Smelting furnace heat preservation device for waste steel recovery treatment

Abstract

The utility model relates to the technical field of smelting furnace heat preservation, and discloses a smelting furnace heat preservation device for waste steel recovery processing, which comprises a crucible and a heat preservation sleeve, the size of the heat preservation sleeve is larger than that of the crucible, the heat preservation sleeve is arranged above the crucible, and an upper annular plate and a lower annular plate are respectively fixed on an outer ring above the crucible and an outer ring below the heat preservation sleeve. First hanging rings are fixed to the two sides of the surface of the upper annular plate, main hanging ropes are connected to the first hanging rings and slidably penetrate through the two sides of the heat preservation sleeve to the position above the heat preservation sleeve, a second hanging ring is fixed to the middle of the surface of the heat preservation sleeve, and auxiliary hanging ropes are connected to the second hanging ring. According to the technical scheme, the heat preservation sleeve which can be arranged above the crucible or sleeved on the outer ring of the crucible is arranged, and when the crucible is arranged in a smelting furnace to be heated, the heat preservation sleeve is supported at the opening of the smelting furnace, so that the opening of the smelting furnace is sealed, and heat loss is reduced; the crucible can be sleeved on the outer ring of the crucible after being taken out, so that heat loss of the crucible and molten iron in the crucible is reduced, and a good heat preservation effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace insulation, in particular to a furnace insulation device for recycling scrap steel. Background Art

[0002] Scrap steel from construction refers to discarded steel materials generated during the construction process of a construction project, including scraps generated during steel cutting and processing, such as the remaining parts after cutting rebar, steel sections, and steel pipes; used steel formworks, including floor formworks, beam and column formworks, etc., which are deformed or damaged after repeated use and cannot be used any longer; scrap scaffolding steel pipes and accessories after dismantling, such as steel pipes, fasteners, connectors, etc.; scrap steel parts generated during the maintenance or replacement of mechanical equipment used on construction sites.

[0003] These scrap steels can be recycled by remelting in a smelting furnace. The smelting furnace mainly comprises a furnace body and a crucible placed in the furnace body. The scrap steel is placed in the crucible in the smelting furnace and heated and smelted.

[0004] The crucible is placed inside the smelting furnace, and its top opening is mostly open, which will dissipate a certain amount of heat. In addition, the crucible will be damaged by heat when it is taken out of the smelting furnace without casting. Therefore, we propose a furnace insulation device for scrap steel recycling. Utility Model Content

[0005] The utility model aims to provide a furnace insulation device for recycling scrap steel. By arranging an insulation sleeve that can be placed above the crucible or sleeved on the outer ring of the crucible, when the crucible is placed in the furnace for heating, the insulation sleeve is supported at the opening of the furnace to achieve sealing of the furnace opening and reduce heat loss. After the crucible is taken out, it can be sleeved on the outer ring of the crucible to reduce heat loss of the crucible and the internal molten iron. It has a good insulation effect and solves the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a furnace insulation device for recycling and processing scrap steel, comprising a crucible and an insulation sleeve, the size of the insulation sleeve is larger than the size of the crucible, and the insulation sleeve is placed above the crucible; the upper outer ring of the crucible and the lower outer ring of the insulation sleeve are respectively fixed with an upper ring plate and a lower ring plate, both sides of the surface of the upper ring plate are fixed with a first lifting ring, the first lifting ring is connected with a main lifting rope, the main lifting rope can slide through both sides of the insulation sleeve to the top of the insulation sleeve; a second lifting ring is fixed at the middle position of the surface of the insulation sleeve, the second lifting ring is connected with an auxiliary lifting rope, and the inner surface of the insulation sleeve is provided with a heat-insulating layer.

[0007] By adopting the above technical solution, when the crucible is placed in a furnace and scrap steel is put in for heating and smelting, the insulation sleeve is supported above the opening above the furnace to achieve the insulation effect of the furnace. When the crucible is lifted up but not cast, the insulation sleeve can be put on the outer ring of the crucible to reduce the heat loss of the crucible and the molten iron inside.

[0008] Optionally, a rope hole is provided on the surface of the insulation cover at the main sling, and the main sling passes through the insulation cover through the rope hole.

[0009] Optionally, a pillar is fixed to the bottom of the insulation sleeve at the rope hole, the pillar passes through to below the insulation layer, and the rope hole also passes through the pillar.

[0010] Optionally, the surfaces of the heat-insulating sleeves on both sides of the rope hole are provided with through openings connected thereto, and the through openings penetrate the pillars.

[0011] Optionally, the size of the through-hole is larger than that of the first hanging ring, and when the insulation sleeve is supported and sleeved on the outer ring of the crucible, the first hanging ring is placed in the through-hole, and the bottom of the support is supported on the surface of the upper ring plate.

[0012] By adopting the above technical solution, it is possible to avoid the support pillars from interfering with the inner side of the insulation sleeve and causing damage to it, and the upper ring plate is interfering with the upper part of the insulation sleeve through the support pillars, avoiding pressure on the insulation layer and causing damage to it.

[0013] Optionally, a hanging ring integrally connected to the crucible is provided on the lower surface of the side edge of the crucible.

[0014] By adopting the above technical solution, during casting, the insulation sleeve can be lifted up, and then the steel cable can be connected through the hanging ring to pour out the molten iron in the crucible.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The technical solution of the present application is to provide an insulation sleeve that can be placed above the crucible or sleeved on the outer ring of the crucible. When the crucible is placed in a furnace for heating, the insulation sleeve is supported at the opening of the furnace to achieve sealing of the furnace opening and reduce heat loss. After the crucible is taken out, it can be sleeved on the outer ring of the crucible to reduce heat loss of the crucible and the molten iron inside, thereby having a good insulation effect.

[0017] 2. The technical solution of the present application is to set a support that passes through the bottom of the thermal insulation layer. When the crucible is lifted alone, the support for the insulation sleeve is achieved through the support, which can avoid the pressure on the thermal insulation layer and damage it. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the furnace insulation device for recycling and treating scrap steel of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the main sling of the furnace insulation device for recycling and processing scrap steel of the utility model passing through the insulation sleeve;

[0021] Figure 3 The utility model is a schematic diagram of the internal structure of the insulation sleeve of the furnace insulation device for scrap steel recycling and processing.

[0022] In the figure: 1, crucible; 11, upper ring plate; 111, first lifting ring; 12, hanging ring; 2, insulation cover; 21, lower ring plate; 22, second lifting ring; 23, rope hole; 231, through-hole; 24, thermal insulation layer; 25, pillar; 3, main sling; 4, auxiliary sling. DETAILED DESCRIPTION

[0023] See also Figure 1-3 The utility model provides a technical solution: a furnace insulation device for recycling and processing scrap steel, comprising a crucible 1 and an insulation sleeve 2, an upper ring plate 11 is fixed around the upper outer ring of the crucible 1, and first hanging rings 111 are arranged on both sides of the surface of the upper ring plate 11, and main hanging ropes 3 are connected and fixed on both sides of the upper ring plate 11 through the first hanging rings 111, and the crucible 1 can be lifted by the main hanging ropes 3. When the crucible 1 is placed in the furnace, scrap steel raw materials are added, and a hanging ring 12 integrally connected to the lower surface of the side of the crucible 1 is arranged, and when the smelted molten iron is lifted together with the crucible 1, the hook at the end of the steel cable can be connected through a scraper ring, and then the crucible 1 can be pulled to flip and pour the molten iron out for casting.

[0024] The size of the insulation sleeve 2 is larger than that of the crucible 1, and the insulation sleeve 2 is placed above the crucible 1. The main sling 3 can slide through the two sides of the insulation sleeve 2 to the top of the insulation sleeve 2. A rope hole 23 is opened on the surface of the insulation sleeve 2 at the main sling 3. The main sling 3 penetrates the insulation sleeve 2 through the rope hole 23, and a second lifting ring 22 is fixed in the middle position of the surface of the insulation sleeve 2. The second lifting ring 22 is connected with an auxiliary sling 4. The inner surface of the insulation sleeve 2 is provided with a thermal insulation layer 24. When the crucible 1 is placed in the furnace and the scrap steel is heated and smelted, the auxiliary sling 4 is used to lower the insulation sleeve 2. A lower ring plate 21 is fixed to the lower outer ring of the insulation sleeve 2, so that the insulation sleeve 2 is supported on the outer ring opened above the furnace through the lower ring plate 21, which can keep warm and reduce heat loss during the heating process.

[0025] The surfaces of the insulation sleeve 2 on both sides of the rope hole 23 are provided with through-holes 231 connected thereto, and pillars 25 are fixed to the bottom of the insulation sleeve 2 at the rope hole 23, and the pillars 25 penetrate to the bottom of the thermal insulation layer 24, and the rope hole 23 and the through-holes 231 penetrate the pillars 25 at the same time. When the crucible 1 needs to lift the molten iron together without temporarily casting, in order to avoid heat loss, the crucible 1 is lifted to a higher height only by the first sling, and the size of the through-holes 231 is larger than the size of the first hanging ring 111. When the insulation sleeve 2 is supported and sleeved on the outer ring of the crucible 1, the first hanging ring 111 is placed in the through-holes 231, and the bottom of the pillars 25 is supported on the surface of the upper ring plate 11, so that the upper ring plate 11 contacts the bottom of the pillars 25 and supports the insulation sleeve 2 to a higher height. When the insulation sleeve 2 is supported to a higher height, the thermal insulation layer 24 is prevented from being damaged by pressure. The insulation sleeve 2 is located on the outer ring of the crucible 1 to keep the crucible 1 and the molten iron therein warm.

[0026] When in use, the crucible 1 is placed in the furnace through the main sling 3, and the insulation sleeve 2 is lifted at a high place by the auxiliary sling 4, and then the scrap steel to be recycled is placed in the crucible 1, and then the insulation sleeve 2 is lowered by the auxiliary sling 4 until the insulation sleeve 2 is supported on the outer ring of the upper opening of the furnace through the lower ring plate 21 at the bottom, so as to seal the upper opening of the furnace. After that, when the furnace is started to heat the scrap steel, the heat loss is reduced and the heat preservation effect is played. When the smelting is completed and the crucible 1 needs to be lifted out but not cast immediately, in order to achieve the purpose of heat preservation, the crucible 1 is lifted only by the main sling 3, so that the upper ring plate 11 of the upper outer ring is supported to the pillars 25 on both sides of the inside of the insulation sleeve 2, and then the insulation sleeve 2 is finally supported and sleeved on the outer ring of the crucible 1, so as to achieve the purpose of reducing the heat loss of the crucible 1 and the molten iron inside it. When casting, the insulation sleeve 2 can be lifted first, and then the steel cable can be connected through the hanging ring 12 to pour out the molten iron in the crucible 1.

Claims

1. A furnace insulation device for recycling scrap steel, comprising a crucible (1) and an insulation sleeve (2), characterized in that: The size of the insulation sleeve (2) is larger than the size of the crucible (1), and the insulation sleeve (2) is placed above the crucible (1); An upper ring plate (11) and a lower ring plate (21) are fixed to the upper outer ring of the crucible (1) and the lower outer ring of the insulation sleeve (2), respectively; first lifting rings (111) are fixed to both sides of the surface of the upper ring plate (11); a main lifting rope (3) is connected to the first lifting ring (111); the main lifting rope (3) can slide through both sides of the insulation sleeve (2) to the top of the insulation sleeve (2); A second lifting ring (22) is fixed at the middle position of the surface of the thermal insulation sleeve (2), a secondary lifting rope (4) is connected to the second lifting ring (22), and a heat insulation layer (24) is arranged on the inner surface of the thermal insulation sleeve (2).

2. The furnace insulation device for recycling scrap steel according to claim 1 is characterized in that: A rope hole (23) is provided on the surface of the heat preservation sleeve (2) at the main sling (3), and the main sling (3) passes through the heat preservation sleeve (2) through the rope hole (23).

3. The furnace insulation device for recycling scrap steel according to claim 2 is characterized in that: A support column (25) is fixed to the bottom of the thermal insulation sleeve (2) at the rope hole (23), the support column (25) penetrates to below the thermal insulation layer (24), and the rope hole (23) also penetrates the support column (25).

4. The furnace insulation device for recycling scrap steel according to claim 3 is characterized in that: The surfaces of the heat-insulating sleeve (2) on both sides of the rope hole (23) are provided with through openings (231) communicating therewith, and the through openings (231) penetrate the pillar (25).

5. The furnace insulation device for recycling scrap steel according to claim 4 is characterized in that: The size of the through opening (231) is larger than the size of the first suspension ring (111); when the insulation sleeve (2) is supported and sleeved on the outer ring of the crucible (1), the first suspension ring (111) is placed in the through opening (231), and the bottom of the support (25) is supported on the surface of the upper ring plate (11).

6. The furnace insulation device for recycling scrap steel according to claim 1 is characterized in that: A hanging ring (12) integrally connected to the crucible (1) is provided on the lower surface of the side edge of the crucible (1).

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