CN110699542A - Process method and device for upgrading and modifying sintered surface layer ore - Google Patents
Process method and device for upgrading and modifying sintered surface layer ore Download PDFInfo
- Publication number
- CN110699542A CN110699542A CN201911006939.8A CN201911006939A CN110699542A CN 110699542 A CN110699542 A CN 110699542A CN 201911006939 A CN201911006939 A CN 201911006939A CN 110699542 A CN110699542 A CN 110699542A
- Authority
- CN
- China
- Prior art keywords
- sintering
- microwave
- ore
- temperature
- surface layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A process method for improving the quality of a sintering surface layer ore by microwaves belongs to iron ore sintering production, and particularly relates to a microwave control method and a microwave control device for the temperature of the sintering surface layer ore. The upgrading modification method comprises the steps of preparing a sintering material, starting a sintering machine, distributing the material, igniting at high temperature, heating by microwave and screening the sintering ore; the quality-improving modification device comprises a belt sintering machine, a sintering machine trolley, a sintering material, an igniter, a sintering air box and a waste gas collecting main pipe, and is characterized in that an industrial microwave heating furnace is arranged behind the igniter, the microwave output frequency is 25MHz-2.45GHz, and the electromagnetic oscillation is 0.25-24.5 hundred million times per second, so that the surface layer sintering ore is subjected to quality improvement and modification. The method has the advantages that through microwave sintering, the return ore rate of sintering production is reduced to about 18 percent, and is reduced by 7-12 percent compared with the traditional process, the goal of quality improvement and modification of surface layer sintered ore is realized, and the processing cost of ton sintered ore is reduced; the production efficiency is improved.
Description
Technical Field
The invention belongs to a method and a device for iron ore sintering production process, and particularly relates to a method and a device for controlling the temperature of sintering surface ores by microwaves.
Background
The iron ore sintering process is characterized in that iron ore, flux and fuel are mixed according to a certain proportion to form a sintering material, the sintering material is arranged on an operating belt type sintering machine trolley, after high-temperature ignition, the sintering material starts to be sintered from top to bottom under the action of air draft, fine-particle sintering material is partially melted to generate liquid phase under the high-temperature condition, the liquid phase is crystallized and solidified into blocky sintering ore in the air draft sintering cooling process, the blocky sintering ore is crushed and cooled and then is screened, the screened sintering ore with the particle size larger than 5mm is used as a finished product sintering ore and is used as a main raw material for blast furnace smelting, the sintering ore with the particle size smaller than 5mm is an unqualified product, and the unqualified product is transported.
Now, the height of the material layer arranged on the sintering trolley is generally 700-930mm, and the sintering material is laid on the sintering trolley. After high-temperature ignition, the sintering material runs along with a sintering machine trolley and is sintered from top to bottom under the action of sintering air draft. The sintering temperature and time of the sintering materials at the upper part, the middle part and the lower part in the sintering process are different, so that the quality of the sintering ore has obvious difference. The sintering material presents five zones along the height direction of the material bed in the sintering process, the uppermost layer is a sintering ore zone, and the combustion zone, the preheating zone, the drying zone and the over-wet zone are sequentially arranged downwards.
Sintering the ore belt, starting from the sintering point, forming the sintered ore belt, gradually thickening the sintered ore belt, and completing the combustion of fuel at the temperature of below 1100 ℃ to complete FeO and Fe3O4And sulfide oxidation reaction, the generated liquid phase is cooled by pumped cold air, gradually crystallized and solidified, and latent heat of fusion is released, and the air passing through the material layer is heated by physical heat, reaction heat and latent heat of fusion of the sintering ore, so that the fuel at the lower part is promoted to continuously combust, and a combustion zone is formed. It provides about 40% of the total heat required by the combustion layer, theoretically, the fuel consumption can be reduced when the lower sintering material is sintered.
The combustion zone starts from the ignition of fuel (600- & ltSUB & gt- & gt 700 ℃), until the material layer reaches the highest temperature (1200- & ltSUB & gt 1400 ℃), and falls to about 1100 ℃, the thickness of the material layer is 20-50mm, the material layer moves downwards at the speed of 10-40mm per minute, during which the combustion of fuel, the decomposition of carbonate, the reduction of iron oxide, the oxidation, the thermal decomposition and the generation and the melting of low-melting-point minerals occur, and because the temperature of combustion products is high, liquid phase is generated, and the sintering resistance.
The thickness of the preheating zone is narrow, the temperature is in the range of 150-700 ℃, during which the fuel is heated to the ignition temperature, the combined water of the sintering material and part of carbonate and sulfide are gradually decomposed, part of magnetite can be subjected to oxidation reaction, and only the reaction between gas phase and solid phase or the reaction between solid phase and solid phase is carried out in the preheating zone, and no liquid phase is generated.
The drying zone is the next zone of the preheating zone, the heat of the combustion products of the zone evaporates the water of the sinter, at a temperature of about 70-150 ℃, and the granulated pellets may be destroyed.
The over-wet belt is formed by condensing cold sintering materials when the waste gas transferred from the drying belt contains a large amount of water vapor, and the condensed water amount is continuously increased along with the time extension, so that the air permeability of a material layer is deteriorated by the over-wet belt.
The sintering reaction is a complex process of physical and chemical reaction, mass transfer, heat transfer and crystallization, and in the sintering process: the heat is the driving force of the five zones which continuously change in the time-space two-dimensional direction, solid phase reaction occurs in a combustion zone and a preheating zone, a low-melting-point compound is generated and is a precursor for the generation of a sintering liquid phase, the sintering material is decomposed in the five zones, and reactions such as the reduction and oxidation of iron oxides, the decomposition of crystal water of limonite and the like all cause the sintering material to deteriorate and are accompanied with the generation of lattice defects. The new material consolidation in the space-time two-dimensional direction develops towards the direction of low free energy in the system, therefore, the sintered ore is a non-homogeneous product, and is generally divided into three parts, namely the sintered ore with the thickness of less than 150mm downwards along the surface of a material layer is taken as a surface layer sintered ore, the sintered ore with the thickness of 150-sand 500mm is taken as a middle part sintered ore, and the sintered ore with the thickness of 500-sand 930mm is taken as a lower part. The prior art has the defects that the solid-phase reaction time and temperature of the surface layer sintering material do not reach the condition of sintering the middle lower part, the solid-phase reaction is insufficient, the amount of generated liquid phase is small, the liquid-phase crystallization time is short, the quality of the surface layer sintering ore is obviously lower than that of the middle lower part sintering ore, the surface layer sintering ore is basically return ore, the internal return ore rate reaches 25-30%, the production efficiency is low, the return ore needs to be returned for re-sintering, and the processing cost of the sintering ore is increased. Therefore, the exploration of the quality improvement and modification process technology for the sintering surface layer ore is of great significance and is a new direction for improving the traditional sintering production.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a process method and a device for quality improvement and modification of surface layer sintered ores, which change the thermal system of surface layer ore sintering by utilizing the characteristic of microwave heating, improve the quality of the surface layer sintered ores, reduce return ores, save energy, reduce consumption and reduce production cost.
A method for improving quality and modifying sintered surface ores comprises the following steps:
1. preparing iron ore powder, flux (limestone, dolomite and quicklime) and fuel (coal powder or coke powder) by the sintering material according to a set proportion, uniformly mixing, adding water for wetting and granulating;
2. starting the sintering machine of the sintering machine with the effective length of 75-100m and the outer side width of 4-8m, and controlling the running speed of a sintering machine trolley at 0.6-3.8 m/min;
3. distributing the prepared sintering material on a trolley of an operating sintering machine, wherein the distributing height of the sintering material is controlled to be 700-950 mm;
4. the high-temperature ignition trolley runs to the position below the igniter to ignite the sintering material on the trolley, and the temperature is controlled at 850-; the ignited sintering material moves forwards along with the trolley, the ignited sintering material is under the action of an exhaust fan, the sintered flue gas is gathered to a waste gas collecting main pipe through a sintering air box and discharged outwards, and the sintering material on the trolley is in the atmosphere; the air draft negative pressure of the air box is controlled to be 12.0-17.5kpa according to the air permeability change condition in the sintering process; when the ore is discharged from an igniter, the temperature of 0-150mm surface layer ore is 60-120 ℃;
5. in order to solve the problem of the surface layer mineral content of the sintering material by microwave heating, an industrial microwave heating furnace is arranged right above the outlet of an igniter, the width of the industrial microwave heating furnace is matched with the width of the outer side of a sintering machine, the length of the industrial microwave heating furnace is 10-35m, and the distance between the industrial microwave heating furnace and the sintering material is 100-400 mm; the microwave output frequency is 25MHz-2.45GHz, and the electromagnetic oscillation is 0.25-24.5 hundred million times per second; according to a set heating time-temperature control curve, the automatic control system automatically controls the surface layer sinter:
controlling a temperature rising section: the temperature is increased from 60 ℃ to 600 ℃ at a constant speed for 0-0.86 min; 0.86-1.55min, raising the temperature from 600 ℃ to 1100 ℃ at a constant speed; 1.55-5.1min, raising the temperature from 1100 deg.C to 1390 deg.C at uniform speed;
and (3) cooling section control: 5.1-7.6min, and uniformly reducing the temperature from 1390 ℃ to 1080 ℃; 7.6-10.6min, and uniformly reducing the temperature from 1080 ℃ to 520 ℃; the temperature is reduced from 520 ℃ to 130 ℃ at constant speed for 10.6-12.87 min. The temperature control of an industrial microwave heating furnace makes up the full solid-phase reaction of the surface sinter and prolongs the crystallization reaction time.
After the sintering material is discharged from a hearth of an igniter, the sintering material enters an industrial microwave heating furnace, microwaves generated by a microwave source system directly penetrate into the sintering material with the depth of 280mm-320mm, dipole molecule high-frequency reciprocating friction motion in the surface sintering material is promoted to generate heat, the internal and external diffusion speed of particles of the sintering material is accelerated, and the solid phase reaction of the sintering material is stimulated; simultaneously heating the honeycomb ceramic to 200-1400 ℃, exchanging heat of air through the honeycomb ceramic, and introducing the heated air into a sintering material bed under the air draft effect to further promote the complete combustion of fuel within 300mm below the surface layer of the sintering material to release heat and keep the temperature of the surface layer of the sintering material at 200-1400 ℃; the temperature and time concrete parameters of the industrial microwave heating furnace acting on the sintering surface layer ore are controlled by an automatic control system. Under the combined action of hot air and microwaves, the solid-phase reaction of the surface layer sinter is automatically controlled to be full, the liquid phase generation and crystallization time is prolonged, the working condition which is consistent with or close to that of the middle sinter is achieved, and the quality of the surface layer sinter is improved;
6. under the action of sintering air draft, the iron ore which is sieved and melted by the sinter is crystallized and condensed into sinter, and then the sinter is sieved, so that the yield of the blocky sinter with the particle size of more than 5mm is improved, and the return rate of the blocky sinter with the particle size of less than 5mm is reduced.
A device for improving quality and modifying a sintering surface layer ore comprises a belt sintering machine, a sintering machine trolley, a sintering material, an igniter, a sintering air box and a waste gas collecting main pipe, and is characterized in that an industrial microwave heating furnace is arranged behind the igniter, is in a groove shape, has the length of 10-35m, at least covers more than ten trolleys, has the width of a hearth which is equivalent to the width of the sintering machine and is 4.5-8.5m, has the distance of 100 plus materials and 400mm between the hearth and the surface of the sintering material, and heats the sintering material by using microwaves with the output frequency of 25MHz-2.45GHz and electromagnetic oscillation of 0.25-24.5 million times/second generated by the industrial microwave heating furnace, so that the technical defects of solid-phase reaction, liquid-phase generation and short liquid-phase crystallization time of the surface layer sintering ore are overcome, and the.
The industrial microwave heating furnace is further improved, and consists of a microwave source, a microwave cover, a rack platform, honeycomb ceramics, a microwave shielding device, a control device, a circulating cooling water system and the like, wherein the microwave source is distributed on two side surfaces and the top of the microwave cover; the honeycomb ceramics are distributed in the refractory hearth of the microwave hood; an outer insulating layer is arranged outside the microwave hood, and microwave shielding devices are arranged on the contact surfaces of the microwave hood and the sintering machine, so that the microwave is prevented from leaking; the air inlets are distributed at the top of the microwave hood, and air enters from the top of the microwave hood and uniformly enters the surface of the sintering material bed after being heated by the high-temperature honeycomb ceramic, so that the quality of sintering surface ores is changed.
Further improvement, the industrial microwave heating furnace equipment and parameter setting are as follows:
microwave hood (length x width x height) 10-35m x 4.5-8.5m x 3.0-5.0m
Compared with the prior art, the method has the advantages that by the microwave sintering technology, the solid phase reaction time of the surface layer sintering material is increased by 0.5-1.27min compared with the middle sintering material, the amount of the solid phase reaction product is increased by 22.5-35.8%, the solid phase reaction product capable of producing the liquid phase is increased by 16-28%, the surface layer liquid phase generation time is increased by 0.6-1.89min compared with the middle part, the liquid phase generation amount is increased by 18-26%, the condensation speed is reduced by 20-32 ℃/min compared with the middle part, the ore return rate of sintering production is reduced to about 18%, and is reduced by 7-12% compared with the traditional process, so that the aim of improving the quality and modifying the current surface layer sintering ore is achieved, and the processing cost of the; the production efficiency is improved.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a process equipment configuration for upgrading and modifying sintered surface layer ores.
FIG. 2 is a schematic diagram of an industrial microwave oven.
Fig. 3 is a side view of fig. 2.
Fig. 4 is a top view of fig. 2.
FIG. 5 is a time-temperature control curve of the surface layer ore of the microwave sintering technique.
FIG. 6 is a time-temperature control curve of the surface layer ore of the conventional sintering process.
In the figure:
1. a strand sintering machine 2, a sintering machine trolley 3, a sintering material 4, an igniter 5, an industrial microwave heating furnace 6, a sintering air box 7, a waste gas collecting main pipe 8, a microwave source system 9, a microwave cover 10, honeycomb ceramics 11, a microwave shielding device 12, a rack platform 13, an air inlet
Detailed Description
A method for improving quality and modifying sintered surface layer ores by microwaves comprises the following steps:
1. preparing iron ore powder, flux (limestone, dolomite and quicklime) and fuel (coal powder or coke powder) by the sintering material according to a set proportion, uniformly mixing, adding water for wetting and granulating;
2. starting the sintering machine of the sintering machine with the effective length of 75-100m and the outer side width of 4-8m, and controlling the running speed of a sintering machine trolley at 2.0 m/min;
3. distributing prepared sintering materials on a trolley of an operating sintering machine, wherein the distributing height of the sintering materials is controlled to be 830 mm;
4. the high-temperature ignition trolley runs to the position below an igniter to ignite the sintering material on the trolley, and the temperature is controlled at 1050 ℃; the ignited sintering material moves forwards along with the trolley, the ignited sintering material is under the action of an exhaust fan, the sintered flue gas is gathered to a waste gas collecting main pipe through a sintering air box and discharged outwards, and the sintering material on the trolley is in the atmosphere; the air draft negative pressure of the air box is controlled at 15.5kpa according to the air permeability change condition in the sintering process; when the ore is discharged from an igniter, the temperature of 0-150mm surface layer ore is 95 ℃;
5. in order to solve the problem of the surface layer mineral content of the sintering material by microwave heating, an industrial microwave heating furnace is arranged right above the outlet of an igniter, the width of the industrial microwave heating furnace is matched with the width of a sintering machine, the length of the industrial microwave heating furnace is 10-35m, and the distance between the industrial microwave heating furnace and the sintering material is 100-400 mm; the microwave output frequency is 25MHz-2.45GHz, and the electromagnetic oscillation is 0.25-24.5 hundred million times/second microwave; the surface layer sinter ore is automatically controlled by an automatic control system according to a heating time-temperature control curve set by the figure 5:
controlling a temperature rising section: the temperature is increased from 60 ℃ to 600 ℃ at a constant speed for 0-0.86 min; 0.86-1.55min, raising the temperature from 600 ℃ to 1100 ℃ at a constant speed; 1.55-5.1min, raising the temperature from 1100 deg.C to 1390 deg.C at uniform speed;
and (3) cooling section control: 5.1-7.6min, and uniformly reducing the temperature from 1390 ℃ to 1080 ℃; 7.6-10.6min, and uniformly reducing the temperature from 1080 ℃ to 520 ℃; the temperature is reduced from 520 ℃ to 130 ℃ at constant speed for 10.6-12.87 min. The temperature control of the industrial microwave heating furnace compensates the solid phase reaction of the surface layer sinter and prolongs the crystallization reaction time.
After the sintering material is discharged from a hearth of an igniter, the sintering material enters an industrial microwave heating furnace, microwaves generated by a microwave source system directly penetrate into the sintering material with the depth of 280mm-320mm to promote dipole molecules inside the sintering material on the surface layer to perform high-frequency reciprocating friction motion to generate heat, the internal and external diffusion speeds of particles of the sintering material are accelerated, and the solid-phase reaction of the sintering material is stimulated; simultaneously heating the honeycomb ceramic to 200-1400 ℃, exchanging heat of air through the honeycomb ceramic, and introducing the heated air into a sintering material bed under the air draft effect to further promote the complete combustion of fuel within 300mm below the surface layer of the sintering material to release heat and keep the temperature of the surface layer of the sintering material at 200-1400 ℃; the temperature and time concrete parameters of the industrial microwave heating furnace acting on the sintering surface layer ore are controlled by an automatic control system. Under the combined action of hot air and microwave, the solid-phase reaction of the surface layer sinter is automatically controlled to be full, the liquid phase generation and crystallization time is prolonged, the working condition which is consistent with or close to that of the middle sinter is achieved, and the quality of the surface layer sinter is improved.
6. Under the action of sintering air draft, the iron ore which is sieved and melted by the sinter is crystallized and condensed into sinter, and then the sinter is sieved, so that the yield of the blocky sinter with the particle size of more than 5mm is improved, and the return rate of the blocky sinter with the particle size of less than 5mm is reduced.
As can be seen from figure 1, the device for improving the quality of the surface sintering ore by microwaves comprises a belt type sintering machine 1, a sintering machine trolley 2, a sintering material 3, an igniter 4, a sintering air box 6 and a waste gas collecting main pipe 7, and is characterized in that an industrial microwave heating furnace 5 is arranged behind the igniter, is in a groove shape, has the length of 25m, at least covers more than ten trolleys, has the width of a hearth which is equal to the width of the sintering machine and is 6.5m, the distance between the hearth and the surface of the sintering material is 200mm, the output frequency of the industrial microwave heating furnace is 25MHz-2.45GHz, electromagnetic oscillation is 0.25-24.5 times/second microwaves, the sintering material is heated, the process defects of solid-phase reaction, liquid-phase generation and short liquid-phase crystallization time of the surface sintering ore are overcome, and the purpose of improving the quality of the surface.
As can be seen from fig. 1, 2, 3 and 4, the industrial microwave heating furnace is composed of a microwave source 8, a microwave hood 9, honeycomb ceramics 10, a microwave shielding device 11, a rack platform 12, a control device (not labeled in the figure), a circulating cooling water system (not labeled in the figure) and the like, wherein the microwaves are distributed on two sides and the top of the microwave hood; the honeycomb ceramics are distributed in the refractory hearth of the microwave hood; an outer insulating layer is arranged outside the microwave hood, and microwave shielding devices are arranged on the contact surfaces of the microwave hood and the sintering machine, so that the microwave is prevented from leaking; the air inlets 13 are distributed at the top of the microwave hood, and air enters from the top of the microwave hood, is heated by the high-temperature honeycomb ceramics and then uniformly enters the surface of the sintering material bed, so that the quality of sintering surface ores is changed.
As can be seen from fig. 5 and 6, the microwave heating prolongs the heating time of the surface layer ore of the sintering material, and when the heating time reaches 5min, the temperature of the surface layer ore is uniformly increased to nearly 1400 ℃, while the heating time of the surface layer ore of the traditional sintering process is short, and when the heating time reaches 3min, the temperature of the surface layer ore reaches the highest temperature, which is only 1200 ℃.
Setting industrial microwave heating furnace equipment and parameters:
the microwave shield (length × width × height) is 25m × 7.0m × 4.0 m.
Claims (4)
1. A method for improving quality and modifying sintered surface layer ores by microwaves is characterized by comprising the following steps:
(1) preparing iron ore powder, flux (limestone dolomite and quicklime) and fuel (coal powder or coke powder) from the sintering material according to a set proportion, uniformly mixing, adding water for wetting and granulating;
(2) starting the sintering machine of the sintering machine, wherein the effective length of the sintering machine is 75-100m, the width of the outer side of the sintering machine is 4-8m, and the running speed of a sintering machine trolley is controlled to be 0.6-3.8 m/min;
(3) distributing the prepared sintering material (3) on a trolley (2) of the operating sintering machine, wherein the distributing height of the sintering material is controlled to be 700-950 mm;
(4) the high-temperature ignition trolley runs to the position below the igniter (4) to ignite the sintering material on the trolley, and the temperature is controlled at 850-; the ignited sintering material moves forwards along with the trolley, the ignited sintering material is under the action of an exhaust fan, the sintered flue gas is gathered to a waste gas collecting main pipe through a sintering air box and discharged outwards, and the sintering material on the trolley is in the atmosphere; the air draft negative pressure of the air box is controlled to be 12.0-17.5kpa according to the air permeability change condition in the sintering process; when the ore is discharged from an igniter, the temperature of 0-150mm surface layer ore is 60-120 ℃;
(5) an industrial microwave heating furnace (5) is arranged right above the outlet of the igniter, the width of the industrial microwave heating furnace is matched with the width of the outer side of the sintering machine, the length of the industrial microwave heating furnace is 10-35m, and the distance between the industrial microwave heating furnace and the sintering material is 100-400 mm; the microwave output frequency is 25MHz-2.45GHz, and the electromagnetic oscillation is 0.25-24.5 hundred million times/second microwave; the heating is automatically controlled by an automatic control system according to a set time-temperature control curve:
controlling a temperature rising section: the temperature is increased from 60 ℃ to 600 ℃ at a constant speed for 0-0.86 min; 0.86-1.55min, raising the temperature from 600 ℃ to 1100 ℃ at a constant speed; 1.55-5.1min, raising the temperature from 1100 deg.C to 1390 deg.C at uniform speed;
and (3) cooling section control: 5.1-7.6min, and uniformly reducing the temperature from 1390 ℃ to 1080 ℃; 7.6-10.6min, and uniformly reducing the temperature from 1080 ℃ to 520 ℃; cooling from 520 deg.C to 130 deg.C at constant speed for 10.6-12.87 min;
(6) and crystallizing and condensing the sintered ore screened and melted iron ore into sintered ore under the action of sintering air suction, and then screening, so that the yield of the blocky sintered ore with the particle size of more than 5mm is improved, and the return rate of the blocky sintered ore with the particle size of less than 5mm is reduced.
2. A device for improving and modifying sintering surface layer ore by microwaves comprises a belt type sintering machine (1), a sintering machine trolley (2), a sintering material (3), an igniter (4), a sintering air box (6) and a waste gas collecting main pipe (7), and is characterized in that an industrial microwave heating furnace (5) is arranged behind the igniter, is groove-shaped, has the length of 10-25m, at least covers more than ten trolleys, has the width of a hearth which is 4.5-8.5m and is equivalent to the width of the sintering machine, has the distance of 100 plus one 400mm between the hearth and the sintering material surface, generates the output frequency of 25MHz-2.45GHz and electromagnetic oscillation of 0.25-24.5 hundred million times per second of microwaves, and heats the sintering material.
3. The microwave upgrading and modifying device for the sinter surface layer ore according to claim 1, wherein the industrial microwave heating furnace comprises a microwave source (8), a microwave hood (9), honeycomb ceramics (10), a microwave shielding device (11), a rack platform (12), a control device, a circulating cooling water system and the like, wherein the microwaves are distributed on two sides and the top of the microwave hood; the honeycomb ceramics are distributed in the refractory hearth of the microwave hood; an outer insulating layer is arranged outside the microwave hood, and microwave shielding devices are arranged on the contact surfaces of the microwave hood and the sintering machine, so that the microwave is prevented from leaking; the air inlets (13) are distributed at the top of the microwave hood, and air enters from the top of the microwave hood, is heated by the high-temperature honeycomb ceramics and then uniformly enters the surface of the sintering material bed.
4. The apparatus of claim 1, wherein the industrial microwave heating furnace comprises:
the microwave cover (length multiplied by width multiplied by height) is 10-35m multiplied by 4.5-8.5m multiplied by 3.0-5.0 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006939.8A CN110699542A (en) | 2019-10-22 | 2019-10-22 | Process method and device for upgrading and modifying sintered surface layer ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911006939.8A CN110699542A (en) | 2019-10-22 | 2019-10-22 | Process method and device for upgrading and modifying sintered surface layer ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110699542A true CN110699542A (en) | 2020-01-17 |
Family
ID=69202025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911006939.8A Withdrawn CN110699542A (en) | 2019-10-22 | 2019-10-22 | Process method and device for upgrading and modifying sintered surface layer ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110699542A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826519A (en) * | 2020-08-07 | 2020-10-27 | 于卓然 | Multi-vertical-seam sintering material distribution method and system |
| CN112393612A (en) * | 2020-04-27 | 2021-02-23 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
| CN113532136A (en) * | 2021-06-29 | 2021-10-22 | 鞍钢股份有限公司 | Method for reasonably distributing air volume of sintering trolley air box |
| EP4237588A4 (en) * | 2020-11-24 | 2024-10-16 | Tech Resources Pty Ltd | Biomass direct reduced iron |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11106837A (en) * | 1997-10-03 | 1999-04-20 | Nippon Steel Corp | Production of sintered ore |
| JP2006104567A (en) * | 2004-10-08 | 2006-04-20 | Sumitomo Metal Ind Ltd | Method for manufacturing sintered ore |
| CN103320605A (en) * | 2013-06-25 | 2013-09-25 | 攀钢集团攀枝花钢钒有限公司 | Sintering method and sintering equipment of iron ore |
| CN204987874U (en) * | 2015-07-17 | 2016-01-20 | 中冶长天国际工程有限责任公司 | Microwave oven system for sintering ignition furnace |
| CN107208977A (en) * | 2015-10-05 | 2017-09-26 | 株式会社Posco | Sintered ore manufacturing equipment and manufacture method |
| CN107304460A (en) * | 2016-04-19 | 2017-10-31 | 中冶长天国际工程有限责任公司 | A kind of iron ore prereduction sintering method and its device |
| CN108085483A (en) * | 2017-12-15 | 2018-05-29 | 湖南景远微波科技有限公司 | A kind of oxygen-enriched microwave igniter of step heat supply |
| WO2019174241A1 (en) * | 2018-03-14 | 2019-09-19 | 宝山钢铁股份有限公司 | Microwave sintering method for iron ore |
-
2019
- 2019-10-22 CN CN201911006939.8A patent/CN110699542A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11106837A (en) * | 1997-10-03 | 1999-04-20 | Nippon Steel Corp | Production of sintered ore |
| JP2006104567A (en) * | 2004-10-08 | 2006-04-20 | Sumitomo Metal Ind Ltd | Method for manufacturing sintered ore |
| CN103320605A (en) * | 2013-06-25 | 2013-09-25 | 攀钢集团攀枝花钢钒有限公司 | Sintering method and sintering equipment of iron ore |
| CN204987874U (en) * | 2015-07-17 | 2016-01-20 | 中冶长天国际工程有限责任公司 | Microwave oven system for sintering ignition furnace |
| CN107208977A (en) * | 2015-10-05 | 2017-09-26 | 株式会社Posco | Sintered ore manufacturing equipment and manufacture method |
| CN107304460A (en) * | 2016-04-19 | 2017-10-31 | 中冶长天国际工程有限责任公司 | A kind of iron ore prereduction sintering method and its device |
| CN108085483A (en) * | 2017-12-15 | 2018-05-29 | 湖南景远微波科技有限公司 | A kind of oxygen-enriched microwave igniter of step heat supply |
| WO2019174241A1 (en) * | 2018-03-14 | 2019-09-19 | 宝山钢铁股份有限公司 | Microwave sintering method for iron ore |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112393612A (en) * | 2020-04-27 | 2021-02-23 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
| CN112393612B (en) * | 2020-04-27 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Reinforced sintering equipment, charge level cooling device and control method thereof |
| CN111826519A (en) * | 2020-08-07 | 2020-10-27 | 于卓然 | Multi-vertical-seam sintering material distribution method and system |
| EP4237588A4 (en) * | 2020-11-24 | 2024-10-16 | Tech Resources Pty Ltd | Biomass direct reduced iron |
| CN113532136A (en) * | 2021-06-29 | 2021-10-22 | 鞍钢股份有限公司 | Method for reasonably distributing air volume of sintering trolley air box |
| CN113532136B (en) * | 2021-06-29 | 2022-08-16 | 鞍钢股份有限公司 | Method for reasonably distributing air volume of sintering trolley air box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110699542A (en) | Process method and device for upgrading and modifying sintered surface layer ore | |
| CN101548024B (en) | Microwave heating method and apparatus for iron oxide reduction | |
| CN102747220B (en) | Metalized pellet sintering roasting agglomeration apparatus for dust containing zinc and iron | |
| CN108083658B (en) | Induction heating device and method for producing light-burned magnesium oxide by using same | |
| WO2010023691A1 (en) | Method for separation of zinc and extraction of iron values from iron ores with high concentration of zinc | |
| WO2013011521A1 (en) | A method for direct reduction of oxidized chromite ore fines composite agglomerates in a tunnel kiln using carbonaceous reductant for production of reduced chromite product/ agglomerates applicable in ferrochrome or charge chrome production. | |
| JPH11172312A (en) | Operation of movable hearth type furnace and movable hearth type furnace | |
| CN104745757B (en) | A kind of microwave fuel combined heat formula coal-based direct reduction method and rotary hearth furnace | |
| CN104152620A (en) | Method and equipment for iron ore powder direct reduction | |
| JP3732136B2 (en) | Method for producing reduced iron and cooling apparatus for reduced iron | |
| RU2655423C1 (en) | Rotary hearth furnace | |
| JPH11241125A (en) | Production of reduced iron pellet and reduced iron pellet produced by this method | |
| CN101392331B (en) | Smelting technique for processing nickel ore by rotary kiln | |
| CN114737050A (en) | Production process of pellet roasted at low temperature by microwave and without carbon | |
| CN106282468B (en) | A kind of reduction reaction system and method for fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group | |
| US20230407423A1 (en) | Biomass direct reduced iron | |
| CN109052997A (en) | Fixed bed-fluidized bed multithread state preparation high activity light calcined magnesia method | |
| RU2489493C2 (en) | Metal coating method of iron-bearing ore-coal raw material | |
| CN104178593B (en) | Iron Ore Powder direct reduction process and equipment | |
| CN112831652A (en) | Carbon-free sintering system adopting high air temperature to provide heat | |
| CN202347064U (en) | Shaft furnace type oxidization and sodium treatment roasting device | |
| CN101429593B (en) | Dezincification process for zinc-containing mash gas mud | |
| CN106191464B (en) | A kind of pyrolysis of lateritic nickel ore dry bulb group and reduction reaction system and method | |
| JP2000017343A (en) | Two-stage ignition type production of sintered ore | |
| CN106222447B (en) | A kind of pyrolysis of fume afterheat furnace interior recycling type lateritic nickel ore dry bulb group and reduction reaction system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200117 |