China Nonferrous Metallurgy

Fuel consumption is an important factor affecting energy conservation and emission reduction of OBASKs. To promote the energy efficiency of OBASK and reduce carbon emission, targeting at the fuel type, this paper replaced the original blast furnace gas with calcium carbide gas of higher calorific value and analyzed the numerical differences in the energy efficiency of OBASK, fuel cost, and CO₂ emission based on METSIM. The results indicate that when the calcium carbide gas is adopted to replace blast furnace gas, there is an increase of 4.77% in energy efficiency of OBASK, a sharp decrease (only 30% of the original) in fuel consumption, and a decrease of 325.01 kg in CO₂ emission for per ton of lime production. Therefore, calcium carbide gas is recommended as the fuel of OBASKs to boost economic interest and environmental benefits in addition to realizing effective utilization of industrial by-products.