Product Details

Specifications

Lime Kiln
1.Unique air distribution device
2.high energy saving
3.full closed structure
ISO9001-2008 SGS

Lime rotary Kiln

Used to produce quicklime by the calcination of limestone (calcium carbonate)

The chemical equation for this reaction is: CaCO3 + heat → CaO + CO2

This reaction takes place at 900°C (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1000°C (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly

Excessive temperature is avoided because it produces unreactive, dead-burned lime

Rotary kilns started to be used for lime manufacture at the start of the 20th century and now account for a large proportion of new installations

The early use of simple rotary kilns had the advantages that a much wider range of limestone size could be used, from fines upwards, and undesirable elements such as sulfur can be removed

Our lime kiln features in, convenient and reliable control of the production process, less wearing parts, high rates of operation, the Lime kiln also has strong structure, stable operation, low energy consumption, high-quality products,large capability from the kiln and so on advantages, we can also offer advanced efficient shaft preheater, five grade cyclone preheater

Technical features of Lime rotary Kiln:

Take the 300T/d kiln as example, it can be regulated within 180 to 300T/d range without influencing quality and consumption targets

Chalk size: 400mm to 80mm

Size range ratio: 1:2

Kinds of fuel: natural gas, oil, cola dust, coke oven gas, coal gas of low heat value, and mixed fuel of all kinds of fuel (gas and gas, gas and liquid, gas and solid, liquid and solid, and more)

Lime products: fine lime and high activity (reaching 360mL, 4N HCL 10 minutes)

The ratio of lime stone under-firing and over-baking is 5 to 8%

Low heat wastage: they can make full use of heat energy when primary air passes, fuel gas is preheated when secondary air passes, cooled lime is preheated, fuel is burned completely

Structure features and process instruction of Lime rotary Kiln

Kiln body: rectangular or cylindrical

With double-deck burner girders in the kiln body with periphery burners in the middle kiln body

Waste gas drawing-out girder is set on the kiln top

Divided into five parts: material storage zone, preheated zone, calcining zone, posterior calcining zone,cooling zone

Storage zone: a part between kiln gas drawing-out device and crown, it is used for storing adequate lime stone in order not to stop producing when the crown feed device needs short-term maintenance

Preheating zone: a part between kiln gas drawing-out device and upper burner girder, used to preheat lime stone

Calcining zone: a part between upper burner girder and lower girder, where lime stone is calcined into fine lime, it's height can be regulated according to requirement of quality or lime stone physical property

Posterior calcining zone: a part between lower burner girder and lower gas drawing-out girder, the lime that was calcined will gain the even and refine quality and raise the activity, when through this zone that has the high temperature and no pressure

Rotary kiln,drying machine,cement kiln