Limestone is the major component of cement. Since the limestone from the quarry is variable, one needs to load from different areas in the quarry to ensure that the limestone quality is more consistent. Knowing what quality is currently on the pile then dictates from which areas in the quarry must be loaded from.
Small quantities of Fe, Al and Si, are added to the limestone clay mixture before the raw mill. Minalyser not only ensures that the blend ratios are at an optimum, but it also simultaneously monitor contaminant levels for excessive concentrations of sulphur, magnesium oxide, sodium and potassium.
Kiln consistency is critical to successful clinker production. The fuel properties and the burner settings control the shape of the flame. A too long or too short flame impacts negatively on the burning conditions. If for instance the ash content of the fuel is high, the flame length will increase. Then the burner settings and kiln operation must be adopted to shorten the flame back to its desired shape. If the fuel ash is however variable, it will cause unstable operation as the flame shape will change continuously – the clinker quality will therefore be variable as the corrective actions cannot change the operation that fast. Therefore, the properties of the coal to the kiln must be as consistent as possible.
Minalyser’s ability to measure organic and inorganic material mean that the Calorific and Ash values can be monitored and optimised by blending and stockpiling coal prior to the coal mill. Particle size of coal fed to the kiln can also be controlled with installation of an PSD analyser after the Coal mill.
