2　Terms

2.0.1　Thermal load of furnace

It is the heat generated by the fuel or electricity in the furnace per unit time，the unit is kW.

2.0.2　Reference billet/slab

The billet/slab used for either cold commissioning or hot commissioning to assess furnace performance；steel grade，size and other specifications are to be stipulated in the agreement（or contract）entered into by and between the seller and the buyer.

2.0.3　Nominal production

Reference billet/slab is charged to furnaces according to prescribed conditions，and heated to achieve the required discharging conditions，and then be fed to mill for continuous production for 6 hours.Nominal production is average of 4h continuous maximum production，the unit is t/h.

2.0.4　Nominal specific consumption

It is the chemical energy of fuel charged to reheating furnace or the electrical energy for the electric resistance furnace under the nominal production，the unit is GJ/t.

2.0.5　Thermal efficiency

It is the percentage of the energy billet/slab obtains from the energy supplied to industrial furnace.

2.0.6　Scale loss rate

It is the proportion of mass loss of billet/slab caused by oxidation during heating compared to the mass before heating.

2.0.7　Furnace hearth intensity

It is heating capacity of specific furnace hearth area above which billet travels in the furnace，the unit is GJ/t.

2.0.8　Skid hearth rate

It is the proportion of the total outer surface area of the water cooling parts supporting the slabs in furnace as compared to furnace hearth area.

2.0.9　Nominal state

It is the gas state when the temperature is 273.15K，and the pressure is 101.325kPa.