Electric arc furnace and preparation method thereof

Abstract

The invention relates to a steel-making smelting technology, in particular to an electric arc furnace and a preparation method thereof. The electric arc furnace comprises a hearth, a furnace cover, an electrode, a tap hole and a furnace door, wherein the electrode is inserted into the furnace through a hole in the furnace cover, the furnace cover covers the hearth, the tap hole and the furnace door are formed on a covering place between the furnace cover and the hearth, an asbestos board is laid closely on the surface in a furnace body of the hearth, alumina bricks are laid on the asbestos board, magnesia is laid on the alumina bricks, brine magnesia is scattered on the surface of the alumina bricks so as to be solid, and magnesia pipes and magnesia carbon bricks are laid on the alumina bricks until the furnace door is level to the tap hole. According to the electric arc furnace, a water tank in the conventional electric arc furnace is replaced, the weld failure of the water tank caused by erosion of the water tank by the molten steel or the excess temperature is avoided, so that the water and the molten steel cannot be mixed to cause explosion of a smelting furnace and potential safety hazard so as to destroy the equipment and increase the production cost, and meanwhile, the influence on the quality of the produced products caused by the steel drop of the molten steel due to the contact of the molten steel and the water is avoided.

Description

technical field

[0001] The invention relates to steelmaking and smelting technology, in particular to an electric arc furnace and a preparation method thereof. Background technique

[0002] In the prior art, the furnace of the electric arc furnace is smelted by the water tank in the furnace using circulating water to cool it. During this process, when the molten steel is washed into the water tank or under high temperature, the weld seam of the water tank cracks, resulting in Water leakage, when the water and molten steel are in contact, it will cause an explosion in the furnace, causing equipment damage and safety hazards, thereby increasing production costs; and when the water tank leaks, water will enter the molten steel, causing the molten steel to leak, thereby affecting production The quality of molten steel coming out.

[0003] Therefore, in order to avoid the technical problems existing in the prior art, we urgently need to provide a new idea for the electric arc fu...

Examples

Embodiment 1

[0022] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1. Sprinkle a layer of magnesia 11 and tamp it tightly, and then sprinkle with brine magnesia in layers with a thickness of ≤80mm to knot the furnace bottom 1, first knot the arc-shaped part of the furnace bottom 1, and then knot the slope of the furnace bottom 1, Beat until the surface turns white and there is a ...

Embodiment 2

[0024] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1, the high-alumina brick 12 The alumina content is ≥ 48%, which is made of raw materials with high alumina content after molding and calcining; sprinkle a layer of magnesia 11 on the surface of high alumina brick 12 and compact it, and then divide it with brine magnesia Layer thickness ≤ 80mm to knot the furnace ...

Embodiment 3

[0026] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1, the high-alumina brick 12 The aluminum oxide content is ≥ 48%, which is made of bauxite after molding and calcination; spread a layer of magnesia 11 on the surface of high alumina brick 12 and compact it, and then layer with brine magnesia to a thickness of ≤ 80mm Knotting the furnace bottom 1, first knot the a...

technical field

[0001] The invention relates to steelmaking and smelting technology, in particular to an electric arc furnace and a preparation method thereof. Background technique

[0002] In the prior art, the furnace of the electric arc furnace is smelted by the water tank in the furnace using circulating water to cool it. During this process, when the molten steel is washed into the water tank or under high temperature, the weld seam of the water tank cracks, resulting in Water leakage, when the water and molten steel are in contact, it will cause an explosion in the furnace, causing equipment damage and safety hazards, thereby increasing production costs; and when the water tank leaks, water will enter the molten steel, causing the molten steel to leak, thereby affecting production The quality of molten steel coming out.

[0003] Therefore, in order to avoid the technical problems existing in the prior art, we urgently need to provide a new idea for the electric arc fu...

Examples

Embodiment 1

[0022] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1. Sprinkle a layer of magnesia 11 and tamp it tightly, and then sprinkle with brine magnesia in layers with a thickness of ≤80mm to knot the furnace bottom 1, first knot the arc-shaped part of the furnace bottom 1, and then knot the slope of the furnace bottom 1, Beat until the surface turns white and there is a ...

Embodiment 2

[0024] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1, the high-alumina brick 12 The alumina content is ≥ 48%, which is made of raw materials with high alumina content after molding and calcining; sprinkle a layer of magnesia 11 on the surface of high alumina brick 12 and compact it, and then divide it with brine magnesia Layer thickness ≤ 80mm to knot the furnace ...

Embodiment 3

[0026] like figure 1 and figure 2 As shown, a preparation method of an electric arc furnace comprises furnace bottom 1, furnace cover 2, electrode 3, tapping hole 4, furnace door 5, electrode 3 is inserted into the furnace through the hole on furnace cover 2, and furnace cover 2 is covered in On the furnace bottom 1, a tap hole 4 and a furnace door 5 are formed at the joint between the furnace cover 2 and the furnace bottom 1, and a 5mm, 6mm, 7mm, 8mm, 9mm or 10mm thick asbestos board 10, spread the asbestos board 10 to the furnace door 5 and the tapping hole 4, and lay a layer of high-alumina bricks 12 on the surface of the asbestos board 10 at the furnace bottom 1, the high-alumina brick 12 The aluminum oxide content is ≥ 48%, which is made of bauxite after molding and calcination; spread a layer of magnesia 11 on the surface of high alumina brick 12 and compact it, and then layer with brine magnesia to a thickness of ≤ 80mm Knotting the furnace bottom 1, first knot the a...

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