CN113186367B - Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud - Google Patents
Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud Download PDFInfo
- Publication number
- CN113186367B CN113186367B CN202110466456.7A CN202110466456A CN113186367B CN 113186367 B CN113186367 B CN 113186367B CN 202110466456 A CN202110466456 A CN 202110466456A CN 113186367 B CN113186367 B CN 113186367B
- Authority
- CN
- China
- Prior art keywords
- furnace
- slag
- reduction
- stirring
- spray gun
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/004—Making spongy iron or liquid steel, by direct processes in a continuous way by reduction from ores
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the field of comprehensive utilization of red mud, in particular to a bottom-top composite injection smelting reduction furnace for treating high-iron red mud, which comprises a horizontal furnace body, a vortex charging hole, a bottom-top injection system, an overflow slag hole, a siphon tapping hole and a flue gas outlet; the vortex feed inlet corresponds to a molten pool vortex area; the bottom-top composite injection system comprises a bottom spray gun and a top spray gun, wherein the bottom spray gun injects a gas reducing agent such as natural gas or coal gas and the like to strengthen the multiphase reaction process; the top spray gun injects oxygen-enriched air and fuel to burn and supplement heat, and simultaneously burns CO released in the reduction process, so as to keep the heat balance of the system; the siphon tapping hole and the overflow slag outlet are arranged at the other end of the furnace body, so that continuous tapping and continuous slag discharging are realized; the flue gas outlet is arranged at the upper part of the same end of the tap hole and the slag discharge hole and is connected with a flue gas boiler to recycle flue gas. The smelting reduction furnace can improve the smelting reduction efficiency, fully utilize the system energy and realize the continuous production of extracting iron from the red mud.
Description
Technical Field
The invention relates to the field of comprehensive utilization of red mud, in particular to a bottom-top composite injection smelting reduction furnace for treating high-iron red mud.
Technical Field
China is a big alumina country, the alumina yield per year in China reaches more than 7000 million tons, and the red mud discharged is more than 1 million tons. With the exhaustion of aluminum resources in China, china needs to import a large amount of high-iron gibbsite ore to produce alumina every year, the use proportion of the alumina is higher than 50%, the discharge amount of the high-iron red mud is more than 6000 million tons, and the content of the iron oxide is more than 30-50%.
For a device for comprehensively utilizing red mud in a high-iron Bayer process, a large amount of research work is carried out by related domestic researchers, for example, the device is a superfine-grinding high-iron red mud fine reduction device disclosed by Li shiqi et al, and the application number is as follows: 201120131689.3", the device is characterized by comprising an air source system and a reduction system. Wherein the gas source system comprises N 2 Gas cylinder, H 2 Gas cylinder, CO 2 Gas cylinder, N 2 Gas flowmeter, H 2 The gas mixing device comprises a gas flowmeter, a CO gas flowmeter, a gas reforming device and a gas mixing chamber; the reduction system comprises a resistance furnace, a control cabinet and a crucible.
For example, the application number of "a red mud high-efficiency resource utilization system and process disclosed in Li Fang Zheng et al: CN 201910564184.7', the system is sequentially provided with a water washing tank, a first filter press, a dryer, a first crusher, a screening machine, a stirrer, a forming machine, an electric induction furnace, a second crusher, a magnetic separator, a reaction kettle, a second filter press, a sedimentation tank and a roasting furnace according to the working procedures; the system can convert the raw materials such as red mud, coal powder, waste aluminum scraps and the like into saleable products such as reduced iron, cement raw materials, alumina and the like.
Although the red mud can be reduced, the equipment is complex, the reduction time is long, and the heat utilization rate is low.
Disclosure of Invention
The invention discloses a bottom-top composite injection smelting reduction furnace for treating high-iron red mud, which aims to realize comprehensive utilization of multiple components in the high-iron red mud.
The invention discloses a bottom-top composite injection smelting reduction furnace for treating high-speed rail red mud, which comprises a horizontal furnace body, a vortex charging hole, a bottom-top injection system, an overflow slag hole, a siphon tapping hole and a flue gas outlet, wherein the top of the horizontal furnace body is provided with a top-bottom injection system; the vortex feed inlet is positioned at the upper part of one end (called front end) of the horizontal furnace body, corresponds to a molten pool vortex region and is used for adding solid mixed materials; the bottom-top composite injection system comprises a bottom spray gun, a top spray gun and an auxiliary gas pipeline; the siphon tapping hole and the overflow slag hole are arranged at the other end (called as the rear end) of the furnace body, the overflow slag hole is arranged above the siphon tapping hole, the lower layer molten iron is discharged from the siphon tapping hole after the high-iron red mud is reduced, and the upper layer smelting slag is discharged from the overflow slag hole, so that continuous tapping and continuous slag discharging can be realized; the flue gas outlet is arranged at the upper part of one end of the siphon tapping hole and the overflow slag outlet and is connected with a flue gas boiler to recover the heat of the flue gas.
Preferably, the smelting reduction furnace further comprises a mechanical stirring system, the mechanical stirring system comprises a stirring paddle, a stirring shaft, a high-temperature-resistant connecting fitting and a stirring motor, the upper end and the lower end of the stirring shaft are respectively connected with the stirring motor and the stirring paddle, the inserting height and the inserting position of the stirring paddle can be adjusted according to fluctuation of the position of a slag-metal interface in a molten pool, and the stirring paddle of the mechanical stirring system is preferably positioned at the slag-metal interface in the molten pool when smelting reduction is carried out. The stirring motor drives the stirring paddle to rotate, a stable vortex region is generated in the molten pool, and the stirring rotating speed is controlled to be between 50 and 300rpm and is continuously adjustable.
The blowing system comprises a top spray gun, a bottom spray gun and an auxiliary gas pipeline. The top spray gun is positioned at the top end of the smelting reduction furnace body and is used for blowing oxygen-enriched air and fuel, fully burning CO gas generated by smelting reduction, and realizing heat compensation and stable heat balance on a molten pool. The bottom spray gun is positioned at the bottom of the smelting reduction furnace body and is used for blowing reducing agents such as coal dust, coke, cathode carbon blocks, coal gas or natural gas carried by oxygen-enriched carrier gas to strengthen the multiphase smelting reduction reaction.
Preferably, the bottom lances are equidistantly distributed along a horizontal line of the smelting reduction furnace on both sides of the furnace body, and the reducing agent carried by the oxygen-rich carrier gas can be alternately injected on both sides or injected in a combined manner.
The process for treating the high-iron red mud by adopting the smelting reduction furnace comprises the following steps: firstly, uniformly mixing a reducing agent I (a solid reducing agent such as coke, a cathode carbon block, coal powder and the like), a slagging agent and high-iron red mud to obtain a mixed material, and then continuously adding the mixed material into a smelting reduction furnace through a vortex feeding port; meanwhile, a reducing agent II (which can be a gas reducing agent such as natural gas, coal gas and the like, and can also be coking coal, coke, cathode carbon blocks, coal powder and the like which are the same as the reducing agent I) is carried by oxygen-enriched carrier gas and is sprayed into a molten pool of the smelting reduction furnace through a bottom spray gun, an oxygen-enriched air and fuel (such as coal gas, natural gas and the like) are sprayed through a top spray gun, the fuel is combusted, and CO generated by smelting reduction can be combusted to supplement heat to the molten pool to maintain thermal balance; and carrying out vortex melting reduction under the high-efficiency stirring action of the stirring paddle to obtain molten iron and reducing slag, continuously discharging high-temperature molten iron through a siphon tapping hole, and continuously discharging molten reducing slag through an overflow tapping hole.
Compared with the traditional reduction furnace, the invention has the following advantages and innovations:
1. the continuous operation of the melting reduction process is realized by adopting vortex feeding, siphon tapping and overflow deslagging, and the labor intensity is greatly reduced.
2. The vortex feeding and the mechanical and bottom blowing gas coupling vortex stirring greatly enhance the melting reduction efficiency, reduce the energy consumption and improve the reduction rate of iron.
3. The top-blown oxygen-enriched air and fuel are adopted, and CO generated by melting reduction is fully combusted, so that heat supplement to a molten pool is realized, the heat balance of the system is stabilized, and the energy of the system is fully utilized.
4. The reduction furnace can continuously feed, continuously discharge iron and slag, and realize continuous production of red mud iron extraction.
Drawings
Fig. 1 is a bottom-top combined injection smelting reduction furnace for treating high-iron red mud in the embodiment of the invention.
Description of the drawings: 1-vortex feed inlet, 2-vortex zone, 3,4,5,6, 7-top-blowing spray gun, 8-flue gas outlet, 9-overflow slag outlet, 10-siphon tapping hole, 11,12,13,14, 15-bottom-blowing spray gun.
Detailed Description
The red mud adopted by the embodiment of the invention comprises the following main components: fe 2 O 3 -41.63％，Al 2 O 3 -17.25％，SiO 2 -10.20％，TiO 2 -8.50％，Na 2 O-6.50％，CaO-1.61％。
The reducing agent coking coal adopted by the embodiment of the invention comprises the following main components: 69.17% of fixed carbon, 11.13% of ash and 19.42% of volatile components.
The reducing agent coke adopted by the embodiment of the invention comprises the following main components: 84.5 percent of fixed carbon, 12.1 percent of ash and 2.3 percent of volatile matter.
The reducing agent cathode carbon block adopted by the embodiment of the invention comprises the following main components: 52.1% of fixed carbon, 37.2% of ash and 9.1% of volatile components.
The lime adopted by the embodiment of the invention contains 80 percent of effective CaO and the balance of SiO 2 And the like.
CaF in fluorite adopted by the embodiment of the invention 2 The content is 86 percent, and the rest is Al 2 O 3 、SiO 2 And so on.
The production content of the invention is not limited to the adoption of the raw materials, for example, the reducing agent can be the coke, the coke and the cathode carbon block, and can also be replaced by coal powder and the like, and the consumption of fluorite is reduced; the lime can also be replaced by calcium carbonate or calcium carbide smelting waste residue.
The bottom-top composite injection smelting reduction furnace for treating the high-iron red mud, which is adopted by the embodiment of the invention, is shown in figure 1 and comprises a horizontal furnace body, a vortex feed inlet 1, a bottom-top injection system, an overflow slag outlet 9, a siphon iron outlet 10 and a flue gas outlet 8; the vortex charging hole 1 is positioned at the upper part of the front end of the furnace body; the bottom-top composite injection system comprises top spray guns 3-7 at the top end of the furnace body, bottom spray guns 11-15 at the bottom end of the furnace body and an auxiliary gas pipeline; the siphon tapping hole 10 and the overflow slag hole 9 are arranged at the rear end of the furnace body, and the overflow slag hole is arranged above the siphon tapping hole, so that continuous tapping and continuous slag discharge can be realized; the flue gas outlet 8 is arranged at the upper part of the rear end and is connected with the flue gas boiler to recover the heat of the flue gas.
The corresponding position below the vortex feed inlet 1 is a vortex region 2, and a mechanical stirring system and bottom blowing gas which are not shown in the figure are coupled and stirred to form the vortex region in the molten pool.
The invention is described in detail below with reference to fig. 1 and examples.
(1) Firstly, the high-iron red mud is uniformly mixed with a reducing agent, lime and fluorite, and then the mixture is continuously added into a reduction smelting furnace through a vortex charging hole 1.
(2) And inserting a stirring paddle into the interface of the slag and the metal in the molten pool, starting stirring, and stirring the melt by the stirring paddle to form a vortex with a stable structure and a melt with a stable height.
(3) Oxygen-enriched air and fuel (coal gas or natural gas) are injected into a reduction molten pool by adopting a top spray gun 3-7, the combustion triggers the reduction reaction of the reduction materials to provide heat for the molten pool, the temperature of the melt is ensured to be more than or equal to 1350 ℃, and the oxygen-enriched air blown into the top in the melting reduction process ensures that CO released in the reduction process is fully combusted so as to ensure the heat balance in the furnace. The bottom spray guns 11-15 carry and blow the reducing agent into the molten bath by using oxygen-enriched carrier gas to strengthen the reduction reaction.
(4) Low-sulfur low-phosphorus pig iron and molten reducing slag are obtained after bottom-top composite blowing smelting reduction, a formed bottom molten iron layer is discharged from a siphon iron outlet 10 and then is discharged into a connected molten iron buffer tank bag under the siphon action through a high-temperature resistant closed pipeline at the lower part of a reducing furnace, the molten reducing slag is discharged from an overflow slag outlet 9, and the molten reducing slag can be used for preparing rock wool products through the working procedures of tempering, centrifuging and the like.
(5) And after the furnace is started, the tail gas waste heat collecting and purifying system is started to reduce, and the smelting tail gas is discharged from the flue gas outlet 8, subjected to waste heat recovery and purification treatment and then discharged into the atmosphere.
Example 1
The reducing agent is coke, and the molar ratio of carbon in the reducing agent to iron oxide in the high-iron red mud is 1.5; the ratio of the calcium oxide in the added lime to the sum of the mass of the silicon oxide and the mass of the aluminum oxide in the high-iron red mud is 1.5; the addition amount of fluorite is 8% of the addition amount of calcium oxide. The temperature of the reduction process is 1650 ℃, and the reduction time is 20min. After reduction, the reduction rate of iron is 96.5%, and about 70% of sodium oxide in the red mud is enriched in the flue gas and recovered.
Example 2
The reducing agent is a waste cathode carbon block, and the molar ratio of carbon in the reducing agent to ferric oxide in the high-iron red mud is 6.5; the ratio of the calcium oxide in the added lime to the sum of the mass of the silicon oxide and the mass of the aluminum oxide in the high-iron red mud is 0.8; the amount of fluorite added is 15% of the amount of calcium oxide added. The temperature of the reduction process is 1350 ℃, and the reduction time is 120min. After reduction, the reduction rate of iron is 95.0%, and about 30% of sodium oxide in the red mud is enriched in the flue gas and recovered.
Claims (1)
1. A use method of a bottom-top composite injection smelting reduction furnace for treating high-iron red mud is characterized by comprising the following steps: the smelting reduction furnace comprises a horizontal furnace body, a vortex charging hole, a bottom-top blowing system, an overflow slag hole, a siphon tapping hole and a flue gas outlet; the vortex feeding port is positioned at the upper part of one end of the furnace body; the bottom-top composite injection system comprises a bottom spray gun, a top spray gun and an auxiliary gas pipeline; the siphon tapping hole and the overflow slag outlet are arranged at the other end of the furnace body, so that continuous tapping and continuous slag discharge can be realized; the flue gas outlet is arranged at the upper part of one end of the siphon tapping hole and the overflow slag outlet and is connected with a flue gas boiler to recover the heat of the flue gas; the smelting reduction furnace also comprises a mechanical stirring system, wherein the mechanical stirring system comprises a stirring paddle, a stirring shaft, a high-temperature-resistant connecting accessory and a stirring motor, the upper end and the lower end of the stirring shaft are respectively connected with the stirring motor and the stirring paddle, the inserting height and the position of the stirring paddle can be adjusted, the stirring paddle of the mechanical stirring system is positioned at a slag-metal interface in a molten pool when smelting reduction is carried out, and the stirring speed is continuously adjustable within 50rpm to 300rpm; the top spray gun can spray oxygen-enriched air and fuel in the melting reduction process, and the bottom spray gun can spray reducing agent carried by the oxygen-enriched carrier gas in the melting reduction process; the bottom spray guns are distributed on two sides of the furnace body at equal intervals along the horizontal line of the smelting reduction furnace, and reducing agents carried by the oxygen-enriched carrier gas can be alternately sprayed on the two sides or sprayed in a combined mode;
the using method comprises the following steps:
(1) Firstly, uniformly mixing the high-iron red mud with a reducing agent, lime and fluorite, and then continuously adding the mixture into a reduction smelting furnace through a vortex charging hole;
(2) Inserting a stirring paddle into a slag-metal interface in a molten pool, starting stirring, and stirring the melt by the stirring paddle to form a vortex with a stable structure and a melt with a stable height;
(3) Oxygen-enriched air and fuel are injected into a reduction molten pool by a top spray gun, the reduction reaction of the reduction material is initiated by combustion, heat is provided for the molten pool, the temperature of the melt is ensured to be more than or equal to 1350 ℃, and the oxygen-enriched air injected into the top in the melting reduction process ensures that CO released in the reduction process is fully combusted so as to ensure the heat balance in the furnace; the bottom spray gun carries the reducing agent into the molten pool by using oxygen-enriched carrier gas to strengthen the reduction reaction;
(4) Low-sulfur low-phosphorus pig iron and molten reducing slag are obtained after bottom-top composite blowing smelting reduction, a formed bottom molten iron layer is discharged from a siphon iron outlet and then is discharged into a connected molten iron buffer tank bag under the siphon action through a high-temperature resistant closed pipeline at the lower part of a reducing furnace, and the molten reducing slag is discharged from an overflow slag outlet and is used for preparing rock wool products through the processes of tempering and centrifuging;
(5) And after the furnace is started, the tail gas waste heat collecting and purifying system is started to reduce, and the smelting tail gas is discharged from the flue gas outlet, subjected to waste heat recovery and purification treatment and then discharged into the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110466456.7A CN113186367B (en) | 2021-04-28 | 2021-04-28 | Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110466456.7A CN113186367B (en) | 2021-04-28 | 2021-04-28 | Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113186367A CN113186367A (en) | 2021-07-30 |
| CN113186367B true CN113186367B (en) | 2022-10-04 |
Family
ID=76979884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110466456.7A Active CN113186367B (en) | 2021-04-28 | 2021-04-28 | Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113186367B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116182558A (en) * | 2023-02-24 | 2023-05-30 | 浙江华友钴业股份有限公司 | Oxygen-enriched molten pool melting furnace and heat consumption type material smelting method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8021460B2 (en) * | 2006-07-26 | 2011-09-20 | Nu-Iron Technology, Llc | System and method for producing metallic iron nodules |
| CN201080490Y (en) * | 2007-01-04 | 2008-07-02 | 河南豫光金铅股份有限公司 | Bottom blowing molten pool reducing furnace for liquid high lead dross reduction |
| CN101871725B (en) * | 2010-07-07 | 2012-07-04 | 中南大学 | Horizontal bottom blowing type molten pool desulphurizing furnace and oxidative desulphurization method for leaded materials |
| CN202177296U (en) * | 2011-07-25 | 2012-03-28 | 长沙有色冶金设计研究院有限公司 | Horizontal type oxygen-enriched bottom-blowing molten pool melting furnace |
| CN105063363B (en) * | 2015-08-31 | 2017-09-15 | 云南驰宏锌锗股份有限公司 | The method and apparatus that a kind of earth of positive pole prepares thick silver alloy |
| CN106086275B (en) * | 2016-08-05 | 2018-01-02 | 江苏省冶金设计院有限公司 | A kind of combustion gas with blowing device is molten to divide stove and carries out the method for metallurgy with it |
| CN106367605B (en) * | 2016-08-31 | 2018-06-29 | 河南豫光金铅股份有限公司 | A kind of production method of side-blown dilution copper smelting slag |
| CN106435080B (en) * | 2016-09-27 | 2019-01-08 | 东北大学 | A kind of vortex stirring method for melting reduction iron making |
| CN107227409B (en) * | 2017-07-31 | 2023-11-17 | 河南豫光金铅股份有限公司 | Bottom side blowing molten pool reduction furnace for liquid high-lead slag |
| CN108676942A (en) * | 2018-05-18 | 2018-10-19 | 廖辉明 | The materials such as a kind of iron content and/or zinc lead bronze tin cooperate with processing recovery method with molten steel slag |
| CN111235388B (en) * | 2020-02-12 | 2021-10-26 | 长沙有色冶金设计研究院有限公司 | Side-top-blown molten pool tin smelting process and smelting furnace |
-
2021
- 2021-04-28 CN CN202110466456.7A patent/CN113186367B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113186367A (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102134202B1 (en) | Vortex Stirring Method | |
| CN102618729B (en) | Smelting method and device for molten oxidized lead slag | |
| CN101705360B (en) | Copper-smelting thermal slag iron-extracting process and device | |
| CN105969981B (en) | A kind of technique of vanadium titano-magnetite comprehensive utilization | |
| CN103451344B (en) | CEO compound smelting reduction ironmaking plant and technology | |
| CN105838838B (en) | Method for preparing pure steel by coal gas direct reduction one-step method | |
| CN102433450A (en) | Oxygen-enriched side-blown reduction molten pool smelting furnace and method for smelting tin by using tin-enriched complex material in smelting furnace | |
| CN102583477A (en) | Comprehensive utilization method of high-ferrum and low-grade bauxite | |
| CN113174456B (en) | Comprehensive utilization method for smelting reduction of high-iron red mud by bottom-top combined blowing | |
| CN105238938A (en) | Three continuous furnace technology for continuous production of anode copper with copper concentrate | |
| CN114672643B (en) | Method for synergistically utilizing high-iron red mud and molten steel slag | |
| CN115615188B (en) | Oxygen-enriched double-chamber molten pool smelting side-blown furnace and method for extracting iron and quenching molten steel slag | |
| CN105002371A (en) | Process for producing anode copper by adoption of four connected furnaces | |
| CN113088607A (en) | Method for smelting and recovering iron, vanadium and sodium from red mud | |
| CN113186367B (en) | Use method of bottom-top composite injection smelting reduction furnace for treating high-iron red mud | |
| CN101121950A (en) | Tube furnace-shaft furnace twin coal-base fusing reduction iron-smelting method | |
| WO2022227179A1 (en) | Molten copper slag depletion and side-top combined blowing reduction integrated method | |
| WO2022227180A1 (en) | Copper smelting-thermal state vortex depletion integrated method | |
| CN105506299A (en) | Low-grade secondary lead smelting slag fuming furnace treatment system and method | |
| CN108558244B (en) | Device and method for preparing cement mixture by utilizing thermal state converter slag | |
| CN111394588A (en) | Method and device for directly producing iron-vanadium-chromium alloy by treating vanadium extraction tailings | |
| CN208266070U (en) | A kind of device preparing cement admixture using hot vessel slag | |
| CN106222349B (en) | A kind of method and device handling iron-bearing material using bath smelting furnace | |
| CN113174457B (en) | Use method of side-top composite injection smelting reduction furnace for treating high-iron red mud | |
| CN114657303B (en) | Method for synergistically utilizing high-iron red mud and scrap steel |
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 |