Protective atmosphere electro-slag continuous casting furnace

Abstract

The invention discloses a protective atmosphere electro-slag continuous casting furnace, which belongs to metal electro-slag re-melting equipment. The furnace comprises an alternating current power supply, electrode lifting mechanisms, a consumable electrode, a conductive crystallizer, a supporting mechanism, a molten steel liquid level detection device, an argon protective cover, a vibration mechanism, a throwing mechanism, a cutting device and a control system. The electrode lifting mechanisms are fixed on two sides of the conductive crystallizer; one end of the consumable electrode is fixed on a cross arm of the electrode lifting mechanism and is connected with the alternating current power supply, while the other end passes through the argon protective cover and is placed inside the conductive crystallizer; the conductive crystallizer is a jacket type water-cooled crystallizer with combined upper and lower parts, a conductive ring is embedded at the upper wall, and the conductive ring is connected with the alternating current power supply through a cable so that a loop is formed from the alternating current power supply, the consumable electrode, furnace slag, the conductive ring to the alternating current power supply; the vibration mechanism is fixed on the supporting mechanism, and a cam of the vibration mechanism is tightly contacted with a shell of the conductive crystallizer; the joint of upper and lower cavities of the conductive crystallizer is provided with the molten steel liquid level detection device; the throwing mechanism and the cutting device are fixed under an ejection port of the conductive crystallizer in turn; and the control system is electrically connected with the cross arm of the electrode lifting mechanism, the molten steel liquid level detection device, the drawing mechanism and the cutting device respectively. The protective atmosphere electro-slag continuous casting furnace can realize electro-slag continuous casting.

Description

technical field [0001] The invention belongs to metal electroslag remelting equipment, in particular to an electroslag continuous casting furnace, which is applied in the metal remelting smelting process. Background technique [0002] Electroslag furnace is a kind of metallurgical equipment that uses the resistance heat source generated when current passes through slag for smelting. Steel smelted by electroslag furnace has the advantages of high purity, low sulfur content, less non-metallic inclusions, smooth surface of steel ingot, uniform and dense crystallization, uniform metallographic structure and chemical composition. Therefore, electroslag furnace equipment has been widely used in steel, machinery and other industries at home and abroad. With the development of electroslag equipment, there are the following main defects in the melting of small diameter steel ingots: [0003] 1. In the traditional electroslag furnace smelting process, the remelting speed of the stee...

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Problems solved by technology

For example, high-speed tool steel, when the steel ingot size is large, even if the melting speed is very low, the carbide size is too large and the segregation exceeds the standard, which seriously affects the quality of the steel.

[0005] 3. Traditional electroslag remelting adopts the intermittent production method of remelting one steel ingot at a time, which not only has low production efficiency, but also removes a large amount of the head and tail of the steel ingot during the subsequent forging or preliminary rolling blanking process, and the yield of steel Very low and thus high production costs

[0007] 1. The open electroslag continuous casting process will cause hydrogen, oxygen, nitrogen and other elements in the air to mix into the molten metal pool, causing pollution of molten steel and burning of alloying elements

[0008] 2. If the liquid state starting method is adopted, it is necessary to equip the slag melting furnace and the equipment for transferring the liquid slag to the crystallization furnace, which increases the investment cost of the equipment

[0009] 3. Due to the bipolar series smelting technology, in order to cast a billet with a small cross-section, the crystallizer must be limited to a T-shaped crystallizer, and a large current passes through the billet, and its thermal effect makes the cooling and solidification of the billet very slow, and then Affects the overall smelting speed, lower production efficiency and higher smelting cost

[0010] 4. There are often impurities sticking between the billet outlet of the crystallizer and the steel billet, resulting in poor billet discharge

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