Rake tooth of multi-hearth roasting furnace

Abstract

The utility model relates to a rake tooth of a multi-hearth roasting furnace. The rake tooth of the multi-hearth roasting furnace comprises a butterfly blade, a bowl opening, a connecting rib plate, a connecting bolt and a tooth sheet, the bowl opening is welded to the center of the front face of the butterfly leaf, the connecting rib plate is welded to the back face of the butterfly leaf, and the connecting rib plate and the tooth piece are fixedly connected through the connecting bolt. And the rake tooth main body is formed by processing stainless steel. According to the rake tooth of the multi-hearth roasting furnace, the tooth pieces are connected through the bolts, so that the tooth pieces of different specifications are convenient to disassemble, assemble and replace; and when the rake teeth are subjected to larger resistance due to the accumulation of bonding materials in the multi-hearth furnace, the tooth sheets can be spontaneously deformed and even broken, so that the rake arms are protected from being damaged, and the cost of spare parts and the maintenance cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of multi-chamber roasting furnaces, in particular to a rake tooth of a multi-chamber roasting furnace. Background Art

[0002] The main sources of zinc oxide in a hydrometallurgical zinc smelting plant are obtained by volatilization of leaching slag and fuming of slag from the upper process. Zinc oxide contains a large amount of impurities such as fluorine and chlorine that are harmful to zinc electrolysis. Its main forms are ZnCl2, PbCl2, ZnF2, PbF2, GaF2, NaCl, KCl, etc. At present, it is generally treated by a multi-chamber roasting furnace. Relying on the volatilization reaction of fluorides and chlorides, under high temperature conditions in the furnace, low-boiling fluorides and chlorides are decomposed into gaseous state, and removed with the flue gas dust removal device. Since the secondary zinc oxide material often contains lead oxide and other molten compounds that are easy to form at a certain temperature, it will form adhesion resistance to the rake teeth, and even cause the rake arm to be twisted off, so that the furnace cannot operate normally and affect production. When using a multi-chamber roasting furnace to treat other materials, such as molybdenite desulfurization, there is a similar situation. The material forms an easy-to-bond state at a certain temperature and adheres to the rake teeth. When a traditional multi-chamber furnace encounters a similar situation, the only measure is to stop the furnace for maintenance and manually clean the materials on the rake teeth. However, when the furnace is shut down to find the problem, it is very likely that the rake arm has been broken or even the center axis has been damaged, which not only seriously affects production efficiency, but also requires additional equipment replacement costs. Utility Model Content

[0003] Based on this, the purpose of the utility model is to provide a multi-chamber roasting furnace rake tooth.

[0004] A multi-chamber roasting furnace rake tooth comprises a butterfly leaf, a bowl mouth, a connecting rib plate and a tooth piece; the bowl mouth is welded to the center of the front side of the butterfly leaf, the connecting rib plate is welded to the back side of the butterfly leaf, and the tooth piece is fixedly connected to the connecting rib plate.

[0005] The multi-chamber roasting furnace rake teeth described in the utility model are provided with connecting ribs, so that the tooth pieces originally directly welded to the butterfly leaves are fixedly connected to the connecting ribs, and the tooth pieces can be broken by themselves when subjected to large external forces, so as to avoid the rake arms being twisted off by excessive bonding resistance. In addition, since the tooth pieces are fixedly connected instead of welded, the tooth pieces can be easily replaced when they are damaged or other types of tooth pieces are needed. The modular design of separating the tooth pieces can effectively reduce the production cost and spare parts storage cost.

[0006] Furthermore, it also includes connecting bolts, which connect and fix the connecting rib plate and the tooth piece. The connecting tooth piece and the connecting rib plate are fixed by connecting bolts, which is convenient for installation and disassembly, and different specifications of bolts can be selected according to production needs to meet different resistance sizes.

[0007] Furthermore, the butterfly leaf is made of 316L stainless steel, has a butterfly-shaped structure, and has smooth surfaces on both sides. The use of 316L stainless steel improves the strength and corrosion resistance of the butterfly leaf.

[0008] Furthermore, the bowl mouth is made of 316L stainless steel, with a bowl-shaped structure, the top diameter is larger than the bottom diameter, the top of the bowl mouth is provided with a mounting opening for mounting on the rake arm of a multi-chamber roasting furnace, and the bottom of the bowl mouth is welded to the front center of the butterfly leaf. The use of 316L stainless steel improves the strength and corrosion resistance of the bowl mouth.

[0009] Furthermore, the tooth piece is made of 304 stainless steel. The tooth piece uses 304 stainless steel with slightly lower strength, and can spontaneously deform when subjected to greater resistance to protect the rake arm.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The rake teeth are changed from the existing cast iron material to stainless steel, which improves the strength and corrosion resistance of the rake teeth.

[0012] 2. The gear piece adopts modular design, which changes from replacing the whole rake tooth to only replacing the gear piece, which is convenient for disassembly and installation. And because the replacement part changes from the whole rake tooth to a single gear piece, the spare parts cost and storage cost are greatly reduced.

[0013] 3. The existing teeth are welded on the butterfly leaves and adjusted so that the teeth are connected to the ribs by bolts, so that the teeth are deformed and broken when they encounter greater resistance, which can reduce the resistance of the rake arm and protect the rake arm from damage.

[0014] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the rake teeth of the multi-chamber roasting furnace of the utility model;

[0016] Figure 2 It is a side view of the rake teeth of the multi-chamber roasting furnace of the utility model;

[0017] Figure 3 It is a rear view of the rake teeth of the multi-chamber roasting furnace of the utility model;

[0018] Figure 4 It is a cross-sectional view of the rake teeth of the multi-chamber roasting furnace of the utility model along the BB direction. DETAILED DESCRIPTION

[0019] See also Figure 1-4A multi-chamber roasting furnace rake tooth, comprising a butterfly leaf 1, a bowl mouth 2, a connecting rib plate 3, a connecting bolt 4 and a tooth piece 5. The bowl mouth 2 is welded to the center of the front of the butterfly leaf 1, the connecting rib plate 3 is welded to the back of the butterfly leaf 1, and the connecting bolt 4 fixes the connecting rib plate 3 and the tooth piece 5.

[0020] The butterfly leaf 1 is made of 316L stainless steel, which can improve the strength and corrosion resistance of the butterfly leaf 1 and is not easy to be damaged. The butterfly leaf 1 is a butterfly-shaped structure, and the front and back sides are smooth planes to reduce the adhesion of bonding materials.

[0021] The bowl mouth 2 is made of 316L stainless steel, which can improve the strength and corrosion resistance of the bowl mouth 2 and is not easy to break. The bowl mouth 2 is a bowl-shaped structure, and the top diameter is larger than the bottom diameter. A mounting opening is opened at the top of the bowl mouth 2 for mounting on the rake arm of a multi-chamber roasting furnace; the bottom of the bowl mouth 2 is welded to the front center of the butterfly leaf 1.

[0022] The connecting rib plate 3 is a plate-shaped metal, and the two ends are folded inwards by 90 degrees to form a structure similar to a bracket. Two screw holes are provided in the middle of the connecting rib plate 3 for accommodating the connecting bolts 4.

[0023] The tooth piece 5 is made of 304 stainless steel with a slightly lower strength so as to be able to deform spontaneously when subjected to greater resistance. The shape and thickness of the tooth piece 5 can be adjusted according to actual production requirements.

[0024] When in use, select a suitable tooth piece 5 according to the needs, fix it with the connecting rib plate 3 through the connecting bolt 4, and then align the bowl mouth 2 and install it on the rake arm. During the operation of the multi-chamber furnace, since the rake teeth are made of stainless steel, the surface is relatively smooth, which can reduce the adhesion of materials to a certain extent. Even in the case of material adhesion, the large resistance generated by the bonding material will cause the tooth piece to deform or break, which has no effect on the rake arm and the multi-chamber furnace, and does not require special shutdown for maintenance. The damaged tooth piece can be replaced after the operation stops.

[0025] In other embodiments, the tooth piece 5 is connected to the connecting rib plate 3 by a snap connection. Preferably, the connecting rib plate 3 is provided with a snap opening, and the tooth piece 5 is provided with a snap buckle matched therewith.

[0026] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A multi-chamber roasting furnace rake, characterized in that: It includes a butterfly leaf, a bowl mouth, a connecting rib plate and a tooth piece; the bowl mouth is welded to the center of the front side of the butterfly leaf, the connecting rib plate is welded to the back side of the butterfly leaf, and the tooth piece is fixedly connected to the connecting rib plate.

2. A multi-chamber roasting furnace rake according to claim 1, characterized in that: It also includes connecting bolts, which are used to connect and fix the connecting rib plate and the tooth piece.

3. A multi-chamber roasting furnace rake according to any one of claims 1 or 2, characterized in that: The front and back surfaces of the butterfly leaf are smooth planes.

4. A multi-chamber roasting furnace rake according to any one of claims 1 or 2, characterized in that: The bowl mouth is a bowl-shaped structure, with a top diameter larger than a bottom diameter, and the bottom of the bowl mouth is welded to the center of the front side of the butterfly leaf.

5. The multi-chamber roasting furnace rake according to claim 4, characterized in that: The top of the bowl mouth is provided with a mounting opening for mounting on a rake arm of a multi-chamber roasting furnace.

6. The multi-chamber roasting furnace rake according to claim 1, characterized in that: The tooth piece is connected to the connecting rib plate by clamping.

7. The multi-chamber roasting furnace rake according to claim 6, characterized in that: The connecting rib plate is provided with a bayonet, and the tooth piece is provided with a buckle matched therewith.

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