admin
1156 posts
TimePosted 22/08/2006 10:21:07
admin says

Re: Cement chemistry

The process of adding air-cooled slag to the kiln inlet has been patented by TXI under the name Cemstar. The minerals in the slag do not convert back to the free state. They are already intermediate states in the formation of Portland cement clinker and all that is required is the completion of exothermic combination to C3S. No additional heat is required, also there are no reported changes in the colour of the cement subsequently made from the clinker.

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admin
1156 posts
TimePosted 22/08/2006 10:21:07
admin says

Cement chemistry Question 14

What kind of changes are required in raw mix to increase the granulation with 50 per cent pet coke total CV 4.3 per cent, LSF 93, SM-2.1 per cent, AM-1.0 per cent, in kiln feed?

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admin
1156 posts
TimePosted 22/08/2006 10:21:07
admin says

Re: Cement chemistry

The granulation problems with pet coke firing arise because of the low viscosity of the flux caused by the sulphur in the pet coke. Therefore raising the silica and alumina modulii should help to improve the granulation.

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admin
1156 posts
TimePosted 22/08/2006 10:21:07
admin says

Cement chemistry Question 1

What is lime used for in cement ? Many people tell me different answers. What is the ratio of lime to cement and when to use in a particular job ?

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