CN103215440B - Desulfuration roasting method of vanadium-extraction stone coal - Google Patents
Desulfuration roasting method of vanadium-extraction stone coal Download PDFInfo
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Abstract
The invention discloses a desulfuration roasting method of vanadium-extraction stone coal. The desulfuration roasting method comprises the following steps of: (1), pre-treating materials, namely, adding a coal catalyst to a stone coal material to prepare stone coal granules containing the coal catalyst, wherein the dimension of the stone coal granules is controlled to be not more than 25mm; crushing a sulfur-fixation temperature control agent until the granularity is less than 15mm; preparing a desulfurizing agent into powder with 80-micron screen residues of not being more than 30% or slurry with moisture content of not being less than 50% or a solution with mass concentration of not being less than 50%; (2), desulfuration-roasting, namely, feeding the stone coal granules containing the coal catalyst obtained in the step (1) to a roasting furnace for roasting at 700 DEG C to 1050 DEG C under a non-reducing atmosphere, and feeding the sulfur-fixation temperature control agent to the roasting furnace; and spraying the desulfurizing agent from the upper space in the roasting furnace to the space area of a smoke gas settling chamber, or spraying the desulfurizing agent from the upper space in the roasting furnace to the space area of a cyclone dust collector.
Description
Technical field
The present invention relates to a kind of roasting method of Rock coal containing alum, especially relate to a kind of roasting method that Rock coal containing alum is carried out to furnace system synchronized desulfuring.
Background technology
China is containing carbon shale (being commonly called as bone coal) aboundresources, but the contained gangue of different zones bone coal and mineral composition differ greatly, bone coal thermal value generally in 450 × 4.18KJ/kg ~ 1600 × 4.18KJ/kg fluctuation, bone coal sulfur-bearing is generally in 0.8 ~ 4.5% fluctuation, as V in bone coal
2o
5content>=0.7% time, generally as navajoite, exploit.
The roasting of vanadium extraction bone coal is the critical process of extracting vanadium from stone coal, very big to vanadium transformation efficiency and vanadium extraction effectiveness affects, and the roasting method of current ripe application has two kinds of stone coal sodium roasting and bone coal oxidizing roastings.
Stone coal sodium roasting method is bone coal to be added to fat coal and add more than 1% Industrial Salt, through broken, grinding, makes pellet, then carries out the method for roasting.Due to the sulphur chlorine dual function of stone sulfur content in coal and added Industrial Salt, environmental protection treatment is difficulty very, causes near stoving oven the trees in several kilometers and crops large stretch of withered.
Bone coal oxidizing roasting method, is generally that first fragmentation adds fat coal roasting decarburization, and then the oxidizing roasting that burns gas, to improve the transformation efficiency of vanadium, and its flue gas SO
2quantity discharged is large, processes more difficultly, and medium and small sized enterprises are nearly all reluctant to invest tens million of units and build flue gas desulphurization system, cause actual SO
2a large amount of directly discharges, same serious environment pollution.
CN101776391A discloses a kind of fluidizing furnace for vanadium extraction and decarbonization of stone coal, to be difficult to for existing fluidizing furnace the situation that calcination process calorific value is less than the Rock coal containing alum of 1000 × 4.18KJ/kg, the method providing be " on the main bed of fluidizing furnace and secondary bed; increase coal gas combustion-supporting mode; utilize gas-fired that heat is provided; to realize the boiling furnace combustion of low heat value Rock coal containing alum; ... " low heat value bone coal described in it is the Rock coal containing alum that calorific value is less than 1000 × 4.18KJ/kg, and objectively most bone coal calorific value in 600 ~ 1000Kcal/kg scope.
CN202792967U discloses a kind of stone coal vanadium-extracting roasting equipment, " comprising: the second stoving oven transforming for the first stoving oven of stone coal decarbonization with for vanadium; described the first stoving oven and the second stoving oven are Fludized boiling stove; ... ", described in it " novel Fludized boiling stove; by burner SA supplementing energy is conducive to control the condition that decarburization or vanadium transform." " ... burner SA, for spray heavy oil in furnace chamber, the fuel such as Sweet natural gas or diesel oil, to provide the institute of roasting in furnace chamber heat requirement.”
Chinese patent CN102534193A discloses a kind of method of Rock coal containing alum being carried out to decarburization and roasting, its equipment adopting is circular fluid bed or fluidizing furnace, step comprises: according to the difference of raw material thermal value and characteristic, raw material is handled as follows: add super sea coal and mix, make its thermal value higher than 750Kcal/kg, adding 0 ~ 20% additive mixes again, then through fragmentation again abrasive dust make 80 ~ 200 object powders, again powder is made to the spherical material of 1 ~ 20 millimeter, afterwards, by spherical material decarburization roasting, slag after spherical material roasting carries out bakes to burn the article again.
Through retrieving domestic and international vanadium extraction bone coal roasting method data, and take a broad survey domestic bone coal calciner and roasting method in full flourish, the problem of existence is:
1, lack a kind of method that can give full play to simply the calorific value of bone coal material grain own, especially lack and a kind ofly give full play to the most large 600 × 4.18KJ/kg ~ 1000 × 4.18KJ/kg compared with method (theory and the evidence of the calorific value of low heat value bone coal material grain own, give full play to the calorific value of 600Kcal/kg bone coal, in stove, temperature can reach more than 900 ℃), and the current technical measures of taking are mostly by adding fat coal or next combustion-supporting with oil gas heat supply, cause carbon oxidizing fire generation in time reduction (the bone coal material intragranular portion carbon reduced iron of bone coal granule interior, vanadium, sulphur etc.), cause incomplete decarburization (the inner carbon reduced iron of bone coal, vanadium, sulphur etc.) and the oxidation conversion obstacle of vanadium,
2, lack a kind of measure that can adjust in time temperature of charge in stoving oven, the temperature regulating and controlling when Lu Nei temperature localized hyperthermia and material itself is unreachable causes vanadium solid solution in aluminosilicate mineral lattice or is difficult to oxidizedly, has also directly affected the transformation efficiency of vanadium;
3, lack a kind of applicable, easy, solid sulphur method of desulfurization cheaply, and expensive flue gas desulfurization (FGD) unit investment requirement causes the general serious environmental pollution disaster in vanadium extraction bone coal roasting various places.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiencies in the prior art, provides a kind of easy and simple to handle, can make full use of performance bone coal calorific value, improves vanadium transformation efficiency and vanadium extraction bone coal desulphurizing roasting method that can synchronized desulfuring.
The technical solution adopted for the present invention to solve the technical problems is that a kind of vanadium extraction bone coal desulphurizing roasting method, comprises the following steps:
(1) raw materials pretreatment: coal is added in bone coal material with atomization dispersing mode before bone coal fragmentation or in fragmentation or after fragmentation with liquid form with catalyzer, or enter before stove roasting on drawing-in device or metering feed device or feed opening adds in bone coal material with atomization dispersing mode, described coal is the 0.01 ~ 1.0%(preferably 0.1～0.8% of bone coal quality with catalyst levels), make the bone coal material grain containing coal catalyzer, bone coal material particle size control≤25mm;
To consolidate the agent of sulphur temperature control and be crushed to granularity <15mm;
Sweetening agent is made to 80 μ m tail over≤30% powder, or the slip of water ratio >=50%, or the solution of mass concentration >=50%;
(2) desulphurizing roasting: step (1) gained is sent into roasting under 700 ~ 1050 ℃ of stoving oven inherences, non-reduced atmosphere containing coal with the bone coal material grain of catalyzer, described solid sulphur temperature control agent is sent in stoving oven, and described solid sulphur temperature control agent consumption is 0.5 ~ 10% of bone coal quality; Upper space by described sweetening agent in stoving oven to the area of space of fume sedimentation chamber sprays into, or the upper space in stoving oven sprays into cyclone area of space, and doctor solution consumption detects SO online according to waste gas
2value is adjusted straying quatity, with SO in waste gas
2content reaches emission standard value and is as the criterion.
Described coal catalyzer can promote bone coal oxidizing fire for containing, improves vanadium transformation efficiency, promote calcareous absorption SO
2generate CaSO
3,
And directional catalyzing CaSO
3rapid conversion is CaSO
4the material of effect, as commercially available ZC-5 catalyzer, ZC-6 catalyzer, bone coal or coal combustion promotor etc. for moulded coal for moulded coal.
Described solid sulphur temperature control agent can be selected Wingdale or rhombspar, utilizes Wingdale or the rhombspar point heat of desorption in material in stoving oven,
To adjust, control temperature of charge in stoving oven, and utilize the functional element of coal in catalyzer to promote calcium absorption SO
2, the labile calcium sulfite rapid conversion of directional catalyzing is the characteristic of stable calcium sulfate, completes the effectively thick sweetening process of bone coal roasting.
Described sweetening agent can be a kind of in Wingdale or lime or soda ash or soda or two kinds, can powder or slurry or liquid form spray into upper space in stoving oven to settling pocket area of space, or spray into upper space in stoving oven to cyclone area of space, implement meticulous desulfurization.
Described stoving oven can be general or improved fluidizing furnace or circular fluid bed, and stoving oven waste-gas heat can be used for heat supply, oven dry or generating.
Beneficial effect of the present invention: (1) employing contains can promote bone coal oxidizing fire, improve vanadium transformation efficiency, promote calcareous absorption SO
2generate CaSO
3, and directional catalyzing CaSO
3rapid conversion is CaSO
4the multifunctional coal of effect mixes in bone coal with catalyzer, controlling in stove is non-reduced atmosphere, with chemical catalytic oxidation method, accelerate the oxidizing fire of carbonaceous in bone coal, eliminate to greatest extent bone coal granule interior carbon to reductive actions such as iron, vanadium, sulphur, significantly improve the burn-off rate of carbon, reach abundant decarburization and make full use of the object of bone coal calorific value, and improve by this slag particle porosity, be convenient to oxygen and enter material intragranular portion, and vanadium is implemented to catalyzed oxidation conversion; (2) with temperature of charge in point heat of desorption adjustment control stove of Wingdale cheap and easy to get, rhombspar, prevent from the one hand causing vanadium solid solution to enter aluminosilicate mineral lattice because of localized hyperthermia or uncontrollable temperature of charge the quick absorbing and removing SO of calcium oxide under the directional catalyzing effect of catalyst function element on the other hand
2for CaSO
3, and directional catalyzing is converted into CaSO
4, reach the solid sulphur object of effective desulfurization; (3) directly at stoving oven upper space to settling pocket area of space or stove internal upper part space to cyclone area of space, spray into polymolecularity sweetening agent, the catalytic elements effect of carrying secretly in area of space air-flow whereby assists to implement the solid sulphur of meticulous desulfurization; (4) method is simple, and convenient operation removes to do the desulfurizer of high running cost without great amount of investment, and good economy performance, is expected thoroughly to solve the environmental pollution disaster of roasting bone coal.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
Vanadium extraction bone coal raw ore V
2o
5content is average 0.87%, the average 735 × 4.18KJ/kg of calorific value, sulphur content average 1.7%; Stoving oven adopts the fluidizing furnace with settling pocket, and stove inner bottom part air distribution plate is to the about 9m of headspace height.Processing method originally adopts intermittence to add calorific value 5500Kcal/kg left and right bituminous coal when roasting bone coal, on average add bituminous coal amount and be about 5% of bone coal, after roasting, slag inside is black or brown, chemical analysis vanadium transformation efficiency fluctuates 38 ~ 54%, furnace roof is flooded with strong and stimulating stink, environmental protection tests waste gas SO
2up to 2000mg/Nm
3above.
The coal of the present embodiment is selected commercially available ZC-5 catalyzer (Changsha Zi Chen Science and Technology Development Co., Ltd. production for moulded coal with catalyzer; Lower with), Gu CaO content is selected in the agent of sulphur temperature control, be 96.4% Wingdale, sweetening agent is selected dry hydrate, comprises the following steps:
(1) raw materials pretreatment: bone coal is first crushed to≤10mm material grain enters feed bin, ZC-5 moulded coal with catalyzer on the belt weigher drawing-in device under feed bin continuous uniform atomization be added on bone coal material grain, ZC-5 moulded coal is bone coal with catalyst levels 0.3%, entering to make the bone coal material grain containing ZC-5 moulded coal catalyzer in stove before roasting;
Gu sulphur temperature control agent limestone crushing to≤8mm particle enters granular Wingdale steel silo, Wingdale claims metering feeding with belt under storehouse, can directly deliver to bone coal material grain spout send in stoving oven by elephant trunk;
Sweetening agent white lime is dry powder, sends into lime steel silo after sieving, and under storehouse, with rigid impeller feeding machine and screw feeder interlocked control flow, the compressed-air actuated transport pipe of screw feeder outlet access is connected to fluidizing furnace top, and point four arms are communicated with in stove;
(2) desulphurizing roasting: will send in fluidizing furnace by normal feeding manner with the bone coal material grain of catalyzer containing ZC-5 moulded coal, adjust fluidizing furnace gas blower and be oxidizing fire atmosphere (non-reduced atmosphere) with air quantity to stove; Gu sulphur temperature control agent Wingdale is sent in fluidizing furnace with bone coal material grain from bone coal material grain spout through elephant trunk, amount of lime is 3% of bone coal weight, in stove, the control of roasting temperature of charge is 830 ~ 890 ℃, and logical pressurized air sprays into sweetening agent dry hydrate from furnace chamber top, according to waste gas SO
2detected value is adjusted dry hydrate straying quatity, as SO in waste gas
2reach≤200mg/Nm of content
3emission standard time, the straying quatity of sweetening agent lime powder is about 1.03% of bone coal amount.
The present embodiment vanadium transformation efficiency reaches 69 ~ 76%, and roasting method more originally has on average improved 28.1 percentage points, saves the combustion-supporting high-quality bituminous coal that is equivalent to bone coal weight 5%, exhaust gas emission SO
2up to standard, on furnace roof without any irritating smell.
Case study on implementation 2
Embodiment 2 and embodiment 1 select same fluidizing furnace, bone coal ature of coal is identical with embodiment 1 bone coal ature of coal used, sulphur-fixing agent is also identical with embodiment 1, and different is that coal catalyzer is selected commercially available ZC-6 catalyzer (Changsha Zi Chen Science and Technology Development Co., Ltd. production for moulded coal; Lower same), sweetening agent is selected soda ash, comprises the following steps:
(1) raw materials pretreatment: bone coal is first crushed to≤10mm material grain enters feed bin, coal with catalyzer on the belt weigher drawing-in device under feed bin continuous uniform atomization be added on bone coal material grain, ZC-6 moulded coal is bone coal with catalyst levels 0.7%, entering to make the bone coal material grain containing ZC-6 moulded coal catalyzer in stove before roasting;
To consolidate sulphur temperature control agent limestone crushing to≤8mm particle and enter granular Wingdale steel silo, Wingdale claims metering feeding with belt under storehouse, can directly deliver to bone coal material grain spout send in stoving oven by elephant trunk;
Sweetening agent soda ash is under agitation soluble in water, the soda ash aqueous solution of making mass percentage concentration 30% is loaded in bucket, with pump duct coupling, to the settling pocket top being connected with furnace chamber top, pipeline access pressurized air connects 12 atomizers to the settling pocket upper space being connected with furnace chamber with 12 hole pipes;
(2) desulphurizing roasting: the sending in fluidizing furnace by normal feeding manner with the bone coal material grain of catalyzer containing coal of preparation, add bituminous coal in stopping from fire door to stove combustion-supporting, adjustment fluidizing furnace gas blower is oxidizing atmosphere (non-reduced atmosphere) with air quantity to stove; Gu sulphur control agent Wingdale is delivered to bone coal material grain spout through elephant trunk and is sent in fluidizing furnace with bone coal material grain, through test, adjust selected:, Gu sulphur temperature control agent amount of lime is about 4.0% of bone coal, 850 ~ 900 ℃ of roasting temperature of charge controls in stove, logical pressurized air sprays into soda ash solution from the top of settling chamber atomization being connected with furnace chamber top, according to waste gas SO
2detected value is adjusted soda ash solution straying quatity, as SO in waste gas
2reach≤200mg/Nm of content
3emission standard time, the straying quatity conversion of sweetening agent soda ash is about 0.2% of bone coal amount.
The present embodiment vanadium transformation efficiency reaches 74 ~ 82%, and roasting method more originally on average improves 33.1 percentage points, saves the combustion-supporting high-quality bituminous coal that is equivalent to bone coal weight 5%, exhaust gas emission SO
2up to standard, on furnace roof without any irritating smell.
Case study on implementation 3:
Vanadium extraction bone coal raw ore V
2o
5content is average 0.91%, the average 796 × 4.18KJ/kg of calorific value, sulphur content average 1.9%; Stoving oven adopts the fluidizing furnace with cyclone, and stove inner bottom part air distribution plate is to the about 8m of headspace height.Processing method originally adopts intermittence to add calorific value 5500Kcal/kg left and right bituminous coal when roasting bone coal, on average add bituminous coal amount and be about 3% of bone coal, after roasting, slag inner section is brown mostly, chemical analysis vanadium transformation efficiency fluctuates 43 ~ 52%, furnace roof is flooded with strong and stimulating stink, environmental protection tests waste gas SO
2up to 2000mg/Nm
3above.
The coal of the present embodiment is selected commercially available ZC-5 moulded coal catalyzer with catalyzer, Gu the Wingdale of CaO content 98.1% is selected in the agent of sulphur temperature control, sweetening agent is selected roasting Wingdale, comprises the following steps:
(1) raw materials pretreatment: bone coal is first crushed to≤12mm material grain enters feed bin, ZC-5 moulded coal with catalyzer on the belt weighing balance drawing-in device under feed bin continuous uniform atomization be added on bone coal material grain, ZC-5 moulded coal is about 0.5% of bone coal with catalyst levels, entering the bone coal material grain of making before roasting in stove containing ZC-5 moulded coal catalyzer;
To consolidate sulphur temperature control agent limestone crushing to≤8mm particle and enter granular Wingdale steel silo, Wingdale claims metering feeding with belt under storehouse, can directly deliver to bone coal material grain spout send in stoving oven by elephant trunk;
Sweetening agent roasting Wingdale is piece material, contain insufficiently burnt calcium carbonate and calcium oxide, undecomposed Wingdale accounts for 32%, through broken, abrasive dust to 180 mesh screen residue <8%, lime powder steel silo is sent in pulverizing, under storehouse, with rigid impeller feeding machine and screw feeder interlocked control flow, the compressed-air actuated transport pipe of screw feeder outlet access is connected to fluidizing furnace top, and point four arms are communicated with in stove;
(2) desulphurizing roasting: by sending in fluidizing furnace by normal feeding manner with the bone coal material grain of catalyzer containing coal, stop adding bituminous coal in stove combustion-supporting, adjust fluidizing furnace gas blower and be oxidizing fire atmosphere (non-reduced atmosphere) with air quantity to stove; Gu sulphur temperature control agent Wingdale is sent in fluidizing furnace with bone coal material grain from bone coal material grain spout through elephant trunk; Amount of lime is 5% of bone coal, 830 ~ 890 ℃ of roasting temperature of charge controls in stove, and logical pressurized air sprays into sweetening agent CaO from furnace chamber top
3the lime powder compound with CaO, according to waste gas SO
2detected value is adjusted dry hydrate straying quatity, as SO in waste gas
2reach≤200mg/Nm of content
3emission standard time, the straying quatity of sweetening agent lime powder is about 0.8% of bone coal amount.
The present embodiment vanadium transformation efficiency reaches 72 ~ 78%, and roasting method more originally has on average improved 30.2 percentage points, saves the combustion-supporting high-quality bituminous coal that is equivalent to bone coal weight 3%, exhaust gas emission SO
2up to standard, on furnace roof without any irritating smell.
Embodiment 4:
Embodiment 4 is selected under same fluidizing furnace, same stone coal mine condition and carries out with embodiment 3, and sulphur-fixing agent is still selected identical Wingdale, and different is that coal catalyzer is selected commercially available ZC-6 moulded coal catalyzer, and sweetening agent is selected soda ash, comprises the following steps:
(1) raw materials pretreatment: be first crushed to≤10mm of bone coal material grain enters feed bin, ZC-6 moulded coal with catalyzer on the belt weighing balance drawing-in device under feed bin continuous uniform atomization be added on bone coal material grain, ZC-6 moulded coal is about 0.8% of bone coal with catalyst levels, entering the bone coal material grain of making before roasting in stove containing ZC-6 moulded coal catalyzer;
Gu sulphur temperature control agent limestone crushing to≤8mm particle enters granular Wingdale steel silo, Wingdale claims metering feeding with belt under storehouse, can directly deliver to bone coal material grain spout send in stoving oven by elephant trunk.
The sweetening agent soda ash under agitation soda ash aqueous solution of making mass percentage concentration 30% soluble in water is loaded in bucket, with pump duct coupling, to furnace chamber upper space, pipeline access pressurized air connects 12 atomizers to the furnace chamber upper chambers space settling pocket being connected with stove that joins with 12 hole pipes.
(2) desulphurizing roasting: the sending in fluidizing furnace by normal feeding manner with the bone coal material grain of catalyzer containing coal of preparation, add bituminous coal in stopping from fire door to stove combustion-supporting, adjustment fluidizing furnace gas blower is oxidizing atmosphere (non-reduced atmosphere) with air quantity to stove; Gu sulphur control agent Wingdale is sent in fluidizing furnace with bone coal material grain from bone coal material grain spout through elephant trunk, through test, adjust selected: amount of lime is about 4.5% of bone coal, 850 ~ 900 ℃ of roasting temperature of charge controls in stove, logical pressurized air sprays into soda ash solution from the pipeline atomization that is connected with furnace chamber top, according to waste gas SO
2detected value is adjusted soda ash solution straying quatity, as SO in waste gas
2reach≤200mg/Nm of content
3emission standard time, the straying quatity of sweetening agent soda ash is 0.18% of bone coal weight.
In above-mentioned desulphurizing roasting method operation, production test vanadium transformation efficiency reaches 75 ~ 82%, and roasting method more originally on average improves 34.3 percentage points, saves the combustion-supporting high-quality bituminous coal that is equivalent to bone coal weight 3%, exhaust gas emission SO
2up to standard, on furnace roof without any irritating smell.
Embodiment 5:
Vanadium extraction bone coal raw ore V
2o
5content is average 0.91%, the average 836 × 4.18KJ/kg of calorific value, sulphur content average 2.1%; Stoving oven adopts the circular fluid bed with cyclone, and stove inner bottom part air distribution plate is to the about 9m of headspace height.Processing method originally adopts intermittence to add calorific value 5100Kcal/kg left and right bituminous coal when roasting bone coal, on average add bituminous coal amount and be about 3% of bone coal, after roasting, slag inside is black or brown, and chemical analysis vanadium transformation efficiency fluctuates 49 ~ 58%, detects waste gas SO while not opening desulfurizer
2up to 2000mg/Nm
3above.
The coal of the present embodiment is selected commercially available ZC-5 moulded coal catalyzer with catalyzer, Gu the Wingdale of CaO content 97.3% is selected in the agent of sulphur temperature control, sweetening agent is selected dry hydrate, comprises the following steps:
(1) raw materials pretreatment: be first crushed to≤15mm of bone coal material grain enters feed bin, ZC-5 moulded coal with catalyzer on the belt weighing balance drawing-in device under feed bin continuous uniform atomization be added on bone coal material grain, ZC-5 moulded coal is about 0.2% of bone coal with catalyst levels, entering the bone coal material grain of making before roasting in stove containing ZC-5 moulded coal catalyzer;
Gu sulphur temperature control agent limestone crushing to≤10mm particle enters granular Wingdale steel silo, Wingdale claims metering feeding with belt under storehouse, can directly deliver to bone coal material grain spout send in stoving oven by elephant trunk.
Sweetening agent white lime is dry powder, after sieving, send into lime steel silo, under storehouse, with rigid impeller feeding machine and screw feeder interlocked control flow, the compressed-air actuated transport pipe of screw feeder outlet access is connected to circular fluid bed top, and point eight arms are communicated with stove internal upper part;
(2) desulphurizing roasting: sending in fluidizing furnace by normal feeding manner with the bone coal material grain of catalyzer containing coal of preparation, stop adding bituminous coal combustion-supporting, adjust gas blower and to stove, be oxidizing fire atmosphere (non-reduced atmosphere) with air quantity; Gu sulphur temperature control agent Wingdale is sent in fluidized-bed pot boiler with bone coal material grain from bone coal material grain spout through elephant trunk.Through test, adjust selected: amount of lime is about 4.5% of bone coal, 850 ~ 900 ℃ of roasting temperature of charge controls in stove, logical pressurized air sprays into sweetening agent dry hydrate from furnace chamber top, stops the operation of desulfurizer, according to waste gas SO
2online detected value is adjusted dry hydrate straying quatity, as SO in waste gas
2reach≤200mg/Nm of content
3emission standard time, the straying quatity of sweetening agent lime powder is about 0.8% of bone coal amount.
The present embodiment vanadium transformation efficiency reaches 67 ~ 76%, and roasting method more originally has on average improved 18.4 percentage points, saves the combustion-supporting high-quality bituminous coal that is equivalent to bone coal weight 3%, exhaust gas emission SO
2up to standard.
In this specification sheets, the per-cent that does not indicate especially unit is mass percent.
Claims (2)
1. a vanadium extraction bone coal desulphurizing roasting method, is characterized in that, comprises the following steps:
(1) raw materials pretreatment: coal is added in bone coal material with atomization dispersing mode before bone coal fragmentation or in fragmentation or after fragmentation with liquid form with catalyzer, or enter before stove roasting on drawing-in device or metering feed device or feed opening adds in bone coal material with atomization dispersing mode, described coal is 0.01 ~ 1.0% of bone coal quality with catalyst levels, make the bone coal material grain containing coal catalyzer, bone coal material particle size control≤25mm;
To consolidate the agent of sulphur temperature control and be crushed to granularity <15mm;
Sweetening agent is made to 80 μ m tail over≤30% powder, or the slip of water ratio >=50%, or the solution of mass concentration >=50%;
(2) desulphurizing roasting: step (1) gained is sent into roasting under 700 ~ 1050 ℃ of stoving oven inherences, non-reduced atmosphere containing coal with the bone coal material grain of catalyzer, described solid sulphur temperature control agent is sent in stoving oven, and described solid sulphur temperature control agent consumption is 0.5 ~ 10% of bone coal quality; Upper space by described sweetening agent in stoving oven to the area of space of fume sedimentation chamber sprays into, or the upper space in stoving oven sprays into cyclone area of space, and doctor solution consumption detects SO online according to waste gas
2value is adjusted straying quatity, with SO in waste gas
2content reaches emission standard value and is as the criterion;
Described coal catalyzer can promote bone coal oxidizing fire for containing, improves vanadium transformation efficiency, promote calcareous absorption SO
2generate CaSO
3and directional catalyzing CaSO
3be converted into CaSO
4the material ZC-5 of effect is catalyzer, ZC-6 catalyzer, stone coal combustion promotor or coal combustion promotor for moulded coal for moulded coal;
Described solid sulphur temperature control agent is Wingdale or rhombspar;
Described sweetening agent is a kind of in Wingdale, lime, soda ash, soda or two kinds.
2. according to vanadium extraction bone coal desulphurizing roasting method claimed in claim 1, it is characterized in that, described coal is 0.1～0.8% of bone coal quality with catalyst levels.
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| CN113801498A (en) * | 2021-10-13 | 2021-12-17 | 中国科学院过程工程研究所 | Clean roasting modification method for vanadium-containing shale |
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| CN1782108A (en) * | 2004-11-30 | 2006-06-07 | 戴许斌 | Method for producing vanadium by stone coal compound calcifying baking-low acid leaching-special ion exchanging |
| CN101177738A (en) * | 2006-11-10 | 2008-05-14 | 湖北汉海矿业投资有限公司 | Novel environment-protection compound additive roasted by bone coal vanadium ore |
| CN101240373A (en) * | 2007-02-05 | 2008-08-13 | 中南大学 | Chloride salt baking method for vanadium-containing stone coal |
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Application publication date: 20130724 Assignee: CHANGSHA ZICHEN TECHNOLOGY DEVELOPMENT CO., LTD. Assignor: Yin Xiaolin Contract record no.: 2015430000009 Denomination of invention: Desulfuration roasting method of vanadium-extraction stone coal Granted publication date: 20140416 License type: Exclusive License Record date: 20150323 |
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Effective date of registration: 20161209 Address after: 410205 Hunan city high tech Development Zone Changsha Changsha Wenxuan Road No. 27 Lu Valley Yuyuan D3-101 building two floor Patentee after: CHANGSHA ZICHEN TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 410013 Hunan province high tech Development Zone C2 group Binjiang fortune Silicon Valley building, room 5, building 510, room Patentee before: Yin Xiaolin |