Casting terus-terusan tundish molten steel peralatan pemanas induksi

1 Ringkesan

Tundish molten steel peralatan pemanasan induksi technology is developed with the progress of continuous casting technology, the improvement of steel quality requirements, the need for energy saving and consumption reduction, and the matching of external refining and continuous casting processes. Different steel grades have different requirements on the AT of molten steel superheat. For thick plates, in order to reduce internal cracks and loose center, the AT should be low (5~200T); for cold-rolled thin plates, the surface is required to have good quality. Higher (15~300℃). However, the molten steel superheat must be stabilized within a certain range to minimize fluctuations. This is a necessary condition to ensure the smooth progress of continuous casting production, prevent nozzle blockage or prevent leaking accidents, and ensure the quality of cast slabs. The enhancement of the heating function of the tundish makes it possible to control the superheat of molten steel stably. The temperature of the molten steel of different ladle fluctuates, which has an adverse effect on the continuous casting process, and the heating of the tundish can compensate for it to some extent. However, it must be pointed out that maintaining a stable molten steel superheat mainly depends on the proper tapping temperature and the adjustment structure after tapping, and the tundish heating can only play a supplementary role. Nevertheless, the heating and control of molten steel in the tundish is still receiving attention from the metallurgical community. Some countries represented by Japan, the United States, the United Kingdom, and France have successively carried out research on tundish molten steel heating technology from the 1970s to the 1980s. Japan’s Kawasaki Company first developed and obtained a Japanese patent as early as 1982. At present, the tundish molten steel heating technology successfully developed or under development usually adopts the physical heating method. In the physical heating method, electric energy is used as the heat source and converted according to the electric energy. Different mechanisms can be divided into: electromagnetic induction heating equipment, plasma heating, electroslag heating and DC ceramic heating technology.

Tundish induction heating equipment has the following characteristics:

(1) Kacepetan pemanasan cepet lan efisiensi pemanasan listrik sing dhuwur;

(2) Some types also have a certain electromagnetic stirring effect, which is conducive to the removal of inclusions;

(3) Suhu proses gampang dikontrol, lan sing paling penting yaiku ngontrol superheat baja molten kanthi luwih akurat;

(4) The heating power is limited by the depth of the tundish liquid level. Only when the molten steel in the tundish accumulates to a certain depth, the heating can proceed smoothly.

Ana sawetara jinis peralatan pemanas induksi tundish:

(1) According to the type of inductor, it can be divided into coreless induction heating equipment and cored induction heating equipment;

(2) According to the structure of the inductor, it can be divided into increased fault type and tunnel type (groove, molten trench) induction heating equipment;

(3) According to the heating part, it can be divided into local heating and overall heating.

2 Casting terus-terusan tundish baja molten piranti peralatan pemanasan induksi elektromagnetik

2. 1 Tundish electromagnetic induction heating equipment matched with horizontal continuous casting machine

Peralatan pemanasan induksi elektromagnetik tundish sing cocog karo mesin casting terus horisontal ditampilake ing Gambar 10-7.

The production process of a stainless steel plant is now explained.

Gambar 10-7 Peralatan pemanas induksi elektromagnetik Tundish sing cocog karo mesin casting terus-terusan horisontal

After all kinds of stainless steel are batched, they are loaded into three 5t induction furnaces from the feeding tank with cranes. After the scrap steel is melted to the required temperature (about 1650°C), the molten steel in the induction furnace is poured into the ladle, and then used The truck pours the molten steel into the 8t AOD furnace, where it undergoes decarburization, slagging, dephosphorization and sulfur removal, and adjustment of the alloy composition (mainly Cr, Ni), and then the molten steel (the composition and temperature meet the requirements) Put the molten steel in the ladle into the ladle and use the crane to pour the molten steel in the ladle into the ladle of the 8t electromagnetic induction heating equipment. The stainless steel liquid heated by heat preservation is drawn and casted into a round bar by a horizontal continuous casting machine and finally pushed into the cooling bed by forming and shearing. .

The physical object of the 8t electromagnetic induction heating equipment ladle is shown in Figure 10-8.

8t and 14t tundish electromagnetic induction heating equipment, the tundish induction heating equipment can strictly and accurately control the temperature of the molten steel (the error range is only ±5~6℃), thus ensuring the quality of the billet. In addition, the temperature adjustment time of the tundish can also be appropriately extended, showing the good effect of induction heating equipment.

2. 2 piranti Tundish peralatan pemanasan induksi saka mesin casting terus-terusan

Piranti tundish saka peralatan pemanasan induksi saka mesin casting terus-terusan ditampilake ing Gambar 10-9.

Sawise busur billet terus caster adopts induksi elektromagnetik peralatan dadi panas tundish, suhu nunyuk bisa sudo (contone, iku bisa

Gambar 10-9 Piranti Tundish saka peralatan pemanasan induksi saka mesin casting terus-terusan

From 1700°C to 1650°C), this not only helps to improve the life of steelmaking furnace lining (converter, electric arc furnace or induction furnace), but also stabilizes the temperature of molten steel in continuous casting and guarantees the quality of continuous casting billets.

Adhedhasar introduksi ing ndhuwur, bisa dianggep manawa peralatan pemanasan induksi magnetik tundish terus-terusan minangka teknologi hemat energi lan ramah lingkungan. Adopsi piranti iki minangka proyek transformasi teknologi sing cocog kanggo perusahaan metalurgi, lan pantes promosi lan digunakake.

Figure 10-10 shows the 16t tundish electromagnetic induction heating equipment.

Figure 10-10 16t tundish electromagnetic induction heating equipment

Gambar 10-11 minangka diagram skematik tundish saka peralatan pemanas induksi 14t.

Figure 10-11 Schematic diagram of the tundish of 14t induction heating equipment