GB/T 37504-2019Guides for energy efficiency assessment of continuous casting process (English PDF)

6.1 Process boundary division

The boundary of the continuous casting process starts from the input of molten steel into the pouring position and the input of energy and energy-consuming working fluid. End with qualified billet shipped out of the continuous casting workshop.

See Annex A for boundary division of continuous casting process.

6.2 Energy consumption statistics range

The energy consumption statistics range of continuous casting process is as follows:

a) Continuous casting production, including continuous casting machine, water treatment system, refractory product baking system and dust removal system;

b) Include machine repair, inspection, testing, metering, transportation, production management and scheduling systems, heating or cooling, lighting, storage and other auxiliary production systems;

c) Include the amount of energy lost at the interface of the continuous casting process.

The above statistical scope of energy consumption does not include the energy consumption of facilities (such as canteens, lounges) that are not related to production and are used for living purposes.

7.1 Baseline conditions

7.1.1

Baseline conditions are a number of measurable factors that have a large impact on baseline energy consumption, including objective and subjective factors.

7.1.2

Objective factors are the factors that are affected by inherent conditions outside the process boundary and cannot be controlled within the process, mainly referring to raw material conditions, product conditions, geographical environment, climatic temperature.

7.1.3

Subjective factors are the factors that are related to the enterprise's own management level, technical equipment level, and operation level, that can be […]

8.1 Data collection

Field data collection includes but is not limited to the followings. The process parameters shall take data under stable production conditions. The change shall be the average value of the statistical reporting period:

a) Yield information, including production scale, qualified product quantity during statistical reporting period;

b) Raw material conditions, including steel type, molten steel composition and temperature;

c) Product conditions, including cast blank quality and blank sending temperature;

d) Energy and consumption of working fluid, such as circulating water, electricity, compressed air, oxygen, nitrogen, argon, gas;

e) Main energy-consuming units and important energy-consuming equipment parameters, such as the main parameters of continuous casting machine, water treatment system, refractory product baking system, dust removal system;

f) Ambient temperature.

8.2

Principles for calculating the value of standard coal coefficient for energy and energy-consuming working fluid

8.2.1

The fuel energy that is actually consumed by energy-consuming units shall be converted into standard coal based on its low calorific value. Refer to

Table B.1 in Annex B for the unmeasured.

8.2.2

Refer to Table B.2 for conversion of energy-consuming working liquid to standard coal.

8.2.3

The conversion relationship between standard coal and heat is 1kgce =

29307.6kJ.

8.2.4

Take the equivalent value of the standard coal coefficient for power conversion, that is, 1kWh = 0.1229kgce.

8.3 Calculation of actual energy consumption

The actual energy consumption is calculated according to formula (3):

10.2

Equipment and monitoring analysis of energy measurement

equipment

Energy metering equipment and monitoring analysis shall include but not limited to the following:

a) According to the requirements of GB 17167 and GB/T 21368, analyze the scientificity and rationality of the equipment measurement scheme of the continuous casting process;

b) Energy utilization status of continuous casting process can be monitored by referring to GB/T 15316.

10.3 Energy efficiency level analysis

The energy efficiency level analysis shall include but not limited to the following:

a) Energy efficiency analysis of continuous casting process;

b) For energy efficiency analysis of important equipment, refer to GB 18613,

GB 30254, GB 19761, GB 19762;

c) Energy unit consumption analysis;

d) For energy management analysis, refer to GB/T 30258;

e) For rationality analysis of power utilization, refer to GB/T 3485;

f) For rationality analysis of heat energy utilization, refer to GB/T 3486;

g) For energy saving potential analysis and energy system optimization, refer to GB/T 30715.