CN109609717A - A kind of converter steel-smelting technique using porous oxygen lance - Google Patents
A kind of converter steel-smelting technique using porous oxygen lance Download PDFInfo
- Publication number
- CN109609717A CN109609717A CN201811415015.9A CN201811415015A CN109609717A CN 109609717 A CN109609717 A CN 109609717A CN 201811415015 A CN201811415015 A CN 201811415015A CN 109609717 A CN109609717 A CN 109609717A
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- Prior art keywords
- steel
- oxygen
- converter
- scrap
- porous
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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
-
- 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
- C21C5/30—Regulating or controlling the blowing
-
- 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
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
-
- 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
Abstract
The present invention provides a kind of converter steel-smelting technique using porous oxygen lance, and porous oxygen lance is a kind of pneumatic steelmaking equipment with burning and two kinds of functions of oxygen blast.It is made of four layers of casing, and blowing combustion gas and oxygen in converter, combustion gas and part of oxygen are burnt, and thermal-flame is formed, and issues a large amount of heat, melting waste steel, heated molten bath；Supersonic speed core flow stock in oxygen, the steel-making of blowing molten bath.The gas jet orifice of porous oxygen lance is identical with the number of oxygen spray orifice or is in certain multiple, there is three holes, four holes, five holes, six holes and its certain multiple.Using the converter steel-smelting technique of porous oxygen lance, the scrap ratio of converter can achieve 40% or more or even 100% steel scrap, can also make steel.New process can reduce steel-making cost, increase the yield of steel, improve the quality of steel.Through the invention, to solve the problems, such as that traditional pneumatic steelmaking scrap ratio of the existing technology cannot increase substantially.
Description
Technical field
The present invention relates to a kind of converter steeling technology fields, and in particular to a kind of pneumatic steelmaking using porous oxygen lance is new
Technique.
Background technique
Oxygen rifle top-blown converter is current steelmaking equipment most important in the world.By the way that the converter oxygen above converter is arranged in
Rifle, the oxygen blast into converter, refined molten steel are made steel.
Currently, the general converter oxygen gun in various countries is made of three layers of casing, this oxygen rifle only has oxygen blown function.Pass through oxygen
The elements such as carbon, silicon, manganese, phosphorus, sulphur and iron in gas and molten iron, are chemically reacted, heat release is made steel.In addition to the interior energy of molten iron
Except, external heat source cannot be brought into.
The output of steel in China is every year up to 800,000,000 tons or more, and with the development of industrialization, the steel scrap in society is more and more.
On the other hand, the limitation due to country to steel production capacity, ironmaking ability can not can increase.
The raw material of pneumatic steelmaking, is made of molten iron and steel scrap.Molten iron and steel scrap are proportionally added into converter.Conventional converter
Process for making, when scrap ratio 15% or so, carbon temperature is than balance, when tapping, reaches the tapping temperature of requirement.
Ironmaking ability is limited, the steel scrap in society and more and more, " high scrap ratio process for making " and " full steel scrap steelmaker
Skill " is the developing direction of converter steelmaking process and the emphasis of scientific research.
A large amount of steel scraps are added in converter, liquid steel temperature will reduce, and tapping temperature requirement be not achieved, pneumatic steelmaking can not
It carries out.
Currently, pneumatic steelmaking both at home and abroad increases steel scrap charge weight, following measures are mainly taken:
1, the steel scrap after heating is packed into converter by scrap heating outside converter, then hot metal charging, with general converter oxygen
Rifle steel-making.Converter steel scrap charge weight can be improved in this technique, but steel scrap, in furnace external heat, the temperature of limited amount, heating has
Limit, scrap ratio cannot increase substantially.
2, steel scrap is packed into converter, heats steel scrap with the thermal-flame of burner.This technique can be mentioned significantly
High converter steel scrap charge weight, but steel scrap heats in converter, to occupy many times, reduces the operating rate of converter, influences steel
Yield.
Summary of the invention
For the deficiency of existing converter steelmaking process functionally, the present invention provides a kind of converter refining using porous oxygen lance
Steel new process.
The present invention provides a kind of high scrap ratio converter steel-smelting technique using porous oxygen lance, is existed using porous oxygen lance
It makes steel in converter, rather than is made steel using general common converter oxygen rifle, operational process of craft is as follows:
A, it according to steel scrap quantity, molten iron quantity, combustion gas calorific capacity and duration of blast parameter, is designed and calculates porous oxygen combustion
Hole count, gas flow and the oxygen flow of rifle；
B, converter fills steel scrap, and hot metal charging adds slag former, and then rifle blows under the porous oxygen lance of application；In the blowing of setting
In time, blowing is finished, and carbon temperature is qualified, and metal component is qualified, tapping.
The scrap ratio of high scrap ratio converter steel-smelting technique be 30% or 40% or 50% or 60% or 70% or
80%.
The present invention provides also a kind of full steel scrap converter steel-smelting technique using porous oxygen lance, is existed using porous oxygen lance
It makes steel in converter, rather than is made steel using general common converter oxygen rifle, operational process of craft is as follows:
A, according to parameters such as steel scrap quantity, combustion gas calorific capacity and duration of blast, it is designed the hole for calculating porous oxygen lance
Number, gas flow and oxygen flow；
B, converter dress steel scrap and certain exothermic material, add slag former, and then rifle blows under the porous oxygen lance of application, will be more
The gas flow and oxygen flow of hole oxygen lance are opened to the maximum value of design, formed when whole scrap meltings, in converter molten bath it
Afterwards, gas flow to be turned down, corresponding oxygen flow will also carry out adjustment appropriate, continues to blow, until carbon temperature is qualified, metal
Ingredient is qualified, tapping.
Requirement of the technique to combustion gas are as follows: combustion gas is natural gas, liquefied petroleum gas or coke oven combustion gas, pressure >=0.3Mpa.
The exothermic material refers to coal cinder or coke briquette, and effect is after scrap melting, containing a certain amount of in molten steel
Phosphorus content.
Porous oxygen lance used by high scrap ratio and full steel scrap converter steel-smelting technique has burning and two kinds of function of oxygen blast
Can, it is made of four layers of casing, four layers of casing are sequentially formed from inside to outside into oxygen channel, blast tube, cooling water intake tunnel
With the backwater channel of cooling water, oxygen lance spray head in into oxygen channel, blast tube head outlet corresponding position set respectively oxygen spray
Hole and gas jet orifice are connected between intake tunnel and backwater channel by oxygen lance spray head, blowing combustion gas and oxygen in converter,
Combustion gas and part of oxygen are burnt, and thermal-flame is formed, and issue a large amount of heat, melting waste steel, heated molten bath；Supersonic in oxygen
Fast core flow stock, the steel-making of blowing molten bath.
The oxygen spray orifice is identical with the number of gas jet orifice or is in certain multiple, and oxygen spray orifice is in inner, gas jet orifice
It is looped around around oxygen spray orifice or gas jet orifice is inner, oxygen spray orifice is looped around around gas jet orifice, and nozzle hole number is
Three holes, four holes, five holes, six holes and its certain multiple.
Bring of the present invention is more the utility model has the advantages that the present invention provides a kind of converter steel-smelting technique using porous oxygen lance
Hole oxygen lance is a kind of pneumatic steelmaking equipment with burning and two kinds of functions of oxygen blast, it is made of four layers of casing, in converter
It is blown combustion gas and oxygen, combustion gas and part of oxygen are burnt, formation thermal-flame, issue a large amount of heat, melting waste steel, and heating is melted
Pond；Supersonic speed core flow stock in oxygen, the steel-making of blowing molten bath.Pneumatic steelmaking provided by the invention using porous oxygen lance is new
Technique, the scrap ratio of converter can achieve 40% or more or even 100% steel scrap, can also make steel.New process can reduce refining
Steel cost increases the yield of steel, improves the quality of steel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the porous oxygen lance of the embodiment of the present invention.
Wherein, 1- is into oxygen channel, 2- blast tube, 3- intake tunnel, 4- backwater channel, 5- oxygen lance spray head, 6- combustion
Gas spurt, 7- oxygen spray orifice, 8- is into oxygen manifold, and 9- is into combustion gas branch pipe, 10- water inlet pipe, 11- return branch.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and the specific embodiments, to this
Invention is described in further detail.
Fig. 1 is the structural schematic diagram of the porous oxygen lance of the embodiment of the present invention.
The present invention provides a kind of converter steel-smelting technique using porous oxygen lance, and porous oxygen lance is a kind of with burning
With the pneumatic steelmaking equipment of two kinds of functions of oxygen blast.It is made of four layers of casing, and four layers of casing are sequentially formed from inside to outside into oxygen
Channel 1, blast tube 2, cooling water intake tunnel 3 and cooling water backwater channel 4, oxygen lance spray head 5 in into oxygen channel, combustion
Gas channel head outlet corresponding position sets oxygen spray orifice 7 and gas jet orifice 6 respectively, is fired between intake tunnel and backwater channel by oxygen
Gun sprayer connection, be disposed in oxygen lance gun body with into oxygen channel 1 be connected into oxygen manifold 8 and the company of blast tube 2
It is logical into combustion gas branch pipe 9, the water inlet pipe 10 being connected to cooling water intake tunnel 3, the return branch being connected to backwater channel 4
11, blowing combustion gas and oxygen in converter, combustion gas and part of oxygen are burnt, and thermal-flame is formed, and issue a large amount of heat, fusing
Steel scrap, heated molten bath；Supersonic speed core flow stock in oxygen, the steel-making of blowing molten bath.The gas jet orifice and oxygen of porous oxygen lance
The number of spray orifice is identical or is in certain multiple, has three holes, four holes, five holes, six holes and its certain multiple, oxygen spray orifice is in inner, combustion
Gas spurt is looped around around oxygen spray orifice or gas jet orifice is inner, and oxygen spray orifice is looped around around gas jet orifice.
New process is that a large amount of steel scraps are added in converter, and steel scrap does not have to heat without in furnace, iron making in furnace external heat
Water adds slag material, immediately using rifle melting waste steel under porous oxygen lance, while also heating molten iron and clinker.Oxygen stream stock center
Supersonic speed core oxygen stream, be blown molten iron and clinker, the elements such as carbon, silicon, manganese, phosphorus, sulphur and iron in oxygen and molten iron carry out
Chemical reaction, stirs molten iron and clinker, heat release are made steel.
According to the size of converter tonnage, the hole count of porous oxygen lance, have has less more, there is 3 holes or 4 holes or 5 holes or 6 holes.
The adjoint stream of one oxygen stream stock and combustion gas stream stock is sprayed in every hole.
Two kinds of refinings can be divided into according to the number of converter steel scrap charge weight using the converter steel-smelting technique of porous oxygen lance
Steel technique:
1, high scrap ratio process for making
Scrap ratio is 30% or 40% or 50% or 60% or 70% or 80%.
Hole count, gas flow and the oxygen flow of porous oxygen lance will generate heat according to steel scrap quantity, molten iron quantity, combustion gas
The parameters such as value and duration of blast, are designed calculating.
Converter fills steel scrap, and hot metal charging adds slag former, and then rifle blows under the porous oxygen lance of application.In the blowing of setting
In, blowing finishes, and carbon temperature is qualified, and metal component is qualified, tapping.
Without first heating steel scrap, the steel-making each process time carries out as required, and converter operating rate is guaranteed.
2, full steel scrap process for making
Hole count, gas flow and the oxygen flow of porous oxygen lance, be according to steel scrap quantity, combustion gas calorific capacity and when blowing
Between etc. parameters, be designed calculating.
Converter fills steel scrap and certain exothermic material, adds slag former, and then rifle blows under the porous oxygen lance of application.It will be porous
The gas flow and oxygen flow of oxygen lance are opened to the maximum value of design, after forming molten bath in whole scrap meltings, converter,
Gas flow is turned down, corresponding oxygen flow will also carry out adjustment appropriate, continue to blow, until carbon temperature qualification, metal at
Division lattice, tapping.
To combustion gas requirement: the combustion gas of the high calorific capacity such as natural gas, liquefied petroleum gas, coke oven combustion gas, pressure >=0.3Mpa
Exothermic material, refers to coal cinder, coke briquette etc., and effect is after scrap melting, containing a certain amount of carbon containing in molten steel
Amount.
Converter steel-smelting technique provided by the invention using porous oxygen lance, the scrap ratio of converter can achieve 40% with
On in addition 100% steel scrap, can also make steel.New process can reduce steel-making cost, increase the yield of steel, improve the matter of steel
Amount, and have the advantage that
1, the porous oxygen lance of converter application, oxygen and fuel gas buring form thermal-flame, and issue a large amount of heat, heat
Melt a large amount of steel scrap.
The scrap ratio of converter can achieve 40% or more or even 100% steel scrap, can also make steel.This is insufficient to molten iron,
Even without the steel mill of molten iron, it can largely increase the yield of steel.
2, due to scrap ratio molten iron environmental protection, steelmaking process is short, increases steel scrap charge weight, reduces molten iron charge weight, can drop
Low steel-making cost.
3, slag melting fast due to flame temperature height, the steel-making time can be shortened, increase output of steel.
4, since slugging is fast, slugging is good, is conducive to remove impurity in steel, improves the quality of steel.
5, due to that when liquid steel temperature is low, can be rapidly heated with heating function, be conducive to going on smoothly for steel-making.
6, combustion gas sprays together with oxygen, and flame temperature is high, and oxygen stream stock is rigidly good, strong to the penetration capacity in molten bath,
Stirring capacity is strong, and being conducive to molten steel in converter, temperature is uniform up and down.
7, oxygen is strong to the penetration capacity in molten bath, then splash is small, is conducive to the lining durability for improving converter.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (7)
1. a kind of high scrap ratio converter steel-smelting technique using porous oxygen lance, which is characterized in that existed using porous oxygen lance
It makes steel in converter, rather than is made steel using general common converter oxygen rifle, operational process of craft is as follows:
A, it according to steel scrap quantity, molten iron quantity, combustion gas calorific capacity and duration of blast parameter, is designed and calculates porous oxygen lance
Hole count, gas flow and oxygen flow；
B, converter fills steel scrap, and hot metal charging adds slag former, and then rifle blows under the porous oxygen lance of application；In the duration of blast of setting
Interior, blowing finishes, and carbon temperature is qualified, and metal component is qualified, tapping.
2. applying the high scrap ratio converter steel-smelting technique of porous oxygen lance as described in claim 1, which is characterized in that height is useless
Steel is 30% or 40% or 50% or 60% or 70% or 80% than the scrap ratio of converter steel-smelting technique.
3. a kind of full steel scrap converter steel-smelting technique using porous oxygen lance, which is characterized in that turned using porous oxygen lance
It makes steel on furnace, rather than is made steel using general common converter oxygen rifle, operational process of craft is as follows:
A, according to parameters such as steel scrap quantity, combustion gas calorific capacity and duration of blast, the hole count for calculating porous oxygen lance, combustion are designed
Throughput and oxygen flow；
B, converter dress steel scrap and certain exothermic material, add slag former, and then rifle blows under the porous oxygen lance of application, by porous oxygen
The gas flow and oxygen flow for firing rifle are opened to the maximum value of design, will after forming molten bath in whole scrap meltings, converter
Gas flow is turned down, and corresponding oxygen flow will also carry out adjustment appropriate, continues to blow, until carbon temperature is qualified, metal component
Qualification, tapping.
4. applying the full steel scrap converter steel-smelting technique of porous oxygen lance as claimed in claim 3, which is characterized in that technique pair
The requirement of combustion gas are as follows: combustion gas is natural gas, liquefied petroleum gas or coke oven combustion gas, pressure >=0.3Mpa.
5. converter steel-smelting technique as claimed in claim 3, which is characterized in that the exothermic material refers to coal cinder or coke
Block, effect are to contain a certain amount of phosphorus content in molten steel after scrap melting.
6. converter steel-smelting technique as claimed in claim 1 or 3, which is characterized in that porous oxygen lance employed in technique
Have the function of burning and two kinds of oxygen blast, be made of four layers of casing, four layers of casing sequentially form from inside to outside into oxygen channel (1),
The backwater channel (4) of blast tube (2), cooling water intake tunnel (3) and cooling water, oxygen lance spray head in into oxygen channel, combustion
Gas channel head outlet corresponding position sets oxygen spray orifice (7) and gas jet orifice (6) respectively, passes through between intake tunnel and backwater channel
The connection of oxygen lance spray head, blowing combustion gas and oxygen in converter, combustion gas and part of oxygen are burnt, and are formed thermal-flame, are issued
A large amount of heat, melting waste steel, heated molten bath；Supersonic speed core flow stock in oxygen, the steel-making of blowing molten bath.
7. converter steel-smelting technique as claimed in claim 6, which is characterized in that the number of the oxygen spray orifice and gas jet orifice
Mesh is identical or is in certain multiple, and oxygen spray orifice is inner, and gas jet orifice is looped around around oxygen spray orifice or gas jet orifice is inner,
Oxygen spray orifice is looped around around gas jet orifice, and nozzle hole number is three holes, four holes, five holes, six holes and its certain multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811415015.9A CN109609717A (en) | 2018-11-26 | 2018-11-26 | A kind of converter steel-smelting technique using porous oxygen lance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811415015.9A CN109609717A (en) | 2018-11-26 | 2018-11-26 | A kind of converter steel-smelting technique using porous oxygen lance |
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| CN109609717A true CN109609717A (en) | 2019-04-12 |
Family
ID=66004967
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| CN201811415015.9A Pending CN109609717A (en) | 2018-11-26 | 2018-11-26 | A kind of converter steel-smelting technique using porous oxygen lance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254250A (en) * | 2020-01-21 | 2020-06-09 | 鞍钢股份有限公司 | Smelting method for improving converter scrap steel ratio |
| CN111378809A (en) * | 2020-05-06 | 2020-07-07 | 江苏必瑞驰科技有限公司 | Equipment and method for electric arc furnace steelmaking by using oxygen combustion lance |
| CN115232911A (en) * | 2022-06-17 | 2022-10-25 | 中钢集团鞍山热能研究院有限公司 | Hot air spray gun for steelmaking and blowing process thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254250A (en) * | 2020-01-21 | 2020-06-09 | 鞍钢股份有限公司 | Smelting method for improving converter scrap steel ratio |
| CN111378809A (en) * | 2020-05-06 | 2020-07-07 | 江苏必瑞驰科技有限公司 | Equipment and method for electric arc furnace steelmaking by using oxygen combustion lance |
| CN115232911A (en) * | 2022-06-17 | 2022-10-25 | 中钢集团鞍山热能研究院有限公司 | Hot air spray gun for steelmaking and blowing process thereof |
| CN115232911B (en) * | 2022-06-17 | 2023-11-07 | 中钢集团鞍山热能研究院有限公司 | Hot air spray gun for steelmaking and converting process thereof |
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Application publication date: 20190412 |