CN103290161A - Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste - Google Patents
Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste Download PDFInfo
- Publication number
- CN103290161A CN103290161A CN2013101893254A CN201310189325A CN103290161A CN 103290161 A CN103290161 A CN 103290161A CN 2013101893254 A CN2013101893254 A CN 2013101893254A CN 201310189325 A CN201310189325 A CN 201310189325A CN 103290161 A CN103290161 A CN 103290161A
- Authority
- CN
- China
- Prior art keywords
- iron
- ore
- rotary kiln
- complex
- containing waste
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of metallurgy, and particularly relates to equipment and method for carrying out slag-iron separation and iron reduction on refractory ores, complex ores and chemical industry ferruginous wastes. The equipment is provided with secondary combustion chamber between a chain grate and a rotary kiln; the top of the secondary combustion chamber is provided with an air pipeline and connected with the top of the chain grate through the air pipeline; and the bottom of the chain grate is connected with a heat recuperation fan to form a flue gas loop and is provided with a pea coal spray gun and a powdered coal spray gun on the outlet of head of the rotary kiln. The method disclosed by the invention can be used for carrying out the reduction and slag-iron separation in the rotary kiln in a pelletizing way by crushing the refractory ores, the complex ores and the ferruginous wastes. The method disclosed by the invention can be used for directly applying the low-poor refractory ores with the grade of 35%-55%, the complex ores and the ferruginous wastes, directly reducing the low-poor refractory ores with the grade of 35%-55%, the complex ores and the ferruginous wastes and then separating a high-quality reduced iron product which has the grade more than 90% and is a high-quality furnace material for substituting scrap steel, realizes the resource of the low-poor refractory ores, lays a firm foundation for the reproducibility of resources, lays a foundation for the development of short-process steel making and saves the energy resources from another aspect.
Description
Technical field
The invention belongs to metallurgical technology field, particularly a kind of difficult ore dressing, complex ore and iron-containing waste slag iron separate the Apparatus and method for of reduced iron.
Background technology
China is the big output of steel of the first in the world state, and output of steel was broken through 700,000,000 tons in 2012, more than 9,000 ten thousand tons of year generation steel scraps, and the reduced iron demand is 5,000,000 tons, China is annual to need 3,000,000 tons of import reduced irons, and reduced iron (sponge iron) annual production only is 600,000 tons.China is the abundant country of a poor iron ore deposit, low poor slow-witted ore deposit accounts for iron ore deposit more than 97%, but every year need be from the iron ore of 600,000,000 tons of external imports, domestic a large amount of low poor slow-witted ore deposit is not well developed, in addition, China also has more than one hundred million tons iron-containing wastes such as sulfate slag, copper ashes, dedusting ash, alumina laterite to produce every year.Now, China is the abundant countries of mill coal reserves, coking coal resource is poor day by day, therefore country puts into effect relevant policies, encourage growth direct-reduced iron and the technological development of Fei Jiao iron-smelting process and application, therefore, a large amount of low poor slow-witted ore deposit of the output of raising reduced iron and exploitation China makes its resource utilization extremely urgent.
600,000 tons of reduced irons (sponge iron) that China year produces are at present mainly produced by a tunnel furnace method surplus 200.In China, coal-based tunnel furnace pot type method is produced the history that reduced iron (sponge iron) was passed by 30 years, and its Technology is more stable, ripe, and small project distributes relatively general.But because of traditional coal-based tunnel furnace pot type method, must adopt expensive fire-resistant can; Have simultaneously that energy consumption height, recovery time are long, the labor force consumes height and the low inferior shortcoming of quality product, cause practical problemss such as production cost height, slack market, finally cause the production standstill state of present coal-based tunnel furnace method reduced iron.
The present tunnel furnace method of China, kiln process are produced the reduced iron product, must adopt grade in the high-quality powdered iron ore more than 66%, and can't directly use grade at 35%～55% low poor slow-witted ore deposit, complex ore and iron-containing waste, have caused the serious waste of resource.
Summary of the invention
Problem at the prior art existence, the invention provides the Apparatus and method for that a kind of difficult ore dressing, complex ore and iron-containing waste slag iron separate reduced iron, purpose is by a kind of novel power-saving kiln furnace apparatus is provided, obtain high-grade metal iron, for steel-making provides the high-quality that can substitute steel scrap furnace charge, make low poor slow-witted ore deposit and useless admittedly resource utilization, save energy is enhanced productivity simultaneously.
A kind of difficult ore dressing, complex ore and iron-containing waste slag iron separate the equipment of reduced iron, comprise pelletizing material distributing machine, drying grate, backheat blower fan, fine powder storehouse, rotary kiln, stream sieve and secondary combustion chamber; Be provided with balling disk (-sc) in pelletizing material distributing machine the place ahead, described pelletizing material distributing machine is to transport the belt of pelletizing, with the drying grate one, is provided with the fine powder storehouse between drying grate and rotary kiln; Described stream sieve is arranged in the fine powder storehouse, and an end links to each other with pelletizing material distributing machine tail end, and the other end links to each other with the rotary kiln tail end; Described secondary combustion chamber is arranged between drying grate and the rotary kiln, and the top of secondary combustion chamber is provided with gas pipeline, and links to each other with the drying grate top by gas pipeline, and the bottom of drying grate is connected with the backheat blower fan, forms the flue gas loop; The equidistant overfire air fan that is furnished with on the kiln body case of described rotary kiln, the kiln hood exit is equipped with beans spray gun and fine coal spray gun; Behind rotary kiln, be disposed with water quenching pool, wet-type ball mill, wet magnetic separation unit and the high-strength unit of colding pressing, wherein be provided with chain mat machine between water quenching pool and the wet-type ball mill.
Described beans lance ejection granularity is the reduction beans of 5～25mm, and spray gun adopts spray wind mode of movement to spray, blast 65～75KPa, and jet length is 38～42m.
Described fine coal lance ejection granularity is the burning fine coal of 0.075～0.096mm.
The air port of described overfire air fan is connected with pipeline towards kiln hood, and pipeline inserts in the rotary kiln, and at every pipeline valve is installed.
The technical scheme of realization the object of the invention is carried out according to following steps:
(1) with difficult ore dressing, complex ore or iron-containing waste fragmentation, be polished into-200 order particles and account for the breeze of massfraction more than 85%, with addition of the auxiliary agent of powdered ore quality 6.0～10.0% and 0.4～2.0% binding agent, carry out even mixed grind, water spray is made ball, obtain the pelletizing of diameter ￠ 8.0mm～￠ 16mm, pelletizing sent into carry out cloth and sintering in the drying grate, the backheat blower fan carries out to hot blast, in 1050 ~ 1180 ℃ of sintering 20～40min, make the agglomerates of sintered pellets that intensity is 300 ~ 400N/ ball, agglomerates of sintered pellets enters rotary kiln by airtight stream sieve, and the stream sieve sieves out granularity 5mm following fine powder and small-particle, discharges by bottom, fine powder storehouse;
(2) agglomerates of sintered pellets enters in the rotary kiln in confined conditions, adopt the beans spray gun to spray into the reduction beans that granularity is 5 ~ 25mm, agglomerates of sintered pellets is reductase 12～4h under the condition of 1050 ~ 1100 ℃ of temperature, and reduction ratio reaches more than 93%, the metallized pellet after obtaining reducing;
The fine coal lance ejection granularity of rotary kiln outlet is the burning fine coal of 0.075～0.096mm, metallized pellet is in 1100 ~ 1320 ℃ of insulation 1.5～2h, the slag iron that enters the high temperature iron grain growth separates the reduction zone, and the metallic iron crystal grain-growth is to 100 μ m～3mm, and metallic iron and gangue are assembled respectively;
(3) metallic iron of assembling respectively and gangue enter the water quenching pool cooling from the rotary kiln outlet, enter wet-type ball mill by chain mat machine after being smashed the balling-up piece by current, the ball piece is polished into-0.075mm accounts for the powder more than 85%, enter the wet magnetic separation unit again, isolate gangue and metal iron powder, the metal iron powder grade that obtains is more than 90%, degree of metalization more than 93%, the rate of recovery is more than 93%;
Metal iron powder obtains density at 4.0t/m after high-strength cold-pressing balls machine is colded pressing
3More than, granularity is the metallic iron cold pressing block product of 20～45mm.
Described difficult ore dressing is oolitic hematite, antelope stone iron ore, rhombohedral iron ore, limonite or spathic iron ore; Described complex ore is red soil nickel ore, paigeite or ferrous manganese ore; Described iron-containing waste is sulfate slag, alumina laterite, ferrochrome slag or dedusting ash (mud).
Described auxiliary agent is calcium oxide, calcium carbonate, Calcium Fluoride (Fluorspan) mixture; Binding agent is commercial high polymer binder, and main component is Xylo-Mucine or Sodium salts humic acids.
Compared with prior art, characteristics of the present invention and beneficial effect are:
(1) in the equipment of production reduced iron of the present invention, the flue gas between drying grate and the rotary kiln disconnects, and the rotary kiln flue gas is rich in CO and H
2Temperature is 1100 ℃ ~ 1150 ℃, side in drying grate and rotary kiln junction has been set up secondary combustion chamber, secondary combustion chamber top is with addition of air, the high-temperature flue gas of rotary kiln is in the top secondary combustion, make the upper temp of secondary combustion chamber reach 1200 ℃ ~ 1250 ℃, be introduced into the grate sintering section through high-temperature pipe again and carry out the air distribution sintering, the outlet of drying grate is connected with rotary kiln by an airtight stream sieve, setting up of secondary combustion chamber, prevented that dust enters drying grate in the rotary kiln exhaust gas, will be rich in CO and H simultaneously
2Burn, for drying grate provides high temperature sintering gas, guaranteed the sintering temperature of pelletizing, also guaranteed the control of drying grate and rotary kiln;
(2) in the device of production reduced iron of the present invention, the rotary kiln coal-feeding mode is for being equipped with two coal spouting guns in the kiln hood exit of rotary kiln, the beans spray gun of special winding-up a 5～25mm, also be the reductive agent rifle, adopt spray wind mode of movement, with the distance of particulate coal spray feed to 18m～40m, the beans operational throughput is 1t/h～8t/h, satisfies the demand of reductive agent fully, and beans falls to being the broom shape, according to the coal particle size, coal can be distributed by different distance, the distance of the conveying that particle is big is far away, coal particle is little, the spray feed distance is shorter, makes more even that raw coal distributes of going back in the whole rotary kiln, to guarantee that reducing atmosphere is even in the rotary kiln; The temperature of rotary kiln end is by another fine coal gun controls, and the pulverized coal injection burning can be controlled the temperature in kiln hood exit at 1100 ℃ ~ 1320 ℃;
Rotary kiln temperature inside control mode is on the kiln body case of the middle front part of rotary kiln, by 5 centrifugal blowers of disposed at equal distance, the air port is connected with stainless steel tube, stainless steel tube inserts the rotary kiln medullary ray, and the air port is towards kiln hood, on external every the stainless steel tube of kiln valve is housed, can control air quantity, the temperature of the reduction part of rotary kiln is to adjust kiln temperature by the air quantity of 5 typhoon amounts.
(3) the inventive method is directly to use grade at 35%～55% low poor slow-witted ore deposit, complex ore and iron-containing waste, after it is directly reduced, sub-elect the high-quality reduced iron product of grade more than 90% again, realized the reproducible utilization of resource, saved the energy from another point of view.
Description of drawings
Fig. 1 is device synoptic diagram of the present invention;
Wherein: 1: balling disk (-sc); 2: the pelletizing material distributing machine; 3: drying grate; 4: the backheat blower fan; 5: the fine powder storehouse; 6: rotary kiln; 7: the stream sieve; 8: overfire air fan; 9: the rotary kiln head-shield; 10: the beans spray gun; 11: the fine coal spray gun; 12: metallized pellet; 13: water; 14: water quenching pool; 15: chain mat machine; 16: wet-type ball mill; 17: the wet magnetic separation unit; 18: high-strength cold-pressing balls machine; 19: mine tailing; 20: metal iron powder; 21: the cold-pressing balls product; 22: secondary combustion chamber;
Fig. 2 is process flow sheet of the present invention.
Embodiment
The following describes the book drawings and Examples is described further the present invention.
As shown in Figure 1, the equipment that difficult ore dressing, complex ore and iron-containing waste slag iron separate reduced iron comprises pelletizing material distributing machine 2, drying grate 3, backheat blower fan 4, fine powder storehouse 5, rotary kiln 6, stream sieve 7 and secondary combustion chamber 22; Be provided with balling disk (-sc) 1 in pelletizing material distributing machine 2 the place aheads, described pelletizing material distributing machine 2 is to transport the belt of pelletizing, with drying grate 3 one, is provided with fine powder storehouse 5 between drying grate 3 and rotary kiln 6; Described stream sieve 7 is arranged in the fine powder storehouse 5, and an end links to each other with pelletizing material distributing machine 2 tail ends, and the other end links to each other with rotary kiln 6 tail ends; Described secondary combustion chamber 22 is arranged between drying grate 3 and the rotary kiln 6, and the top of secondary combustion Room 22 is provided with gas pipeline, and links to each other with drying grate 3 tops by gas pipeline, and the bottom of drying grate 3 is connected with backheat blower fan 4, forms the flue gas loop; Equidistantly on the kiln body case of described rotary kiln 6 be furnished with 5 overfire air fans 8, kiln hood is provided with rotary kiln head-shield 9, and beans spray gun 10 is installed in the kiln hood exit and fine coal sprays 11 rifles; Behind rotary kiln 6, be disposed with water quenching pool 14, wet-type ball mill 16, wet magnetic separation unit 17 and the high-strength unit 18 of colding pressing, wherein be provided with chain mat machine 15 between water quenching pool 14 and the wet-type ball mill 16.
It is the reduction beans of 5～25mm that described beans spray gun 10 sprays granularity, and spray gun adopts spray wind mode of movement to spray, blast 65～75KPa, and jet length is 18～40m.
It is the burning fine coal of 0.075～0.096mm that described fine coal spray gun 11 sprays granularity.
The air port of described overfire air fan 8 is connected with pipeline towards kiln hood, and pipeline inserts in the rotary kiln, and at every pipeline valve is installed.
Adopt aforesaid device to carry out difficult ore dressing, complex ore when separating reduced iron with iron-containing waste slag iron, the rotary kiln coal-feeding mode is:
The exit, kiln hood place of rotary kiln, the reduction beans rifle of beans spray gun 10 special winding-up 5～25mm adopts spray wind mode of movement, blast: 65～75KPa, flow: 35～40m
3/ min, can be with the distance of particulate coal spray feed to 18m～40m, the beans operational throughput is 1t/h～8t/h, satisfies the demand of reductive agent fully, and beans falls to being the broom shape, according to the coal particle size, coal can be distributed by different distance, the distance of the conveying that particle is big is far away, coal particle is little, the spray feed distance is shorter, makes more even that raw coal distributes of going back in the whole rotary kiln, to guarantee that reducing atmosphere is even in the rotary kiln.
The temperature of rotary kiln end is by pulverized coal gun 11, the temperature in kiln hood exit can be controlled at 1100 ℃ ~ 1320 ℃.
The kiln temperature control mode is:
On the kiln body case of the middle front part of rotary kiln, by having equidistantly distributed 5 overfire air fans 8, the air port is connected with stainless steel tube, and stainless steel tube inserts the rotary kiln medullary ray, the air port is towards kiln hood, on external every the stainless steel tube of kiln valve is housed, can controls air quantity, the temperature of the reduction part of rotary kiln, be to adjust kiln temperature, the total head of every typhoon machine: 850～900Pa, air quantity: 3500～3800m by the air quantity of 5 typhoon amounts
3/ h.
Embodiment 1
(1) with Inner Mongol sulfate cinder fragmentation, be polished into-200 order particles and account for the powder of massfraction more than 85%, sulfate cinder contains TFe:55%～58%, with addition of the calcium carbonate builder of powder quality 6.0% and 0.4% binding agent, carry out even mixed grind, water spray is made ball, obtain the pelletizing for diameter 8.0～16mm, pelletizing sent into carry out cloth and sintering in the drying grate, the backheat blower fan carries out to hot blast, in 1050 ℃ of sintering 40min, make the agglomerates of sintered pellets that intensity is 300 ~ 400N/ ball, agglomerates of sintered pellets enters rotary kiln by airtight stream sieve, the stream sieve sieves out granularity 5mm following fine powder and small-particle, discharges by bottom, fine powder storehouse;
(2) agglomerates of sintered pellets enters in the rotary kiln in confined conditions, the blast of overfire air fan is 850Pa, air quantity 3500m3/h on the kiln body case of control rotary kiln, the beans lance ejection granularity of rotary kiln outlet is the reduction beans of 5～25mm, spray gun adopts spray wind mode of movement to spray blast 65KPa, flow 35m
3/ min, jet length is 18m, and the beans operational throughput is 1t/h, and agglomerates of sintered pellets reduces 4h under the condition of 1050 ℃ of temperature, and reduction ratio reaches more than 93%, the metallized pellet after obtaining reducing;
The fine coal lance ejection granularity of rotary kiln outlet is the burning fine coal of 0.075 ~ 0.096mm, its emitted dose is 1100 ℃ of control rotary kiln temperature outs, metallized pellet is in 1100 ℃ of insulation 2h, the slag iron that enters the high temperature iron grain growth separates the reduction zone, the metallic iron crystal grain-growth is to 100 μ m～3mm, and metallic iron and gangue are assembled respectively;
(3) metallic iron of assembling respectively and gangue enter the water quenching pool cooling from the rotary kiln outlet, enter wet-type ball mill by chain mat machine after being smashed the balling-up piece by current, the ball piece is polished into-0.075mm accounts for quality more than 85%, enter the wet magnetic separation unit again, isolate gangue and metal iron powder, the metal iron powder grade index that obtains is as shown in table 1.
The metal iron powder index that table 1 embodiment 1 obtains
Embodiment 2
(1) with Hunan oolitic hematite fragmentation, be polished into-200 order particles and account for the powder of massfraction more than 85%, the Hunan oolitic hematite contains TFe45.45%, with addition of the calcium oxide auxiliary agent of powder quality 8.0% and 1.0% binding agent, carry out even mixed grind, water spray is made ball, obtain the pelletizing for diameter 8.0～16mm, pelletizing sent into carry out cloth and sintering in the drying grate, the backheat blower fan carries out to hot blast, in 1180 ℃ of sintering 20min, make the agglomerates of sintered pellets that intensity is 300 ~ 400N/ ball, agglomerates of sintered pellets enters rotary kiln by airtight stream sieve, the stream sieve sieves out granularity 5mm following fine powder and small-particle, discharges by bottom, fine powder storehouse;
(2) agglomerates of sintered pellets enters in the rotary kiln in confined conditions, and the blast of overfire air fan is 900Pa, air quantity 3800m on the kiln body case of control rotary kiln
3/ h, the beans lance ejection granularity of rotary kiln outlet is the reduction beans of 5 ~ 25mm, spray gun adopts spray wind mode of movement to spray, blast 75KPa, flow 40m3/min, jet length is 40m, and the beans operational throughput is 8t/h, and agglomerates of sintered pellets is reductase 12 h under the condition of 1100 ℃ of temperature, reduction ratio reaches more than 93%, the metallized pellet after obtaining reducing;
The fine coal lance ejection granularity of rotary kiln outlet is the burning fine coal of 0.075～0.096mm, its emitted dose is 1320 ℃ of control rotary kiln temperature outs, metallized pellet is in 1320 ℃ of insulation 2h, the slag iron that enters the high temperature iron grain growth separates the reduction zone, the metallic iron crystal grain-growth is to 100 μ m～3mm, and metallic iron and gangue are assembled respectively;
(3) metallic iron of assembling respectively and gangue enter the water quenching pool cooling from the rotary kiln outlet, enter wet-type ball mill by chain mat machine after being smashed the balling-up piece by current, the ball piece is polished into-0.075mm accounts for quality more than 85%, enter the wet magnetic separation unit again, isolate gangue and metal iron powder, the metal iron powder grade index that obtains is as shown in table 2.
The metal iron powder index that table 2 embodiment 2 obtains
Embodiment 3
(1) with Indonesia's red soil nickel ore fragmentation, be polished into-200 order particles and account for the powder of massfraction more than 85%, Indonesia's red soil nickel ore contains TFe18.58%, Ni1.8%, with addition of the Calcium Fluoride (Fluorspan) auxiliary agent of powder quality 10.0% and 2.0% binding agent, carry out even mixed grind, water spray is made ball, obtain the pelletizing for diameter 8.0～16mm, pelletizing sent into carry out cloth and sintering in the drying grate, the backheat blower fan carries out to hot blast, in 1100 ℃ of sintering 30min, make the agglomerates of sintered pellets that intensity is 300 ~ 400N/ ball, agglomerates of sintered pellets enters rotary kiln by airtight stream sieve, the stream sieve sieves out granularity 5mm following fine powder and small-particle, discharges by bottom, fine powder storehouse;
(2) agglomerates of sintered pellets enters in the rotary kiln in confined conditions, the blast of overfire air fan is 880Pa, air quantity 3600m3/h on the kiln body case of control rotary kiln, the beans lance ejection granularity of rotary kiln outlet is the reduction beans of 5～25mm, spray gun adopts spray wind mode of movement to spray blast 70KPa, flow 38m
3/ min, jet length is 30m, and the beans operational throughput is 5t/h, and agglomerates of sintered pellets reduces 1.8h under the condition of 1080 ℃ of temperature, and reduction ratio reaches more than 93%, the metallized pellet after obtaining reducing;
The fine coal lance ejection granularity of rotary kiln outlet is the burning fine coal of 0.075～0.096mm, its emitted dose is 1200 ℃ of control rotary kiln temperature outs, metallized pellet is in 1200 ℃ of insulation 1.8h, the slag iron that enters the high temperature iron grain growth separates the reduction zone, the metallic iron crystal grain-growth is to 100 μ m～3mm, and metallic iron and gangue are assembled respectively;
(3) metallic iron of assembling respectively and gangue enter the water quenching pool cooling from the rotary kiln outlet, enter wet-type ball mill by chain mat machine after being smashed the balling-up piece by current, the ball piece is polished into-0.075mm accounts for quality more than 85%, enter the wet magnetic separation unit again, isolate gangue and metal iron powder, the metal iron powder grade index that obtains is as shown in table 3.
The metal iron powder index that table 2 embodiment 3 obtains
With above-mentioned metal iron powder or metallic nickel iron powder, adopt high-strength ball press, be cold-pressed into pelletizing, its leading indicator is:
Claims (7)
1. a difficult ore dressing, complex ore and iron-containing waste slag iron separate the equipment of reduced iron, comprise pelletizing material distributing machine, drying grate, backheat blower fan, fine powder storehouse, rotary kiln and stream sieve, secondary combustion chamber; Be provided with balling disk (-sc) in pelletizing material distributing machine the place ahead, described pelletizing material distributing machine is to transport the belt of pelletizing, with the drying grate one, is provided with the fine powder storehouse between drying grate and rotary kiln; It is characterized in that described stream sieve is arranged in the fine powder storehouse, an end links to each other with pelletizing material distributing machine tail end, and the other end links to each other with the rotary kiln tail end; Described secondary combustion chamber is arranged between drying grate and the rotary kiln, and the top of secondary combustion chamber is provided with gas pipeline, and links to each other with the drying grate top by gas pipeline, and the bottom of drying grate is connected with the backheat blower fan, forms the flue gas loop; The equidistant overfire air fan that is furnished with on the kiln body case of described rotary kiln, the kiln hood exit is equipped with beans spray gun and fine coal spray gun; Behind rotary kiln, be disposed with water quenching pool, wet-type ball mill, wet magnetic separation unit and the high-strength unit of colding pressing, wherein be provided with chain mat machine between water quenching pool and the wet-type ball mill.
2. a kind of difficult ore dressing according to claim 1, complex ore and iron-containing waste slag iron separate the equipment of reduced iron, it is characterized in that described beans lance ejection granularity is the reduction beans of 5～25mm, spray gun adopts spray wind mode of movement to spray, blast 65～75KPa, jet length is 18～42m.
3. a kind of difficult ore dressing according to claim 1, complex ore and iron-containing waste slag iron separate the equipment of reduced iron, it is characterized in that described fine coal lance ejection granularity is the burning fine coal of 0.075～0.096mm.
4. a kind of difficult ore dressing according to claim 1, complex ore and iron-containing waste slag iron separate the equipment of reduced iron, it is characterized in that the air port of described overfire air fan is towards kiln hood, be connected with pipeline, pipeline inserts in the rotary kiln, and at every pipeline valve is installed.
5. adopt difficult ore dressing, complex ore and the method that iron-containing waste slag iron separates the device fabrication reduced iron of reduced iron of claim 1 to carry out according to following steps:
(1) with difficult ore dressing, complex ore or iron-containing waste fragmentation, be polished into-200 order particles and account for the breeze of massfraction more than 85%, with addition of the auxiliary agent of powdered ore quality 6.0～10.0% and 0.4～2.0% binding agent, carry out even mixed grind, water spray is made ball, obtain the pelletizing of diameter 8.0～16mm, pelletizing sent into carry out cloth and sintering in the drying grate, the backheat blower fan carries out to hot blast, in 1050 ~ 1180 ℃ of sintering 20～40min, make the agglomerates of sintered pellets that intensity is 300 ~ 400N/ ball, agglomerates of sintered pellets enters rotary kiln by airtight stream sieve, and the stream sieve sieves out granularity 5mm following fine powder and small-particle, discharges by bottom, fine powder storehouse;
(2) agglomerates of sintered pellets enters in the rotary kiln in confined conditions, adopt the beans spray gun to spray into the reduction beans that granularity is 5 ~ 25mm, agglomerates of sintered pellets is reductase 12～4h under the condition of 1050 ~ 1100 ℃ of temperature, and reduction ratio reaches more than 93%, the metallized pellet after obtaining reducing;
The fine coal lance ejection granularity of rotary kiln outlet is the burning fine coal of 0.075 ~ 0.096mm, metallized pellet is in 1100 ~ 1320 ℃ of insulation 1.5～2h, the slag iron that enters the high temperature iron grain growth separates the reduction zone, and the metallic iron crystal grain-growth is to 100 μ m～3mm, and metallic iron and gangue gather respectively;
(3) metallic iron that gathers respectively and gangue enter the water quenching pool cooling from the rotary kiln outlet, enter wet-type ball mill by chain mat machine after being smashed the balling-up piece by current, the ball piece is polished into-0.075mm accounts for the powder more than 85%, enter the wet magnetic separation unit again, isolate gangue and metal iron powder, the metal iron powder grade that obtains is more than 90%, degree of metalization more than 93%, the rate of recovery is more than 93%;
Metal iron powder obtains density at 4.0t/m after high-strength cold-pressing balls machine is colded pressing
3More than, granularity is the metallic iron cold pressing block product of 20～45mm.
6. the difficult ore dressing of employing according to claim 5, complex ore and the method that iron-containing waste slag iron separates the device fabrication reduced iron of reduced iron is characterized in that described difficult ore dressing is oolitic hematite, antelope stone iron ore, rhombohedral iron ore, limonite or spathic iron ore; Described complex ore is red soil nickel ore, paigeite or ferrous manganese ore; Described iron-containing waste is sulfate slag, alumina laterite, ferrochrome slag or dedusting ash.
7. the difficult ore dressing of employing according to claim 5, complex ore and the method that iron-containing waste slag iron separates the device fabrication reduced iron of reduced iron is characterized in that described auxiliary agent is calcium oxide, calcium carbonate or Calcium Fluoride (Fluorspan); Binding agent is commercial high polymer binder, and main component is Xylo-Mucine or Sodium salts humic acids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189325.4A CN103290161B (en) | 2013-05-21 | 2013-05-21 | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310189325.4A CN103290161B (en) | 2013-05-21 | 2013-05-21 | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103290161A true CN103290161A (en) | 2013-09-11 |
| CN103290161B CN103290161B (en) | 2015-07-01 |
Family
ID=49091687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310189325.4A Active CN103290161B (en) | 2013-05-21 | 2013-05-21 | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103290161B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019674A (en) * | 2014-06-24 | 2014-09-03 | 中冶长天国际工程有限责任公司 | Air cooling temperature-controlled re-combustion chamber for direct reduction |
| CN105018722A (en) * | 2015-08-12 | 2015-11-04 | 唐竹胜 | Method for separating and reducing iron powder from refractory mineral, complex ore and iron-containing waste materials |
| CN107815537A (en) * | 2017-12-07 | 2018-03-20 | 中国恩菲工程技术有限公司 | Vanadium titano-magnetite processing unit |
| CN107858502A (en) * | 2017-12-07 | 2018-03-30 | 中国恩菲工程技术有限公司 | Vanadium titano-magnetite processing method |
| CN109576487A (en) * | 2019-01-11 | 2019-04-05 | 江苏荣鑫伟业新材料股份有限公司 | A method of iron is recycled using red mud and dedusting ash mixing reduction roasting magnetic separation |
| CN110273040A (en) * | 2019-08-02 | 2019-09-24 | 唐山鑫虎冶金科技有限公司 | Iron powder is cold-pressed reduction apparatus and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758046A (en) * | 2012-03-20 | 2012-10-31 | 沈阳博联特熔融还原科技有限公司 | Shortened production equipment and method of coal-based direct reduced iron |
| CN102778124A (en) * | 2012-07-10 | 2012-11-14 | 沈阳博联特熔融还原科技有限公司 | Secondary radial air-supplying device for direct reduction equipment of rotary kiln |
| CN102828022A (en) * | 2012-09-11 | 2012-12-19 | 新兴能源装备股份有限公司 | Production process of pure hematite alkaline pellets |
| CN102853680A (en) * | 2012-08-14 | 2013-01-02 | 沈阳博联特熔融还原科技有限公司 | Secondary combustion equipment for directly reducing in grate kiln |
| CN102936653A (en) * | 2012-11-23 | 2013-02-20 | 沈阳博联特熔融还原科技有限公司 | Method for reducing high-density metallized pellet |
-
2013
- 2013-05-21 CN CN201310189325.4A patent/CN103290161B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758046A (en) * | 2012-03-20 | 2012-10-31 | 沈阳博联特熔融还原科技有限公司 | Shortened production equipment and method of coal-based direct reduced iron |
| CN102778124A (en) * | 2012-07-10 | 2012-11-14 | 沈阳博联特熔融还原科技有限公司 | Secondary radial air-supplying device for direct reduction equipment of rotary kiln |
| CN102853680A (en) * | 2012-08-14 | 2013-01-02 | 沈阳博联特熔融还原科技有限公司 | Secondary combustion equipment for directly reducing in grate kiln |
| CN102828022A (en) * | 2012-09-11 | 2012-12-19 | 新兴能源装备股份有限公司 | Production process of pure hematite alkaline pellets |
| CN102936653A (en) * | 2012-11-23 | 2013-02-20 | 沈阳博联特熔融还原科技有限公司 | Method for reducing high-density metallized pellet |
Non-Patent Citations (1)
| Title |
|---|
| 傅菊英等: "《烧结球团学》", 29 February 1996, article "链篦机-回转窑", pages: 340-344 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019674A (en) * | 2014-06-24 | 2014-09-03 | 中冶长天国际工程有限责任公司 | Air cooling temperature-controlled re-combustion chamber for direct reduction |
| CN105018722A (en) * | 2015-08-12 | 2015-11-04 | 唐竹胜 | Method for separating and reducing iron powder from refractory mineral, complex ore and iron-containing waste materials |
| CN107815537A (en) * | 2017-12-07 | 2018-03-20 | 中国恩菲工程技术有限公司 | Vanadium titano-magnetite processing unit |
| CN107858502A (en) * | 2017-12-07 | 2018-03-30 | 中国恩菲工程技术有限公司 | Vanadium titano-magnetite processing method |
| CN109576487A (en) * | 2019-01-11 | 2019-04-05 | 江苏荣鑫伟业新材料股份有限公司 | A method of iron is recycled using red mud and dedusting ash mixing reduction roasting magnetic separation |
| CN110273040A (en) * | 2019-08-02 | 2019-09-24 | 唐山鑫虎冶金科技有限公司 | Iron powder is cold-pressed reduction apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103290161B (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101413057B (en) | Method for efficiently separating low-ore grade and complicated iron ore | |
| CN103290161B (en) | Equipment and method for carrying out slag-iron separation and iron reduction on refractory ore, complex ore and chemical industry ferruginous waste | |
| CN102268535B (en) | Reduction and magnetic roasting process for low-grade metal minerals in rotary kiln | |
| CN103667675A (en) | Treatment method of laterite-nickel ore | |
| CN106868245B (en) | A kind of molten iron making processes of two-step method | |
| CN108380360B (en) | Production process of steel slag and iron fine powder | |
| CN104928428B (en) | Molten point of recovery method of the coal dust of low-grade iron resource | |
| CN104195279A (en) | Process for preparing ferric-nickel from laterite-nickel ore | |
| CN102634622A (en) | Method for reducing and separating metallic irons by using refractory ores, complex ores and iron-containing wastes | |
| CN105463147A (en) | Method for producing nickel iron powder by directly reducing nickel laterite ores in rotary kiln | |
| CN104164556A (en) | Chain grate-tandem rotary kiln whole-particle fraction magnetic roasting process for refractory low-grade iron ore | |
| CN103882224B (en) | A kind of manifold type sintering method of low-grade laterite nickel ore | |
| CN113699370A (en) | Process for producing semisteel by coal-based hydrogen metallurgy, hot agglomeration and electric furnace in iron ore concentrate rotary kiln | |
| CN108342535A (en) | A kind of method of tunnel oven and its high-yield and high-efficiency fast deep reduced iron | |
| CN104745806B (en) | A kind of difficulty selects iron ore of low ore grade shaft furnace with addition of semi-coke magnetic roasting process | |
| CN105907990A (en) | Method of producing ferrocolumbium | |
| CN103866115B (en) | The preparation of red soil nickel ore single stage method is containing the method for nickel and stainless steel raw material | |
| CN102268502B (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN104651564A (en) | Method for reducing and separating granular iron rapidly at low temperature | |
| CN103805773B (en) | Powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method | |
| CN103205584B (en) | Production device and production method of manganese monoxide mineral powder | |
| CN103305650B (en) | Efficient comprehensive utilization method of siderite resource | |
| CN112195301A (en) | Direct reduction-melting separation system and method | |
| CN204039332U (en) | The metallurgical restoring system of coal gas circulation coal wholegrain radial sector pyrolysis coupling | |
| CN102312081B (en) | Method of preparing nickel alloy from nickel laterite ores with vehicle rapid reducing furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |