Estimation of coating thickness in a rotary kiln by using shell temperature and kiln modeling

1 Schematic of the clinkering process

2 Thicknesses of the shell along the different sections of the rotary kiln

3 Sectional scheme of the rotary cement kiln showing heat exchanges between gas, solid and wall

4 Mass balance of the kiln system

5 The heat transfer equivalent resistors: a) In the contact area between the coating and hot gases, b) In the contact area between the coating and solid

6 Symbols used in the heat transfer equations from the adjacent cylindrical layers

7 Output of coating thickness calculation computer program using three maximum, medium and minimum temperatures obtained from scanner

Der Drehrohrofen im Zementwerk Chekka/Nordlibanon

In a rotary kiln very versatile and complex processes take place that are strongly nonlinear and time dependent. Efficient protection of the coating in the sintering zone during kiln operation is an important problem from the standpoint of productivity of the kiln. The purpose of this study is to develop a computer program for evaluating the coating thickness in various sections of the kiln.

1 Introduction

Cement is made by grinding gypsum and clinker burned from a mixture of limestone and clay in a certain percentages. A kiln is the most vital part of a cement factory and its outcome is clinker. Cement is the essential material for civil engineering construction works. The chemistry of making cement was studied in some detail (Bouge 1995, Lea 1956). Output from the cement industry is directly related to the state of the construction business in general and therefore closely tracks the overall economic situation in a region or a country (Laszlo, Ignacio, Antonio, Peter 2008).

Cemen...

TEXT Golamreza Noshirvani, Mansour Shirvani, Javad Askari-Mamani and Hamidreza Nourzadeh

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