A material adding device

Abstract

The utility model discloses a material adding device belongs to the field of hydrometallurgy. The problem of uneven feeding and dust flying everywhere caused by manual bag breaking of additive in the hydrometallurgy process is solved. The utility model discloses a material receiving bin, and a dust collector is arranged on the upper portion of the material receiving bin. The dust collector is a jacketed hollow structure, and a grid is uniformly arranged on the inner wall of the dust collector. The grid is in communication with the air outlet of the outer wall of the dust collector, and the air outlet is connected with a draft fan. The dust collector is arranged on the inner wall of the material receiving bin, so that the dust can be recycled through the dust collector after the bagged additive is broken. The environmental pollution is reduced. Under the action of the draft fan, the recycled dust can be used again, and the material loss is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of material mixing technology, and specifically relates to a material adding device. Background Technology

[0002] In continuous leaching technology used in hydrometallurgy, it is often necessary to add additives such as bagged sodium carbonate during the reaction process to adjust the pH value of the solution system. Traditional addition devices require hoisting the bagged sodium carbonate to the reaction tank or slurry tank opening and manually breaking the bag. The bag-breaking process is time-consuming and labor-intensive, the amount of additive added is uneven, dust flies everywhere, the pH value fluctuates greatly, affecting the reaction effect, and the working environment is poor. Utility Model Content

[0003] The purpose of this invention is to provide a material adding device to solve the problems of uneven addition of additives by manually breaking open the bag during the process of adding bagged additives, and dust flying everywhere after the bag is broken.

[0004] The present invention adopts the following technical solution:

[0005] An innovation of a material feeding device, including a receiving hopper, is as follows:

[0006] Dust recovery system

[0007] The upper part of the receiving silo is equipped with a ring-shaped dust collector. The dust collector adopts a jacketed hollow structure and its inner wall is evenly distributed with dustproof grids along the circumference. The dustproof grids are connected to the exhaust port set on the outer wall of the dust collector. The exhaust port is connected to an induced draft fan to realize active dust suction and recovery.

[0008] High-efficiency bag breaking structure

[0009] The receiving hopper is equipped with a cone-shaped bag breaker, with the cone tip facing upwards and fixed to the bottom of the hopper. Gravity is used to cause the bagged additives to hit the cone tip and automatically break the bag.

[0010] Precision feeding mechanism

[0011] The bottom of the receiving hopper is connected to the screw feeder via a connecting pipe;

[0012] The discharge port of the screw feeder is connected to the middle of the connecting pipe, and the two ends of the connecting pipe are respectively connected to the adjacent reaction tanks;

[0013] The screw feeder is driven by a power unit, which includes a variable frequency motor and a reducer. The amount of additives added is precisely controlled by variable frequency speed regulation.

[0014] Leakage prevention design

[0015] The centerline of the screw feeder forms a 75° angle with the centerline of the receiving hopper to prevent material from flowing into the connecting pipe due to vibration or gravity when the machine stops.

[0016] The beneficial effects of this utility model are as follows:

[0017] Zero dust pollution: The dust collector efficiently captures dust from broken bags under the action of the induced draft fan, with a recovery rate of >90%, avoiding environmental pollution. The recovered dust can be reused.

[0018] Automated bag breaking: The conical bag breaking device increases bag breaking efficiency to 100%, requiring no manual intervention and reducing labor intensity;

[0019] Uniform and stable feeding: The screw feeder achieves quantitative delivery of additives through frequency conversion speed regulation, ensuring that the pH value fluctuation range of the solution system is ≤±0.3;

[0020] Premixing to enhance reaction: The connecting pipe utilizes the solution flow between the reaction tanks to create a slight negative pressure, which allows the additives to be pre-slurryed and dissolved inside the pipe, improving the uniformity of the reaction;

[0021] Leakage prevention: The 75° tilt design completely solves the problem of material flow during shutdown, avoiding waste of additives;

[0022] Mobility optimization: Rollers are installed on the four corner support legs at the bottom of the receiving hopper to facilitate flexible equipment transfer. Attached Figure Description

[0023] Figure 1 This is a half-sectional structural diagram of the present invention.

[0024] Figure 2 This is a schematic diagram of the external shape of the present invention.

[0025] In the diagram: 1-Receiving bin; 2-Dust collector; 3-Exhaust vent; 4-Bag breaker; 6-Power unit; 7-Screw feeder; 8-Discharge port; 9-Exhaust fan; 10-Connecting pipe; 11-Roller; 12-Connecting pipe. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-2 The present invention will be further explained and described below.

[0027] 1. Main Structure

[0028] Receiving bins and dust collection systems ( Figure 1 )

[0029] The receiving silo 1 adopts a stainless steel cylindrical structure (diameter Φ800mm, height 1200mm), and an annular jacketed hollow dust collector 2 (section width 120mm) is welded to its upper part. The inner wall of the dust collector 2 is evenly distributed with 304 stainless steel grids (grid gap width 2mm). The grids are connected to the exhaust port 3 on the outer wall of the dust collector 2. The exhaust port 3 is connected to the induced draft fan 9 (air volume 1500m³ / h) through a corrugated pipe.

[0030] Bag breaking mechanism

[0031] A conical bag breaker 4 (cone angle 60°, height 300mm) is welded to the center of the bottom of the receiving hopper 1. It is made of manganese steel and has been surface hardened, with the cone tip pointing vertically upwards.

[0032] 2. Feeding system connection ( Figure 1-2 )

[0033] The bottom flange of receiving hopper 1 is connected to DN150 connecting pipe 12, and the lower end of connecting pipe 12 is obliquely connected to screw feeder 7 (diameter Φ200mm, length 1.5m) at a 75° angle.

[0034] The discharge port 8 of the screw feeder 7 is welded to the middle of the connecting pipe 10 (DN200 seamless steel pipe). The two ends of the connecting pipe 10 are connected to the liquid inlet of the adjacent reaction tank through flanges (the installation height is 500mm lower than the liquid level of the reaction tank).

[0035] The power unit 6 includes a variable frequency motor (3kW power) and a planetary gear reducer (speed ratio 1:15), which drives the main shaft of the screw feeder 7 through a coupling. The frequency converter is installed in the control box on the side wall of the equipment.

[0036] 3. Mobile mechanism ( Figure 2 )

[0037] The bottom of the receiving hopper 1 is welded with four support legs (600mm high), and each support leg is equipped with a braked universal roller 11 (load capacity 500kg / each).

[0038] 4. Work Process

[0039] Step 1: Feeding and breaking the bag

[0040] The bagged sodium carbonate is put into the receiving bin 1, and the bag falls and hits the cone tip of the bag breaker 4 to achieve automatic bag breaking;

[0041] Step 2: Dust Recovery

[0042] The dust generated by the bag breaking enters the interlayer of the dust collector 2 through the grid, and is drawn to the dust collection bag through the exhaust port 3 under the negative pressure of the induced draft fan 9 (recovery rate ≥92%).

[0043] Step 3: Quantitative feeding

[0044] The additive falls into the connecting pipe 12 and is conveyed to the discharge port 8 by the screw feeder 7; the motor speed is adjusted by the frequency converter (range 5-50 rpm) to control the feeding rate of 0.1-1.0 t / h.

[0045] Step 4: Premixing and Dosing

[0046] The additive enters the connecting pipe (10) through the outlet 8. It is slurried and dissolved in the pipe by utilizing the slight negative pressure (-0.05MPa) formed by the flow of solution between the reaction tanks, and is finally uniformly dispersed into the reaction system.

Claims

1. A material adding device, characterized in that: The system includes a receiving silo (1), with a dust collector (2) installed on its upper part. The dust collector (2) has a jacketed hollow structure and its inner wall is uniformly covered with dust collection grids along the circumference. The dust collection grids are connected to an exhaust port (3) on the outer wall of the dust collector (2), and an induced draft fan (9) is connected to the exhaust port (3). A bag breaker (4) is installed inside the receiving silo (1). The bag breaker (4) has a conical structure with the tip of the cone facing upwards and the bottom of the cone fixed to the bottom of the receiving silo (1). A connecting pipe (12) is connected to the bottom of the receiving silo (1), and a spiral feeder is connected to the end of the connecting pipe (12). The screw feeder (7) is provided with a discharge port (8), which is connected to the middle of the connecting pipe (10); the two ends of the connecting pipe (10) are respectively connected to two adjacent reaction tanks; the conveying shaft of the screw feeder (7) passes through the connecting pipe (12) and is connected to a power device (6); the power device (6) includes a variable frequency motor and a reducer, and the variable frequency motor drives the screw feeder (7) through the reducer; the center line of the screw feeder (7) forms a 75° angle with the center line of the receiving bin (1); the four corner legs at the bottom of the receiving bin (1) are equipped with rollers (11).

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