Simulation of lime calcination in PFR kilns – Influence of source and size of limestone

Besides the influence of energy consumption and throughput, the origin and the particle size of the limestone during calcination in the PFR shaft kiln are important.

The previous article presented a one-­dimensional mathematical model to describe and simulate the lime calcination process in a PFR lime shaft kiln [1]. The model was used to calculate the core/surface temperatures of the solid (limestone lime) particles, the gas temperature, the residual CO2, the pressure drop along the bed height and the local wall heat loss. The effects of two operating parameters, the energy input and the kiln throughput, were investigated.

1 Introduction

Lime burning is a complex process due to the variety of parameters which exert influences on the process. In principle,...

Related articles:

Issue 2012-02

Second lime kiln for Karadeniz

Karadeniz Madencilik San. ve Tic. Ltd. S¸ti., domiciled in Istan­bul, Turkey, placed an order with Maerz for the supply of engineering, license, know-how and equipment as well as technical...

more
Issue 2015-10 OTTO VON GUERICKE UNIVERSITY MAGDEBURG

Simulation of limestone calcination in ­normal shaft kilns – Part 2: Influence of process parameters

1 Introduction The calcination of limestone in normal shaft kilns is a complex process, since it is influenced by a variety of parameters. These influencing factors are: the operating variables such...

more
Issue 2016-5 EESAC SAS DUINGT/FRANCE

Understanding the process conditions in a parallel flow regenerative kiln

1 Initial status The first step of the study consisted in establishing a global heat and mass balance of the kiln. The energy balance is summarized in Table 1. The energy balance actually highlighted...

more
Issue 2014-12 OTTO-VON-GUERICKE-UNIVERSITÄT MAGDEBURG/GERMANY

Energy consumption and CO2 content in the flue gas of normal shaft kilns: Part 2: Influence of the limestone quality and the process parameters

1 Influence of the CO concentration in the flue gas The lime shaft kiln is used in the lime industry in order to produce so-called medium to hard-burnt lime. This type of kiln is also used in the...

more
Issue 2010-06

Thermophysical properties of limestone as a function of origin (Part 2): Calcination enthalpy and equilibrium temperature

1 Introduction For the energy evaluation of the calcination process in kilns two enthalpy values are required: the enthalpy at normal temperature and the enthalpy at decomposition temperature. The...

more