CN115254319A - Device and method for separating primary large-scale graphite from molten iron pretreatment desulphurization slag - Google Patents
Device and method for separating primary large-scale graphite from molten iron pretreatment desulphurization slag Download PDFInfo
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- CN115254319A CN115254319A CN202210719245.4A CN202210719245A CN115254319A CN 115254319 A CN115254319 A CN 115254319A CN 202210719245 A CN202210719245 A CN 202210719245A CN 115254319 A CN115254319 A CN 115254319A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 68
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000002893 slag Substances 0.000 title claims abstract description 66
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 65
- 239000010439 graphite Substances 0.000 title claims abstract description 65
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000006477 desulfuration reaction Methods 0.000 claims description 37
- 230000023556 desulfurization Effects 0.000 claims description 37
- 238000007664 blowing Methods 0.000 claims description 12
- 238000000498 ball milling Methods 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 9
- 239000007921 spray Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000005188 flotation Methods 0.000 description 5
- 238000007885 magnetic separation Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910021382 natural graphite Inorganic materials 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/1835—Discharging devices combined with sorting or separating of material
- B02C17/185—Discharging devices combined with sorting or separating of material with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/186—Adding fluid, other than for crushing by fluid energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/215—Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of molten iron desulphurization, in particular to a device and a method for separating large native scale graphite from molten iron pretreatment desulphurization slag. The invention can protectively recover the primary large scale graphite in the desulphurization slag, avoid the physical damage of extraction equipment such as a ball mill and the like and an extraction process flow and protect the primary shape and size of the large scale.
Description
Technical Field
The invention relates to the technical field of molten iron desulphurization, in particular to a device and a method for separating primary large scale graphite from molten iron pretreatment desulphurization slag.
Background
The steel-making desulphurization slag is waste slag generated in the process of carrying out pre-desulphurization treatment on molten iron before the molten iron enters a converter. After the pre-desulfurization treatment is finished, the generated dry and thick slag floats to the surface of molten iron and is mixed with a small amount of blast furnace slag in a ladle, then slagging off is carried out, the tapped desulfurized slag enters a slag pot to become a main body part of the desulfurized slag, and in addition, more or less molten iron or iron beads in the slagging off process fall into the slag pot along with the slagging off process and are deposited at the bottom of the pot to become another component part of the desulfurized slag. The desulfurization slag has higher sulfur mass fraction, the iron mass fraction is larger than that of slag steel, the hardness is large, the desulfurization slag is not easy to break, and the desulfurization slag is directly not economical in takeaway economy, so that a steel enterprise generally carries out breaking, magnetic separation and screening firstly, nonmagnetic tailings after the magnetic separation can be used as a cement raw material or a road building filling material in a cement plant, and granular iron, iron concentrate powder, tailings and the like separated by ball milling are used for sintering ore preparation and the like.
Meanwhile, in the molten iron pretreatment process, the carbon element in the molten iron is supersaturated due to the change of the hot history of the molten iron temperature and the related physical kinetic energy conditions, so that aggregated crystalline flake graphite with different proportions is precipitated, and the graphite has the same performance as natural graphite after being purified, can be used in the fields of tire recarburization, lubrication and the like, and has better service performance than the natural graphite in certain specific fields. For a long period of time, these precipitated graphite is mixed with slag, ash, etc., and has been ignored as a waste material. Even with the prior art, studies have been conducted only on the conditions for forming graphite. In recent years, as high-grade, well-floated and purified natural graphite ore has also entered the post-development stage, technical researchers have gradually started to pay attention to the recycling of aggregated (flake) graphite in the desulfurization slag.
The value of the graphite is reflected in the size of the graphite flake, and the larger the flake is, the lower the friction coefficient is, the better the floatability, lubricity, plasticity and other properties are, and the higher the value is. In the production of flake graphite, large flake graphite can only be extracted from raw ores, the large flake graphite cannot be produced and synthesized by modern industrial technology, and the flake cannot be recovered once being damaged. In recent years, in the process of separating and extracting graphite in the desulfurization slag, the desulfurization slag is generally subjected to step-by-step ball milling, step-by-step flotation, step-by-step separation and extraction, and drying and then recovered to obtain a graphite product, but in the treatment process, particularly in the step-by-step ball milling process, the primary large scale is greatly damaged, the proportion of the large scale graphite is influenced, and the valuable primary large scale graphite has no recoverable resource loss.
Disclosure of Invention
Aiming at the technical problem of extraction of large-scale graphite damaged by ball milling in the prior art, the invention provides a device and a method for separating primary large-scale graphite from molten iron pretreatment desulphurization slag.
The invention provides a device for separating large scale graphite from molten iron pretreatment desulphurization slag, which comprises a storage bin, a vibrating screen, a conveying belt, a ball mill, a drum dryer, a fan, a collecting elbow and a collecting box, wherein a feed inlet of the vibrating screen is positioned under a discharge outlet of the storage bin, a discharge outlet of the vibrating screen is connected with a feed inlet of the drum dryer, a discharge outlet of the drum dryer is positioned over a feed end of the conveying belt, a discharge end of the conveying belt is positioned over a feed inlet of the ball mill, a feed end of the collecting elbow is positioned between the discharge outlet of the drum dryer and the feed end of the conveying belt, a discharge end of the collecting elbow is connected with the collecting box, and an air outlet of the fan is arranged at a position capable of blowing the feed end of the collecting elbow.
Further, the feeding end of the collecting elbow is in a horn shape, and the collecting of blown graphite is facilitated.
Furthermore, a plurality of spray headers are arranged on the top plate in the collecting box, the spray headers are connected with an external water supply device, and the graphite powder entering the collecting box can be sprayed and settled, so that the graphite powder can be collected.
Furthermore, a tail gas outlet communicated with the inside of the collecting box is arranged on the shell outside the collecting box.
Further, be equipped with the filter screen that is used for filtering tail gas outlet exhaust tail gas in the collecting box, the filter screen can filter spun tail gas on being fixed in the inside wall of collecting box, prevents that the graphite of being collected from overflowing.
In a second aspect, the invention provides a method for separating primary large scale graphite from molten iron pretreatment desulphurization slag, which comprises the following steps:
s1, starting a fan, discharging a storage bin storing desulfurized slag, and drying desulfurized slag in a drum dryer after the desulfurized slag enters a vibrating screen for screening;
s2, the dried desulfurization residues fall to the feed end of a conveying belt, and the conveying belt conveys the desulfurization residues to a ball mill for ball milling;
and S3, blowing the falling desulfurization slag by a fan, blowing the raw large scale graphite in the desulfurization slag into a collecting elbow pipe, and finally collecting the graphite in a collecting box.
Furthermore, the rotating speed of the fan is 800-900 r/min.
Further, in the step S3, the primary large scale graphite entering the collecting box is sprayed, settled and collected.
The principle of the invention is that the added roller dryer with the drying function fully dries the desulphurization slag, then uses the physical characteristics of soft, slippery and easy flying of large scale graphite, adopts a fan to sweep and separate the large scale graphite, and enters a collection box through a collection bent pipe, the collection box is provided with a filter screen, the top of the collection box is provided with a spray header, after spraying and filtering, the large scale graphite is settled in the collection box, and tail gas is discharged out of the collection box and enters a dust removal pipeline. And recovering and protecting the primary large-scale graphite subjected to purging separation for the first time, then performing ball milling, water flushing, magnetic separation and screening on the desulphurization slag, separating iron slag particles, recycling metal, performing step-by-step flotation, step-by-step extraction and drying on graphite slurry subjected to water flushing, and recovering the residual smaller-scale graphite. The graphite obtained by sweeping, separating and filtering contains certain dust impurities, and can be independently subjected to flotation and extraction; meanwhile, the rotating speed of the blowing fan can be adjusted according to requirements, and the rotating speed of the blowing fan influences the size, proportion and impurity content of the blown separated graphite flakes.
The method has the beneficial effects that the primary large scale graphite in the desulphurization slag can be protectively recovered at the first time, the physical damage of extraction equipment such as a ball mill and the like and an extraction process flow is avoided, the primary form and size of the large scale are protected, the proportion of the large scale graphite is obviously improved, and the economic benefit of extracting the graphite from the desulphurization slag is improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a process flow diagram of an embodiment of the present invention.
In the figure, 1-a storage bin, 2-a gate, 3-a vibrating screen, 4-a conveying belt, 5-a ball mill, 6-a ball mill material port, 7-a drum dryer, 8-a fan, 9-a collection port, 10-a collection elbow, 11-a collection box, 12-a filter screen, 13-a tail gas outlet and 14-a spray header.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the device for separating the large scale graphite from the molten iron pretreatment desulphurization slag comprises a storage bin 1, a vibrating screen 3, a conveying belt 4, a ball mill 5, a drum dryer 7, a fan 8, a collecting elbow 10 and a collecting box 11, wherein a feed inlet of the vibrating screen 3 is positioned under a discharge outlet of the storage bin 1, a discharge outlet of the vibrating screen 3 is connected with a feed inlet of the drum dryer 7, a discharge outlet of the drum dryer 7 is positioned over a feed end of the conveying belt 4, a discharge end of the conveying belt 4 is positioned over a ball mill feed inlet 6 of the ball mill 5, a feed end of the collecting elbow 10 is positioned between a discharge outlet of the drum dryer 7 and a feed end of the conveying belt 4, a discharge end of the collecting elbow 10 is connected with the collecting box 11, and an air outlet of the fan 8 is arranged at a position capable of blowing the feed end of the collecting elbow 10. A plurality of spray headers 14 are arranged on the inner top plate of the collecting box 11. The feeding end of the collecting elbow pipe 10 is provided with a collecting opening 9, and the collecting opening 9 is in a horn shape.
The shell outside the collecting box 11 is provided with a tail gas outlet 13 communicated with the inside of the collecting box 11. A filter screen 12 for filtering the tail gas discharged from the tail gas outlet 13 is arranged in the collecting box 11, and the filter screen 12 is fixed on the inner side wall of the collecting box 11.
Example 2
Referring to fig. 2, the method for separating primary large scale graphite from molten iron pretreatment desulphurization slag according to the present invention comprises the following steps:
s1, starting a fan 8, wherein the rotating speed of the fan is 800r/min, opening a gate 2 of a storage bin 1 for storing desulfurization slag to discharge, screening the desulfurization slag by a vibrating screen 3, and then drying the desulfurization slag by a roller dryer 7, wherein a heat source of the roller dryer 7 adopts residue stewing waste heat steam;
s2, the dried desulfurization slag falls to the feeding end of a conveying belt 4, the conveying belt 4 conveys the desulfurization slag to a ball mill 5 for ball milling, water flushing, magnetic separation and screening are carried out after ball milling, slag iron particles are separated out for recycling of metal, and step-by-step flotation, step-by-step extraction and drying of graphite slurry containing water are carried out to recover graphite with smaller residual flakes;
s3, blowing the falling desulfurization slag by the fan 8, blowing the raw large-scale graphite in the desulfurization slag into the collecting elbow 10 and then into the collecting box 11, starting the spray header 14 to spray and settle the raw large-scale graphite, simultaneously filtering by the filter screen 12 and depositing in the collecting box 11 to obtain the raw large-scale graphite, wherein the proportion of the large-scale graphite with the particle size of more than 80 meshes is 65%.
Example 3
The method for separating the primary large scale graphite from the molten iron pretreatment desulphurization slag comprises the following steps:
s1, starting a fan 8, wherein the rotating speed of the fan is 900r/min, opening a gate 2 of a storage bin 1 for storing desulfurization slag to discharge, screening the desulfurization slag by a vibrating screen 3, and then drying the desulfurization slag by a roller dryer 7, wherein a heat source of the roller dryer 7 adopts residue stewing waste heat steam;
s2, the dried desulfurization slag falls to the feeding end of a conveying belt 4, the conveying belt 4 conveys the desulfurization slag to a ball mill 5 for ball milling, water flushing, magnetic separation and screening are carried out after ball milling, slag iron particles are separated out for recycling of metal, and step-by-step flotation, step-by-step extraction and drying of graphite slurry containing water are carried out to recover graphite with smaller residual flakes;
s3, blowing the falling desulfurization slag by the fan 8, blowing the raw large-scale graphite in the desulfurization slag into the collecting elbow 10 and then into the collecting box 11, starting the spray header 14 to spray and settle the raw large-scale graphite, simultaneously filtering by the filter screen 12 and depositing in the collecting box 11 to obtain the raw large-scale graphite, wherein the proportion of the large-scale graphite with the particle size of more than 80 meshes is 60%.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention.
Claims (8)
1. The utility model provides a device of primary large scale graphite of follow separation in molten iron pretreatment of desulfurization sediment, including the feed bin, the shale shaker, conveyor belt, the ball mill, a serial communication port, still include the cylinder drying-machine, the fan, collect the return bend, the collecting box, the shale shaker feed inlet is located the feed bin discharge gate under, the shale shaker discharge gate is connected with cylinder drying-machine feed inlet, cylinder drying-machine discharge gate is located conveyor belt feed end directly over, the conveyor belt discharge end is located the ball mill feed inlet directly over, the feed end of collecting the return bend is located between cylinder drying-machine discharge gate and the conveyor belt feed end, the collecting box is connected to the discharge end of collecting the return bend, the fan air outlet is located the position that can spout collection return bend feed end.
2. The apparatus for separating crude large scale graphite from molten iron pretreatment desulfurization slag according to claim 1, wherein the inlet end of the collection elbow is flared.
3. The apparatus for separating crude large scale graphite from molten iron pretreatment desulfurization slag according to claim 1, wherein a plurality of showers are provided on the ceiling inside the collection box.
4. The apparatus for separating crude large scale graphite from molten iron pretreatment desulfurization slag according to claim 1, wherein the outer shell of the collection tank is provided with a tail gas outlet communicating with the inside of the collection tank.
5. The apparatus for separating crude large scale graphite from molten iron pretreatment desulfurization slag according to claim 4, wherein a filter screen for filtering the exhaust gas discharged from the exhaust gas outlet is provided in the collection tank, and the filter screen is fixed to the inner side wall of the collection tank.
6. A method for separating primary large scale graphite from molten iron pretreatment desulfurization slag using the apparatus of claim 1, characterized by comprising the steps of:
s1, starting a fan, discharging a storage bin storing desulfurized slag, and drying desulfurized slag in a drum dryer after the desulfurized slag enters a vibrating screen for screening;
s2, the dried desulfurization residues fall to the feed end of a conveying belt, and the conveying belt conveys the desulfurization residues to a ball mill for ball milling;
and S3, blowing the falling desulfurization slag by a fan, blowing the raw large scale graphite in the desulfurization slag into a collecting elbow pipe, and finally collecting the graphite in a collecting box.
7. The method for separating primary large scale graphite from molten iron pretreatment desulfurization slag according to claim 6, wherein the rotation speed of the fan is 800 to 900r/min.
8. The method for separating the native large-scale graphite from the molten iron pretreatment desulfurization slag according to claim 6, wherein in step S3, the native large-scale graphite entering the collection tank is sprayed, settled and collected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719245.4A CN115254319B (en) | 2022-06-23 | 2022-06-23 | Device and method for separating primary large-scale graphite from molten iron pretreatment desulfurization slag |
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| CN202210719245.4A CN115254319B (en) | 2022-06-23 | 2022-06-23 | Device and method for separating primary large-scale graphite from molten iron pretreatment desulfurization slag |
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| CN115254319A true CN115254319A (en) | 2022-11-01 |
| CN115254319B CN115254319B (en) | 2023-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2139358C1 (en) * | 1996-06-26 | 1999-10-10 | Закрытое акционерное общество "ГЭМТК" | Method of processing of slag-graphite-metal wastes of metallurgical production and device for its embodiment |
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| CN103981304A (en) * | 2014-05-30 | 2014-08-13 | 苏州大学 | Regeneration method for molten iron desulphurization slag |
| CN105347336A (en) * | 2015-12-02 | 2016-02-24 | 王太进 | Slag iron graphite separating and purifying process |
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| CN109046756A (en) * | 2018-09-12 | 2018-12-21 | 山东泰东环保科技股份有限公司 | Graphite choosing method is enriched in steel desulfurization slag |
| CN213590798U (en) * | 2020-10-21 | 2021-07-02 | 苏州中材非金属矿工业设计研究院有限公司 | Graphite flake protection flotation device |
| CN215197307U (en) * | 2021-03-19 | 2021-12-17 | 许建民 | Dry-process magnetite iron concentrate powder production system |
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