Novel iron powder crusher for acid regeneration roasting furnace

Abstract

The utility model discloses a novel iron powder crusher for an acid regeneration roasting furnace, which relates to the technical field of machinery and comprises a power device, an iron powder crushing chamber, a bearing bracket, a bearing seat, a crushing shaft, a crushing hammer, a bearing seat quick-release adjusting cushion block and radiating fins, two crushing shafts are arranged in the iron powder crushing chamber, and crushing hammers are arranged on the crushing shafts; two ends of the crushing shaft extend out of the iron powder crushing chamber, one end is mounted in one supporting bearing, and the other end penetrates through the other supporting bearing and is connected with a power device; the supporting bearing is mounted on the bearing seat, the bearing seat is supported by the bearing bracket, and the bearing seat quick-release adjusting cushion block is arranged between the bearing seat and the bearing bracket; and cooling fins are arranged on the crushing shaft. The utility model can solve the problems of low bearing strength, short service life, high failure rate and difficulty in maintenance, disassembly and assembly due to high temperature of iron powder, large load during crushing and high temperature when the iron powder is transmitted to the bearing on the crushing shaft in the conventional iron powder crusher.

Description

Technical Field

[0001] This utility model relates to the technical field of acid regeneration roasting furnace in the metallurgical industry, and in particular to a crusher for crushing iron powder in an acid regeneration roasting furnace. Background Technology

[0002] Most cold-rolled strip mills currently have pickling-rolling mill combined production lines, equipped with a pickling waste acid spray roasting regeneration system. For example, the applicant's cold-rolled strip mill currently has one domestically integrated 1550mm and one 1250mm pickling-rolling mill combined production line, equipped with a 10m... 3 / hour, 5m 3 Two sets of acid spray roasting regeneration systems with a processing capacity of / hour are required. The waste acid processing volume is large, and the iron powder output from the roasting furnace is high. The iron powder, after roasting and agglomeration, must be crushed by an iron powder crusher at the furnace bottom before being discharged to the iron powder silo through a rotary discharge valve with a sealing function at the furnace bottom. The temperature at the furnace bottom reaches approximately 500-600 degrees Celsius. The old crusher has the following two problems: 1. Due to the high temperature of the iron powder and the heavy load during crushing, the temperature transmitted to the bearings on the crushing shaft is approximately 120-180 degrees Celsius. The original bearings required high-temperature resistant bearings, which were expensive, had low strength, short lifespan, and a high failure rate. 2. The original bearing housing design rested directly on the base. When the bearing was damaged, the upper housing needed to be opened, but the clearance between the bearing edge and the lower housing was small, making disassembly difficult, especially since the bearing was tightly clamped. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of iron powder crusher for acid regeneration roasting furnace. It can solve the problems of existing iron powder crushers, which have low bearing strength, short life, high failure rate and difficult maintenance and disassembly due to the high temperature of iron powder, high load during crushing and high temperature transmitted to the bearing on the crushing shaft.

[0004] To solve the above problems, the technical solution of this utility model is as follows: This novel iron powder crusher for acid regeneration roasting furnace includes a power unit, an iron powder crushing chamber, a bearing support, a bearing seat, a crushing shaft, crushing hammers, a quick-release adjusting pad for the bearing seat, and heat sinks; two crushing shafts are arranged side by side at intervals within the iron powder crushing chamber, and the crushing hammers are mounted on the crushing shafts; both ends of the crushing shafts extend out of the iron powder crushing chamber, one end is installed in a support bearing within a bearing seat, and the other end passes through another support bearing at the same end, with the end connected to the power unit; the support bearing is mounted on the bearing seat, and the bearing seat is supported by the bearing support; a quick-release adjusting pad for the bearing seat is provided between the bearing seat and the bearing support; the heat sinks are provided on the section of the crushing shaft between the bearing seat and the iron powder crushing chamber.

[0005] A more specific embodiment of the above technical solution is as follows: the power unit includes a motor, a reducer, a sleeve roller chain, a small sprocket, and a large sprocket; the motor drives the reducer, the output end of the reducer drives the small sprocket, and the small sprocket drives the large sprocket mounted on the ends of the two crushing shafts through the sleeve roller chain, thereby driving the two crushing shafts to rotate in opposite directions, and the crushing hammers on the crushing shafts perform crushing operations to break up the iron powder lumps that have been calcined and agglomerated in the calcination furnace.

[0006] Furthermore, the heat sink is made of high-efficiency heat-dissipating aluminum alloy.

[0007] Furthermore: the quick-release adjusting shim of the bearing housing is made of Q235 and has a thickness of 40 mm.

[0008] Furthermore, the specification and model of the support bearing is a double-row radial spherical roller bearing 22214.

[0009] Furthermore: the top surface of the iron powder crushing chamber is the feed inlet of the crusher, and the bottom is provided with a discharge outlet; the feed inlet on the top surface of the iron powder crushing chamber is connected to the bottom of the acid regeneration roasting furnace through a connecting flange.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0011] 1. This utility model equips the crusher shaft with heat sinks. Most of the heat in the core working area of ​​the crusher is dissipated to the environment by the heat sinks before being conducted to the support bearing. The temperature of the support bearing on the crusher shaft is below 80 degrees Celsius. The original high-temperature bearing can be replaced with an ordinary bearing, which increases the strength and greatly reduces bearing failure. The bearing service life can reach more than one year, achieving stable furnace conditions, reducing consumption, saving energy and improving production efficiency.

[0012] 2. This utility model installs a pad under the bearing seat of the crusher shaft. When replacing the bearing, the pad can be removed first to ensure sufficient height to remove the entire bearing seat. This makes maintenance and disassembly convenient, reduces the labor intensity of maintenance personnel, and avoids personnel working for a long time in high temperature and dusty environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main view of this utility model;

[0014] Figure 2 yes Figure 1 Partial schematic diagram of the cross section along the AA line in the middle;

[0015] Figure 3 This is a top view of the present invention;

[0016] Figure 4 yes Figure 3A schematic diagram of the K-direction after the speed reducer is removed.

[0017] The numbers in the diagram represent: 1-motor, 2-iron powder crushing chamber, 3-bearing support, 4-bearing housing, 5-sleeve roller chain, 6-small sprocket, 7-large sprocket, 8-crushing shaft, 9-bearing housing quick-release adjusting pad, 10-heat sink, 11-crushing hammer, 12-reducer. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 , Figure 2 , Figure 3 and Figure 4 The new type of acid regeneration roasting furnace iron powder crusher includes a power unit, an iron powder crushing chamber 2, a bearing support 3, a bearing seat 4, a crushing shaft 8, a bearing seat quick-release adjustment pad 9, a heat sink 10, and a crushing hammer 11. The top surface of the iron powder crushing chamber 2 is the feed inlet of the crusher, which is connected to the bottom of the acid regeneration roasting furnace via a connecting flange. The bottom of the iron powder crushing chamber 2 is provided with a discharge outlet. Two crushing shafts 8 are arranged side by side at intervals inside the iron powder crushing chamber 2, and crushing hammers 11 are installed on the crushing shafts 8. Both ends of the crushing shafts 8 extend out of the iron powder crushing chamber 2. One end is installed in a support bearing in a bearing seat 4, and the other end passes through another support bearing and is connected to the power unit. The support bearing is installed on the bearing seat 4, which is supported by the bearing bracket 3. A bearing seat quick-release adjustment shim 9 is provided between the bearing seat 4 and the bearing bracket 3. The bearing seat quick-release adjustment shim 9 is made of Q235. A heat sink 10 is provided on the section of the crushing shaft 8 between the bearing seat 4 and the iron powder crushing chamber 2. The heat sink 10 is made of high-efficiency heat-dissipating aluminum alloy.

[0020] The power unit includes a motor 1, a reducer 12, a sleeve roller chain 5, a small sprocket 6, and a large sprocket 7. The motor 1 drives the reducer 12, and the output end of the reducer 12 drives the small sprocket 6, which in turn drives the large sprocket 7 mounted on the ends of the two crushing shafts 8 via the sleeve roller chain 5. The two crushing shafts 8 rotate in opposite directions, and the crushing hammers 11 on the shafts perform the crushing operation, breaking up the iron powder lumps that have agglomerated in the roasting furnace. The iron powder enters the feed inlet of the iron powder crushing chamber 2 from the bottom of the acid regeneration roasting furnace, and after crushing, it falls from the discharge outlet into the air conveying pipe for cooling and is transported to the iron powder silo. Because heat sinks are installed on the crusher shaft, most of the heat in the core working area of ​​the crusher is dissipated into the environment before being conducted to the bearings, reducing the amount of heat transferred from the crushing area to the bearings. This results in excellent heat dissipation during operation, keeping the bearing temperature below 80 degrees Celsius, maintaining the bearing's normal operating temperature, and extending its lifespan. Therefore, the original high-temperature bearing used in the support bearing can be replaced with a standard bearing. The original high-temperature bearing was an imported high-temperature bearing, model 22214E / C4VA210, while the current support shaft uses a standard bearing model 22214, thus strengthening the bearing. The installation pads designed under the crusher shaft bearing housing ensure that the pads can be removed first when replacing the bearing, ensuring sufficient height to remove the entire bearing housing and bearing during online bearing replacement. This significantly reduces the labor intensity of maintenance personnel and avoids prolonged work in high-temperature, dusty environments. This achieves stable furnace conditions, saves energy, and improves production efficiency.

Claims

1. A novel iron powder crusher for an acid regeneration roasting furnace, comprising a power unit, an iron powder crushing chamber (2), a bearing support (3), a bearing seat (4), a crushing shaft (8), and crushing hammers (11), characterized in that: It also includes a bearing seat quick-release adjustment pad (9) and a heat sink (10); two crushing shafts (8) are provided in the iron powder crushing chamber (2), and the crushing hammer (11) is provided on the crushing shaft (8); the two ends of the crushing shaft (8) extend out of the iron powder crushing chamber (2), one end is installed in a support bearing, the other end passes through another support bearing, and the end is connected to the power device; the support bearing is installed on the bearing seat (4), the bearing seat (4) is supported by the bearing support (3), and the bearing seat quick-release adjustment pad (9) is provided between the bearing seat (4) and the bearing support (3); the heat sink (10) is provided on the crushing shaft (8).

2. The novel acid regeneration roasting furnace iron powder crusher according to claim 1, characterized in that: The power unit includes a motor (1), a reducer (12), a sleeve roller chain (5), a small sprocket (6), and a large sprocket (7); the motor (1) is connected to the reducer (12), the output end of the reducer (12) drives the small sprocket (6), and then drives the large sprocket (7) mounted on the ends of the two crushing shafts (8) through the sleeve roller chain (5).

3. The novel acid regeneration roasting furnace iron powder crusher according to claim 1 or 2, characterized in that: The heat sink (10) is made of high-efficiency heat-dissipating aluminum alloy.

4. The novel acid regeneration roasting furnace iron powder crusher according to claim 3, characterized in that: The quick-release adjusting pad (9) of the bearing housing is made of Q235 and has a thickness of 40 mm.

5. The novel acid regeneration roasting furnace iron powder crusher according to claim 4, characterized in that: The support bearing is a double-row radial spherical roller bearing, model 22214.

6. The novel acid regeneration roasting furnace iron powder crusher according to claim 5, characterized in that: The top surface of the iron powder crushing chamber (2) is the feed inlet of the crusher, and the bottom surface is provided with a discharge outlet; the feed inlet on the top surface of the iron powder crushing chamber (2) is connected to the bottom of the acid regeneration roasting furnace through a connecting flange.

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