Pre-Homogenization System
A combined stockpiling and reclaiming system that homogenizes limestone, coal, and auxiliary materials before grinding. Available in circular, bridge scraper, and side scraper designs — reducing chemical variability and ensuring stable kiln operation and consistent clinker quality.
Product Overview
The stacker and reclaimer is the core equipment of the cement plant's pre-homogenization stockyard — the stage between raw material crushing and raw mill grinding. After primary crushing, limestone (and coal for the kiln) is stored in long stockpiles. The stacker builds the pile in a controlled chevron or windrow pattern, layering material so that vertical composition variations are averaged out. The reclaimer then cuts across the pile face, reclaiming a blended cross-section that has far less chemical variability than the incoming feed.
Why does this matter? Limestone from a quarry varies in calcium carbonate (CaCO₃) content, silica, alumina, and iron oxide. If these variations reach the kiln unmitigated, clinker chemistry fluctuates, fuel consumption rises, and refractory life suffers. Pre-homogenization with a stacker-reclaimer typically reduces composition variability by 5-10:1, ensuring the raw mill receives a consistent feed and the kiln produces uniform clinker.
LIMING supplies three main configurations — circular, bridge scraper, and side scraper — to match your stockyard layout, available space, material characteristics, and capacity requirement. All designs feature robust structures, hardened scraper chains, and automated PLC control for unmanned operation.
Classification
Each type suits a different stockyard geometry and capacity requirement.
Combined stacker and reclaimer rotating around a central column in a circular stockpile (dome or open). Compact footprint — ideal when space is limited. Stacking and reclaiming occur simultaneously on different sections of the pile. Typical for medium-capacity plants.
A bridge spans the longitudinal stockpile, with a scraper chain traveling along it. Reclaims the full pile cross-section in one pass, achieving the highest homogenization ratio. Ideal for large-capacity limestone pre-homogenization in long, linear stockyards.
Scraper arm moves along the side of a longitudinal pile, reclaiming material from the side face. Lower structure height, simpler civil works. Suitable for medium-capacity applications and materials with limited cohesion.
Key Benefits
Engineered for high homogenization ratio, reliable continuous operation, and low operating cost.
Chevron stacking combined with full-face reclaiming reduces feed composition variability by 5-10:1 — stabilizing raw meal chemistry and improving clinker consistency.
Stacking and reclaiming can proceed simultaneously and continuously. Automated PLC control enables unmanned 24/7 operation with remote monitoring.
Welded steel structures designed for harsh outdoor conditions. Hardened scraper chain and wear-resistant buckets ensure long service life with minimal maintenance.
Circular, longitudinal, or side-reclaim configurations fit any stockyard geometry — open or domed. Custom boom length and reclaim capacity match your tonnage requirement.
How It Works
The system operates in two phases — stacking (building the homogenizing pile) and reclaiming (recovering a blended cross-section). The combination creates the pre-homogenization effect.