AIXERGEE GMBH

Burn-out characteristics of lumpy secondary fuels and requirements for the design of calciners in the cement industry

A productive procedure for characterizing the pneumatic and combustion behaviour of lumpy secondary fuels is described. This can be used for calculating realistic flow and combustion processes.

1 Conventional design of calciners in the cement industry

Calciners were introduced into the thermal lines for producing cement clinker in the second half of the last century and have brought about a substantial advance in technology for the cement industry, resulting in significant increases in performance of the kiln lines [1]. Since then many improvements have been proposed for this technology and implemented in product innovations [2-6].

As already described in [7] the fundamental idea behind calciner technology is based on the finding that the most energy-intensive process step in the...

Related articles:

Issue 11/2015 WO 2015/133161 A1

Cement burning apparatus, and method for denitrating exhaust gas from cement kiln

(22) 08.01.2015 (43) 11.09.2015 (57) [Problem] To efficiently reduce the concentration of NOx in an exhaust gas from a cement kiln while keeping the burned state at a good level regardless of the type...

more
Issue 7-8/2018 EP3317231 (A1)

Process for producing cement using a secondary fuel

(22) 30.06.2016 (43) 09.05.2018 (57) Summary of the corresponding patent WO2017001638 (A1): The invention provides a process for producing cement, the process comprising providing heat to a cement...

more
Issue 4/2016 US 2016/0046525 A1

Plant for producing cement clinker with gasification reactor for difficult fuels

(22) 04.04.2014 (43) 18.02.2016 (57) A plant for producing cement clinker, comprising as viewed in the direction of materials flow, a heat exchanger to preheat raw meal, a downstream calciner to...

more
Issue 04/2013

Heat production for the thermal drying ­process in the industry

Hot gas generators are usually in use when drying raw materials such as ore, limestone, phosphates, gypsum or coal, in order to reduce the moisture for the further production or refinement of products...

more
Issue 12/2017 US2017291851 (A1)

Method and arrangement for burning lime mud

(22) 09.05.2017 (43) 12.10.2017 (57) An arrangement for burning lime mud into lime in a lime kiln. The lime mud flows counter-currently to flue gases from a feed end to a firing end and the fuel used...

more