CN216337329U

CN216337329U - Overhaul slag ash recovery device

Info

Publication number: CN216337329U
Application number: CN202121279385.1U
Authority: CN
Inventors: 蒋世杰; 刘雅萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-04-19
Anticipated expiration: 2031-06-09

Abstract

The overhaul slag ash recovery device comprises a washing separation mechanism, a drying mechanism communicated with the washing separation mechanism, a coarse screen crushing mechanism communicated with the drying mechanism, a screening crushing mechanism communicated with the coarse screen crushing mechanism, a mixing mechanism communicated with the screening crushing mechanism, an extrusion granulation mechanism communicated with a mixing container of the mixing mechanism, and a double-chamber furnace mechanism respectively communicated with the screening crushing mechanism and the extrusion granulation mechanism. Therefore, the carbon rods in the overhaul slag ash can be effectively separated and recycled from the aluminum ash through water washing separation without subsequent processing, the aluminum ash is used as a raw material for manufacturing steel slag refining agents, slag melting agents and alumina refractory materials in steel plants, the cost is low, the effect is good, the waste materials can be completely applied, the zero-waste target is achieved, and the cyclic regeneration and reutilization of resources are realized.

Description

Overhaul slag ash recovery device

Technical Field

The utility model relates to a device for recycling overhaul slag ash, in particular to a device which can effectively separate carbon rods in overhaul slag ash from aluminum ash through water washing separation and can be used as raw materials for manufacturing steel slag refining agents, slag melting agents and alumina refractory materials in steel plants, and particularly relates to a device which has low cost and good effect, can completely apply waste materials, achieves the aim of zero waste and realizes recycling of resources.

Background

China is the biggest world electrolytic aluminum producing country, the aluminum electrolytic cell generally needs to be overhauled after being used for 4-5 years, the average service life of the aluminum electrolytic cell of most domestic enterprises is about 1500 days, the waste lining removed in the process of overhauling is electrolytic cell overhauled slag, the overhauled slag mainly comprises waste cathode carbon blocks, waste refractory bricks, rolling paste, waste heat-insulating bricks, refractory powder, refractory mortar, waste heat-insulating plates and the like, and also contains soluble fluoride, and the production amount of the soluble fluoride is about 30kg/fAl (relative number is changed along with the age of the electrolytic cell). At present, the national electrolytic aluminum production capacity exceeds 900 million t/a, and the overhaul slag production amount is about 27 million t/a.

The aluminum electrolysis production adopts a molten salt electrolysis method. In the electrolytic production process, a part of fluorine-containing electrolyte is absorbed by a carbon tank lining and then diffused into other furnace building materials. However, the electrolytic cell overhaul residues are dangerous solid wastes due to the adsorption of fluoride and a small amount of cyanide, and if the electrolytic cell overhaul residues are not effectively comprehensively utilized and harmlessly treated or are not properly stored and treated, the electrolytic cell overhaul residues have long-term potential pollution influence on soil and underground water.

In the prior art, the treatment method for the overhaul tank slag of the aluminum electrolytic tank has the defects of complex manufacturing process, incapability of utilizing the overhaul tank slag of the aluminum electrolytic tank in a large amount and high added value, so that the realization of industrial application is not enough, and most of the overhaul tank slag of the aluminum electrolytic tank is still abandoned. However, the overhaul slag of the electrolytic cell, whether stored or buried, requires a huge investment cost and operation management cost, and has a long-term potential pollution hazard. Therefore, the method generally cannot meet the requirements of users on simple and effective waste reduction and recovery treatment of overhaul residues in actual use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems encountered in the prior art and provide a device for recycling overhaul slag ash, which can effectively separate and recycle carbon rods in the overhaul slag ash from aluminum ash through water washing separation without subsequent processing, and can use the aluminum ash as a raw material for manufacturing steel slag refining agents, slagging agents and alumina refractory materials in steel plants, so that the device has the advantages of low cost and good effect, can completely apply waste materials, achieves the aim of zero waste, and realizes recycling and reutilization of resources.

In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows: the utility model provides a overhaul sediment ash recovery unit for handling separation overhaul sediment ash which characterized in that, the device includes: a water washing separation mechanism for continuously providing water for mixing the overhaul slag ash entering the water washing separation mechanism, and discharging carbon rods and aluminum ash in the overhaul slag ash from the water washing separation mechanism by utilizing specific gravity difference; the drying mechanism is communicated with the water washing and separating mechanism and is used for drying the separated aluminum ash to form an aluminum ash block; the coarse screening and crushing mechanism is communicated with the drying mechanism and is used for screening the aluminum ash blocks to obtain coarse aluminum ash blocks by coarse screening, and then crushing the coarse aluminum ash blocks to obtain crushed aluminum ash blocks with a plurality of particle size ranges; the screening and crushing mechanism is communicated with the coarse screening and crushing mechanism, multiple layers of screens from coarse to fine are arranged in the screening and crushing mechanism from top to bottom, and are used for screening coarse and fine particle sizes of crushed aluminum ash blocks, filtering out aluminum particles, aluminum fine particles and fine aluminum ash with particle sizes decreasing from top to bottom by using a layered screen, and crushing the aluminum fine particles into aluminum sheet; the mixing and stirring mechanism is communicated with the screening and crushing mechanism and comprises a mixing and stirring container and a mixing unit connected with the mixing and stirring container, wherein the mixing and stirring container is used for mixing the screened fine aluminum ash with at least one of calcium oxide, calcium carbonate or high-aluminum calcium fly ash and mixing the fine aluminum ash and the at least one of calcium oxide, calcium carbonate or high-aluminum calcium fly ash into a material; an extrusion granulation mechanism which is communicated with the mixing container of the mixing mechanism and extrudes and granulates the uniformly mixed materials into spherical or blocky steel slag materials with the particle size of 2-100 mm; and a double-chamber furnace mechanism which is respectively communicated with the screening and crushing mechanism and the extrusion granulation mechanism, wherein the double-chamber furnace mechanism comprises a first smelting furnace communicated with the screening and crushing mechanism and a second smelting furnace communicated with the extrusion granulation mechanism, the first smelting furnace melts input aluminum particles and aluminum metal sheets to form an aluminum ingot product, and the second smelting furnace sinters input steel slag materials at 1000-1450 ℃ to form a steel slag refining agent, a slag melting agent and an alumina refractory material.

The washing separating mechanism comprises a specific gravity filter tank and a specific gravity filter unit, the specific gravity filter unit is fixedly arranged in the specific gravity filter tank, and when the overhaul slag ash is treated, the aluminum ash with larger specific gravity in the overhaul slag ash is downwards precipitated on the lower layer of the specific gravity filter unit and the carbon rod with smaller specific gravity is upwards floated on the upper layer of the specific gravity filter unit.

The specific gravity filter tank is internally provided with a water outlet for discharging the carbon rod on the upper layer of the specific gravity filter unit and extracting the aluminum ash precipitated on the lower layer of the specific gravity filter unit, and the carbon rod discharged from the specific gravity filter tank can be pumped back to the specific gravity filter tank for recycling through separating from water.

The specific gravity filtering unit is a filter screen.

The drying mechanism is used for drying the aluminum ash which is washed and recovered at the temperature of 240-360 ℃.

The multi-layer screen of the screening and crushing mechanism comprises a first layer screen for controlling and screening aluminum particles with the particle size smaller than 20 meshes, a second layer screen for controlling and screening aluminum fine particles with the particle size of 20-80 meshes and a third layer screen for controlling and screening fine aluminum ash with the particle size of 80-400 meshes from top to bottom.

The screening and crushing mechanism comprises a circular roller crusher for crushing the aluminum fine particles into aluminum sheet metal again.

The third layer of screen is a cyclone separator arranged in a closed container, and can be used for classifying the fine aluminum ash with the particle size of 80-400 meshes by a micro-screen in a closed cyclone circulation mode.

The batching unit is composed of a calcium oxide supply part, a calcium carbonate supply part and a high-alumina calcium fly ash supply part which are respectively matched with a feeding valve.

The extrusion granulation mechanism is used for granulating the uniformly mixed materials into spherical or blocky steel slag materials with the particle size of 2-100 mm at the extrusion pressure of 50-100 tons.

Drawings

FIG. 1 is a schematic diagram of the basic architecture of the present invention.

FIG. 2 is a block diagram of the present invention.

Reference numbers refer to:

washing and separating mechanism 1

Specific gravity filter tank 11

Specific gravity filter unit 12

Drying mechanism 2

Coarse screen crushing mechanism 3

Screening and crushing mechanism 4

Multi-layer screen 41

First layer screen 411

Second layer screen 412

Third layer of screen 413

Round roller crusher 42

Mixing mechanism 5

Kneading container 51

Dosing unit 52

Feed valve 521

Calcium oxide supply part 522

Calcium carbonate supply unit 523

High alumina calcium fly ash supply 524

Extruding granulation mechanism 6

Double chamber furnace mechanism 7

First melting furnace 71

A second melting furnace 72.

Detailed Description

Please refer to fig. 1 and fig. 2, which are a schematic diagram of a basic architecture and a block diagram of the present invention, respectively. As shown in the figure: the utility model relates to a device for recovering overhaul slag ash, which comprises a water washing separation mechanism 1, a drying mechanism 2, a coarse screening and crushing mechanism 3, a screening and crushing mechanism 4, a mixing mechanism 5, an extrusion granulation mechanism 6 and a double-chamber furnace mechanism 7.

The above-mentioned washing and separating mechanism 1 includes a specific gravity filter tank 11 and a specific gravity filter unit 12 fixed in the specific gravity filter tank 11, wherein the specific gravity filter tank 11 is provided with a water outlet (not shown), and the specific gravity filter unit 12 is a filter screen.

The drying mechanism 2 is communicated with the water washing and separating mechanism 1.

The coarse screen crushing mechanism 3 is communicated with the drying mechanism 2.

The screening and crushing mechanism 4 is communicated with the coarse screening and crushing mechanism 3, the screening and crushing mechanism 4 is provided with a plurality of layers of screens 41 and a circular roller crusher 42, the plurality of layers of screens 41 comprise a first layer of screen 411, a second layer of screen 412 and a third layer of screen 413 from top to bottom, the screen mesh (mesh) numbers of the first layer of screen 411, the second layer of screen 412 and the third layer of screen 413 are changed from coarse to fine, and the circular roller crusher 42 is connected with the second layer of screen 412; the third layer of screen 413 is a cyclone separator disposed in a closed container.

The mixing mechanism 5 is communicated with the screening and crushing mechanism 4, and the mixing mechanism 5 comprises a mixing container 51 and a batching unit 52 connected with the mixing container 51; wherein the batching unit 52 is composed of a calcium oxide supply part 522, a calcium carbonate supply part 523 and a high alumina calcium fly ash supply part 523 which are respectively matched with a feeding valve 521, so as to provide calcium oxide, calcium carbonate and high alumina calcium fly ash to the mixing container 51.

The extrusion granulation mechanism 6 is provided in communication with the kneading container 51 of the kneading mechanism 5.

The double-chamber furnace mechanism 7 is respectively communicated with the screening and crushing mechanism 4 and the extrusion granulation mechanism 6. The double chamber furnace mechanism 7 comprises a first melting furnace 71 communicated with the screening and crushing mechanism 4 and a second melting furnace 72 communicated with the extrusion granulation mechanism 6. Therefore, the device disclosed above constitutes a brand-new aluminum ash and overhaul ash recovery device.

The apparatus provides for treating a separated overhaul ash 8 to be treated, the overhaul ash 8 having a plurality of aluminum ashes (refractory materials) and a plurality of carbon rods. When in use, the water washing and separating mechanism 1 is used for continuously supplying water to the overhaul slag ash 8 for mixing to form a mixture of water, carbon rods and aluminum ash, and the carbon rods and the aluminum ash are respectively discharged from the water washing and separating mechanism 1 by utilizing the specific gravity difference of the carbon rods and the aluminum ash. In one embodiment, the washing and separating mechanism 1 provides water to fill the specific gravity filter tank 11, the major repair ash 8 to be treated is placed in the specific gravity filter tank 11 and soaked, so that the major repair ash to be treated is softened and the carbon rods and the aluminum ash inside are separated out, the aluminum ash with higher specific gravity is precipitated downwards at the lower layer of the specific gravity filter unit 12, the carbon rods with lower specific gravity are floated upwards at the upper layer of the specific gravity filter unit 12, a water outlet is arranged in the specific gravity filter tank 11, the carbon rods at the upper layer of the specific gravity filter unit 12 can be discharged and recycled, and the aluminum ash precipitated at the lower layer of the specific gravity filter unit 12 is pumped out. And, the carbon rod discharged from the specific gravity filter tank 11 is separated from water, the water can be pumped back to the specific gravity filter tank 11 for recycling, and the precipitated aluminum ash is pumped out to the drying mechanism 2 for drying treatment at the temperature of 300 ℃ to form an aluminum ash block.

Conveying the dried aluminum ash blocks to the coarse screening and crushing mechanism 3, screening the aluminum ash blocks to obtain coarse aluminum ash blocks, crushing the coarse aluminum ash blocks to obtain crushed aluminum ash blocks with a plurality of particle size ranges, and conveying the crushed aluminum ash blocks to the screening and crushing mechanism 4. The screening and crushing mechanism 4 screens the crushed aluminum ash blocks with different particle sizes by the multi-layer screen 41, controls and screens aluminum particles with a particle size smaller than 20 meshes by the first layer screen 411 from top to bottom, controls and screens aluminum particles with a particle size of 20-80 meshes by the second layer screen 412, controls and screens fine aluminum ash with a particle size of 80-400 meshes by the third layer screen 413, filters the aluminum particles, the aluminum particles and the fine aluminum ash with decreasing particle sizes from top to bottom by a layered screen, and crushes the aluminum particles screened by the second layer screen 412 into aluminum flakes by the circular roller crusher 42. Wherein, the aluminum particles and the aluminum metal sheet passing through the first and

second screens

411, 412 are respectively conveyed to the first melting furnace 71 of the double chamber furnace mechanism 7 to be melted into an aluminum ingot product.

Fine aluminum ash with a particle size of 80-400 meshes is conveyed to the mixing mechanism 5 through the third layer of screen mesh 413 in a closed cyclone circulation manner, the fine aluminum ash after screening is mixed with at least one of calcium oxide, calcium carbonate or high-alumina calcium fly ash in a mixing container 51 of the mixing mechanism 5 to form a material, the uniformly mixed material is conveyed to the extrusion granulation mechanism 6 to be extruded under a pressure of 50-100 tons to be granulated into a steel slag material with a particle size of 2-100 mm in a spherical or block shape, and the steel slag material is conveyed to a second melting furnace 72 of the double-chamber furnace mechanism 7 to be sintered at a temperature of 1000-1450 ℃ to form a steel slag refining agent, a slag melting agent and an alumina refractory material.

In conclusion, the overhaul slag ash recovery device can effectively improve various defects in the prior art, can effectively separate and recover carbon rods in overhaul slag aluminum ash through washing separation, does not need subsequent processing, enables the aluminum ash to be used as a manufacturing raw material of a steel slag refining agent, a slag melting agent and an alumina refractory material in a steel plant, has low cost and good effect, can completely apply waste materials, achieves the aim of zero waste, realizes resource recycling, can further make the production of the device more advanced, more practical and more accordant with the requirements of users, and really accords with the requirements of novel patent applications, and the patent applications are legally proposed.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby. Therefore, all the equivalent changes and modifications made in the claims and the contents of the new specification should be covered by the scope of the present invention.

Claims

1. The utility model provides a overhaul sediment ash recovery unit for handling separation overhaul sediment ash which characterized in that, the device includes:

a water washing separation mechanism for separating the carbon rod and the aluminum ash in the overhaul slag ash;

the drying mechanism is communicated with the water washing and separating mechanism and is used for drying the separated aluminum ash into aluminum ash blocks;

the coarse screening and crushing mechanism is communicated with the drying mechanism and is used for screening the aluminum ash blocks to obtain coarse aluminum ash blocks by coarse screening, and then crushing the coarse aluminum ash blocks to obtain crushed aluminum ash blocks with a plurality of particle size ranges;

the screening and crushing mechanism is communicated with the coarse screening and crushing mechanism, a multi-layer screen mesh from coarse to fine is arranged in the screening and crushing mechanism from top to bottom and used for screening coarse and fine particle sizes of the crushed aluminum ash blocks so as to filter out aluminum particles, fine aluminum particles and fine aluminum ash with progressively decreasing particle sizes through a layered screening, and the screening and crushing mechanism is used for crushing the fine aluminum particles into aluminum metal sheets;

the mixing and stirring mechanism is communicated with the screening and crushing mechanism and comprises a mixing and stirring container and a batching unit, wherein the mixing and stirring container is used for mixing and stirring the screened fine aluminum ash and calcium oxide, calcium carbonate or high-aluminum calcium fly ash into a material;

an extrusion granulation mechanism which is communicated with the mixing container of the mixing mechanism and extrudes and granulates the uniformly mixed materials into spherical or blocky steel slag materials with the particle size of 2-100 mm; and

and the double-chamber furnace mechanism is respectively communicated with the screening and crushing mechanism and the extrusion and granulation mechanism, the double-chamber furnace mechanism comprises a first smelting furnace communicated with the screening and crushing mechanism and a second smelting furnace communicated with the extrusion and granulation mechanism, the first smelting furnace melts input aluminum particles and aluminum metal sheets to form an aluminum ingot product, and the second smelting furnace sinters input steel slag materials at 1000-1450 ℃.

2. The recycling apparatus for overhaul residue ash as claimed in claim 1, wherein the washing and separating mechanism comprises a specific gravity filter tank and a specific gravity filter unit, the specific gravity filter unit is fixed in the specific gravity filter tank, when the overhaul residue ash is processed, the aluminum ash with high specific gravity in the overhaul residue ash is precipitated at the lower layer of the specific gravity filter unit, and the carbon rod with low specific gravity floats upwards at the upper layer of the specific gravity filter unit.

3. The recycling device of the overhaul slag ash as claimed in claim 2, wherein a water outlet is arranged in the specific gravity filter tank and used for discharging the carbon rods on the upper layer of the specific gravity filter unit.

4. The overhaul slag ash recovery device of claim 2, wherein the specific gravity filter unit is a screen.

5. The device for recycling overhaul slag ash as claimed in claim 1, wherein the drying temperature of the drying mechanism is 240-360 ℃.

6. The recycling device for the overhaul slag ash as claimed in claim 1, wherein the plurality of layers of screens of the screening and crushing mechanism comprise a first layer of screen for controlling and screening the aluminum particles with the particle size less than 20 meshes, a second layer of screen for controlling and screening the aluminum particles with the particle size of 20-80 meshes and a third layer of screen for controlling and screening the fine aluminum ash with the particle size of 80-400 meshes from top to bottom.

7. The recycling apparatus for overhaul slag ash as claimed in claim 1 or 6, wherein the screening and crushing means comprises a circular drum crusher for crushing the fine aluminum particles into aluminum sheet metal again.

8. The overhaul slag ash recovery device of claim 6, wherein the third screen is a cyclone separator.

9. The overhaul slag ash recovery device of claim 1, wherein the batching unit is comprised of a calcium oxide supply section, a calcium carbonate supply section, and a high alumina calcium fly ash supply section each of which is fitted with a feed valve.

10. The recycling device for the overhaul slag ash as claimed in claim 1, wherein the extrusion pressure of the extrusion granulation mechanism during granulation is 50 to 100 tons.