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STEC and SEEC Evolution
STEC Evolution
0
1000
2000
3000
4000
5000
6000
Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec
STEC Evolution
2022 2021 Reference Value
Year 2021 Year 2022
June to Sept
• Kiln MTBF dropped (lowest 19hrs) due to
refractory failure (7m and 29 m mark)
• Preheater stage 4 dip tube failures
• Firing fans repairs
• Overburnt clinker due to XRF breakdown
• Kiln warm ups due to power fialures
• High kiln false air 13% (inlet seal and kiln
door not sealing )
Apr to Jul
• High kiln feed sd max 11 due to XRF
breakdown and low raw mix stocks
• Kiln cold start ups after CBZ refractory
failure (3 times)
• Poor kiln stability due chemistry
variation and use of rummaged coal
(low coal stocks)
3
SEEC Evolution
0.00
20.00
40.00
60.00
80.00
100.00
120.00
140.00
160.00
180.00
200.00
Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec
SEEC
kwh/t
cem
Month
SEEC Evolution
2022 2021 Reference Value
Year 2021 Year 2022
June to Aug
• Ball mills output dropped to 79% due to
delayed media regrading
• CBZ refractory failures (3 incidents) low
raw meal stocks and kf sd
• Idle power consumption increased due to
precip fan running to ventilate the kiln
during refractory stoppages
• High kiln feed sd max 11 due to XRF down
• Low kiln PRI 69% caused by low coal
stocks
• Idle power consumption due to
running of ID fan and precip fan
during the refractory works and dip
tube repairs
• CM1 and CM2 PRI dropped to 83%
due to hard to grind clinker

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STEC and SEEC evolution.pptx

  • 1. STEC and SEEC Evolution
  • 2. STEC Evolution 0 1000 2000 3000 4000 5000 6000 Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec STEC Evolution 2022 2021 Reference Value Year 2021 Year 2022 June to Sept • Kiln MTBF dropped (lowest 19hrs) due to refractory failure (7m and 29 m mark) • Preheater stage 4 dip tube failures • Firing fans repairs • Overburnt clinker due to XRF breakdown • Kiln warm ups due to power fialures • High kiln false air 13% (inlet seal and kiln door not sealing ) Apr to Jul • High kiln feed sd max 11 due to XRF breakdown and low raw mix stocks • Kiln cold start ups after CBZ refractory failure (3 times) • Poor kiln stability due chemistry variation and use of rummaged coal (low coal stocks)
  • 3. 3 SEEC Evolution 0.00 20.00 40.00 60.00 80.00 100.00 120.00 140.00 160.00 180.00 200.00 Jan Feb Mar Apr May June Jul Aug Sep Oct Nov Dec SEEC kwh/t cem Month SEEC Evolution 2022 2021 Reference Value Year 2021 Year 2022 June to Aug • Ball mills output dropped to 79% due to delayed media regrading • CBZ refractory failures (3 incidents) low raw meal stocks and kf sd • Idle power consumption increased due to precip fan running to ventilate the kiln during refractory stoppages • High kiln feed sd max 11 due to XRF down • Low kiln PRI 69% caused by low coal stocks • Idle power consumption due to running of ID fan and precip fan during the refractory works and dip tube repairs • CM1 and CM2 PRI dropped to 83% due to hard to grind clinker