What Is a Continuous Casting Machine?
The production process of continuously casting high temperature molten steel into a slab with a certain cross-sectional shape and a certain size is called continuous casting steel.
- Continuous Caster Production Process. The high-temperature molten steel is continuously poured into one or a group of water-cooled copper molds. The molten steel gradually solidifies into a green shell along the periphery of the mold. The slab is drawn out and spray-cooled by the secondary cooling zone to completely solidify the slab. The cutting device cuts it to a fixed length according to the requirements of the rolling steel. This process of making high temperature molten steel directly cast into slab is called continuous casting. Its appearance has fundamentally changed the rolling process of steel ingots that has dominated for a century. Because it simplifies the production process, improves production efficiency and metal yield, saves energy consumption and greatly reduces production costs, and the advantages of good billet quality have been rapidly developed. Nowadays, whether it is long-flow steelmaking or short-flow steelmaking, the continuous casting machine is almost inevitable.
- Continuous casting machines can be classified in many forms. According to the shape of the structure, the continuous casting machine can be divided into vertical continuous casting machine, vertical bending continuous casting machine, with linear section
- Generally, the continuous casting machine consists of a molten steel carrying device (
Digital continuous casting machine
- Breaking through traditional concepts and replacing traditional control ideas with advanced digital technology, not only demonstrates superb process realization capabilities, but also because of the nature of its structure, which makes it impossible to achieve the effects of traditional systems, without the need for complex system design, Parameter settings and repeated adjustments, not to mention performance changes due to long-term operation.
- Digital Continuous Caster Technology
Hydraulic control of continuous casting machine
- The hydraulic vibration control system passed 6 million continuous vibration tests. The test data results fully meet the actual production requirements, and the equipment is intact. Because of the use of international advanced seal structure design, the billion hydraulic oil cylinder not only does not cause any leakage, but also greatly improves the life of the seal, which makes the system operating cost much lower than the mechanical vibration system. The friction of the mold wall on the moving green shell is considered to be the basic factor that tears the green shell and thus limits the casting speed. There is a liquid slag film between the primary green shell and the mold wall. The friction here is viscous friction, that is, the magnitude of the friction force is proportional to the relative speed of movement, and the viscosity of the slag film is inversely proportional to the thickness of the slag film. In this way, during the positive vibration slippage of the mold, this friction force and the tensile stress on the green shell are relatively large, and the primary green shell may be cracked. Therefore, a non-sinusoidal vibration technology was developed to reduce this friction. Theoretical research and simulation experiments show that the proper selection of non-sinusoidal vibration parameters (slope) can reduce friction by 50% to 60%. Through the simple transformation of the ordinary continuous casting machine, Yimeibo Technology realized 400 times of hydraulic vibration, the deflection rate reached 50%, and it can be adjusted online. It is a new technology to realize high-quality and high-throughput continuous casting machine transformation.
Continuous Caster Digital System
- In the dynamic soft reduction process, the continuous casting machine can control the final solidification stage to avoid loosening of the slab center and minimize segregation. Dynamic soft reduction can produce slabs with the best inherent quality. As the principle of direct strip rolling of thin slabs continues to be successfully practiced around the world, steel companies that produce high-quality products have begun to adopt soft reduction control technology.
- Digital slab mold online width control system. Avoid frequent replacement of the mold, improve the continuous casting machine operation rate, and achieve user specifications of multiple specifications and small batches.
- Digital continuous casting machine mold two cold water control system. The digital regulating valve is directly controlled by PLC, which avoids the vibration and corresponding lag that are easy to occur in electric servo valves and pneumatic membrane valves, and accurately realizes the secondary cold water dynamic control.
- Continuous casting machine (3 photos)
- As for the water cooling of the continuous casting machine, it mainly consists of a rotary joint, a water pipe, a water pump, and sufficient water sources. The water cooling system of the continuous casting machine mainly cools the slab idler of the continuous casting machine.