With nonlinearity, large lag and time-varying model parameters of cement rotary kiln, this paper proposed a burning zone temperature control system of cement rotary kiln based on CMAC neural network. By Dynamic adjustment of PID controller parameters with CMAC neural network, combined with rotary kiln temperature control mechanism, the temperature controller based on CMAC-PID was designed. Then...

Rotary cement kiln is the main part of a cement plant that clinker is produced in it. Continual and prolonged operation of rotary cement kiln is vital in cement factories. However, continual operation of the kiln is not possible and periodic repairs of the refractory lining would become necessary, due to non-linear phenomena existing in the kiln, such as sudden falls of coatings in the burning ...

Aiming at the measurement of cement rotary kiln’s axis, the paper presents the design method of a wireless dynamic measurement system for rotary kiln’s axis. A wireless sensor network monitoring system that can collect multiple parameters was designed, which integrates the detection functions for kiln shell axis deviation, kiln tire axis deviation and drive gear synchronizing signal, and has th...

The Rotary Kiln forms the heart of the cement manufacturing plant where most of the energy is being consumed by the burning of clinker, which when powdered and mixed with gypsum gives cement. In order to assure acceptable qualities for the clinker, it is important to make sure that the raw meal fed to the rotary kiln has been properly burnt for which the temperature in the burning zone needs to...

This article presents a mathematical model of cold gas-solid two-phase flow which is based on the cement rotary kiln in service. By altering the parameters of air supply system of fourchannels pulverized burner, investigations are taken of that motion trajectory and particle distributions in the very turbulent field. The results show that motion trail of most particles in rotary kiln is a combi...

During combustion of alternative fuels in the material inlet end of cement rotary kilns, local reducing conditions may occur and cause reductive decomposition of sulfates from calcined cement raw materials. Decomposition of sulfates is problematic because it increases the gas-phase SO2 concentration, whichmay cause deposit formation in the kiln system. In this study, the release of sulfur from ...

In terms of absolute consumption, the cement industry occupies a front position in the ranks of energy consumed industries. The total energy costs (thermal and electrical) make up about 30 to 40 percent of the total production costs of cement. This is why efficient energy utilization has always been a matter of priority in the cement industry. Cement manufactures requires very high temperatures...

INTRODUCTION The purpose of this synthesis of available information was to provide the Texas Department of Transportation (TxDOT) with a concise document on the state of the practice regarding the use of kiln dusts for stabilization of subgrade soils or granular base materials in highway pavements. This document should assist TxDOT in making decisions related to allowing the use of kiln dusts a...

This report presents the chemical and physical factors governing the generation of sulfur dioxide (SO2), its transformation into other sulfur compounds, and the removal of sulfur oxides within the cement kiln system. Sulfur in cement kilns is derived from both kiln feed and from the kiln fuel. The form of the sulfur dictates the location in the kiln where the SO2 generation takes place. Sulfur ...

Cement production is highly energy intensive and requires large quantities of fuels. For both economical and environmental reasons, there is an increasing tendency for utilization of alternative fuels in the cement industry, examples being tire derived fuels, waste wood, or different types of industrial waste. In this study, devolatilization and combustion of large particles of tire rubber and ...