Talk:Cement kiln

Comment
I have opened up a new article for this, allowing reference from product related articles. The existing article on Portland cement references Kiln, which refers only to ceramics kilns, and which would become unweildy if extended to include every piece of equipment that is called a "kiln". I will expand this article shortly, and welcome other informed contributions.LinguisticDemographer 16:11, 1 October 2006 (UTC) I have now added a bunch of text. I am aware that the text is hard to understand without diagrams and pictures. I'll remedy that when I get a moment.LinguisticDemographer 01:59, 2 October 2006 (UTC)

Emissions section
Following incorporation of the "Emissions" article, I have tidied it up a bit. I took out the sentence:

"Investigations have shown that their (i.e. "dioxins and furans") emissions are independent of the type of input materials used and cannot be influenced by process technology measures."

I removed it because it's patently untrue on both counts. Clearly, some materials (e.g. those containing halogens) are more likely to produce D&F than others, and many plants are in fact using process technology (involving control of temperature profiles) to control them. Maybe "investigations" did show this, but obviously other investigations show the contrary. . . .LinguisticDemographer 11:27, 28 June 2007 (UTC) p.s. There is no citation in this section. It appears to be based on the report of a very comprehensive research project performed by VDZ a while back. I thought the original article mentioned it, but I can't find it in the "history". If anyone can pin it down, it would be helpful. . . .LinguisticDemographer 11:42, 28 June 2007 (UTC)

Stoichiometry
This is a wonderful article, but in the beginning section explaining what happens to the rawmix as the temperature of the kiln rises, the chemical reactions given don't seem stoichiometric.

When dolomite decomposes, I would think the proper equation would be:

CaMg(C03)2) --> MgO + CaCO3 + CO2 or

CaMg(C03)2) --> MgO + CaO + 2CO2       (I don't know which is correct)

When limestone combines with silicate, I would think the equation would be:

2CaCO3 + SiO2 --> Ca2SiO4 + 2C02 When limestone decomposes into calcium oxide, the equation should be:

CaCO3 --> CaO + C02

The stoichiometry is important because it shows where the carbon dioxide comes from. As mentioned in the article, cement manufacture is a major source of carbon dioxide emissions: 60% of total emissions comes from the limestone calcification process.

I didn't want to make these changes myself, because I am not an expert in these matters. Others more knowledgeable than me should make the edits.

Mhklein (talk) 20:21, 13 March 2008 (UTC)

Coal used
Here in Brazil cement industry uses sub-bituminous coal in cement production, without any problem.Agre22 (talk) 16:42, 9 January 2010 (UTC)agre22

Original Research
Substantial parts of this article were written by me. I am a well known researcher in this field. I hereby assert that all those parts of the article that were written by me and are not provided with references are the results of my own original research. Wikipedia rules state that information that is the result of original research is prohibited, and where such information is unambiguously present in an article, it is the duty of every editor to remove it forthwith. LinguisticDemographer (talk) 22:40, 15 April 2010 (UTC)

A similar wiki on the history of the industry
There is a substantial wiki on the History of the UK industry, that has been used once here for a reference. At least this could be used to provide alternative references to the ones referred to above. --ClemRutter (talk) 09:22, 3 April 2018 (UTC)