Integrated quality ­assurance from the quarry to the raw meal silo

If lime, marl and clay from different sources in variable quality and alternative raw materials are fed to a mixing process, a specific strategy for the mix-bed structure and in controlling the material composition before the mill is required. ABB there has such a system, which is presented in the following.

1 Introduction

Highly variable material in the quarries, the usage of alternative raw materials (for instance fly ashes and sewage sludges) as well as the cost pressure regarding the employed corrective materials: these factors total up to form a complex set of tasks when manufacturing raw meal for the production of cement clinker. This situation calls for the use of integrated mixture control concepts starting in the quarry control the blending bed stacking and assure minimum standard deviation of the lime standard and other moduli upstream of the mill and in the material taken from the...

Related articles:

Issue 2009-06-07

Material analysis for process control in cement plants

1 Introduction Online measuring methods are indispensable for process control in cement factories. However, while measurements of temperatures, pressures, filling levels, flow rates, motor powers and...

Issue 2021-8 ZADCON GMBH

Design of blending beds

B?lending beds are coming into increasing use in the cement, iron and steel and other industries. A blending bed, in general, has three functions: Storage serves for stocking of sufficient feed...

Issue 2016-5 BEUMER GROUP

Relying on regularity – blending beds for different bulk goods

In many industrial processes – as for ­example in the cement industry – the regularity of the raw materials used plays an important role in the manufacture of products. This uniform consis-tency is...


Use of markers in production process monitoring and for the characterization of building materials

1 Introduction Deficiencies of construction and structural damage affecting new buildings are currently causing an enormous amount of macro-economic damage in Germany. They account for some 2.5?%–3?%...


Operating experience with the new Polysius-Quadropol2 raw mill

The fundamental market demands on a cement raw material grinding plant are high throughput rates and drive power combined with small construction size and high availability. These are precisely the...