CN206014996U - Hydrogen plasma fused reduction iron-smelting system - Google Patents
Hydrogen plasma fused reduction iron-smelting system Download PDFInfo
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- CN206014996U CN206014996U CN201620786039.5U CN201620786039U CN206014996U CN 206014996 U CN206014996 U CN 206014996U CN 201620786039 U CN201620786039 U CN 201620786039U CN 206014996 U CN206014996 U CN 206014996U
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Abstract
The utility model discloses a kind of system of hydrogen plasma fused reduction iron-smelting, including air supply system etc.；Air supply system provides hydrogen and argon, and hydrogen and argon are according to 5:1～4:1 ratio forms mixed gas；Power-supply system provides arc starting voltage and DC current for plasma gun；Mixed gas are ionized as high-temperature plasma in the presence of high frequency voltage and electric arc, and high-temperature plasma is ejected to fusion reduction reaction furnace and forms plasma flame by plasma gun；Iron ore powder is delivered to fusion reduction reaction furnace plasma flame region by powder-supply system, iron ore is melted by high temperature plasma flame, and there is the metallic iron that reduction reaction generates molten state with hydrogen plasma, fusion reduction reaction furnace is provided with molten iron outlet, slag exit.This utility model changes the dependence of the smelting to Fossil fuel of metallic iron, it is to avoid pollution of the pollution gas produced in smelting process to surrounding.
Description
Technical field
This utility model is related to industry metallurgy field, and in particular to a kind of hydrogen plasma fused reduction iron-smelting system.
Background technology
After entering for 20th century, blast furnace ironmaking high speed development, current blast furnace technology are highly developed, and refine at present
The main production process of ferrum.But, with the development of blast furnace, its problems faced is also increasingly severe, is mainly reflected in blast furnace refining
The furnace charge of the block and certain grade of ferrum needs, but the fast development with steel and iron industry scale, the high iron mine of quality gradually disappear
Losing, for lean ore can only just carry out selected, then agglomeration being sintered to fines, ironmaking cost remains high；Meanwhile, blast furnace coking coal
Too many, coking coal demand rapid growth is consumed, but coking coal reserves are limited, coking coal supply is not enough, and coking coal resource is increasingly poor, coking coal
Price also gradually increases, and promotes ironmaking cost to increase；In addition, sintering deposit, pellet, coking and blast fumance mistake are being made
One of " three wastes " the severe contamination air produced in journey, soil and water source, and cause the factor of the serious haze of China.These are compeled
Iron smelting method outside making people begin look for some blast furnace ironmakings, finds and does not rely on coking coal and more economic and environment-friendly ironmaking
Mode.
The non-blast furnace ironmaking mode that develops at present mainly has direct-reduction and melting and reducing two ways, direct-reduction stream
The product of journey is the sponge iron of solid-state, and the product of Smelting Reduction Process is the pig iron of liquid.Direct-reduction process is limited to fire with gas
Material, liquid fuel or mill coal are the energy, are that below the softening temperature in iron ore (or iron content agglomerate) in solid-state is reduced
The method for obtaining metallic iron.As reduction temperature is low, in porous low-density sponge shape structure, carbon containing is low, does not exclude stone-like pulse for product
The metal iron product of impurity, claims DRI (DRI) or sponge iron.
Melting and reducing is another non-blast furnace ironmaking flow process, and the principle that melting and reducing is suggested is carbon containing molten iron in high-temperature fusion
The iron ore melted with the slag of iron content under state produces reaction.Reduction reaction speed between high-temperature liquid state is than gas-solid
Between body, response speed is faster.Later with the progress of real work, general with mill coal as the energy, ferrum is carried out under high temperature melt
Oxide is reduced, and slag iron can be kept completely separate, and the technique for obtaining the carbon containing molten iron of similar blast furnace is referred to as melting and reducing.According to technique
Melting and reducing can be divided into three-stage, two-part, four class of one-part form and electrothermal way by pattern.Three-stage Smelting Reduction Process can divide
For reduction and melting gas making two large divisions, reduction part is exactly reduction section, and melting gas making part then includes in the same apparatus
Melting gas making section and gas reforming section, its are structurally characterized in that one carbon containing bed of material of presence above molten bath.Two-period form is also by reducing
Part and melting gas making part constitute, and are therefore referred to as two step method with three-stage again, and two-period form is molten with the main distinction of three-stage
There is no the carbon containing bed of material above molten bath in refining Gas-making Furnace, some two-period form flow processs in order to solve also Primordial Qi composition and temperature problem,
An also Primordial Qi modification stove is addition of between smelting furnace and reduction furnace.One-part form flow process only has melting section, without reduction section.Existing
The one-part form flow process and two-period form flow process of generationization adopts iron liquid furnace smelting equipment, and therefore the two is referred to as iron bath process again.Three-stage
It is made up of coal base flow journey and burnt base flow journey, two-period form and one-part form are then made up of coal base flow journey, and three of the above type is sometimes referred to
For oxygen coal flow process, electric heating rule is referred to as electric coal flow process.
Last century the eighties, the plant modification of the direct-reduction process of a production sponge iron is by Aktiebolaget SKF of Sweden
Plasmared (plasma deoxidization) device, industrially accomplished as thermal source production DRI with plasma.
In this technique, plasma generator is arranged on plasma gasification furnace, for coal gas process.Coal or other fuel and oxidant
(such as water or oxygen) reacts, and generates direct-reduction gas, and main component is H2And CO.High temperature reduction gas through desulfurizer, with white
Shaft kiln directly reduced use is supplied to after marble desulfurization.In gasification furnace, coal gasification institute calorific requirement is most of relies on carbon oxygen combustion reaction
Heat release, small part are supplied by plasma generator, to maintain appropriate gasification temperature, so as to ensure to be gasified totally, and well
The control also quality of Primordial Qi and slag temperature.Ferric charge used by technique is lump ore, pellet.Product is DRI, metal
Rate 93%, phosphorus content is maintained at 1.5%.
Several ironmaking flow processs have difference the equipment and process aspect more above, but do not change technique in smelting process
Dependence to conventional fossil fuel, inevitably produces some contaminatives in the gasification of Fossil fuel and combustion process and produces
Thing, improves less in terms of iron-smelting process environmental benefit is improved.
Utility model content
This utility model solve technical problem be：The deficiencies in the prior art, this utility model are overcome to provide a kind of hydrogen
Plasma fusion reduction iron production system, changes dependence of the smelting process of traditional metallic iron to Fossil fuel, it is to avoid smelt
During pollution of the pollution gas to surrounding that produce.
The technical scheme adopted by this utility model is：A kind of hydrogen plasma fused reduction iron-smelting system, including supply
System, power-supply system, plasma gun, powder-supply system and fusion reduction reaction furnace；The air supply system provides hydrogen and argon,
Hydrogen and argon are according to 5:1～4:1 ratio forms mixed gas, used as the working gas of plasma gun；The power-supply system
Arc starting voltage and DC current are provided for plasma gun；Working gas is ionized as height in the presence of high frequency voltage and electric arc
High-temperature plasma is ejected to fusion reduction reaction furnace and forms plasma flame by isothermal plasma, plasma gun；For powder
Iron ore powder is delivered to fusion reduction reaction furnace plasma flame region by system, and iron ore is by high temperature plasma flame
Melting, and there is the metallic iron that reduction reaction generates molten state with hydrogen plasma, fusion reduction reaction furnace is provided with molten iron and goes out
Mouth, slag exit.
The fusion reduction reaction furnace has the copper reacting furnace wall with water-cooled.
The powder-supply system includes powder feeding equipment, powder feeding pipe, powder feeding pipe water collar and turbulence chamber, powder feeding equipment include charge door,
Powder cabin and the capstan being arranged in powder cabin, agitator and feeding Luo Gang, mineral powder enter powder cabin by charge door, by leading
Turbulence chamber is sent in the transmission of axle, the mineral powder after agitator is stirred by feeding Luo Gang, and mineral powder is abundant with carrier gas in the turbulent flow room
Mixing, carrier gas are carried mineral powder and are entered at fusion reduction reaction furnace high temperature plasma flame by powder feeding pipe, powder feeding pipe cloth
Put in powder feeding pipe water collar.
The powder feeding pipe is double-deck ring set structure, and internal layer powder body passage is wear-resistant ceramic material, and outer layer is high-termal conductivity gold
Category copper.
This utility model advantage compared with prior art is：
(1) dependence to Fossil fuel is changed, the spatter property of the smelting process of metallic iron is improve, meanwhile, obtain
Product phosphorus content, oxygen content are low, can use as target ferrum.
(2) this utility model take full advantage of arc-plasma temperature high, active high the characteristics of, arc plasma bromhidrosis
The temperature of group can reach more than 3000K, and central temperature even can exceed 10000K, and ore particles are through high temperature plasma flame
When can melt in a short period of time, while activity is big in hot environment, the reduction for accelerating ferrum oxide in Ore is anti-
Should；
(3) this utility model take full advantage of arc-plasma atmosphere adjustable the characteristics of, choose hydrogen as spray gun
Working gas, simultaneously as the reduction reaction that reducing agent directly participates in components of iron ore ferrum oxide.
Description of the drawings
Fig. 1 is system schematic of the present utility model；
Fig. 2 is powder feeding equipment schematic diagram；
Label in figure：1- plasma gun negative electrodes；2- plasma gun anodes；3- negative electrode water inlet components；4- negative electrode backwater
Component；5- anode water inlet components；6- anode backwater components；7- spray gun air intake assemblies；8- water pumps；9- heat exchangers；10- rectified currents
Source；11- fusion reduction reaction furnace walls；12- insulated enclosure components；13- powder feeding equipments；14- powder feeding pipe water collars；15- powder feeding pipes；
16- motors；17- air gauges；18- Balance Air imports；19- charge doors；20- powder cabins；21- capstans；22- agitators；23- feedings
Luo Gang；24- turbulence chamber.
Specific embodiment
This utility model is described in further detail below in conjunction with accompanying drawing.
As shown in figure 1, hydrogen plasma fused reduction iron-smelting system, including air supply system, power-supply system, plasma spray
Rifle, powder-supply system and fusion reduction reaction furnace；The air supply system provides hydrogen and argon, and wherein hydrogen and argon is according to 5:1
～4:1 ratio carries out being mixed to form mixed gas, and used as the working gas of plasma gun, power-supply system includes DC rectifier electricity
Source 10 and high frequency open arc power, and rectifier power source adopts newest power electronic element IGBT insulated gate bipolar transistors whole for core
Fluid element, main circuit adopt 12-phase rectification, export DC current stability bandwidth≤2%；Set DC rectification power 10 and export electricity
Argon is sent into plasma gun by air intake assembly 7 by stream, air supply system, and high frequency opens arc power and is added in high frequency voltage 15000V
Between spray gun negative electrode 1 and spray gun anode 2, interelectrode argon was punctured by moment, produced electric arc, then DC rectification power system
Output galvanic current stream maintains stablizing for electric arc in plasma gun, and hydrogen is mixed according to the above ratio by air supply system with argon
Conjunction is continuously fed to plasma gun, and in the presence of high frequency voltage and electric arc, hydrogen and argon are ionized as high-temperature plasma,
And fusion reduction reaction furnace is ejected into from spray gun spout, form high temperature plasma flame.Therefore, plasma flame is actual is
On the one hand the high temperature hydrogen of high speed rotation, argon plasma air-flow, lance outlet High Temperature Rotating air-flow achieve the stable electric arc of cyclone,
On the other hand the hybrid reaction time of high-temperature plasma and mineral dust can be increased.
Iron ore powder is delivered to fusion reduction reaction furnace gas ions flame region by powder-supply system, and iron ore is by high temperature etc.
Gas ions flame is melted, and the hydrogen after ionization becomes hydrogen plasma and reduction occurs instead as ferrum oxide in reducing agent, with Ore
The metallic iron of molten state should be generated.The melt ferrum that the reduction of have by oneself in Ore and ferrum oxide is obtained is in fusion reduction reaction furnace bottom
Follow-up equipment processed is exited into by molten iron outlet, the impurity component and its oxide in Ore is then swum in molten state
Molten iron surface, exits into follow-up equipment by slag exit and is processed.Fusion reduction reaction furnace has copper anti-with water-cooled
Answer the outlet of stove wall 11, molten iron, slag exit and the high-temperature insulation black box supporting with plasma gun.
Powder-supply system includes powder feeding equipment 13, powder feeding pipe 15, powder feeding pipe water collar 14 and turbulence chamber 24.As shown in Fig. 2 giving powder
Device 13 includes charge door 19, powder cabin 20 and the capstan 21 being arranged in powder cabin 20, agitator 22 and feeding spiral shell thick stick 23, iron mine
Stone grinds through crusher in crushing, flour mill and the dried mineral powder of drying machine enters powder cabin 20 by charge door 19, by master
Turbulence chamber 24 is sent in the transmission of guide shaft 21, the mineral powder after agitator 22 is stirred by feeding spiral shell thick stick 23, mineral powder in the turbulent flow room
It is sufficiently mixed with carrier gas, carrier gas can be argon or other noble gases, carrier gas is carried mineral powder and entered by powder feeding pipe 15
Fusion reduction reaction furnace high temperature plasma flame root, and mix with high-temperature plasma and exchange heat, in high-temperature plasma
In the presence of body flame, mineral dust melts at short notice, the iron oxide composition in Ore and highly active hydrogen plasma
Produce chemical reduction reaction.In operation by measuring powder cabin before and after weight calculate powder feeding equipment powder-supplying speed (powder cabin in the unit interval
The variable quantity of weight is powder-supplying speed), powder-feeding amount is controlled by 16 rotating speed of governor motor, meanwhile, in order to ensure that powder falling is smooth
Uniformly, one gas being drawn outside storehouse from carrier gas powder cabin being entered by Balance Air import 18 as Balance Air, air gauge 17 is used for supervising
Survey air pressure in powder cabin.Powder feeding pipe 15 is arranged in the powder feeding pipe water collar 14 of spray gun periphery, to protect powder feeding pipe not by reacting furnace
Interior high temperature scaling loss.Powder feeding pipe 15 is double-deck ring set structure, and internal layer powder body passage is wear-resistant ceramic material, and outer layer is high-termal conductivity gold
Category copper.
The plasma gun includes that spray gun negative electrode 1, anode 2, negative electrode water inlet component 3, negative electrode backwater component 4, anode enter
Water assembly 5, anode backwater component 6 and air intake assembly 7, cooling water are entered by negative electrode water inlet component 3 and anode water inlet component 5 respectively
Enter and anode and negative electrode are cooled down, electrode is prevented by high-temperature electric arc ablation.Plasma gun negative electrode and spray gun anode are all designed
For tubular structure, regulation plasma gun power, spray gun quantity, powder-feeding amount can be passed through in application different with reaction furnace volume realization
Production scale.
Cooling water system includes deionized water water tank, water pump and heat exchanger composition, provides cooling water for each system above-mentioned.
The undisclosed technology of this utility model belongs to general knowledge as well known to those skilled in the art.
Claims (4)
1. a kind of hydrogen plasma fused reduction iron-smelting system, it is characterised in that including air supply system, power-supply system, plasma
Spray gun, powder-supply system and fusion reduction reaction furnace；The air supply system provides hydrogen and argon to plasma gun, as wait from
The working gas of sub- spray gun；The power-supply system provides arc starting voltage and DC current for plasma gun；Working gas is in height
It is ionized in the presence of frequency voltage and electric arc as high-temperature plasma, high-temperature plasma is ejected to melting also by plasma gun
Former reacting furnace forms high temperature plasma flame；Iron ore powder is delivered to fusion reduction reaction furnace high-temperature plasma by powder-supply system
Flame region, fusion reduction reaction furnace are provided with molten iron outlet, slag exit.
2. hydrogen plasma fused reduction iron-smelting system according to claim 1, it is characterised in that the melting and reducing is anti-
Stove is answered there are copper reacting furnace wall (11) with water-cooled.
3. hydrogen plasma fused reduction iron-smelting system according to claim 1 and 2, it is characterised in that the confession powder system
System includes that powder feeding equipment (13), powder feeding pipe (15), powder feeding pipe water collar (14) and turbulence chamber (24), powder feeding equipment (13) include charge door
(19), powder cabin (20) and the capstan (21) being arranged in powder cabin (20), agitator (22) and feeding Luo Gang (23), mineral powder
Powder cabin (20) is entered by charge door (19), by the transmission of capstan (21), after feeding Luo Gang (23) is by agitator (22) stirring
Mineral powder send into turbulence chamber (24), in turbulence chamber (24), interior mineral powder is sufficiently mixed with carrier gas, carrier gas carrying mineral powder pass through
Powder feeding pipe (15) is entered at fusion reduction reaction furnace high temperature plasma flame, and powder feeding pipe (15) is arranged in powder feeding pipe water collar
(14) in.
4. hydrogen plasma fused reduction iron-smelting system according to claim 3, it is characterised in that powder feeding pipe (15)
For double-deck ring set structure, internal layer powder body passage is wear-resistant ceramic material, and outer layer is high thermal conductive metallic copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620786039.5U CN206014996U (en) | 2016-07-22 | 2016-07-22 | Hydrogen plasma fused reduction iron-smelting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620786039.5U CN206014996U (en) | 2016-07-22 | 2016-07-22 | Hydrogen plasma fused reduction iron-smelting system |
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| CN206014996U true CN206014996U (en) | 2017-03-15 |
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| CN201620786039.5U Active CN206014996U (en) | 2016-07-22 | 2016-07-22 | Hydrogen plasma fused reduction iron-smelting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110951973A (en) * | 2019-12-17 | 2020-04-03 | 北京科技大学 | Method for extracting titanium from titanium-containing blast furnace slag based on hydrogen plasma method |
-
2016
- 2016-07-22 CN CN201620786039.5U patent/CN206014996U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110951973A (en) * | 2019-12-17 | 2020-04-03 | 北京科技大学 | Method for extracting titanium from titanium-containing blast furnace slag based on hydrogen plasma method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 16 Fucheng Road, Haidian District, Beijing 100048 Co-patentee after: China Aerospace Aerodynamic Technology Institute Patentee after: Aerospace Shenjie (Beijing) Technology Development Co., Ltd. Address before: No. 16 Fucheng Road, Haidian District, Beijing 100048 Co-patentee before: China Aerospace Aerodynamic Technology Institute Patentee before: Aerospace God Jie (Beijing) Environmental Protection Technology Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder |