Commitment to a Low-Carbon Society
The Japanese cement industry is continuously challenging an improvement of the energy efficiency by developing “Commitment to a Low Carbon Society; Keidanren (the Japan Business Federation)”.
The target of this plan is to reduce a specific overall energy consumption of cement production* by 39 MJ/ton-cem. in FY 2020, furthermore 355 MJ/ton-cem. in FY 2030 from the FY 2010 level.
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(*) | “Specific overall energy consumption of cement production measured for the fiscal assessment year” is slightly compensated by taking into account of fluctuations of “cement production volume” and “cement/clinker ratio” from the base year (FY2010) levels as “specific overall energy consumption of cement production”.
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Definition of “Energy consumption for cement production”
** The thermal energy by combustion of biomass and combustible waste is not included.
This rule is applied in all industry participated in the voluntary action plan on the environment of Keidanren.
Figure 7 shows the specific energy consumption for cement production.
Figure 7 The specific energy consumption for cement production
The energy consumption for cement production does not include the thermal energy by combustion of biomass and combustible waste.
The reason why this rule is applied is considered as follows.
When the combustible wastes are incinerated by incinerators without using generated thermal energy, the generated thermal energy is only emitted to the atmosphere.
On the other hand, if combustible wastes are used as alternative thermal energy in industries, the generated thermal energy is used effectively. This leads to the preservation of natural resources.
Cement industry uses effectively wastes as alternative thermal energy as same as other industries. In addition, cement industry is able to use the incombustible part of wastes as a part of raw materials. This becomes the good point of the use of combustible wastes in the cement industry.
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