CN114737018A - Consumable air gun for slagging off molten iron and use method - Google Patents
Consumable air gun for slagging off molten iron and use method Download PDFInfo
- Publication number
- CN114737018A CN114737018A CN202210494424.2A CN202210494424A CN114737018A CN 114737018 A CN114737018 A CN 114737018A CN 202210494424 A CN202210494424 A CN 202210494424A CN 114737018 A CN114737018 A CN 114737018A
- Authority
- CN
- China
- Prior art keywords
- air
- lance
- gas
- gun
- consumable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Analytical Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a consumable air gun for slagging off molten iron, which comprises an air nozzle, wherein the outer circumferential surface of the air nozzle is wrapped with a refractory layer, and the air gun is of a detachable structure and is formed by connecting a plurality of air nozzles end to end; one side of the air gun is parallel to the air gun and is provided with a supporting arm, the supporting arm is connected with the air gun through a holding component, and the holding component slides on the supporting arm to adjust the height of the air gun.
Description
Technical Field
The invention relates to the technical field of molten iron slagging-off, in particular to a consumable air gun for molten iron slagging-off and a using method thereof.
Background
In order to prevent the resulfurization phenomenon in the converter smelting process after the molten iron is desulfurized, the sulfur-containing top slag must be removed. In order to smoothly remove the desulfurized slag, the conventional method is to add a slag conglomeration agent, to make the desulfurized slag with good fluidity sticky, and then to intensively remove the desulfurized slag by using a manipulator, sometimes because the requirement of individual steel grade on sulfur content is strict, especially for the blowing pure magnesium powder desulfurization process, the slag is less in amount, and the slag conglomeration agent is often required to be added for multiple times, so that the consumption of the slag conglomeration agent is increased, and the molten iron scraping loss is increased.
In order to solve the problem, an air gun wrapped with refractory material for protection is inserted into the top of the molten iron tank, the molten iron is driven by the blowing gas to move from bottom to top, the top slag is pushed to a slag-raking opening by the naked molten iron, the slag raking is facilitated, and the service life of the air gun is less than 50 times per unit due to the erosion effect of the molten iron. Since the refractory is gradually consumed by the portion inserted into the molten iron, the entire lance needs to be replaced with a new one although the refractory is hardly consumed 1.5 to 2.0m above the molten iron level. Particularly, the length of the air gun for slagging off the molten iron is as long as about 6m due to the limitation of the height and the structure of the platform, but the actual molten iron part is only about 2m, when the whole gun is consumed 1/3, the depth of the air gun inserted below the liquid level of the molten iron cannot achieve the required blowing effect due to the shortened length of the gun body, the whole gun has to be replaced, the waste is huge, and the production cost is increased. Therefore, how to realize the overall use of the air gun has practical economic value.
The air-blowing slag-removing equipment for the molten iron pretreatment is arranged on a platform of a slag removing machine of a molten iron tank and comprises a guide rail, a rotary support, an adjustable support, a guide roller, a guide chain wheel, a lifting driving device, a lifting trolley, an air-blowing rod and a refractory material section, wherein when the slag removing machine works, the air-blowing rod is inserted into a molten iron ladle to blow nitrogen, the amount of slag is continuously reduced along with the slag removing process, the exposed surface of the molten iron is continuously enlarged until the slag is almost completely removed, an air-blowing gun of the method is obliquely inserted into the molten iron, so the whole gun cannot be completely wrapped by refractory materials, a mechanical clamping section is a metal rod, and the refractory material section is consumed or the whole gun is replaced or knotted again to form a refractory section, so that the maintenance is difficult and the cost is high;
the air gun used in the prior art is convenient to operate but large in loss after reaching the service life or being integrally replaced; or only the refractory sections are replaced, the loss is reduced, but the replacement is difficult. Aiming at the problems in the prior art, the invention provides a manufacturing and using method of a consumable air gun for slagging off molten iron, which realizes the purposes of effective use of the whole gun and quick and convenient connection.
Disclosure of Invention
The invention aims to provide a consumable air gun for slagging off molten iron, which adopts the consumable air gun to blow air, obviously improves the slagging-off efficiency and reduces the iron loss, and simultaneously ensures that each air gun is completely used and greatly reduces the use cost because the two detachable air nozzles are connected end to form the air gun.
The purpose of the invention can be realized by the following technical scheme:
a consumable gas lance for removing slag from molten iron comprises a gas lance tube, wherein a refractory layer is wrapped on the outer circumferential surface of the gas lance tube, and the gas lance tube is of a detachable structure and is formed by connecting a plurality of gas lance tubes end to end;
one side of the air gun is parallel to the air gun and is provided with a supporting arm, the supporting arm is connected with the air gun through a holding component, and the holding component adjusts the height of the air gun through sliding on the supporting arm.
As a further scheme of the invention: the flame retardant coating wraps the jet pipe, an inner groove is formed in one end of the jet pipe of the flame retardant coating, and an outer convex block is formed at the other end of the jet pipe.
As a further scheme of the invention: one end of the gas ejector pipe, which is positioned in the inner groove of the refractory layer, is fixedly connected with an upper gas ejector pipe baffle;
the gas ejector pipe is positioned at one end of the outer convex block of the refractory layer and is fixedly connected with a gas ejector pipe lower baffle 6-8cm away from the bottom of the gas ejector pipe.
As a further scheme of the invention: the upper baffle of the gas ejector pipe and the inner circumferential surface of the connected gas ejector pipe are both provided with internal threads at the concave end of the gas ejector pipe;
and the end of the gas ejector pipe connected with the gas ejector pipe lower baffle is provided with external threads at the convex end of the gas ejector pipe.
As a further scheme of the invention: and the female end internal threads of the gas injection pipe of every two adjacent gas injection pipes are in threaded connection with the male end external threads of the gas injection pipes.
As a further scheme of the invention: and a sealing gasket ring is arranged at the joint of the two gas injection pipes.
As a further scheme of the invention: the length of the internal thread of the concave end of the gas ejector pipe is larger than that of the external thread of the convex end of the gas ejector pipe.
As a further scheme of the invention: the refractory layer is filled with refractory materials.
As a further scheme of the invention: the holding component comprises a first sliding holder and a second sliding holder, and the first sliding holder and the second sliding holder act on the two connected gas injection pipes respectively.
As a further scheme of the invention: a use method of a consumable air gun for slagging off molten iron comprises the following use steps:
the method comprises the following steps: connecting two adjacent gas ejector pipes through threads, and enabling the gas ejector pipe upper baffle plate and the gas ejector pipe lower baffle plate of the adjacent gas ejector pipes to be in clamping contact;
step two: a sealing gasket ring is arranged at the joint of the outer convex block and the inner groove of two adjacent gas ejector pipes;
step three: when changing the gun, the internal threads at the concave end of the gas ejector pipe and the external threads at the convex end of the gas ejector pipe of the two connected gas ejector pipes are unscrewed firstly, and then the new gun is butted with the old gun end to end and screwed tightly;
step four: after connection, the first sliding holder is released and moved to the upper part of a new gun to be controlled and locked, the second sliding holder is moved to the lower part of the new gun to be controlled and locked, finally, the ends, connected with the supporting arms, of the first sliding holder and the second sliding holder are released, and under the action of gravity, the air gun drives the first sliding holder and the second sliding holder to move to the working holding positions of the supporting arms to be locked.
The invention has the beneficial effects that:
(1) the invention effectively solves the problem that the prior air gun can not be used effectively, greatly reduces the use cost, has flexible operation, is not limited by fields, and does not influence the normal operation of other equipment;
(2) according to the invention, through the design of the concave part at the upper end and the convex part at the lower end of the refractory material, the molten iron is effectively prevented from eroding the metal connecting part after the connecting part of the two air lances is immersed in the molten iron, and the complete use of the whole air lance is ensured;
(3) the invention ensures that the two air lances are completely sealed when connected through the design of the upper baffle plate, the lower baffle plate and the sealing gasket ring of the air lance, and improves the use safety.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a gas lance according to the invention;
FIG. 2 is a schematic view of the configuration of the air lance of the present invention;
FIG. 3 is a schematic structural view of a cross-sectional view A-A of FIG. 1;
FIG. 4 is a schematic structural view of a cross-sectional view B-B of FIG. 1;
FIG. 5 is a schematic view of the connection of the air gun of the present invention to a support arm.
In the figure: 1. a sealing gasket ring; 2. an upper baffle plate of the gas ejector pipe; 3. female threads at the concave end of the gas ejector pipe; 4. a gas ejector tube; 5. a refractory layer; 6. a gas ejector tube lower baffle; 7. the convex end of the gas ejector pipe is externally threaded; 10. a support arm; 11. a first sliding holder; 12. a second sliding holder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-4, the present invention is a consumable gas lance for slagging off molten iron, the gas lance is a detachable structure and is formed by connecting a plurality of gas lances 4 end to end, and a supporting arm 10 is disposed on one side of the gas lance in parallel with the gas lance, the supporting arm 10 is connected to the gas lance by a holding component, the holding component slides on the supporting arm 10 to adjust the height of the gas lance, in this embodiment, two gas lances 4 are specifically taken as an example for connection, and the gas lances 4 are seamless steel pipes;
specifically, the outer circumferential surface of each gas ejector pipe 4 is wrapped with a refractory layer 5, and the refractory layer 5 is filled with a refractory material;
the flame retardant coating 5 wraps the gas injection pipes 4, an inner groove is formed at one end of each gas injection pipe 4 by the flame retardant coating 5, an outer convex block is formed at the other end of each gas injection pipe 4, and taking two adjacent gas injection pipes 4 as an example, the inner groove of one gas injection pipe 4 is matched with the outer convex block of the other gas injection pipe;
wherein, the inner groove of the fire-resistant layer 5 is matched with the outer lug at an inclination angle of 3-10 degrees;
wherein the refractory material may be refractory mortar.
Specifically, one end of the gas ejector pipe 4, which is positioned in the inner groove of the refractory layer 5, is fixedly connected with a gas ejector pipe upper baffle 2 through welding; the gas ejector 4 is positioned at one end of the convex block outside the fire-resistant layer 5 and is fixedly connected with a gas ejector lower baffle 6 at a position 6-8cm away from the bottom of the gas ejector 4 by welding;
the jet pipe upper baffle 2 and the inner circumferential surfaces of the connected jet pipes 4 are provided with jet pipe concave end internal threads 3, one ends of the jet pipes 4, which are connected with the jet pipe lower baffle 6, are provided with jet pipe convex end external threads 7, the internal thread length of the jet pipe concave end internal threads 3 is greater than the external thread length of the jet pipe convex end external threads 7, so that the jet pipe concave end internal threads 3 of the adjacent two jet pipes 4 are in threaded connection with the jet pipe convex end external threads 7, and the jet pipe upper baffle 2 and the jet pipe lower baffle 6 can be effectively ensured to be in clamping contact;
in the process of threaded connection of the two gas injection pipes 4, the convex end of one gas injection pipe 4 is connected with the concave end of the other gas injection pipe 4 in a matching way;
and the joint of the two gas injection pipes 4 is provided with a sealing gasket ring 1, and the 1-position fireproof asbestos material of the sealing gasket ring effectively protects the fireproof material.
Referring to fig. 5, the holding assembly includes a first sliding holder 11 and a second sliding holder 12, the first sliding holder 11 and the second sliding holder 12 respectively act on two connected gas nozzles 4;
specifically, the first sliding holder 11 and the second sliding holder 12 have the same structure, and include a connecting rod, wherein two ends of the connecting rod are fixedly connected with a hoop, and the hoop is the hoop shown in patent application No. 201710120833.5;
specifically, when the air gun composed of two air injection pipes 4 is connected with the support arm 10, the first sliding holder 11 and the second sliding holder 12 fix different air injection pipes 4 respectively, so as to form locking and fixing of the two air injection pipes 4 on the support arm 10.
A use method of a consumable air gun for slagging off molten iron comprises the following use steps:
the method comprises the following steps: the gas ejector pipe 4 of the consumable gas ejector is a seamless steel pipe, the upper baffle 2 of the gas ejector pipe and the upper end of the gas ejector pipe 4 are provided with internal threads 3 at the concave end of the gas ejector pipe, and the length of the internal threads 3 at the concave end of the gas ejector pipe is more than 9 cm;
step two: the lower end of the gas ejector pipe 4 is provided with a gas ejector pipe convex end external thread 7, and the length of the external thread of the gas ejector pipe convex end external thread 7 is controlled to be 6-8cm so as to ensure that the gas ejector pipe upper baffle 2 and the gas ejector pipe lower baffle 6 can be clamped and contacted;
step three: the outer part of the gas ejector pipe 4 is wrapped with a refractory material to form a refractory layer 5, an inner groove at the upper end of the refractory layer 5 and an outer convex block at the lower end are matched with each other at an inclination angle of 3 degrees, refractory mortar is coated on the outer convex block, and the inner groove part is filled with a sealing gasket ring 1 made of asbestos;
step three: when changing the gun, firstly unscrewing the internal threads 3 at the concave end of the gas ejector pipe and the external threads 7 at the convex end of the gas ejector pipe of the two connected gas ejector pipes 4, and then butting and screwing the head and the tail of a new gun and an old gun;
step four: after connection, the first sliding holder 11 is released and moved to the upper part of a new gun to be held and locked, the second sliding holder 12 is moved to the lower part of the new gun to be held and locked, finally, the ends, connected with the supporting arm 10, of the first sliding holder 11 and the second sliding holder 12 are released, and under the action of gravity, the air gun drives the first sliding holder 11 and the second sliding holder 12 to move to the working holding position of the supporting arm 10 to be locked.
According to the method, a consumable air gun is adopted, the paint gun consists of the air spraying pipe 4 and refractory materials, and the refractory materials are made into a concave-convex head-tail structure to be matched, so that the air spraying pipe 4 is effectively prevented from being corroded by molten iron at the joint of the air gun; the upper baffle and the lower baffle of the gas injection pipe 4 are utilized to realize fastening and sealing, and the two old gas injection guns are connected end to realize the complete use of each gas injection gun; when the gun is replaced, the two holders on the supporting arm 10 are alternately loosened and tightened, and the new gun is aligned after replacement is finished.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A consumable air gun for slagging off molten iron comprises an air injection pipe (4), wherein the outer circumferential surface of the air injection pipe (4) is wrapped with a refractory layer (5), and the consumable air gun is characterized in that the air gun is of a detachable structure and is formed by connecting a plurality of air injection pipes (4) end to end;
one side of air gun is parallel to the air gun and is provided with support arm (10), be connected through holding the subassembly between support arm (10) and the air gun, hold the subassembly and realize adjusting the height of air gun through sliding on support arm (10).
2. The consumable air lance for slagging off molten iron according to claim 1, wherein the refractory layer (5) is formed with an inner groove at one end of the air lance (4) and an outer protrusion at the other end of the air lance (4).
3. The consumable gas lance for slagging off molten iron according to claim 2, wherein one end of the gas lance (4) positioned in the inner groove of the refractory layer (5) is fixedly connected with an upper gas lance baffle (2);
the gas injection pipe (4) is positioned at one end of the outer convex block of the fire-resistant layer (5) and is fixedly connected with a gas injection pipe lower baffle (6) at a position 6-8cm away from the bottom of the gas injection pipe (4).
4. The consumable air lance for slagging off molten iron according to claim 3, wherein the inner circumferential surfaces of the upper baffle plate (2) of the air lance and the connected air lance (4) are provided with female threads (3) at the concave end of the air lance;
and an outer thread (7) at the convex end of the gas injection pipe is arranged at one end of the gas injection pipe (4) connected with the gas injection pipe lower baffle (6).
5. The consumable air lance for slagging off molten iron according to claim 4, wherein the internal threads (3) at the concave end of the air lance of two adjacent air lances (4) are in threaded connection with the external threads (7) at the convex end of the air lance.
6. The consumable air lance for slagging off molten iron according to claim 5, wherein a sealing gasket ring (1) is arranged at the joint of the two air lances (4).
7. The consumable air lance for slagging off molten iron according to claim 5, wherein the length of the internal thread (3) at the concave end of the air lance is greater than the length of the external thread (7) at the convex end of the air lance.
8. The consumable gas lance defined in claim 1, wherein the refractory layer (5) is filled with refractory material.
9. The consumable hot metal slagging-off gas lance according to claim 1, wherein the holding assembly comprises a first sliding holder (11) and a second sliding holder (12), the first sliding holder (11) and the second sliding holder (12) acting on two connected gas injection pipes (4), respectively.
10. The use method of the consumable gas lance for slagging-off molten iron according to any one of claims 1 to 9 is characterized by comprising the following steps:
the method comprises the following steps: connecting two adjacent gas injection pipes (4) through threads, and enabling the gas injection pipe upper baffle (2) and the gas injection pipe lower baffle (6) of the adjacent gas injection pipes (4) to be in clamping contact;
step two: a sealing gasket ring (1) is arranged at the joint of the outer convex block and the inner groove of two adjacent gas ejector pipes (4);
step three: when changing the gun, firstly unscrewing the internal threads (3) at the concave end of the gas ejector pipe and the external threads (7) at the convex end of the gas ejector pipe of the two connected gas ejector pipes (4), and then butting and screwing the head and the tail of a new gun and an old gun;
step four: after connection, the first sliding holder (11) is released and moved to the upper part of a new gun to be held and locked, the second sliding holder (12) is moved to the lower part of the new gun to be held and locked, finally, the ends, connected with the supporting arms (10), of the first sliding holder (11) and the second sliding holder (12) are released, and under the action of gravity, the air gun drives the first sliding holder (11) and the second sliding holder (12) to move to the working holding positions of the supporting arms (10) to be locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494424.2A CN114737018A (en) | 2022-05-07 | 2022-05-07 | Consumable air gun for slagging off molten iron and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210494424.2A CN114737018A (en) | 2022-05-07 | 2022-05-07 | Consumable air gun for slagging off molten iron and use method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114737018A true CN114737018A (en) | 2022-07-12 |
Family
ID=82284792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210494424.2A Pending CN114737018A (en) | 2022-05-07 | 2022-05-07 | Consumable air gun for slagging off molten iron and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114737018A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070109A1 (en) * | 1981-07-08 | 1983-01-19 | Dyson Refractories Limited | Injection lances |
| JP2010031338A (en) * | 2008-07-30 | 2010-02-12 | Nippon Steel Corp | Method for operating converter |
| CN203007317U (en) * | 2012-12-11 | 2013-06-19 | 武汉榕盛科发冶金机械设备制造有限公司 | Blowing type slag accretion device |
| CN203972854U (en) * | 2014-07-10 | 2014-12-03 | 鞍钢民企机电检修公司 | Spring up the micro-damage system of the skimming cross jet gun of formula molten iron |
| CN204311083U (en) * | 2014-11-28 | 2015-05-06 | 鞍钢股份有限公司 | A kind of molten iron drossing combined jet air gun |
| CN104831013A (en) * | 2015-05-28 | 2015-08-12 | 中冶赛迪工程技术股份有限公司 | Slag blow-removal mechanism |
| CN104894336A (en) * | 2015-05-22 | 2015-09-09 | 武汉钢铁(集团)公司 | Insertion type molten iron slagging-off air blowing spray gun |
| CN107012279A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | It is a kind of to equal the molten iron drossing method blown and catch up with slag |
-
2022
- 2022-05-07 CN CN202210494424.2A patent/CN114737018A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070109A1 (en) * | 1981-07-08 | 1983-01-19 | Dyson Refractories Limited | Injection lances |
| JP2010031338A (en) * | 2008-07-30 | 2010-02-12 | Nippon Steel Corp | Method for operating converter |
| CN203007317U (en) * | 2012-12-11 | 2013-06-19 | 武汉榕盛科发冶金机械设备制造有限公司 | Blowing type slag accretion device |
| CN203972854U (en) * | 2014-07-10 | 2014-12-03 | 鞍钢民企机电检修公司 | Spring up the micro-damage system of the skimming cross jet gun of formula molten iron |
| CN204311083U (en) * | 2014-11-28 | 2015-05-06 | 鞍钢股份有限公司 | A kind of molten iron drossing combined jet air gun |
| CN104894336A (en) * | 2015-05-22 | 2015-09-09 | 武汉钢铁(集团)公司 | Insertion type molten iron slagging-off air blowing spray gun |
| CN104831013A (en) * | 2015-05-28 | 2015-08-12 | 中冶赛迪工程技术股份有限公司 | Slag blow-removal mechanism |
| CN107012279A (en) * | 2016-01-27 | 2017-08-04 | 鞍钢股份有限公司 | It is a kind of to equal the molten iron drossing method blown and catch up with slag |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110303261B (en) | All-position welding method for stainless steel pipeline for oil and gas transmission | |
| CN114737018A (en) | Consumable air gun for slagging off molten iron and use method | |
| CN204311083U (en) | A kind of molten iron drossing combined jet air gun | |
| CN2701872Y (en) | Hot metal desulfurization lance | |
| CN209065945U (en) | A kind of desulfurizing agent spray gun device | |
| CN107012279A (en) | It is a kind of to equal the molten iron drossing method blown and catch up with slag | |
| CN203972854U (en) | Spring up the micro-damage system of the skimming cross jet gun of formula molten iron | |
| CN215627652U (en) | Sealing protection device for crack of kiln shell of Maerz active lime kiln | |
| CN207362281U (en) | A kind of converter oxygen gun takes off slag device | |
| CN112941268A (en) | Production process of crack-free long-life composite desulfurization powder gun and powder gun structure | |
| CN105296709B (en) | One kind springs up formula molten iron drossing method | |
| CN212094315U (en) | Ladle lining material oozes and drips curing means | |
| CN216192472U (en) | Sectional type composite desulfurization spray gun | |
| CN1243623C (en) | Groved refroctory pouring tube for metallurgical casting, assembly of refractory commponents, casting installation and process for repairing surface of refractory component | |
| CN212894798U (en) | Desulfurization and recarburization composite spray gun for smelting reduction process | |
| CN212404150U (en) | Repairing tool for corroded part of converter steel tapping hole | |
| CN201534863U (en) | Molten steel air blow gun for LF | |
| CN111455128B (en) | Device for cooling accumulated slag under furnace and working method | |
| KR100977785B1 (en) | Mud injection device for repairing surface of tap hole | |
| CN210385794U (en) | Anticorrosion structure of quick sulfur melting tank of sulfur acid production sulfur melting system | |
| CN216192473U (en) | Novel three-stripping spray gun for pretreatment of molten iron in composite material pouring | |
| CN214694263U (en) | Combined type desulfurization powder gun | |
| CN218951428U (en) | Furnace door oxygen gun head | |
| CN211915494U (en) | Oxygen lance with ceramic coating | |
| CN220537846U (en) | Molten iron desulfurization spray gun |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |