Large-dosage phosphogypsum water-stable layer production line

Abstract

A large-dosage phosphogypsum water stable layer production line comprises a phosphogypsum powder bin, phosphogypsum powder in the phosphogypsum powder bin is conveyed to a disc granulator through a spiral conveying device, and granulated phosphogypsum aggregate is conveyed to a raw material bin to be stored; the output ends of the raw material bin and the auxiliary material bin are connected to the mixing tank, the output end of the mixing tank is connected to the stirring device, and the stirring device is further connected with a water inlet pipe. The utility model provides a production line for a large-dosage phosphogypsum water-stable layer, which is characterized in that phosphogypsum powder is granulated to form phosphogypsum aggregate, and the phosphogypsum aggregate is used as a main material of the roadbed water-stable layer to manufacture the roadbed water-stable layer. According to the invention, the strength and hardness of a high-dosage phosphogypsum water-stable layer can be improved, the proportion of phosphogypsum can be increased to 75-85%, and the utilization rate of phosphogypsum waste is greatly increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to water stable layer production technical field especially a large amount of phosphogypsum water stable layer production line. BACKGROUND

[0002] Phosphogypsum as industrial waste is gradually used in roadbed water stable layer. In the traditional process, a small amount of phosphogypsum powder is usually mixed in raw materials. Due to the instability of the powder, it is not possible to mix too much phosphogypsum powder, and the proportion of phosphogypsum is more than 40%. With the progress of the process, mixing solidified phosphogypsum particles in raw materials can greatly increase the stability of phosphogypsum and increase the phosphogypsum content to 75%-85%, which can greatly digest phosphogypsum waste, making phosphogypsum the main material in water stable layer. But the existing water stable layer production line cannot meet the demand of large amount of phosphogypsum as main material. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a large amount of phosphogypsum water stable layer production line, which uses phosphogypsum as the main material to produce roadbed water stable layer.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is: a large amount of phosphogypsum water stable layer production line, which comprises a phosphogypsum powder bin. The phosphogypsum powder in the phosphogypsum powder bin is conveyed to a disc granulator by a spiral conveying device. The granulated phosphogypsum aggregate is conveyed to a raw material bin for storage. The output ends of the raw material bin and the auxiliary material bin are connected to a mixing tank. The output end of the mixing tank is connected to a stirring device. A water inlet pipe is connected to the stirring device.

[0005] Preferably, a water mist spraying device is arranged above the disc granulator.

[0006] Preferably, the granulated phosphogypsum aggregate is conveyed to a conveyor belt, and the conveyor belt passes through a tunnel type drying device to dry the phosphogypsum aggregate.

[0007] Preferably, a funnel-shaped guide cylinder is arranged between the discharge side of the disc granulator and the conveyor belt.

[0008] Preferably, a cold air cooling device is arranged above the conveyor belt after the conveyor belt passes through the tunnel type drying device.

[0009] Preferably, the phosphogypsum powder bin is provided with multiple.

[0010] Preferably, the auxiliary material bin is provided with multiple.

[0011] Preferably, the stirring device is a double-shaft stirring device.

[0012] This invention provides a production line for a high-volume phosphogypsum water-stabilized layer. The phosphogypsum powder is granulated to form phosphogypsum aggregate, which is then used as the main material for the roadbed water-stabilized layer. This production line can improve the strength and hardness of the high-volume phosphogypsum water-stabilized layer and increase the proportion of phosphogypsum to 75%-85%, significantly improving the utilization rate of phosphogypsum waste. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0015] like Figure 1 As shown, a high-volume phosphogypsum water-stabilized layer production line includes a phosphogypsum powder hopper 1. The phosphogypsum powder in the hopper 1 is conveyed to a disc granulator 2 via a screw conveyor. The granulated phosphogypsum aggregate is then conveyed to a raw material silo 3 for storage. The output ends of the raw material silo 3 and auxiliary material silo 4 are connected to a mixing tank 5, and the output end of the mixing tank 5 is connected to a stirring device 6. A water inlet pipe 7 is connected to the stirring device 6. The mixing tank 5 pre-mixes the dry materials to ensure the phosphogypsum aggregate is evenly mixed with other auxiliary materials before being conveyed to the stirring device 6 for mixing with water. This arrangement prevents prolonged soaking of localized phosphogypsum aggregate or uneven mixing of the phosphogypsum aggregate and water, which could lead to hydration and deterioration of the phosphogypsum aggregate.

[0016] Preferably, a water mist spraying device 8 is provided above the disc granulator 2. Water mist spraying is performed during the granulation process to improve the pelletizing rate and quality of the phosphogypsum aggregate.

[0017] Preferably, the granulated phosphogypsum aggregate is conveyed to conveyor belt 9, which passes through tunnel drying device 10 to dry the phosphogypsum aggregate.

[0018] Preferably, a funnel-shaped guide cylinder 11 is provided between the discharge side of the disc granulator 2 and the conveyor belt 9.

[0019] Preferably, after the conveyor belt 9 passes through the tunnel-type drying device 10, a cold air cooling device 12 is provided above the conveyor belt 9. After granulation, the phosphogypsum aggregate is dried and cooled before being stored in the raw material silo for production use.

[0020] Preferably, the phosphogypsum powder hopper 1 is provided in multiple locations. Phosphogypsum powder is prone to moisture absorption and clumping, so the hoppers are provided in small quantities to prevent caking.

[0021] Preferably, the auxiliary material bin 4 is provided with multiple bins. Each bin is used to store different dry materials, such as cement, gravel, sand, catalyst, etc. The various dry materials are mixed in the mixing tank 5, and then transported to the stirring device 6 for final mixing with water and liquid additives.

[0022] Preferably, the stirring device 6 is a double-shaft stirring device.

[0023] In the production process, the phosphogypsum powder is first input to the disc granulator 2 for granulation, and then transported to the conveying belt 9. The granulated phosphogypsum aggregate is sequentially subjected to drying and cooling treatment, and then stored in the raw material bin 3 for standby use. The raw materials and various auxiliary materials are first transported to the mixing tank 5 for dry mixing, and then transported to the stirring device 6 for final mixing with water.

[0024] The above embodiment is only a preferred technical solution of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. A large-dosage phosphogypsum water-stable layer production line, characterized in that: The application relates to a phosphogypsum powder production device, which comprises a phosphogypsum powder cabin (1), a disc granulator (2) for conveying the phosphogypsum powder in the phosphogypsum powder cabin (1) through a spiral conveying device, a raw material cabin (3) for storing the granulated phosphogypsum aggregate, a mixing tank (5) connected to the output ends of the raw material cabin (3) and an auxiliary material cabin (4), a stirring device (6) connected to the output end of the mixing tank (5), and a water inlet pipe (7) connected to the stirring device (6).

2. The large-dosage phosphogypsum water-stable layer production line according to claim 1, characterized in that: A water mist spraying device (8) is arranged above the disc granulator (2).

3. The large-dosage phosphogypsum water-stable layer production line according to claim 2, characterized in that: The granulated phosphogypsum aggregate is conveyed to a conveying belt (9) which passes through a tunnel type drying device (10) to dry the phosphogypsum aggregate.

4. The large-dosage phosphogypsum water-stable layer production line according to claim 3, characterized in that: A funnel-shaped guide cylinder (11) is arranged between the discharging side of the disc granulator (2) and the conveying belt (9).

5. The large-dosage phosphogypsum water-stable layer production line according to claim 3 or 4, characterized in that: A cold air cooling device (12) is arranged above the conveying belt (9) after the conveying belt (9) passes through the tunnel type drying device (10).

6. The large-dosage phosphogypsum water-stable layer production line according to claim 1, characterized in that: The phosphogypsum powder cabin (1) is provided with multiple cabins.

7. The large-dosage phosphogypsum water-stable layer production line according to claim 1, characterized in that: The auxiliary material cabin (4) is provided with multiple cabins.

8. The large-dosage phosphogypsum water-stable layer production line according to claim 1, characterized in that: The stirring device (6) is a double-shaft stirring device.

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