In the pre-treatment stage of an AAC block production line, the ball mill plays a crucial role as a particle size controller for raw materials. Its grinding performance directly impacts the uniformity of the AAC aerated concrete slurry and the strength of the resulting AAC blocks (autoclaved aerated concrete blocks). As the core equipment of the Rich AAC plant (a professional AAC block equipment manufacturer), this ball mill is specifically designed for AAC production. It grinds raw materials such as sand, gravel, fly ash (suitable for sand/fly ash block production lines), and limestone into a fine powder (particle size ≤ 0.15 mm) that meets AAC production standards. It seamlessly connects the raw material storage system with downstream slurry tanks and AAC pouring mixers. This core equipment is essential for both small AAC block plants and large-scale autoclaved aerated concrete (AAC) production lines striving for stable production capacity and low costs.
1. Core Design Advantages for AAC Raw Material Grinding
This ball mill differs from general-purpose ball mills in its custom design for the characteristics of AAC raw materials (such as high-hardness sand and gravel and light fly ash). Its four core advantages precisely match grinding requirements:
1.1 Multi-chamber Grinding Structure for Precise Particle Control
The inner chamber of the ball mill consists of three to four continuous grinding chambers, each filled with grinding media of varying sizes (high-chromium steel balls: Φ60 mm for coarse crushing, Φ30 mm for fine crushing). Raw materials enter the first chamber for initial crushing, then enter subsequent chambers for progressively finer grinding. The resulting powder has a uniform particle size distribution (PSD), preventing both over-grinding (which wastes energy) and under-grinding (which causes slurry clumping). This ensures that the final product meets the density requirements for AAC blocks (500-700 kg/m3) and the raw material fineness standards specified in the IS code for AAC blocks.
1.2 Highly Wear-Resistant Lining Extends Equipment Life
To combat the wear of hard raw materials (such as quartz sand), the ball mill cylinder is lined with 15-20 mm thick, wear-resistant high-chromium steel plate. Compared to ordinary manganese steel liners, this material offers a service life 2-3 times longer, reducing the frequency of liner replacement and lowering maintenance costs for the AAC block plant. Furthermore, the liner is removable for easy replacement, minimizing downtime in the continuous AAC production line.
1.3 Intelligent Speed and Load Control for Stable Operation
The ball mill is equipped with a variable frequency drive (VFD) and load sensor, enabling precise adjustment of grinding parameters:
Grinding speed: Adjusts according to material type (e.g., 18-22 rpm for sand and gravel grinding, 22-25 rpm for fly ash grinding) to optimize crushing efficiency;
Material load monitoring: Sensors monitor the material level in the mill in real time. If the load is too high (potentially causing motor overload), the system automatically reduces the feed rate; if the load is too low (causing energy waste), the feed rate is increased – ensuring stable operation.
2. The Unique Value of This Ball Mill for AAC Plant Operators
2.1 Stable Raw Material Quality
Stable particle size control ensures uniform viscosity of the AAC slurry prepared in the downstream pouring mixer—reducing AAC block defect rates (e.g., blocks with uneven density) by 12%-15%, which is crucial for meeting market unit price and pricing standards for AAC blocks.
2.2 Low Total Cost of Ownership
High Energy Efficiency: Variable frequency drives reduce power consumption by 10%-15% compared to fixed-speed ball mills.
Low Maintenance: Highly wear-resistant liners and automatic fault detection reduce maintenance time by 30%, making it particularly suitable for small AAC block plants with limited technical staff.
2.3 High Compatibility with AAC Production Line Equipment
Seamlessly integrates with other AAC equipment:
Upstream: Connects to raw material screening and drying equipment (suitable for sand-lime/fly ash block production lines);
Downstream: Directly feeds the slurry tank and integrates with the AAC pouring mixer, supporting automated AAC production lines and autoclaved curing brick production lines.
As part of the Rich's comprehensive range of AAC plant solutions, this ball mill can be combined with an AAC block cutter, autoclave, and mesh welder to form a complete AAC block production line – helping customers optimize the AAC block manufacturing process from raw materials to finished product.
To meet diverse production needs, Henan Ruichi offers a variety of ball mill models:
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