Device for separating trace metal from solid waste

Abstract

The utility model discloses a device for separating trace metal from solid waste, which comprises a grinder, a powder mixer, a rotary molten slurry furnace, a pressurizing pipe blowing device, a container and a water cooling tank, the outlet of the grinder is connected with the inlet of the powder mixer, the outlet of the powder mixer is connected with the inlet of the pressurizing pipe blowing device, and the container is connected with the water cooling tank. An outlet of the pressurizing pipe blowing device extends into the rotary molten slurry furnace, an inclined rotating mechanism for controlling the rotary molten slurry furnace to rotate and incline is arranged outside the rotary molten slurry furnace, the rotary molten slurry furnace is provided with a pouring edge opening, the lower part of the edge opening is connected with a container, and the container is conveyed into a water cooling tank through hoisting to cool and shape molten slurry. The solidified and shaped molten slurry is fed into an inlet of a grinding and crushing machine through a spiral conveyor, an outlet of the grinding and crushing machine is connected with a magnetic separator, and metal crushed aggregates obtained by the magnetic separator enter a storage box through a discharging valve; the device disclosed by the utility model can realize recovery of trace metals in high-temperature molten steel slag.

Description

Technical Field

[0001] The utility model relates to a device for separating trace metals from solid wastes, belonging to the technical field of solid waste treatment. Background Art

[0002] Solid wastes such as smelting slag and surface treatment heavy metal sludge contain small amounts of high-priced metals such as nickel, zinc, copper, tin, and chromium. The main treatment methods include physical methods, wet methods, and pyrolysis methods. Pyrolysis refers to a process in which metals are separated by direct reduction under high temperature and a reducing atmosphere, and recovered through bag recycling. The main methods include sintering, rotary kiln, and rotary hearth furnace. The main disadvantage of this method is that it cannot completely recover heavy metals with low content in solid waste. Even if they are reduced to metals, they are difficult to recover through a single sorting method because the particles are small and dispersed. Therefore, it causes a large amount of heavy metal pollution risks and increases the cost of solid waste disposal. Utility Model Content

[0003] The purpose of this utility model is to solve the above problems and provide a device for separating trace metals from solid waste. Heavy metal waste powder is blown into the steel slag slurry for thermal reduction, which can fully utilize the sensible heat of high-temperature molten steel slag, achieve effective utilization of energy, and at the same time realize the recovery of trace metals in high-temperature molten steel slag.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a device for separating trace metals from solid waste, comprising a grinder, a powder mixer, a rotary slurry furnace, a pressurized pipe blowing device, a container and a water-cooling tank, wherein the grinder outlet is connected to the powder mixer inlet, the powder mixer outlet is connected to the pressurized pipe blowing device inlet, the pressurized pipe blowing device outlet extends into the rotary slurry furnace, the rotary slurry furnace is provided with a tilting rotation mechanism for controlling its rotation and tilting on the outside, the rotary slurry furnace is provided with a pouring edge, the lower part of the edge is connected to the container, the container is hoisted and sent into the water-cooling tank so that the slurry is cooled and shaped, and the solidified slurry is sent to the grinding and crushing machine inlet through a screw conveyor, the grinding and crushing machine outlet is connected to a magnetic separator, and the metal scraps obtained by the magnetic separator enter the storage box through a discharge valve.

[0005] The technical solution further defined in the present utility model is:

[0006] Preferably, the pressurized pipe blowing device includes a powder conveying pipe, a side air pipe and an air flow pump device. One end of the powder conveying pipe is connected to the outlet of the powder mixer, and the other end extends into the rotary slurry furnace. A side air pipe connected to the interior of the powder conveying pipe is obliquely arranged below the powder conveying pipe, and the tail end of the side air pipe is connected to the air flow pump device.

[0007] Preferably, the side air circuit pipe is a high-pressure air circuit.

[0008] Preferably, the tilting and rotating mechanism includes a fixed platform, a rotating disk is provided at the bottom of the fixed platform, the rotating disk is connected to a rotating motor provided on the fixed platform, and its rotation is controlled by the rotating motor, connecting rods are provided on both sides of the rotating disk, and the connecting rods are connected to the fixed blocks on both sides of the rotating slurry furnace respectively, and two driving cylinders are symmetrically installed on the rotating disk, and the two driving cylinders are fixedly connected to the corresponding connecting rods through telescopic shafts.

[0009] Preferably, one end of the powder conveying pipe extends into the slurry of the rotating slurry furnace, so that the deepest distance from the slurry liquid surface to the bottom is maintained at 1120mm-6200mm, and the slurry is driven to flip from the bottom by high-pressure airflow, and as the slurry furnace rotates, the slurry flips in a spiral.

[0010] Preferably, the container is a square bucket or a disc container.

[0011] Compared with the existing technology, the utility model has the following beneficial effects: after the metal-containing solid waste is ground by a grinder, the heavy metal waste powder is blown into the steel slag slurry for thermal reduction, which can fully utilize the sensible heat of the high-temperature molten steel slag, realize the effective utilization of energy, and at the same time can realize the recovery of trace metals in the high-temperature molten steel slag;

[0012] The utility model connects a branched side air path to the powder conveying pipe, which reduces the resistance of the main conveying air path, supplements the conveying energy to the main conveying air path, increases the conveying pressure, and enables the main conveying air path to continue to maintain the conveying flow rate. At the same time, when the powder conveying pipe is deposited and the main conveying air path does not run smoothly, the side air path can blow the air flow obliquely from the side of the powder conveying pipe into the powder conveying pipe, which can break up the settled and deposited powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Fig. 1 It is a structural diagram of the utility model;

[0014] Fig. 2 This is a schematic structural diagram of the pressurized pipe blowing device of the present invention. DETAILED DESCRIPTION Example

[0015] This embodiment provides a device for separating trace metals from solid waste, such as Figs. 1-2 As shown: It includes a grinder 1, a powder mixer 2, a rotary slurry furnace 3, a pressurized pipe blowing device 4, a container and a water cooling tank 6, wherein the outlet of the grinder 1 is connected to the inlet of the powder mixer 2.

[0016] The pressurized pipe blowing device 4 comprises a powder conveying pipe 4-1, a side gas path pipe 4-2 and a gas flow pump device 4-3, one end of the powder conveying pipe is connected with the outlet of the powder mixer, the other end extends into the rotary smelting furnace, the distance from the smelting liquid surface to the bottom is kept at 4000mm, the side gas path pipe is arranged obliquely below the powder conveying pipe and is connected with the inside of the powder conveying pipe, the side gas path pipe is a high-pressure gas path, and the tail of the side gas path pipe is connected with the gas flow pump device 4-3;

[0017] The rotary smelting furnace 3 is externally provided with a tilting and rotating mechanism for controlling the rotation and tilting of the rotary smelting furnace, the tilting and rotating mechanism comprises a fixed platform 7, the bottom of the fixed platform is provided with a rotating disc 8, the rotating disc is connected with a rotating motor 9 arranged on the fixed platform and is controlled to rotate by the rotating motor, connecting rods 10 are arranged on both sides of the rotating disc and are connected with fixed blocks 11 on both sides of the rotary smelting furnace through the connecting rods, and two drive oil cylinders 12 are symmetrically arranged on the rotating disc and are fixedly connected with corresponding connecting rods through telescopic shafts 13;

[0018] The rotary smelting furnace is provided with a pouring flange 14, the lower part of the pouring flange is connected with a disc container or a square-shaped hopper 5, the disc container can be inserted into an annealing furnace, the square-shaped hopper 5 is immersed in a water cooling tank 6 so that the smelting liquid is cooled and shaped, the shaped smelting liquid is sent into the inlet of a grinding crusher 16 through a screw conveyor 15, the outlet of the grinding crusher is connected with a magnetic separator 17, and the metal fragments obtained by the magnetic separator are sent into a storage box 18 through a discharge valve.

[0019] In the embodiment, the metal-containing solid waste is ground by a grinding machine, the heavy metal waste powder is blown into the steel slag smelting liquid for heating reduction, the sensible heat of the high-temperature molten steel slag can be fully utilized, the energy can be effectively utilized, and the trace metals in the high-temperature molten steel slag can be recycled;

[0020] In the embodiment, the branched side gas path is connected with the powder conveying pipe, the resistance of the main conveying gas path is reduced, the conveying energy of the main conveying gas path is supplemented, the conveying pressure is increased, the main conveying gas path can continue to maintain the conveying flow rate, when the powder conveying pipe is deposited and the main conveying gas path does not run smoothly, the side gas path can blow the gas flow to the powder conveying pipe from the side of the powder conveying pipe, and the deposited powder can be dispersed.

[0021] In addition to the above-mentioned embodiments, the utility model can also have other implementation manners. Any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A device for separating trace metals from solid waste, comprising a grinder, a powder mixer, a rotary slurry furnace, a pressurized pipe blowing device, a container, and a water cooling tank, characterized in that: The grinder outlet is connected to the powder mixer inlet, and the powder mixer outlet is connected to the pressurized pipe blowing device inlet, and the pressurized pipe blowing device outlet extends into the rotary slurry furnace. The rotary slurry furnace is provided with a tilting rotation mechanism outside to control its rotation and tilt. The rotary slurry furnace is provided with a pouring edge, and the lower part of the edge is connected to the container. The container is hoisted and sent into the water cooling tank to cool and shape the slurry. The solidified slurry is sent to the grinding crusher inlet through a screw conveyor. The grinding crusher outlet is connected to the magnetic separator, and the metal scraps obtained by the magnetic separator enter the storage box through the discharge valve.

2. The device for separating trace metals from solid waste according to claim 1, characterized in that: The pressurized pipe blowing device includes a powder conveying pipe, a side air pipe and an air flow pump device. One end of the powder conveying pipe is connected to the outlet of the powder mixer, and the other end extends into the rotary slurry furnace. A side air pipe connected to the interior of the powder conveying pipe is obliquely arranged below the powder conveying pipe, and the tail end of the side air pipe is connected to the air flow pump device.

3. The device for separating trace metals from solid waste according to claim 2, characterized in that: The side air pipe is a high-pressure air pipe.

4. The device for separating trace metals from solid waste according to claim 1, characterized in that: The tilting and rotating mechanism includes a fixed platform, a rotating disk is provided at the bottom of the fixed platform, the rotating disk is connected to a rotating motor provided on the fixed platform, and its rotation is controlled by the rotating motor. Connecting rods are provided on both sides of the rotating disk, and are connected to the fixed blocks on both sides of the rotating slurry furnace through the connecting rods. At the same time, two driving cylinders are symmetrically installed on the rotating disk, and the two driving cylinders are fixedly connected to the corresponding connecting rods through telescopic shafts.

5. The device for separating trace metals from solid waste according to claim 2, characterized in that: One end of the powder conveying pipe extends into the slurry of the rotary slurry furnace, so that the maximum distance from the slurry liquid surface to the bottom is maintained at 1120mm-6200mm.

6. The device for separating trace metals from solid waste according to claim 1, characterized in that: The container is a square bucket or a disc container.

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