What equipment should be selected for stone crushing and sand making? The choice of equipment for stone crushing and sand making needs to be matched according to the characteristics of the material, the capacity demand and the requirements of the finished product. Roller sand making machine in the field of stone crushing and sand making by virtue of its unique working principle and structural design, showing significant comprehensive advantages, especially suitable for the sand making needs of materials below medium hardness (such as limestone, river pebbles, greenstone, etc.). The following is the analysis of its core advantages and applicable scenarios:

Stone sand making site

1. Core advantages of roller sand making machine

Excellent granularity and reasonable grading of finished products

Cubic grain shape: through the double-roll extrusion crushing (non-impact), the material breaks along the natural texture, and the finished sand is cubic, with low needles and flakes content, which improves the compressive strength of concrete.

Precise and controllable particle size: Hydraulically or mechanically adjustable roll gap (0.5-50mm), uniform discharge particle size (1-10mm), and stable fineness modulus of 2.6-3.0 (construction sand class I standard).

Low over-crushing rate: Extrusion crushing reduces the generation of stone powder (powder content ≤10%), continuous grading, directly used for concrete, masonry mortar, without the need for secondary screening.

Energy saving and environmental protection, low operating costs

Energy consumption reduced by 30%-40%: low-speed extrusion crushing is more energy-saving than impact sand making machine, 100 tonnes per hour production line saves more than 150,000 yuan in annual electricity costs.

Dust and noise control: closed structure + pulse bag dust removal, dust emission ≤ 20mg/m³; operating noise ≤ 80dB, in line with green mine standards.

Dry operation saves water resources: no water cooling, suitable for arid areas.

Wear-resistant and durable, easy maintenance

High life-span roller skin: adopts high chromium manganese steel or tungsten carbide alloy, with a life-span of 6-12 months (the wearing parts of impact sand making machine need to be replaced in 3-6 months).

Modular design: only the roller skin needs to be replaced periodically, supporting quick disassembly, reducing downtime by 50% and maintenance cost by 30%.

Strong adaptability, flexible production adjustment

Multi-hardness material compatibility: can handle materials with Mohs hardness ≤ 7 (such as limestone, river pebbles, coal gangue), by adjusting the roller pressure parameters to deal with medium and high hardness stone.

No blockage of wet and sticky materials: special roll surface design prevents sticking materials and supports materials with 8% moisture.

2. Advantages of roll sand making machine compared with other sand making equipment

3. Roller sand making machine model recommendation:

Small line (≤50t/h): 2PG750×500 (discharge 1-5mm, power 22kW).

Medium-sized line (100-150t/h): Huashengming 1000*1000 (hydraulic adjustment, output 60-120 tonnes per hour).

Large-sized line (≥200t/h): 2PGY1800×1000 (roll seam intelligent adjustment, hourly output 200-300t).

4. Precautions for use

Pre-treatment requirements:

Feed particle size ≤ equipment allowable value (such as 1010 type limit 50mm), exceeding the limit needs to be coarse crushing.

Pre-washing is required when the mud content is >5% to prevent the sticky rollers from clogging.

Key maintenance measures:

Must install the iron remover: to prevent metal foreign body damage to the roll surface.

Weekly calibration of roll seam: wear deviation >1mm will lead to too fine material.

Bearing temperature control ≤ 65 ℃: over temperature need to check the lubrication system.

Roller sand making machine has become an ideal choice for sand making of medium and low hardness stone with excellent grain type, low energy consumption and maintenance, especially suitable for small and medium scale projects with high environmental protection requirements.

Economic choice: the comprehensive cost is 30% lower than that of impact breakers when the hourly output is ≤200 tonnes.

Intelligent upgrading: fully automatic hydraulic models (such as Huasheng Ming) support one-key grain adjustment and remote monitoring, which significantly reduces the dependence on manpower.

When selecting the model, it is necessary to match the hardness of the material with the production capacity, and strengthen the iron removal, lubrication and other supporting measures to maximise the efficiency of the equipment.