Profitability calculation in rotary kiln refractory demolition

Refractory demolition in rotary kiln such as cement kiln could be an easy Return of Investment.

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Conditions

(A) Demolition of kiln section coating and lining (meter)
(B) Diameter of the kiln (meter)
(C) Daily production (tonne)

Time savings

(D) Time for demolition of coating and lining using current method (day)
(E) Time for demolition of coating and lining using demolition robot (D ÷ 4)
(F) Saved downtime (D – E)
(G) Number of downtime per year
(H) Total saved downtime per year (F x G)

Result and profit per year

(I) Production increase (H x C)
(J) Net profit per tonne of cement
(K) Profit per year (I x J)

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Examples

(A) Demolition of kiln section coating and lining = 20 meter
(B) Diameter of the kiln = 5.0 meter
(C) Daily production = 5,000 tonne
(D) Time for demolition of coating and lining using current method = 4 days
(E) Time for demolition of coating and lining using demolition robot = 1 day
(F) Saved downtime = 3 days
(G) Number of downtime per year = 2 periods
(H) Total saved downtime per year = 6 days
(I) Production increase = 30,000 tonnes
(J) Net profit per tonne of cement = USD 10
(K) Profit per year = USD 300,000