Acid washing unit

Our company currently adopts a relatively advanced shallow groove turbulent flow push-pull pickling unit, which has the characteristics of reasonable structure, high operating efficiency, low production consumption, easy operation, and few operational failures.

Equipment features

• 1. Adopting a more efficient dual roll method can effectively improve the utilization rate of the equipment.

• 2. Set up a sewing machine to improve the ability to produce thin gauge strip steel.

• 3. Adopting advanced shallow groove turbulent acid washing technology, the acid washing efficiency is high and the effect is good.

• 4. Using electrostatic oiling equipment, the oiling thickness is uniform, saving fuel consumption< br/>

Reversible cold rolling mill

Cold rolled plate is made from high-quality hot-rolled steel coils that have undergone acid washing to remove iron oxide scales. After being subjected to rolling deformation on a reversible cold rolling mill, it is processed through annealing, leveling, and finishing. Cold rolled products have excellent mechanical and processing properties, as well as precise thickness, and are widely used in industries such as construction, automotive, home appliances, and transportation. They are also used as raw materials for hot-dip plates.

Equipment features

• 1. The main rolling mill, uncoiler, and front and rear coilers adopt fully digital DC speed regulation and thyristor power supply. Unit PLC control.

• 2. Fully hydraulic compression, computer-controlled automatic thickness control (AGC). The hydraulic AGC system adopts two-level computer control, which not only has the functions of constant roll gap, constant rolling force and thickness monitoring, but also has tension AGC, etc.

• 3. The rolling mill has plate shape control measures such as pressure reduction and deviation, positive/negative bending of the working roll, middle lifting and positive bending, pre-set middle lifting and lateral movement, and segmented cooling. Methods such as high rolling force, high rolling torque, and high tension rolling effectively ensure controllable thickness difference.

• 4. The uncoiler has CPC automatic centering function. The automatic roll up (EPC) of the coiler accurately stops, memorizes the number of turns, and automatically decelerates and stops with the tail.

• 5. Quickly change the work roll and intermediate roll.

• 6. The electrical system of the rolling mill has safety protection systems such as overload protection, strip breakage protection, and emergency stop. The main engine and coiler have automatic deceleration with tail, accurate stopping function, and lap memory function.

• 7. Rolling mill speed control; Unwinding and coiling machine speed and tension control, digital display.

• 8. The elevation of the rolling line is automatically and quickly adjusted.

• 9. Oil mist lubrication for rolling mill bearings.

• 10. The production process interlocking and fault alarm of the unit adopt PLC programmable control to achieve automation of the production process.

• 11. The unit has a pre-set process parameter, detection, display, and alarm system for process parameters and key equipment parameters. Fault self diagnosis alarm and automatic protection for belt breakage< br/>

Pickled five rolling mill unit

Being able to ensure the rolled plate shape not only makes the surface of subsequent products more beautiful, but also effectively improves production efficiency. The production line consists of Miebach welding machines, uncoiler machines, scale breaking machines, Shimak disc cutters, double roll Carousel coilers, plate shape testers, speedometers, and other equipment.

Equipment features

• 1. The pickling section adopts advanced shallow groove floc flow pickling process, which has short pickling time and high pickling efficiency; Adopting steel lined rubber acid tank and double-layer sealed tank cover, the acid tank has a long service life, is easy to maintain, and can reduce acid consumption; Adopting a five stage cascade countercurrent rinsing process, with low water consumption and good cleaning effect.

• 2. Using the Ximark disc cutter, the cutting edge can be replaced online, saving parking time, with high cutting accuracy and fewer burrs, ensuring product quality.

• 3. Continuous rolling of strip steel with five stands, equipped with four sets of thickness gauges and a plate shape gauge at the exit of the rolling mill, to achieve closed-loop control of plate shape in conjunction with the work of the rolling mill, including positive and negative bending rolls, intermediate roll positive bending rolls, and fine segmented cooling spray system.

• 4. Due to the use of fully continuous headless rolling, the thickness of the strip steel is uniform, the head and tail losses are low, and the yield rate is high. Under the original technical conditions, a single stand reversible rolling mill allows the strip steel to undergo multiple passes of rolling back and forth on the stand during rolling< br/>

Galvanizing unit

The galvanizing production line is a complete set of equipment for double-sided high-temperature hot-dip coating of steel coils with a layer of zinc alloy coating. The production line consists of equipment such as uncoiler, welding machine, material storage machine, degreasing and cleaning unit, continuous annealing furnace, zinc pot, air knife, finishing machine, puller, oiler, shearing machine, rewinder, etc.

Equipment features

1. Equipped with strip steel chemical cleaning or high-efficiency electrolytic cleaning section, the unique electrolytic cleaning jet mixing technology can achieve higher current efficiency and avoid oil contamination when the plate is taken out of the slot. The directional overflow of the liquid level ensures that the electrolytic liquid level has little explosive gas foam, and the system is safe to use.

2. Adopting a combination of non oxidizing (NOF) and radiant tube heating (RTH) technology, the heating speed is fast, the thermal efficiency is high, and the control method is more precise, which can significantly improve the insulation effect and service life in high-temperature areas.

3. After annealing and reduction, the cooling of the strip steel adopts circulating spray protective gas cooling, variable frequency speed control, and high-pressure high-speed jet flow. The cooling speed is fast and uniform, which can accurately control the process temperature of the strip steel entering the zinc pot.

4. Straightening machines and finishing machines can effectively improve the surface and shape quality of finished products, enhance product coating and cold stamping mechanical performance.

5. Adopting the technology of recovering flue gas waste heat, low-temperature flue gas waste heat is recovered through flue gas water heat exchange or waste heat steam boiler, and supplied to the liquid heating of the cleaning section, which improves the thermal energy utilization rate and reduces product energy consumption.

6. Adopting a jet type ceramic induction heating zinc pot, it has the advantages of fast heating, uniform temperature and alloy composition, long service life, and less zinc slag. The furnace is equipped with wet ammonia gas and circulating zinc pump device, which can significantly improve the surface accuracy of the plate and strip, especially suitable for the quality requirements of household appliance coating substrates.

7. The use of a coating thickness measuring instrument can monitor the actual thickness of the coating in real time and guide the precise adjustment of the air knife.

8. Adopting a fingerprint resistant coating roller coating machine with a fast switching device, the equipment layout of the process section is effectively optimized, and precise organic or composite coatings can be obtained on the surface of the strip steel.

9. The control system adopts control technologies such as vector frequency conversion speed regulation, CPC and EPC correction, and fieldbus, ensuring stable and reliable equipment.

Color coating unit

A complete set of production equipment for composite formation of a new type of functional board is produced by coating multiple layers of organic coatings on the surface of steel coils and strips through continuous roll coating, such as silicon modified polyester (SMP), high weather resistant polyester (HDP), fluorocarbon (PVDF), etc., after surface degreasing, phosphating, and bell ringing treatment. The production line consists of equipment such as unwinding machine, sewing machine (welding machine), material storage machine, degreasing and cleaning unit, coating machine, curing furnace, shearing machine, rewinding machine, etc.

Equipment features

1. Advanced continuous roller coating process, with two coatings and two baking on both sides, mature and reliable technology.

2. The pre-treatment adopts continuous alkali circulation spraying, brushing, multi-stage circulation water spraying, and fresh water spraying to enhance the cleaning effect, clean the surface of the strip steel, and ensure the adhesion of the coating paint.

3. Adopting advanced environmentally friendly synthetic treatment solution, equipped with high-precision coating machine, the film-forming coating is uniform, with significant characteristics such as high utilization rate of chemical agents, no pollution, and good film-forming adhesion.

4. The coating roller coating machine is equipped with a pressure sensor to accurately display the coating roller pressure, which can control the uniformity of the coating accurately. Through the vector motor variable frequency speed regulation, forward or reverse coating operations can be carried out, and the coating thickness can be accurately controlled to within 1 micron to meet the production needs of various products.

5. The coating curing and drying oven adopts a multi-layer maze type plug-in plate structure with good insulation effect, equipped with VOC incineration and a complete and fine waste heat recovery and utilization device, which meets the national environmental emission standards, saves energy, reduces consumption and increases efficiency, and has the technical level of organic waste gas cracking and thermal energy utilization. It has obtained multiple patents.

6. The control system adopts computer control systems such as vector motor variable frequency speed regulation, fieldbus and fiber optic communication, real-time parameter monitoring technology, etc., ensuring safe and stable operation of the equipment.

7. Introduce intelligent production and energy management systems, and configure multiple fine adjustment energy-saving and consumption reducing production control technology equipment.