CN203200287U - Melting reduction iron-making system employing electricity-coal method - Google Patents

Melting reduction iron-making system employing electricity-coal method Download PDF

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CN203200287U
CN203200287U CN 201320123198 CN201320123198U CN203200287U CN 203200287 U CN203200287 U CN 203200287U CN 201320123198 CN201320123198 CN 201320123198 CN 201320123198 U CN201320123198 U CN 201320123198U CN 203200287 U CN203200287 U CN 203200287U
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reduction iron
coal
iron
making
iron production
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陈存运
谷宝康
马亚刚
史建宏
刘征
屈光亚
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陈存运
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Abstract

The utility model relates to a melting reduction iron-making system employing an electricity-coal method. Blast furnace iron-making is a main body for iron-making production, and other non-coking-coal fuel needs to be adopted to replace metallurgical coke so as to reduce the iron-making cost due to high dependence on the metallurgical coke. The melting reduction iron-making system employing the electricity-coal method disclosed by the utility model orderly comprises a large-inclination-angle metal pellet heat transfer device, a thermal storage bin, a horizontal metal pellet heat transfer device, an electricity-coal melting reduction iron-making furnace body and a tilting furnace platform; melting reduction iron-making is carried out by the electricity-coal method. By virtue of the melting reduction iron-making system, energy and material structures can be optimized, and resources can be reasonably utilized; a unique furnace body structure is designed, and a comprehensive utilization technology of high-temperature smoke and CO recovery is adopted, so that afterheat can be utilized, and the CO can be recovered as a reducing agent for reducing metal pellets; water quenching slag can be comprehensively utilized as a raw material for preparing cement. Thus, the iron-making cost is effectively reduced.

Description

The molten minute reduction iron production system of a kind of electric coal method
Technical field
The utility model relates to a kind of metallurgical equipment of non-blast furnace ironmaking, is specifically related to the molten minute reduction iron production system of a kind of electric coal method.
Background technology
Blast furnace ironmaking is the main body of ironmaking production.Through development over a long time, its technology is very ripe.But it also exists intrinsic deficiency, and namely it is to the strong dependence of metallurgical coke.Along with the day by day poorness of coking coal resource, the resource price of metallurgical coke is more and more higher.In contrast, contain abundant cheap mill coal resource and in ironmaking production, then can not get sufficient utilization.In order to reduce ironmaking cost, people are always in the approach of constantly making great efforts to seek to replace with other mill coal fuel metallurgical coke.
In addition, the long-term dependence on import of high-quality iron ore that China's blast furnace ironmaking is required, and often be subjected to the restriction of international vendor.How to develop the abundant poor iron ore deposit of China's reserves and produce molten iron, more and more become steel production in China problem in the urgent need to address.Therefore, China and even to develop in the world the requirement that non-blast furnace ironmaking produces also more and more urgent.For this reason, through the long-term research and development of metallargist, begun to take shape so far with direct-reduction and the molten modernized non-blast furnace ironmaking technology that is reduced to main body of dividing.But present non-blast furnace ironmaking technology and equipment both domestic and external also ubiquity the problems such as complex process, investment is large, energy consumption is high.
China have the development non-blast furnace ironmaking in the urgent need to and supremacy clause.How for the current conditions of coal in China and iron ore resource, development, exploitation replace the metallized pellet of metallurgical coke production as raw material take mill coal fuel, produce molten iron by molten minute reducing process, technique is applicable, less investment instant effect, a molten minute reduction apparatus that energy consumption is low, is of great practical significance and bright prospects.
Summary of the invention
The purpose of this utility model provides and a kind ofly adopts metallized pellet that gas base or coal-based direct reduction iron ore produce as raw material, by electric-arc heating with add reductive agent with the molten minute reduction iron production system of the electric coal method of metallized pellet fusing, reduction and slag iron separation of produced liquid pig iron.
The technical scheme that the utility model adopts is:
The molten minute reduction iron production system of a kind of electric coal method is characterized in that:
Sequentially including high spud angle metal pelletizing heat in the described system send device, insulation storage bin, horizontal metal pelletizing heat to send device, electric coal method molten minute reduction iron production body of heater and turndown platform.
Described high spud angle metal pelletizing heat send the transfer passage of device to be the travelling belt from the low level to a high position; travelling belt whole process arranges the protective guard of sealing; the lower position place arranges drive unit and chain mat machine, and higher position place arranges nitrogen protection device supplying nitrogen in the transfer passage.
Described insulation storage bin is provided with discharging bin, vibrating material feeding device and weighing storehouse from top to bottom, and the vibrating material feeding device lower end is provided with refrigerating unit, and weighing is provided with weighing device in the storehouse.
Described insulation storage bin is supported by Steel Bracket.
It is the screw feeding device with drive unit that described horizontal metal pelletizing heat is sent the core component of device, and screw feeding device places waste heat dedusting composite channel, and the screw feeding device exit is provided with attemperator;
The lower end of waste heat dedusting composite channel is also simultaneously as compound conveying cleaning shaft.
The bottom of the molten minute reduction iron production body of heater of described electric coal method is the spherical end, and top, the spherical end is the straight flange cylindrical shell, and the straight flange cylinder top cover has water cooled cover, integral sealing; The top of straight flange cylindrical shell is provided with water-cooled solid matter coil pipe;
Water cooled cover is the pipe-type water-cooling structure that the weldless steel tube solid matter is welded, and is comprised of the upper central lid on bell body and bell body top, and upper center tops is provided with cleaning shaft and feeding chute;
Lower portion of furnace body is provided with the iron notch of the long grain of low level and the ash shoot of high-order short grain.
Be provided with the stirring rifle in the molten minute reduction iron production body of heater of described electric coal method.
The molten minute reduction iron production body of heater complete installation of described electric coal method is on the turndown platform;
The turndown platform is provided with two semicircular arc supports, and the support below has been provided with support roller, and the bottom of support one side is provided with the turndown oil cylinder, and opposite side is provided with horizontal support.
The utlity model has following advantage:
1) optimize the energy and raw material mix, make rational use of resources:
Reduction in molten minute of the present utility model is produced molten iron with common coal and electric energy (electric-arc heating) as main energy sources, furnace charge can be in a large number or all (100 ﹪) adopt general grade metallized pellet with all iron content (TFe) 〉=70% of the abundant poor iron ore deposit production of China's standing stock as main raw material.Adopt that metallized pellet heat is sent, the hot charging technology, the insulation of storage bin and screw feed mechanism and non-oxidizing atmosphere resist technology have reduced the secondary oxidation of metal pelletizing, reduce the energy consumption save energy.According to heat calculation, 100 ℃ of every risings of the temperature of metal pelletizing material can saves energy~23Kw.h.
2) the utility model has adopted unique furnace binding.
Stirring rifle rifle body of the present utility model can about, swing and the forward-reverse agitation molten pool, stir rifle and can spray that carbon dust reduces and carburetting, the heat energy that produces of carbon dust burning also is a kind of supplementary energy in addition; Slag tap or tap a blast furnace and adopted in the process fixedly support roller and body of heater to roll to fascinate, realize a continuous charging not destroying molten minute stove reducing atmosphere condition; The observation monitoring device in furnace lining and molten bath is set at body of heater, Fine design is carried out in the sealing at junction surface adopted the various structures such as water seal, sealing gland, guarantee in stove and weld pool surface maintenance strongly reducing atmosphere, reduction efficiency is high; To feed in raw material and exhaust smoke hole unites two into one and is arranged in same passage, reduce calorific loss, and utilize simultaneously the high-temperature flue gas can preheating metallized pellet and other furnace charges.
3) the utility model has adopted high-temperature flue gas and CO to reclaim comprehensive utilization technique, can utilize waste heat, and the recovery of CO can be as the reductive agent of metallized pellet reduction; Adopt Shui temper slag , Shui temper slag can fully utilize as the raw material of making cement.
Description of drawings
Fig. 1 is the System planes layout drawing.
Fig. 2 is system's facade layout drawing.
Fig. 3 is that high spud angle metal pelletizing heat is sent structure drawing of device.
Fig. 4 is insulation storage bin structure iron.
Fig. 5 is that horizontal metal pelletizing heat is sent structure drawing of device.
Fig. 6 is the molten minute reduction iron production furnace binding figure of electric coal method.
Fig. 7 is turndown platform structure figure.
Fig. 8 is for stirring the rifle structure iron.
Among the figure, 1-high spud angle metal pelletizing heat is sent device, and 2-is incubated storage bin; 3-horizontal metal pelletizing heat is sent device, the molten minute reduction iron production body of heater of 4-electricity coal method, 5-turndown platform; the 6-travelling belt, the 7-protective guard, 8-high spud angle metal pelletizing heat is sent the device drive unit; the 9-chain mat machine; the 10-nitrogen protection device, 11-discharging bin, 12-vibrating material feeding device; 13-weighing storehouse; the 14-weighing device, 15-horizontal metal pelletizing heat is sent the device drive unit, the 16-screw feeding device; 17-waste heat dedusting composite channel; the compound conveying cleaning shaft of 18-, 19-attemperator, the spherical end of 20-; 21-straight flange cylindrical shell; the 22-water cooled cover, 23-water-cooled solid matter coil pipe, 24-bell body; the upper central lid of 25-; the 26-cleaning shaft, 27-feeding chute, 28-lagging material; the 29-stationary installation; the 30-refrigerating unit, 31-support, 32-support roller; 33-turndown oil cylinder; the 34-horizontal support, the 35-Steel Bracket, 36-stirs rifle; the 37-switching valve; the 38-dedusting rotatable interface that feeds in raw material, 39-fills out husky mechanism, and 40-stirs the rifle drive unit; the 41-rifle of anti-the material, the 42-setting device.
Embodiment
Below in conjunction with embodiment the utility model is described in detail.
The molten minute reduction iron production electric furnace (Smelting Reduction Electric Ironmaking Furnace) of electric coal method of the present utility model is called for short the metallurgical equipment that the SREIF stove relates to a kind of non-blast furnace ironmaking, it is take heat (cold) metallized pellet (direct-reduced iron) or metal slag charge as starting material, take electricity, coal is as thermodynamics and reductive condition production high purity molten iron or produce highly purified vanadium, nickel, titanium slag equipment.The molten minute reduction iron production electric furnace of electric coal method SREIF-of the present utility model and rotary hearth furnace, shaft furnace, rotary kiln etc. are produced metallized pellet (direct-reduced iron) equipment duplex with coal-based (gas base), form modernized non-blast furnace ironmaking and produce new technological process.
Simultaneously the utility model also is applicable to use steel slag and iron slag, iron dust containing to be ironmaking (steel) technique of raw material.
The molten minute reduction iron production electric furnace of the utility model SREIF-provides a kind of novel non-blast furnace ironmaking equipment in order to solve the weak point in the above-mentioned background technology.Its technical characteristics is: both cast aside the molten form-separating of mineral hot furnace of common use resistor electric arc heating, adopted the electric arc open arc to add the arc melting principle that hot melt divides, but be different from conventional electric furnace arrangement for producing steel.Observing the aspect such as arranging of monitoring device with mode of movement, furnace lining and molten bath in the structure of the finished product of the furnace charge of melting, smelting, body of heater, the insulation storage of setting, furnace charge and reductive agent of stirring setting, exit flue and the charge cavity of rifle has original creation technology and tricks of the trade, and the molten minute reduction iron production electric furnace of SREIF-is that a kind of novel melting divides a reduction iron production electric furnace.
The molten minute reduction iron production system of electric coal method described in the utility model sequentially includes high spud angle metal pelletizing heat and send device 1, insulation storage bin 2, horizontal metal pelletizing heat to send device 3, electric coal method molten minute reduction iron production body of heater 4 and turndown platform 5.
High spud angle metal pelletizing heat send the transfer passage of device 1 to be the travelling belt 6 from the low level to a high position; travelling belt whole process arranges the protective guard 7 of sealing; the lower position place arranges drive unit 8 and chain mat machine 9, and higher position place arranges nitrogen protection device 10 supplying nitrogen in the transfer passage.The throughput of transport capacity and rotary hearth furnace is complementary, and leaves certain affluence amount, and VVVF control is adopted in the control of transfer rate.
Insulation storage bin 2 is provided with discharging bin 11, vibrating material feeding device 12 and weighing storehouse 13 from top to bottom, and vibrating material feeding device 12 lower ends are provided with refrigerating unit 30, are provided with weighing device 14 in the weighing storehouse 13.
Insulation storage bin 2 is supported by Steel Bracket 35.
It is the screw feeding device 16 with drive unit 15 that horizontal metal pelletizing heat is sent the core component of device 3, and screw feeding device 16 places waste heat dedusting composite channel 17, and screw feeding device 3 exits are provided with attemperator 19;
The lower end of waste heat dedusting composite channel 17 is also simultaneously as compound conveying cleaning shaft 18.
The bottom of the molten minute reduction iron production body of heater 4 of electricity coal method is the spherical end 20, and top, the spherical end is straight flange cylindrical shell 21, is stamped water cooled cover 22 on the straight flange cylindrical shell 21, integral sealing; The top of straight flange cylindrical shell 21 is provided with water-cooled solid matter coil pipe 23;
The pipe-type water-cooling structure that water cooled cover 22 is welded for the weldless steel tube solid matter is comprised of the upper central lid 25 on bell body 24 and bell body top, and upper central lid 25 tops are provided with cleaning shaft 26 and feeding chute 27;
Lower portion of furnace body is provided with the iron notch of the long grain of low level and the ash shoot of high-order short grain.
Be provided with in the molten minute reduction iron production body of heater 4 of electricity coal method and stir rifle 36, stir rifle (refractory materials Self comsuming) device can about, about, the forward-reverse motion.According to processing requirement, for reduction in molten minute provide the dynamic conditions of chemical reaction--melting bath stirring.By the stirring to the molten bath, the various chemical reactions such as reduction of FeO in the slag have been strengthened; By the stirring to the molten bath, can with the metal pelletizing evenly, concentrate the high-temperature zone that is distributed in electric arc, improved the thermo-efficiency of melting, avoid or reduced the soft layer that melts of metal pelletizing, do not make the molten bath form the bridging phenomenon; By the stirring to the molten bath, temperature that can uniform slag and the temperature of molten iron and strengthen the reaction of slag iron.Stir gun apparatus and can spray into carbon dust to slag blanket or molten iron by vector gas.According to processing requirement, carbon dust can provide direct-reduction and the needed reductive agent of indirect reduction (CO) for reduction (comprising the reduction of FeO in the slag) in molten minute as reductive agent; Can implement molten iron carburetting by spray into carbon dust to molten iron; The heat energy that the carbon dust burning produces also is a kind of supplementary energy.
Stir rifle and be installed on water cooled cover or the body of heater on the furnace shell water wall according to the quantity of arts demand, connect by flange.The perforate of passing on the water wall is goed deep into stirring in the stove.。
Molten minute reduction iron production body of heater 4 complete installations of electricity coal method are on turndown platform 5;
Turndown platform 5 is provided with two semicircular arc supports 31, and support 31 belows have been provided with support roller 32, and the bottom of support 31 1 sides is provided with turndown oil cylinder 33, and opposite side is provided with horizontal support 34.
Other devices:
(1) TV observes monitoring device
Functions of the equipments: the sidewall at body of heater is equipped with a plurality of TV observation monitoring devices, in order to realizing that state of the art in the SREIF stove of " sealing " (the flowing of the boiling of foamy slag, slag liquid, the distribution of pelletizing feed, the erosion of furnace lining etc.) whole process is carried out Real Time Monitoring, for the adjusting process operation provides in real time, dynamic foundation.
TV observes monitoring device by the TV long-focus camera (pin hole) that is installed on stroboscopic observation glass top, the compositions such as water-cooling protective sleeve and swinging strut, cleaning agency, gas protection mechanism.The camera head camera can rotate, and when camera leaves viewing window, can carry out artificial observation.
Be provided with multipoint temperature sensor in order to monitor the furnace lining situation at bottom of furnace body.
(2) SREIF furnace transformer and reactor
Functions of the equipments: for guaranteeing the production capacity requirement of SREIF stove, be that a molten minute reduction furnace (SREIF) provides optimized Power supply mode according to the different process stage.Guarantee that the electric energy of one of thermodynamic condition and melting and the transfer rate of metal pelletizing adapt, and adopt the electronic on-load voltage regulation furnace transformer of many gears secondary voltage.The power supply system of SREIF stove adopts high resistance, longer arc operation, and for realizing high resistance, longer arc operation, the SREIF furnace transformer is with reactor.
(3) the three-phase electrode lifting arc heating system of SREIF stove, large current short-network system, high-pressure system and SREIF is low-pressure electric controlled and the PLC automation control system, and hydraulic efficiency system, hand centralized lubricating device, with tap a blast furnace car and cable handler, water-cooling system, the pneumatic system of weighing, electrode is deposited and coupling unit etc., and is similar with electric furnace arrangement for producing steel.
Total technical process is: from rotary hearth furnace or shaft furnace; the metallized pellet of the usefulness gas base coal-based direct reduction device fabrications such as rotary kiln/direct-reduced iron DRI exit material feeding → send device 900~1000 ℃ of thermometal pelletizings to be transported to the insulation storage bin → weighing of SREIF stove with the high spud angle metal pelletizing heat that adopts the N2 protection; vibrations feed pelletizing; reductive agent; the continuous convey materials of slag charge → screw feeder enter the fusing of furnace high-temperature district → electric-arc heating simultaneously body of heater stir rifle spray carbon--agitation molten pool slag spray carbon reducing agent → thermometric sampling → manufacturability skims → electric-arc heating fusing → manufacturability skims → electric-arc heating fusing → thermometric probe temperature; composition is up to standard → skims before tapping a blast furnace; quantitatively tap a blast furnace and stay slag; stay iron.
Concrete steps are:
Step 1: high spud angle metal pelletizing heat send device from accepting the hot metal pellet with gas base exit, and under the non-oxidizing atmosphere condition hot metal pellet is delivered in the high-order insulation storage bin by low level, omnidistance sealing;
Step 2: after the insulation storage bin carries out weight weighing to the hot metal pellet, by vibrating material feeding device the hot metal pellet is sent into horizontal metal pelletizing heat and send device;
Step 3: the hot metal pellet send device to send in molten minute reduction iron production body of heater of electric coal method by horizontal metal pelletizing heat, the electric-arc heating fusing, during with stirring rifle spray carbon, agitation molten pool slag;
Step 4: in smelting process, skim to reduce the slag blanket height by repeatedly technological; Along with the continuous adding of metallized pellet and carrying out continuously of Coal powder spray, electrode enters slag blanket and carries out submerged arc, long arc melting heating according to the power input of smelting model specification, the oxidizing fire heating of simultaneous coal dust, stir by the winding-up of stirring rifle again and carry out the even of composition, temperature, raw material ball group heats up, melts the most at last, realizes the separation of slag, iron;
Step 5: during iron water amount value of making it in stove, the operation of will tapping a blast furnace for preventing the slag blanket anti-material of too high erosion upper of furnace body and equipment, need to be slagged tap before tapping a blast furnace, and generally slagging tap to staying the quantity of slag is 5%;
Step 6: the iron water amount that smelt to generate reaches the operation of slagging tap after the target value, slags tap to tap a blast furnace after finishing, and the molten iron of destination number is flowed into hot metal ladle by iron notch, leaves by overhead traveling crane or transport trolley, carries out next process engineering.
Electricity coal method SREIF stove main economic and technical indices sees the following form 1:
Table 1 main economic and technical indices
It is cited that content of the present utility model is not limited to embodiment, and the conversion of any equivalence that those of ordinary skills take technical solutions of the utility model by reading the utility model specification sheets is claim of the present utility model and contains.

Claims (8)

1. an electric coal method melts a minute reduction iron production system, it is characterized in that:
Sequentially including high spud angle metal pelletizing heat in the described system send device (1), insulation storage bin (2), horizontal metal pelletizing heat to send device (3), electric coal method molten minute reduction iron production body of heater (4) and turndown platform (5).
2. a kind of electric coal method according to claim 1 melts a minute reduction iron production system, it is characterized in that:
Described high spud angle metal pelletizing heat send the transfer passage of device (1) to be the travelling belt (6) from the low level to a high position; travelling belt whole process arranges the protective guard (7) of sealing; the lower position place arranges drive unit (8) and chain mat machine (9), and higher position place is provided with the nitrogen protection device (10) of supplying nitrogen in the transfer passage.
3. a kind of electric coal method according to claim 1 and 2 melts a minute reduction iron production system, it is characterized in that:
Described insulation storage bin (2) is provided with discharging bin (11), vibrating material feeding device (12) and weighing storehouse (13) from top to bottom, vibrating material feeding device (12) lower end is provided with refrigerating unit (30), is provided with weighing device (14) in weighing storehouse (13).
4. a kind of electric coal method according to claim 3 melts a minute reduction iron production system, it is characterized in that:
Described horizontal metal pelletizing heat send device (3) to be provided with to have drive unit the screw feeding device (16) of (15), screw feeding device (16) places waste heat dedusting composite channel (17), and screw feeding device (3) exit is provided with attemperator (19);
The lower end of waste heat dedusting composite channel (17) is also simultaneously as compound conveying cleaning shaft (18).
5. a kind of electric coal method according to claim 4 melts a minute reduction iron production system, it is characterized in that:
The bottom of the molten minute reduction iron production body of heater (4) of described electric coal method is the spherical end (20), and top, the spherical end is straight flange cylindrical shell (21), is stamped water cooled cover (22) on the straight flange cylindrical shell (21), integral sealing; The top of straight flange cylindrical shell (21) is provided with water-cooled solid matter coil pipe (23);
The pipe-type water-cooling structure that water cooled cover (22) is welded for the weldless steel tube solid matter is comprised of the upper central lid (25) on bell body (24) and bell body top, and upper central lid (25) top is provided with cleaning shaft (26) and feeding chute (27);
Lower portion of furnace body is provided with the iron notch of the long grain of low level and the ash shoot of high-order short grain.
6. a kind of electric coal method according to claim 5 melts a minute reduction iron production system, it is characterized in that:
Described insulation storage bin (2) is supported by Steel Bracket (35).
7. a kind of electric coal method according to claim 6 melts a minute reduction iron production system, it is characterized in that:
Be provided with in the molten minute reduction iron production body of heater (4) of described electric coal method and stir rifle (36).
8. a kind of electric coal method according to claim 7 melts a minute reduction iron production system, it is characterized in that:
Molten minute reduction iron production body of heater (4) complete installation of described electric coal method is on turndown platform (5);
Turndown platform (5) is provided with two semicircular arc supports (31), and support (31) below has been provided with support roller (32), and the bottom of support (31) one sides is provided with turndown oil cylinder (33), and opposite side is provided with horizontal support (34).
CN 201320123198 2013-03-19 2013-03-19 Melting reduction iron-making system employing electricity-coal method Active CN203200287U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103333979A (en) * 2013-03-19 2013-10-02 陈存运 Smelting reduction electric ironmaking system using electricity-coal method, and technological process thereof
CN103773913A (en) * 2014-01-22 2014-05-07 辽宁天汇管线材有限公司 Smelting furnace for smelting reduction

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103333979A (en) * 2013-03-19 2013-10-02 陈存运 Smelting reduction electric ironmaking system using electricity-coal method, and technological process thereof
CN103333979B (en) * 2013-03-19 2015-10-28 陈存运 Electricity coal method molten point reduction iron production system and technical process thereof
CN103773913A (en) * 2014-01-22 2014-05-07 辽宁天汇管线材有限公司 Smelting furnace for smelting reduction

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EE01 Entry into force of recordation of patent licensing contract

Assignee: Xi'an Taoyuan Metallurgy Equipment Engineering Co., Ltd.

Assignor: Chen Cunyun

Contract record no.: 2014610000066

Denomination of utility model: Melting reduction iron-making system employing electricity-coal method

Granted publication date: 20130918

License type: Exclusive License

Record date: 20140410

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