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Application
This hot dip galvanizing production line is suitable for continuous annealing and hot galvanizing of low carbon steel wire. Considering that the customer has a plan to produce high carbon hot-dip galvanized steel wire in the later stage, it can also be compatible with production, and there is no need to build a new production line.
Specifications
Rotating uncoiling stand: 28 pcs;
Wire annealing furnace:
·The online annealing furnace is 25m long, 2.0m wide in total and 1.40m wide, which is composed of multiple sections.
·Each furnace tube is let through with a wire, 28 wires in total.
·Fuel: natural gas
·Temperature control accuracy: ± 5 ℃
·Temperature control range of furnace: 600-1000℃, adjustable.
·The total number of heads is 28 pieces. The furnace bottom is supported by pipe frame.
·Light fire-resistant and thermal insulation materials are used, and the surface is closed by steel structure, with good thermal insulation performance.
·20 burners are arranged on the side, and the combustion control furnace temperature is adjusted in four sections in proportion.
Cooling and scale removing, 1 set: After the steel wire is discharged from the furnace for a period of air cooling, it shall be mechanically loosened and most of the oxide scales shall be blasted in the hot water tank.
Pickling and water cleaning, 1 set
Fluxing tank:
Overall dimension: 3500 *1400 *500mm (L,W,H);
Material: stainless steel
Heating mode: flue waste heat and auxiliary electric heating, with 30kw heating power automatic control.
Drying oven:
Size: 8000*1500 (L,W);
Heating method: flue wast heat;
Gas zinc galvanizing furnace:
Number of heads: 28 pieces;
Wire spacing: 40mm;
External heating;
Annual working time: 7500h;
Temperature control range of hot galvanizing zinc liquid: 440 ℃～ 460 ℃ adjustable;
Zinc temperature control accuracy: ± 2 ℃;
Zinc layer thickness range: 100g~250g/㎡;
Furnace structure: the zinc kettle is made of 50mm thick special steel plate, pressed and welded.
Zinc furnace effective size: 6000 *1400 *900mm (L*W*D).
Zinc capacity about 48t
Heating temperature control: staged proportional control combustion；
The press roll is special ceramic fixed type, and it is to be replaced once a year.
Lead out mode and cooling: Vertical leading out is adopted. Low carbon steel wire is wiped with asbestos block, and high carbon steel wire is wiped with charcoal+asbestos fiber+graphite chips. The cooling mode is water cooling.
2. Main process technical parameters
2.1 Production process flow
A) Low carbon wire hot dip galvanizing process: uncoiling--- annealing --- skin cracking --- pickling --- water rinsing --- hot water washing --- fluxing--- drying --- hot galvanizing --- wiping cooling --- wire taking up.
2.2 wire specification: ￠1.60---5.00mm
2.3 head number and output
According to the customer's requirements, the annual output is 8000 tons, and the hourly output is about 1500 kg based on ￠2.40mm. The linear speed is 20m/min, and the customer needs 28 heads.
2.4 fuel: electrical and gas combined;
2.5 zinc layer weight: 80--350 g/m²;
