537 posts
re Impact of ALKALY, SULPHURE and CHLORINE in Kiln operation and clinker quality ?
Hello BR,
Yes, you can calculate the alkali/SO3 ratio for clinker as well. However the clinker alkali/SO3 ratio is not greatly useful, except to confirm the alkali/SO3 balance of the inputs.
It is much more useful to check the alkali/SO3 ratio of the total inputs ( raw materials + fuel + AFRs), and hotmeal. The alkali/SO3 ratios of these two streams have totally different functions;-
1. The alkali/SO3 ratio of the total inputs shows if there is an excess of either SO3 or alkalis entering the system and is used to assess and select raw materials, fuels and AFRs, as well as monitor changes in alkali and sulphur levels in existing raw materials and fuels.
2. The alkali/SO3 ratio of the hotmeal should be monitored regularly (ideally every 2 to 4 hours). It will tell you if there has been a significant change in the degree of sulphur recirculation due to reducing conditions.
Regards,
Ted.
Know the answer to this question? Join the community and register for a free guest account to post a reply.
537 posts
re Impact of ALKALY, SULPHURE and CHLORINE in Kiln operation and clinker quality ?
Hello Ahmed,
Is this an increase from 0.22 to 0.28% chloride in the raw materials or the hot meal?
Regards,
Ted.
31 posts
re Impact of ALKALY, SULPHURE and CHLORINE in Kiln operation and clinker quality ?
In kiln feed it is increased from 0.22 to 0.28 %, keeping other alkalis K2O and Na2O, same 0.4 and 0.35 respectively, this increase of Cl in kiln feed is from PH O/L dust which contains 0.6 % Cl, and
Limestone contains 0.28 % and Clay contains 1 % Cl respectively, here L/S % in weigh feeder is
90 % and Clay is 4 % .this is few data regarding our quality, if u require further I can mail u .
Thanku
537 posts
re Impact of ALKALY, SULPHURE and CHLORINE in Kiln operation and clinker quality ?
Hello Ahmed,
Firstly let me say that even 0.22% Cl- in the rawmix is already a VERY high input of chloride. I understand from some of your other posts that this high level of chloride in the raw materials has forced you to install a kiln bypass.
An increase of 0.22 to 0.28 represents almost a 30% increase in chloride, which is significant. However, whether or not this increase may cause you problems will depend on how the kiln bypass handles this increase.
You have a molar excess of alkalis with respect to chloride, even at 0.28%, so I would expect that you should still be able maintain your hotmeal chloride at 0.6%, although it may require an increase in bypass dust extraction rate.
Has the raw meal chloride level increased already or are you anticipating an increase in the future?
Regards,
Ted.