Rotary Kiln
Rotary Kiln
Viki Refractory Works Manufacturing Rotary Kiln and supplies Ahmedabad & All over india.
Rotary Kiln typically 55 meters long with a four-meter diameter, the Waelz Kiln is slightly inclined 2-3% and has an approximate rotary speed of 1.0 rpm. As the moist material moves through the rotary kiln, it is dried and preheated by the kiln gas, flowing in a counter-current pattern. In the reaction zone, reduction of the metal oxides occurs around 1200°C as the zinc is vaporized as metal vapor into the gas cleaning system. Zinc is then re-oxidized in the kiln atmosphere that is operated with excess air (process air is injected from the kiln end). Chlorine and alkalis volatilize jointly with the heavy metals and the dust-laden off-gas is treated in a downstream off-gas system.
Applications
- Rotary Kilns are used for the calcinations of Titanium Dioxide, Barium Carbonate, Magnesium Carbonate, Silica Gel, Lime, Rotary Carbonizer for Activated Carbon, Vermiculite, Barium Sulfide, Magnesium Oxide, Rotary Hearth Furnace process for steel dust recycling and iron making etc.
Availability
features
- Rotary Kilns are normally direct fired and lined with refractory material to protect the steel shell reduce radiation losses and transfer heat to the material.' A typical Rotary kiln is cylindrical shell slightly inclined from the horizontal and supported on two or more tyres which in turn rotate on rollers. ' One of the tyre is fixed axially by a set of thrust rollers to care of the thrust load during kiln movement. ' The drum assembly along with the tyres are rotated by a girth gear/ pinion arrangement. Shell diameter and length are generally designed to suit specific products.' Heat Transfer in Rotary kiln : - All kilns are heat exchangers and the heat is transferred in a variety of ways by radiation convection and conduction.' The waste heat recovery system is laid for energy saving.' Dust in the waste gas such as zinc lead is very viscous and adhesive at high temperatures thereby causing clogging easily depending on the construction of the waste gas treatment system.