Novel ironmaking brick
By using a composite structure of virgin material refractory layer and high-grade recycled material support layer in ironmaking bricks, the problems of material waste and increased costs in traditional ironmaking bricks are solved, and safety and economy are improved.
Patent Information
- Application Number
- CN202520000045.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-01
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-01
AI Technical Summary
The use of traditional iron-making bricks in the working layer of molten iron ladles results in material waste and increased costs, especially in smelting processes that reduce intermediate steps, where higher performance and safety are required.
The composite structure adopts a virgin material refractory layer and a high-grade recycled material support layer. The high-grade recycled material support layer accounts for 20-35% of the total length of the ironmaking brick and is closely combined with the virgin material refractory layer to form a specific angle and thickness design to improve safety and reduce costs.
The composite structure design improves the safety performance of the bladder, effectively reduces material costs, and enables the large-scale consumption of recycled solid waste refractory materials.
Smart Images
Figure CN223684437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a refractory material technology field for smelting iron, in particular to a novel smelting iron brick. BACKGROUND
[0002] With the improvement of smelting technology of domestic steel plant and the increase of cost pressure, more and more steel plants reduce the intermediate link of hot metal smelting. The hot metal ladle needs to bear the functions of desulfurization and storage of hot metal, therefore, the working layer of the hot metal ladle needs higher use performance, which also brings a substantial increase of cost. The traditional working layer brick is of homogeneous structure, and is taken offline when the residual thickness is about 50mm, causing waste of material. SUMMARY
[0003] Therefore, the utility model wants to solve the technical problem to provide a novel smelting iron brick that can save primary material, reduce cost and ensure the safe online use of the iron ladle.
[0004] In order to solve the above technical problem, the utility model provides the following technical scheme: a novel smelting iron brick, including primary refractory layer and high-grade recycled material support layer, the primary refractory layer and the high-grade recycled material support layer are tightly combined together, and the side wall surface of the primary refractory layer away from the high-grade recycled material support layer is in contact with hot metal to form a hot metal contact surface.
[0005] The length a of the high-grade recycled material support layer of the novel smelting iron brick is less than or equal to 45% of the total length c of the smelting iron brick.
[0006] The length a of the high-grade recycled material support layer of the novel smelting iron brick accounts for 20-35% of the total length c of the smelting iron brick.
[0007] The high-grade recycled material support layer of the novel smelting iron brick is a floor material recycled material layer, an edge material recycled material layer, a defective material recycled material layer, a used slide plate material recycled material layer or a used steel ladle pool recycled material layer.
[0008] The thickness of the primary refractory layer and the high-grade recycled material support layer of the novel smelting iron brick is equal.
[0009] The distance of the two side vertical walls of the primary refractory layer gradually increases from the hot metal contact surface to the side connected with the high-grade recycled material support layer.
[0010] The included angle A of the primary refractory layer side vertical wall and the hot metal contact surface of the novel smelting iron brick is 96°-100°.
[0011] The technical scheme of the utility model has the following beneficial technical effects:
[0012] 1. Compared with some iron ladle bricks that use ordinary recycled materials, this utility model uses high-grade recycled materials on the side that is not in contact with molten iron, which improves the safety factor of the iron ladle compared with ordinary waste materials.
[0013] 2. Compared with a system that uses all virgin materials, this utility model adopts a composite structure, and the high-grade recycled material support layer is made of recycled materials, which is beneficial to the large-scale consumption of recycled solid waste refractory materials and effectively reduces the cost of the product. Attached Figure Description
[0014] Figure 1 A three-dimensional structural diagram of this utility model;
[0015] Figure 2 A side view of the structure of this utility model;
[0016] Figure 3 A top view of the structure of this utility model.
[0017] The reference numerals in the figure are: 1-virgin material refractory layer; 2-high-grade recycled material support layer; 3-molten iron contact surface. Detailed Implementation
[0018] The novel iron-making brick in this embodiment, such as Figure 1 As shown, it includes a virgin material refractory layer 1 and a high-grade recycled material support layer 2. The virgin material refractory layer 1 and the high-grade recycled material support layer 2 are tightly bonded together. The side wall of the virgin material refractory layer 1 away from the high-grade recycled material support layer 2 is in contact with molten iron to form a molten iron contact surface 3. The virgin material refractory layer 1 and the high-grade recycled material support layer 2 are pressed into one piece by a 600-ton brick press.
[0019] like Figure 2 As shown, the length a of the high-grade recycled material support layer 2 is less than or equal to 45% of the total length c of the ironmaking brick. Preferably, the length a of the high-grade recycled material support layer 2 accounts for 25% of the total length c of the ironmaking brick. Under the premise of ensuring safe use, this can maximize the amount of recycled material used and reduce costs. The thickness of the high-grade virgin material refractory layer 1 and the high-grade recycled material support layer 2 are equal. The distance between the two side walls of the virgin material refractory layer 1 gradually increases from the iron contact surface 3 to the side connected to the high-grade recycled material support layer 2. The included angle A between the side wall of the virgin material refractory layer 1 and the iron contact surface 3 is 96°-100°, preferably 96°. The high-grade recycled material support layer 2 is a recycled material layer of fallen material, a recycled material layer of scrap material, a recycled material layer of defective material, a recycled material layer of used sliding plate material, or a recycled material layer of used ladle molten pool.
[0020] In actual production, first, the aggregate is stirred in the wet grinder for 3-5 minutes, then the resin is stirred for 5-7 minutes, after the aggregate surface is wetted, the powder is added, and the mixture is mixed for 12-15 minutes, then the mixed semi-finished product is pressed into shape on a 600-ton brick press when the material is difficult to press into shape. When forming, the raw material refractory layer 1 and the high-grade recycled material support layer 2 are respectively placed in the mold, and a baffle is used in the middle to prevent the raw materials from mixing, then the baffle in the mold is removed, and a friction brick press is used for forming.
[0021] The formula of the raw material is: the content of 5-3mm fused white corundum is 25wt%, the content of 3-1mm fused white corundum is 15wt%, the content of 1-0mm fused white corundum is 10wt%, the content of fused white corundum powder is 15wt%, the content of special high-aluminum powder is 10wt%, the content of silicon carbide is 10wt%, the content of graphite is 10wt%, and the content of resin is 5wt%; the specific cost of the raw material is about 4755 yuan / ton, and the cost of the recycled material is about 1500 yuan per ton. In actual manufacturing, more than 20% of the material cost can be saved, and the safety of the ladle can be ensured.
[0022] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.
Claims
1. A novel iron-smelting brick, characterized in that, It includes a virgin material refractory layer (1) and a high-grade recycled material support layer (2), the virgin material refractory layer (1) and the high-grade recycled material support layer (2) are tightly bonded together, and the side wall of the virgin material refractory layer (1) away from the high-grade recycled material support layer (2) is in contact with molten iron to form a molten iron contact surface (3).
2. The novel iron-making brick according to claim 1, characterized in that, The length a of the high-grade recycled material support layer (2) is less than or equal to 45% of the total length c of the blast furnace bricks.
3. The novel iron-making brick according to claim 2, characterized in that, The length a of the high-grade recycled material support layer (2) accounts for 20-35% of the total length c of the ironmaking brick.
4. A novel iron-making brick according to any one of claims 1-3, characterized in that, The high-grade recycled material support layer (2) is a recycled material layer of fallen material, a recycled material layer of scrap material, a recycled material layer of substandard material, a recycled material layer of used skateboard material, or a recycled material layer of used steel ladle molten pool.
5. A novel iron-making brick according to any one of claims 1-3, characterized in that, The thickness of the virgin material refractory layer (1) and the high-grade recycled material support layer (2) are equal.
6. A novel iron-making brick according to any one of claims 1-3, characterized in that, The distance between the two vertical walls of the virgin material refractory layer (1) gradually increases from the molten iron contact surface (3) to the side connected to the high-grade recycled material support layer (2).
7. A novel iron-making brick according to claim 6, characterized in that, The included angle A between the side wall of the virgin material refractory layer (1) and the contact surface (3) of the molten iron is 96°-100°.