Rotary Kiln, rotary calciner, rotary furnace, rotary Lime Kiln

The Lime Preheater Rotary Kiln System：
The Lime Preheater Rotary Kiln is a state-of-the-art calcination system designed for producing high-quality active lime. It integrates three core components: a vertical shaft preheater, a rotary kiln, and a cooler. This system is widely recognized for its large production capacity, high product reactivity, fuel flexibility, and exceptional thermal efficiency—making it essential equipment in modern lime manufacturing.

Working Principle：
Limestone is first preheated to approximately 900°C in the vertical preheater using high-temperature exhaust gases (around 1150°C) from the rotary kiln. During this stage, the limestone undergoes 20–30% pre-decomposition before entering the rotary kiln for complete calcination. This "preheating + rotary" process design maximizes waste heat recovery, significantly reduces energy consumption, and enhances the reactivity of the final lime product.

Key Features & Advantages：
Efficient Preheating: The vertical preheater utilizes kiln tail exhaust gases to preheat limestone, lowering exhaust gas temperatures to below 280°C while achieving a 20–30% pre-decomposition rate before the material enters the kiln.
Energy Saving & Environmental Protection: Advanced waste heat recovery and sealing technologies (such as scale seals with <10% air leakage) reduce system heat consumption to as low as 4,500–5,300 kJ/kg. When paired with baghouse dust collectors, emissions consistently meet environmental standards.
High-Quality Output: The system produces lime with high reactivity (300–380 ml) and stable chemical composition, ideal for demanding applications such as steelmaking and chemical processing.
Fuel Flexibility: Capable of utilizing a wide range of fuels, including pulverized coal, natural gas, coke oven gas, and low-calorific value gases.

Technology & Specifications：
HBMER's Lime Preheater Rotary Kiln integrates advanced vertical preheater, rotary kiln, and vertical cooler technologies to deliver one of the most uniform calcination processes available for active lime and dolomite calcination. This design reduces energy consumption, increases production capacity, lowers operating costs, and achieves significant emission reductions.
Feed Material Size: 15–45 mm (production capacity is lower for 10–20 mm or 30–60 mm fractions)
Product Reactivity: Exceeds 420 ml
Fuel Options: Gaseous, liquid, solid, or mixed fuels
Production Capacities: Available in a comprehensive range: 100, 150, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, and 2000 tons per day.

HBMER Advantage: Proven Expertise
With extensive experience gained from over 150 active lime (and dolomite calcination) rotary kiln projects, HBMER has refined its technology to deliver superior performance. Our vertical preheater features exceptional heat exchange efficiency, and the system maximizes waste heat utilization while accommodating a broad range of material particle sizes. Compared to European and American technologies, HBMER offers significant competitive advantages in cost-effectiveness and adaptability to local operational conditions.