Reaction device for preparing ferrous sulfate from copper smelting tailings

Abstract

The utility model relates to the technical field of chemical engineering, and discloses a reaction device for preparing ferrous sulfate from copper smelting tailings. The disc feeder is in butt joint with an outlet in the bottom of the stock bin; the conveying system is used for conveying the tailings output by the disc feeder into the pulping tank; the pulping tank is connected with a water source and is used for preparing tailings into tailings pulp; the stirring tank is in butt joint with the discharge hole of the pulping tank; the reaction tower is connected with the discharge hole of the stirring tank and is connected with a sulfuric acid source; the blowing system comprises an air blower and a heating device, and an air outlet of the air blower is connected with the reaction tower through the heating device. Copper smelting tailings are pulped through the pulping tank and the stirring tank to obtain tailing pulp, then the tailing pulp and concentrated sulfuric acid are sprayed into the reaction tower through the nozzle together, the material contact area can be increased, meanwhile, hot air is introduced into the reaction tower, the concentrated sulfuric acid and the tailing pulp in the reaction tower are in a suspended state, the reaction time is prolonged, and the reaction efficiency is improved. The materials react completely and the reaction rate is accelerated.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, and more specifically to a reaction device for preparing ferrous sulfate from copper smelting tailings. Background Art

[0002] Copper smelting tailings are a major solid waste from the copper pyrometallurgical process. Statistics show that every ton of copper produced generates 0.6-0.7 tons of copper smelting tailings. Currently, the vast majority of copper smelting slag is still disposed of in piles, resulting in a low comprehensive recycling rate for solid waste resources.

[0003] Copper smelting tailings are oxide eutectics formed by the melting of iron and silicon at high temperatures during the blowing and iron removal process of pyrometallurgical copper smelting. The iron content can reach 30% to 50%. Therefore, using copper smelting tailings as raw material to prepare ferrous sulfate is an optimal way to recycle it. Usually, the copper smelting tailings are added to a sulfuric acid solution to directly react to produce ferrous sulfate. The obtained ferrous sulfate solution is then cooled, crystallized, and dried to obtain ferrous sulfate. However, in the process of preparing ferrous sulfate from copper smelting tailings, the reaction between the copper smelting tailings and concentrated sulfuric acid is slow, resulting in low production efficiency. Utility Model Content

[0004] The utility model aims to provide a reaction device for preparing ferrous sulfate from copper smelting tailings, so as to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A reaction device for preparing ferrous sulfate from copper smelting tailings includes a silo 100, a disc feeder 200, a conveying system 300, a slurry tank 400, a stirring tank 500, a reaction tower 600, and a blowing system 700.

[0007] The silo 100 can store tailings, and a tailings outlet is provided at the bottom thereof;

[0008] The disc feeder 200 is connected to the outlet at the bottom of the silo 100;

[0009] The conveying system 300 conveys the tailings output from the discharge port of the disc feeder 200 to the pulping tank 400;

[0010] The slurry making tank 400 is connected to a water source to make tailings slurry from the tailings;

[0011] The stirring tank 500 is connected to the discharge port of the slurry tank 400;

[0012] The reaction tower 600 is connected to the discharge port of the stirring tank 500, and the reaction tower 600 is also connected to a sulfuric acid source;

[0013] The blowing system 700 includes a blower 710 and a heating device 720 . The air outlet of the blower 710 is connected to the reaction tower 600 through the heating device 720 .

[0014] Furthermore, the conveying system 300 includes a first scraper 310, a second scraper 320 and a screw feeder 330 connected in sequence; the first scraper 310 is horizontally arranged and docked with the discharge port of the disc feeder 200; the second scraper 320 is tilted upward and connects the first scraper 310 and the screw feeder 330; the screw feeder 330 is docked with the feed port of the pulping tank 400.

[0015] Furthermore, there are multiple pulping tanks 400, and the multiple pulping tanks 400 are arranged in parallel.

[0016] Furthermore, the bottom of the pulping tank 400 is configured to be conical.

[0017] Furthermore, the tailings slurry and sulfuric acid stirred and outputted from the stirring tank 500 are sprayed into the reaction tower 600 through a nozzle.

[0018] Furthermore, the tailings slurry stirred and outputted from the stirring tank 500 and the sulfuric acid are sprayed into the reaction tower 600 through a common nozzle.

[0019] Furthermore, the tailings slurry and sulfuric acid enter the reaction tower 600 from the upper part of the reaction tower 600 , and the hot air generated by the blowing system 700 enters the reaction tower 600 from the lower part of the reaction tower 600 .

[0020] Furthermore, the bottom of the reaction tower 600 is conical.

[0021] Furthermore, a dust removal device 800 is included, and the dust removal device 800 is connected to the outlet at the top of the reaction tower 600.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The utility model provides a reaction device for preparing ferrous sulfate from copper smelting tailings. The copper smelting tailings raw material is transported to a slurrying tank through a conveying system. The copper smelting tailings are slurried in the slurrying tank and a stirring tank to obtain tailings slurry. The tailings slurry and concentrated sulfuric acid are then sprayed into a reaction tower through a nozzle, thereby increasing the contact area of ​​the materials. At the same time, hot air is introduced into the reaction tower, so that the concentrated sulfuric acid and the tailings slurry in the reaction tower are in a suspended state, thereby increasing the reaction time, ensuring complete reaction of the materials, and accelerating the reaction rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic structural diagram of a reaction device for preparing ferrous sulfate from copper smelting tailings in one embodiment;

[0026] Figure 2 A schematic structural diagram of a pulping tank in one embodiment;

[0027] Figure 3 A schematic structural diagram of a reaction tower in one embodiment;

[0028] 100. Silo;

[0029] 200. Disc feeder;

[0030] 300. Conveyor system;

[0031] 400. pulping tank, 410. tank body;

[0032] 500. Mixing tank;

[0033] 600. Reaction tower;

[0034] 700. Blowing system, 710. Blower, 720. Heating device;

[0035] 800. Dust removal device;

[0036] 900. Concentrated sulfuric acid storage tank. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See Figure 1 This embodiment provides a reaction device for preparing ferrous sulfate from copper smelting tailings, including a silo 100, a disc feeder 200, a conveying system 300, a slurry tank 400, a stirring tank 500, a reaction tower 600, a blowing system 700 and a dust removal device 800.

[0039] The silo 100 is installed on a building structure, 3.8 m above the ground. The silo 100 can store tailings, and a tailings outlet is provided at the bottom of the silo 100 .

[0040] The disc feeder 200 is connected to the outlet at the bottom of the silo 100 .

[0041] The conveying system 300 includes a first scraper 310, a second scraper 320 and a screw feeder 330 connected in sequence; the first scraper 310 is arranged horizontally and docked with the discharge port of the disc feeder 200; the second scraper 320 is arranged upwardly inclined and connects the first scraper 310 and the screw feeder 330; the screw feeder 330 is docked with the feed port of the slurry trough 400; the conveying system 300 transports the tailings output from the discharge port of the disc feeder 200 to the slurry trough 400.

[0042] The pulping tank 400 includes a tank body 410, in which a stirring blade driven by a motor is provided. The pulping tank 400 is connected to a water source. The tailings output from the discharge port of the disc feeder 200 enters the pulping tank 400 through the conveying system 300 and is mixed with water to produce tailings slurry.

[0043] In this embodiment, there are two pulping tanks 400, which are arranged in parallel. The bottom of the pulping tank 400 is conical. Figure 2 As shown, the angle b of the inner wall of the tapered portion at the bottom of the slurry making tank 400 is 140°, which can make the tailings slurry discharge smoother and prevent blockage.

[0044] The stirring tank 500 is connected to the discharge ports of the two slurrying tanks 400 , and the tailings slurry output from the two slurrying tanks 400 enters the stirring tank 500 for further uniform stirring.

[0045] The reaction tower 600 is connected to the discharge port of the stirring tank 500 through a pipeline and a pump, and the reaction tower 600 is connected to the concentrated sulfuric acid storage tank 900 through a pipeline.

[0046] The blowing system 700 includes a blower 710 and a heating device 720 . The air outlet of the blower 710 is connected to the reaction tower 600 through the heating device 720 .

[0047] In this embodiment, tailings slurry and sulfuric acid are sprayed into the reaction tower 600 from the upper part of the reaction tower 600 using a common nozzle, and hot air generated by the blowing system 700 is blown into the reaction tower 600 from the lower part of the reaction tower 600.

[0048] The bottom structure of the reaction tower 600 is conical. Figure 3 As shown, the inner wall angle a of the tapered portion at the bottom of the reaction tower 600 is 159°, which is also to ensure smoother material discharge and prevent blockage.

[0049] The dust removal device 800 is a cyclone dust collector connected to the exhaust outlet at the top of the reaction tower 600 .

[0050] The working principle of the reaction device for preparing ferrous sulfate from copper smelting tailings provided in this embodiment is as follows:

[0051] The copper smelting tailings are added to the silo 100 by an engineering vehicle, and enter the disc feeder 200 through the discharge port at the bottom of the silo 100. The tailings pass through the disc feeder 200, the first scraper 310, the second scraper 320, and the screw conveyor 330 and enter the pulping tank 400. The production water is added to the pulping tank 400 through a pipeline and mixed with the copper smelting tailings to make pulp. The tailings pulp output from the pulping tank 400 enters the mixing The tailings slurry is further stirred in the tank 500, and the evenly stirred tailings slurry is transported to the upper part of the reaction tower 600 through a pump and a pipeline, and is sprayed into the reaction tower 600 through a common nozzle with the concentrated acid; the blower 710 accelerates the air and blows it into the reaction tower 600 through the heating device 720, and the tailings slurry and concentrated sulfuric acid are suspended and reacted under the convection of the heated air, and the air is discharged into the atmosphere from the upper outlet of the reaction tower 600 after dust removal by the dust removal device 800.

[0052] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reaction device for preparing ferrous sulfate from copper smelting tailings, characterized in that: The invention comprises a silo (100), a disc feeder (200), a conveying system (300), a pulping tank (400), a stirring tank (500), a reaction tower (600) and a blowing system (700): The silo (100) can store tailings, and a tailings outlet is provided at the bottom thereof; The disc feeder (200) is connected to the outlet at the bottom of the silo (100); The conveying system (300) conveys the tailings output from the discharge port of the disc feeder (200) to the pulping tank (400); The pulping tank (400) is connected to a water source to produce tailings pulp from tailings; The stirring tank (500) is connected to the discharge port of the pulping tank (400); The reaction tower (600) is connected to the discharge port of the stirring tank (500), and the reaction tower (600) is also connected to a sulfuric acid source; The blowing system (700) comprises a blower (710) and a heating device (720), and an air outlet of the blower (710) is connected to the reaction tower (600) through the heating device (720).

2. A copper smelting tailings preparation ferrous sulfate reaction device according to claim 1, characterized in that: The conveying system (300) includes a first scraper (310), a second scraper (320) and a screw feeder (330) connected in sequence; the first scraper (310) is horizontally arranged and docked with the discharge port of the disc feeder (200); the second scraper (320) is tilted upward and connected with the first scraper (310) and the screw feeder (330); the screw feeder (330) is docked with the feed port of the pulping tank (400).

3. A copper smelting tailings preparation ferrous sulfate reaction device according to claim 1, characterized in that: The pulping tank (400) has a plurality of pulping tanks (400), and the plurality of pulping tanks (400) are arranged in parallel.

4. A copper smelting tailings preparation ferrous sulfate reaction device according to claim 1, characterized in that: The bottom of the pulping tank (400) is configured to be conical.

5. A copper smelting tailings preparation ferrous sulfate reaction device according to claim 1, characterized in that: The tailings slurry and sulfuric acid stirred and outputted from the stirring tank (500) are sprayed into the reaction tower (600) through a nozzle.

6. A reaction device for preparing ferrous sulfate from copper smelting tailings according to claim 5, characterized in that: The tailings slurry stirred and outputted from the stirring tank (500) and the sulfuric acid are sprayed into the reaction tower (600) through a common nozzle.

7. The reaction device for preparing ferrous sulfate from copper smelting tailings according to claim 1, characterized in that: Tailings slurry and sulfuric acid enter the reaction tower (600) from the upper part of the reaction tower (600), and hot air generated by the blowing system (700) enters the reaction tower (600) from the lower part of the reaction tower (600).

8. The reaction device for preparing ferrous sulfate from copper smelting tailings according to claim 1, characterized in that: The bottom of the reaction tower (600) is configured in a conical shape.

9. A reaction device for preparing ferrous sulfate from copper smelting tailings according to claim 1, characterized in that: It also includes a dust removal device (800), and the dust removal device (800) is connected to the outlet at the upper part of the reaction tower (600).

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