CN106755670A - A kind of smelting process of vanadium titano-magnetite - Google Patents
A kind of smelting process of vanadium titano-magnetite Download PDFInfo
- Publication number
- CN106755670A CN106755670A CN201611154913.4A CN201611154913A CN106755670A CN 106755670 A CN106755670 A CN 106755670A CN 201611154913 A CN201611154913 A CN 201611154913A CN 106755670 A CN106755670 A CN 106755670A
- Authority
- CN
- China
- Prior art keywords
- smelting process
- ore
- gears
- chute
- falls
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The present invention discloses a kind of smelting process of vanadium titano-magnetite, and the smelting process includes：Burden distribution system is J33 3 31 3 29 3 27 2 20 2, K31 2 29 3 27 2 26 2；Wherein, what J was represented is coke, and what K was represented is ore, and the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, and digital subscript represents corresponding angle, the number of turns of numeric suffix respective notch respectively.The smelting process cloth is uniform, and gas fluid distrbution rationally, improves gas utilization rate, improves smelting strength of blast furnace, it is therefore prevented that furnace wall dross phenomenon.
Description
Technical field
The present invention relates to ironmaking technology field, and in particular to a kind of smelting process of vanadium titano-magnetite.
Background technology
Blast furnace is a kind of counter-current reactor, and coal gas is produced in bottom house, then rises through the bed of material；Furnace charge is from upper subordinate
Drop and coal gas effect, complete the smelting processes such as heating, reduction, slag making, fusing., in blast furnace from top to bottom, temperature is gradually for furnace charge
Raise, the layer structure until before fusing, being always maintained at furnace throat cloth.Ore layer is different with coke layer gas permeability, ore layer
Resistance ratios coke layer is big 10~20 times.
At present, blast furnace material distribution is typically carried out by the way of loading in mixture, is influenceed by factors such as raw material and fuel quality level changes, it is high
In process of production, the local Gas Flow more than coke relatively develops stove, thus charge-temperature rising is fast, it is difficult to ensure that blast furnace coal gas high
Utilization rate.
The content of the invention
In view of this, this application provides a kind of smelting process of vanadium titano-magnetite, the smelting process cloth is uniform, coal
Air flow method rationally, improves gas utilization rate, improves smelting strength of blast furnace, it is therefore prevented that furnace wall dross phenomenon.
To solve above technical problem, the technical scheme that the present invention is provided is a kind of smelting process of vanadium titano-magnetite, institute
Stating smelting process includes：Burden distribution system is J33 3 31 3 29 3 27 2 20 2, K31 2 29 3 27 2 26 2；Wherein, what J was represented is coke, and what K was represented is ore deposit
Stone, the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, digital subscript table
Show corresponding angle respectively, the number of turns of numeric suffix respective notch, the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4
Gear, 3 gears, 2 gears and 1 gear, corresponding angle is 33 °, 31 °, 29 °, 27 °, 26 ° and 20 ° respectively, in 6 gears
Put, when coke falls into, chute rotation 3 is enclosed；In 5 file locations, when coke falls into, chute rotation 3 is enclosed, when ore falls into, chute rotation
Turn 2 circles；In 4 file locations, when coke falls into, chute rotation 3 is enclosed, and when ore falls into, chute rotation 3 is enclosed；In 3 file locations, coke
When falling into, chute rotation 2 is enclosed, and when ore falls into, chute rotation 2 is enclosed；In 2 file locations, when ore falls into, chute rotation 2 is enclosed；
1 file location, when coke falls into, chute rotation 2 is enclosed.
Preferably, the ore is made up of large quantities of ore deposit ores and small quantities of ore deposit ore, large quantities of ore deposit ore particle diameters be 8~
16mm, small quantities of money ore particle diameter is 6~8mm.
Preferably, the smelting process also includes, large quantities of ore deposit ores and small quantities of ore deposit ore are mixed to get into the ore.
Preferably, 4.8~4.9t/t of methods described coke load.
Preferably, the smelting process also include control the ore radial edges to the distance of furnace wall be burner hearth internal diameter
1/9~1/5 carries out cloth.
Preferably, the smelting process also includes that it is to rotate in the direction of the clock or by inverse to control distributor chute direction of rotation
Clockwise rotates.
Preferably, the smelting process also includes at the uniform velocity being rotated using PLC control devices control chute.
Preferably, the smelting process method also includes controlling cooktop edge temperature for 140~210 DEG C, and central temperature is 400
~700 DEG C.
Preferably, the smelting process also includes control air supply parameter：Air quantity is 3310~3340Nm3/ min, air intake surface
Product is 0.235~0.245m3。
Preferably, the smelting process also includes that it is 1.6~2.0% to control oxygen enrichment percentage.
Preferably, the smelting process also includes that it is 175~195kpa to control furnace top pressure.
Preferably, the smelting process gas utilization rate is 51~52%.
Preferably, using cross temperature instrument determine the lip temperature and the central temperature, the lip temperature be by
The temperature of the nearly furnace wall, the central temperature is the temperature of top margin planar central.
Compared with prior art, its detailed description is as follows for the application：
Herein described ore is that small ore deposit described in 6~8mm batch ore is constituted by the big ore deposit batch ore and particle diameter, described small
The use of ore deposit batch ore, reduces the rate of return mine；There is the small ore deposit batch preferable stability coal gas is finely adjusted, the big ore deposit
It is ore deposit batch based on 8~16mm to criticize particle diameter, and cloth after big ore deposit batch and the mixing of small barrow is prevented because ore deposit batch change is excessive
Cause gas flow distribution unbalance, meanwhile, carry out cloth with coke again after first mixing the big ore deposit batch ore and the small ore deposit batch ore
Material, simplifies cloth flow, has saved and has got the raw materials ready and the feeding time, and then has improve blast furnace process efficiency.
The application burden distribution system combines the control to furnace roof central temperature and cooktop edge temperature, can form rational coal gas
Flow distribution, realizes the purpose of opening center, stabilised edge, reduces fuel ratio；Control furnace roof central temperature, it is to avoid central temperature mistake
Height causes center Gas Flow overweight, causes edge material speed to be slowly also easy to produce furnace wall dross, effectively controls coke ratio, it is to avoid central temperature
Caused by too low, the gas flow small furnace charge for causing in center is descending to have some setbacks, and improves smelting strength of blast furnace；Control lip temperature is low
In central temperature, it is to avoid the gas flow excessive furnace wall for causing in edge corrodes, and improves gas utilization rate and material speed, it is to avoid edge
Gas flow is too small, is susceptible to furnace wall dross knot thickness situation；Meanwhile, control the ore radial edges to be to the distance of furnace wall
The 1/9~1/5 of burner hearth internal diameter carries out cloth.So that edge coal gas circulates, blast furnace process efficiency is improved, improve coal gas utilization
Rate, effectively prevent furnace wall dross phenomenon.
The application controls distributor chute direction of rotation to rotate in the direction of the clock or rotating counterclockwise, uses
PLC control devices control chute at the uniform velocity rotates, it is ensured that cloth is uniform, beneficial to raising rate of driving.
Specific embodiment
In order that those skilled in the art more fully understands technical scheme, with reference to specific embodiment pair
The present invention is described in further detail.
Embodiment 1
A kind of smelting process of vanadium titano-magnetite includes：It is that the large quantities of ore deposit ores of 8~16mm and particle diameter are 6~8mm by particle diameter
Small quantities of money ore be mixed to get ore, according to burden distribution system J33 3 31 3 29 3 27 2 20 2, K31 2 29 3 27 2 26 2Carry out cloth；Wherein, J is represented
Be coke, what K was represented is ore, and the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears
And 1 gear, digital subscript represents corresponding angle, the number of turns of numeric suffix respective notch, the inclination angle of distributor chute respectively
Degree is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, respectively corresponding angle be 33 °, 31 °, 29 °,
27 °, 26 ° and 20 °, in 6 file locations, when coke falls into, chute rotation 3 is enclosed；In 5 file locations, when coke falls into, chute rotation
3 circles, when ore falls into, chute rotation 2 is enclosed；In 4 file locations, when coke falls into, chute rotation 3 is enclosed, when ore falls into, chute rotation
Turn 3 circles；In 3 file locations, when coke falls into, chute rotation 2 is enclosed, and when ore falls into, chute rotation 2 is enclosed；In 2 file locations, ore
When falling into, chute rotation 2 is enclosed；In 1 file location, when coke falls into, chute rotation 2 is enclosed.
Ore radial edges described in cloth process control are the 1/9 of burner hearth internal diameter to the distance of furnace wall, control distributor chute
At the uniform velocity revolved using PLC control devices control chute to rotate in the direction of the clock or rotating counterclockwise direction of rotation
Turn.After the completion of cloth, chute stops the rotation, and lifts chute, puts down stock rod, closes stream material regulating valve, and cloth terminates.
The lip temperature and the central temperature are determined using cross temperature instrument, the lip temperature is near the stove
The temperature of wall, the central temperature is the temperature of top margin planar central, and the lip temperature is 140 DEG C, and central temperature is 400
DEG C, furnace top pressure is 175kpa.Bottom adjustment process, controls air supply parameter：Air quantity is 3340Nm3/ min, incoming air area is
0.235m3.It is 1.8% to control oxygen enrichment percentage.
It is final to determine coke load 4.9t/t.The smelting process gas utilization rate is 51.2%, and coal compares 144kg/t
Fe, coke ratio is 412kg/tFe, ore deposit consumption 2011kg/tFe.
Embodiment 2
A kind of smelting side of vanadium titano-magnetite includes：Particle diameter is the large quantities of ore deposit ores of 8~16mm and particle diameter is 6~8mm's
Small quantities of money ore is mixed to get ore, according to burden distribution system J33 3 31 3 29 3 27 2 20 2, K31 2 29 3 27 2 26 2Carry out cloth；Wherein, J is represented
Coke, what K was represented is ore, the angle of inclination of distributor chute be divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears with
And 1 gear, digital subscript represents corresponding angle, the number of turns of numeric suffix respective notch, the angle of inclination of distributor chute respectively
Be divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, respectively corresponding angle be 33 °, 31 °, 29 °, 27 °,
26 ° and 20 °, in 6 file locations, when coke falls into, chute rotation 3 is enclosed；In 5 file locations, when coke falls into, chute rotation 3 is enclosed,
When ore falls into, chute rotation 2 is enclosed；In 4 file locations, when coke falls into, chute rotation 3 is enclosed, when ore falls into, chute rotation 3
Circle；In 3 file locations, when coke falls into, chute rotation 2 is enclosed, and when ore falls into, chute rotation 2 is enclosed；In 2 file locations, ore falls into
When, chute rotation 2 is enclosed；In 1 file location, when coke falls into, chute rotation 2 is enclosed.
Ore radial edges described in cloth process control are the 1/7 of burner hearth internal diameter to the distance of furnace wall, control distributor chute
At the uniform velocity revolved using PLC control devices control chute to rotate in the direction of the clock or rotating counterclockwise direction of rotation
Turn.After the completion of cloth, chute stops the rotation, and lifts chute, puts down stock rod, closes stream material regulating valve, and cloth terminates.
The lip temperature and the central temperature are determined using cross temperature instrument, the lip temperature is near the stove
The temperature of wall, the central temperature is the temperature of top margin planar central, and the lip temperature is 170 DEG C, and central temperature is 600
DEG C, furnace top pressure is 185kpa.Bottom adjustment process, controls air supply parameter：Air quantity is 3310Nm3/ min, incoming air area is
0.245m3.It is 1.6% to control oxygen enrichment percentage.
It is final to determine coke load 4.8t/t.The smelting process gas utilization rate be 52%, coal than 147kg/tFe,
Coke ratio is 410kg/tFe, ore deposit consumption 2000kg/tFe.
Embodiment 3
A kind of smelting process of vanadium titano-magnetite includes：It is that the large quantities of ore deposit ores of 8~16mm and particle diameter are 6~8mm by particle diameter
Small quantities of money ore be mixed to get ore, according to burden distribution system J33 3 31 3 29 3 27 2 20 2, K31 2 29 3 27 2 26 2Carry out cloth；Wherein, J is represented
Be coke, what K was represented is ore, and the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears
And 1 gear, digital subscript represents corresponding angle, the number of turns of numeric suffix respective notch, the inclination angle of distributor chute respectively
Degree is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, respectively corresponding angle be 33 °, 31 °, 29 °,
27 °, 26 ° and 20 °, in 6 file locations, when coke falls into, chute rotation 3 is enclosed；In 5 file locations, when coke falls into, chute rotation
3 circles, when ore falls into, chute rotation 2 is enclosed；In 4 file locations, when coke falls into, chute rotation 3 is enclosed, when ore falls into, chute rotation
Turn 3 circles；In 3 file locations, when coke falls into, chute rotation 2 is enclosed, and when ore falls into, chute rotation 2 is enclosed；In 2 file locations, ore
When falling into, chute rotation 2 is enclosed；In 1 file location, when coke falls into, chute rotation 2 is enclosed.
Ore radial edges described in cloth process control are the 1/5 of burner hearth internal diameter to the distance of furnace wall, control distributor chute
At the uniform velocity revolved using PLC control devices control chute to rotate in the direction of the clock or rotating counterclockwise direction of rotation
Turn.After the completion of cloth, chute stops the rotation, and lifts chute, puts down stock rod, closes stream material regulating valve, and cloth terminates.
The lip temperature and the central temperature are determined using cross temperature instrument, the lip temperature is near the stove
The temperature of wall, the central temperature is the temperature of top margin planar central, and the lip temperature is 210 DEG C, and central temperature is 700
DEG C, furnace top pressure is 195kpa.Bottom adjustment process, controls air supply parameter：Air quantity is 3330Nm3/ min, incoming air area is
0.240m3.It is 2.0% to control oxygen enrichment percentage.
It is final to determine coke load 4.82t/t.The smelting process gas utilization rate be 51%, coal than 148kg/tFe,
Coke ratio is 415kg/tFe, ore deposit consumption 2002kg/tFe.
The above is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred embodiment is not construed as
Limitation of the invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of smelting process of vanadium titano-magnetite, it is characterised in that the smelting process burden distribution system is J33 3 31 3 29 3 27 2 20 2,
K31 2 29 3 27 2 26 2；Wherein, what J was represented is coke, and what K was represented is ore, the angle of inclination of distributor chute be divided into 6 gears, 5 grades
Position, 4 gears, 3 gears, 2 gears and 1 gear, digital subscript represent corresponding angle, the circle of numeric suffix respective notch respectively
Number, the angle of inclination of distributor chute is divided into 6 gears, 5 gears, 4 gears, 3 gears, 2 gears and 1 gear, corresponding respectively
Angle is 33 °, 31 °, 29 °, 27 °, 26 ° and 20 °, and in 6 file locations, when coke falls into, chute rotation 3 is enclosed；In 5 file locations,
When coke falls into, chute rotation 3 is enclosed, and when ore falls into, chute rotation 2 is enclosed；In 4 file locations, when coke falls into, chute rotation 3
Circle, when ore falls into, chute rotation 3 is enclosed；In 3 file locations, when coke falls into, chute rotation 2 is enclosed, when ore falls into, chute rotation
Turn 2 circles；In 2 file locations, when ore falls into, chute rotation 2 is enclosed；In 1 file location, when coke falls into, chute rotation 2 is enclosed.
2. smelting process according to claim 1, it is characterised in that the ore is by large quantities of ore deposit ores and small quantities of ore deposit ore
Composition, large quantities of ore deposit ore particle diameters are 8~16mm, and small quantities of money ore particle diameter is 6~8mm.
3. smelting process according to claim 1, it is characterised in that 4.8~4.9t/t of the smelting process coke load.
4. smelting process according to claim 1, it is characterised in that the smelting process also includes the control ore footpath
To the distance at edge to furnace wall 1/9~1/5 cloth is carried out for burner hearth internal diameter.
5. smelting process according to claim 1, it is characterised in that the smelting process also includes control distributor chute rotation
Turn direction to rotate in the direction of the clock or rotating counterclockwise.
6. smelting process according to claim 1, it is characterised in that the smelting process also includes controlling dress using PLC
Control chute is put at the uniform velocity to rotate.
7. smelting process according to claim 1, it is characterised in that the smelting process also includes control cooktop edge temperature
It is 140~210 DEG C to spend, and central temperature is 180~700 DEG C.
8. smelting process according to claim 1, it is characterised in that the smelting process also includes control air supply parameter：
Air quantity is 3310~3340Nm3/ min, incoming air area is 0.235~0.245m3。
9. smelting process according to claim 1, it is characterised in that the smelting process also includes controlling the oxygen enrichment percentage be
1.6~2.0%.
10. smelting process according to claim 1, it is characterised in that the smelting process also includes control furnace top pressure
It is 175~195kpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154913.4A CN106755670B (en) | 2016-12-14 | 2016-12-14 | A kind of smelting process of vanadium titano-magnetite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154913.4A CN106755670B (en) | 2016-12-14 | 2016-12-14 | A kind of smelting process of vanadium titano-magnetite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106755670A true CN106755670A (en) | 2017-05-31 |
| CN106755670B CN106755670B (en) | 2019-01-01 |
Family
ID=58887971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611154913.4A Active CN106755670B (en) | 2016-12-14 | 2016-12-14 | A kind of smelting process of vanadium titano-magnetite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106755670B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287372A (en) * | 2017-06-26 | 2017-10-24 | 山西太钢不锈钢股份有限公司 | A kind of method of blast furnace throat radial coke power load distributing |
| CN110923379A (en) * | 2019-11-05 | 2020-03-27 | 攀钢集团西昌钢钒有限公司 | Blast furnace burden distribution method for smelting vanadium titano-magnetite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014210A (en) * | 2012-12-21 | 2013-04-03 | 江苏永钢集团有限公司 | Top distribution device and distribution method for blast furnace |
| CN103898258A (en) * | 2014-04-09 | 2014-07-02 | 莱芜钢铁集团有限公司 | Method for burden distribution of blast furnace |
| CN103966373A (en) * | 2014-04-29 | 2014-08-06 | 江苏省沙钢钢铁研究院有限公司 | Bell-less material distributing method capable of ensuring stable running of blast furnace |
-
2016
- 2016-12-14 CN CN201611154913.4A patent/CN106755670B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014210A (en) * | 2012-12-21 | 2013-04-03 | 江苏永钢集团有限公司 | Top distribution device and distribution method for blast furnace |
| CN103898258A (en) * | 2014-04-09 | 2014-07-02 | 莱芜钢铁集团有限公司 | Method for burden distribution of blast furnace |
| CN103966373A (en) * | 2014-04-29 | 2014-08-06 | 江苏省沙钢钢铁研究院有限公司 | Bell-less material distributing method capable of ensuring stable running of blast furnace |
Non-Patent Citations (3)
| Title |
|---|
| 何益先 等: "德胜钒钛1250m3高炉低品位高钒钛冶炼降焦比实践", 《四川冶金》 * |
| 张寿荣 等: "《高炉高效冶炼技术》", 30 April 2015 * |
| 朱所成: "酒钢2号高炉装料制度优化实践", 《甘肃冶金》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287372A (en) * | 2017-06-26 | 2017-10-24 | 山西太钢不锈钢股份有限公司 | A kind of method of blast furnace throat radial coke power load distributing |
| CN107287372B (en) * | 2017-06-26 | 2019-03-29 | 山西太钢不锈钢股份有限公司 | A kind of method of blast furnace throat radial coke power load distributing |
| CN110923379A (en) * | 2019-11-05 | 2020-03-27 | 攀钢集团西昌钢钒有限公司 | Blast furnace burden distribution method for smelting vanadium titano-magnetite |
| CN110923379B (en) * | 2019-11-05 | 2022-02-11 | 攀钢集团西昌钢钒有限公司 | Blast furnace burden distribution method for smelting vanadium titano-magnetite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106755670B (en) | 2019-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107119163A (en) | A kind of Burden distribution method of blast furnace of pelletizing at high proportion | |
| CN104133945B (en) | A kind of control method of blast furnace material distribution process radial direction ore coke ratio | |
| CN103334004B (en) | Method for producing sinter from Yuanjia village concentrate powder by using large sintering machine | |
| CN103981308A (en) | New charging method of schreyerite smelting blast furnace | |
| CN101497933B (en) | Method for rapidly and directly reducing haematite or limonite into ferrous powder | |
| CN107058655B (en) | It adapts to different working of a furnace conditions and realizes the Burden distribution method of blast furnace efficiently smelted | |
| CN104099466A (en) | Production method of bilayer structure pellet and production equipment thereof | |
| CN106755670B (en) | A kind of smelting process of vanadium titano-magnetite | |
| CN110205484A (en) | A kind of sinter and preparation method thereof | |
| CN101896627A (en) | Self-fluxing pellets for use in a blast furnce and process for the production of the same | |
| CN103011267B (en) | Low-temperature boiling chloridizing process | |
| CN106011341A (en) | Method for improving coal ratio in schreyerite blast furnace smelting | |
| CN107227411A (en) | A kind of method that rotary kiln oxygen-enriched combusting prepares high-grade secondary zinc oxide | |
| CN108085444A (en) | A kind of burden distribution matrix design method for improving large blast furnace gas utilization rate | |
| JP6167829B2 (en) | Blast furnace operation method | |
| CN104630453B (en) | It is a kind of choose the titanium compound of vanadium containing chromium type in addition of Iron Ore Powder method | |
| JP4971812B2 (en) | Blast furnace operation method | |
| CN106591524A (en) | Low-cost blast furnace smelting method | |
| CN102010922A (en) | Method for distributing raw materials with high zinc content in blast furnace with bell-less top | |
| CN116694837A (en) | Distribution method for high-proportion bituminous coal injection | |
| CN106498152B (en) | A kind of limonite super thick bed of material sintering method using pre-sintering | |
| CN105969986B (en) | A kind of processing method of acid-washing stainless steel sludge | |
| CN107739778A (en) | A kind of steel ladle bottom argon blowing device and its refining stirring means | |
| CN108265143B (en) | A kind of loading method preventing blast-furnace shaft knot thickness | |
| CN104745799B (en) | A kind of method of control rotary kiln redox condition |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |