Dry Mortar Production Line

High-Efficiency Sand Drying and Dry-Mixed Mortar Production Line

In modern construction material manufacturing, the ability to produce high-quality dry-mix mortar efficiently, reliably, and with minimal environmental impact is a critical competitive advantage. Our Sand Drying and Dry-Mix Mortar Production Line integrates state-of-the-art drying, sand making machine, dry mortar mixer, packaging, and palletizing technologies to deliver a fully automated, high-capacity solution for the production of both cement-based and gypsum-based mortars. Designed for performance and durability, this line meets the demands of large-scale construction projects, precast factories, and ready-mix suppliers worldwide.

1. Advanced Drying System

At the heart of the production process is a three-pass rotary sand drum dryer, engineered for maximum thermal efficiency and minimal emissions. Heat is provided by a high-performance oil burner, ensuring consistent and controllable drying conditions. The system processes limestone aggregate in the 8–16 mm size range, with an initial moisture content of ≤ 5% and a final moisture level of ≤ 1%. The processing capacity ranges from 20 to 30 metric tons per hour, making it suitable for high-demand operations. Exhaust emissions are kept below 30 mg/Nm³, complying with stringent environmental regulations and reducing the plant’s ecological footprint.

2. Efficient Sand Making Process

The vertical shaft impact crusher is employed in the sand-making stage, transforming 8–16 mm limestone into dry sand with a particle size of ≤ 2 mm. The system delivers approximately 30 tons of dry sand per hour, with a controlled powder content of about 10%. This balance ensures optimal workability and bonding properties in the final mortar products. Like the drying system, the sand-making unit maintains exhaust emissions under 30 mg/Nm³, supporting clean and sustainable production.

3. High-Speed, Versatile Mixing Units

Two independent single-shaft high-efficiency mixers form the core of the blending process. Each mixer has a total volume of 2 m³, with a recommended loading coefficient of 0.4–0.6 to ensure homogeneous mixing.

• For cement-based mortar (bulk density 1.5–1.6 t/m³), each batch processes up to 1.3 t with a mixing time of 300 seconds, achieving an hourly output of 15 t.

• For gypsum-based mortar (bulk density 1.0–1.1 t/m³), each batch handles up to 1.2 t, also mixed for 300 seconds, yielding 10–15 t per hour.
  This dual capability enables manufacturers to serve diverse market segments without changing production setups.

4. Precision Bagging System

Each mixing unit is paired with three valve-type bagging machines. Operating at a rate of 180–200 bags per hour per machine (25 kg per bag), these units require close coordination with operators to maintain accuracy and speed. The bagging station ensures consistent fill weights and tight seals, which are essential for product quality and customer satisfaction.

5. Automated Palletizing with Robotic Technology

To complete the production cycle, the line incorporates a fully automatic robotic palletizer. Equipped with a single gripper, the system handles 550–600 bags per hour; with a dual-gripper configuration, output increases to 800–1,000 bags per hour. Both mixing units share one palletizer, optimizing space and capital investment. The robotic arm ensures precise placement, reducing product damage and improving stacking uniformity for storage and shipping.

6. Comprehensive Raw Material Handling

The line accommodates various raw material types with dedicated handling systems:

• Powders: Bulk cement is delivered via pneumatic conveying from bulk trucks directly into storage silos. Gypsum powder arrives in 1000 kg FIBCs (ton bags), which are manually unpacked and elevated by hoist to the silo.

• Additives: Supplied in 20–25 kg bags, additives are manually emptied into storage hoppers, then automatically metered and pneumatically conveyed to the mixing host. This flexible system supports the inclusion of fibers, retarders, accelerators, and other performance-enhancing agents.

7. Benefits and Applications

This production line is ideal for manufacturers seeking to produce high-consistency dry-mix mortars for applications such as masonry, rendering, tile adhesives, and gypsum plasters. The combination of a three-pass dryer, impact sand maker, and high-speed mixers ensures that each component of the mortar is produced to exact specifications. The automated bagging and palletizing stages further reduce labor costs and increase packaging speed, while the use of renewable and clean-burning oil fuel in the dryer helps control operating costs.

By integrating these elements into a single, cohesive system, the line offers:

• High capacity to meet large project demands.

• Consistent product quality with precise moisture and mix control.

• Low emissions to meet global environmental standards.

• Flexible formulation for both cementitious and gypsum-based products.

• Reduced labor dependency through automation.

In a market where speed, quality, and sustainability are paramount, our Sand Drying and Dry-Mixed Mortar Production Line provides a comprehensive, future-ready solution. Whether expanding current operations or establishing a new facility, this system equips manufacturers with the technology needed to compete and succeed in the global construction materials industry.