Founded in 1970, Our mill is the first producer capable of manufacturing wide and heavy steel plate of most complete product mix, widest specification range, highest product quality, most extensive application scope in China with 13.2 billion yuan total assets and more than 10,000 employees. The 4200mm plate mill in Our mill is the earliest extra wide and heavy plate mill of China. Our mill has over 30 years' experience and accumulated technology on wide and heavy steel plate production, establishing its unique and important position in China's wide and heavy steel plate industry.
Our mill possesses one 4100m and one 4200mm wide and heavy steel plate mill lines, consisting of four UHP EAFs, one 120 t BOFs, eleven secondary refining and vacuum degassing units, nine massive ingot casting lines, one 300mmx1900mm slab continuous caster, two 300mmx2500mm slab continuous casters, one 4100mm twin stand plate mill and one 4200mm plate mill, with most complete steel plate heat treatment facilities , testing devices for scientific research and state level physical and chemical testing center.
Among products of 12 category series, more than 400 steel grades produced by Our mill, more than 200 steel grades have been produced as import substitutes or according to foreign standards, more than 30 steel grades have been exported to many developed countries and regions such as USA, Germany and Japan etc. Our mill is also the drafting unit of five national standards of steel plate for building structure, crude oil and natural gas transmission pipe line and through thickness properties steel plate. In Oct.of 2010, the company was awarded the top prize of China Quality Management- National Quality Prize.
Process Flow
Blast Furnace Smelting→EAF(BOF)Melting→LF and VD Secondary Refining→Continuous Casting(mould casting)→ESR→Controlled Rolling and Controlled Cooling→Heat Treatment→Finishing
1. Process Flow Chart
2. Heavy Plate Production Flow Route
Three extra heavy plate production and process routes
designed for different demands.
3. Capacity of Technological Installation
(1) Ingot,continuous cast slab and steel plate production line of domestic largest specification
Max.single piece weight of Ingot: 50T, max.single piece weight of plate:38T.
Application of dynamic soft reduction and EMC
Max.section size of slab: 330×2500mm
Product dimension:
thickness range : 6-650mm (700mm some up to 700mm)
width range: 1150-4020mm
length range: 3000-27000mm
(2) Complete Secondary Refining Devices
Seven 100 t LFs, five VDs and VODs
Secondary refining rate of molten steel:100%
Vacuum degassing rate:95%,high steel cleanliness
Low residual content:
P≤0.010% S≤0.003% N≤80ppm
O≤20ppm H≤2ppm
(3) Advanced Rolling Equipment and Control Technologies
(AGC) Hydraulic AGC
On-line Process Model Automatic Control
Hydraulic Bending and Work Roll Axial shifting function
Max.rolling load up to 86000 KN, a powerful rolling mill
Accurate accelerated cooling capacity with DQ function
4 Level Computer Control System
(4) Most Complete Heat Treatment Facilities for Extra Heavy Plate at Home
Ensure microstructure homogeneity, grain refinement and excellent properties of steel plate
Including Normalizing furnace, quenching furnace, offline furnace, car bottom furnace, tempering furnace, slow cooling pit
Quenching, tempering, normalizing and annealing functions
Annual Heat Treatment Capacity ≥1 million tons
Heat treatment size:
8-650mm Thickness
1200-4020mm Width
3000-18000mm Length
(5) Advanced Slab ESR Furnace of Max. Single Piece Weight at home
Our mill possesses 3 slab ESR furnaces, being the one with largest capacity and max.thickness slab, max.single piece weight of slab up to 50t , max.single piece weight of plate up to 38 t, max.thickness of ESR slab 960mm, providing ensurence to the assurance of large thickness Z direction steel plate and extra heavy steel plate.
UHP EAF
Two 100 t LFs and two 90t LFs, annual steel output :5 million tons.
100T VD
Three twin stand VDs with CCTV to monitor the entire degassing process of molten steel.
Large Slab Continuous Caster
Three large thickness slab continuous casters lines in total of 90t and 100t capacities respectively. The slab size is 200/250/300/330×1300-2500mm, The largest cross section is 330×2500mm. All the casters apply various techniques such as straight mould, automatic mould level control, small vibration magnitude, high frequency, EMS, soft reduction, multi-point bending, multi-point straightening.
Massive Ingot Casting Line
Twelve ingot casting lines:the flat ingot types include 11.4t,13.5(15.3)t,20(23)t,28(31)t,35 t,40 t,45 t,50 t; max.single piece weight of taper type ingot is 80 t,which can be rolled into finish plate of 60t single piece weight.
50t Slab ESR Furnace
Integrating the state of art process technologies of low frequency power supply, dual pole serial connection and elevated mould, various steel grade ESR ingot of three thickness including 640mm,760mm and 960mm have been successfully developed. The steel is clean and microstructure is homogenous and refined.
Soaking Pits
Sixteen soaking pits, max.charging weight of a single pit is 160t
Continuous Reheating Furnace
The slab yard of the new production line is adjacent to the continuous caster and directly receives incoming slabs from the caster via interconnecting roller table. Various operations including secondary flame cutting, surface scarfing, on-line weighing, width and length measuring of slabs can be performed in the slab yard.
4200mm Plate Mill
Max.rolling force: 4200t, thickness range of steel plate,max.width:4020mm Named as "the Merit Plate Mill" by China Iron and Steel Industry Association.
4100mm Plate Mill
Max. permissible rolling force:86000KN,rolling speed: 0/3.2~7.91m•s-1;mill opening : 400mm; thickness range of steel plate:6~150mm，width range: 1150 ~ 3700mm, length range:3000 ~ 18000mm,max.single piece weight of steel plate: 19.7t.
Vertical Edger
Max.rolling force: 5000KN,max.edging draft:50mm. Location: adjacent to the finishing mill stand; The edger is equipped with hydraulic AWC system functioning head and tail short stroke control to effectively improve the rectangularity of steel plate.
MULPIC Accelerated Cooling Device
Entire length of cooling zones:24300mm,cooling rate: max.40 ℃/s for 20mm thickness plate, max.and min. flow ratio: 20:1, functions: accelerated cooling + DQ
Normalizing Furnace
Five roller hearth normalizing furnace lines, plate thickness range:6~120mm, length range: 3-18m,functions: normalizing and tempering
Quenching Machine
The two quenching and tempering lines are all imported from German LOI. Old line: length of austenitizing furnace 36m, length of quenching machine 26m, thickness of quenching plate:8~100mm,length of quenching plate:4~16m; new line: length of austenitizing furnace 65m, length of quenching machine 23m, thickness of quenching plate:6～150mm,max.length of quenching plate:18m
Hydraulic Flattening Machine
The heat treatment line is equipped with a flattening machine of 50MN nominal capacity. The max. temperature of steel plate is 400℃. For a steel plate with initial average unflatness ranging from 0 to 20mm, the unflatness of steel plate after straightening can be ensured to be less than or equal to 2mm , which improves the flatness of steel plate.
Nine Roller Hot Leveler
The nine roller hot leveler adopts full hydraulic roll gap adjustment with max.leveling force 32000KN, calculates all parameters by model, implements accurate setups and controls, which is designed as odd pass leveling and even pass reversing.
Finishing Line
Mainly equipped with walking beam cooling beds of 4160m2(89m long×52m wide).The steel plate of thickness ＜80mm shall be transferred to turn-over device for surface inspection and grinding from cooling beds.The steel plate of thickness ＞ 80mm shall be transferred to thick plate handling zone from cooling beds.
The finishing line consists of automatic ultrasonic flaw detection device, crop shear, double side trimming shear, dividing shear, sample shear, marking machine, finished product size measuring gauge, cold leveler. The Rolling cut shear with automatic knife gap adjustment and automatic top and bottom blade removal functions designed by SVAI is equipped with laser aligning device and magnetic centering device.
One 11 roller cold leveler locates at the end of the finishing line with a leveling thickness range of 5-35mm and max. leveling force up to 27500KN. The servo hydraulic system allows rapid adjustment response at all leveling stages. A scale dedusting system is also designed to ensure the surface quality of leveled plate.
Flaw Detection Device of Steel Plate
Two sets of on-line flaw detection devices for the flaw detection of steel plate on the production line,s with advantages of high production efficiency, short detection cycle and high detection accuracy.
Product Mix
12 product category series and more than 300 steel grades can be supplied by Our mill.
(1) Boiler and pressure vessel steel plate
(2) Low alloy high strength steel plate
(3) Bridge structural steel plate
(4) High rise building structural steel plate
(5) Wear resistant steel plate
(6) Alloy structural steel plate
(7) Mould and Abrasion resistant steel plate
(8) Carbon structrual steel plate
(9) Shipbuilding and offshore oil platform steel plate
(10) Clad steel plate
(11) High strength and toughness steel plate
(12) Crude oil and natural gas transmission pipeline steel plate
1. Boiler and pressure vessel steel plate
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Boiler and pressure vessel plate |
q245r-Q370R, 18MnMoNbR, 13MnNiMoR, |
GB713 |
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07MnCrMoVR, 07MnNiCrMoVDR, 12MnniVR |
GB19189 |
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16MnDR, 09MnNiDR, 15MnNiDR |
GB3531 |
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SB410,SB450,SB480 |
JIS G3103 |
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SPV235, SPV315, SPV355, SPV410, SPV450, SPV490 |
JIS G3115 |
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SGV410,SGV450,SGV480 |
JIS G3118 |
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SBV1A,SBV1B,SBV2,SBV3 |
JIS G3119 |
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SEV245,SEV295,SEV345 |
JIS G3124 |
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HⅠ, HⅡ, 10CrMo910, 15Mo3, 13CrMo44, 19Mn6 |
DIN 17155 |
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CCS/410A, CCS/410B |
CCS |
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(S)A299M, (S)A515M Gr (60,65,70) |
(ASME)ASTM |
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(S)A204M(A,B,C) |
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(S)A387M Gr (5,11,12,22), (S)A537M(CL1,CL2) |
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(S)A533GrB, (S)A517MGr(B,F) |
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(S)A516M Gr (60,65,70), (S)A662M(A,B,C) |
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(S)A302MGr (A,B,C,D), (S)A737MGr (A,B,C) |
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(S)A738MGr (A,B,C), (S)A203(A,B,D,E,F) |
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(S)A285(A,B,C),(S)A841GrD |
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P235GH, P265GH, P295GH, P355GH, 16Mo3, 13CrMo4-5 |
EN10028-2/3 |
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10CrMo9-10, 11CrMo9-10 |
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P275(NH,NL1,NL2), P355(N, NH,NL1,NL2), |
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P460(NH, NL1,NL2) |
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A42, A52, A48 |
NF A36-205 |
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20MnHR, 16MnHR,20HR, 13MnNiMo5-4, BHW35,DIWA353 |
(Special technical specification) |
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16MnD5, 18MnD5, 08Ni3DR, 06Ni9DR, 20MnNiMo |
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20MnMoNi55, 20MnMoR |
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2.25Cr1Mo, 1Cr0.5Mo, 2.25Cr1Mo0.25V, 1.25Cr0.5MoSi, 1.25Cr0.5Mo |
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Cr-Mo steel under hydrogen condition |
2. Quenched and tempered type high strength steel plate
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Quenched and tempered type |
Q460(C,D,E)-Q960(C,D,E) |
GB/T16270 |
3. Bridge structural steel plate
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Bridge structural steel p late |
Q235q-Q690q(C,D,E) |
GB/T714 |
4. Building structural steel plate
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Building structural steel plate |
Q235GJ(B,C,D,E),Q345GJ(B,C,D,E),Q390GJ(C,D,E), |
GB/T19879 |
5. Mould and Abrasion resistant steel plate
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Mould steel plate |
S45C-S55C |
JIS G4051 |
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Wear resistant steel plate |
NM300, NM360, NM400, NM450, NM500 |
GB/T24186 |
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WNM320-WNM500 |
(Special technical specification) |
6. Crude oil and natural gas transmission steel plate
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Crude oil and natural gas |
L245-L555 |
GB/T21237 |
Typical References
Building structural steel plate
110mm thickness Q460E/Z35 plate developed for national stadium Bird Nest of Beijing Olympic Games is the first creation world-wide for the same application.
Hydrogenation of Cr-Mo steel plate
The developed Cr-Mo plate under hydrogen environment have been applied for various oil refining facilities of petrochemical industry including Jiujiang Petrochemical Plant,Changling Petrochemical Plant and coal to oil projects including Ningmei and Luan.
Cr-Mo plate under hydrogen environment over 100mm thickness are solely supplied by Our mill at home, with a market share over 85%.
Nuclear Island Class Steel Plate
The developed 16MND5, 18MND5, SA533 steel plate of nuclear island class according to French and American Quality Assurance System with max.thickness 178mm, max.single piece 37t stand on the top at home, and have been applied for various nuclear power plant projects at home.
Heavy Plant Steel Plate
390mm thickness 20MnNiMo steel plate developed for 80,000 t die forging press as key equipment of Large Aeroplane Project is used to substitute imports.
High strength steel plate
Our mill developed quenched and tempered type wear resistant steel WNM500A has been applied to manufacture the high end state of art grinding plant- φ7.93×13.6m overflow type ball mill.
Giant Lanjing 7500t Offshore Crane manufactured by Shanghai Zhenhua Heavy Industry Co.Ltd.
Bridge Structural Steel Plate
Shanghai Lupu Bridge: 18000t steel plate used to fabricate the arched girder are supplied by Our mill.
Zhengzhou Huanghe Highway and Railway Bridge: 45 000t steel plate used to build the world longest highway and railway bridge are supplied by Our mill.
Runyang Yangtze River Bridge: 12000t steel plate used to build the cable-suspension highway bridge with 1490m long main span are supplied by Our mill.
53000t steel plate used to build San Francisco New Bay Bridge – the landmark building in west coast area of USA are supplied by Our mill.
Hydropower steel plate
The developed 300mm thickness steel plate with Z-direction properties for hydropower plant have been certified by the State Council Three Gorges Project Construction Committee that all the properties are equivalent to those of foreign products and can be used for manufacture of 700 MW class large water turbo generator units.
Our mill is the only enterprise capable of producing steel plate of such thickness at home.
Offshore engineering steel plate
The developed 152.4mm~215mm thickness gear rack steel plate for deep sea offshore platform have passed the certification from ABS, DNV and GL as substitute of imports, forcing the import price declined by nearly 50%. The 215mm thickness plate for manufacturing gear rack of deep sea offshore shore platform is the only one passed the certification of classification societies at home
Pipeline Steel Plate
Our mill's pipeline steel plate have been used in West to East Natural Gas Transmission Project and Natural Gas Transmission Project from Sichuan to East China in large quantity. 26000T X70 wide plate are used in the above second project，which breaking the monopoly of Japanese and Korean steel works on the market of steel plate for large diameter straight beam welded pipe.
Construction site of West to East Natural Gas Transmission Project main pipeline.
Shanghai Terminal Station
