CN103525963A - Aerobic smelting submerged arc furnace and aerobic smelting method thereof - Google Patents
Aerobic smelting submerged arc furnace and aerobic smelting method thereof Download PDFInfo
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Abstract
The invention discloses an aerobic smelting submerged arc furnace and an aerobic smelting method thereof. The furnace comprises a furnace body (1), a feeding system (2), an electrode device (3), a discharge hole, a flue gas dust removing and gas recovery system (5) and an oxygen distributing system (4) which comprises an oxygen distributor (41) located at the middle-lower part of the furnace body (1). The method comprises the following steps of adding a mixed material containing a pre-reduced ore and a carbonaceous reducing agent into the submerged arc furnace, electrifying the electrode device (3) to emit heat, introducing oxygen at the middle-lower part of the furnace body (1) once molten iron appears in the submerged arc furnace or once the temperature of the material at the preset position in the furnace exceeds a temperature threshold value, and opening the discharge hole to discharge the molten iron and slags when the molten iron is accumulated to a preset quantity. According to the invention, the oxygen is introduced into the submerged arc furnace and the metallic iron in the pre-reduced ore is heated and melted through the heat emitted by a combination reaction of the carbonaceous reducing agent and the oxygen, so that the electric energy is saved, the reaction speed is increased and the supplement reduction cost of the pre-reduced ore in the submerged arc furnace is reduced.
Description
Technical field
The present invention relates to a kind of ironmaking production device and production technique, relate in particular to a kind of aerobic smelting mine heat furnace and aerobic smelting process thereof.
Background technology
Mine heat furnace smelting method is a kind of processing method of iron and steel and non-ferrous metal metallurgy, the core of mineral hot furnace technology is in airtight body of heater, to adopt carbon pole heating, carbonaceous reducing agent reduction, and mineral hot furnace is with bell and whether body of heater is airtight is divided into airtight and semi-closed submerged arc furnace.Mineral hot furnace reducing power is higher than traditional blast furnace technology, production cost is also higher than traditional blast furnace technology simultaneously, it is the product of reducing activity more than blast furnace technology, below Pure Silicon Metal that mineral hot furnace is produced product, such as all kinds of iron alloys: ferrochrome, molybdenum-iron, ferromanganese, ferronickel; All kinds of silicon-containing alloys: ferrosilicon, silicomanganese, silicochromium, ferrosilicoaluminum etc.; Pure Silicon Metal; And calcium carbide.
At present, mineral hot furnace only has under given conditions just as the equipment use of producing molten iron, the publication number that for example the applicant submitted on January 5th, 2012 is that CN102559981A, name are called in the patent application of " gas based smelting reduction iron-smelting method and device ", adopts mineral hot furnace as the supplementary reduction apparatus of gas base reduction.Concrete scheme be TFe content be more than or equal to 62% pellet or lump ore by the reduction of shaft furnace gas base after, obtain reduction degree at prereduction pellet or the lump ore of 85% left and right, the raw material obtaining adopts conventional mineral hot furnace method of reducing to supplement reduction, because metallization iron level is high, the quantity of supplementing reduction is few, need to consume a large amount of electric energy for the fusing of metallized iron, increase smelting cost.Because electric energy is oxidized as its cost of heat energy of deposite metal iron the chemical energy producing far above carbonaceous reducing agent, be the chemical energy that efficiency produces far below carbonaceous reducing agent oxidation, so the scheme of this gas based smelting reduction iron-smelting method and the device high reduction degree pellet of production or lump ore is reasonable not.
Summary of the invention
The heat energy that overcomes carbonaceous reducing agent reduction process needs in existing mine heat furnace smelting technology all derives from the heating of carbon pole, and the technical problem to be solved in the present invention is to provide a kind of aerobic smelting mine heat furnace and aerobic smelting process thereof of reacting the part thermal value of the alternative electrode of chemical energy discharging to the carbonaceous reducing agent that it is excessive with system that mineral hot furnace passes into a small amount of oxygen.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
On the one hand, a kind of aerobic smelting mine heat furnace comprises body of heater, leads to the feeder system of body of heater inside from body of heater, the opening by body of heater top inserts body of heater inside for the electrode device that heats, for discharging the discharge port of molten iron and metallurgical slag, for discharging flue gas ash removal and gas recovery system and the oxygen distribution system of flue gas.Wherein, oxygen distribution system comprises and is positioned at the oxygen distributor that body of heater middle part is located on the lower side.
For above-mentioned aerobic smelting mine heat furnace, oxygen distributor is the 2/5-2.4/5 of height of materials in body of heater to the distance of furnace bottom.
For above-mentioned aerobic smelting mine heat furnace, oxygen distributor is 2.2/5 of the interior height of materials of body of heater to the distance of furnace bottom.
For above-mentioned aerobic smelting mine heat furnace, oxygen distribution system also comprises for detection of the temperature sensor of pre-position temperature of charge in stove, the molten iron detector occurring for detection of the molten iron that whether has fusing in stove, for detection of the discharge port state sensor of discharge port on off state and the oxygen dispensing controller that is connected with oxygen distributor, temperature sensor, molten iron detector and discharge port state sensor respectively.
For above-mentioned aerobic smelting mine heat furnace, oxygen dispensing controller surpasses 900 ℃ or while learning that molten iron detector detects the molten iron that occurs fusing stove in for the temperature of charge at height of materials 1/2nd places in the stove of sending at temperature sensor, starts oxygen distributor and lead to oxygen in stove.
For above-mentioned aerobic smelting mine heat furnace, each flow control nozzle that oxygen distributor comprises the pipeline vertical with the vertical axes of mineral hot furnace, is distributed in a plurality of air outlets on pipeline and is located at respectively each place, air outlet.
For above-mentioned aerobic smelting mine heat furnace, feeder system comprises according to charging order successively connected feed bin group, storehouse lower-weighing measuring apparatus, rubber conveyer, blending bun, feeding control device and elephant trunk group.Wherein, elephant trunk group is provided with securing device.
On the other hand, a kind of aerobic smelting process of mineral hot furnace comprises: the mixture that comprises prereduction ore deposit and carbonaceous reducing agent is added to this mineral hot furnace, the electrode device heating power of this mineral hot furnace, while having the temperature of charge at height of materials 1/2nd places in the molten iron of fusing or stove to surpass 900 ℃, at body of heater middle part, locate on the lower side to pass into oxygen in this mineral hot furnace, with reduction reaction carry out molten iron while running up to predetermined amount, open discharge port and discharge molten iron and slag.
For above-mentioned aerobic smelting process, it is the 2/5-2.4/5 of height of materials in body of heater to the distance of furnace bottom that oxygen passes into position.
For above-mentioned aerobic smelting process, oxygen pass into position to the distance of furnace bottom be in body of heater height of materials 2.2/5.
For above-mentioned aerobic smelting process, the mixture that comprises prereduction ore deposit and carbonaceous reducing agent also comprises lime.
For above-mentioned aerobic smelting process, prereduction ore deposit mixes by weight 1:0.10-0.15:0.05-0.15 with carbonaceous reducing agent and lime.
For above-mentioned aerobic smelting process, prereduction ore deposit and carbonaceous reducing agent and lime are by weight mixing for 1:0.13:0.1.
For above-mentioned aerobic smelting process, oxygen intake is 1/5th to 1/4th chemical equivalents of carbonaceous reducing agent add-on.
For above-mentioned aerobic smelting process, prereduction ore deposit be TFe content be more than or equal to 62% pellet or lump ore by the reduction of shaft furnace gas base after, reduction degree is at pellet or the lump ore of 85% left and right.
For above-mentioned aerobic smelting process, prereduction ore deposit residence time in mineral hot furnace is 1.5 to 2.5 hours.
For above-mentioned aerobic smelting process, prereduction ore deposit residence time in mineral hot furnace is 2 hours.
Compared with prior art, the main advantage of technical solution of the present invention is as follows:
1. the present invention is directed to shaft furnace gas base reduzate---the supplementary reducing process of prereduction ore deposit in mineral hot furnace improves, because the oxide content of iron in prereduction ore deposit is low, the fusing that supplements the iron that metallizes in reduction reaction and prereduction ore deposit all mainly relies on electrode heating to cause production cost to increase, the present invention by passing into oxygen in mineral hot furnace, rely on the combination reaction heat release heating of carbonaceous reducing agent and oxygen, metallization iron in fusing prereduction ore deposit, both reduced power consumption, accelerated again speed of response, reduce prereduction ore deposit and in mineral hot furnace, supplemented the cost of reduction, improved the practicality of existing mineral hot furnace,
2. adopt TFe content be more than or equal to 62% pellet or lump ore by the reduction of shaft furnace gas base after, reduction degree is at prereduction pellet or the lump ore of 85% left and right, this raw material is easy to get, and with low cost.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of the aerobic smelting mine heat furnace described in one embodiment of the invention.
Description of reference numerals:
1---body of heater;
2---feeder system;
21---feed bin group;
22---storehouse lower-weighing measuring apparatus;
23---rubber conveyer;
24---blending bun;
25---feeding control device;
26---elephant trunk group;
3---electrode device;
4---oxygen distribution system;
41---oxygen distributor
5---flue gas ash removal and gas recovery system
51---flue gas delivery line
52---flue gas leadout hole
Embodiment
Fig. 1 is the composition structural representation of the aerobic smelting mine heat furnace described in one embodiment of the invention.The aerobic smelting mine heat furnace of this embodiment is closed electric reduction furnace, comprises body of heater 1, leads to the feeder system 2 of body of heater inside from body of heater, the opening by body of heater top inserts body of heater inside for the electrode device 3 that heats, for discharging the discharge port of molten iron and metallurgical slag, for discharging flue gas ash removal and gas recovery system 5 and the oxygen distribution system 4 of flue gas.Wherein, oxygen distribution system 4 comprise the oxygen distributor 41 that is positioned at body of heater 1 middle part and locates on the lower side, for detection of the temperature sensor of stove pre-position temperature of charge, for detection of stove whether have molten iron detector that the molten iron of fusing occurs, for detection of the discharge port state sensor of discharge port on off state and the oxygen dispensing controller that is connected with oxygen distributor 41, temperature sensor, molten iron detector and discharge port state sensor respectively.
Body of heater 1 is preferably cylindrical, and interior block lagging material and refractory materials are formed for splendid attire furnace charge and the burner hearth that carries out alloy smelting, and at burner hearth bottom, place concordant with furnace bottom is provided with discharge port.
The effect of feeder system 2 is furnace charges of sending here outside splendid attire workshop, comprises according to charging order successively connected feed bin group 21, storehouse lower-weighing measuring apparatus 22, rubber conveyer 23, blending bun 24, feeding control device 25 and elephant trunk group 26.After material in feed bin group 21 in each feed bin weighs by corresponding storehouse lower-weighing measuring apparatus 22 respectively, through rubber conveyer 23, feed into blending bun 24, through feeding control device 25, be given to elephant trunk group 26 again, by elephant trunk group 26, compound be added in body of heater 1.Wherein, storehouse lower-weighing measuring apparatus 22 is display unit of feeding coal, such as electronic scale; Feeding control device 25 regulates feeding coals, in storehouse lower-weighing measuring apparatus 22 vision-control results, this adjustings result indirectly reflect feeding coal number, and material is provided, the weighing precision requirement of storehouse lower-weighing measuring apparatus 22 is in 3%.Elephant trunk group 26 has automatic distribution feed and handoff functionality, timely and accurately required material is added to corresponding position in mineral hot furnace.Elephant trunk group 26 is provided with securing device, and for further improving the stopping property of stove, at non-feed state, the securing device locking in elephant trunk group 26, prevents that smelting exhaust from overflowing.
The effect of electrode device 3 is to produce electric heating by delivering to from the electric current of transformer in furnace charge, for smelting, provides necessary heat.Electrode device 3 comprises carbon pole, Electrode Fluctuation Device, lifting device and grasping device.Wherein, electrode device 3 preferably includes three carbon poles.Electrode device 3 is connected on transformer by short net bus, from the electric current of transformer, is transported on electrode device 3.Short net bus comprises copper pipe and flexible cable.
Flue gas ash removal and gas recovery system 5 comprise flue gas leadout hole 52 and are arranged on the flue gas delivery line 51 in flue gas leadout hole.The effect of flue gas delivery line 51 is that the flue gas producing in mineral hot furnace is discharged to outside stove, is preferably cylindrical water-cooling structure.
The aerobic smelting mine heat furnace of this embodiment also comprises the bell for the opening of closed furnace body 1 top, and the effect of bell is to collect to smelt the flue gas producing.Bell is preferably truncated cone shape, and lower port is connected with body of heater 1, binds with steel construction cover plate in top.Preferably, bell is provided with three electrode holes, two flue gas leadout holes and some explosionproof holes.
The aerobic smelting mine heat furnace of this embodiment also comprises the hydraulic efficiency system moving for the included Electrode Fluctuation Device of drive electrode arrangement 3, lifting device and grasping device, is the propulsion source of Electrode Fluctuation, rise fall of electrodes, electrode holder.This hydraulic efficiency system comprises pumping plant, valve station and pipeline.
The aerobic smelting mine heat furnace of this embodiment also comprises cooling-part and cold water house steward's water coolant is assigned to cooling-part and collects the cooling medium circulation system from the backwater of cooling-part.This cooling medium circulation system comprises water trap, return flume and pipeline.
The smelting principle of aerobic smelting mine heat furnace of the present invention is to heat and melting batch by electric heating, and prereduction ore deposit (direct-reduced iron) and carbonaceous reducing agent are formed compound and are delivered in the body of heater 1 of mineral hot furnace by feeder system 2.At this moment electrode device 3 heating powers of mineral hot furnace, with the metal oxide in carbonaceous reducing agent reduced ore, pass into oxygen through oxygen distributor 41 when the temperature of charge at height of materials 1/2nd places surpasses 900 ℃ in the molten iron of appearance fusing or stove in mineral hot furnace.The liquid metal forming is with slag due to the different natural layerings of proportion, and along with the carrying out of smelting process, liquid metal is assembled at furnace bottom, and slag floats over above metal level.When metal gathers when a certain amount of in stove, open discharge port, liquid metal and slag as much.The chemical energy that utilizes carbonaceous reducing agent oxidation to discharge substitutes the part thermal value of electrode device 3, reduces power consumption, fast reaction speed.
Below, the technical process of the mineral hot furnace aerobic smelting process described in one embodiment of the invention is described.This mineral hot furnace aerobic smelting process mainly comprises the steps:
Step 1, raw material is prepared: prepare prereduction ore deposit, carbonaceous reducing agent and smelt other required raw materials;
Preferably, in step 2, before reduce in described prereduction ore deposit, should mix with carbonaceous reducing agent, lime.Wherein, prereduction ore deposit be preferably TFe content be more than or equal to 62% pellet or lump ore by the reduction of shaft furnace gas base after, reduction degree is at prereduction pellet or the lump ore of 85% left and right, and the typical composition of prereduction pellet or lump ore is that metallic iron 69.56%, ferric oxide are (with Fe
2o
3meter) 17.55% and gangue etc. 12.89%, TFe represents total iron amount, i.e. the resultant of iron in metallic iron and ferric oxide.Carbonaceous reducing agent is preferably blue charcoal or coke powder.Lime contributes to the formation of slag.In mineral hot furnace, according to weight ratio, to calculate, described prereduction ore deposit (direct-reduced iron) is 1:0.10-0.15:0.05-0.15 with the additional proportion of carbonaceous reducing agent and lime, is preferably 1:0.13:0.1.
Oxygen passes into position at the middle part of mineral hot furnace body of heater 1 on the lower side, and being preferably oxygen, to pass into position be the 2/5-2.4/5 of body of heater 1 interior height of materials to the distance of furnace bottom, and more preferably to pass into position be 2.2/5 of body of heater 1 height of materials to the distance of furnace bottom to oxygen.By closed conduit, at the middle part of mineral hot furnace body of heater 1 oxygen that position passes on the lower side, compound more than position reacts and emits a large amount of heat energy with this, these heat energy have improved the fusing of charge-temperature promotion metallization iron, the gas (carbon monoxide and carbonic acid gas) generating is discharged from flue gas ash removal and the gas recovery system 5 at mineral hot furnace top, the iron of fusing flows downward in formation molten bath, mineral hot furnace bottom, a part for the ferriferous oxide of retaining in prereduction ore deposit completes reduction reaction on mineral hot furnace top by vapour phase reduction, major part is by the melting and reducing in molten bath, to complete reduction reaction in mineral hot furnace bottom.Because oxygen only with pass into furnace charge more than position, the carbon monoxide that bottom produces reacts, so avoided oxygen to contact with the molten iron of fusing the oxidation that causes iron.The strict oxygen multiple spot low discharge mode of controlling passes into, and avoids the danger that the fierce sharply heating causing of oxygen reaction district reaction can not rapid diffusion.Low discharge multiple spot passes into that the oxygen of closed submerged stove has been heated with in mineral hot furnace and temperature reaches 900 ℃ of above carbonaceous reducing agents and react and emit large calorimetric rapidly, reduces the demand that electrode device 3 is generated heat.The oxygen passing into can be industrial oxygen, can be also oxygen-rich air or air, preferably industrial oxygen.The intake of oxygen is about 1/5th to 1/4th chemical equivalents (to generate carbonyl meter) of carbonaceous reducing agent add-on.
Prereduction ore deposit is motion from top to bottom in mineral hot furnace, at the discharge port of mineral hot furnace furnace bottom, discharges molten iron and slag.The by-product gas that reduction process produces is motion from bottom to top in mineral hot furnace, becomes reduction tail gas, from flue gas ash removal and the gas recovery system 5 at mineral hot furnace top, discharges, and this reduction tail gas gives other users to use after the processing such as purifying and dedusting.Electrifying electrodes heating in mineral hot furnace, and oxygen reacts the heat energy of emitting with compound, metallization iron in fusing said mixture furnace charge, the iron of fusing flows downward in formation molten bath, mineral hot furnace bottom, carbonaceous reducing agent reduces remaining ferric oxide, the liquid metal of formation with slag due to the different natural layerings of proportion.Along with the carrying out of smelting process, liquid metal is assembled at furnace bottom, and slag floats over above metal level.The slag suspending on the liquid metal that above-mentioned reduction process produces and liquid metal gathers when a certain amount of in stove, opens discharge port, and liquid metal and slag are discharged mineral hot furnace in the lump.Molten iron and the slag of in mineral hot furnace external application ladle, receive discharging, receive and close discharge port to completely time, continues to smelt, and the molten iron obtaining after simultaneously adopting the conventional deslagging method of skimming to process is sent into next process, for example power transmission stove (or converter) steel-making.
The mineral hot furnace aerobic smelting process of this embodiment, described prereduction ore deposit residence time in mineral hot furnace is 1.5 to 2.5 hours, preferably 2 hours.
The advantage that example by below has while further illustrating the concrete scheme of aerobic smelting mine heat furnace of the present invention and aerobic smelting process thereof and actual production.
Example 1
The present embodiment is raw materials used is prereduction pellet, and its chemical composition is as shown in table 1
Table 1: the chemical composition of prereduction pellet (in table, the unit of numerical value is all weight percentage)
| Title | TFe | Metallic iron | Fe 2O 3 | Gangue |
| Content/% | 81.85 | 69.56 | 17.55 | 12.89 |
This example oxygen used is general industry oxygen, and gas purity is 99%.
The processing condition that mineral hot furnace aerobic is smelted are as follows:
The compound being made into comprises prereduction pellet (kg): blue carbon (kg): quickened lime (kg)=1:0.10-0.15:0.05-0.15, is preferably 1:0.13:0.1;
Mineral hot furnace is chosen 27000kVA mineral hot furnace production line; The mineral hot furnace type of furnace is diameter 12000mm, height 5500mm; Compound adds 250 tons/hour to 300 tons/hour of speed, preferably 275 tons/hour; Oxygen intake is 2500m
3/ hour to 3500m
3/ hour, preferred 3000m
3/ hour; Oxygen passes into position apart from furnace bottom 2000mm to 2400mm, is preferably 2200mm.
Above-mentioned compound is added to mineral hot furnace, energising heating while reaching more than 3.3 meters to controlling level, and continue to add material to material to fill it up with, stop the reinforced energising heating that continues, approximately switch on after 8 hours, have liquid metal iron to generate, now pass into oxygen, oxygen flow 3000m
3/ hour, reduction process and liquid metal iron generative process are accelerated.The slag suspending on liquid metal and liquid metal gathers when a certain amount of in stove, opens discharge port, closes oxygen simultaneously, and liquid metal and slag are discharged outside mineral hot furnace in the lump, and boiler face material declines.After closing discharge port, it is that compound adds 250 tons to 300 tons/hour of speed, preferably 275 tons/hour that recovery material is added to normality.The slag suspending on liquid metal and liquid metal gathers when a certain amount of in stove, again opens discharge port, and liquid metal and slag are discharged outside mineral hot furnace in the lump.After skimming slagging-off, stove external application obtains molten iron.Gained molten iron power transmission stove (or converter) steel-making.After this excess Temperature in stove enters normality and smelts, if can adopt the mode of being interrupted energising to control temperature in stove.Under identical working condition, in the situation of production identical weight molten steel, mineral hot furnace of the present invention is compared current consumption with existing electrothermal oven and is greatly reduced.
Claims (17)
1. an aerobic smelting mine heat furnace, comprise body of heater (1), from body of heater, lead to the feeder system (2) of body of heater inside, that the opening by body of heater top inserts body of heater is inner for the electrode device (3) that heats, for discharging the discharge port of molten iron and metallurgical slag and for discharging flue gas ash removal and the gas recovery system (5) of flue gas, it is characterized in that, this mineral hot furnace also comprises oxygen distribution system (4), and oxygen distribution system (4) comprises and is positioned at the oxygen distributor (41) that body of heater (1) middle part is located on the lower side.
2. aerobic smelting mine heat furnace as claimed in claim 1, is characterized in that, oxygen distributor (4) is the 2/5-2.4/5 of the interior height of materials of body of heater (1) to the distance of furnace bottom.
3. aerobic smelting mine heat furnace as claimed in claim 2, is characterized in that, oxygen distributor (4) is 2.2/5 of the interior height of materials of body of heater (1) to the distance of furnace bottom.
4. aerobic smelting mine heat furnace as claimed in claim 1, it is characterized in that, oxygen distribution system (4) also comprises for detection of the temperature sensor of pre-position temperature of charge in stove, the molten iron detector occurring for detection of the molten iron that whether has fusing in stove, for detection of the discharge port state sensor of discharge port on off state and the oxygen dispensing controller that is connected with oxygen distributor (41), temperature sensor, molten iron detector and discharge port state sensor respectively.
5. aerobic smelting mine heat furnace as claimed in claim 4, it is characterized in that, oxygen dispensing controller surpasses 900 ℃ or while learning that molten iron detector detects the molten iron that occurs fusing stove in for the temperature of charge at height of materials 1/2nd places in the stove of sending at temperature sensor, starts oxygen distributor (41) and lead to oxygen in stove.
6. aerobic smelting mine heat furnace as claimed in claim 1, it is characterized in that each flow control nozzle that oxygen distributor (41) comprises the pipeline vertical with the vertical axes of mineral hot furnace, is distributed in a plurality of air outlets on pipeline and is located at respectively each place, air outlet.
7. aerobic smelting mine heat furnace as claimed in claim 1, it is characterized in that, feeder system (2) comprises according to charging order successively connected feed bin group (21), storehouse lower-weighing measuring apparatus (22), rubber conveyer (23), blending bun (24), feeding control device (25) and elephant trunk group (26), wherein, elephant trunk group (26) is provided with securing device.
8. the aerobic smelting process of a mineral hot furnace, it is characterized in that, the method comprises: the mixture that comprises prereduction ore deposit and carbonaceous reducing agent is added to this mineral hot furnace, the electrode device of this mineral hot furnace (3) heating power, while having the temperature of charge at height of materials 1/2nd places in the molten iron of fusing or stove to surpass 900 ℃, at body of heater (1) middle part, locate on the lower side to pass into oxygen in this mineral hot furnace, with reduction reaction carry out molten iron while running up to predetermined amount, open discharge port and discharge molten iron and slag.
9. aerobic smelting process as claimed in claim 8, is characterized in that, it is the 2/5-2.4/5 of the interior height of materials of body of heater (1) to the distance of furnace bottom that oxygen passes into position.
10. aerobic smelting process as claimed in claim 9, is characterized in that, it is 2.2/5 of the interior height of materials of body of heater (1) to the distance of furnace bottom that oxygen passes into position.
11. aerobic smelting processes as claimed in claim 8, is characterized in that, the mixture that comprises prereduction ore deposit and carbonaceous reducing agent also comprises lime.
12. aerobic smelting processes as claimed in claim 11, is characterized in that, prereduction ore deposit mixes by weight 1:0.10-0.15:0.05-0.15 with carbonaceous reducing agent and lime.
13. aerobic smelting processes as claimed in claim 12, is characterized in that, prereduction ore deposit and carbonaceous reducing agent and lime are by weight mixing for 1:0.13:0.1.
14. aerobic smelting processes as claimed in claim 8, is characterized in that, oxygen intake is 1/5th to 1/4th chemical equivalents of carbonaceous reducing agent add-on.
15. aerobic smelting processes as claimed in claim 8, is characterized in that, prereduction ore deposit be TFe content be more than or equal to 62% pellet or lump ore by the reduction of shaft furnace gas base after, reduction degree is at pellet or the lump ore of 85% left and right.
16. aerobic smelting processes as claimed in claim 8, is characterized in that, prereduction ore deposit residence time in mineral hot furnace is 1.5 to 2.5 hours.
17. aerobic smelting processes as claimed in claim 16, is characterized in that, prereduction ore deposit residence time in mineral hot furnace is 2 hours.
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Cited By (5)
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| CN105420497A (en) * | 2015-11-16 | 2016-03-23 | 西安电炉研究所有限公司 | Continuous feeding high-titanium-slag smelting electric furnace system based on energy balance |
| CN110081703A (en) * | 2019-06-13 | 2019-08-02 | 大连重工机电设备成套有限公司 | Closed no fixed anode DC-ore-heating furnace |
| CN112195300A (en) * | 2020-08-18 | 2021-01-08 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
| CN113710819A (en) * | 2019-04-22 | 2021-11-26 | 日本制铁株式会社 | Method for producing chromium-containing iron liquid |
| CN114599926A (en) * | 2019-11-07 | 2022-06-07 | 三菱重工业株式会社 | Electrolytic smelting furnace and electrolytic smelting method |
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| CN105420497A (en) * | 2015-11-16 | 2016-03-23 | 西安电炉研究所有限公司 | Continuous feeding high-titanium-slag smelting electric furnace system based on energy balance |
| CN113710819A (en) * | 2019-04-22 | 2021-11-26 | 日本制铁株式会社 | Method for producing chromium-containing iron liquid |
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| CN110081703A (en) * | 2019-06-13 | 2019-08-02 | 大连重工机电设备成套有限公司 | Closed no fixed anode DC-ore-heating furnace |
| CN110081703B (en) * | 2019-06-13 | 2024-02-02 | 大连重工机电设备成套有限公司 | Closed direct-current submerged arc furnace without fixed anode |
| CN114599926A (en) * | 2019-11-07 | 2022-06-07 | 三菱重工业株式会社 | Electrolytic smelting furnace and electrolytic smelting method |
| CN114599926B (en) * | 2019-11-07 | 2024-06-11 | 三菱重工业株式会社 | Electrolytic smelting furnace and electrolytic smelting method |
| CN112195300A (en) * | 2020-08-18 | 2021-01-08 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
| CN112195300B (en) * | 2020-08-18 | 2022-06-03 | 北京中冶设备研究设计总院有限公司 | Device and method for smelting ferro-silico-aluminum from ferro-nickel slag |
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| CN103525963B (en) | 2015-07-15 |
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