Part 1
Production scale,
raw materials and product specifications
1. Workshop production scale:
Rated working time of the year 6500
hours, the annual production tells 600,000 tons of non-twisted hot rolling wire
rod products.
2.Raw
materials:
The continuous casting billet
produced by the steel making workshop is used as raw material.
Blank
specification: 150*150*6000-12000mm, 165*165*6000-12000mm
3. Product:
High
speed twistless hot rolling wire rod
Product
specifications: ¦µ5.5-16mm glossy wire rod
¦µ6.0-16 threaded wire
rod
Coil
inner diameter:¦µ850mm
Coil
outer diameter: ¦µ1250mm
Production
of steel grades: ordinary carbon steel, high quality carbon structural steel,
low alloy steel, welded steel (including new material welded steel), cold
heading steel, bearing steel and so on.
Delivery
status: delivery in rolls, 4 traps.
Coil
parameters: inner diameter ¦µ850mm, outer diameter¦µ1250mm, coil weight~2000kg
Product
accuracy: ¡À0.15mm
Ellipticity
is not greater than 80£¥ of the total deviation
Executive
standard: ZBH44001-88(B); ZBH44002-88; GB701+1997; YB4027-91; GB/4354-1994;
GB/T3429-2002; GB/T6478-2001;
GB/T14981-1994(B); YB/T038-93 and so on.
Part 2
Processflow introduction
Process flow:
The entire production line is arranged in an elevated position. The main unit
is arranged on a platform higher than 5 meters.
Continuous
casting billet hot feeding - heating furnace heating - high pressure water
descaling - roughing mill rolling -1# flying shear head, tail cutting - medium
rolling mill rolling - 2# flying shear head, tail cutting - pre Finishing mill
rolling-water cooling-3# flying shear head-finishing mill rolling-water
cooling-spinning machine spinning into coils-winding cooling-collection-cutting
head-coil shipping line transportation- Sampling, inspection - compaction and
bundling - weighing, listing - unloading - lifting and storage
Part 3
Main design features and equipment level of the
production line
l High-pressure water descaling technology before rolling to improve
the surface quality of the wire;
l The full-line rolling mill adopts a flat and alternate continuous
arrangement scheme, and the rolling stock is not twisted, thereby reducing
accidents and quality problems caused by twisting;
l The coarse and medium-sized rolling mill adopts a new type of
short-stress rolling mill, which has been gradually improved and is now
reaching the advanced level in the industry.
l The finishing mill adopts the Morgan type V generation top 45 degree
rolling mill, which proves to have high reliability through production
practice. The mill has a maximum design speed of 105m/s and a guaranteed speed
of 90m/s.
l The hole type system adopts elliptical-round hole type, and the
pre-finishing and finishing rolling mill adopts rolling guide to ensure stable
rolling and reduce scratches.
l Main design features and equipment level of the production line
l High-pressure water descaling technology before rolling to improve
the surface quality of the wire;
l The full-line rolling mill adopts a flat and alternate continuous
arrangement scheme, and the rolling stock is not twisted, thereby reducing
accidents and quality problems caused by twisting;
l The coarse and medium-sized rolling mill adopts a new type of
short-stress rolling mill, which has been gradually improved and is now
reaching the advanced level in the industry.
l The finishing mill adopts the Morgan type V generation top 45 degree
rolling mill, which proves to have high reliability through production
practice. The mill has a maximum design speed of 105m/s and a guaranteed speed
of 90m/s.
l The hole type system adopts elliptical-round hole type, and the
pre-finishing and finishing rolling mill adopts rolling guide to ensure stable
rolling and reduce scratches.
Part 4
Main equipment structure parameters
1. Furnace area
2. Rough and medium rolling area
3. Pre - finish rolling and finish rolling
4. Cooling control - water piercing and coil cooling lines
5. collecting area
