SEMI-BATCH INDUSTRIAL SIZE VERTICAL SHAFT LIME KILN DESIGN

Dr Otoikhian Kevin Shegun and 1S. I. Bello, 2A. S. Ahmed   (Published 2019)

Dr Kevin Shegun
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Abstract

The work embraced a modified design, construction and test running of an industrial size vertical shaft lime kiln. The lime kiln was 3.0 m tall with internal diameter of 0.6 m. It was designed for a maximum charging of 1.5 tonnes of limestone, while about 250 kg of lime was to be discharged every three hours. This offered the system a semi-batch process. The stability and integrity of the plant installation was good based on the thermal insulation. A calcination temperature of about 1200 ? as required to calcine Jakura limestone in the kiln, and there was adequate thermal insulation to maintain low outer wall temperature. The serious backfiring, that is usually encountered in the operations of locally fabricated vertical shaft lime kilns due to poor draft was minimized. More so, the high down time encountered during the charging and discharging of most local kilns was also minimized. The calcined lime was analysed and the available lime from the product was 86 wt%, while the pH raged from 11.0 to 12.5. The settling rate of the product lime in distilled water was low.


Item Type: Journal article(non-copyrighted)
Format: PDF document,   0.88 MB
Copyright: Creative Commons LicenseCreative Commons license
Keywords: Backfiring, calcination, Jakura, kiln, limestone, semi-batch
Department: Chemical Engineering
Field of Study: Engineering- Chemical
Uploaded By: Agbodekhe Barnabas Philip
Date Added: 08 Sep 2019 5:42pm
Last Modified: 08 Sep 2019
Journal URL: https://www.edouniversity.edu.ng/oer/journal/semi-batch_industrial_size_vertical_shaft_lime_kiln_design


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