CN101172652B - Alum mine calcium method marching type roasting method and roasting furnace - Google Patents
Alum mine calcium method marching type roasting method and roasting furnace Download PDFInfo
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- CN101172652B CN101172652B CN2007100359870A CN200710035987A CN101172652B CN 101172652 B CN101172652 B CN 101172652B CN 2007100359870 A CN2007100359870 A CN 2007100359870A CN 200710035987 A CN200710035987 A CN 200710035987A CN 101172652 B CN101172652 B CN 101172652B
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Abstract
The invention relates to a stepping roasting method and a roasting oven thereof with alum mine calcium. The method is characterized in that composite additive which is made of calcium oxide or calcium carbonate and calcium fluoride and calcium oxide is added into ores, and then is crushed into a vacuum title type slab; and finally the slab is roasted step by step from low temperature to high temperature. The roasting oven comprises a lie-down straight or circular oven (1), wherein, the oven (1) is provided with draft fans (10) and (11) which are communicated with the cavities of front segment and back segment of the oven. The oven is externally provided with blowers (13) and (14) which are communicated with the cavity of the oven. Fire spraying nozzles (12) are distributed all over the two sides of the inner wall at the middle segment and the top of the oven, and each fire spraying nozzle (12) is respectively communicated with a gas pipeline (15) outside of the oven. The invention is characterized in that the roasting conversion rate reaches more than 80 to 85 percent; no poisonous gas is produced in the production process; and has good sulfur solidifying effect on sulfur dioxide which is produced in the ores roasting process, thereby greatly decreasing the air pollution. The roasting oven has the advantages of simple structure, low production cost and easy installation.
Description
Technical field
The present invention relates to from navajoite, extract the technology of Vanadium Pentoxide in FLAKES, a kind of alum ore deposit roasting method particularly is provided.The invention still further relates to a kind of alum ore deposit stoving oven.
Background technology
At present, the extracting vanadium from stone coal technology that in industry, adopts mainly contains with salt roasting vanadium extraction technology (comprising the less salt roasting technology), saltless roasting technology (not adding any additives) and strong acid and leaches the vanadium extraction technology.In the ore roasting process, add Industrial Salt (sodium-chlor) with salt roasting vanadium extraction Technology Need, contain hydrogenchloride and chlorine in the baking flue gas, seriously polluted, and also the Industrial Salt consumption is very big, belongs to the backwardness technology of eliminating of drawing of closing down of banning.The saltless roasting technology has very strong selectivity to ore, and only the local ore of minority is suitable for, and does not possess industrialized popularization value.The strong acid leaching-out technique comprises strong acid leaching-out technique and no roasting strong acid leaching-out technique after the ore roasting.Though no roasting strong acid leaching-out technique vanadium extraction technology has the advantage that does not need roasting process, sour consumption is big, and production cost is high, and water is seriously polluted, and also selective to ore.One Chinese patent application discloses " a kind of method of from navajoite stone, extracting Vanadium Pentoxide in FLAKES " (200510032012.3), has adopted the technology of adding unslaked lime and the assorted sodium polyphosphate of ethyl in the roasting process, can reduce pollution, improves the yield of vanadium.But generally speaking, the transformation efficiency of vanadium still is not very high, causes the ore waste.
Goal of the invention
In order to overcome the deficiency that existing navajoite extracts the Vanadium Pentoxide in FLAKES technology, the object of the present invention is to provide a kind of alum mine calcium method marching type roasting method, it not only pollutes little, and cost is low, and can improve the yield of vanadium in the ore greatly.The present invention also provides a kind of special calcination furnace of alum mine calcium method marching type roasting method.
For achieving the above object, embodiment of the present invention are: a kind of alum mine calcium method marching type roasting method may further comprise the steps:
(1), with ore oven dry, decarburization, slightly broken then, granularity is controlled at below the 10mm;
(2), add quicklime and composite additive in the ore after thick breaking; Or add lime carbonate and composite additive in the ore after thick breaking; The add-on of quicklime or lime carbonate is 2～20% of an ore weight; Said composite additive is Calcium Fluoride (Fluorspan) and quicklime, and the weight proportion of Calcium Fluoride (Fluorspan) and quicklime is a Calcium Fluoride (Fluorspan): quicklime=1: 5～10, the add-on of composite additive are 3～6% of ore weight;
(3), mixed material is pulverized, cross 60～100 orders, it is moistening to add water, empty bulk in processing, and oven dry;
(4), the material of moulding is carried out marching type roasting, said marching type roasting is divided into preheating, low-temperature bake, three processes of high-temperature roasting, 200～600 ℃ of preheating temperatures, 3.5～4.5 hours time; 600～800 ℃ of low-temperature bake temperature, 11～13 hours time; 800-1000 ℃ of high-temperature roasting temperature, 5.5～6.5 hours time.
In the step (1), if the ore thermal value is lower than 600 kcal/kg, through the oven dry of rotary type drying oven, ore after the oven dry and thermal value merge greater than 600 kcal/kg ores with ore, pulverize, and granularity is controlled at below the 4mm, and then uses the fluidizing furnace decarburization.
In the step (3), material is preferably processed the brick type bulk of honeycomb briquette formula.
In the step (4), roasting is fuel used to be coal gas or Sweet natural gas.
Alum provided by the invention ore deposit calcium method marching type roasting stove; The straight ring shape body of heater that comprises horizontal; Be respectively equipped with on the body of heater with body of heater leading portion and back segment in the induced draft fan of empty UNICOM; Inwall both sides, body of heater stage casing and top spread all over and are provided with bocca, body of heater be provided with outward with body of heater in the gas blower of air distance UNICOM, all outer with the being located at body of heater gas pipeline of each bocca communicates.
Said body of heater is divided into dryer section, preheating section, low-temperature zone, high temperature section, five warm areas of cooling section successively from the feed end to the discharge end, bocca is arranged on low-temperature zone and high temperature section, and the ignition tip at high temperature section place distributes closeer than the ignition tip distribution of low-temperature zone.
Said bottom of furnace body is provided with materials vehicle and advances track.
Said induced draft fan is logical through Kongxiang in a plurality of induced exhausts and the body of heater, and gas blower is logical through Kongxiang in a plurality of tweres and the body of heater.
The present invention is owing to adopted the method for calcium method roasting; Do not have and produce with toxic gases such as hydrogenchloride in the salt roasting technology and chlorine; And can have good solid sulphur effect to the sulfurous gas that mineral produce in roasting process, therefore can reduce pollution greatly to air.The bulk of sky in ore is processed, and adopt the step-type roasting mode of segmentation, ore is reacted more fully, improve the yield of vanadium in the ore, the roasting transformation efficiency reaches more than 80～85%.Special calcination furnace provided by the invention is simple in structure, and cost of manufacture is lower, is easy to install.
Description of drawings
Accompanying drawing is the structure iron of alum provided by the invention ore deposit calcium method marching type roasting stove.
Among the figure, the 1-body of heater, 2-advances track, 3-feed end; The 4-discharge end, 5-dryer section, 6-preheating section, 7-low-temperature zone, 8-high temperature section, 9-cooling section, 10-induced draft fan, 11-induced draft fan; The 12-ignition tip, 13, the 14-gas blower, 15-gas pipeline, 16-induced exhaust; The 17-gas blower, 18-twere, 19-materials vehicle.
Embodiment
Alum ore deposit calcium method composite additive method marching type roasting, concrete steps are following:
(1), ore pre-treatment: second class ore; After analyzing and testing; According to characteristic pile up separately such as the grade of ore, thermal value, moisture,, dry by rotary dryer after just broken through jaw is broken for the high bone coal ore deposit of water cut (thermal value is lower than 600 kcal/kg); Just broken then, below the granularity 10mm; For the lower ore of water cut (thermal value is higher than 600 kcal/kg), be crushed to about 50mm through the one-level jaw, two-stage crushing is to the granularity 5mm then.The breeze that aforesaid method is handled merges, and separately deposits in 30% and 70% ratio, the stoving oven that directly advances to prepare burden after the 30% part metering wherein, and 70% part is sent into fluidized-bed combustion, to lower the thermal value of ore;
(2), mix, take by weighing unslaked lime and composite additive respectively in the ratio of breeze weight 10% and 4%, send into the ball mill grinding together with breeze, properties of powder performace is controlled at about 80 orders with above-mentioned 30% breeze with through 70% breeze of burn processing.Composite additive is unslaked lime and Calcium Fluoride (Fluorspan), and the weight proportion of unslaked lime and Calcium Fluoride (Fluorspan) is 8: 1;
(3), that step (2) gained mixed mineral powder is added water is moistening, sends into the brick type that shaper is processed the honeycomb briquette formula, is stacked on the materials vehicle, the leading portion (oven dry section) that gets into roasting special calcination furnace provided by the invention is dried dry 100～200 ℃;
(4), the brick type material with oven dry advances the preheating section of roasting special calcination furnace to carry out preheating, about 500 ℃ of temperature, 4 hours time; And then the low-temperature zone that pushes the roasting special calcination furnace is carried out low-temperature bake, 700 ℃ of temperature, 12 hours time; The high temperature section that pushes the roasting special calcination furnace is again carried out high-temperature roasting, 950 ℃ of temperature, 6 hours time; The cooling section that pushes the roasting special calcination furnace then cools off, and the time is more than 2 hours.
Shown in accompanying drawing, said alum ore deposit calcium method marching type roasting stove has the straight shape body of heater 1 of horizontal type, and bottom of furnace body is provided with and advances track 2.Body of heater 14 is divided into five temperature sections from feed end 3 to discharge end; Be respectively dryer section 5, preheating section 6, low-temperature zone 7, high temperature section 8, cooling section 9; Dryer section length 60-80 rice, preheating section 6 length by length 20-30 rice, low-temperature zone length 30-50 rice; High temperature section length 70-100 rice, cooling section length 20-30 rice.Above dryer section 5, preheating section 6, be provided with induced draft fan 10, cooling section 9 tops are provided with induced draft fan 11, and induced draft fan 10 and 11 has a plurality of induced exhausts 16 evenly to extend in dryer section 5, preheating section 6 and the cooling section 9 of body of heater 1.Spread all at the inwall both sides of low-temperature zone of body of heater 17 and high temperature section 6 and top and to be provided with ignition tip 12; Ignition tip 12 be arranged on low-temperature zone 7 and high temperature section 6 top gas pipelines 15 UNICOMs, the ignition tip 12 that the ignition tip 12 at high temperature section 8 places distributes than low-temperature zone 8 distributes closeer.Position near low-temperature zone 7 and high temperature section 8 on the body of heater 1 is respectively equipped with gas blower 13,14.The top of cooling section 9 is provided with gas blower 17, and gas blower 13,14,17 is all through empty UNICOM in a plurality of tweres 18 and the body of heater 1.The stoving oven of said alum ore deposit calcium method marching type roasting method, it is horizontal that its body of heater also can be designed to ring-shaped flat, and its opening for feed and discharge port design are at same position.Induced draft fan 10 is used for the heat energy of low-temperature zone 7 and high temperature section 8 is guided to dryer section 5 and preheating section 6, and discharges flue gas.Induced draft fan 11 is used to discharge the flue gas of body of heater back segment.
When using this roasting special calcination furnace to carry out the navajoite roasting; At first the material with moulding neatly is deposited on the materials vehicle 19; Along advancing track 2 to advance this dryer section 5, preheating section 6, low-temperature zone 7, high temperature section 8 and cooling section 9 to carry out drying, preheating, low-temperature bake, high-temperature roasting and cooling successively, temperature can be regulated through the size of the on-off control gas quantity that is provided with on the gas line in the stove.
Claims (4)
1. an alum mine calcium method marching type roasting method is characterized in that, may further comprise the steps:
(1), with ore oven dry, decarburization, slightly broken then, granularity is controlled at below the 10mm;
(2), add quicklime and composite additive in the ore after thick breaking; Or add lime carbonate and composite additive in the ore after thick breaking; The add-on of quicklime or lime carbonate is 2～20% of an ore weight; Said composite additive is Calcium Fluoride (Fluorspan) and quicklime, and the weight proportion of Calcium Fluoride (Fluorspan) and quicklime is a Calcium Fluoride (Fluorspan): quicklime=1: 5～10, the add-on of composite additive are 3～6% of ore weight;
(3), mixed material is pulverized, cross 60～100 orders, it is moistening to add water, empty bulk in processing, and oven dry;
(4), the material of moulding is carried out marching type roasting, said marching type roasting is divided into preheating, low-temperature bake, three processes of high-temperature roasting, 200～600 ℃ of preheating temperatures, 3.5～4.5 hours time; 600～800 ℃ of low-temperature bake temperature, 11～13 hours time; 800-1000 ℃ of high-temperature roasting temperature, 5.5～6.5 hours time.
2. alum mine calcium method marching type roasting method according to claim 1 is characterized in that, in the step (1); If the ore thermal value is lower than 600 kcal/kg; Through the oven dry of rotary type drying oven, ore after the oven dry and thermal value merge greater than 600 kcal/kg ores with ore, pulverize; Granularity is controlled at below the 4mm, and then uses the fluidizing furnace decarburization.
3. alum mine calcium method marching type roasting method according to claim 1 is characterized in that, in the step (3), material is processed the brick type bulk of honeycomb briquette formula.
4. alum mine calcium method marching type roasting method according to claim 1 is characterized in that, in the step (4), roasting is fuel used to be coal gas or Sweet natural gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2007100359870A CN101172652B (en) | 2007-10-29 | 2007-10-29 | Alum mine calcium method marching type roasting method and roasting furnace |
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| CN2007100359870A CN101172652B (en) | 2007-10-29 | 2007-10-29 | Alum mine calcium method marching type roasting method and roasting furnace |
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| CN101172652A CN101172652A (en) | 2008-05-07 |
| CN101172652B true CN101172652B (en) | 2012-03-21 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215648B (en) * | 2008-01-18 | 2011-12-28 | 贵州义信矿业有限公司 | Composite additive used for extracting vanadium from vanadium stone coal ore and using method thereof |
| WO2011027042A1 (en) * | 2009-09-07 | 2011-03-10 | Solios Carbone | Method for characterizing the combustion in lines of partitions of a furnace having rotary firing chamber(s) |
| CN101830709A (en) * | 2010-04-15 | 2010-09-15 | 竹山中强钒业制造有限公司 | Process method for roasting vanadium pentoxide |
| CN102628098B (en) * | 2012-04-25 | 2013-04-24 | 彭武星 | Boiler with decarbonization and roasting processes for refining vanadium pentoxide |
| CN103614544A (en) * | 2013-11-07 | 2014-03-05 | 河南盛锐钒业集团有限公司 | Clean roasting process for extracting vanadium pentoxide from vanadium-containing ore through progressive-kiln calcification roasting |
| CN104357660B (en) * | 2014-10-17 | 2016-08-31 | 东北大学 | A kind of method cleaning production vanadic anhydride |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674975A (en) * | 1984-09-28 | 1987-06-23 | Alusuisse Italia S.P.A. | Method and tunnel type furnace for calcining carbonaceous bodies, in particular electrodes |
| CN1341759A (en) * | 2001-08-14 | 2002-03-27 | 韦文虎 | Process for extracting vanadium |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4674975A (en) * | 1984-09-28 | 1987-06-23 | Alusuisse Italia S.P.A. | Method and tunnel type furnace for calcining carbonaceous bodies, in particular electrodes |
| CN1341759A (en) * | 2001-08-14 | 2002-03-27 | 韦文虎 | Process for extracting vanadium |
Non-Patent Citations (1)
| Title |
|---|
| 邹晓勇 等.含钒石煤复合添加剂焙烧法生产五氧化二钒工艺的研究.《湖南冶金》.2005,第33卷(第5期),3-5，9. * |
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