Raw Materials for Lime Burning Limestone, Fuel and Refractories

The limestone, fuel and refractory linings used for lime burning should be selected with care in the context of the kiln design and the required quicklime quality. For a new installation, the kiln supplier should be able to test and assess the suitability of the raw materials. For an existing lime works, the potential effects of proposed changes in the limestone, fuel or refractories should be assessed with care. 

When selecting a limestone for the production of quicklime, the necessary tests should be done to ensure that it is suitable in all respects. Indeed, in the context of present day requirements for quicklime, only a small proportion of limestone deposits are suitable for lime burning. 

The following requirements should be taken into consideration when assessing the quality of a limestone deposit. 

In addition, the quality of the selected grade of processed limestone should be assessed, in terms of  

Limestones that are relatively soft, are subject to thermal degradation, or produce a soft lime may not be suitable for calcining in shaft kilns. They may, however, be calcined in certain types of rotary or other kilns (see section 16.4.11), 

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Raw Materials for Lime Burning (Limestone, Fuel and Refractories)... 

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