CN102627325B - Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln - Google Patents
Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln Download PDFInfo
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- CN102627325B CN102627325B CN201210122657.6A CN201210122657A CN102627325B CN 102627325 B CN102627325 B CN 102627325B CN 201210122657 A CN201210122657 A CN 201210122657A CN 102627325 B CN102627325 B CN 102627325B
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Abstract
The invention discloses a method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using a rotary kiln. The method comprises the step of feeding the vanadium-containing stone coal decarburized materials into the rotary kiln for re-decarburization and roasting treatment; the decarburized materials are high-temperature vanadium-containing stone coal decarburized materials which are directly discharged by a previous process device and are at temperature higher than 700 DEG C; and in the re-decarburization and roasting treatment process, high-temperature gas and/or normal-temperature gas at temperature above 650 DEG C are/is blown into the high-temperature vanadium-containing stone coal decarburized materials in the rotary kiln. Methods for blowing the high-temperature gas and/or normal-temperature gas into the rotary kiln comprise a method of blowing the gas from the side surface of the rotary kiln, a method of blowing the gas from the feed inlet of the rotary kiln and a method of blowing the gas from the discharge outlet of the rotary kiln. The three methods can be solely used or jointly used. The method disclosed by the invention has the advantages that the combination of raw material heating, decarburization and roasting processes is scientific and reasonable, the roasting temperature is easy to control, the situation of coking is not apt to occur during roasting, the energy consumption is low, the vanadium conversion rate is high, the yield is high and the pollution is small.
Description
Technical field
The present invention relates to from the method containing refining Vanadium Pentoxide in FLAKES vanadium material, particularly relate to and a kind ofly directly high temperature decarburization material being processed, the method with rotary kiln to the capable decarburization again of Rock coal containing alum decarburization material and roasting.
Background technology
Adopt at present the method for rotary kiln to the capable decarburization again of Rock coal containing alum decarburization material and roasting, be the decarburization material that first front operation device ejected as boiler cooling after, then with normal temperature, enter rotary kiln, then as roasting cement, process.Its weak point: the roasting that heats up again after decarburization material that front operation device ejects as boiler is cooling, heat energy consumption is large, and the production cycle is long, and production efficiency is low, and production cost is low, and the turnover ratio of vanadium is low.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, the method to the capable decarburization again of Rock coal containing alum decarburization material and roasting with rotary kiln of high temperature decarburization material, that can save the energy, the turnover ratio that can improve vanadium that operation device before a kind of direct utilization ejects as boiler is provided.
Object of the present invention is achieved by following technical proposals: described method is that the decarburization material of Rock coal containing alum is sent into and in rotary kiln, carried out decarburization again and calcination process; Described decarburization material is that former process device is directly discharged, temperature is higher than the decarburization material of the high temperature Rock coal containing alums of 700 degree Celsius; In the process of described decarburization again and calcination process, in the decarburization material of the high temperature Rock coal containing alum in rotary kiln, be blown into high-temperature gas and/or gas at normal temperature more than 650 degree Celsius.
The mode that described high-temperature gas and/or gas at normal temperature are blown in rotary kiln is:
(1) from the side of rotary kiln, be blown into;
(2) from the opening for feed of rotary kiln, be blown into;
(3) from rotary kiln discharge port, be blown into;
Above three kinds of modes can be used singly or in combination.
Tracheae decoration form when described high-temperature gas and/or gas at normal temperature are blown into from the side of rotary kiln is:
(1) described tracheae is arranged along the axial inwall of rotary kiln, and quantity is at least three, arranges on several gas orifices or tracheae at least one nozzle is installed on every tracheae, and at least one gas orifice is set on each nozzle; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different;
(2) described tracheae is arranged along the axial outer wall of rotary kiln, and quantity is at least three, and at least one nozzle is installed on every tracheae, has a gas orifice on each nozzle at least; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different.
Described tracheae is along the axial division of rotary kiln Liang Ge working group at least, and the tracheae of each working group configures independently air supply controller, and air supply controller is connected with high-temperature gas and/or gas at normal temperature.
Described rotary kiln is divided into two workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the discharge end of rotary kiln, this workspace is depth decarburization preliminary roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, controls the thermal value of rotary kiln discharge port material lower than per kilogram 30 kilocalories.
Or, described rotary kiln is divided into three workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the intermediate ends of rotary kiln, this workspace is depth decarburization roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, and the time of depth decarburization and roasting is 90-240 minute; The 3rd workspace is positioned at the discharge end of rotary kiln, and this workspace is cooling area, in material, supplies normal temperature air, and the temperature of charge of discharging is dropped to below 730 degree Celsius.
Described temperature reaches and maintains the method for 800-900 degree Celsius: control independently air supply controller of each working group, to the high-temperature gas and/or the gas at normal temperature that spray into appropriate or excessive differing temps, different oxygen level in material.
Described high-temperature gas is high temperature air, or high-temperature oxygen-enriched, or high-temperature flue gas, or mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Air or the oxygen enrichment of described high temperature air or the high-temperature oxygen-enriched waste-heat for operation device before utilizing and rotary kiln.
Compared with prior art, the present invention has the following advantages: craft science is reasonable, can save the energy, enhances productivity and vanadium turnover ratio, can significantly reduce production costs.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Described method is that the decarburization material of Rock coal containing alum is sent into and in rotary kiln, carried out decarburization again and calcination process; Described decarburization material is that former process device is directly discharged, temperature is higher than the decarburization material of the high temperature Rock coal containing alums of 700 degree Celsius; In the process of described decarburization again and calcination process, in the decarburization material of the high temperature Rock coal containing alum in rotary kiln, be blown into high-temperature gas and/or gas at normal temperature more than 650 degree Celsius.
The mode that described high-temperature gas and/or gas at normal temperature are blown in rotary kiln is:
(1) from the side of rotary kiln, be blown into;
(2) from the opening for feed of rotary kiln, be blown into;
(3) from rotary kiln discharge port, be blown into;
Above three kinds of modes can be used singly or in combination.
Tracheae decoration form when described high-temperature gas and/or gas at normal temperature are blown into from the side of rotary kiln is:
(1) described tracheae is arranged along the axial inwall of rotary kiln, and quantity is at least three, arranges on several gas orifices or tracheae at least one nozzle is installed on every tracheae, and at least one gas orifice is set on each nozzle; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different;
(2) described tracheae is arranged along the axial outer wall of rotary kiln, and quantity is at least three, and at least one nozzle is installed on every tracheae, has a gas orifice on each nozzle at least; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different.
Described tracheae is along the axial division of rotary kiln Liang Ge working group at least, and the tracheae of each working group configures independently air supply controller, and air supply controller is connected with high-temperature gas and/or gas at normal temperature.
Described rotary kiln is divided into two workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the discharge end of rotary kiln, this workspace is depth decarburization preliminary roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, controls the thermal value of rotary kiln discharge port material lower than per kilogram 30 kilocalories.
Or, described rotary kiln is divided into three workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the intermediate ends of rotary kiln, this workspace is depth decarburization roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, and the time of depth decarburization and roasting is 90-240 minute; The 3rd workspace is positioned at the discharge end of rotary kiln, and this workspace is cooling area, in material, supplies normal temperature air, and the temperature of charge of discharging is dropped to below 730 degree Celsius.
Described temperature reaches and maintains the method for 800-900 degree Celsius: control independently air supply controller of each working group, to the high-temperature gas and/or the gas at normal temperature that spray into appropriate or excessive differing temps, different oxygen level in material.
Described high-temperature gas is high temperature air, or high-temperature oxygen-enriched, or high-temperature flue gas, or mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Air or the oxygen enrichment of described high temperature air or the high-temperature oxygen-enriched waste-heat for operation device before utilizing and rotary kiln.
Embodiment 1:
Former process device is directly discharged, temperature directly sends into and in rotary kiln, carries out decarburization again and calcination process higher than the decarburization material of the high temperature Rock coal containing alums of 700 degree Celsius.In decarburization and calcination process process again, from discharge end, sending into temperature is appropriate high-temperature flue gas more than 800 degree Celsius, is blown into from the side proper amount of normal-temperature air, by controlling air feeder, only have when rotary kiln forwards material covering gas orifice to, this gas orifice being covered by material is just blown.Its tracheae decoration form is: described tracheae is along the axial inwall layout of rotary kiln, and quantity is ten, and on every tracheae, at a distance of a nozzle of 15 centimetres of installations, each nozzle length is 30 centimetres, and seven gas orifices are set; Described nozzle enters in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Aperture from from feed end to discharge end gas orifice reduces gradually.Described rotary kiln is divided into two workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, by the gas orifice setting in advance, under set supply gas pressure, in this position material, spray into appropriate air, make in material the carbon residue heating that burns away, the high-temperature flue gas that cooperation enters from discharge end, reaches the temperature of material and maintains 800-900 degree Celsius; Second workspace is positioned at the discharge end of rotary kiln, this workspace is depth decarburization preliminary roast area, by the gas orifice setting in advance, under set supply gas pressure, in this position material, spray into appropriate air, the temperature that the high-temperature flue gas that cooperation enters from discharge end is controlled material maintains 800-900 degree Celsius, carbon residue in material is burnt away, control the thermal value of rotary kiln discharge port material lower than per kilogram 30 kilocalories.
Embodiment 2:
On the basis of embodiment 1, rotary kiln is every 100 centimetres of Wei Yige working groups vertically, and the tracheae of each working group is arranged similar to Example 1, and it is independent mutually that each organizes tracheae, and having independently air supply controller and warming probe, air supply controller is connected with high-temperature gas and/or gas at normal temperature.In decarburization and calcination process process again, according to the gap of the temperature of charge in this working group and technic index, from the side of rotary kiln, in rotary kiln, be blown into appropriate or excessive normal temperature air or normal temperature oxygen enrichment, or be alternately blown into two kinds of gases; The temperature of charge of Shi Gai working group reaches technic index scope.
Embodiment 3--4:
On the basis of embodiment 1,2, the gas temperature being blown into is from the side 150 degree Celsius.
Embodiment 5--8:
On the basis of embodiment 1--4, the high-temperature flue gas of not sending into from discharge end.
Embodiment 9---12:
Basic identical with embodiment 1-4, different is that high-temperature flue gas is to enter and subregion from feed end, that is: described rotary kiln is divided into three workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the intermediate ends of rotary kiln, this workspace is depth decarburization roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, and the time that maintains depth decarburization and roasting is 90-240 minute; The 3rd workspace is positioned at the discharge end of rotary kiln, and this workspace is cooling area, in material, supplies normal temperature air, and the temperature of charge of discharging is dropped to below 730 degree Celsius.
Claims (6)
1. the method to the capable decarburization again of Rock coal containing alum decarburization material and roasting with rotary kiln, described method is that the decarburization material of Rock coal containing alum is sent into and in rotary kiln, carried out decarburization again and calcination process; Described decarburization material is that former process device is directly discharged, temperature is higher than the decarburization material of the high temperature Rock coal containing alums of 700 degree Celsius; In the process of described decarburization again and calcination process, in the decarburization material of the high temperature Rock coal containing alum in rotary kiln, be blown into high-temperature gas and/or gas at normal temperature more than 650 degree Celsius;
The mode that described high-temperature gas and/or gas at normal temperature are blown in rotary kiln is:
(1) from the side of rotary kiln, be blown into;
(2) from the opening for feed of rotary kiln, be blown into;
(3) from rotary kiln discharge port, be blown into;
Above three kinds of modes can be used singly or in combination;
It is characterized in that: tracheae decoration form when described high-temperature gas and/or gas at normal temperature are blown into from the side of rotary kiln is:
(1) described tracheae is arranged along the axial inwall of rotary kiln, and quantity is at least three, arranges on several gas orifices or tracheae at least one nozzle is installed on every tracheae, and at least one gas orifice is set on each nozzle; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different;
(2) described tracheae is arranged along the axial outer wall of rotary kiln, and quantity is at least three, and at least one nozzle is installed on every tracheae, has a gas orifice on each nozzle at least; Described nozzle can enter in the decarburization material of rotary kiln; Described tracheae is connected with high-temperature gas and/or gas at normal temperature; Described tracheae is according to the difference of position, and on it, the aperture of gas orifice and layout are thereupon different.
2. method according to claim 1, is characterized in that: described tracheae is along the axial division of rotary kiln Liang Ge working group at least, and the tracheae of each working group configures independently air supply controller, and air supply controller is connected with high-temperature gas and/or gas at normal temperature.
3. method according to claim 1 and 2, it is characterized in that: described rotary kiln is divided into two workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the discharge end of rotary kiln, this workspace is depth decarburization preliminary roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, controls the thermal value of rotary kiln discharge port material lower than per kilogram 30 kilocalories.
4. method according to claim 1 and 2, it is characterized in that: described rotary kiln is divided into three workspace vertically, first job district is positioned at the feed end of rotary kiln, this workspace is depth decarburization temperature adjustment district, and the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature reaches and maintains 800-900 degree Celsius; Second workspace is positioned at the intermediate ends of rotary kiln, this workspace is depth decarburization roast area, the temperature of controlling material by air demand, temperature and the oxygen level of high-temperature gas and/or gas at normal temperature maintains 800-900 degree Celsius, and the time of depth decarburization and roasting is 90-240 minute; The 3rd workspace is positioned at the discharge end of rotary kiln, and this workspace is cooling area, in material, supplies normal temperature air, and the temperature of charge of discharging is dropped to below 730 degree Celsius.
5. method according to claim 3, it is characterized in that: described temperature reaches and maintain the method for 800-900 degree Celsius: control independently air supply controller of each working group, to the high-temperature gas and/or the gas at normal temperature that spray into appropriate or excessive differing temps, different oxygen level in material.
6. method according to claim 4, it is characterized in that: described temperature reaches and maintain the method for 800-900 degree Celsius: control independently air supply controller of each working group, to the high-temperature gas and/or the gas at normal temperature that spray into appropriate or excessive differing temps, different oxygen level in material.
7. method according to claim 1 and 2, is characterized in that: described high-temperature gas is high temperature air, high-temperature oxygen-enriched gas, high-temperature flue gas or its mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Described high temperature air or high-temperature oxygen-enriched gas are air or the oxygen rich gas of the waste-heat of operation device before utilizing and rotary kiln.
8. method according to claim 3, is characterized in that: described high-temperature gas is high temperature air, high-temperature oxygen-enriched gas, high-temperature flue gas or its mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Described high temperature air or high-temperature oxygen-enriched gas are air or the oxygen rich gas of the waste-heat of operation device before utilizing and rotary kiln.
9. method according to claim 4, is characterized in that: described high-temperature gas is high temperature air, high-temperature oxygen-enriched gas, high-temperature flue gas or its mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Described high temperature air or high-temperature oxygen-enriched gas are air or the oxygen rich gas of the waste-heat of operation device before utilizing and rotary kiln.
10. method according to claim 5, is characterized in that: described high-temperature gas is high temperature air, high-temperature oxygen-enriched gas, high-temperature flue gas or its mixed gas; Described high-temperature flue gas is the high-temperature flue gas that front operation device produces; Described high temperature air or high-temperature oxygen-enriched gas are air or the oxygen rich gas of the waste-heat of operation device before utilizing and rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210122657.6A CN102627325B (en) | 2012-04-25 | 2012-04-25 | Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210122657.6A CN102627325B (en) | 2012-04-25 | 2012-04-25 | Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln |
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| CN102627325A CN102627325A (en) | 2012-08-08 |
| CN102627325B true CN102627325B (en) | 2014-04-09 |
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| CN201210122657.6A Expired - Fee Related CN102627325B (en) | 2012-04-25 | 2012-04-25 | Method for re-decarburizing and roasting vanadium-containing stone coal decarburized materials by using rotary kiln |
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| CN107200352A (en) * | 2017-05-26 | 2017-09-26 | 成都铬科高化工技术有限责任公司 | A kind of oxygen-enriched air roasting method by preparing sodium vanadate containing vanadium raw materials |
| CN112880394B (en) * | 2021-01-27 | 2022-08-30 | 山东义科节能科技股份有限公司 | Kiln system and method for firing ceramsite containing heat value raw material and by-producing waste heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477416A (en) * | 1982-09-27 | 1984-10-16 | Union Carbide Corporation | Salt roasting of vanadium ore in the presence of carbon |
| GB2194941B (en) * | 1986-09-10 | 1990-04-04 | Uralsky Inst Chernykh Metall | Process for recovering vanadium values |
| CN1059885A (en) * | 1990-07-24 | 1992-04-01 | 湖南省煤炭科学研究所 | A kind of novel method of from contain the scherbinaite coal, extracting Vanadium Pentoxide in FLAKES |
| CN100519780C (en) * | 2007-02-08 | 2009-07-29 | 中南大学 | Method for extracting vanadium pentoxide from stone coal |
| CN101215647B (en) * | 2008-01-16 | 2010-06-09 | 中南大学 | Roasting technique for extracting vanadium from stone coal vanadium ore |
| CN102399976B (en) * | 2011-11-30 | 2013-08-28 | 长沙矿冶研究院有限责任公司 | Roasting pretreatment process for extracting vanadium pentoxide from high-carbon scherbinaite-containing coal mine and vanadium pentoxide extracting method |
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