Choose Roller Sand Making Machine For Pebble Sand Making
Pebble sand making can completely choose the roller sand making machine, and its technical suitability and economy are outstanding in specific scenarios. The following is a detailed analysis of the comprehensive industry practice and equipment characteristics:
1. The core advantages of roller sand making machine in processing pebbles
Precise and controllable particle size
By adjusting the roll gap (0.5-5mm) through the hydraulic system, the discharged particle size can be stably controlled within the range of 1-5mm, which meets the Class I standard (fineness modulus 2.6-3.0) for construction sand.
Extrusion crushing principle reduces over-crushing, stone powder content ≤10%, finished sand grain type is mainly cubic, improving concrete strength.
Wear resistance and low maintenance cost
Roller skins are made of high chromium manganese steel or tungsten carbide alloy, with a life span of 6-12 months (only 3-6 months for ordinary equipment), and the replacement frequency is reduced by 50%.
No wearing parts design (only the roller skin needs to be replaced regularly), the maintenance cost is 30% lower than the impact sand making machine.
Energy saving and economy
The energy consumption is 30%-40% lower than that of the impact breaker, and the annual electricity cost of the production line with an hourly output of 100 tonnes is more than RMB 150,000 yuan.
Low investment cost (e.g., the price of 1010 rollers of Huashengming is about 70% of that of impact breakers with the same capacity).
2. Matching of applicable models and production capacity
According to the hardness of pebbles and production scale, the following models are recommended:
| Production scale | Recommended Models | Feed size | Output size | Production(t/h) | Applicable Scenarios |
|---|---|---|---|---|---|
| Miniature Production Line | 2PGT750×500 | ≤30mm | 1–5mm | 20–50 | ≤ 50 tonnes per hour, site-constrained projects |
| Medium Production Line | 2PGY1000×1000 | ≤50mm | 0–5mm | 60–120 | 100-150 tonnes per hour, conventional gravel plant |
| Large Production Line | 2PGY1800×1000 | ≤120mm | 2–10mm | 200–300 | Over 300 tonnes per hour, aggregate base |
Note: Large models need to be matched with jaw/cone breakers to pre-treat large pebbles (>80mm).
3. Restrictions and Precautions
Raw material pretreatment requirements
The feed size should be ≤ the permissible value of the equipment (e.g. Model 1010 is limited to 50mm), over the limit of coarse crushing (recommended jaw + cone crusher combination).
Pebbles with mud content >5% should be pre-washed to avoid clogging of sticky rollers.
Key maintenance measures
Iron remover must be installed: to prevent metal foreign objects from damaging the roll surface (e.g. brazier heads can lead to downtime accidents).
Regular calibration of the roll gap: wear gap deviation > 1mm will lead to too fine material, need to be adjusted weekly testing.
Bearing temperature control: the operating temperature should be ≤ 65 ℃, over temperature need to stop to check the lubrication system.
Prudent use of the scene
Super-large size pebbles (>200mm): direct feeding will accelerate the wear of roller surface.
4. Production line configuration recommendations
Scenario 1: Economic small and medium-sized line (50-100 tonnes per hour)
Flow: Jaw Crusher (PE750×1060) → Cone Crusher (HPT200) → Roller Sand Making Machine (1010 type) → Sand Washing Machine.
Characteristics: investment of about 800,000 yuan, low energy consumption, simple maintenance, finished sand with controllable powder content.
Option 2: High-quality large-scale line (over 200 tonnes per hour)
Flow: rotary breaker → cone breaker → hydraulic roller sand making machine (2PGY1800×1000) → high frequency screen + fine sand recycling machine.
Characteristics: The finished product has excellent granularity (the proportion of cubic ≥ 85%), suitable for high grade concrete, but the investment is over 1.5 million.
Choose Huashengming 1010 hydraulic roller machine (60-120 tonnes per hour), suitable for most cobblestone sand plants, supporting real-time adjustment of particle size. Matching iron remover + automatic lubrication system to extend the life of the roll skin to more than 10 months. Before purchasing, you need to verify the roller skin material (high chrome manganese steel is preferred) and the stability of the hydraulic system.
