Redesigning raw mix burning behaviour and its impact on kiln productivity

摘要

Variations in the chemical composition of raw mixes affect kiln operation, refractory line, fuel consumption, clinkerization and finally clinker quality. Clinker is formed through extremely physio-chemical transformations at regular temperature intervals and therefore characterization and evaluation of the raw mix is essential for achieving a suitable design of the raw-mix, smooth operation of the kiln producing better quality of clinker and also increasing the kiln productivity. The laboratory raw mix burnability study aims at highlighting the reactivity of the raw mix and its effects on the behaviour of the raw materials with the reaction sequence and kinetics of clinker formation. These burnability studies will prove to be effective for reduction of energy consumption and other improvements in the technology involved for clinker production finally leading to increased kiln productivity and achieving high potential clinker. In this laboratory raw mix burnability study, the lime saturation factor and silica modulus were maintained almost constant except the alumina modulus and residue percentage at 212 urn. The raw mix having increased the A/M ratio and reduced the residue percentage at 212 um has the compatibility for facilitating clinkerization. The basic reason for keeping this type of raw mix moduli values was to study the effect of burnability with change in alumina moduli values and also to study the burning behaviour with change in the raw mix residue at 212 and 90 μm.