Trends in cement kiln pyroprocessing

Plant engineering companies supplying the cement industry have recently started talking about plants oriented to the needs of the customer. Attributes such as “tailor-made” or “standardized” seem to be a thing of the past.

1 Introduction


In recent years there have been no really new and profound technical developments in kiln technology and none are to be expected in the cement industry in the foreseeable future. Nevertheless, there are a number of trends that have a great influence on purchasing decisions and on current technology standards:

Dry process with preheater and calciner

Most usual plant sizes between 3000–6000 tpd

Specific heat consumptions of < 725 kcal/kg cl ­(5-stage preheater)

Specific electrical energy requirements < 90 kWh/t

Lowest possible emission rates (NOx, SOx, dust, noise)

Automatic plant...

Related articles:

Issue 6/2021 MAERZ OFENBAU AG

Sustainable lime burning technology with shaft kilns

1 Introduction Not only climate change and climate goals, but also the 64 CO2 pricing instruments used worldwide until the beginning of 2021 (the number is steadily increasing) are the main reasons...

more
Issue 8/2021 MAERZ OFENBAU AG

New PFR lime kiln process with blast furnace gas and oxygen

The annual worldwide lime production amounts to approximately 400 million t and roughly 50% thereof is used for the iron and steel industry. Large steel mills often operate their own lime kilns and it...

more
Issue 5/2021 MAERZ OFENBAU AG

Replacing mixed feed lime kilns

1 Mixed feed shaft kilns Mixed feed shaft kilns in the lime, soda and sugar industries are in operation in large numbers worldwide. They are often used where high CO2 exhaust gas concentration or lime...

more
Issue 06/2014 AIXERGEE PROCESS OPTIMIZATION

Burning alternative fuels in cement kilns

1 Suitability of cement kilns for the combustion of secondary fuels Compared to other high energy-intensive production processes of cement clinker burning process allows a relatively high potential...

more
Issue 6/2022 MAERZ OFENBAU AG

Is it sufficient to use renewable energy sources for lime kilns to achieve the climate goals?

Introduction Climate change is becoming more and more noticeable, which is why global warming should be limited to 1.5 °C as already targeted by the Paris Climate Agreement in 2015. To achieve this...

more