CN101693933B - Ironmaking technical furnace top charging technology - Google Patents
Ironmaking technical furnace top charging technology Download PDFInfo
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- CN101693933B CN101693933B CN2009101911754A CN200910191175A CN101693933B CN 101693933 B CN101693933 B CN 101693933B CN 2009101911754 A CN2009101911754 A CN 2009101911754A CN 200910191175 A CN200910191175 A CN 200910191175A CN 101693933 B CN101693933 B CN 101693933B
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Abstract
The invention relates to an ironmaking technical furnace top charging technology. The technology includes a direct reduction furnace top charging system, a melting furnace top charging system and a sponge iron delivery system, wherein the direct reduction furnace top charging system and the melting furnace top charging system are arranged in parallel, the top of a direct reduction furnace is provided with a raw material delivery device that delivers ores, fuels and auxiliary materials to the top of a direct reduction furnace (1) and a melting furnace (10); and after passing through at least one distribution device, the ores pass through the direct reduction furnace top charging system and are added in the direct reduction furnace (1), and the fuels and the auxiliary materials pass through the melting furnace top charging system and are then added in the melting furnace (10). The technology lowers the whole height of charging systems and is convenient for construction. Simultaneously, the method combines the technology of producing sponge iron through direct reduction with the technology of producing molten iron through melting into a whole, thus reducing the heat loss of thermal-state sponge iron in delivery process, improving productivity and decreasing energy consumption.
Description
Technical field
The present invention relates to a kind of ironmaking technical furnace top charging technology.
Background technology
The non-blast furnace ironmaking technology is worldwide extensively promoted as a kind of novel environment friendly iron-smelting process flow process.Raw material generates sponge iron by direct reduction furnace, and sponge iron enters the molten stove that divides after by e Foerderanlage, briquetting, generates molten iron.Existing mode is reduction furnace and melts the branch stove for vertically being arranged in order, this mode causes the entire equipment overall height too high, it is inconvenient to construct, and what the sponge iron that simultaneously direct reduction furnace comes out can not be very fast is transported in the molten branch stove, has caused the loss of sponge iron heat.
Summary of the invention
The purpose of this invention is to provide the ironmaking technical furnace top charging technology that a kind of integral device height is low, be convenient to construct.
To achieve these goals, adopt following technical scheme: a kind of ironmaking technical furnace top charging technology, comprise direct reduction furnace top charging system, the molten stove top charging system that divides, the sponge iron delivery system,
Wherein directly reduction furnace top charging system comprises all pressures storehouse, intermediate bunker, the FlexbleJoint that connects successively by pipeline, distributor; The described top in storehouse of all pressing is provided with the top seal valve, and the described bottom in storehouse of all pressing is provided with the material lock, and the top of described intermediate bunker is provided with the lower seal valve, and the bottom of described intermediate bunker is provided with material flow gate;
The wherein molten stove top charging system that divides comprises that the bottom that connects successively by pipeline is provided with the receiver bin of material valve, all presses storehouse, intermediate bunker, the described top in storehouse of all pressing is provided with the top seal valve, the described bottom in storehouse of all pressing is provided with the material lock, the top of described intermediate bunker is provided with the lower seal valve, and the bottom of described intermediate bunker is provided with material flow gate;
It is characterized in that:
Described direct reduction furnace top charging system and described molten minute stove top charging system put side by side, the top of described direct reduction furnace is provided with raw material conveying device, raw material conveying device is transported to direct reduction furnace and the molten furnace roof portion that divides with ore, fuel and auxiliary material, through behind at least one distribution device
Ore adds ore in the direct reduction furnace by direct reduction furnace top charging system;
Fuel and auxiliary material add molten the branch in the stove by the molten stove top charging system that divides with fuel and auxiliary material.
Described sponge iron delivery system comprises sponge iron is delivered to other technical process sponge iron delivery systems of other technical process and sponge iron is delivered to a molten molten minute stove sponge iron delivery system of dividing the stove furnace roof; Described raw material conveying device is an at least one rotary conveyor, and described distribution device is an oscillating chute.
Described other technical process sponge iron delivery systems comprise trip valve, sending warehouse, turning valve, nozzle and the Pneumatic conveying pipeline that is connected to the sponge iron outlet of direct reduction furnace bottom in turn.
Stove sponge iron delivery system can adopt down array structure in described molten minute: described molten minute stove sponge iron delivery system comprises the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all presses storehouse, sending warehouse, turning valve, nozzle and Pneumatic conveying pipeline; The Pneumatic conveying pipeline end is connected with material gas separating device, turning valve in turn, concentrates funnel and distributor; The material gas separating device also is connected with pipeline with the molten top of stove of dividing; Stove top charging system was connected to described concentrated funnel by hot blast valve in described molten minute;
Sponge iron enters turning valve by trip valve, the discharge velocity of control sponge iron, enter again and all press the storehouse, enter sending warehouse after all pressing the back and sending warehouse pressure is consistent, by sending warehouse bottom turning valve, successive enters nozzle, be transferred medium-gas at the nozzle place and be transported to the molten stove furnace roof material gas separating device that divides by transport pipe, delivering gas separates the back and enters molten the branch in the stove by pipeline, and turning valve starts, sponge iron is arranged in molten the branch in the stove uniformly by concentrating funnel and distributor.
Stove sponge iron delivery system also can adopt down array structure in described molten minute: comprise the trip valve, sending warehouse, turning valve, nozzle and the Pneumatic conveying pipeline that are connected to the sponge iron outlet of direct reduction furnace bottom in turn, the end of Pneumatic conveying pipeline be connected with in turn material gas separating device, turning valve, top seal valve, all press storehouse, material flow gate, lower seal valve, concentrate funnel and distributor; Stove top charging system was connected to described concentrated funnel by hot blast valve in described molten minute; Sponge iron enters sending warehouse by trip valve, enter nozzle by turning valve, be transferred medium-gas at the nozzle place by pipeline and be transported to the material gas separating device, all press the storehouse to unload to be depressed into and expect that gas separating device pressure is consistent, open upper sealing valve, sponge iron enters by material gas separating device bottom turning valve and all presses the storehouse, turning valve stops feed then, upper sealing valve is closed, begin inflation and all be depressed into consistently, open the lower seal valve, open material flow gate then with molten minute furnace pressure, sponge iron enters concentrated funnel, enters molten the branch in the stove by distributor.
Stove sponge iron delivery system also can adopt down array structure in described molten minute: comprise the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all press storehouse, sending warehouse, turning valve, nozzle and Pneumatic conveying pipeline; The Pneumatic conveying pipeline end is connected with divider, and described divider is located at molten upper of furnace body of dividing stove, and sponge iron to divider, is sent into molten the branch in the stove with sponge iron from molten the branch by pipe-line transportation the uniform outlet of stove circumferential direction.
Stove top charging system was connected to described molten minute furnace roof portion by distributor in described molten minute;
Be provided with the heat insulation and wear resistance protective layer in the described Pneumatic conveying pipeline, described Pneumatic conveying pipeline is connected with an adapter bonnet at least, and described Pneumatic conveying pipeline is connected with a loop expansion pipe or expansion pipe at least.
Described all the pressure also is connected with equal row pressure system and sack cleaner in turn on the storehouse, when all pressing the storehouse row pressure, gas by equal row pressure system and sack cleaner after, directly the discharging.
The transport of sponge iron temperature is 500 ℃～700 ℃ in the described sponge iron delivery system.
Described distributor is connected with cooling gas by pipeline, and internal pressure is greater than the molten furnace pressure that divides.
Wherein the sponge iron delivery system also can adopt chapelet to carry, described molten minute stove sponge iron delivery system comprises the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all presses storehouse, turning valve, the below of described turning valve is provided with chapelet, the below of the other end of chapelet is provided with the weighing storehouse with bottom material lock, and the below in weighing storehouse is provided with successively to have the top seal valve, all press the storehouse, material flow gate, lower seal valve, concentrate funnel and distributor; Stove top charging system was connected to described concentrated funnel by hot blast valve in described molten minute;
Hot sponge iron enters by turning valve from reduction shaft furnace and all presses the storehouse, enters chapelet through turning valve after all pressing, and rises to the weighing storehouse, after all pressing the storehouse row pressure, open the top seal valve, open bottom, weighing storehouse material lock then, sponge iron enters all presses the storehouse, close the top seal valve, all be depressed into consistently, open the lower seal valve, open material flow gate then with the molten furnace pressure that divides, sponge iron enters concentrated funnel, enters molten the branch in the stove by distributor.
Described other technical process sponge iron delivery systems comprise the trip valve that is connected to the sponge iron outlet of direct reduction furnace bottom in turn, turning valve, all press storehouse, turning valve, the below of described turning valve is provided with chapelet, and sponge iron is delivered to other technical process by chapelet.
Described chapelet is provided with thermofin.
Be connected with rare gas element in the described chapelet.
Beneficial effect of the present invention is: the present invention is arranged side by side with the molten stove that divides with direct reduction furnace, has reduced the height of total system, is convenient to construction.This method will directly be reduced to generate sponge iron technology and melt and be divided production molten iron technology to be coupled as one simultaneously, reduce the thermosteresis of hot sponge iron in course of conveying, improve productivity, reduce energy consumption.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2;
Fig. 3 is the structural representation of embodiment 3;
Fig. 4 is the structural representation of embodiment 4.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment 1: as Fig. 1, raw material, fuel and auxiliary material are transported to direct reduction furnace 1 and molten branch stove 10 furnace roofs, by an oscillating chute 26 in batches by a rotary conveyor 5, raw material is sent into direct reduction furnace 1 top charging system, fuel and auxiliary material are sent into moltenly divided stove 10 top charging systems.
The molten stove top charging system that divides, by horizontal feed belt 37, receiver bin 7, all press storehouse 13, intermediate bunker 15, all row pressure system 16, top seal valve 36, material lock 35, lower seal valve 34, material lock 32, material flow gate 38, FlexbleJoint 51, hot blast valve 24, material gas separating device 14 is concentrated funnel 12, and distributor 11 is formed.Fuel and auxiliary material enter horizontal feed belt 37 by oscillating chute 26, and fuel and auxiliary material are sent into receiver bin 7, after all pressing storehouse 13 row pressures, open top seal valve 36 earlier, open material lock 32 then, fuel and auxiliary material enter all presses in the storehouse 13, close top seal valve 36, charge into nitrogen and all press, pressure with molten divide stove 10 furnace pressures consistent after, open lower seal valve 34 earlier, opening material lock 35 then, raw material enters intermediate bunker 15.When molten branch stove 10 needs to add fuel and auxiliary material, open hot blast valve 24 earlier, open material flow gate 38 then, fuel and auxiliary material pass through to concentrate funnel 12 and distributor 11, are arranged in the stove uniformly.Turning valve 33 is arranged at sponge iron charge gas separating device 14 bottoms, and when needs added sponge iron, turning valve 33 started, and sponge iron is arranged in the stove uniformly by concentrating funnel 12 and distributor 11.The isolated delivering gas of material gas separating device directly enters molten the branch in the stove 10 by pipeline 40.
The output of reduction shaft furnace 1 hot sponge iron, the one tunnel is transported to other technical process 25, and another road is transported to molten branch stove 10 furnace roof material gas separating devices 14.Owing to be transported to other technical process 25 place's pressure less than reduction shaft furnace 1 pressure, therefore, sponge iron enters sending warehouse 39 by trip valve 18, enters nozzle 23 by turning valve 22, is transferred medium-gas at nozzle 23 places and is transported to other technical process 25.Because the molten stove 10 furnace roof material gas separating devices 14 place's pressure that divide are consistent with molten stove 10 internal pressures of dividing, greater than reduction shaft furnace 1 internal pressure, sponge iron enters turning valve 19 by trip valve 18, the discharge velocity of control sponge iron, enter again and all press storehouse 20, enter sending warehouse 21 after all pressing the back and sending warehouse 21 pressure are consistent, by sending warehouse bottom turning valve 22, successive enters nozzle 23, is transferred medium-gas at nozzle 23 places and is transported to molten branch stove 10 furnace roof material gas separating devices 14 by transport pipe 8.A whole set of strength transmitting apparatus is a high-temperature sponge iron owing to what send; its turning valve 22, trip valve 18, all press storehouse 20, sending warehouse 21 enclosure interior that refractory protection is all arranged; seal valve, turning valve motor element all have water-cooling system to guarantee the normal operation of mechanical mechanism at high temperature.
Transfer lime is formed by flange connection by the steel pipe of the inner matcoveredn of multistage.
Bend pipe is the most serious parts of wearing and tearing in the process of pneumatic transmission; usually employing forms the bank lamination naturally at the turning; when sponge iron particle is transported to the turning; particle hits on the accumulation horizon rather than on the transfer lime protective layer; the effective like this wearing and tearing that reduce bend pipe have prolonged work-ing life.
Because pipeline is subjected to the influence of high-temperature sponge iron, causes distortion, therefore on a segment distance, arrange loop expansion pipe and expansion pipe, be out of shape the distortion that causes with extraction duct.
In the process of pneumatic transmission, increase along with fed distance, it is big that crushing becomes gradually, pressure reduces gradually, and gas velocity strengthens gradually, in order to guarantee that delivering gas speed is in a suitable scope, to guarantee transport capacity and to reduce pipe wear, one place's adapter bonnet 9 is set at a certain distance, reduces gas, make it all the time all in a suitable scope in ducted speed.
After sponge iron was delivered to material gas separating device 14, the delivering gas that is separated directly entered molten the branch in the stove 10 by pipeline.Adopt air conveying mode can improve the speed that sponge iron is carried, reduce scattering and disappearing of heat, improved productivity, reduced energy consumption, and environmental protection in the course of conveying, can not produce airborne dust, waste gas can not spread yet.
All in the row pressure system, the body of all calming the anger is a nitrogen.Nitrogen directly enters atmosphere by furnace roof sack cleaner 6 during row pressure.The dust that the device of giving a dinner of welcome on rotary conveyor absorbs collects discharging by this sack cleaner equally.
Embodiment 2: as Fig. 2, the charging of this embodiment raw material, fuel and auxiliary material is consistent with embodiment 1 scheme, and its difference is the conveying of hot sponge iron.
The output of reduction shaft furnace 1 hot sponge iron, the one tunnel is transported to other technical process 25, and another road is transported to molten branch stove 10 furnace roof material gas separating devices 14.Other technical process 25 and the molten pressure at stove 10 furnace roof material gas separating devices 14 places that divides are all less than the pressure in the reduction shaft furnace 1, therefore, sponge iron enters sending warehouse 39 by trip valve 18, enter nozzle 23 by turning valve 22, be transferred medium-gas at nozzle 23 places by pipeline 8 and be transported to other technical process 25 and molten branch stove 10 furnace roof material gas separating devices 14.
The molten stove 10 furnace roof material gas separating devices 14 interior pressure that divide divide stove 10 internal pressures less than molten, could add after all pressing hot sponge iron.When filling with substance, all press storehouse 42 to unload to be depressed into and expect that gas separating device 14 pressure are consistent, open upper sealing valve 41, sponge iron enters by material gas separating device 14 bottom turning valves 33 and all presses storehouse 42, turning valve 33 stops feed then, upper sealing valve 41 is closed, and begins to charge into nitrogen and all is depressed into consistent with molten stove 10 internal pressures of dividing.Open lower seal valve 44, open material flow gate 43 then, sponge iron enters concentrates funnel 12, enters molten the branch in the stove 10 by distributor 11.
After delivering gas comes out from the material gas separating device, by recycling after dedusting, cooling, the pressurization.
Embodiment 3: as Fig. 3, the charging of this embodiment raw material, fuel and auxiliary material is consistent with scheme shown in the embodiment 1, and its difference is the conveying of hot sponge iron.
This scheme has been saved molten minute stove furnace roof material gas separating device 14, changes into sponge iron is directly sent into molten the branch in the stove 10.After hot sponge iron is discharged from reduction shaft furnace 1, its send mode is sent to molten branch stove furnace roof material gas separating device 14 unanimities with scheme shown in Figure 1 with sponge iron, after sponge iron is delivered to divider 45 by pipeline 8, divide several roads pipeline that sponge iron is sent into molten the branch in the stove from molten the branch the uniform outlet of stove 10 circumferential directions.
Embodiment 4: as Fig. 4, the charging of this embodiment raw material, fuel and auxiliary material and the difference of embodiment 1 are the conveying of hot sponge iron.
The hot sponge iron of this scheme is carried and is adopted chapelet.Hot sponge iron enters by turning valve 49 from reduction shaft furnace 1 and all presses storehouse 48, enter chapelet 46 after all pressing, in the chapelet 46 thermofin is arranged, and feeding nitrogen prevents the oxidation of sponge iron, be transported to the molten stove furnace roof weighing storehouse 47 of dividing, after all pressing storehouse 42 row pressures, open top seal valve 41, open bottom, weighing storehouse material lock 50 then, sponge iron enters and all presses storehouse 42, close top seal valve 41, all be depressed into consistently, open lower seal valve 44, open material flow gate 43 then with the molten furnace pressure that divides, sponge iron enters concentrates funnel 12, enters molten the branch in the stove 10 by distributor 11.
Other technical process sponge iron delivery systems comprise the trip valve 18 that is connected to the 1 bottom sponge iron outlet of direct reduction furnace in turn, turning valve 49, all press storehouse 48, turning valve 22, the below of described turning valve 22 is provided with chapelet 46 ', and sponge iron is delivered to other technical process 25 by chapelet 46 '.
Certainly some equipment among the present invention are done conventional replacement, replace with screw feeder as turning valve, material valve similarly changes, and all drops within protection scope of the present invention.
Claims (6)
1. iron-smelting process top charging device comprises direct reduction furnace top charging system, a molten stove top charging system, the sponge iron delivery system of dividing;
Wherein directly reduction furnace top charging system comprises by what pipeline connected successively and first all presses storehouse (4), first intermediate bunker (3), first FlexbleJoint (31), first distributor (2); Described first all presses the top in storehouse (4) to be provided with the first top seal valve (27), described first all presses the bottom in storehouse (4) to be provided with the first material lock (28), the top of described first intermediate bunker (3) is provided with the first lower seal valve (29), and the bottom of described first intermediate bunker (3) is provided with first material flow gate (30);
The wherein molten receiver bin (7), second that divides stove top charging system to comprise that the bottom that connects successively by pipeline is provided with the second material lock (32) is all pressed storehouse (13), second intermediate bunker (15), described second all presses the top in storehouse (13) to be provided with the second top seal valve (36), described second all presses the bottom in storehouse (13) to be provided with the 3rd material lock (35), the top of described second intermediate bunker (15) is provided with the second lower seal valve (34), and the bottom of described second intermediate bunker (15) is provided with second material flow gate (38);
It is characterized in that:
Described direct reduction furnace top charging system and described molten minute stove top charging system put side by side, the top of described direct reduction furnace is provided with raw material conveying device, raw material conveying device is transported to direct reduction furnace (1) and molten stove (10) top of dividing with ore, fuel and auxiliary material, through behind at least one distribution device
Ore adds ore in the direct reduction furnace (1) by direct reduction furnace top charging system;
Fuel and auxiliary material add molten the branch in the stove (10) by the molten stove top charging system that divides with fuel and auxiliary material;
Described sponge iron delivery system comprises sponge iron is delivered to other technical process sponge iron delivery systems of other technical process (25) and sponge iron is delivered to a molten molten minute stove sponge iron delivery system of dividing stove (10) furnace roof; Described raw material conveying device is at least one rotary conveyor (5), and described distribution device is oscillating chute (26);
Described other technical process sponge iron delivery systems comprise trip valve (18), second sending warehouse (39), second turning valve (22), nozzle (23) and second Pneumatic conveying pipeline (8 ') that is connected to the sponge iron outlet of direct reduction furnace (1) bottom in turn;
Described molten minute stove sponge iron delivery system comprises that the trip valve (18), first turning valve (19), the 3rd that are connected to the sponge iron outlet of direct reduction furnace (1) bottom in turn all press storehouse (20), first sending warehouse (21), second turning valve (22), nozzle (23) and first Pneumatic conveying pipeline (8); First Pneumatic conveying pipeline (8) end is connected with material gas separating device (14), the 3rd turning valve (33) in turn, concentrates funnel (12) and second distributor (11); Material gas separating device (14) also is connected with pipeline (40) with the molten top of stove (10) of dividing;
Stove top charging system was connected to described concentrated funnel (12) by hot blast valve (24) in described molten minute;
Sponge iron enters first turning valve (19) by trip valve (18), the discharge velocity of control sponge iron, enter the 3rd again and all press storehouse (20), enter first sending warehouse (21) after all pressing the back and first sending warehouse (21) pressure is consistent, by first sending warehouse (21) bottom, second turning valve (22), successive enters nozzle (23), locate to be transferred medium-gas at nozzle (23) and be transported to molten stove (10) the furnace roof material gas separating device (14) that divides by first Pneumatic conveying pipeline (8), delivering gas separates the back and enters molten the branch in the stove (10) by pipeline (40), the 3rd turning valve (33) starts, sponge iron is arranged in molten the branch in the stove (10) uniformly by concentrating funnel (12) and second distributor (11).
2. iron-smelting process top charging device as claimed in claim 1 is characterized in that: be provided with the heat insulation and wear resistance protective layer in described first Pneumatic conveying pipeline (8).
3. iron-smelting process top charging device as claimed in claim 2 is characterized in that: described first Pneumatic conveying pipeline (8) is connected with an adapter bonnet (9) at least.
4. iron-smelting process top charging device as claimed in claim 3 is characterized in that: described first Pneumatic conveying pipeline (8) is connected with a loop expansion pipe or expansion pipe at least.
5. iron-smelting process top charging device as claimed in claim 4, it is characterized in that: described second all presses and also is connected with the first equal row pressure system (16) and sack cleaner (6) on the storehouse (13) in turn, second when all pressing storehouse (13) row pressure, after gas passes through the first equal row pressure system (16) and sack cleaner (6), directly discharging.
6. iron-smelting process top charging device as claimed in claim 5 is characterized in that: the transport of sponge iron temperature is 500 ℃～700 ℃ in the described sponge iron delivery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101911754A CN101693933B (en) | 2009-10-22 | 2009-10-22 | Ironmaking technical furnace top charging technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101911754A CN101693933B (en) | 2009-10-22 | 2009-10-22 | Ironmaking technical furnace top charging technology |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102864467A Division CN101935729B (en) | 2009-10-22 | 2009-10-22 | Top loading process for iron-smelting process furnace |
| CN2010102864486A Division CN101935731B (en) | 2009-10-22 | 2009-10-22 | Top charging process for iron-making process furnace |
| CN2010102864471A Division CN101935730B (en) | 2009-10-22 | 2009-10-22 | Furnace top charging process in iron-making process |
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| Publication Number | Publication Date |
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| CN101693933A CN101693933A (en) | 2010-04-14 |
| CN101693933B true CN101693933B (en) | 2011-03-16 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101928798B (en) * | 2010-09-06 | 2012-05-09 | 攀钢集团有限公司 | Discharge mechanism applied to reduction roasting device and discharging method thereof |
| CN102003881A (en) * | 2010-11-26 | 2011-04-06 | 中冶赛迪工程技术股份有限公司 | Loading and unloading method and system of iron making process with direct reduction furnace and melting furnace |
| CN102925614A (en) * | 2012-11-22 | 2013-02-13 | 中冶赛迪工程技术股份有限公司 | Material discharge device for vertical furnace |
| CN102912059A (en) * | 2012-11-22 | 2013-02-06 | 中冶赛迪工程技术股份有限公司 | Top charging device of shaft furnace |
| CN103602342B (en) * | 2013-11-14 | 2016-05-11 | 中冶东方工程技术有限公司 | Charging apparatus and loading method in Coal Chemical Industry shaft furnace system |
| KR101621057B1 (en) * | 2014-12-22 | 2016-05-13 | 주식회사 포스코 | Method for manufacturing molten irons improving charging method and apparatus for manufacturing molten irons using the same |
| KR101797133B1 (en) * | 2016-08-05 | 2017-11-13 | 주식회사 포스코 | Apparatus for manufacturing molten irons and method for manufacturing molten irons |
| CN106493340B (en) * | 2016-11-29 | 2018-10-26 | 太原科技大学 | A kind of roll-casting of magnesium alloy turns liquid system and device |
| SE2150068A1 (en) * | 2021-01-22 | 2022-07-23 | Hybrit Dev Ab | Arrangement and process for charging iron ore to, and/or discharging sponge iron from, a direct reduction shaft |
| SE2250864A1 (en) * | 2022-07-07 | 2023-02-22 | Hybrit Dev Ab | Arrangement and process for charging iron ore to, and/or discharging sponge iron from, a direct reduction shaft |
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