Screw conveyors deployed in AAC production realize stable transportation of cement, lime, fly ash and other powdery raw materials, while cutting material leakage, dust emission and raw material loss.

Equipped with enclosed structures and controllable feeding systems, these conveyors achieve cleaner material transfer, steady material flow and dependable operation for contemporary AAC production lines.

Tips at a Glance

Key Point	AAC Screw Conveyor Solution
Material Leakage Control	Closed conveying structure prevents powder overflow during transportation
Dust Reduction	Enclosed housing limits contact between fine materials and air
Stable Feeding	Uniform screw rotation ensures continuous material delivery
Material Protection	Low-speed conveying reduces segregation and unnecessary impact
Flexible Layout	Horizontal and inclined designs adapt to different plant arrangements

Sources of Leakage and Dust in AAC Material Conveying

AAC production involves multiple powder-based raw materials. Before entering the mixing process, these materials need to be transported from storage areas, silos, or weighing systems.

Common AAC materials include:

• Cement powder
• Quicklime powder
• Fly ash
• Ground sand powder
• Gypsum powder
• Other fine additives

Fine Powder Characteristics

Most AAC raw materials are light and easy to disperse. When transported via traditional open-type equipment, fine particles can diffuse outward due to vibration, collision and rapid material motion.

Continuous Feeding Requirements

Consistent raw material ratios are essential to AAC production. Unexpected material buildup and non-uniform feeding disrupt slurry mixing procedures, resulting in degraded performance of final blocks.

Closed Transportation Demand

Powder raw materials are suitable for closed transportation, which can isolate material transfer from the workplace. Screw conveyors applied in AAC production are equipped with enclosed casings or troughs to retain materials inside the conveying channel.

Leakage Control Measures of Screw Conveyors in AAC Production

Screw conveyors for AAC manufacturing are distinguished by sealed conveying structures. In contrast to belt conveyors and open conveying systems, materials travel inside a closed housing propelled by revolving screw blades.

Closed Conveyor Structure

AAC screw conveyors normally consist of:

• Conveyor housing
• Spiral screw blade
• Driving motor
• Inlet and outlet ports
• Supporting structure

The enclosed shell constitutes an isolated transportation passage. When the equipment runs, powders stay inside the conveyor unit and avoid leakage beyond the conveying path.

Controlled Material Movement

The rotating screw blade pushes materials forward at a stable speed. Compared with free-falling transportation methods, screw conveying reduces sudden material impact and powder scattering.

The controlled movement helps maintain:

• Stable material flow
• Reduced powder overflow
• Lower material loss
• Cleaner working areas

Sealed Connection Design

Leaks generally emerge at the joints between processing equipment. In accordance with workshop layout, AAC screw conveyors can be equipped with custom-designed inlets, outlets and flange connections.

Customized screw conveyor schemes for different AAC production lines can align with silo discharge openings, weighing equipment, mixers and other device interfaces to narrow connecting gaps effectively.

How AAC Screw Conveyors Reduce Dust Problems

Effective dust management concerns environmental cleanliness, and simultaneously plays a vital role in equipment upkeep and operational productivity.

Fully Enclosed Powder Transportation

The enclosed structure prevents powder materials from directly contacting airflow during transportation. This reduces:

• Dust escaping from the conveying route
• Material accumulation around equipment
• Cleaning frequency
• Secondary material waste

For AAC factories using large quantities of cement and lime, enclosed screw conveying provides a more controlled material handling method.

Low-Speed Conveying Principle

AAC screw conveyors adopt controllable operating speeds. Different from high-speed transport systems, materials are advanced steadily inside the equipment by rotating screw blades.

Internal violent flow disturbance can be minimized in this way, effectively avoiding light fine powders turning into airborne dust.

Improved Workshop Conditions

When powder leakage is reduced, the surrounding production area becomes easier to maintain.

A cleaner conveying process helps:

• Protect electrical equipment
• Reduce dust accumulation
• Improve maintenance conditions
• Maintain a more stable production environment

AAC Materials Suitable for Screw Conveyor Transportation

Material	Conveying Application
Cement	Transfer from storage or silos to batching systems
Quicklime	Controlled feeding before grinding or mixing
Fly Ash	Powder transportation in slurry preparation systems
Gypsum	Additive feeding and proportioning
Fine Sand Powder	Transfer after grinding process

AAC Screw Conveyor Design Features

Screw Blade Design

The screw blade is the core component responsible for material movement.

Different blade designs can influence:

• Conveying efficiency
• Material residence time
• Feeding stability
• Power consumption

For powder materials with different densities, the screw structure can be adjusted to achieve smoother transportation.

Conveyor Housing Design

The housing protects the transported materials from external contamination while preventing powder leakage.

Typical housing options include:

• Tubular housing for enclosed powder conveying
• U-shaped trough structure for easier maintenance
• Customized shapes according to installation requirements

Inlet and Outlet Optimization

Conveying stability is largely determined by the inlet and outlet sections.

Reasonably configured feed openings help eliminate material clogging, and optimized outlet arrangement enables steady material delivery toward mixers, storage containers and weighing systems.

Due to inconsistent equipment layouts among different manufacturers, AAC production lines frequently require tailor-made outlet designs.

AAC Screw Conveyor vs Open Conveying Methods

Feature	AAC Screw Conveyor	Open Conveying Method
Structure	Closed transportation system	Usually exposed structure
Dust Control	Better powder containment	Higher exposure risk
Material Protection	Stable enclosed movement	More affected by external conditions
Installation	Flexible layout options	Requires more space planning
Powder Application	Suitable for cement, lime, fly ash	Less suitable for fine powder

As powdery raw materials occupy a large share of material handling work in AAC production, closed conveying systems enable more effective process control.

Custom AAC Screw Conveyor Solutions

Equipment configurations, production throughput and raw material conditions vary among AAC production lines. Generic screw conveyors often fail to adapt to particular installation specifications.

Custom AAC screw conveyors can be developed based on:

• Conveying distance
• Material characteristics
• Required capacity
• Equipment connection points
• Factory space limitations

AAC screw conveyors adopt closed structures and steady operation to transport powders, which curbs leakage and dust generation and ensures consistent feeding performance.

When dealing with cement, lime, fly ash and other raw materials in AAC facilities, screw conveyors enable environmentally friendly, dependable and high-efficiency conveying work.