CN111100981A - Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter - Google Patents
Method for improving metallurgical performance of manganese-rich slag smelted manganese sinter Download PDFInfo
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- CN111100981A CN111100981A CN201911375171.1A CN201911375171A CN111100981A CN 111100981 A CN111100981 A CN 111100981A CN 201911375171 A CN201911375171 A CN 201911375171A CN 111100981 A CN111100981 A CN 111100981A
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- 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
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- 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
- C22B1/214—Sintering; Agglomerating in shaft furnaces
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
- C22B1/22—Sintering; Agglomerating in other sintering apparatus
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- 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
- C22B47/00—Obtaining manganese
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- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
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- 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
Abstract
The invention discloses a method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter, which comprises the following steps: the method is characterized in that low-manganese high-iron powder ore and fly ash are blended and then treated, the treated raw material is added into a manganese-rich slag furnace for smelting manganese-rich slag, and manganese sinter ore or manganese ore pellets are sintered through a belt conveyor or a shaft furnace, so that the physical and chemical indexes of the large-volume manganese-rich slag furnace sinter ore are solved, the utilization rate of the manganese-rich slag furnace sinter ore is improved, the bottleneck that the ratio of manganese ore sintering of the manganese-rich slag furnace increases furnace condition nodulation is solved, and meanwhile, the sintering reutilization of the manganese-poor powder ore is developed and utilized. In actual use, the method can consume a large amount of low-manganese high-iron fine ores and a large amount of dust, not only can bring great economic benefits to enterprises, but also has obvious effect of recycling resources, simultaneously reduces the treatment difficulty of the dust and reduces the pollution to the environment.
Description
Technical Field
The invention relates to the field of manganese-rich slag smelting, in particular to a method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter.
Background
The capacity of the manganese-rich slag furnace in China is not very large, and is mostly 20-50m 3. The charging material structure mainly uses low-manganese high-iron manganese oxide ore, the usage amount of manganese sintering ore is less than 20-30% on average, along with the continuous expansion of the production scale of domestic silicomanganese alloy ore-heating furnaces, the shortage of imported manganese ore resources and domestic manganese ore mainly use low-manganese high-iron high-aluminum ore, the manganese-rich slag fire enrichment smelting process is more important, but the manganese-rich slag furnace only depends on poor manganese lump ore at present, so that a large amount of poor-manganese iron powder ore (0-6mm) is stored, and the dust can not be completely reused, so that the resource waste is caused. The manganese-rich slag furnace is not unwilling to use manganese sinter by enterprises, but frequent material collapse occurs in the manganese-rich slag furnace with the capacity of more than 100m3 due to poor strength of the manganese sinter, poor metallurgical property, overlarge addition ratio, slightly long forward cycle maintained by a small furnace, and finally nodulation at the middle lower part of the furnace body. The manganese sinter adopted at present has the following problems:
(1) the grade of manganese ore sintered iron is low, the natural alkalinity (R3 ≦ 0.3) of silicon dioxide is relatively high (14-18%), the content of ferrous oxide (FeO) is high (16-19%), and the strength of sintered ore is poor. When the sinter ore dosage is larger (more than 50 percent), the furnace temperature fluctuation is larger, and the lower part in the manganese-rich slag furnace is easy to be thickened and even nodulated;
(2) the manganese-rich slag smelted in the blast furnace has large slag quantity, poor sintered ore strength of main raw materials entering the furnace, poor air permeability and liquid permeability in the furnace, mainly aiming at development edges of process operation systems, deviating a coal gas curve to be in a steamed bread shape, moving up a soft melting zone root, and easily generating furnace wall thickening and nodulation when the thermal stability of furnace slag is poor or the furnace condition is difficult to operate;
(3) compared with an iron ore sintering structure, the manganese ore sintering has the characteristics of large burning loss, high heat consumption, narrow softening temperature range, small loose density, good air permeability, low product strength, large ore return rate and the like, and the mechanism of the manganese ore sintering is basically the same as that of the iron ore sintering. I.e. binding the mineral particles mainly by the liquid phase produced during sintering. A sintered ore layer, a combustion layer, a preheating layer, a drying layer and an over-wet layer sequentially appear from top to bottom;
(4) the manganese sintering ore is of natural alkalinity, MnO decomposed during the sintering of manganese ore has strong affinity to oxygen, and the MnO and SiO2 can easily form a stable silicate liquid phase. In the sintering process, a liquid phase with low melting point, low viscosity and good fluidity is generated, the burning loss is large, the internal water is high, and a macroporous thin-walled sinter ore structure is easy to form. Therefore, when the liquid phase strength is weaker than the iron ore structure during the sintering of manganese ore, it is desired to avoid the overcooling of the sintered ore.
Therefore, with the continuous expansion of the production scale of the silicon-manganese alloy in China, the more the demand of the ore-smelting furnace for smelting high-quality silicon-manganese alloy for rich manganese ore is. At present, the charging materials of the manganese-rich slag furnace almost completely use high-iron manganese lump ores, but the storage amount of high-iron manganese powder ore accounts for about 42 percent of the proportion of the high-iron manganese ore, the proportion of the manganese-rich slag furnace is only maintained at 20-30 percent due to poor physical and chemical indexes of manganese ore sintering, the high-iron low-manganese powder ore cannot be completely and comprehensively utilized, and the manganese sintered ore or manganese ore pellets belong to clinker, if the proportion is increased to more than 60 percent, the load of the manganese-rich slag furnace can be increased, the coke is saved by more than 15 percent, and the cost is reduced by about 15 percent. Therefore, only by solving the secondary sintering process technology of the poor ferromanganese fine ore and the fly ash and ensuring the physicochemical metallurgical performance index of the manganese sintered ore, the pyrometallurgical enrichment smelting technology of the manganese-rich slag furnace can really play the original purpose of resource utilization of the poor ferromanganese ore and has the significance of promoting the real development of the manganese-rich slag industry.
Disclosure of Invention
The invention solves the problems that the demand of high-quality silicomanganese alloy for rich manganese ore is more and more increased during smelting by an ore-smelting furnace in the prior art, the rich ore accounts for about 5 percent of the storage capacity of manganese ore resources in China, and the poor manganese ore or ferro-manganese ore exists mostly, provides a method for improving the metallurgical property of manganese-rich slag smelting manganese sinter, and improves the strength and the metallurgical property of artificial rich manganese ore through reasonable proportioning and process improvement during application, thereby solving the bottleneck that the ratio of manganese ore sintering of a manganese-rich slag furnace with the thickness of more than 200m3 increases the furnace condition nodulation, and developing and utilizing the sintering reutilization of the poor manganese powder ore.
The invention is realized by the following technical scheme:
a method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter is characterized by comprising the following steps: the low-manganese high-iron fine ore and the fly ash are mixed and then treated, and the treated raw materials are added into a manganese-rich slag furnace for smelting manganese-rich slag.
Further, the method for improving the metallurgical performance of the manganese-rich slag smelted manganese sinter comprises the steps of sintering the raw materials by adopting a belt type sintering machine, controlling the ignition temperature to be 900-1100 ℃ and the ignition time to be 60S, controlling the temperature of a high-temperature combustion zone to be 1250 ℃ and the sintering time to be 90S during sintering, wherein the effective components in the raw materials are controlled as follows: SiO2/AL2O3 ≧ 4(SiO2 ≧ 12-15%), MnO/FeO ≧ 0.5, and the particle size grading requirements of the raw materials and the fuel are: and the mineral powder is 0-10mm and the coke powder is 0-3mm, after sintering is completed, the mineral powder is crushed by a crusher and then enters a hot sieve, small particles below the sieve are returned for retreatment, the part above the sieve enters a cooler for cooling, the part below the sieve is cooled and then enters a cold sieve, the part below the sieve is returned for retreatment, and the oversize material is used for smelting the manganese-rich slag.
Further, the method for improving the metallurgical performance of the manganese-rich slag smelted manganese sinter comprises the following steps of: 8 to 10 percent.
Further, the method for improving the metallurgical performance of manganese-rich slag smelted manganese sinter comprises the steps that the ignition depth in the belt sintering process is 60% of the thickness of a combustion zone, the thickness of the sintering zone is 40mm, and for manganese powder ore, the thickness of the sintering zone is 25-35 mm.
Further, the method for improving the metallurgical performance of the manganese-rich slag smelted manganese sinter comprises the following steps of cooling for more than 10 minutes, controlling the temperature of the cooled ore to be 250-300 ℃, and controlling the temperature of the red ore at the tail of the cooling machine to be: more than 500-600 ℃.
Further, the raw material blending processing method adopts a shaft furnace process to produce low-manganese high-iron powder ore and fly ash into manganese oxide ore pellets, and the process flow is as follows: firstly, raw materials are uniformly mixed and dried, manganese ore powder particles are subjected to size lubrication grinding to 200 meshes by using a high-efficiency lubrication grinding machine, then pelletizing is carried out, then the particles are sieved by a round roller, 8-16mm of particles are conveyed into a shaft furnace by a material distribution trolley to be roasted, and the particles enter a belt cooler to be cooled after passing through a cooling section in the furnace and then are put into a finished product bin for use.
Furthermore, the method for improving the metallurgical performance of the manganese-rich slag smelted manganese sinter is characterized in that the dust removal dust is blast furnace gas ash recovered from a manganese-rich slag furnace gas system, the dust removal dust mainly comprises mineral powder, coke powder and a small amount of limestone powder, and the carbon-containing furnace dust can be used as a sintering raw material.
At present, the capacity of a manganese-rich slag furnace in China is not very large, the capacity is mostly 20-50m3, the structure of a charging material is mainly low-manganese high-iron manganese oxide ore, the usage amount of manganese sinter ore is less than 20-30% on average, along with the continuous expansion of the production scale of a domestic silicomanganese ore heating furnace, the domestic manganese ore in shortage of imported manganese ore resources is mainly low-manganese high-iron high-aluminum ore, the manganese-rich slag pyrometallurgy enrichment smelting process is more important, but the manganese-rich slag furnace only depends on poor-manganese lump ore at present, so that a large amount of poor-manganese iron powder ore (0-6mm) is stored, and meanwhile, the dedusting ash can not be fully reused, so that the resource waste is caused, therefore, the method for improving the metallurgical performance of the manganese-rich slag smelting ore is provided, the manganese ore powder is generally selected from ore dressing and offline and has the particle size of more than 0mm by matching different grain sizes of high-iron low-manganese ore at home and abroad, because the manganese-rich slag furnace requires that manganese ore is sintered to be natural alkalinity, and solvents such as lime and the like cannot be added, the process link of a granulating cylinder can be cancelled when the sintering machine is designed, so that the more proper particle size of manganese ore sintering is 0-10 mm; the particle size is too coarse, the air permeability of a material layer is too high, and the heat taken away by air is too much, so that the coarse particle size is only sintered on the surface, and the loose strength of the sinter is extremely poor. The fuel added into the sintering mixture ensures that the time of reaching 1250 ℃ in a high-temperature combustion zone is about 90S so as to completely sinter the manganese powder ore. The particle size of the fuel is controlled to be 0-3 mm. The granularity is too fine, and the high-temperature retention time is insufficient; if the particle size is too coarse, a large number of local reduction zones are formed, the high-temperature retention time is prolonged, the combustion zone is enlarged, and the particle bed resistance is increased. The rationality of the liquid phase temperature, the difference of the burning loss coefficient and the degree of carbon distribution amount finally determine practical researches such as SiO2/AL2O3 ≧ 4(SiO2 ≧ 12-15%), MnO/FeO ≧ 0.5 times and the like. The sintering process is operated according to the characteristic of low melting point of manganese ore, the ignition process is reasonably controlled, the ignition temperature is generally lower than the sintering temperature of the ore but close to the softening temperature of the ore, generally 950-1100 ℃, and the ignition time is 60 s. Corresponding to 15% of the active area of the sinter machine covered by the igniter. The ignition depth is generally equal to 60% of the thickness of the combustion zone (the thickness of the combustion zone depends on the particle size of fuel, the viscosity and quantity of liquid phase, the negative pressure value and the like, and is usually in the range of 40 mm), and for manganese ore, the reference value of the thickness of the sintering zone is 25-35 mm. The manganese ore powder has small loose density, large burning loss, good material layer air permeability and better material pressing and thickening material layer sintering effects. The cooling time on the manganese ore sintering and extending machine is prolonged or the forced cooling process link is cancelled for natural cooling. The manganese sintering ore is of natural alkalinity, MnO decomposed during the sintering of manganese ore has strong affinity to oxygen, and the MnO and SiO2 can easily form a stable silicate liquid phase. In the sintering process, a liquid phase with low melting point, low viscosity and good fluidity is generated, the burning loss is large, the internal water is high, and a macroporous thin-walled sinter ore structure is easy to form. Therefore, when the liquid phase strength is weaker than that of the iron ore structure during the sintering of the manganese ore, the forced cooling of the sintered ore or the too short cooling time is avoided. The general process requires that the cooling time on the circular cooler or the belt cooler is not less than 10 minutes, and the temperature of entering a cold screen is 250-300 ℃; the temperature of the tail red ore of the cooling machine on the natural cooling process machine is not lower than 500-600 ℃. A pellet shaft furnace production process. Aiming at the characteristics of large granularity, large burning loss, large carbon distribution amount, high porosity of sintered ore and the like, the sintering strength of the manganese ore is finally influenced, and the basic solving process is a shaft furnace physical sintering process. Compared with the common pelletizing process, the wet grinding and manganese ore preheating links are added.
In summary, the following beneficial effects of the invention are:
the method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter can consume a large amount of low-manganese high-iron fine ore and a large amount of fly ash, not only can bring great economic benefit to enterprises, but also has obvious effect of recycling resources, simultaneously reduces the treatment difficulty of the fly ash and reduces the pollution to the environment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1
A method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter comprises the following steps: the method comprises the steps of taking low-manganese high-iron fine ore and dedusting ash as raw materials, blending, then treating, adding the treated raw materials into a manganese-rich slag furnace for smelting manganese-rich slag, sintering by adopting a belt sintering machine, controlling the ignition temperature to be 900-1100 ℃ during sintering, controlling the ignition time to be 60S, controlling the temperature of a high-temperature combustion zone to be 1250 ℃, controlling the sintering time to be 90S, and controlling the effective components in the blending of the raw materials to be as follows: SiO2/AL2O3 ≧ 4(SiO2 ≧ 12-15%), MnO/FeO ≧ 0.5, and the particle size grading requirements of the raw materials and the fuel are: mineral powder of 0-10mm and coke powder of 0-3mm are crushed by a crusher and then enter a hot screen after sintering, small particles below the screen are returned for reprocessing, the part above the screen enters a cooler for cooling, and then is cooled by a cold screen, the particles smaller than 10mm are returned for reprocessing, oversize materials are used for smelting manganese-rich slag, and the material layer thickness and the carbon distribution amount in the belt sintering machine are controlled as follows: 8-10%, wherein the ignition depth in the belt sintering process is 60% of the thickness of the combustion zone, the thickness of the sintering zone is 40mm, the thickness of the sintering zone is 25-35 mm for manganese powder ore, the cooling time is more than 10 minutes, the temperature of the manganese powder ore entering a cold screen is controlled to be 250-300 ℃, and in the natural cooling process, the temperature of the red ore at the tail of the cooling machine is controlled to be: and the dust removal dust is blast furnace gas dust recovered from a manganese-rich slag furnace gas system and mainly comprises mineral powder, coke powder and a small amount of limestone powder, and the carbon-containing furnace dust can be used as a sintering raw material at the temperature of more than 500 ℃ and 600 ℃. In actual use, various raw materials are conveyed to a cylindrical mixer through a feed bin in a proportioning manner by a belt, mixed with hot return ores of a hot sieve and cold return ores of a cold sieve, and then enter a sintering section of a sintering machine for sintering; and (4) unloading ore at the tail after sintering, crushing the ore by a single-roller crusher, feeding the crushed ore into a hot screen, and feeding the sieved small particles into a cylindrical mixer. The part above the sieve enters a belt cooler, after cooling, the part passes through a cold sieve, and the part smaller than 10mm enters a cylindrical mixer. And (5) paving the bottom material with the thickness of 20 mm.
Example 2
A method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter comprises the following steps: the method is characterized in that low-manganese high-iron fine ores and dedusting ash are mixed and then treated, the treated raw materials are added into a manganese-rich slag furnace for smelting manganese-rich slag, the raw material mixing and treating method adopts a shaft furnace process to produce the low-manganese high-iron fine ores and the dedusting ash into manganese oxide ore pellets, and the process comprises the following steps: the method comprises the steps of uniformly mixing and drying raw materials, then carrying out moisture grinding on manganese ore powder to 200 meshes by using a high-efficiency moisture grinding machine, then carrying out pelletizing, then carrying out granulation by using a round roller sieve, feeding 8-16mm of the obtained product into a shaft furnace by using a material distribution trolley for roasting, and after passing through a cooling section in the furnace, feeding the obtained product into a belt cooler for cooling, and then putting the obtained product into a finished product bin for use. In actual use, due to the low melting point and large burning loss of the manganese ore powder, the slag phase is mainly silicate during carbon-blending sintering, the viscosity is small, the liquid phase has good fluidity, the burning loss is large, the internal water is high, a large-hole thin-wall sinter ore structure is easy to form, and the strength is difficult to meet the production requirement of a large-volume manganese-rich slag furnace. The method for producing manganese ore pellets by the shaft furnace uses blast furnace and ore-smelting furnace gas as fuels for roasting, adds mixing, drying and drying, and adopts a high-efficiency wet grinding machine to carry out manganese ore powder particle size wet grinding to about 200 meshes, wherein about 300m3 of mixed gas is required for each ton of manganese ore pellets, and the use pressure is 20-25 KPa. The method comprises the following steps of proportioning various raw materials by an automatic proportioning scale according to a proportion, conveying the raw materials to a mixing chamber through a belt to preheat tail gas, drying and uniformly mixing the raw materials, then feeding the raw materials into a high-efficiency moistening and grinding machine to moisten and grind the raw materials, then feeding the raw materials into a balling disc to pelletize, feeding the raw materials into a shaft furnace (in a form of an air guide wall-drying bed) through a material distribution trolley with the diameter of 8-16mm after the raw materials are granulated by a round roller sieve to roast, feeding the raw materials into a belt cooler after passing through a cooling section in the furnace.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A method for improving the metallurgical performance of manganese-rich slag smelting manganese sinter is characterized by comprising the following steps: the low-manganese high-iron fine ore and the fly ash are mixed and then treated, and the treated raw materials are added into a manganese-rich slag furnace for smelting manganese-rich slag.
2. The method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter according to claim 1, wherein the raw material blending processing method adopts a belt sintering machine to sinter, the ignition temperature is controlled to be 900-1100 ℃, the ignition time is controlled to be 60S, the high-temperature combustion zone temperature is controlled to be 1250 ℃, the sintering time is controlled to be 90S, and the effective components in the raw material blending are controlled as follows: SiO2/AL2O3 ≧ 4(SiO2 ≧ 12-15%), MnO/FeO ≧ 0.5, and the particle size grading requirements of the raw materials and the fuel are: and the mineral powder is 0-10mm and the coke powder is 0-3mm, after sintering is completed, the mineral powder is crushed by a crusher and then enters a hot sieve, small particles below the sieve are returned for retreatment, the part above the sieve enters a cooler for cooling, the part below the sieve is cooled and then enters a cold sieve, the part below the sieve is returned for retreatment, and the material above the sieve is used for smelting the manganese-rich slag.
3. The method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter according to claim 2, wherein the thickness of a material layer and the carbon distribution amount in the belt type sintering machine are controlled as follows: 8 to 10 percent.
4. The method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter as claimed in claim 2, wherein the ignition depth in the belt sintering process is 60% of the thickness of the combustion zone, the thickness of the sintering zone is 40mm, and for manganese powder ore, the thickness of the sintering zone is 25-35 mm.
5. The method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter as claimed in claim 2, wherein the cooling time is more than 10 minutes, the temperature of the cold screen is controlled to be 250 ℃ or 300 ℃, and in the natural cooling process, the temperature of the red ore at the tail of the cooling machine is controlled to be: more than 500-600 ℃.
6. The method for improving the metallurgical property of manganese-rich slag smelted manganese sinter according to claim 1, wherein the raw material blending treatment method adopts a shaft furnace process to produce low-manganese high-iron fine ore and fly ash into manganese oxide ore pellets, and the process comprises the following steps: the method comprises the steps of firstly, uniformly mixing and drying raw materials, then, carrying out moisture grinding on manganese ore powder to 200 meshes by using a high-efficiency moisture grinding machine, then, pelletizing, carrying out particle size finishing by using a round roller sieve, then, conveying 8-16mm of the obtained product into a shaft furnace by using a material distribution trolley for roasting, cooling the obtained product in a belt cooler after passing through a cooling section in the furnace, and then, putting the obtained product into a finished product bin for use.
7. The method for improving the metallurgical property of the manganese-rich slag smelted manganese sinter as claimed in claim 1, wherein the dedusting dust is blast furnace gas dust recovered from a manganese-rich slag furnace gas system, the dedusting dust mainly comprises mineral powder, coke powder and a small amount of limestone powder, and the carbon-containing furnace dust can be used as a sintering raw material.
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| CN113564358A (en) * | 2021-07-27 | 2021-10-29 | 中冶东方工程技术有限公司 | Full manganese powder ore smelting device and method |
| CN113981212A (en) * | 2021-11-16 | 2022-01-28 | 北京科技大学 | Method for preparing sintered ore by batching without flux |
| CN114574695A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering method of ferromanganese ore pellets |
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| CN113981212A (en) * | 2021-11-16 | 2022-01-28 | 北京科技大学 | Method for preparing sintered ore by batching without flux |
| CN114574695A (en) * | 2022-01-19 | 2022-06-03 | 中南大学 | Sintering method of ferromanganese ore pellets |
| CN114574695B (en) * | 2022-01-19 | 2023-08-22 | 中南大学 | Sintering method of iron-manganese ore pellets |
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