A method of water addition to eliminate sticking in a mixer

Abstract

The application discloses a water adding method for eliminating material sticking of a mixer and relates to a sintering production process. The water outlet direction of a water spraying pipe is adjusted to be towards the inner wall of the mixer which is opposite to the material lifting direction of the material lifting surface, the water spraying pipe sprays the mixing water to the raw materials and the corresponding inner wall of the mixer in a half-cone spraying mode, and a flowing water film is formed on the corresponding inner wall of the mixer. The application not only improves the production efficiency of the sintering furnace, but also reduces the labor intensity of workers and the safety risk coefficient.

Description

Technical Field

[0001] This invention relates to sintering production processes, and more specifically, to a water addition method for eliminating material sticking in a mixer. Background Technology

[0002] One step in the iron ore processing of steel enterprises is the sintering of iron ore powder using a sintering machine. During sintering, the overall sintering basicity of the raw materials needs to be adjusted to 1.9-2.0; the proportion of refined powder in the raw materials is approximately 20%, and the proportion of quicklime is approximately 4.92%. After the raw materials are fed into the sintering machine according to the specified proportions, they are mixed through a mixer within the machine. During the mixing process, water is added to moisten the raw materials and ensure they are thoroughly mixed.

[0003] When adding water to the raw materials in a mixer, it is usually added towards the conveying surface. As the water and raw materials enter the mixer and are agitated, the viscosity of the water-soaked materials increases, especially the materials on the side of the mixer opposite to the conveying direction. This leads to severe material adhesion to the inner wall of that side of the mixer. Over time, the material becomes increasingly sticky, frequently causing the mixer to overheat and be forced to shut down for cleaning. Because this problem is common in mixers, most current mixers are semi-enclosed, meaning they are not completely sealed. Looking down at the mixer, the internal agitator shaft is visible. This type of mixer facilitates internal cleaning. Since the agitator shaft is close to the inner wall, cleaning the adhered material is primarily done manually. However, this method carries significant safety risks and requires considerable physical exertion, making cleaning tasks quite demanding for production workers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a water addition method to eliminate material sticking in the mixer, which not only improves the production efficiency of furnace sintering, but also reduces the labor intensity of workers and lowers the safety risk factor.

[0005] The present invention discloses a water addition method for eliminating material sticking in a mixer. The water outlet direction of the water spray pipe is adjusted to face the inner wall of the mixer opposite to the material lifting direction of the lifting surface. The water spray pipe sprays water for mixing onto the raw materials and the corresponding inner wall of the mixer in a semi-cone spray manner, and forms a flowing water film on the corresponding inner wall of the mixer.

[0006] An upward-extending baffle is provided on the side wall of the mixer opposite to the material lifting direction of the lifting surface. The water spray pipe is set on the side of the baffle closer to the mixer, and a water mist nozzle that can produce a solid cone effect is installed at the spray nozzle of the water spray pipe.

[0007] A water storage tank is provided between the baffle plate and the side wall surface of the mixer. A water guide is opened below the water storage tank and the water guide is connected to the inner wall of the mixer so that when the water flows out from the water guide, it can flow evenly to the inner wall of the mixer to form a water film.

[0008] There are two water spray pipes.

[0009] The water mist nozzles on the two water spray pipes are arranged in a staggered manner.

[0010] A dry material mixing section is provided between the feed end of the mixer and the end of the water spray pipe near the feed end of the mixer.

[0011] A transition mixing section is provided between the discharge end of the mixer and the end of the water spray pipe near the discharge end of the mixer.

[0012] Beneficial effects

[0013] The advantages of this invention are as follows: Water is sprayed in a semi-cone shape onto the raw material in the opposite direction of the lifting surface, allowing the water to be sprayed onto the surface of the raw material. However, as the mixer operates, the raw material and the water on its surface are carried to the lifting surface, causing the material and water to disperse, thus achieving the same effect of thoroughly wetting the raw material. Furthermore, the sprayed water can also be sprayed onto the inner wall of the mixer, forming a water film along the inner wall to reduce the adhesion of the mixer's inner wall. This effectively prevents severe material adhesion on the inner wall of the mixer in the opposite direction of the lifting surface, solving the problem of excessive current and forced shutdown for cleaning due to severe material adhesion. This not only improves the production efficiency of furnace sintering but also reduces the labor intensity of workers and lowers the safety risk factor. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of the mixer of the present invention (stirring shaft and raw materials are not shown);

[0015] Figure 2 This is a partial cross-sectional view of the side structure of the mixer of the present invention.

[0016] Among them: 1-mixer, 2-spray pipe, 3-water mist nozzle, 4-baffle plate, 5-water storage tank, 6-water guide. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0018] See Figures 1-2This invention discloses a water addition method for eliminating material adhesion in a mixer. The water outlet direction of the water spray pipe 2 is adjusted to face the inner wall of the mixer 1, opposite to the material lifting direction of the lifting surface. This allows the water spray pipe 2 to spray water onto the raw materials and the corresponding inner wall of the mixer 1 in a semi-cone spray pattern, forming a flowing water film on the inner wall. By spraying water in a semi-cone pattern onto the raw materials opposite to the lifting direction of the lifting surface, the water is sprayed onto the surface of the raw materials. However, as the mixer 1 operates, the raw materials and the water on their surface are carried to the lifting surface, causing the materials and water to disperse, thus achieving sufficient wetting of the raw materials. The sprayed water can also be sprayed onto the inner wall of the mixer 1, forming a water film along the inner wall to reduce the adhesion of the inner wall. This effectively prevents severe material adhesion on the inner wall of the mixer opposite to the lifting direction of the lifting surface, solving the problem of excessive current and forced shutdown for cleaning caused by severe material adhesion in the mixer 1. This not only improves the production efficiency of furnace sintering but also reduces the labor intensity of workers and lowers the safety risk factor. Furthermore, because the water film flowing along the inner wall of mixer 1 moves in the opposite direction to the direction of movement, when the water comes into contact with the raw materials, it will move along with the materials and wet them. Therefore, the water used to generate the water film is ultimately added to the raw materials and does not affect the wetting and mixing effect of the raw materials.

[0019] In this invention, to achieve a semi-cone spraying effect, an upwardly extending baffle plate 4 is provided on the side wall of the mixer 1 opposite to the material lifting direction of the lifting surface. A water spray pipe 2 is positioned on the side of the baffle plate 4 closest to the mixer 1, and a water mist nozzle 3 capable of producing a solid cone effect is installed at the spray nozzle of the water spray pipe 2. The baffle plate 4 obstructs the water mist, causing it to spray in a semi-cone shape. The purpose of using a semi-cone spraying method is to ensure that while a water film is formed on the inner wall of the mixer 1, the water is also more evenly and quickly wetted, ensuring mixing efficiency.

[0020] Regarding the configuration of the water spray pipes 2, this embodiment uses a combination of two water spray pipes 2 to add water to the raw materials in the mixer 1. The two water spray pipes 2 are suspended above the mixer 1 by steel cables, and the water mist nozzles 3 on the two water spray pipes 2 are staggered. The spacing between the water mist nozzles 3 on each water spray pipe 2 can be set to 0.6 meters. Furthermore, a dry material mixing section is provided between the feed end of the mixer 1 and the end of the water spray pipe 2 near the feed end of the mixer 1, so that different types of raw materials can be initially mixed before water is added. The dry material mixing section can be set to 1 meter. A transition mixing section is provided between the discharge end of the mixer 1 and the end of the water spray pipe 2 near the discharge end of the mixer 1. No water is added to the raw materials in the transition mixing section, and its length can be set to 1.5 meters.

[0021] To ensure a uniform water film formed on the inner wall of the mixer 1, a water storage tank 5 is provided between the baffle plate 4 and the side wall surface of the mixer 1. The length of the water storage tank 5 is the same as the length of the spray pipe 2. A water guide 6 is provided below the water storage tank 5 and is connected to the inner wall of the mixer 1 so that water flowing out from the water guide 6 can flow evenly to the inner wall of the mixer 1 to form a uniform water film.

[0022] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for adding water to eliminate sticky materials in a mixer, characterized in that, Adjust the water outlet direction of the water spray pipe (2) to face the inner wall of the mixer (1) opposite to the material lifting direction of the lifting surface, so that the water spray pipe (2) sprays the mixing water onto the raw materials and the corresponding inner wall of the mixer (1) in a semi-cone spraying manner, and forms a flowing water film on the corresponding inner wall of the mixer (1). An upward-extending baffle plate (4) is provided on the side wall of the mixer (1) opposite to the lifting direction of the lifting surface. The water spray pipe (2) is set on the side of the baffle plate (4) close to the mixer (1). A water mist nozzle (3) that can produce a solid cone effect is installed at the spray nozzle of the water spray pipe (2). A water storage tank (5) is provided between the baffle plate (4) and the side wall surface of the mixer (1). A water guide (6) is opened below the water storage tank (5) and the water guide (6) is connected to the inner wall of the mixer (1) so that when the water flows out from the water guide (6), it can flow evenly to the inner wall of the mixer (1) to form a water film.

2. The water addition method for eliminating material sticking in a mixer according to claim 1, characterized in that, There are two water spray pipes (2).

3. The water addition method for eliminating material sticking in a mixer according to claim 2, characterized in that, The water mist nozzles (3) on the two water spray pipes (2) are arranged in a staggered manner.

4. A method for adding water to eliminate sticky material in a mixer according to any one of claims 1-3, characterized in that, A dry material mixing section is provided between the feed end of the mixer (1) and the end of the water spray pipe (2) near the feed end of the mixer (1).

5. A method for adding water to eliminate sticky material in a mixer according to any one of claims 1-3, characterized in that, A transition mixing section is provided between the discharge end of the mixer (1) and the end of the water spray pipe (2) near the discharge end of the mixer (1).

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