CN110484718A - A kind of grate concurrent heating system and method for suitable iron ore concentrate production - Google Patents
A kind of grate concurrent heating system and method for suitable iron ore concentrate production Download PDFInfo
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- CN110484718A CN110484718A CN201910952654.7A CN201910952654A CN110484718A CN 110484718 A CN110484718 A CN 110484718A CN 201910952654 A CN201910952654 A CN 201910952654A CN 110484718 A CN110484718 A CN 110484718A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 149
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 21
- 239000012141 concentrate Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005192 partition Methods 0.000 claims abstract description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 106
- 238000001816 cooling Methods 0.000 claims abstract description 104
- 238000001035 drying Methods 0.000 claims abstract description 65
- 238000005422 blasting Methods 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims description 20
- 238000005453 pelletization Methods 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 11
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 10
- 239000003517 fume Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000567 combustion gas Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
- C22B1/205—Sintering; Agglomerating in sintering machines with movable grates regulation of the sintering process
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- 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
The present invention relates to a kind of grate concurrent heating system and methods of suitable iron ore concentrate production, including water cooling partition wall I is arranged between blasting drying period and down-draft drying zone, setting is in the dry water cooling partition wall II between I sections of grate preheating of exhausting and setting preheats I sections in grate and grate preheats water cooling partition wall III between II sections, it is characterized in that, the concurrent heating mechanism I to blasting drying period concurrent heating is equipped in the water cooling partition wall I, the concurrent heating mechanism II that I sections of concurrent heatings are preheated to grate is equipped in water cooling partition wall II, the concurrent heating mechanism III that II sections of concurrent heatings are preheated to grate is equipped in water cooling partition wall III.This novel concurrent heating mode, not only can in the case where not losing down-draft drying zone or blasting drying period hot wind heat and air quantity by built-in concurrent heating nozzle to blasting drying period upper cover concurrent heating, control blasting drying period on case temperature into, grate mechanical part can also be avoided for a long time by high-temperature baking simultaneously, to increase the service life of grate.
Description
Technical field
The present invention relates to pellet production technical field, especially a kind of grate concurrent heating system of suitable iron ore concentrate production
And method.
Background technique
Iron ore concentrate generally has magnetic iron ore, bloodstone, limonite in pelletizing production technique, and grate concurrent heating technique is usually
Applied to bloodstone and limonite.Grate is generally divided into blasting drying period, down-draft drying zone, I sections of preheating according to thermal regulation
With II sections of preheating, about 250 DEG C of hot-air of blasting drying period needs are from three sections of ring cold machine, the hot cigarette that down-draft drying zone needs
About 450 DEG C of gas preheat II sections from grate, preheat I sections of about 600 DEG C of hot fume needed from two sections of ring cold machine, preheat
About 1000 DEG C of hot fume of II sections of needs are from rotary kiln.
Contain a certain amount of FeO in magnetic iron ore, FeO is preheated in grate occurs exothermic oxidation reaction in I, II sections, reaction
The heat of middle releasing meets the production requirement of magnetic iron ore, so preheating I in the grate technique of production magnetic iron ore, II sections are not necessarily to
Carry out additional concurrent heating.
FeO content is low in bloodstone and limonite, cannot obtain heat by FeO oxidation heat liberation in preheating I, II section,
So needing to preheat I in grate, carrying out concurrent heating operation in II section when production bloodstone and limonite.
In previous design, heat patching method is usually to preheat I in grate, installation concurrent heating spray on II section of side wall
Mouth preheats I, II section of progress concurrent heating to grate by burning heat caused by the coal gas of high heating value.The advantages of this method
It is that structure type is simple, it is easy to install, easily overhaul.Since grate preheats I, the hot fume in II II sections of upper cover uses exhausting shape
Formula makes hot fume pass through pellet by upper cover and enters in bellows.And the concurrent heating nozzle of preheating section is mounted on upper cover side wall
On, the flame that the auxiliary combustion of opposite side installation generates is since the influence of downward exhausting can not reach grate upper cover center, just
Flame is caused to burn downwards.The harm of this combustion phenomena: 1, the temperature field caused in preheating section upper cover is uneven, center
Temperature is low, and two sides temperature is high, has seriously affected the integral strength and quality of pelletizing；2, the baking due to long-time by thermal-flame
Roasting, the mechanical equipment of upper cover two sides can occur serious deformation and go around, serious to will cause grate grate plate and side wall steel construction
It burns down, causes great production accident.
Blasting drying period hot-air is provided by ring cold machine section, and hot-air penetrates pelletizing by way of air blast from bottom to top
Layer, achievees the effect that dry pelletizing.Air after cooling is discharged in atmosphere through piping, deduster, blower.Cooling Air Temperature
It is about 80 DEG C very low to spend general temperature, and also contains a certain amount of moisture content in air, if not carrying out concurrent heating to low temperature humid air
Processing, can damage pipeline, deduster, blower itself, cause promptly to stop production when serious.
It is generally hot using down-draft drying zone for the low temperature humid air that concurrent heating blasting drying period excludes in previous design
About 400 DEG C of gas does not enter about 250 DEG C of grate blasting drying period hot-air to its concurrent heating.It is mended using down-draft drying zone hot gas
Heat, drawback are that the hot air temperature after concurrent heating is generally all higher than 200 DEG C, and this high temperature hot gas equally causes deduster and blower
Injury.And using the air quantity of part down-draft drying zone, down-draft drying zone work air quantity certainly will be reduced, to down-draft drying zone
Thermal regulation causes influence.Using blasting drying period hot gas concurrent heating, drawback is the air quantity using part blasting drying period, gesture
Blasting drying period work air quantity must be reduced, influence is caused on the thermal regulation of blasting drying period.
Summary of the invention
The object of the present invention is to provide the grate concurrent heating systems and technique of a kind of suitable iron ore concentrate production.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of grate concurrent heating system of suitable iron ore concentrate production of the invention, including grate blasting drying period upper cover,
Grate down-draft drying zone upper cover, grate preheats I section upper covers, grate preheats II section of upper cover, setting in blasting drying period and
Water cooling partition wall I, setting in the dry water cooling partition wall II between I sections of grate preheating of exhausting and are arranged in chain between down-draft drying zone
Grate machine preheats I sections and grate preheats water cooling partition wall III between II section, which is characterized in that is equipped in the water cooling partition wall I
To the concurrent heating mechanism I of blasting drying period concurrent heating, the concurrent heating mechanism that I sections of concurrent heatings are preheated to grate is equipped in water cooling partition wall II
II, the concurrent heating mechanism III that II sections of concurrent heatings are preheated to grate is equipped in water cooling partition wall III,
The cooling water on the outside of porcelain bushing is arranged in by the porcelain bushing being embedded in three water cooling partition walls in three concurrent heating mechanisms
Pipe, the gas pipeline and comburent air duct that are arranged in porcelain bushing and connect with gas pipeline and comburent air duct and
The concurrent heating nozzle being embedded on water cooling partition wall center line is formed, and is respectively equipped with combustion gas on gas pipeline and comburent air duct
Control valve and air shut-off valve；
Concurrent heating jet expansion direction setting identical as pelletizing traffic direction in grate in water cooling partition wall I, in water cooling partition wall II
Concurrent heating nozzle and water cooling partition wall III in concurrent heating nozzle export direction and grate in pelletizing traffic direction be oppositely arranged.
Further, the concurrent heating nozzle mounting height is the horizontal direction at 1000mm at the top of grate upper cover
It is upper consistent with grate center line.
Further, the water cooling partition wall I by partition wall pedestal, partition wall ontology and is arranged in partition wall pedestal and partition wall ontology
Between partition wall cooling water pipe formed, the water cooling partition wall II and water cooling partition wall III are identical as I structure of water cooling partition wall.
Further the partition wall pedestal is made of four blocks of angle steel, and partition wall cooling water pipe is welded in four pieces of angle steel compositions
On partition wall pedestal, anchoring piece is equipped on partition wall cooling water pipe, for partition wall cooling water pipe to be embedded in partition wall lower part.
Further water cooling partition wall I, water cooling partition wall II and the water cooling partition wall III are made of refractory brick, whole
Width is 500, and length is of same size with grate.
A kind of grate heat patching method of suitable iron ore concentrate production of the invention, characterized in that it comprises the following steps:
1) water cooling partition wall I is set between blasting drying period and down-draft drying zone, it is dry between I sections of grate preheating in exhausting
If water cooling partition wall II, I sections are preheated in grate and grate preheats and water cooling partition wall III is arranged between II section, by partition wall pedestal two sides
Anchor studs are welded, and falls to beat castable and is fixed on grate top, partition wall pedestal top and partition wall cooling water pipe are welded into one
Whole, the height of water cooling partition wall is identical as grate upper cover height；
2) it is equipped with the concurrent heating mechanism I to down-draft drying zone concurrent heating in water cooling partition wall I, is equipped in water cooling partition wall II to grate
The concurrent heating mechanism II for preheating I sections of concurrent heatings is equipped with the concurrent heating mechanism II that II sections of concurrent heatings are preheated to grate, water in water cooling partition wall III
The setting identical as pelletizing traffic direction in grate of the concurrent heating jet expansion direction of concurrent heating mechanism in cold shut wall I, and be embedded in
In water cooling partition wall I, the concurrent heating of the concurrent heating mechanism in the concurrent heating nozzle and water cooling partition wall III of the concurrent heating mechanism in water cooling partition wall II is sprayed
Pelletizing traffic direction is oppositely arranged in the export direction and grate of mouth, and is embedded in water cooling partition wall II and water cooling partition wall III respectively
It is interior；
3) when the air themperature in grate blasting drying period upper cover 1 is lower than 100 DEG C, the combustion gas control in concurrent heating mechanism I is opened
Valve and air shut-off valve processed are done grate air blast by carrying out concurrent heating to grate blasting drying period with concurrent heating concurrent heating nozzle
Dry section is increased to 110 DEG C；
4) grate preheats hot-air in I sections of upper covers and comes from 2 sections of ring cold machine, when producing bloodstone or limonite, preheats in I section
It when case temperature is lower than 600 DEG C, opens I sections of preheating and carries out concurrent heating with concurrent heating concurrent heating nozzle, case temperature in preheating I section is improved
To 600 DEG C；
5) grate preheats hot fume in II sections of upper covers and comes from rotary kiln, when producing bloodstone or limonite, preheats II
It when case temperature is lower than 1000 DEG C in section, opens I sections of preheating and carries out concurrent heating with concurrent heating concurrent heating nozzle, will preheat warm in II section of upper cover
Degree is improved to 1000 DEG C.
The invention has the advantages that
The concurrent heating nozzle as built in the present invention in water cooling partition wall, combustion gas is by the concurrent heating nozzle that is embedded in water cooling partition wall in chain grate
Burning in machine upper cover.Water cooling partition wall designs in grate upper cover, and concurrent heating nozzle is embedded on water cooling partition wall center line (and chain
Grate machine center line), the flame that concurrent heating jet combustion generates is parallel to grate pelletizing traffic direction (grate length direction).By
It burns on grate center line in flame, bellows draft influences very little to flame.Combustion gas full combustion in grate upper cover,
Not only make the even intensity of pelletizing, and also adds the service life of mechanical equipment.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is water cooling partition wall enlarged drawing.
Fig. 3 is the A direction view of Fig. 2.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1-Figure 3, the grate concurrent heating system of a kind of suitable iron ore concentrate production of the invention, including grate drum
1 grate down-draft drying zone upper cover 2 of wind dryer section upper cover, grate preheats I sections of upper covers 3, grate preheats II section of upper cover 4, sets
Set water cooling partition wall I 5, the setting water between exhausting drying and I sections of grate preheating between blasting drying period and down-draft drying zone
Cold shut wall II 6 and setting the water cooling partition wall III 7 between II section of I sections of grate preheating and grate preheating, which is characterized in that in institute
It is equipped with the concurrent heating mechanism I to blasting drying period concurrent heating in the water cooling partition wall I 5 stated, is equipped in water cooling partition wall II 6 pre- to grate
The concurrent heating mechanism II of hot I sections of concurrent heating is equipped with the concurrent heating mechanism III that II sections of concurrent heatings are preheated to grate in water cooling partition wall III 7,
The cold of 11 outside of porcelain bushing is arranged in by the porcelain bushing 11 being embedded in three water cooling partition walls in three concurrent heating mechanisms
But water pipe 12, be arranged in the gas pipeline 13 in porcelain bushing 11 and comburent air duct 14 and with gas pipeline and combustion-supporting sky
Feed channel connects and the concurrent heating nozzle being embedded on water cooling partition wall center line is formed, and manages in gas pipeline 13 and combustion air 14
Gas control valve and air shut-off valve are respectively equipped on road；
81 export direction of concurrent heating nozzle setting identical as pelletizing traffic direction in grate in water cooling partition wall I 5, water cooling partition wall II
The export direction of the concurrent heating nozzle 83 in concurrent heating nozzle 82 and water cooling partition wall III in 6 is opposite with pelletizing traffic direction in grate
Setting.
Concurrent heating nozzle mounting height of the present invention be apart from the place 1000mm at the top of grate upper cover, in horizontal direction and
Grate center line is consistent.
Water cooling partition wall I of the present invention is by partition wall pedestal 51, partition wall ontology 54 and is arranged in partition wall pedestal 51 and partition wall
Partition wall cooling water pipe 52 between ontology 54 is formed, and the partition wall pedestal 51 is made of four blocks of angle steel, partition wall cooling water pipe
52 are welded on the partition wall pedestal 51 of four blocks of angle steel composition, and anchoring piece 53 is equipped on partition wall cooling water pipe 52, are used for partition wall
Cooling water pipe 52 is embedded in partition wall lower part, and the water cooling partition wall II 6 and water cooling partition wall III 7 are identical as I 5 structure of water cooling partition wall.
Water cooling partition wall I, water cooling partition wall II and water cooling partition wall III of the present invention are made of refractory brick, whole wide
Degree is 500, and length is of same size with grate.
A kind of grate heat patching method of suitable iron ore concentrate production of the invention, characterized in that it comprises the following steps:
1) water cooling partition wall I 5 is set between blasting drying period and down-draft drying zone, in exhausting drying and grate preheating I section
Between set water cooling partition wall II 6, preheat I section and grate in grate and preheat setting water cooling partition wall III 7 between II section, by partition wall pedestal
Anchor studs are welded in 51 two sides, and fall to beat castable and be fixed on grate top, 51 top of partition wall pedestal and partition wall cooling water pipe 52
It is welded into an entirety, the height of water cooling partition wall 51 is identical as grate upper cover height；
2) it is equipped with the concurrent heating mechanism I to down-draft drying zone concurrent heating in water cooling partition wall I 5, directed chain grate is set in water cooling partition wall II 6
Machine preheats the concurrent heating mechanism I of I sections of concurrent heatings, and the concurrent heating mechanism II that II section of concurrent heating is preheated to grate is equipped in water cooling partition wall III 7,
The setting identical as pelletizing traffic direction in grate of the concurrent heating jet expansion direction of concurrent heating mechanism in water cooling partition wall I 5, and it is pre-buried
Concurrent heating mechanism III in water cooling partition wall I, in the concurrent heating nozzle 81 and water cooling partition wall III 3 of the concurrent heating mechanism I in water cooling partition wall II 6
Concurrent heating nozzle export direction and grate in pelletizing traffic direction be oppositely arranged, and be embedded in II 6 He of water cooling partition wall respectively
In water cooling partition wall III 7；
3) in actual production, when the air themperature in grate blasting drying period upper cover 1 is lower than 100 DEG C, concurrent heating machine is opened
Gas control valve and air shut-off valve on structure I, by carrying out concurrent heating to grate blasting drying period with concurrent heating nozzle 81, by chain
The temperature of grate apparatus for forced section is increased to 110 DEG C；
No matter which kind of raw material pelletizing plant uses, and is essential design to concurrent heating in blasting drying period upper cover.But exhausting is dry
Dry section: for the hot fume due to down-draft drying zone from preheating II sections, exhaust gas volumn or flue-gas temperature can meet the life of various raw materials
It produces, so down-draft drying zone is without designing concurrent heating nozzle.
4) grate preheats I sections: using concurrent heating nozzle 82, pottery taking out, installing I sections of preheating between I sections of preheating on water cooling partition wall 6
Porcelain bushing shell 11 is mounted on I sections of preheating with outside concurrent heating nozzle 82, and cooling water pipe 12 is on installation porcelain bushing 11.I sections of preheating
Identical as pelletizing traffic direction in grate with 82 export direction of concurrent heating nozzle, the flame that concurrent heating nozzle generates is along grate drum
The burning of 1 length direction of wind dryer section upper cover, the pressure of grate two sides bellows influence flame smaller.When production bloodstone or brown
When iron ore, when case temperature is lower than 600 DEG C in preheating I section, opens I sections of preheating and carry out concurrent heating with concurrent heating concurrent heating nozzle 82, it will be pre-
Case temperature is improved to 600 DEG C in hot I section；In actual production, grate preheats hot-air in I sections of upper covers and comes from ring cold machine 2
Section, if upper case temperature fails to meet production requirements, opens I sections of preheating and uses concurrent heating nozzle when producing bloodstone or limonite
82 carry out concurrent heating.
5) grate preheats hot fume in II section of upper cover and comes from rotary kiln, when producing bloodstone or limonite, in advance
It when II section of heat upper case temperature is lower than 1000 DEG C, opens I sections of preheating and carries out concurrent heating with concurrent heating concurrent heating nozzle 83, will preheat on II section
Case temperature is improved to 1000 DEG C.
By the present invention be arranged in gas control valve on 14 pipeline of gas pipeline 13 and combustion air and air shut-off valve with
Chain
Grate machine automatic control system is connected, can be any to adjust the useless of blasting drying period upper cover by the control to gas quantity
Temperature degree.This novel concurrent heating mode can not only not lose down-draft drying zone or blasting drying period hot wind heat and air quantity
In the case where by built-in concurrent heating nozzle to blasting drying period upper cover concurrent heating, control case temperature on blasting drying period, Jin Erbao
Protect the subsequent pipeline of blasting drying period upper cover, equipment；It can also avoid grate mechanical part for a long time by high-temperature baking simultaneously,
To increase the service life of grate.
Claims (6)
1. a kind of grate concurrent heating system of suitable iron ore concentrate production, including grate blasting drying period upper cover, grate exhausting
Dryer section upper cover, grate preheats I sections of upper covers, grate preheats II sections of upper covers, is arranged in blasting drying period and down-draft drying zone
Between water cooling partition wall I, setting exhausting is dry and grate preheats between I section water cooling partition wall II and setting in grate preheating I
Section and grate preheat water cooling partition wall III between II sections, which is characterized in that are equipped in the water cooling partition wall I to forced air drying
Section concurrent heating concurrent heating mechanism I, in water cooling partition wall II be equipped with to grate preheat I sections of concurrent heatings concurrent heating mechanism II, water cooling every
The concurrent heating mechanism III that II sections of concurrent heatings are preheated to grate is equipped in wall III,
The cooling water on the outside of porcelain bushing is arranged in by the porcelain bushing being embedded in three water cooling partition walls in three concurrent heating mechanisms
Pipe, the gas pipeline and comburent air duct that are arranged in porcelain bushing and connect with gas pipeline and comburent air duct and
The concurrent heating nozzle being embedded on water cooling partition wall center line is formed, and is respectively equipped with combustion gas on gas pipeline and comburent air duct
Control valve and air shut-off valve；
Concurrent heating jet expansion direction setting identical as pelletizing traffic direction in grate in water cooling partition wall I, in water cooling partition wall II
Concurrent heating nozzle and water cooling partition wall III in concurrent heating nozzle export direction and grate in pelletizing traffic direction be oppositely arranged.
2. the grate concurrent heating system of suitable iron ore concentrate production according to claim 1 includes on grate blasting drying period
Cover, which is characterized in that the concurrent heating nozzle mounting height be apart from the place 1000mm at the top of grate upper cover, in horizontal direction and
Grate center line is consistent.
3. the grate concurrent heating system of suitable iron ore concentrate production according to claim 1 includes on grate blasting drying period
Cover, which is characterized in that the water cooling partition wall I by partition wall pedestal, partition wall ontology and setting partition wall pedestal and partition wall ontology it
Between partition wall cooling water pipe formed, the water cooling partition wall II and water cooling partition wall III are identical as I structure of water cooling partition wall.
4. the grate concurrent heating system of suitable iron ore concentrate production according to claim 3 includes on grate blasting drying period
Cover, which is characterized in that the partition wall pedestal is made of four blocks of angle steel, partition wall cooling water pipe be welded in four blocks of angle steel composition every
On wall pedestal, anchoring piece is equipped on partition wall cooling water pipe, for partition wall cooling water pipe to be embedded in partition wall lower part.
5. the grate concurrent heating system of suitable iron ore concentrate production according to claim 3 includes on grate blasting drying period
Cover, which is characterized in that water cooling partition wall I, water cooling partition wall II and the water cooling partition wall III is made of refractory brick, whole wide
Degree is 500, and length is of same size with grate.
6. a kind of grate heat patching method of suitable iron ore concentrate production, characterized in that it comprises the following steps:
1) water cooling partition wall I is set between blasting drying period and down-draft drying zone, it is dry between I sections of grate preheating in exhausting
If water cooling partition wall II, I sections are preheated in grate and grate preheats and water cooling partition wall III is arranged between II sections, by partition wall pedestal two sides
Anchor studs are welded, and falls to beat castable and is fixed on grate top, partition wall pedestal top and partition wall cooling water pipe are welded into one
Whole, the height of water cooling partition wall is identical as grate upper cover height；
2) it is equipped with the concurrent heating mechanism to down-draft drying zone concurrent heating in water cooling partition wall I, is equipped in water cooling partition wall II to grate
The concurrent heating mechanism I for preheating I sections of concurrent heatings is equipped with the concurrent heating mechanism II that II sections of concurrent heatings are preheated to grate, water in water cooling partition wall III
The setting identical as pelletizing traffic direction in grate of the concurrent heating jet expansion direction of concurrent heating mechanism in cold shut wall I, and be embedded in
In water cooling partition wall I, the concurrent heating of the concurrent heating mechanism in the concurrent heating nozzle and water cooling partition wall III of the concurrent heating mechanism in water cooling partition wall II is sprayed
Pelletizing traffic direction is oppositely arranged in the export direction and grate of mouth, and is embedded in water cooling partition wall II and water cooling partition wall III respectively
It is interior；
3) when the air themperature in grate blasting drying period upper cover 1 is lower than 100 DEG C, the combustion gas control in concurrent heating mechanism I is opened
Valve and air shut-off valve processed are done grate air blast by carrying out concurrent heating to grate blasting drying period with concurrent heating concurrent heating nozzle
Dry section is increased to 110 DEG C；
4) grate preheats hot-air in I sections of upper covers and comes from 2 sections of ring cold machine, when producing bloodstone or limonite, preheats in I section
It when case temperature is lower than 600 DEG C, opens I sections of preheating and carries out concurrent heating with concurrent heating concurrent heating nozzle 9, case temperature in preheating I section is mentioned
Up to 600 DEG C；
5) grate preheats hot fume in II sections of upper covers and comes from rotary kiln, when producing bloodstone or limonite, preheats II
It when case temperature is lower than 1000 DEG C in section, opens I sections of preheating and carries out concurrent heating with concurrent heating concurrent heating nozzle, by temperature in II sections of upper covers of preheating
Degree is improved to 1000 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910952654.7A CN110484718B (en) | 2019-10-09 | 2019-10-09 | Chain grate machine heat supplementing system and method suitable for iron ore concentrate production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910952654.7A CN110484718B (en) | 2019-10-09 | 2019-10-09 | Chain grate machine heat supplementing system and method suitable for iron ore concentrate production |
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| CN110484718A true CN110484718A (en) | 2019-11-22 |
| CN110484718B CN110484718B (en) | 2024-04-23 |
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| WO2010007849A1 (en) * | 2008-07-16 | 2010-01-21 | 株式会社神戸製鋼所 | Method for producing iron ore pellets |
| CN108332562A (en) * | 2018-03-27 | 2018-07-27 | 中冶北方（大连）工程技术有限公司 | Grate preheating section concurrent heating system |
| CN110157903A (en) * | 2019-06-05 | 2019-08-23 | 中冶北方（大连）工程技术有限公司 | A kind of cooling waste gas recovery of pellet utilizes system and application method |
| CN210481468U (en) * | 2019-10-09 | 2020-05-08 | 中冶北方（大连）工程技术有限公司 | Chain grate machine concurrent heating system that is fit for iron ore concentrate production |
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2019
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| WO2010007849A1 (en) * | 2008-07-16 | 2010-01-21 | 株式会社神戸製鋼所 | Method for producing iron ore pellets |
| CN101624647A (en) * | 2009-08-04 | 2010-01-13 | 武汉钢铁(集团)公司 | Pellet roasting production technology recycling residual heat and system thereof |
| CN108332562A (en) * | 2018-03-27 | 2018-07-27 | 中冶北方（大连）工程技术有限公司 | Grate preheating section concurrent heating system |
| CN110157903A (en) * | 2019-06-05 | 2019-08-23 | 中冶北方（大连）工程技术有限公司 | A kind of cooling waste gas recovery of pellet utilizes system and application method |
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| CN110484718B (en) | 2024-04-23 |
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