Water adding and wetting device on sintering return mine belt weigher

Abstract

The utility model relates to the technical field of smelting equipment of iron and steel plants, in particular to a water adding and wetting device on a sintering return mine belt weigher. The device comprises a water tank, the water tank is provided with a water inlet pipeline, the water inlet pipeline is communicated with a compressed air pipeline, multiple rows of nozzles are arranged below the water tank, and a blow-down valve is arranged below the water tank; the outer surface of the lower portion of the water tank is in a groove shape. The water tank is in a groove shape and can gather and collect water vapor, and the water vapor is prevented from falling on the belt cover to corrode the inner wall of the belt cover in the spraying process. The water tank is provided with a water inlet pipeline and a compressed air pipeline, and the effect of nozzle atomization is achieved by mixing compressed air and water. The blow-down valves of the water tank are arranged at the two ends of the groove shape, impurities in the water tank can be removed regularly, and stable operation of the device is guaranteed. The device improves the pelletizing effect of the uniformly mixed material, improves the air permeability in the sintering process, stabilizes the production order, and ensures that the return mine can be fully wetted in the sintering production process.

Description

Technical Field

[0001] This utility model relates to the technical field of steel plant smelting equipment, specifically a water wetting device for a sintering return ore belt scale. Background Technology

[0002] In existing technologies, sintered ore needs to undergo screening and granulation processes during sintering production to meet the particle size requirements of blast furnace ironmaking. During screening, sintered ore particles smaller than 5mm are screened out; this portion is called return ore. Returned ore particles are particles of a certain size and have a certain temperature. If they are not wetted, they are prone to forming "under-mixed material" when mixed with other raw materials, resulting in poor pelletizing, decreased permeability of the mixture, and increased dust generation at the work site. The returned ore is transported to the returned ore bin via a belt conveyor. The returned ore is then weighed into the sintering raw materials in a certain proportion by a belt scale. As part of the raw materials for sintering production, the returned ore, being particles with a certain particle size, can become the core of the granulation pellets when added to the sintering material and mixed with other materials. This improves the granulation efficiency of the mixture, improves the particle size distribution of the mixture, increases the porosity of the sintering material layer, and allows airflow to pass through the material layer more smoothly, thereby improving the permeability of the sintering material. This provides sufficient oxygen for the redox reaction during the sintering process, which is beneficial to improving the quality and yield of sintered ore.

[0003] During the sintering process, sintering return ore is directly weighed and added to the sintering raw materials via a belt scale without being wetted. Because the return ore is unwetted, although water is added to wet the materials during the raw material mixing and granulation process, the return ore has a certain particle size and temperature, making it difficult to fully wet it during the water mixing and granulation process. As a result, the return ore, as the core of the pelletizing process, cannot adhere well to other materials, leading to poor granulation effect of the mixture, or even existing in its original state. This affects the permeability of the sintering process, reduces production efficiency, and results in insufficient melting during the high-temperature sintering process, reducing the quality of the sintered ore. At the same time, the direct addition of sintering return ore without water wetting also leads to a large amount of dust on site, polluting the environment. Utility Model Content

[0004] The purpose of this invention is to provide a water-adding and wetting device on a sintering return ore belt scale to address the above-mentioned shortcomings. This solves the problem of poor granulation effect of the mixture due to insufficient wetting of the sintering return ore, which affects the air permeability of the sintering process and reduces production efficiency.

[0005] The technical solution of this utility model is: a water-adding and wetting device on a sintering return ore belt scale, including a water tank, the water tank having a water inlet pipe, a compressed air pipe connected to the water inlet pipe, multiple rows of nozzles below the water tank, and a drain valve below the water tank; the lower outer surface of the water tank is trough-shaped, and the drain valve is located at both ends of the trough.

[0006] The above plan also includes:

[0007] The nozzles at both ends of the multi-row nozzles are equipped with regulating valves.

[0008] The multi-row nozzles consist of two rows.

[0009] The advantages of this invention are: 1. The water tank is trough-shaped, which can collect and gather water vapor, preventing water vapor from falling onto the belt cover and corroding the inner wall of the belt cover during spraying. The water tank is equipped with a water inlet pipe and a compressed air pipe, achieving the atomization effect of the nozzle by mixing compressed air with water. The drain valve of the water tank is located at both ends of the trough, which can periodically remove impurities from the water tank and ensure the stable operation of the device. 2. This device improves the pelletizing effect of the mixed material, enhances the air permeability during the sintering process, stabilizes the production order, and ensures that the returned ore can be fully wetted during the sintering production process.

[0010] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a simplified structural diagram of the present invention.

[0012] Figure 2 yes Figure 1 Simplified structural diagram viewed from below.

[0013] The components listed are as follows: 1. Water tank; 2. Water inlet pipe; 3. Compressed air pipe; 4. Nozzle; 5. Drain valve; 6. Regulating valve; 7. Belt scale; 8. Return ore particles. Detailed Implementation

[0014] See Figure 1 , 2 A water-wetting device for a sintering return ore conveyor belt scale includes a water tank 1. The lower outer surface of the water tank 1 is trough-shaped, with a flat bottom and sloping sides. The trough shape helps to collect and gather water vapor, preventing it from falling onto the conveyor belt cover and corroding its inner wall during spraying. The water tank 1 is horizontally positioned above the conveyor belt scale 7. The upper part of the water tank 1 has a water inlet pipe 2, which is connected to a compressed air pipe 3. The atomization effect of the nozzles is achieved by mixing compressed air with water. Adjusting the valve opening ratio on the water inlet pipe 2 and the compressed air pipe 3 can regulate the atomization level. Compressed air and water are mixed in the water inlet pipe 2 before entering the water tank 1. Below the water tank 1 are two rows of nozzles 4. Each nozzle at both ends of the two rows of nozzles 4 has a regulating valve 6, which can adjust the water volume according to the thickness and width of the material surface. The water tank 1 is equipped with a drain valve 5 at the bottom. The drain valve 5 is located at both ends of the tank and can periodically remove impurities from the water tank to ensure the stable operation of the device.

[0015] Instructions for use: This device is installed above the return ore belt scale 7 of the sintering batching. When the return ore is fed in, open the water valve on the water inlet pipe 2 and the air valve on the compressed air pipe 3. The water is then sprayed evenly onto the surface of the return ore particles 8 through the two rows of staggered nozzles 4 below the water tank 1 to wet the particles evenly.

[0016] By studying the changes in width and height of sintered return ore on the belt scale and the dust situation during the feeding process, this device was designed. During the feeding process of sintered return ore, the operators adjust the relevant valves of the device according to the height and width of the return ore on the belt scale 7, so that the return ore is evenly moistened with water in the width and height directions of the belt scale 7. This eliminates the problem of poor granulation effect of the mixture due to insufficient wetting of the return ore, improves the utilization efficiency of the sintering machine and the quality of sintered ore, and improves the on-site environment.

[0017] The above description is merely a specific embodiment of this utility model, and the various examples do not constitute a limitation on the substantive content of this utility model.

Claims

1. A water addition wetting device for a sintered return fines belt scale, characterized in that It includes a water tank (1), the water tank (1) has water inlet pipeline (2), the water inlet pipeline (2) is passed through compressed air pipeline (3), the water tank (1) lower surface has multiple rows of shower nozzle (4), the water tank (1) lower surface has sewage valve (5);The outer surface of the lower part of water tank (1) is groove type, and the sewage valve (5) is arranged at the two ends of the groove type.

2. A water addition wetting device for a sintered return fines belt scale as claimed in claim 1, characterised in that The shower nozzle at the two ends of the multiple rows of shower nozzle (4) is provided with an adjusting valve (6).

3. A water addition wetting device for a sintered return fines belt scale according to claim 1 or 2, characterised in that The multiple rows of shower nozzle (4) are two rows.

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