Novel fuming furnace bottom structure

Abstract

The utility model relates to a novel fuming furnace bottom structure, which belongs to the technical field of fuming furnace bottom structures and comprises a frame beam structure, refractory bricks are arranged on the outer side and the inner side of the frame beam structure, and a water jacket is fixedly connected to the top of the frame beam structure. Refractory castable is arranged on the upper portion and the lower portion of the frame beam structure and the inner sides of the refractory bricks, and reinforcing ribs used for enhancing the overall strength are fixedly connected to the inner side of the frame beam structure. According to the novel furnace bottom structure of the fuming furnace, explosion accidents caused by burning loss and water leakage of the water jacket due to direct contact of slag after the refractory bricks are ablated with the water jacket can be effectively avoided, so that the fuming furnace runs more safely and stably, accumulated materials at the furnace bottom are more convenient to clean during maintenance each time, and a user does not need to worry that the water jacket is damaged by an air pick; after the accumulated materials and the refractory bricks at the furnace bottom are cleaned, whether the refractory castable at the furnace bottom needs to be rammed again or not is checked, the refractory bricks are built again, and then the water jacket can be maintained, so that the maintenance is simple, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of furnace bottom structure of fuming furnace, specifically a novel furnace bottom structure for fuming furnace. Background Technology

[0002] A fuming furnace is a device used to process liquid slag. It is mainly used to volatilize valuable metals in the slag in the form of metals, oxides, or sulfides. It adopts an oxygen-enriched side-blowing + fuming reduction process to harmlessly dispose of smelting waste slag. It is a process in which smelting waste slag with low lead and zinc content is smelted at high temperature and desulfurized, and then the slag is put into the fuming furnace for further reduction, volatilization, recovery and enrichment of zinc-containing dust. It is an intermittent operation. During operation, the temperature inside the fuming furnace reaches 1200-1300℃. At the same time, high-pressure air mixed with pulverized coal is blown into the fuming furnace, which makes the high-temperature slag violently turbulent in order to complete various metallurgical reactions.

[0003] Currently, the existing furnace bottom structure of fuming furnaces generally uses a steel water jacket. The main water jacket of the furnace body is built on top of the bottom water jacket, and a layer of refractory bricks is built on top of the bottom water jacket to form a cooling protection for the furnace bottom.

[0004] Because the slag has a high lead content, and lead has a low melting point and good fluidity, it can easily penetrate into the gaps in the refractory bricks, causing the refractory bricks to expand, erode, and be damaged. In addition, the impact of slag feeding into the fuming furnace and the violent churning and scouring of the boiling slag cause the refractory bricks at the bottom of the furnace to be damaged quickly. When the bottom bricks are completely eroded, the slag will directly contact the water jacket at the bottom of the furnace. Due to the blowing characteristics of the fuming furnace, the slag covers the bottom of the furnace, forming a slag zone, and it is impossible to directly monitor the damage to the water jacket. When the water jacket is damaged and leaks water, the high-temperature slag carrying some matte will expand rapidly upon contact with water and release heat, which may cause an explosion, posing a huge safety risk. Therefore, a new type of fuming furnace bottom structure is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a novel furnace bottom structure for a fuming furnace. This solves the problem that due to the blowing characteristics of the fuming furnace, molten slag covers the furnace bottom, forming a slag zone. This makes it impossible to visually monitor the damage to the water jacket. When the water jacket is damaged and leaks water, the high-temperature molten slag carrying some matte expands rapidly upon contact with water, releasing heat and potentially causing an explosion, posing a significant safety risk.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel furnace bottom structure for a fuming furnace, comprising a frame beam structure, wherein refractory bricks are provided on both the outer and inner sides of the frame beam structure, a water jacket is fixedly connected to the top of the frame beam structure, and refractory castable is provided on both the upper and lower parts of the frame beam structure and the inner side of the refractory bricks.

[0007] Furthermore, the inner side of the frame beam structure is fixedly connected with reinforcing ribs to enhance the overall strength.

[0008] Furthermore, the refractory bricks on the inner side of the frame beam structure are laid in a one-vertical-three-horizontal-laying method, with a 1mm anti-expansion gap reserved between them.

[0009] Furthermore, the water jacket is made of magnesium chromium refractory castable.

[0010] Furthermore, the frame beam structure is a steel structure.

[0011] Furthermore, a trapezoidal inlay groove for positioning refractory bricks is provided on the inner side of the water jacket.

[0012] Furthermore, a water jacket clamp is fixedly connected to the outside of the water jacket to enhance structural stability.

[0013] Furthermore, expansion indicators for monitoring the expansion of objects are provided around the support beams of the frame beam structure.

[0014] Compared with the prior art, this utility model provides a novel furnace bottom structure for a fuming furnace, which has the following beneficial effects:

[0015] 1. The new furnace bottom structure of the fuming furnace can effectively prevent the molten slag from directly contacting the water jacket after the refractory bricks are eroded, which could lead to water jacket burnout and leakage, and thus cause an explosion. This makes the operation of the fuming furnace safer and more stable. It is also more convenient to clean the accumulated material at the bottom of the furnace during each maintenance. There is no need to worry about the pneumatic hammer damaging the water jacket. After cleaning the accumulated material and refractory bricks at the bottom of the furnace, the water jacket can be maintained by checking whether the refractory castable at the bottom of the furnace needs to be re-tamped and re-laid with refractory bricks. This makes the maintenance simple and low-cost.

[0016] 2. The new type of furnace bottom structure of the fuming furnace has significantly improved the erosion and ablation resistance of the furnace bottom through the use of reinforcing ribs, frame beam structure, refractory castable and refractory brick combination masonry method, and calculation of refractory expansion value, which enhances the overall structural strength of the furnace and improves its service life. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a top view of the structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural view of the water jacket clamp of this utility model.

[0020] In the diagram: 1. Frame beam structure, 2. Refractory bricks, 3. Water jacket, 4. Refractory castable, 5. Reinforcing ribs, 6. Trapezoidal inlay groove, 7. Water jacket clamp, 8. Expansion indicator. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figures 1 to 2 This embodiment describes a novel bottom structure for a fuming furnace. The novel bottom structure for a fuming furnace includes a frame beam structure 1. Refractory bricks 2 are provided on both the outer and inner sides of the frame beam structure 1. A water jacket 3 is fixedly connected to the top of the frame beam structure 1. Refractory castable 4 is provided on both the upper and lower parts of the frame beam structure 1 and the inner side of the refractory bricks 2.

[0024] In this embodiment, a reinforcing rib 5 is fixedly connected to the inner side of the frame beam structure 1 to enhance the overall strength.

[0025] It should be noted that the refractory bricks 2 on the inner side of the frame beam structure 1 are laid in a one-vertical-three-horizontal-laying method, and a 1mm anti-expansion gap is reserved between them.

[0026] It should be understood that the water jacket 3 is made of magnesium chromium refractory castable, and the frame beam structure 1 is a steel structure.

[0027] In this embodiment, the bottom water jacket of the fuming furnace is innovatively improved to be made of magnesium chromium refractory castable, which has a refractory temperature of up to 1500℃ or above and excellent slag erosion resistance and thermal shock resistance. This enables it to effectively prevent molten slag penetration and fully meet the high temperature resistance requirements of the bottom of the fuming furnace. It can replace the bottom water jacket to protect the bottom of the furnace. In this way, even if the refractory brick 2 is completely eroded and the molten slag comes into direct contact with the bottom castable, there is no risk of explosion, which greatly improves the safety and stability of the fuming furnace operation.

[0028] In this embodiment, by combining the reinforcing ribs 5, frame beam structure 1, refractory castable 4 and refractory bricks 2 in a masonry method, and by calculating the expansion value of the refractory materials, the erosion resistance and ablation resistance of the furnace bottom of the fuming furnace are greatly improved, thereby enhancing the overall structural strength of the furnace and increasing its service life.

[0029] Example 2:

[0030] Please see Figure 1 and Figure 3 Based on the first embodiment, a trapezoidal inlay groove 6 for positioning the refractory brick 2 is provided on the inner side of the water jacket 3.

[0031] Among them, the outer side of the water jacket 3 is fixedly connected with a water jacket clamp 7 to enhance the structural stability.

[0032] In addition, expansion indicators 8 are installed around the supporting beams of the frame beam structure 1 to monitor the expansion of the object.

[0033] The working principle of the above embodiments is as follows:

[0034] The bottom water jacket of the fuming furnace is innovatively improved by using magnesia-chromium refractory castable, which has a refractory temperature of up to 1500℃ or above and excellent slag erosion resistance and thermal shock resistance. It can effectively prevent molten slag penetration and fully meet the high temperature resistance requirements of the fuming furnace bottom, thus replacing the bottom water jacket to protect the furnace bottom. In this way, even if the refractory bricks 2 are completely eroded and the molten slag comes into direct contact with the bottom castable, there is no risk of explosion, which greatly improves the safety and stability of the fuming furnace operation. A self-made single-layer integrated I-beam frame support beam, namely the frame beam structure 1, is used. Each water jacket 3 in the first layer of the fuming furnace is externally supported by an additional support, and water jacket clamps 7 are made and installed to enhance its structural stability. Expansion indicators 8 are set around the support beam of the frame beam structure 1 to monitor the expansion of the object. The inner refractory bricks 2 are laid in a one-vertical-three-horizontal masonry method, with a 1mm anti-expansion gap between them to improve the service life of the refractory bricks 2. The outer perimeter is then fully masonry with refractory bricks 2 to form double protection for the frame beam structure 1. Finally, refractory castable 4 is used for filling and protection.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel furnace bottom structure for a fuming furnace, comprising a frame beam structure (1), characterized in that: The frame beam structure (1) is provided with refractory bricks (2) on both the outside and inside. A water jacket (3) is fixedly connected to the top of the frame beam structure (1). Refractory castable (4) is provided on both the upper and lower parts of the frame beam structure (1) and the inside of the refractory bricks (2).

2. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The inner side of the frame beam structure (1) is fixedly connected with reinforcing ribs (5) to enhance the overall strength.

3. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The refractory bricks (2) inside the frame beam structure (1) are constructed using a vertical and three horizontal masonry method, with a 1mm anti-expansion gap reserved between them.

4. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The water jacket (3) is a magnesium chromium refractory castable.

5. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The frame beam structure (1) is a steel structure.

6. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The water jacket (3) has a trapezoidal inlay groove (6) for positioning the refractory brick (2) on its inner side.

7. The novel furnace bottom structure of a fumigation furnace according to claim 1, characterized in that: The water jacket (3) is fixedly connected to a water jacket clamp (7) to enhance structural stability.

8. The novel furnace bottom structure of a fuming furnace according to claim 1, characterized in that: The frame beam structure (1) has expansion indicators (8) around its supporting beams for monitoring the expansion of objects.

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