CN110484718B - Chain grate machine heat supplementing system and method suitable for iron ore concentrate production - Google Patents
Chain grate machine heat supplementing system and method suitable for iron ore concentrate production Download PDFInfo
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- CN110484718B CN110484718B CN201910952654.7A CN201910952654A CN110484718B CN 110484718 B CN110484718 B CN 110484718B CN 201910952654 A CN201910952654 A CN 201910952654A CN 110484718 B CN110484718 B CN 110484718B
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 109
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000012141 concentrate Substances 0.000 title claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 144
- 238000001816 cooling Methods 0.000 claims abstract description 97
- 238000001035 drying Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 35
- 238000007605 air drying Methods 0.000 claims description 23
- 239000008188 pellet Substances 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 18
- 238000002485 combustion reaction Methods 0.000 claims description 13
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 11
- 229910052595 hematite Inorganic materials 0.000 claims description 11
- 239000011019 hematite Substances 0.000 claims description 11
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000011449 brick Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 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 invention relates to a chain grate machine heat supplementing system and a method suitable for iron ore concentrate production, comprising a water-cooling partition wall I arranged between an air blast drying section and an air suction drying section, a water-cooling partition wall II arranged between the air suction drying section and a chain grate machine preheating section I and a water-cooling partition wall III arranged between the chain grate machine preheating section I and the chain grate machine preheating section II. The novel heat supplementing mode not only can supplement heat to the upper cover of the air blast drying section through the built-in heat supplementing nozzle under the condition of not losing the hot air heat and the air quantity of the air draft drying section or the air blast drying section, and can control the temperature in the upper cover of the air blast drying section, but also can prevent the mechanical part of the chain grate from being baked at high temperature for a long time, thereby prolonging the service life of the chain grate.
Description
Technical Field
The invention relates to the technical field of pellet ore production, in particular to a chain grate heat supplementing system and method suitable for iron ore concentrate production.
Background
Iron concentrates are typically magnetite, hematite, limonite in pellet production processes, while grate heat compensation processes are often applied to hematite and limonite. The chain grate machine is generally divided into a forced air drying section, an induced draft drying section, a preheating section I and a preheating section II according to a thermal system, wherein hot air required by the forced air drying section is from a third section of the annular cooler at about 250 ℃, hot smoke required by the induced draft drying section is from a second section of the chain grate machine preheating section at about 450 ℃, hot smoke required by the preheating section I is from a second section of the annular cooler at about 600 ℃, and hot smoke required by the preheating section II is from the kiln tail of the rotary kiln at about 1000 ℃.
The magnetite contains a certain amount of FeO, the FeO generates oxidation exothermic reaction in the preheating sections I and II of the chain grate machine, and the heat released in the reaction meets the production requirement of the magnetite, so that the preheating sections I and II do not need to be subjected to additional heat compensation in the process of producing the magnetite chain grate machine.
The hematite and limonite have low FeO content, and heat cannot be obtained through FeO oxidation heat release in the preheating I and II sections, so that when the hematite and limonite are produced, the preheating I and II sections of the chain grate machine are required to be subjected to heat supplementing operation.
In the prior art, the heat supplementing method is to install auxiliary heat supplementing nozzles on the side walls of the preheating sections I and II of the grate machine, and supplement heat of the preheating sections I and II of the grate machine through heat generated by burning high-calorific-value coal gas. The method has the advantages of simple structure, easy installation and easy maintenance. Because the chain grate preheats the hot flue gas in the I and II sections of the upper covers and adopts an air draft mode, the hot flue gas passes through the pellets from the upper covers and enters the bellows. The auxiliary heat supplementing nozzle of the preheating section is arranged on the side wall of the upper cover, and flames generated by auxiliary combustion arranged on the opposite side cannot reach the center of the upper cover of the chain grate machine due to the influence of downward exhaust, so that the flames burn downwards. Hazard of this combustion phenomenon: 1. the temperature field in the upper cover of the preheating section is uneven, the center temperature is low, the temperatures of the two sides are high, and the overall strength and quality of the pellets are seriously affected; 2. as the fire is baked at high temperature for a long time, mechanical equipment at two sides of the upper cover can be seriously deformed and run over, and the grate plate and the side wall steel structure of the grate machine can be seriously burnt, so that serious production accidents are caused.
The hot air of the blast drying section is provided by the annular cooler section, and the hot air penetrates through the pellet layer from bottom to top in a blast mode, so that the pellet drying effect is achieved. The cooled air is discharged to the atmosphere through a pipeline, a dust remover and a fan. The temperature of the cooled air is generally about 80 ℃ lower, and the air also contains a certain amount of water, if the low-temperature wet air is not subjected to complementary heat treatment, the pipeline, the dust remover and the fan are damaged, and emergency shutdown is caused in severe cases.
In the prior art, in order to supplement the low-temperature wet air discharged from the hot blast drying section, the hot air in the air draft drying section is generally adopted to supplement the hot air at about 400 ℃ or the hot air which does not enter the chain grate machine blast drying section is generally adopted to supplement the hot air at about 250 ℃. The hot air in the exhaust drying section is adopted for supplementing heat, and the defect is that the temperature of the hot air after supplementing heat is generally higher than 200 ℃, and the hot air also causes damage to a dust remover and a fan. And the air quantity of a part of the air suction drying section is adopted, so that the working air quantity of the air suction drying section is reduced, and the thermal system of the air suction drying section is influenced. The hot air of the forced air drying section is adopted for supplementing heat, and the defect is that the working air quantity of the forced air drying section is reduced by adopting the air quantity of part of the forced air drying section, so that the thermal system of the forced air drying section is influenced.
Disclosure of Invention
The invention aims to provide a chain grate machine heat supplementing system and a process suitable for iron ore concentrate production.
The aim of the invention is achieved by the following technical scheme.
The invention relates to a chain grate machine heat supplementing system suitable for iron ore concentrate production, which comprises a chain grate machine blast drying section upper cover, a chain grate machine exhaust drying section upper cover, a chain grate machine preheating section upper cover, a water-cooling partition wall I arranged between the blast drying section and the exhaust drying section, a water-cooling partition wall II arranged between the exhaust drying section and the chain grate machine preheating section I, and a water-cooling partition wall III arranged between the chain grate machine preheating section I and the chain grate machine preheating section II, and is characterized in that a heat supplementing mechanism I for supplementing heat to the blast drying section is arranged in the water-cooling partition wall I, a heat supplementing mechanism II for supplementing heat to the chain grate machine preheating section I is arranged in the water-cooling partition wall II, a heat supplementing mechanism III for supplementing heat to the chain grate machine preheating section II is arranged in the water-cooling partition wall III,
The three heat supplementing mechanisms are composed of ceramic sleeves pre-buried in the three water-cooling partition walls, cooling water pipes arranged on the outer sides of the ceramic sleeves, a gas pipeline and a combustion air pipeline which are arranged in the ceramic sleeves, and heat supplementing nozzles which are connected with the gas pipeline and the combustion air pipeline and pre-buried on the central line of the water-cooling partition walls, wherein a gas control valve and an air control valve are respectively arranged on the gas pipeline and the combustion air pipeline;
The outlet direction of the heat compensating nozzle in the water cooling partition wall I is the same as the running direction of the pellets in the chain grate, and the outlet directions of the heat compensating nozzle in the water cooling partition wall II and the heat compensating nozzle in the water cooling partition wall III are opposite to the running direction of the pellets in the chain grate.
Further, the installation height of the heat supplementing nozzle is 1000mm away from the top of the upper cover of the chain grate machine, and the horizontal direction of the heat supplementing nozzle is consistent with the central line of the chain grate machine.
Further, the water-cooling partition wall I constitute by partition wall base, partition wall body and the partition wall condenser tube that sets up between partition wall base and partition wall body, water-cooling partition wall II and water-cooling partition wall III and water-cooling partition wall I structure the same.
Further, the partition wall base comprises four angle steels, the partition wall cooling water pipe is welded on the partition wall base comprising four angle steels, and an anchoring piece is arranged on the partition wall cooling water pipe and used for embedding the partition wall cooling water pipe at the lower part of the partition wall.
Further, the water-cooling partition wall I, the water-cooling partition wall II and the water-cooling partition wall III are built by refractory bricks, the whole width is 500mm, and the length is the same as the width of the chain grate.
The invention relates to a chain grate machine heat supplementing method suitable for iron ore concentrate production, which is characterized by comprising the following steps of:
1) A water-cooling partition wall I is arranged between the forced air drying section and the induced air drying section, a water-cooling partition wall II is arranged between the induced air drying section and the chain grate preheating section I, a water-cooling partition wall III is arranged between the chain grate preheating section I and the chain grate preheating section II, anchor nails are welded on two sides of a partition wall base, pouring casting materials are fixed on the upper part of the chain grate, the upper part of the partition wall base and a partition wall cooling water pipe are welded into a whole, and the height of the water-cooling partition wall is the same as that of an upper cover of the chain grate;
2) The water cooling partition wall I is internally provided with a heat supplementing mechanism I for supplementing heat to the blast drying section, the water cooling partition wall II is internally provided with a heat supplementing mechanism II for supplementing heat to the preheating section I of the chain grate machine, the water cooling partition wall III is internally provided with a heat supplementing mechanism III for supplementing heat to the preheating section II of the chain grate machine, the outlet direction of a heat supplementing nozzle I of the heat supplementing mechanism I in the water cooling partition wall I is the same as the running direction of pellets in the chain grate machine, the device is embedded in a water-cooling partition wall I, and the outlet direction of a heat supplementing nozzle II of a heat supplementing mechanism II in the water-cooling partition wall II and the outlet direction of a heat supplementing nozzle III of a heat supplementing mechanism III in the water-cooling partition wall III are opposite to the running direction of pellets in a chain grate machine and are respectively embedded in the water-cooling partition wall II and the water-cooling partition wall III;
3) When the temperature of air in the upper cover of the forced air drying section of the chain grate machine is lower than 100 ℃, a gas control valve and an air control valve on a heat supplementing mechanism I are opened, and heat is supplemented to the forced air drying section of the chain grate machine by using a heat supplementing nozzle I, so that the forced air drying section of the chain grate machine is improved to 110 ℃;
4) When the temperature in the upper cover of the preheating section I is lower than 600 ℃ during the production of hematite or limonite, the preheating section I is started to be supplemented by a supplementing nozzle II, and the temperature in the upper cover of the preheating section I is increased to 600 ℃;
5) When the temperature in the upper cover of the preheating II section is lower than 1000 ℃ during the production of hematite or limonite, the preheating II section is started to carry out heat compensation by a heat compensation nozzle III, and the temperature in the upper cover of the preheating II section is increased to 1000 ℃.
The invention has the advantages that:
because the invention embeds the heat-supplementing nozzle in the water-cooling partition wall, the fuel gas is burnt in the upper cover of the grate machine through the heat-supplementing nozzle pre-embedded in the water-cooling partition wall. The water cooling partition wall is arranged in the upper cover of the chain grate machine, the heat supplementing nozzle is pre-buried on the central line of the water cooling partition wall (also the central line of the chain grate machine), and flame generated by the combustion of the heat supplementing nozzle is parallel to the running direction of the pellets of the chain grate machine (the length direction of the chain grate machine). As the flame burns on the central line of the grate, the air box suction force has little influence on the flame. The fuel gas is fully combusted in the upper cover of the grate machine, so that the strength of the pellets is homogenized, and the service life of mechanical equipment is prolonged.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of the water-cooled partition wall.
Fig. 3 is a view in the direction a of fig. 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figures 1-3, the chain grate heat supplementing system suitable for iron ore concentrate production comprises a chain grate air blast drying section upper cover 1, a chain grate induced draft drying section upper cover 2, a chain grate preheating I section upper cover 3, a chain grate preheating II section upper cover 4, a water cooling partition wall I5 arranged between the air blast drying section and the air draft drying section, a water cooling partition wall II 6 arranged between the air draft drying section and the chain grate preheating I section and a water cooling partition wall III 7 arranged between the chain grate preheating I section and the chain grate preheating II section, and is characterized in that a heat supplementing mechanism I for supplementing heat to the air blast drying section is arranged in the water cooling partition wall I5, a heat supplementing mechanism II for supplementing heat to the chain grate preheating I section is arranged in the water cooling partition wall II 6, a heat supplementing mechanism III for supplementing heat to the chain grate preheating II section is arranged in the water cooling partition wall III 7,
The three heat supplementing mechanisms consist of ceramic sleeves 11 pre-buried in the three water-cooling partition walls, cooling water pipes 12 arranged outside the ceramic sleeves 11, a gas pipeline 13 and a combustion air pipeline 14 arranged in the ceramic sleeves 11, and heat supplementing nozzles connected with the gas pipeline and the combustion air pipeline and pre-buried on the central line of the water-cooling partition walls, wherein a gas control valve and an air control valve are respectively arranged on the gas pipeline 13 and the combustion air 14 pipeline;
The outlet direction of the heat compensating nozzle I81 in the water-cooling partition wall I5 is the same as the running direction of the pellets in the chain grate, and the outlet directions of the heat compensating nozzle II 82 in the water-cooling partition wall II 6 and the heat compensating nozzle III 83 in the water-cooling partition wall III are opposite to the running direction of the pellets in the chain grate.
The installation height of each heat supplementing nozzle is 1000mm away from the top of the upper cover of the chain grate machine, and the horizontal direction of each heat supplementing nozzle is consistent with the central line of the chain grate machine.
The water-cooling partition wall I consists of a partition wall base 51, a partition wall body 54 and a partition wall cooling water pipe 52 arranged between the partition wall base 51 and the partition wall body 54, wherein the partition wall base 51 consists of four angle steels, the partition wall cooling water pipe 52 is welded on the partition wall base 51 consisting of four angle steels, an anchoring piece 53 is arranged on the partition wall cooling water pipe 52 and used for embedding the partition wall cooling water pipe 52 at the lower part of the partition wall, and the water-cooling partition wall II 6 and the water-cooling partition wall III 7 have the same structure as the water-cooling partition wall I5.
The water-cooling partition wall I, the water-cooling partition wall II and the water-cooling partition wall III are built by refractory bricks, the whole width is 500mm, and the length is the same as the width of the chain grate.
The invention relates to a chain grate machine heat supplementing method suitable for iron ore concentrate production, which is characterized by comprising the following steps of:
1) A water-cooling partition wall I5 is arranged between the forced air drying section and the induced air drying section, a water-cooling partition wall II 6 is arranged between the induced air drying section and the chain grate preheating section I, a water-cooling partition wall III 7 is arranged between the chain grate preheating section I and the chain grate preheating section II, anchor nails are welded on two sides of a partition wall base 51, pouring materials are poured and fixed on the upper part of the chain grate, the upper part of the partition wall base 51 and a partition wall cooling water pipe 52 are welded into a whole, and the height of the water-cooling partition wall 51 is the same as that of an upper cover of the chain grate;
2) The water cooling partition wall I5 is internally provided with a heat supplementing mechanism I for supplementing heat to the forced air drying section, the water cooling partition wall II 6 is internally provided with a heat supplementing mechanism II for supplementing heat to the preheating I section of the chain grate machine, the water cooling partition wall III 7 is internally provided with a heat supplementing mechanism III for supplementing heat to the preheating II section of the chain grate machine, the outlet direction of a heat supplementing nozzle I81 of the heat supplementing mechanism I in the water cooling partition wall I5 is the same as the running direction of pellets in the chain grate machine, the heat supplementing mechanism I is embedded in the water cooling partition wall I, the outlet directions of a heat supplementing nozzle II 82 of the heat supplementing mechanism II in the water cooling partition wall II 6 and a heat supplementing nozzle III 83 of the heat supplementing mechanism III in the water cooling partition wall III 3 are opposite to the running direction of pellets in the chain grate machine, and the heat supplementing mechanism I81 and the heat supplementing nozzles are respectively embedded in the water cooling partition wall II 6 and the water cooling partition wall III 7;
3) In actual production, when the temperature of air in the upper cover 1 of the air blast drying section of the chain grate machine is lower than 100 ℃, a gas control valve and an air control valve on a heat supplementing mechanism I are opened, and the temperature of the air blast drying section of the chain grate machine is increased to 110 ℃ by supplementing heat to the air blast drying section of the chain grate machine by using a heat supplementing nozzle I81;
No matter what kind of raw materials are adopted in the pellet mill, the heat supplementing design is indispensable to the upper cover of the blast drying section. But the air draft drying section: because the hot flue gas of the exhaust drying section comes from the preheating section II, the flue gas quantity or the flue gas temperature can meet the production of various raw materials, and a heat supplementing nozzle is not required to be designed in the exhaust drying section.
4) Preheating section I of the chain grate: a preheating I section heat supplementing nozzle II 82 is arranged on a water cooling partition wall II 6 between the pumping and preheating I sections, a ceramic sleeve 11 is arranged outside the preheating I section heat supplementing nozzle 82, and a cooling water pipe 12 is arranged around the ceramic sleeve 11. The outlet direction of the preheating I section heat supplementing nozzle I81 is the same as the running direction of pellets in the grate machine, and flame generated by the heat supplementing nozzle I81 burns along the length direction of the upper cover 1 of the blast drying section of the grate machine, so that the influence of the pressure of air boxes at two sides of the grate machine on the flame is small. When hematite or limonite is produced, when the temperature in the upper cover of the preheating I section is lower than 600 ℃, the preheating I section is started to be supplemented by a supplementing heat nozzle II 82, and the temperature in the upper cover of the preheating I section is increased to 600 ℃; in actual production, hot air in the upper cover of the preheating section I of the chain grate machine comes from the section 2 of the circular cooler, and when hematite or limonite is produced, if the temperature in the upper cover does not meet the production requirement, the preheating section I is started to be supplemented with heat by a heat supplementing nozzle II 82.
5) When the temperature in the upper cover of the preheating II section is lower than 1000 ℃ during the production of hematite or limonite, the preheating I section is started to supplement heat by a supplementing nozzle III 83, and the temperature in the upper cover of the preheating II section is increased to 1000 ℃.
The gas control valve and the air control valve and the chain which are arranged on the gas pipeline 13 and the combustion air 14 pipeline
The automatic control system of the grate is connected, and the exhaust gas temperature of the upper cover of the blast drying section can be arbitrarily regulated by controlling the gas quantity. The novel heat supplementing mode not only can supplement heat for the upper cover of the air blast drying section through the built-in heat supplementing nozzle under the condition of not losing the heat and air quantity of the hot air in the air draft drying section or the air blast drying section, but also can control the temperature in the upper cover of the air blast drying section, thereby protecting the subsequent pipelines and equipment of the upper cover of the air blast drying section; meanwhile, the mechanical part of the chain grate machine can be prevented from being baked at high temperature for a long time, so that the service life of the chain grate machine is prolonged.
Claims (6)
1. The chain grate machine heat supplementing system suitable for iron ore concentrate production comprises a chain grate machine blast drying section upper cover, a chain grate machine exhaust drying section upper cover, a chain grate machine preheating section upper cover, a water cooling partition wall I arranged between the blast drying section and the exhaust drying section, a water cooling partition wall II arranged between the exhaust drying section and the chain grate machine preheating section I, and a water cooling partition wall III arranged between the chain grate machine preheating section I and the chain grate machine preheating section II, and is characterized in that a heat supplementing mechanism I for supplementing heat to the blast drying section is arranged in the water cooling partition wall I, a heat supplementing mechanism II for supplementing heat to the chain grate machine preheating section I is arranged in the water cooling partition wall II, a heat supplementing mechanism III for supplementing heat to the chain grate machine preheating section II is arranged in the water cooling partition wall III,
The three heat supplementing mechanisms are composed of ceramic sleeves pre-buried in the three water-cooling partition walls, cooling water pipes arranged on the outer sides of the ceramic sleeves, a gas pipeline and a combustion air pipeline which are arranged in the ceramic sleeves, and heat supplementing nozzles which are connected with the gas pipeline and the combustion air pipeline and pre-buried on the central line of the water-cooling partition walls, wherein a gas control valve and an air control valve are respectively arranged on the gas pipeline and the combustion air pipeline;
The outlet direction of the heat compensating nozzle in the water cooling partition wall I is the same as the running direction of the pellets in the chain grate, and the outlet directions of the heat compensating nozzle in the water cooling partition wall II and the heat compensating nozzle in the water cooling partition wall III are opposite to the running direction of the pellets in the chain grate.
2. The heat compensating system for the chain grate machine, which is suitable for producing iron ore concentrate, comprises an upper cover of a forced air drying section of the chain grate machine, and is characterized in that the mounting height of the heat compensating nozzle is 1000mm away from the top of the upper cover of the chain grate machine, and the mounting height of the heat compensating nozzle is consistent with the central line of the chain grate machine in the horizontal direction.
3. The chain grate machine heat compensating system suitable for iron ore concentrate production according to claim 1, comprising an upper cover of a chain grate machine blast drying section, wherein the water-cooled partition wall I consists of a partition wall base, a partition wall body and a partition wall cooling water pipe arranged between the partition wall base and the partition wall body, and the water-cooled partition wall II and the water-cooled partition wall III have the same structure as the water-cooled partition wall I.
4. The heat compensating system of grate machine suitable for iron ore concentrate production of claim 3, comprising an upper cover of the blast drying section of the grate machine, wherein the partition wall base consists of four angle steels, the partition wall cooling water pipe is welded on the partition wall base consisting of four angle steels, and the partition wall cooling water pipe is provided with an anchor for embedding the partition wall cooling water pipe at the lower part of the partition wall.
5. The chain grate machine heat compensating system suitable for iron ore concentrate production according to claim 3, comprising an upper cover of a chain grate machine blast drying section, wherein the water cooling partition wall I, the water cooling partition wall II and the water cooling partition wall III are built by refractory bricks, the whole width is 500mm, and the length is the same as the width of the chain grate machine.
6. A chain grate machine heat supplementing method suitable for iron ore concentrate production is characterized by comprising the following steps:
1) A water-cooling partition wall I is arranged between the forced air drying section and the induced air drying section, a water-cooling partition wall II is arranged between the induced air drying section and the chain grate preheating section I, a water-cooling partition wall III is arranged between the chain grate preheating section I and the chain grate preheating section II, anchor nails are welded on two sides of a partition wall base, pouring casting materials are fixed on the upper part of the chain grate, the upper part of the partition wall base and a partition wall cooling water pipe are welded into a whole, and the height of the water-cooling partition wall is the same as that of an upper cover of the chain grate;
2) The water cooling partition wall I is internally provided with a heat supplementing mechanism I for supplementing heat to the blast drying section, the water cooling partition wall II is internally provided with a heat supplementing mechanism II for supplementing heat to the preheating section I of the chain grate machine, the water cooling partition wall III is internally provided with a heat supplementing mechanism III for supplementing heat to the preheating section II of the chain grate machine, the outlet direction of a heat supplementing nozzle I of the heat supplementing mechanism in the water cooling partition wall I is the same as the running direction of pellets in the chain grate machine, the device is embedded in a water-cooling partition wall I, and the outlet direction of a heat supplementing nozzle II of a heat supplementing mechanism II in the water-cooling partition wall II and the outlet direction of a heat supplementing nozzle III of a heat supplementing mechanism III in the water-cooling partition wall III are opposite to the running direction of pellets in a chain grate machine and are respectively embedded in the water-cooling partition wall II and the water-cooling partition wall III;
3) When the temperature of air in the upper cover of the forced air drying section of the chain grate machine is lower than 100 ℃, a gas control valve and an air control valve on a heat supplementing mechanism I are opened, and heat is supplemented to the forced air drying section of the chain grate machine by using a heat supplementing nozzle I, so that the forced air drying section of the chain grate machine is improved to 110 ℃;
4) When the temperature in the upper cover of the preheating section I is lower than 600 ℃ during the production of hematite or limonite, the preheating section I is started to be supplemented by a supplementing nozzle II, and the temperature in the upper cover of the preheating section I is increased to 600 ℃;
5) When the temperature in the upper cover of the preheating II section is lower than 1000 ℃ during the production of hematite or limonite, the preheating II section is started to carry out heat compensation by a heat compensation nozzle III, and the temperature in the upper cover of the preheating II section is increased to 1000 ℃.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110484718A CN110484718A (en) | 2019-11-22 |
| CN110484718B true CN110484718B (en) | 2024-04-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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