CN101857915A - Pelletizing and calcination method for vanadium-containing stone coal ash - Google Patents
Pelletizing and calcination method for vanadium-containing stone coal ash Download PDFInfo
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Abstract
The invention relates to a pelletizing and calcination method for vanadium-containing stone coal ash. The equipment adopted by the method includes a moving-bed calcinator, which comprises a vertical furnace body, a chimney, a clinker discharger and a fan. The method includes the following steps that: NaCl, CaF2 and CaCO3 are prepared into complex additive, vanadium-containing stone coal, the complex additive and anthracite or stone coal as fuel needed by calcination are mixed into mixture material, the mixture material is uniformly mixed, fine-ground and pelletized into raw pellets, the raw pellets are fed into the furnace body via a feeder on the top of the furnace body, meanwhile, the fan blows the air into the furnace body via the clinker discharger on the bottom of the furnace body, the raw pellets and the air are calcined and reversely flow under the internal temperature condition of 800 DEG C to 900 DEG C, the calcined material enters the clinker discharger and is discharged out of the furnace body via the clinker discharger, and after cooling, clinker for the leaching of V2O5 is produced; and after calcination, the air is exhausted out via the chimney on the top of the furnace body. The technique and the equipment adopted by the method are relatively simple, the heat utilization rate is high, the product quality is stable, and the production cost is low.
Description
(1) technical field
The present invention relates to a kind of cindery pelletizing and calcination method of scherbinaite coal that contains
(2) background technology
Vanadium is a kind of important strategic goods and materials.The mankind just had been found that v element before 160 years, but just began to be applied on the industrial production up to 20 beginnings of the century.The pure metal vanadium is silver gray, has good ductility and erosion resistance.The product category of vanadium is various, and metallurgic products such as existing high purity vanadium metal, vanadium iron, vananum, vanadium carbide and vanadium carbonitride also have Vanadium Pentoxide in FLAKES, ammonium meta-vanadate, Chemicals such as potassium vanadate, vanadic acid sodium, vanadium hydroxide and vanadium chloride.Because vanadium has high-melting-point and easy deformation machining characteristics, is widely used in fields such as Iron And Steel Industry, national defence sophisticated technology, chemical industry and light and textile industries.Wherein the most important thing is to do the interpolation element in the steel and alloy, make chemical industry effective catalyst, activator.The vanadium steel that contains vanadium additive has very high hardness, wear resistance and bears the loading of large impact power, and has higher yield-point and plasticity-, is the main raw material(s) of automobile, aviation, machine manufacturing and transportation by railroad.
According to reports, the consumption iron and steel of vanadium accounts for 85% in the world, and non-ferrous metal accounts for 4%, and chemical industry and pottery account for 3%, and cast iron accounts for 1%, and other accounts for 2%.Therefore, influencing the supply and demand of vanadium and the factor of market value mainly is the production of iron and steel and vanadium alloy.When the production of Iron and Steel Production boom, particularly steel alloy increases substantially.The consumption of vanadium and international market price also increase gradually.At present, the China of potential consumption big country, the application of vanadium in steel is far below developed country, and this and China are that the status of production and consumption big country is unbecoming.Recent years, this gap is dwindled.Along with the fast development of new forms of energy, renewable energy technologies, a kind of vanadium cell technological development that is used for accumulation of energy is just at glad, and the application of vanadium cell will bring great demand to vanadium, we can say that the application market of vanadium and DEVELOPMENT PROSPECT will be good.
Vanadium is aboundresources, widely distributed metallic element in the world, and content is 0.015% in the earth's crust, can be but do not have separately for the rich ore of exploitation, and always with low-grade and other mineral paragenesis.Vanadium titano-magnetite and bone coal are the main raw materials of vanadium extraction, and the main raw material(s) of the vanadium of countries in the world production at present is the vanadium slag and the bone coal of vanadium titano-magnetite by-product in smelting process, and China is as the same.
In the v-ti magnetite ore resources of China, V
2O
5Total reserves be 1741.28 ten thousand tons, wherein Panzhihua Region has 1,600 ten thousand tons, accounts for V in the national vanadium titano-magnetite
2O
5More than 90% of total reserves.
Bone coal is a kind of carbonaceous shale that contains, and is the black caustobiolith that forms under reducing environment, belongs to the high sapanthracite of metamorphic grade more, is the shallow-sea facies settling.Its main characteristic is the ash height, and density is big, and thermal value is low, compact structure, and the point of ignition height, nonflammable and be difficult to perfect combustion.In China, bone coal is mainly composed and is stored in down in the Cambrian stratum, forms outside the material desilt, silicon of bone coal, the inorganic salt composition such as calcareous, and organic part mainly is the low forms of life, sponge and the still indefinite original animals and plants of some classification such as algae.Because the source difference of yeath land leftover in deposition process, complexing, the adsorption of matter planted in the corruption that formation condition of the low forms of life such as phycomycetes or putrescible phycomycetes produce, and the influences such as hydrothermal solution dip-dye of diagenesis, contain in the bone coal or compose the associated element that has collected more, as kind surplus vanadium, aluminium, iron, magnesium, calcium, nickel, molybdenum, uranium, copper, selenium, gallium, trowel and the precious metal etc. 60.In some layer position, one or more associated elements reach industry mining grade or cut-off grade separately, can be used as certain mineral wealth and exploit separately, and reclaim valuable component by smelting.
China is that unexpected the discovery has vanadium in the bone coal when generally investigating phosphorus ore the end of the fifties, and reserves are very abundant.Claim according to " southern bone coal resource comprehensive investigation report ": the total reserves of 10 provinces such as Hunan, Hubei, Zhejiang, Guangdong, Guangxi, Guizhou, Anhui, Henan, Shaanxi, autonomous region's bone coal resource is 618.8 hundred million tons, wherein proven reserve are 39.0 hundred million tons, and combining and examining reserves is 579.8 hundred million tons.Only in the bone coal ore deposit of 7 provinces such as Hunan, Hubei, Jiangxi, Zhejiang, Anhui, Guizhou, Shaanxi, V
2O
5Reserves just reach 11,797 ten thousand tons.W (V wherein
2O
5The reserves of)＞0.50% are 7705.5 ten thousand tons, are V in China's vanadium titano-magnetite
2O
56.7 times of total reserves surpass the total reserves of other various countries' vanadium of the world.Found in provinces and regions such as Xinjiang, Gansu also in recent years that reserves contained the scherbinaite coal than horn of plenty.
In the bone coal differ greatly in the grade various places of vanadium, is generally 0.13～1.00%, with regard to nationwide, in the bone coal grade of vanadium on average be lower than 0.5% account for 60%.V in the bone coal
2O
5Average grade and occupation rate see Table 1.
Table 1: the average grade of vanadium and occupation rate in the bone coal
| ??W(V 2O 5)％ | ??＜0.1 | ??0.1～0.3 | ??0.3～0.5 | ??0.5～1 | ??＞1 |
| Occupation rate % | ??3.1 | ??23.7 | ??33.6 | ??33.8 | ??2.8 |
The mineral composition of research bone coal shows: quartz is the essential mineral that constitutes bone coal, secondly is carbonaceous and clay mineral (kaolinite, mica mineral etc.), also has pyrite, garnet mineral and rhombspar etc.Other are a small amount of or trace quantity mineral is of a great variety, and various places are different.Vanadium in the bone coal is mainly composed in the mica minerals such as being stored in roscoelite, hydromica, biotite, white mica and illite, secondly is to compose to be stored in the mineral of other types such as some organic carbonaceous and ettringite garnet.
At present, China's process for extracting vanadium from stone coal mainly contains: sodium-salt calcination vanadium extraction, lime mud roasting vanadium extraction, calcium salt roasting vanadium extraction, composite additive roasting, wet method vanadium extraction, bone coal are directly acid-leaching vanadium-extracted, stone coal ash is directly acid-leaching vanadium-extracted etc.The bone coal mineral composition of China different areas is different very big, the roscoelite class mineral that contain of some areas are difficult to use existing processing method to break, therefore need develop and more have different adaptive vanadium extraction novel procesies, that handles different minerals character contains the scherbinaite coal.Extracting vanadium from stone coal at first will contain the fragmentation of scherbinaite coal usually, and the roasting decarburization obtains containing scherbinaite coal ash slag, again to contain the vanadium extraction of scherbinaite coal ash slag, at least will be through three master operations---sodium roasting, leaching, vanadium liquid purify and finally obtain V
2O
5, the total recovery of the most extracting vanadium from stone coal of the domestic industry is 40%～50% index normally, even the technology of big technological breakthrough is arranged in these three operations now, the total recovery of extracting vanadium from stone coal on average also only reaches about 60%.Sodium roasting is than critical step in these three steps, and sinter process and roasting apparatus thereof all have material impact to the conversion of vanadium.
CN 200910100872.4 discloses a kind of cindery roasting method of scherbinaite coal that contains, and described method comprises: to add quality be that NaCl, the quality that contains scherbinaite coal ash slag amount 1%～5% is the CaF that contains scherbinaite coal ash slag amount 2%～7% toward containing in the scherbinaite coal ash slag
2With quality be the CaCO that contains scherbinaite coal ash slag amount 10%～15%
3, mixing is finely ground to 80 orders～150 orders and obtains the raw material powder, and adding quality in the raw material powder is the water of raw material opaque amount 5%～40%, mixes the back thoroughly in 800～900 ℃ of following roasting 0.5h～3h, and cooling obtains grog and is used for V
2O
5Leaching (usually with the leaching of dilute hydrochloric acid or dilute sulphuric acid).This inventive method vanadium recovery height, simple to operate, cost is lower, of reduced contamination, but still have a following point:
1, after the raw material powder was mixed water, wet raw materials became irregular bulk.This is unfavorable for extensive continuous mechanized cloth and discharging.2, wet raw materials out-of-shape, and size is uneven.Cause the fluctuation of grog vanadium transformation efficiency, the quality instability.3, the raw material powder does not have thermal value.Add in the raw material powder and can make its fuel of keeping the enough time of high-temperature roasting, so need peripheral equipment to provide thermal source such as fuel oil, combustion gas, coal dust etc. could finish the re-baking process smoothly in the production.
At present, flat kiln is the roasting apparatus that China's sodium roasting vanadium-extracting technology mainly adopts, its main drawback is that transformation efficiency is low, energy consumption is high, floor space is big, mechanization degree is low etc., and most of private vanadium extraction factory is the maximizations of pursuit fund interests, untreated waste gas directly to airborne release, is done great damage to environment.Government department closes down the flat kiln production method of this type of high energy consumption, high pollution, poor efficiency just gradually.In recent years, rotary kiln replaces flat kiln gradually, becomes one of important vanadium extraction equipment of China.Rotary kiln has big, the mechanization degree advantages of higher of industrial scale, but still has many shortcomings.At first, the rotary kiln waste gas temperature is generally more than 600 ℃, and contains more acid attack gas in the waste gas, if directly will discharge after the off gas treatment, will significantly reduce efficiency of energy utilization; If waste gas residual heat is used, then must solve the difficult problem of heated surface corrosion in the UTILIZATION OF VESIDUAL HEAT IN.Secondly, the rotary kiln end clinker temperature generally about 500 ℃, cools off and recovery heat energy as need, certainly will be with the heat-exchange equipment before the increase kiln hood, and this has increased the complexity of device systems.
(3) summary of the invention
The technical problem to be solved in the present invention provides and contains the cindery pelletizing and calcination method of scherbinaite coal in a kind of extracting vanadium from stone coal process, and the technology that this method adopts is all relative with equipment simple, heat energy utilization rate height, and constant product quality, production cost is low.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of cindery pelletizing and calcination method of scherbinaite coal that contains, the equipment that described method adopts mainly comprises the moving-bed stoving oven, described moving-bed stoving oven comprises vertical body of heater, chimney, grog drawing mechanism and gas blower, the top of described body of heater is provided with feeding device, the bottom of described body of heater is provided with the grog dumping device, described grog drawing mechanism all is connected with the grog dumping device with gas blower, and described chimney is positioned at the body of heater top; Described method comprises: with NaCl, CaF
2And CaCO
3Form composite additive, with aluminiferous stone coal ash, composite additive, the required fuel hard coal of roasting or bone coal composition mixture material, wherein aluminiferous stone coal ash and NaCl, CaF
2And CaCO
3The mass ratio that feeds intake be 1: 1%～5%: 2%～7%: 10%～15%, the calorific value that hard coal or bone coal are allocated into is every kg mixture 1460～2100kJ, the mixture mixing is finely ground to 80 orders～150 orders obtains the raw material powder, adding quality in the raw material powder is the water of raw material opaque amount 8%～20%, granulation balling-up in balling head after the mechanical stirring obtains the raw material ball of sphere diameter 3～15mm; Described raw material ball adds body of heater from the feeding device at body of heater top, air blasts body of heater by gas blower via the grog dumping device simultaneously, raw material ball and air carry out roasting and countercurrent movement under the temperature condition in 800～900 ℃ stove, material after the roasting enters the grog dumping device of bottom of furnace body and discharges body of heater through the discharging of grog drawing mechanism, obtains being used for V after the cooling
2O
5The grog that leaches; Gas is then finally discharged from the chimney at body of heater top after the roasting.V
2O
5Leach usually with dilute hydrochloric acid or dilute sulphuric acid leaching.
The scherbinaite coal ash slag that contains of the present invention is prepared by following method: will contain the fragmentation of scherbinaite coal, and through 850～920 ℃ of burning decarburizations, obtain the described scherbinaite coal ash slag that contains.
Further, the preferred described scherbinaite coal ash slag that contains of the present invention: NaCl: CaF
2: CaCO
3The mass ratio that adds be 1: 2%～3%: 3%～5%: 12%～14%.
Further, the calorific value allocated into of preferred described hard coal of the present invention or bone coal is every kg mixture 1670～1880kJ.
Further, the present invention preferably is finely ground to the mixture mixing 80 orders～100 orders and obtains the raw material powder, and adding quality in the raw material powder is the water granulation balling-up of raw material opaque amount 10%～15%, obtains the raw material ball of sphere diameter 3～8mm.
Further, the preferred described raw material ball of the present invention in the moving-bed stoving oven in 830～850 ℃ of following roastings.
Pelletizing and calcination technology of the present invention be will contain the fragmentation of scherbinaite coal earlier, the bakes to burn the article decarburization obtains lime-ash, adds composite additive NaCl, CaF then
2And CaCO
3, levigate, add balling-up behind the water, obtain grog through moving-bed high temperature secondary roasting postcooling.In carbon rejection process, the crystalline structure that contains vanadium minerals in the bone coal is subjected to a certain degree destroying; In moving-bed re-baking process, composite additive can significantly destroy the crystalline structure that contains vanadium minerals in the stone coal ash, and vanadium is freed one's minds, and carries out the valence state conversion, becomes the high price vanadium ion that can be dissolved in dilution heat of sulfuric acid.CaCO wherein
3At high temperature can produce CO
2Gas makes pellet loose porous, helps contacting between pellet and gas, and fast reaction speed shortens the reaction times, improves the vanadium transformation efficiency; Calcium Fluoride (Fluorspan) can significantly be broken and contains the vanadium minerals structure; and the salt consumption is reduced significantly; reduce environmental pollution, though the grog that obtains with the inventive method has the residual of some amount villiaumite usually, this can't further leach the present invention, vanadium liquid purifies and has a negative impact.
The present invention directly adds the granulation balling-up of roasting institute's heat requirement (raw coal or bone coal) back in the raw material powder, have plurality of advantages.At first, overcome the irregular paste bulk of not balling-up wet raw materials and caused being unfavorable for defectives such as extensive mechanize cloth, roasting transformation efficiency fluctuate greatly, the outer refuel burning of palpus.Secondly, domestic existing sophisticated balling-up equipment carries out balling-up to the raw material powder, can realize scale operation, when this has satisfied the scale operation of moving-bed stoving oven to the demand of raw material; Once more, even by the raw material ball size of balling-up device fabrication, roasting time and easy control of temperature are by the grog stay in grade behind the moving-bed stoving oven re-baking; At last, the grog after the roasting is easy to realize the mechanize discharging.
The device that contains the cindery pelletizing and calcination method employing of scherbinaite coal of the present invention is called the moving-bed roasting system, described moving-bed roasting system comprises additive storage bin, cinder tank, coal bunker, metering feeding device, grinding device, balling head, moving-bed stoving oven, described additive storage bin, cinder tank, coal bunker connect a metering feeding device respectively alone, described additive storage bin, cinder tank, coal bunker are connected with grinding device separately, described grinding device is connected with balling head, and described balling head is connected with the feeding device of stoving oven.The moving-bed stoving oven that the present invention adopts, its similar is in cement in vertical kiln, and wherein the structure design of body of heater, grog dumping device, gas blower, feeding device etc. all can be with reference to cement in vertical kiln.
The working process of moving-bed roasting system of the present invention is: the hard coal that contains vanadium lime-ash, coal bunker or the bone coal of the composite additive of additive storage bin and lime-ash feed bin, feed grinding device through metering feeding device respectively by preset proportion, the raw material powder that mixes after levigate enters balling head, adds suitable quantity of water and make raw material ball in balling head.Raw material ball adds from the feeding device at body of heater top, and in body of heater, raw material ball is discharged body of heater through entering the grog dumping device behind preheating and drying band, oxidation clinkering zone, the cooling zone from top to bottom, emits grog through the grog drawing mechanism, is used for follow-up V
2O
5Leaching; Air from gas blower then blasts body of heater from the grog dumping device of x bottom of furnace body simultaneously, from bottom to top through cooling zone, oxidation clinkering zone, preheating and drying band, finally enters follow-up flare system after the chimney at body of heater top is discharged body of heater.
The use of this moving-bed stoving oven has following advantage among the present invention: at first, this stoving oven has the advantage of efficiently utilizing heat energy: moving-bed roasting characteristics are that the solid pellet moves from top to bottom, the oxidizing medium air moves from bottom to top, the gas-solid countercurrent movement, heat exchange is abundant, roasting transforms, waste gas heat utilization and grog UTILIZATION OF VESIDUAL HEAT IN are finished in stove simultaneously, the clinker temperature of discharging stoving oven can reach below 100 ℃, the spent air temperture of discharging can reach below 150 ℃, heat energy utilization rate height not only, the difficult problem of heated surface corrosion in the waste gas heat utilization in the time of also can avoiding with rotary kiln baking; Secondly, the moving-bed stoving oven has the simple advantage of device systems: gas-solid countercurrent movement in the moving-bed stoving oven, and roasting conversion, waste gas heat utilization and grog UTILIZATION OF VESIDUAL HEAT IN are finished in stove simultaneously, have removed outside UTILIZATION OF VESIDUAL HEAT IN equipment from, optimize device systems, reduced facility investment.
Compared with prior art, the beneficial effect of the inventive method is mainly reflected in:
1, the present invention adopts novel composite additive, to raw material powder granulation balling-up, has plurality of advantages.Composite additive closely contacts with raw material, has strengthened the chemical reaction degree of depth that additive transforms vanadium greatly; The fuel of allocating into (raw coal or bone coal) is evenly distributed in pellet, sufficient combustion, and heat energy utilization rate height, temperature is easy to control; Grog stay in grade after the roasting.
2, the moving-bed stoving oven of the present invention's employing has the following advantages: simple in structure, easy to manufacture, easy for installation; And the mechanization degree height, labour intensity is low; Roasting conversion and UTILIZATION OF VESIDUAL HEAT IN are finished in the moving-bed stoving oven simultaneously, need not join torrefaction waste gas UTILIZATION OF VESIDUAL HEAT IN equipment in addition, and energy consumption is low.Compare with flat kiln, transformation efficiency height, energy consumption are low, and the roasting process temperature is even, and it is good and stable to burn till clinker quality; Compare with rotary kiln, the solid pellet moves from top to bottom, the oxidizing medium air moves from bottom to top, heat exchange is abundant, UTILIZATION OF VESIDUAL HEAT IN is fully finished in stove, heat energy utilization rate height not only, the difficult problem of heated surface corrosion in the waste gas heat utilization in the time of more can avoiding roasting, and do not need the extra fuel combustion equipment, technology and equipment thereof are simple relatively.
(4) description of drawings
Fig. 1 is the device synoptic diagram of the employed moving-bed roasting system of the embodiment of the invention, 1 grinding device wherein, 2 metering feeding devices, 3 coal bunkers, 4 cinder tanks, 5 additive storage bin, 6 balling heads, 7 chimneys, 8 bodies of heater, 9 grog dumping device, 10 Root's blowers, 11 grog drawing mechanisms.
(5) embodiment
The present invention is described further below in conjunction with specific embodiment, but protection scope of the present invention is not limited in this:
In the accompanying drawing 1, described moving-bed roasting system comprises additive storage bin 5, cinder tank 4, coal bunker 3, metering feeding device 2, grinding device 1, balling head 6, moving-bed stoving oven.Described moving-bed stoving oven comprises vertical body of heater 8, chimney 7, grog drawing mechanism 11 and Root's blower 10, and the top of described body of heater 8 is provided with feeding device, and described feeding device comprises transmission rig and revolution spreading scraper-trough conveyer; The bottom of described body of heater 8 is provided with grog dumping device 9, described grog dumping device 9 is the tower grate structure, be made of jaw, two eccentric discharging awl and transmission mechanism, the transmission shaft of the transmission mechanism of described grog dumping device 9 is interior hollow, links to each other with Root's blower 10.Described grog drawing mechanism 11 is connected with grog dumping device 9, and described chimney is positioned at the body of heater top.Described balling head 6 is made up of pan-pelletizer and motor.
Described additive storage bin 5, cinder tank 4, coal bunker 3 connect a metering feeding device 2 respectively alone, described additive storage bin 5, cinder tank 4, coal bunker 3 are connected with grinding device 1 separately, described grinding device 1 is connected with balling head 6, and described balling head 6 is connected with the feeding device of stoving oven.
Embodiment 1:
(its chemical ingredients is: V to be taken in the large-size circulating fluidized bed testing table of the 1MW of Thermal Power Engineering institute of Zhejiang University stone coal ash 15kg after 890～910 ℃ of burning decarburizations
2O
51.39%, SiO
267.04%, Fe
2O
37.65%, Al
2O
317.84%, CaO 1.64%, and MgO 1.94%), add composite additive, comprise the NaCl of 0.3kg, the CaF of 0.75kg
2CaCO with 2.1kg
3, adding hard coal 1.05kg, mixture calorific value 1898kJ/kg mixes and is milled down to the following raw material powder that gets of 80 orders, adds the entry balling-up then, and pellet contains moisture 17%, sphere diameter 5～8mm.Pellet is at internal diameter 120mm, the laboratory moving-bed roasting test furnace roof portion of height 1000mm adds, at 830～850 ℃ of roasting 2h, discharge grog through cooling back, stoving oven bottom, grog is levigate back is 2% in volumetric concentration, the ratio of solid masses (kg) and liquid volume (L) is that stirring at normal temperature is leached 30min in 1: 2.5 the dilution heat of sulfuric acid.Analyze V
2O
5Leaching yield is 73.98%.
Embodiment 2:
(its chemical ingredients is: V to be taken in the large-size circulating fluidized bed testing table of the 1MW of Thermal Power Engineering institute of Zhejiang University stone coal ash 15kg after 890～910 ℃ of burning decarburizations
2O
51.39%, SiO
267.04%, Fe
2O
37.65%, Al
2O
317.84%, CaO 1.64%, and MgO 1.94%), add composite additive, comprise the NaCl of 0.3kg, the CaF of 0.75kg
2CaCO with 2.1kg
3, adding hard coal 0.9kg, mixture calorific value 1626kJ/kg mixes and is milled down to the following raw material powder that gets of 80 orders, adds the entry balling-up then, and pellet contains moisture 14.5%, sphere diameter 5～8mm.Pellet is at internal diameter 120mm, the laboratory moving-bed roasting test furnace roof portion of height 1000mm adds, at 820～840 ℃ of roasting 2.5h, discharge grog through cooling back, stoving oven bottom, grog is levigate back is 2% in volumetric concentration, the ratio of solid masses (kg) and liquid volume (L) is that stirring at normal temperature is leached 30min in 1: 2.5 the dilution heat of sulfuric acid.Analyze V
2O
5Leaching yield is 76.14%.
Embodiment 3:
(its chemical ingredients is: V to be taken in the large-size circulating fluidized bed testing table of the 1MW of Thermal Power Engineering institute of Zhejiang University stone coal ash 15kg after 890～910 ℃ of burning decarburizations
2O
51.39%, SiO
267.04%, Fe
2O
37.65%, Al
2O
317.84%, CaO 1.64%, and MgO 1.94%), add composite additive, comprise the NaCl of 0.3kg, the CaF of 0.75kg
2CaCO with 2.1kg
3, adding the preceding bone coal 3.575kg of decarburization, mixture calorific value 1643kJ/kg mixes and is milled down to the following raw material powder that gets of 80 orders, adds the entry balling-up then, and pellet contains moisture 16.5%, sphere diameter 5～8mm.Pellet is at internal diameter 120mm, the laboratory moving-bed roasting test furnace roof portion of height 1000mm adds, at 825～845 ℃ of roasting 2.5h, discharge grog through cooling back, stoving oven bottom, grog is levigate back is 2% in volumetric concentration, the ratio of solid masses (kg) and liquid volume (L) is that stirring at normal temperature is leached 30min in 1: 2.5 the dilution heat of sulfuric acid.Analyze V
2O
5Leaching yield is 76.44%.
Claims (7)
1. one kind contains the cindery pelletizing and calcination method of scherbinaite coal, the equipment that described pelletizing and calcination method adopts comprises the moving-bed stoving oven, described moving-bed stoving oven comprises vertical body of heater, chimney, grog drawing mechanism and gas blower, the top of described body of heater is provided with feeding device, the bottom of described body of heater is provided with the grog dumping device, described grog drawing mechanism all is connected with the grog dumping device with gas blower, and described chimney is positioned at the body of heater top; Described pelletizing and calcination method comprises: with NaCl, CaF
2And CaCO
3Form composite additive, with aluminiferous stone coal ash, composite additive, the required fuel hard coal of roasting or bone coal composition mixture material, wherein aluminiferous stone coal ash and NaCl, CaF
2And CaCO
3The mass ratio that feeds intake be 1: 1%～5%: 2%～7%: 10%～15%, the calorific value that hard coal or bone coal are allocated into is every kg mixture 1460～2100kJ, the mixture mixing is finely ground to 80 orders～150 orders obtains the raw material powder, adding quality in the raw material powder is the water of raw material opaque amount 8%～20%, granulation balling-up in balling head after the mechanical stirring obtains the raw material ball of sphere diameter 3～15mm; Described raw material ball adds body of heater from the feeding device at body of heater top, air blasts body of heater by gas blower via the grog dumping device simultaneously, raw material ball and air carry out roasting and countercurrent movement under the temperature condition in 800～900 ℃ stove, material after the roasting enters the grog dumping device of bottom of furnace body and discharges body of heater through the discharging of grog drawing mechanism, obtains being used for the grog that V2O5 leaches after the cooling; Gas is then finally discharged from the chimney at body of heater top after the roasting.
2. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 1 is characterized in that the described scherbinaite coal ash slag that contains is prepared by following method: will contain the fragmentation of scherbinaite coal, and through 850～920 ℃ of burning decarburizations, obtain the described scherbinaite coal ash slag that contains.
3. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 1 or 2 is characterized in that the described scherbinaite coal ash slag that contains: NaCl: CaF
2: CaCO
3The mass ratio that adds be 1: 2%～3%: 3%～5%: 12%～14%.
4. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 1 or 2, the calorific value of allocating into that it is characterized in that described hard coal or bone coal are every kg mixture 1670～1880kJ.
5. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 1 or 2, it is characterized in that the mixture mixing is finely ground to 80 orders～100 orders obtains the raw material powder, it is the water granulation balling-up of raw material opaque amount 10%～15% that described raw material powder adds quality, obtains the raw material ball of sphere diameter 3～8mm.
6. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 1 or 2 is characterized in that in body of heater pellet and gas carry out roasting under the temperature condition in 830～850 ℃ stove.
7. the cindery pelletizing and calcination method of scherbinaite coal that contains as claimed in claim 5, it is characterized in that the device that described pelletizing and calcination method adopts also comprises additive storage bin, cinder tank, coal bunker, metering feeding device, grinding device, balling head, described additive storage bin, cinder tank, coal bunker connect a metering feeding device respectively alone, described additive storage bin, cinder tank, coal bunker are connected with grinding device separately, described grinding device is connected with balling head, and described balling head is connected with the feeding device of stoving oven.
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| CN102060328A (en) * | 2010-11-04 | 2011-05-18 | 北京科技大学 | Method for completely recycling vanadium-containing stone coal |
| CN102162041A (en) * | 2011-05-26 | 2011-08-24 | 吴道洪 | Method for roasting vanadium-containing stone coal by rotary hearth furnace |
| CN102296192A (en) * | 2011-09-20 | 2011-12-28 | 武汉工程大学 | Composite roasting additive for extracting vanadium pentoxide from vanadium-containing stone coal and application of composite roasting additive |
| CN102534193A (en) * | 2012-02-27 | 2012-07-04 | 彭武星 | Method for decarbonizing and calcining vanadium-containing stone coal |
| CN102560155A (en) * | 2012-02-22 | 2012-07-11 | 广西冶金研究院 | Method for extracting vanadium from stone coal vanadium ore by using calcium compound additive |
| CN106244808A (en) * | 2016-08-11 | 2016-12-21 | 攀钢集团西昌钢钒有限公司 | Powder vanadium-containing material reclaims the method for vanadium |
| CN110173975A (en) * | 2019-06-28 | 2019-08-27 | 攀钢集团钒钛资源股份有限公司 | Vanadium slag pellet dries distribution device |
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| CN102560155A (en) * | 2012-02-22 | 2012-07-11 | 广西冶金研究院 | Method for extracting vanadium from stone coal vanadium ore by using calcium compound additive |
| CN102534193A (en) * | 2012-02-27 | 2012-07-04 | 彭武星 | Method for decarbonizing and calcining vanadium-containing stone coal |
| CN106244808A (en) * | 2016-08-11 | 2016-12-21 | 攀钢集团西昌钢钒有限公司 | Powder vanadium-containing material reclaims the method for vanadium |
| CN110173975A (en) * | 2019-06-28 | 2019-08-27 | 攀钢集团钒钛资源股份有限公司 | Vanadium slag pellet dries distribution device |
| CN110173975B (en) * | 2019-06-28 | 2024-03-29 | 攀钢集团钒钛资源股份有限公司 | Vanadium slag ball stoving distributing device |
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