Full Continuous Rolling Bar Rolling Mill Line
Bar Rolling Mill Annual Capacity: 30,0000 ∼ 50,0000 TPY
The billet is 150mm *150mm *8000mm continuous casting billet with a billet weight of 1404 kg.
Products: hot rolled round steel, ribbed steel bar.
Rolling Speed: maximum finishing speed of 16 m/s.
Specification: round steel ∅14mm~∅40mm, ribbed steel ∅12mm~∅40mm.
Steel Grades: ordinary carbon structural steel, high-quality carbon structural steel, low alloy steel, alloy steel, anchor chain steel, steel for standard parts, etc.
Production Process
Continuous Casting Billet → Reheating Furnace → Roughing Rolling Mill → 1 Flying Shear → Medium Rolling Mill → 2 Flying Shear → Finishing Mill → Step Rack Type Flying Shear → Walking Beam Cooling Bed → Cold Shear → Inspection Collection →Bundling, Tying and Packaging → Weighing Storage
Full Continuous Rolling Technology
This bar rolling mill production line is a fully continuous bar rolling mill production line. There are 18 rolling mills in the whole rolling mill line, which are divided into roughing mills, intermediate rolling mills, and finishing mills.
Each unit is composed of six short stress rolling mills arranged alternately by horizontal rolling mills and vertical rolling mills, of which the 16th and 18th are horizontal-vertical convertible mills, and each stand is driven by a DC motor alone. The whole bar rolling mill line adopts full continuous rolling and non-twist rolling, and the roughing mill and intermediate mills adopt micro-tension rolling.
After the 12th rolling mill, vertical loopers are set up between the stands to implement tension-free rolling, thus producing high-precision products. The bar rolling mill line is controlled automatically by the computer to realize single-line continuous rolling with the maximum finishing speed of 16 m/s.
Reheating Furnace
The reheating furnace is a three-stage continuous pusher-type reheating furnace with an effective size of 8400mm *18096mm, a single row of feed, coke oven gas as fuel, and a design capacity of 80t/h.
Roughing Mill
The roughing mill consists of six flat-vertical short stress mills arranged alternately. The nominal diameter of the roll is 550 mm, and the length of the roll body is 760 mm. The range of application is 610 mm to 520 mm.
There is a crank flying shear at the exit of rough rolling mill. The maximum cross-section is 4000mm. It is used to cut the head and tail of the rolled piece after rough rolling and to break the rolled piece in case of an accident.
Intermediate Rolling Mill
The intermediate rolling mill is composed of six short stress mills arranged alternately by horizontal and vertical mills without archway. The nominal diameter of the roll is 400 mm, and the length of the roll body is 650 mm. The range of application is 430 mm to 370 mm.
There is a crank flying shear at the exit of the medium rolling mill. The maximum section of the shear is 2050 mm. It is used for cutting the head and tail of the rolled piece after medium rolling and breaking the rolled piece in case of an accident.
Finishing Mill
The finishing mill consists of three flat, one vertical and two flat-vertical convertible short stress mills without archway. The nominal diameter of the roll is 350 mm, and the length of the roll body is 650 mm. The range of application is 370 mm to 310 mm.
The finishing mill is equipped with a crank rotary changeable flying shear with a maximum shear section of 1300 mm and a length of 45 m to 72.
Bar Rolling Mill Cooling Bed
The cold bed is a stepping rack type with an area of 8m*78m, a rack spacing of 300mm/600mm, a pitch of 80mm and a working period of less than 2.8s.
Fixed Length Cold Shear
Fixed-length cold shear is upper-cut, the shear force is 5 kN, blade width is 950 mm, shear times are 10 times per minute.
