The Maerz hybrid kiln for variable lime reactivity

At the International Lime Association’s General Assembly and Information Exchange Forum in October 2019 in Buenos Aires/Argentina, Maerz Ofenbau AG introduced a new kiln type permitting the production of lime with variable reactivity by combining the thermal efficiency of the parallel flow regenerative process with the features of a counterflow kiln.

1 Introduction

The development of modern lime kilns to date has been focusing on the optimisation of the specific heat consumption as well as on the flexibility to use a wide variety of fuels. Little attention was paid to the flexibility of producing lime with variable reactivity. Hence, the kilns were either optimised to produce high reactive lime with the Parallel Flow Regenerative (PFR) lime kiln, originally invented by Maerz Ofenbau AG, as being one of the most commonly built kiln types throughout the world, or to produce medium or low reactive lime, with mainly single shaft kilns based on...

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