Code for design of blast furnace ironmaking plant English
1 General Provisions
1.0.1 This Code is formulated with a view to improving the blast furnace ironmaking engineering level and quality and achieving the construction with advanced technology in economical and reasonable way, and efficient energy utilization, safe and practical application, and friendly to environment.
1.0.2 This Code is applicable to the Greenfield/new and Brownfield/upgrading engineering of blast furnace ironmaking projects.
1.0.3 The new blast furnace shall be designed with an effective volume of1200m3and beyond.The new blast furnace at deep water port of coastland shall be designed with an effective volume beyond3000m3.
1.0.4 The blast furnace ironmaking engineering shall comply with not only this Code, but also the requirements specified in the relevant national standards in force.
2 Terms and Symbols
2.0.1
effective volume of blast furnace (m3)
the volume contained in the space of effective height of the blast furnace.
2.0.2
effective height of blast furnace (m)
the vertical distance from the blast furnace s zero stock line to centerline of taphole.
2.0.3
hearth diameter (m)
the diameter of hearth formed inside the tuyere assembly.
2.0.4
utilization coefficient of blast furnace/productivity coefficient/productivity (t/m3·d)
the ratio of blast furnace s daily output to its effective volume.
2.0.5
hearth area utilization coefficient of blast furnace (t/m2·d)
the ratio of blast furnace s daily output to hearth sectional area.
2.0.6
bosh gas volume (m3)
total volume of gas generated by bosh, consisting of the gas volumes from blasting, oxygen enrichment, pulverized coal injection and blast moisture.
2.0.7
bosh gas volume index (m/min)
the ratio of bosh gas volume to hearth sectional area.
2.0.8
operation rate (%)
the percentage of actual operation time of blast furnace accounting for calendar time.
2.0.9
coke ratio/rate (kg/t)
the dry coke quantity as consumed by blast furnace for smelting of per ton hot metal, also named as charging coke ratio.
2.0.10
coal ratio/rate (kg/t)
the coal powder quantity as consumed by blast furnace for smelting of per ton hot metal.
2.0.11
coke nut ratio/rate (kg/t)
the dry coke nut quantity as consumed by blast furnace for smelting of per ton hot metal.
2.0.12
fuel ratio/rate (kg/t)
the total quantity of coke, coal powder (not considering coal-to-coke replacement ratio)and coke nut as consumed by blast furnace for smelting of per ton hot metal.
2.0.13
energy consumption per ton hot metal (kgce/t)
the total quantity of various energies, including fuels and power used for working procedures, as consumed by blast furnace for smelting of per ton hot metal, equal to the difference of consumed energies volume deducting the recovered energies volume and then divided by the hot metal output.
2.0.14
oxygen enrichment ratio (%)
the volume percentage of increased content of oxygen in the enriched blast.
2.0.15
one ladle transportation
the technological process of receiving the hot metal from blast furnace smelting directly by the ladle at steelmaking workshop and transporting it in the same ladle to converter at steelmaking workshop.
2.0.16
equipment maximal capacity
the maximal capacity of equipment as required for ensuring its safe operation.
3 Basic Requirements
3.0.1 The blast furnace ironmaking engineering shall be based on the beneficiated material and apply the technologies of pulverized coal injection, high blast temperature, high pressure and oxygen enrichment in pursuit of ironmaking technology featuring high efficiency, low consumption, prime quality, long campaign and environmental friendliness.
3.0.2 The volume of blast furnace should be graded as1000m3, 2000m3, 3000m3, 4000m3and5000m3, each of which specifies a certain range of effective volume ofthe blast furnace.
3.0.3 The blast furnace ironmaking engineering shall consider the proper feedstock and fuel quality and supply conditions in accordance with this Code.
3.0.4 The blast furnace shall be designed in rather large volume；the new blast furnace plant should hold two or three blast furnaces at its best.
3.0.5 The blast furnace ironmaking engineering shall be decided by making comparisons between and among different technical and economic proposals taking into account the national conditions and plant status.
3.0.6 The blast furnace ironmaking engineering shall consider the by-product and energy recovery facilities as well as facilities for energy-efficiency, consumption reduction and environmental protection.
