Alumina Rotary Kiln For Sale

Alumina Rotary Kiln Introduction

The alumina rotary kiln is a key equipment used for calcining aluminum hydroxide or bauxite to produce alumina, integrating advanced domestic technology with advanced foreign processes. This equipment adopts multi-layer refractory lining and waste heat recovery system, which has the characteristics of high thermal efficiency and large production capacity, and is widely used in metallurgy, ceramics, and refractory materials industries.

Alumina Rotary Kiln Working Principle

By means of the elevator speaks stored in the silo is transported to the top silo of the preheater during recycling. By means of a kiln rotating at an incline (inclination 3%-5%), the limestone raw material is evenly distributed to the different chambers of the preheater by means of feed pipes.

At the same time in the kiln through the preheating zone (200-800 ℃ dry preheating), calcination zone (900-1200 ℃ high temperature decomposition) and cooling zone (cooling down out of the material) of the three temperature zones; when the lime is pushed by the hydraulic actuator into the kiln, the heat generated by the combustion of the discharged fuel or electromagnetic induction heating is transferred to the material through radiation, conduction and convection, which prompts the decomposition of the limestone (CaCO₃) into quicklime (CaO ) and carbon dioxide (CO₂) which is then cooled to 100°C by cold air from the cooler. The continuous rotation of the kiln body ensures that the material is heated uniformly, ultimately realizing a continuous and efficient calcination process.

Rotary Kiln For Alumina Characteristic  

Aluminum oxide rotary kiln is an efficient and continuous high-temperature calcination equipment with low energy consumption. The alumina rotary kiln adopts supporting wheel transmission, greatly reducing power consumption. Compared with the same level of alumina rotary kiln, the output has increased by 50%, and the thermal efficiency has increased by more than 30% compared to traditional equipment. Modular design supports large-scale production and is particularly suitable for alumina production processes such as aluminum hydroxide calcination and bauxite calcination. It is a key core equipment in the metallurgical and refractory industries.

The alumina rotary kiln is applied in the fields of metallurgy and chemical engineering, and is the core equipment for producing metallurgical grade alumina. But it can also be used for calcining high alumina bauxite to prepare refractory materials, and calcining high-grade metallurgical gold ore in refractory material factories; Its high temperature stability and large-scale continuous production capacity are widely used in various industrial fields such as electrolytic aluminum, refractory materials, ceramic glazes, etc.

Kiln Technical Parameters