2　Terms

2.0.1　Raw materials

Iron-bearing materials for sinter production，such as iron ore fines，iron ore concentrates and other iron-bearing materials.

2.0.2　Fluxes

The alkaline substances such as limestone，dolomite，serpentine，quicklime，hydrated lime，lightlyburned dolomite fines and magnesite etc.and silicon-adding fluxes like silica sand.

2.0.3　Fuels

A general term for coke fines，anthracite and gas.The coke fines and anthracite are also called solid fuels.

2.0.4　Blending yard

It is where the raw materials are pre-proportioned，stacked，blended and stored.

2.0.5　Blended ores

The raw materials with different physicochemical properties are pre-proportioned，stacked and blended into raw materials with uniform physicochemical properties.

2.0.6　Sintering

It is a process in which the iron-bearing raw materials，fluxes and solid fuels are mixed in required proportion and granulated with addition of water，and then the raw mix is distributed on the pallet car of sinter machine and sintered into agglomerates through ignition，exhausting and sintering.

2.0.7　Sintering machine productivity

Sintering machine productivity is the output of product sinter per hour based on specific sintering area，and expressed as the t/（m2·h）.

2.0.8　Automatic weight proportioning

The required iron-bearing materials，fluxes and the solid fuels are proportioned by weight and their feed rate is adjusted automatically.

2.0.9　Divided fuel addition

Solid fuels are respectively added into mixtures in the proportioning room and after granulating.

2.0.10　Mixture

It refers to the product produced after the iron-bearing materials，fluxes，solid fuels and added water are mixed up and nodulized.

2.0.11　Hearth layer

The bottom material put on the pallet car of sintering machine before the mixture is fed to the pallet car.

2.0.12　Bed depth

During production，the bed depth is the sum of the mixture depth and the hearth layer depth on the pallet car of sinter machine.

2.0.13　Bed permeability

In view of the mixture placed on the sinter machine，under the condition of certain bed depth and negative pressure，the bed permeability means the throughput of air volume per minute in specific sintering area.

2.0.14　Mini-pellet sintering

A method for making the mixture into balls of size over 3mm which account for more than 75% and sintering them.

2.0.15　Low temperature sintering

A sintering method based on the low temperature（less than 1280℃）for producing the major binder phase of acicular（needle-like）calcium ferrite with high strength and good reducibility.

2.0.16　Hot air sintering

The hot waste gas from the cooler is introduced into the sealing hood of sinter machine at the back of ignition and after-heating furnace for sintering.

2.0.17　Sinter cake

It is the material formed after the sintering is finished.

2.0.18　Hot return fines

Hot return fines are screen undersize smaller than 5mm after the sinter cake crushing and screening.

2.0.19　Off-strand cooling

Cooling on the cooler outside the sinter machine after sinter cake crushing.

2.0.20　On-strand cooling

Sinter cake cooling on the sinter machine.

2.0.21　Sinter sizing

After cooling，the sinter is screened and sized，where the sinter product with particle size of BF requirements，the hearth layer for sintering and return fines are classified.

2.0.22　Cold return fines

Return fines separated out after sinter cooling，screening and sizing with particle size smaller than 5mm.

2.0.23　High basicity sinter

The sinter with basicity（CaO/SiO2）higher than 1.7.

2.0.24　Burden structure

Structure of iron-bearing burden loading in blast furnace for iron-making，i.e.the mixture of lump ore，sinter ore and pellets etc.and their mixing ratios.

2.0.25　Main electrical building

The building where power transformation and distribution equipment and automatic control system installed.

2.0.26　Main control room

The room for centralized operation，monitoring，production management，commanding and controlling of production process and equipment.

2.0.27　Waste heat recovery

The process for recycling the heat from hot waste gas and other heat sources during sintering and cooling processes.

2.0.28　Sintering process of flue gas recirculation

The sintering process for distributing a part of hot flue gas produced during the sintering production process back to the top of sintering bed.