness requirements of 80-400 mesh.

• Strong Adaptability: Capable of handling materials with a Mohs hardness ≤7 and a moisture content ≤8%.

• High Screening Rate: Screening rate up to 99%, an advantage difficult to achieve with other grinding equipment.

Core Parameters:

• Feed Particle Size: ≤30mm

• Finished Product Particle Size: 0.125-0.044mm (80-400 mesh)

• Energy Consumption: 32-38 kWh/ton

• Investment Cost: 500,000-2,000,000 RMB

2. Vertical Grinding Mill: A Cost-Reducing Tool for Large-Scale Production

The vertical grinding mill adopts advanced material layer crushing technology, making it particularly suitable for large-scale granite powder processing projects. It boasts the following technical advantages:

Vertical Grinding Mill

Technical Advantages:

• High-Precision Classification: Equipped with a dynamic and static combined classifier, achieving a fineness of 3-45μm (with a secondary classification system), meeting the production requirements of 300-3000 mesh ultrafine powder.

• Large-Scale Production: Single-machine capacity up to 40t/h, with overall energy consumption reduced by 20% compared to traditional equipment.

• Wide Raw Material Adaptability: Can directly process raw materials with a moisture content of 15%, eliminating the need for drying.

• Environmentally Friendly and Low-Noise: Fully enclosed negative pressure operation, dust emissions are lower than industry standards, and noise control is excellent.

Core Parameter Comparison:

3. High-Pressure Roller Mill: The Preferred Solution for Hard Rock Sand Making

The high-pressure roller mill adopts the "layered crushing" principle, which is particularly suitable for the pre-crushing stage of granite sand making. Through the counter-rotating high-strength steel rollers, the material is repeatedly squeezed under hundreds of tons of hydraulic pressure, resulting in concentrated output particle size. The proportion of fine materials ≤3mm and ≤5mm is significantly increased, and the service life of a single roller surface can reach over 18,000 hours.

YGM Grinding Mill

III. Recommended Granite Surface Polishing Equipment

1. Granite Refurbishing Machine: Professional Floor Treatment Equipment

The granite refurbishing machine is a multi-functional stone processing machine capable of quickly completing various processes such as cleaning, leveling, grinding, and polishing of stone floors, subfloors, and slabs. It features the following characteristics:

Mechanical Features:

• Classic Fixed Speed: Equipped with two speed settings (high and low, non-frequency), the coarse and fine grinding discs have high torque and stable grinding force.

• Sufficient Grinding Disc Pressure: The machine weighs up to 250kg, and the corresponding pressure on the grinding disc exceeds 180kg, suitable for high-hardness granite.

• Front-mounted Electric Lifting Device: The grinding disc replacement is highly user-friendly, meeting the pressure requirements of different construction processes.

• High Safety: The equipment's start-up, stop, and front-end lifting system use a 24V low-voltage power supply, equipped with overload and leakage protection devices.

Technical Parameters:

• Power: 2.2-7.5kW

• Grinding Disc Diameter: 300-500mm

• Working speed: 15-20㎡/hour

• Applicable materials: Granite, marble, epoxy flooring, cement flooring, etc.

2. Water Grinding Machine (Water-filled Polishing Machine)

Water grinding machines are suitable for polishing marble, granite, terrazzo, concrete, and other materials. A typical model is the LM30-VE, with a power of 2.2kW, a 300mm diameter abrasive holder, variable speed adjustment, a 26-liter water tank, a net weight of 100kg, and easy and flexible operation.

3. Fully Automatic Continuous Grinding and Polishing Machine

Fully automatic continuous grinding and polishing machines use a PLC intelligent control system and are equipped with a laser scanning device to automatically detect the contour of the slab. They also feature automatic head avoidance. Working efficiency is 170-200m²/8 hours, abrasive consumption is 1.2-1.5 yuan/m², and power consumption is approximately 60kW. Suitable for surface polishing of granite/marble slabs.

IV. Matching Abrasives: Diamond Wet Abrasive Pads

Diamond wet abrasive pads are a key tool for grinding and polishing granite. They are made of a composite material of resin binder and diamond micropowder, featuring strong grinding power, good durability, and fast polishing speed.

Specifications:

• Sizes: 3 inch (80mm), 4 inch (100mm), 5 inch (125mm), 6 inch (150mm), 8 inch (200mm)

• Grit Range: 30# to 3000#

• Thickness: 3.0mm or 3.5mm

• Maximum Linear Speed: 8000rpm

Application Advantages:

• Strong grinding power, good durability, moderate softness

• Fast polishing speed, stone surface gloss can reach over 90°

• Not easily stained, surface is scratch-free after processing

• Suitable for various materials such as granite, marble, concrete, and ceramic tiles

V. Scientific Selection Guide

1. Determine Machine Type Based on Scale

• Annual output < 50,000 tons or investment budget < 1 million: Raymond mill is preferred, with a short investment payback period and low operating costs.

• Annual output ≥ 100,000 tons: Vertical mill is recommended, its energy-saving benefits can offset the equipment price difference in 2-3 years.

2. Fineness Depends on Application

• For building mortar powder below 325 mesh: Raymond mills offer better cost-effectiveness and fully meet technical requirements.

• For plastic and coating powders above 800 mesh: Vertical mills with a dynamic grading system are essential to ensure stable finished particle size.

3. Environmental Priority Principle

The new Environmental Protection Law of 2025 requires dust emissions to be ≤15mg/m³. The fully enclosed structure of the vertical mill, combined with pulse dust collection, achieves measured emissions of only 8mg/m³, 40% lower than the Raymond mill system. When selecting equipment, environmental compliance must be considered to avoid additional costs from future modifications.

VI. Successful Case Sharing

Case 1: 120-ton/hour Granite Production Line in Golmud, Qinghai

Configuration Details:

• Core Equipment: Type 69 Jaw Crusher (Coarse Crushing) + Type 1200 Spring Cone Crusher (Medium Crushing) + VSI 9522 Impact Sand Making Machine (Sand Making and Shaping)

• Supporting Equipment: Pulse Dust Collector and Air Classifier, High-Precision Feeder, Multi-stage Vibrating Screen

• Capacity: 120 tons/hour, closed-loop operation, stable and efficient

• Finished Product Quality: Rounded particle shape, reasonable gradation, meeting the requirements for high-quality sand

Case 2: Mobile Crushing Production Line in Jiaozuo, Henan

Project Features:

• Raw Material: Granite, particle size ≤ 660mm

• Configuration: Mobile Jaw Crusher + Mobile Cone Crusher

• Capacity: 150 tons/hour, 10 hours of operation per day

• Advantages: Flexible mobility, easy operation, and environmental compliance.

VII. Frequently Asked Questions (FAQ)

Q1: What is the investment payback period for granite grinding equipment?

A: Depending on the project scale and configuration, the investment payback period is typically 3-12 months. A small production line (50-100 tons per hour) requires an investment of approximately 300,000-1,000,000 RMB, with an annual net profit of 500,000-1,500,000 RMB; a large production line (200-500 tons per hour) requires an investment of 2,000,000-8,000,000 RMB, with an annual net profit of 2,000,000-8,000,000 RMB. Specific calculations need to consider local sand and gravel prices, raw material costs, operating expenses, and other factors.

Q2: What environmental protection features are required for a granite sand making production line?

A: Granite sand making production lines must be equipped with the following environmental protection facilities:

• Dust removal system: Pulse jet bag filter, dust emission concentration controlled below 10mg/m³

• Wastewater treatment: Wet process production lines must be equipped with sedimentation tanks and water circulation systems

• Noise control: Equipment equipped with vibration damping and sound insulation devices to reduce operating noise

• Enclosed workshop: Fully enclosed production workshop to prevent dust diffusion

Q3: What is the service life of diamond water grinding pads?

A: The service life of diamond water grinding pads depends on the hardness of the stone, grinding pressure, and operating process. Under normal circumstances:

• Coarse grinding stage (30#-100#): Each piece can grind 15-25 square meters.

• Medium grinding stage (200#-800#): Each piece can grind 20-30 square meters.

• Fine grinding stage (1500#-3000#): Each piece can grind 25-40 square meters.

• Polishing stage: Each piece can grind 30-50 square meters.

It is recommended to use the pieces in the order of coarse grinding → medium grinding → fine grinding → polishing, and to use water cooling to effectively extend their service life.

VIII. Equipment Maintenance Recommendations

To ensure the long-term stable operation of the granite grinding equipment and extend its service life, please note the following:

1. Regularly inspect wear parts: Granite has high hardness, causing significant wear on easily worn parts such as grinding rollers and grinding discs. A regular inspection and replacement system should be established.

2. Maintain uniform feeding: Avoid overfeeding or underfeeding to ensure a stable material layer inside the mill and improve grinding efficiency.

3. Regularly maintain the grading system: The classifier is a key component controlling the fineness of the finished product and requires regular cleaning and maintenance to ensure grading accuracy.

4. Establish an energy consumption monitoring system: Monitor equipment energy consumption in real time, promptly detect abnormalities, and optimize operating parameters.

About of Baichy Heavy Industry

Baichy Heavy Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015 、certified, and our products include mobile crushing palnts, crawler crushing plant, construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers, grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.

Our advantages:

• Professional pre-sales support: Free project design and comprehensive solutions to help you accurately select the right equipment;

• Comprehensive on-site service: Providing installation guidance and worker training to ensure smooth equipment commissioning;

• Reliable after-sales guarantee: A complete after-sales system, timely response to technical inquiries and equipment maintenance, ensuring long-term stable operation.

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