Modern cement production with chalk

Summary: Today, hardly any question is raised as regards the winning and preparation of conventional carbonate rock (limestone, marl). Meanwhile there are proven standard methods for the majority of theses widespread cement raw materials, and it is easy to compile a practicable winning and preparation concept based on these methods. Chalk is a very special cement raw material. It is not easy to handle this chalk due to its fineness and moisture. Tailored solutions are in demand. All known processes to make Portland cement clinker from chalk are presented in this article. Problems of winning and preparation are in the focus. From his point of view the author favours a graded modernisation of old factories operating according to the wet process.

1 Chalk as cement raw material

As regards conventional carbonate rock (limestone, marl), problems of quarrying and preparation are only dealt with in passing. Meanwhile there are proven standard methods for the majority of these widespread cement raw materials, and it is easy to compile a practicable quarrying and preparation concept based on these methods. Chalk, however, requires an approach taking into account the peculiarities of this material and of the specific deposit when selecting the process. Many methods and equipment for quarrying, handling and storage, working well in other cases,...

Related articles:

Issue 1/2021 SK532019A3

Heating complex of the cement kiln/lime kiln and high heat consuming devices

(22) 17.05.2019 (43) 02.12.2020 (57) The heating complex of a cement kiln/lime kiln and high heat plant consists of a separate pyrolysis reactor (A) with a raw material inlet (C) of...

more
Issue 7-8/2020 SK1902019 (U1)

Heating complex of the cement kiln/ lime kiln and high heat consuming devices

(22) 17.05.2019 (43) 04.05.2020 (57) The heating complex of the cement kiln or lime kiln or high heat consuming devices consists of a separate pyrolysis reactor (A) with a raw material input (C) of...

more
Issue 9/2015 A TEC/W&P ZEMENT/SCHEUCH

Breaking the mercury cycle for ­emission abatement with the “ExMercury – ­Splitted Preheater System”

1 Introduction The reduction of anthropogenic mercury emissions is of great interest, especially since it was agreed at the Minamata convention in 2013 which provided a basis for a worldwide reduction...

more
Issue 11-12/2020 US 2020/0261845 A1

Method and apparatus for reducing mercury content of cement kiln exhaust gas

(22) 13.11.2017 (43) 20.08.2020 (57) An apparatus for reducing mercury content of cement kiln exhaust gas 11 comprising: a mixing and heating device 19 for mixing cement kiln dusts D2, D4 included in...

more
Issue 8/2023 CN116499260 (A)

Preheater system of cement clinker production line

(22) 21.04.2023 (43) 28.07.2023 (57) The invention discloses a cement clinker production line preheater system which comprises a plurality of stages of cyclones, connecting pipelines of the cyclones...

more