CN102534190A - Three-section type heating and roasting method for refining vanadium pentoxide - Google Patents
Three-section type heating and roasting method for refining vanadium pentoxide Download PDFInfo
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- CN102534190A CN102534190A CN2012100181309A CN201210018130A CN102534190A CN 102534190 A CN102534190 A CN 102534190A CN 2012100181309 A CN2012100181309 A CN 2012100181309A CN 201210018130 A CN201210018130 A CN 201210018130A CN 102534190 A CN102534190 A CN 102534190A
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Abstract
The invention discloses a three-section type heating and roasting method for refining vanadium pentoxide, which uses minerals containing vanadium as raw materials. The method includes raw material preparation and raw material heating and roasting. The raw material preparation includes raw material crushing and raw material heating productivity detection. The raw material heating and roasting adopt the following three-section mode: material heating, deep decarburization and preliminary roasting and oxygen-enriched roasting, and the three-section mode can be used independently or in combining mode according to difference of raw material heating productivity. In the deep decarburization and the preliminary roasting and the oxygen-enriched roasting processes, a radiating device and a stirring device are used for controlling material roasting temperature and keeping materials from being coked. Compared with the prior art, the three-section type heating and roasting method for refining the vanadium pentoxide has the advantages of being scientific and reasonable in heating, decarburization and roasting processes of the raw materials, not prone to coke during roasting, small in energy consumption, high in vanadium conversion rate and yield and small in pollution. The roasting temperature is easy to control.
Description
Technical field
The present invention relates to a kind of syllogic heating and roasting method that from contain the vanadium material, refines Vanadium Pentoxide in FLAKES.
Background technology
The heating of bone coal type navajoite and roasting are to refine very important operation in the Vanadium Pentoxide in FLAKES production.Prior art is: raw ore through nature burnt in a heap or with circular fluid bed or with the mixture of cooling back, the decarburization ore deposit after the preliminary decarburization of fluidizing furnace and raw ore or raw ore, or according to circumstances in raw material, participate in a considerable amount of carbon again other contain the insufficient vanadium material that contains of combustiblecomponents; Adopt normal temperature to get in flat kiln, shaft furnace or the rotary kiln and carry out roasting, the carbon burning contained in the main dependence material of keeping of the intensification of material and maturing temperature is generated heat.Its weak point: maturing temperature is wayward, and easy coking influences production efficiency during roasting, and energy consumption is big, and the turnover ratio of vanadium is low.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide a kind of maturing temperature easily control, that be difficult for the refinement Vanadium Pentoxide in FLAKES of turnover ratio coking, that can improve vanadium during roasting syllogic heating and roasting method.
The object of the invention is achieved through following technical proposals: said method is to be raw material to contain vanadium minerals; The step of said method comprises that raw material is prepared and raw material heating and roasting: said raw material prepares to comprise that raw material crushing and raw material thermal value detect; Three segmented modes below said heating and roasting are adopted:
(1), first section raw material heating: adopt heating commonly used and decarbonization device or heating unit raw material to be heated and preliminary decarburization or heating in this stage; Its carbon rejection process is a combustion processes; The heat of its generation is used for generating or other purposes, and drop temperature is not less than 730 degree Celsius;
(2), second section depth decarburization and first one-step baking: the roasting chamber of this section is first step roasting chamber, only feeds pressure air in the first step roasting chamber, and the carbon residue in the material is fully burnt; Feeding temperature is not less than 730 degree Celsius, and depth decarburization and preliminary roasting time are 30-120 minute, and drop temperature is controlled at 800-950 degree Celsius;
(3), the 3rd section oxygen-enriched air roasting: the roasting chamber of this section is roasting chamber, the second stage, feeds oxygen rich gas in the roasting chamber, the second stage; Roasting time is 60-360 minute; Feeding temperature is a 800-950 degree Celsius, and maturing temperature is a 800-900 degree Celsius; The high-temperature material of roasting after discharging cooling, the subsequent handling of refining Vanadium Pentoxide in FLAKES;
Above syllogic heating and roasting mode, according to the difference of raw material thermal value, perhaps combination is used separately;
(1), thermal value is greater than the raw material of per kilogram 750 kilocalories, carries out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(2), in the raw material of thermal value, participate in super sea coal and mix less than per kilogram 750 kilocalories, its thermal value is reached more than per kilogram 750 kilocalories, carry out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(3), for the raw material of thermal value less than per kilogram 750 kilocalories, adopt shaft furnace directly material to be heated and second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again, the temperature of charge that gets into the 3rd section oxygen-enriched air roasting chamber is a 800-950 degree Celsius;
(4) for the raw material of thermal value less than per kilogram 50 kilocalories, adopt fuel oil or combustion gas or electrically heated or high-temperature flue gas type of heating directly material to be heated, make material temperature reach 800-950 degree Celsius after, high-temperature material directly gets into the 3rd section oxygen-enriched air roasting.
Said second section depth decarburization regulated and control with the drop temperature of first one-step baking in the following manner:
(1), regulates the air input of different positions in the first step roasting chamber;
(2), start or stop the heat abstractor of setting in the first step roasting chamber;
(3), start or stop the mechanical or jet-propelled whipping appts of setting in the first step roasting chamber;
Above temperature adjusting mode can be used separately, also can make up use.
Said the 3rd section oxygen-enriched air roasting is that oxygen enrichment has the pressure roasting, adopts intermittently or the oxygen supply of successive mode; Keeping of its maturing temperature mainly relies on the acting in conjunction of the high temperature and the oxygen-containing gas of material self, also utilizes the heat insulation effect of roasting chamber, the second stage simultaneously.
Heating commonly used and decarbonization device that said first section raw material heating zone adopts are circular fluid bed or fluidizing furnace or shaft furnace or coal-powder boiler.
In the process of said the 3rd section oxygen-enriched air roasting, adopt machinery or air operated mode to stir material.
Compared with prior art, the present invention has the following advantages: the heating of raw material, decarburization and sinter process combination are scientific and reasonable, and maturing temperature is controlled easily, is difficult for coking during roasting, and energy consumption is little, the vanadium turnover ratio high, and output is high, pollutes little.
Embodiment
Below in conjunction with embodiment the present invention is described further:
Said method is to be raw material to contain vanadium minerals; The step of said method comprises that raw material is prepared and raw material heating and roasting: said raw material prepares to comprise that raw material crushing and raw material thermal value detect; Three segmented modes below said heating and roasting are adopted:
(1), first section raw material heating: adopt heating commonly used and decarbonization device or heating unit raw material to be heated and preliminary decarburization or heating in this stage; Its carbon rejection process is a combustion processes; The heat of its generation is used for generating or other purposes, and drop temperature is not less than 730 degree Celsius;
(2), second section depth decarburization and first one-step baking: the roasting chamber of this section is first step roasting chamber, only feeds pressure air in the first step roasting chamber, and the carbon residue in the material is fully burnt; Feeding temperature is not less than 730 degree Celsius, and depth decarburization and preliminary roasting time are 30-120 minute, and drop temperature is controlled at 800-950 degree Celsius;
(3), the 3rd section oxygen-enriched air roasting: the roasting chamber of this section is roasting chamber, the second stage, feeds oxygen rich gas in the roasting chamber, the second stage; Roasting time is 60-360 minute; Feeding temperature is a 800-950 degree Celsius, and maturing temperature is a 800-900 degree Celsius; The high-temperature material of roasting after discharging cooling, the subsequent handling of refining Vanadium Pentoxide in FLAKES;
Above syllogic heating and roasting mode, according to the difference of raw material thermal value, perhaps combination is used separately;
(1), thermal value is greater than the raw material of per kilogram 750 kilocalories, carries out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(2), in the raw material of thermal value, participate in super sea coal and mix less than per kilogram 750 kilocalories, its thermal value is reached more than per kilogram 750 kilocalories, carry out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(3), for the raw material of thermal value less than per kilogram 750 kilocalories, adopt shaft furnace directly material to be heated and second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again, the temperature of charge that gets into the 3rd section oxygen-enriched air roasting chamber is a 800-950 degree Celsius;
(4) for the raw material of thermal value less than per kilogram 50 kilocalories, adopt fuel oil or combustion gas or electrically heated or high-temperature flue gas type of heating directly material to be heated, make material temperature reach 800-950 degree Celsius after, high-temperature material directly gets into the 3rd section oxygen-enriched air roasting.
Said second section depth decarburization regulated and control with the drop temperature of first one-step baking in the following manner:
(1), regulates the air input of different positions in the first step roasting chamber;
(2), start or stop the heat abstractor of setting in the first step roasting chamber;
(3), start or stop the mechanical or jet-propelled whipping appts of setting in the first step roasting chamber;
Above temperature adjusting mode can be used separately, also can make up use.
Said the 3rd section oxygen-enriched air roasting is that oxygen enrichment has the pressure roasting, adopts intermittently or the oxygen supply of successive mode; Keeping of its maturing temperature mainly relies on the acting in conjunction of the high temperature and the oxygen-containing gas of material self, also utilizes the heat insulation effect of roasting chamber, the second stage simultaneously.In other words, also made full use of the characteristic of the thermal insulation layer of roasting chamber, the second stage.
Heating commonly used and decarbonization device that said first section raw material heating zone adopts are circular fluid bed or fluidizing furnace or shaft furnace or coal-powder boiler.
In the process of said the 3rd section oxygen-enriched air roasting, adopt machinery or air operated mode to stir material.
The mode of production of the present invention adopts continous way input and output material or the discharging of continous way charging intermittent type.
The discharging of continous way charging intermittent type: charging is carried out continuously, and discharging at set intervals once.
Continous way input and output material: after roasting for some time is wanted in first charging, after 5 hours, just get into continuous feeding and discharging.
Embodiment 1:
The raw ore thermal value is per kilogram 850 kilocalories, prepares granularity after the fragmentation less than 10 millimeters raw material.Raw material is introduced into circular fluid bed heating and preliminary decarburization; Its high temperature decarburization slag gets into first step roasting chamber with the temperature that is higher than 740 degree Celsius; First step roasting chamber can be filled into 90% volume, and injection pressure air in the raw material in first step roasting chamber makes the carbon residue in the material continue fully burning; Through the air capacity of control injection different sites material, the control drop temperature is at 800-950 degree Celsius; Material is through behind about about 2 hours depth decarburizations and the first one-step baking in the first step roasting chamber; Its material gets into roasting chamber, the second stage with the temperature of 800-950 degree Celsius; Roasting chamber, the second stage can be filled into 90% volume; Inject oxygen enrichment in the material in roasting chamber, the second stage, material is carried out oxygen enrichment has the pressure roasting, and roasting time is 1-6 hours.
Embodiment 2:
On the basis of embodiment 1, heat abstractor is set in first step roasting chamber and stirs companion's device, the heat abstractor in the control first step roasting chamber with stir companion's device and control maturing temperature and do not allow the material coking.
Embodiment 3:
On the basis of embodiment 1, in roasting chamber, the second stage, be provided with and stir companion's device, stirring in the control roasting chamber, the second stage accompanies device to control oxygen enrichment to be had the temperature of pressing roasting and not to allow the material coking.
Embodiment 4:
On the basis of embodiment 2, in roasting chamber, the second stage, be provided with and stir companion's device, stirring in the control roasting chamber, the second stage accompanies device to control oxygen enrichment to be had the temperature of pressing roasting and not to allow the material coking.
Embodiment 5:
The raw ore thermal value is about per kilogram 400 kilocalories, is broken into granularity less than 10 millimeters, and evenly ginseng is mixed super sea coal, prepares thermal value and reaches the above raw material of per kilogram 800 kilocalories.Raw material is introduced into circular fluid bed heating and preliminary decarburization; Its high temperature decarburization slag gets into first step roasting chamber with the temperature that is higher than 740 degree Celsius, and the roasting chamber can be filled into 90%, injects air in the raw material in first step roasting chamber; Make the carbon residue in the material continue fully burning; Inject air capacity, the control heat abstractor of different sites material and the working condition of stirring companion's device through control, the control drop temperature is at 800-950 degree Celsius, and roasting time is about 2 hours; Material temperature with 800-950 degree Celsius behind depth decarburization about 2 hours and first one-step baking gets into roasting chamber, the second stage in the first step roasting chamber; Roasting chamber, the second stage can be filled into 90%; Inject oxygen enrichment in the material in roasting chamber, the second stage; Material is carried out oxygen-enriched air roasting, and roasting time is 1-6 hours, moves simultaneously to stir companion's device in the roasting chamber, the second stage and control oxygen enrichment and the temperature of pressing roasting is arranged and do not allow the material coking.
Embodiment 6:
The raw ore thermal value is about per kilogram 400 kilocalories; Prepare granularity after the pulverizing less than 80 purpose raw materials, adopt shaft furnace directly raw material to be heated and depth decarburization, raw material directly gets into roasting chamber, the second stage with the temperature of 800-950 degree; Carry out the 3rd section oxygen-enriched air roasting; Roasting chamber, the second stage can be filled into 90% volume, and the injection oxygen enrichment carries out oxygen enrichment in the material in roasting chamber, the second stage has the pressure roasting, and roasting time is 1-6 hours.
Embodiment 7:
On the basis of embodiment 6, be provided with in the roasting chamber, the second stage and stir companion's device, move simultaneously and stir companion's device in the roasting chamber, the second stage and control oxygen enrichment and the temperature of pressing roasting is arranged and do not allow the material coking.
Embodiment 8:
The raw ore thermal value is about per kilogram 40 kilocalories; Prepare granularity after the pulverizing less than 80 purpose raw materials, adopt the heating of fuel oil or combustion gas or electrically heated or high-temperature flue gas type of heating, make temperature of charge reach 800-950 degree Celsius after; High-temperature material directly gets into roasting chamber, the second stage; The roasting chamber can be filled into 90%, injects oxygen enrichment in the material in the roasting chamber, and material is carried out oxygen-enriched air roasting; Roasting time is 1-6 hours, moves simultaneously to stir companion's device in the roasting chamber, the second stage and control oxygen enrichment and the temperature of pressing roasting is arranged and do not allow the material coking.
Claims (7)
1. a syllogic heating and roasting method that refines Vanadium Pentoxide in FLAKES, said method are to be raw material to contain vanadium minerals; The step of said method comprises that raw material is prepared and raw material heating and roasting: it is characterized in that: said raw material prepares to comprise that raw material crushing and raw material thermal value detect; Three segmented modes below said heating and roasting are adopted:
(1), first section raw material heating: adopt heating commonly used and decarbonization device or heating unit raw material to be heated and preliminary decarburization or heating in this stage; Its carbon rejection process is a combustion processes; The heat of its generation is used for generating or other purposes, and drop temperature is not less than 730 degree Celsius;
(2), second section depth decarburization and first one-step baking: the roasting chamber of this section is first step roasting chamber, only feeds pressure air in the first step roasting chamber, and the carbon residue in the material is fully burnt; Feeding temperature is not less than 730 degree Celsius, and depth decarburization and preliminary roasting time are 30-120 minute, and drop temperature is controlled at 800-950 degree Celsius;
(3), the 3rd section oxygen-enriched air roasting: the roasting chamber of this section is roasting chamber, the second stage, feeds oxygen rich gas in the roasting chamber, the second stage; Roasting time is 60-360 minute; Feeding temperature is a 800-950 degree Celsius, and maturing temperature is a 800-900 degree Celsius; The high-temperature material of roasting after discharging cooling, the subsequent handling of refining Vanadium Pentoxide in FLAKES;
Above syllogic heating and roasting mode, according to the difference of raw material thermal value, perhaps combination is used separately;
(1), thermal value is greater than the raw material of per kilogram 750 kilocalories, carries out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(2), in the raw material of thermal value, participate in super sea coal and mix less than per kilogram 750 kilocalories, its thermal value is reached more than per kilogram 750 kilocalories, carry out first section heating and preliminary decarburization earlier; After carry out second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again;
(3), for the raw material of thermal value less than per kilogram 750 kilocalories, adopt shaft furnace directly material to be heated and second section depth decarburization and first one-step baking; Carry out the 3rd section oxygen-enriched air roasting again, the temperature of charge that gets into the 3rd section oxygen-enriched air roasting chamber is a 800-950 degree Celsius;
(4) for the raw material of thermal value less than per kilogram 50 kilocalories, adopt fuel oil or combustion gas or electrically heated or high-temperature flue gas type of heating directly material to be heated, make material temperature reach 800-950 degree Celsius after, high-temperature material directly gets into the 3rd section oxygen-enriched air roasting.
2. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 1 is characterized in that: said second section depth decarburization regulated and control with the drop temperature of first one-step baking in the following manner:
(1), regulates the air input of different positions in the first step roasting chamber;
(2), start or stop the heat abstractor of setting in the first step roasting chamber;
(3), start or stop the mechanical or jet-propelled whipping appts of setting in the first step roasting chamber;
Above temperature adjusting mode can be used separately, also can make up use.
3. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 1 and 2, it is characterized in that: said the 3rd section oxygen-enriched air roasting is that oxygen enrichment has the pressure roasting, adopts intermittently or the oxygen supply of successive mode; Keeping of its maturing temperature mainly relies on the acting in conjunction of the high temperature and the oxygen-containing gas of material self, also utilizes the heat insulation effect of roasting chamber, the second stage simultaneously.
4. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 1 and 2 is characterized in that: heating commonly used and decarbonization device that said first section raw material heating zone adopts are circular fluid bed or fluidizing furnace or shaft furnace or coal-powder boiler.
5. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 1 and 2 is characterized in that: in the process of said the 3rd section oxygen-enriched air roasting, adopt machinery or air operated mode to stir material.
6. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 3 is characterized in that: in the process of said the 3rd section oxygen-enriched air roasting, adopt machinery or air operated mode to stir material.
7. the syllogic heating and the roasting method of refinement Vanadium Pentoxide in FLAKES according to claim 4 is characterized in that: in the process of said the 3rd section oxygen-enriched air roasting, adopt machinery or air operated mode to stir material.
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Cited By (7)
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| CN103266221A (en) * | 2013-06-04 | 2013-08-28 | 彭武星 | Method for roasting ores or slag |
| CN105936508A (en) * | 2016-06-01 | 2016-09-14 | 望江县金峰矿产品科技有限公司 | Method for extracting silica from ore slag |
| CN111304464A (en) * | 2020-02-28 | 2020-06-19 | 东北大学 | Method for extracting vanadium by multistage roasting, acid mixing and curing of stone coal vanadium ore |
| CN111304465A (en) * | 2020-02-28 | 2020-06-19 | 东北大学 | Method for extracting vanadium by decarburization-crystal breaking roasting enhanced acid leaching of vanadium-containing stone coal |
| CN111719054A (en) * | 2020-07-27 | 2020-09-29 | 东北大学 | Oxidation, crystal breaking and roasting comprehensive utilization method of stone coal vanadium ore |
| CN111876616A (en) * | 2020-07-27 | 2020-11-03 | 东北大学 | Stone coal navajoite oxidation, crystal breaking, roasting and vanadium extraction comprehensive utilization system |
| CN114560641A (en) * | 2022-02-16 | 2022-05-31 | 北京蚯蚓科技有限公司 | Method for preparing gravel |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266221A (en) * | 2013-06-04 | 2013-08-28 | 彭武星 | Method for roasting ores or slag |
| CN103266221B (en) * | 2013-06-04 | 2014-09-17 | 彭武星 | Method for roasting ores or slag |
| CN105936508A (en) * | 2016-06-01 | 2016-09-14 | 望江县金峰矿产品科技有限公司 | Method for extracting silica from ore slag |
| CN111304464A (en) * | 2020-02-28 | 2020-06-19 | 东北大学 | Method for extracting vanadium by multistage roasting, acid mixing and curing of stone coal vanadium ore |
| CN111304465A (en) * | 2020-02-28 | 2020-06-19 | 东北大学 | Method for extracting vanadium by decarburization-crystal breaking roasting enhanced acid leaching of vanadium-containing stone coal |
| CN111719054A (en) * | 2020-07-27 | 2020-09-29 | 东北大学 | Oxidation, crystal breaking and roasting comprehensive utilization method of stone coal vanadium ore |
| CN111876616A (en) * | 2020-07-27 | 2020-11-03 | 东北大学 | Stone coal navajoite oxidation, crystal breaking, roasting and vanadium extraction comprehensive utilization system |
| CN111719054B (en) * | 2020-07-27 | 2021-08-31 | 东北大学 | Oxidation, crystal breaking and roasting comprehensive utilization method of stone coal vanadium ore |
| CN114560641A (en) * | 2022-02-16 | 2022-05-31 | 北京蚯蚓科技有限公司 | Method for preparing gravel |
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Application publication date: 20120704 |