Tunnel kiln: innovative application in industrial and mining production

01
Overview of Tunnel Kiln Calcination Process

By drawing on the mature tunnel kiln technology, aluminum ash, calcium aluminate and other industrial solid wastes are pressed into shape and then calcined at high temperature in a static manner, which not only improves the calcination efficiency and product quality, but also achieves the goals of clean production and resource utilization.

02
Process Features

Pressing and Forming

The material needs to be pre-treated before entering the kiln, and then pressed into a block, hollow or porous structure through high-pressure forming equipment. This not only improves the air permeability and heat conduction efficiency of the material, but also helps the subsequent calcination process to be evenly heated and fully reacted.

Static calcination mode

Different from the dynamic stirring calcination of the traditional rotary kiln, the tunnel kiln adopts a static calcination mode, which avoids the wear and dust problems caused by material turning, and is more conducive to controlling the calcination temperature curve and improving product stability and consistency.

Highly sealed design

Double kiln door design, the entire calcination process is carried out in a closed environment, effectively preventing the leakage of harmful gases such as chloride ions, nitrogen oxides, and carbon dioxide, reducing the risk of environmental pollution, and also reducing the problem of agglomeration and blockage inside the kiln body.

Waste heat recovery and purification

The high-temperature flue gas discharged after calcination can be used to preheat new materials through the waste heat recovery system to achieve energy recycling. At the same time, the flue gas is discharged in compliance with the standards through a unified purification system (such as dust removal, desulfurization, and denitrification), further ensuring environmental safety.

Highly automated control

With the help of modern sensing technology and intelligent control systems, the entire production line can achieve full-process automated operation from raw material mixing, pressing and molding, automatic stacking, kiln calcination to finished product kiln discharge. This not only greatly reduces labor costs, but also improves the continuity, stability and safety of production.