Code for design of iron pellet engineering English
1 General Provisions
1.0.1 This code is formulated with a view to better implement the national industrial policies and general principles of advanced and economic, minimized energy consumption and emission, safety and environment protection during the design of iron ore pellet plants.
1.0.2 This code is applicable to the iron ore pellet plants either construction, expansion or renovation.
1.0.3 Not only the requirements stipulated in this code, but also those in the current relevant ones of the nation shall be complied with.
2 Terms
2.0.1
raw Materials
iron-bearing materials for pellet pro duction, such as iron ore fines, iron ore concentrates and the likes.
2.0.2
auxiliary materials
materials which are auxiliary but indeed needed to be added into pellets for the specific functions and/or satisfying the quality requirements of pellet products.
2.0.3
binder
materials added into pellets to improve the balling performance of iron ores, such as bentonite, quicklime, hydrated lime and other kinds of organic matter.It is typically identified as organic binders and inorganic binders.
2.0.4
additive
materials containing calcium, magnesium and boron etc., added into pellets to meet the different quality requirements of pellet products. Compound additive is a mixture of binder with various additives used as an auxiliary material for production of iron ore pellets.
2.0.5
fuel
fuel is a substance such as natural gas, blast-furnace gas, coke oven gas, heavy oil and coal etc.that is burned to provide heat for pellets induration.Fuel solid, fuel liquid and fuel gas are three kinds of major classifications.
2.0.6
carbon source
materials containing fixed carbon added into pellets for heat supply interiorly, such as anthracite, coke and petroleum coke etc.
2.0.7
stockyard
the facility for stockpiling and storing of raw materials, fuels, additives, and pellet products.Mainly comprising raw materials stockyard and pellet stockyard.
2.0.8
grinding
procedure in which material is ground to obtain desired fineness and/or specific surface area to meet the process requirements, including dry grinding, wet grinding, moist grinding and high-pressure roll press grinding.
2.0.9
iron ores drying
a system or procedure in which excessive moistures are evaporated to desired levels from iron ores by convective heat transfer from gases to solids.
2.0.10
automatic weight proportioning
a procedure for control the materials mass flow at predetermined rates automatically.
2.0.11
mixture
blended materials from raw materials with auxiliary materials.
2.0.12
balling
a procedure of processing and obtaining green balls from mixture in balling machine.
2.0.13
green ball
the balls made from mixture in balling machine which are not subject to drying, preheating and indurating.
2.0.14
green ball classification
procedure in which undersize and oversize green balls are separated from green balls.
2.0.15
induration
a procedure or system in which preheated pellets are heat-harden allowing sufficient oxidation, recrystallization and crystal growth.
2.0.16
pelletizing
process of pellet production in the sequence of materials proportioning ＆ mixing, balling, green balls classification, drying and preheating, indurating and cooling.
2.0.17
pellets
the final products from pelletizing process.
2.0.18
hearth and side layer
pellets with certain thickness lined on the grate plates and the inner sides of sideplates in straight grate indurating machine.
2.0.19
bed depth
the level of pellets bed on induration machine.
2.0.20
bed permeability
the capacity of air flow across through the pellets bed under certain bed level and pressure.
2.0.21
straight grate productivity
the throughputs of final products of straight grate indurating machine calculated on unit effective grate area per day, t/m2/d.
2.0.22
traveling grate productivity
the throughputs of final products of traveling grate calculated on unit effective grate area per day, t/m2/d.
2.0.23
kiln productivity
the throughputs of final products of the kiln calculated on unit net volume per day, t/m3/d.
2.0.24
shaft furnace productivity
the throughputs of final products of the shaft furnace calculated on unit effective furnace cross section area per day, t/m2/d.
2.0.25
pyro-process system
the heat supply and heat transfer systems for pelletizing process.
2.0.26
firing regime
parameters applied for process zones of induration system based on the given raw material characteristics, including solid and gas temperatures, residence time, gas velocity and flowrates, heat supply rates etc.
2.0.27
green balls drying
a procedure in which green ball moistures are evaporated by convective gas-solid heat transfer.
2.0.28
downdraft drying (DDD)
the green balls drying is processed by a downward air flow across the pellets bed.
2.0.29
updraft drying (UDD)
the green balls drying is processed by an upward air flow across the pellets bed.
Standard
GB 50491-2009 Code for design of iron pellet engineering (English Version)
Code for design of iron pellet engineering English
1 General Provisions
1.0.1 This code is formulated with a view to better implement the national industrial policies and general principles of advanced and economic, minimized energy consumption and emission, safety and environment protection during the design of iron ore pellet plants.
1.0.2 This code is applicable to the iron ore pellet plants either construction, expansion or renovation.
1.0.3 Not only the requirements stipulated in this code, but also those in the current relevant ones of the nation shall be complied with.
2 Terms
2.0.1
raw Materials
iron-bearing materials for pellet pro duction, such as iron ore fines, iron ore concentrates and the likes.
2.0.2
auxiliary materials
materials which are auxiliary but indeed needed to be added into pellets for the specific functions and/or satisfying the quality requirements of pellet products.
2.0.3
binder
materials added into pellets to improve the balling performance of iron ores, such as bentonite, quicklime, hydrated lime and other kinds of organic matter.It is typically identified as organic binders and inorganic binders.
2.0.4
additive
materials containing calcium, magnesium and boron etc., added into pellets to meet the different quality requirements of pellet products. Compound additive is a mixture of binder with various additives used as an auxiliary material for production of iron ore pellets.
2.0.5
fuel
fuel is a substance such as natural gas, blast-furnace gas, coke oven gas, heavy oil and coal etc.that is burned to provide heat for pellets induration.Fuel solid, fuel liquid and fuel gas are three kinds of major classifications.
2.0.6
carbon source
materials containing fixed carbon added into pellets for heat supply interiorly, such as anthracite, coke and petroleum coke etc.
2.0.7
stockyard
the facility for stockpiling and storing of raw materials, fuels, additives, and pellet products.Mainly comprising raw materials stockyard and pellet stockyard.
2.0.8
grinding
procedure in which material is ground to obtain desired fineness and/or specific surface area to meet the process requirements, including dry grinding, wet grinding, moist grinding and high-pressure roll press grinding.
2.0.9
iron ores drying
a system or procedure in which excessive moistures are evaporated to desired levels from iron ores by convective heat transfer from gases to solids.
2.0.10
automatic weight proportioning
a procedure for control the materials mass flow at predetermined rates automatically.
2.0.11
mixture
blended materials from raw materials with auxiliary materials.
2.0.12
balling
a procedure of processing and obtaining green balls from mixture in balling machine.
2.0.13
green ball
the balls made from mixture in balling machine which are not subject to drying, preheating and indurating.
2.0.14
green ball classification
procedure in which undersize and oversize green balls are separated from green balls.
2.0.15
induration
a procedure or system in which preheated pellets are heat-harden allowing sufficient oxidation, recrystallization and crystal growth.
2.0.16
pelletizing
process of pellet production in the sequence of materials proportioning ＆ mixing, balling, green balls classification, drying and preheating, indurating and cooling.
2.0.17
pellets
the final products from pelletizing process.
2.0.18
hearth and side layer
pellets with certain thickness lined on the grate plates and the inner sides of sideplates in straight grate indurating machine.
2.0.19
bed depth
the level of pellets bed on induration machine.
2.0.20
bed permeability
the capacity of air flow across through the pellets bed under certain bed level and pressure.
2.0.21
straight grate productivity
the throughputs of final products of straight grate indurating machine calculated on unit effective grate area per day, t/m2/d.
2.0.22
traveling grate productivity
the throughputs of final products of traveling grate calculated on unit effective grate area per day, t/m2/d.
2.0.23
kiln productivity
the throughputs of final products of the kiln calculated on unit net volume per day, t/m3/d.
2.0.24
shaft furnace productivity
the throughputs of final products of the shaft furnace calculated on unit effective furnace cross section area per day, t/m2/d.
2.0.25
pyro-process system
the heat supply and heat transfer systems for pelletizing process.
2.0.26
firing regime
parameters applied for process zones of induration system based on the given raw material characteristics, including solid and gas temperatures, residence time, gas velocity and flowrates, heat supply rates etc.
2.0.27
green balls drying
a procedure in which green ball moistures are evaporated by convective gas-solid heat transfer.
2.0.28
downdraft drying (DDD)
the green balls drying is processed by a downward air flow across the pellets bed.
2.0.29
updraft drying (UDD)
the green balls drying is processed by an upward air flow across the pellets bed.
