CN103374637A - Apparatus and method for direct removal of zinc oxide in powder solid material of blast furnace - Google Patents
Apparatus and method for direct removal of zinc oxide in powder solid material of blast furnace Download PDFInfo
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- CN103374637A CN103374637A CN2013103112767A CN201310311276A CN103374637A CN 103374637 A CN103374637 A CN 103374637A CN 2013103112767 A CN2013103112767 A CN 2013103112767A CN 201310311276 A CN201310311276 A CN 201310311276A CN 103374637 A CN103374637 A CN 103374637A
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Abstract
The invention relates to an apparatus for direct removal of zinc oxide in a powder solid material of a blast furnace. The apparatus comprises a nitrogen and carbon dioxide supply apparatus, a flowmeter, an air inlet pipe, a temperature thermocouple, a high temperature heating furnace, a reaction tube, an electric heating control system, a zinc recoverer and an exhaust pipe. The nitrogen supply apparatus and the carbon dioxide supply apparatus are respectively connected to the flowmeter and connected with one end of the air inlet pipe; the other end of the air inlet pipe is connected to the reaction tube; the high temperature heating furnace is sleeved on the reaction tube; the temperature thermocouple is inserted into the reaction tube; the reaction tube communicates with the outside through the exhaust pipe with one end inserted into the reaction tube; and the zinc recoverer is arranged on the exhaust pipe. The apparatus and method provided by the invention can reduce environmental pollution, avoid waste of the powder solid material of the blast furnace, and avoid blast furnace erosion when the blast furnace powder solid material is used directly as a raw material for sintering and pelletizing.
Description
Technical field
The present invention relates to the technical field that the powdery solid material removes zinc oxide, be specifically related to the method that a kind of blast furnace powdery solid material directly removes zinc oxide.
Background technology
Blast furnace powdery solid material is the dust of the crude fuel taken out of with blast furnace gas (also claiming gas) in iron manufacturing process of iron-smelting blast furnace and the particulate that the high-temperature zone intense reaction produces, comprise lower boiling non-ferrous metal steam etc., that a kind of light weight, grain are little, contain the multiple harmful poisonous materials such as As, Pb, Bi, Zn, current blast furnace powdery solid material major part is effluxed by iron and steel enterprise, and small part is allocated in sintering and the pellet as iron-bearing material.If the blast furnace powdery solid material that is rich in zinc element is directly as sintering and pellet feed, and sintering, pelletizing process can not dezincifies, and agglomerate can come back to blast furnace as the main raw material of blast furnace with zinc.When the enrichment aggravation of zinc, the interior lining erosion of blast furnace is serious, and the bonding phenomenon is also more outstanding.Knot is thick when the most serious can be to the shaft middle and upper part, and air quantity does not add, and hanging is frequent, and yield effect is large.Because iron ore resource is day by day exhausted, consumed resource increases severely, and how efficiently to utilize blast furnace powdery solid material and improves its comprehensive added value, and environmental contamination reduction becomes the key subjects that metallurgical industry faces.
Summary of the invention
In order to solve above technical problem, the invention provides the apparatus and method that a kind of blast furnace powdery solid material directly removes zinc oxide, can reduce pollution to environment, corrode blast furnace when avoiding the waste of blast furnace powdery solid material can also avoid blast furnace powdery solid material directly as sintering and pellet feed.
The present invention is achieved through the following technical solutions:
A kind of blast furnace powdery solid material directly removes the device of zinc oxide, comprises nitrogen supply (NS) device, carbonic acid gas feeding mechanism, under meter, inlet pipe, temperature thermocouple, high-temperature heater, reaction tubes, electric-heating control system, zinc withdrawer and vapor pipe; Described nitrogen supply (NS) device be connected the carbonic acid gas feeding mechanism and connect respectively described under meter and link to each other with described inlet pipe one end, the described inlet pipe the other end passes into described reaction tubes; Described high-temperature heater is sleeved on the described reaction tubes, and described temperature thermocouple inserts described reaction tubes, and described reaction tubes is communicated with outside exhaust by the vapor pipe that an end inserts wherein with the outside; Described zinc withdrawer is arranged on the vapor pipe.
In technique scheme, described high-temperature heater is disposed with Heating element, thermal insulation layer, steel sleeve from inside to outside.
In technique scheme, described Heating element is the Si-Mo rod heating element.
In technique scheme, described reaction tubes comprises sealing cover, and sealing cover covers on reaction tubes top.
In technique scheme, described reaction tubes is arranged on reactor base.
In technique scheme, described zinc withdrawer is condensing works.
A kind of blast furnace powdery solid material directly removes the method for zinc oxide, comprises the steps:
With the blast furnace powdery solid reaction tubes of packing into, the reaction tubes bottom adds corundum ball and screen cloth, to prevent that powder from entering in the inlet pipe, the bottom passes into nitrogen by the nitrogen supply (NS) device, controlling flow by under meter is 0.5～2L/min, because nitrogen is rare gas element, can not react with the blast furnace powder, so be used for control experiment atmosphere; By the high-temperature heater heat temperature raising, by temperature in the electric-heating control system conditioned reaction pipe, measure temperature in the reaction tubes by temperature thermocouple, heat-up rate is 10 ℃/min;
When temperature rises to 900～1050 ℃ in reaction tubes, carbonic acid gas begin with solid powder in carbon begin reaction, generate carbon monoxide, stop to pass into nitrogen, passing into carbonic acid gas by the carbonic acid gas feeding mechanism again, is 0.5～1.5L/min by under meter control flow;
Temperature rises to 1050～1300 ℃ in the reaction tubes, relatively is beneficial to the reaction of carbon monoxide and zinc oxide under this temperature; Have a power failure, pass into nitrogen by the nitrogen supply (NS) device to reaction tubes and make its cooling, take out reaction tubes, sealing naturally cools to normal temperature, can obtain removing the powdery solid material that contains zinc oxide.
Take off the zinc withdrawer that is arranged on the vapor pipe and can collect zinc in the expellant gas.
The carbonic acid gas that the present invention utilizes carbon in the dust and carbonic acid gas feeding mechanism to provide generates carbon monoxide by the high-temperature heater reacting by heating in reaction tubes, carbon monoxide at high temperature reduction-oxidation zinc forms zinc fume and carbonic acid gas, zinc fume is collected recycling after by the condensation of zinc withdrawer, and carbonic acid gas is discharged by vapor pipe; Therefore reduce zinc and corroded blast furnace to the pollution of environment, when having avoided the waste of zinc in the blast furnace powdery solid material can also avoid blast furnace powdery solid material directly as sintering and pellet feed.
Description of drawings
The blast furnace powdery solid material that Fig. 1 provides for the embodiment of the invention directly removes the setting drawing of zinc oxide.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Referring to Fig. 1, a kind of blast furnace powdery solid material that the embodiment of the invention provides directly removes the device of zinc oxide, comprise nitrogen supply (NS) device 1, carbonic acid gas feeding mechanism 2, under meter 3, inlet pipe 9, valve I 13, valve II 14, valve III 15, temperature thermocouple 4, sealing cover 9, high-temperature heater 6, reaction tubes 7, reactor base 8, electric-heating control system 10, zinc withdrawer 11, vapor pipe 12, nitrogen supply (NS) device 1 links to each other with carbonic acid gas feeding mechanism 2 difference connection traffic meters 3 and with inlet pipe 9 one ends, valve I 13 and valve II 14 are arranged on controls respectively being communicated with of nitrogen supply (NS) device 1 and carbonic acid gas feeding mechanism 2 and inlet pipe 9 on the inlet pipe 6, inlet pipe 9 the other ends pass into reaction tubes 7, valve III 15 is arranged on the inlet pipe 9, control inlet pipe 9 is communicated with reaction tubes 7, sealing cover 9 covers on reaction tubes 7 tops, reaction tubes 7 is arranged on the reactor base 8, reactor base 8 plays a supportive role, reaction tubes 7 is paved, be beneficial to entering of reaction tubes 7 bottom inflow pipes 9, temperature thermocouple 4 passes sealing cover 9 insertion reaction pipes 7, reaction tubes 7 is communicated with outside exhaust by the vapor pipe 12 that an end inserts wherein with outside, and zinc withdrawer 11 is arranged on the vapor pipe 12.
High-temperature heater 6 bodies are followed successively by Heating element, thermal insulation layer, steel sleeve from inside to outside, and heating unit is the Si-Mo rod heating element, and lagging material is set around the Si-Mo rod heating element, reduce heat radiation.Temperature is the highest in the reaction tubes is heated to 1500 ℃.
Under meter 3 can be adjusted the flow of nitrogen and carbonic acid gas according to actual needs.
The concrete steps of method that blast furnace powdery solid material directly removes zinc oxide are as follows:
Then dry blast furnace powdery solid material 25 grams of packing into insert temperature thermocouple sleeve, reinstall the dry blast furnace powdery solid material of 25 grams, and temperature thermocouple sleeve is passed centre hole on the reactor sealing cover, cover sealing cover 5.
With (temperature thermocouple High-Alumina diplopore insulation tube and High-Alumina thermocouple protection protection of pipe) in the temperature thermocouple 4 insertion reaction device thermocouple sheaths.
Check reactor inlet pipe 9, vapor pipe 12, guarantee tight.
Plugged passes into nitrogen temperature by nitrogen supply (NS) device 1, is 1L/min by under meter 3 control flows, because nitrogen is rare gas element, can not react with the blast furnace powder, so be used for the control reaction atmosphere; Electric-heating control system 10 is regulated high-temperature heater 6 Heating temperatures, and heat-up rate is 10 ℃/min.When reaction tubes 7 interior temperature rise to 900 ℃, stop to pass into nitrogen, pass into carbonic acid gas by carbonic acid gas feeding mechanism 2, be 1L/min by under meter 3 control flows, temperature to 1050 ℃, then having a power failure passes into nitrogen and is cooled to 600 ℃, take out the powdery solid material in the reaction tubes 7, sealing naturally cools to normal temperature, then carries out composition detection, calculates zinc oxide decreasing ratio (the results are shown in Table 1).
Take off the zinc withdrawer 11 that is arranged on the vapor pipe 12 and can collect zinc in the expellant gas.
Then dry blast furnace powdery solid material 25 grams of packing into insert temperature thermocouple sleeve, reinstall the dry blast furnace powdery solid material of 25 grams, and temperature thermocouple sleeve is passed centre hole on the reactor sealing cover, cover sealing cover 5.
With (temperature thermocouple High-Alumina diplopore insulation tube and High-Alumina thermocouple protection protection of pipe) in the temperature thermocouple 4 insertion reaction device thermocouple sheaths.
Check reactor inlet pipe 9, vapor pipe 12, guarantee tight.
Plugged passes into nitrogen temperature by nitrogen supply (NS) device 1, is 1L/min by under meter 3 control flows, because nitrogen is rare gas element, can not react with the blast furnace powder, so be used for the control reaction atmosphere; Electric-heating control system 10 is regulated high-temperature heater 6 Heating temperatures, and heat-up rate is 10 ℃/min.When reaction tubes 7 interior temperature rise to 950 ℃, stop to pass into nitrogen, pass into carbonic acid gas by carbonic acid gas feeding mechanism 2, be 1L/min by under meter 3 control flows, temperature to 1100 ℃, then having a power failure passes into nitrogen and is cooled to 600 ℃, take out the powdery solid material in the reaction tubes, sealing naturally cools to normal temperature, then carries out composition detection, calculates zinc oxide decreasing ratio (the results are shown in Table 1).
Embodiment 3
Then dry blast furnace powdery solid material 25 grams of packing into insert temperature thermocouple sleeve, reinstall the dry blast furnace powdery solid material of 25 grams, and temperature thermocouple sleeve is passed centre hole on the reactor sealing cover, cover sealing cover 5.
With (temperature thermocouple High-Alumina diplopore insulation tube and High-Alumina thermocouple protection protection of pipe) in the temperature thermocouple 4 insertion reaction device thermocouple sheaths.
Check reactor inlet pipe 9, vapor pipe 12, guarantee tight.
Plugged passes into nitrogen temperature by nitrogen supply (NS) device 1, is 1L/min by under meter 3 control flows, because nitrogen is rare gas element, can not react with the blast furnace powder, so be used for the control reaction atmosphere; Electric-heating control system 10 is regulated high-temperature heater 6 Heating temperatures, and heat-up rate is 10 ℃/min.When reaction tubes 7 interior temperature rise to 1000 ℃, stop to pass into nitrogen, pass into carbonic acid gas by carbonic acid gas feeding mechanism 2, be 1L/min by under meter 3 control flows, temperature to 1200 ℃, then having a power failure passes into nitrogen and is cooled to 600 ℃, take out the powdery solid material in the reaction tubes, sealing naturally cools to normal temperature, then carries out composition detection, calculates zinc oxide decreasing ratio (the results are shown in Table 1).
1) reaction tubes 7 bottoms keep flat sieve plate, put the corundum ball, put woven wire again, guarantee that the material in reactor when blast furnace powdery solid material is packed into is in the flat-temperature zone of high-temperature heater, the flat-temperature zone is to keep 1500 ± 5 ℃ of temperature and length greater than the zone of 200mm in the stove in the present embodiment.
Then dry blast furnace powdery solid material 25 grams of packing into insert temperature thermocouple sleeve, reinstall the dry blast furnace powdery solid material of 25 grams, and temperature thermocouple sleeve is passed centre hole on the reactor sealing cover, cover sealing cover 5.
With (temperature thermocouple High-Alumina diplopore insulation tube and High-Alumina thermocouple protection protection of pipe) in the temperature thermocouple 4 insertion reaction device thermocouple sheaths.
Check reactor inlet pipe 9, vapor pipe 12, guarantee tight.
Plugged passes into nitrogen temperature by nitrogen supply (NS) device 1, is 1L/min by under meter 3 control flows, because nitrogen is rare gas element, can not react with the blast furnace powder, so be used for the control reaction atmosphere; Electric-heating control system 10 is regulated high-temperature heater 6 Heating temperatures, and heat-up rate is 10 ℃/min.When reaction tubes 7 interior temperature rise to 1050 ℃, stop to pass into nitrogen, pass into carbonic acid gas by carbonic acid gas feeding mechanism 2, be 1L/min by under meter 3 control flows, temperature to 1280 ℃, then having a power failure passes into nitrogen and is cooled to 600 ℃, take out the powdery solid material in the reaction tubes, sealing naturally cools to normal temperature, then carries out composition detection, calculates zinc oxide decreasing ratio (the results are shown in Table 1).
The situation that removes of zinc oxide before and after the reaction of table 1 powdery solid material
| ? | ZnO accounts for powdery solid material ratio (%) | ZnO decreasing ratio (%) |
| Powdery solid material before the reaction | 4.82 | - |
| |
2.68 | 62.19 |
| |
2.36 | 66.71 |
| Embodiment 3 | 1.89 | 73.34 |
| |
1.91 | 73.05 |
By as seen from Table 1, by setting different reaction end temperature, the decreasing ratio of this device and technique powdery solid material zinc oxide is respectively 62.19%, 66.71%, 73.34% and 73.05%, most of zinc oxide in the blast furnace powdery solid material is removed, part zinc reclaims by the zinc withdrawer, avoid knowing clearly zinc to the waste of zinc in the pollution of environment and the blast furnace powdery solid material, corrode blast furnace in the time of can also avoiding blast furnace powdery solid material directly as sintering and pellet feed.
It should be noted last that, above embodiment is only in order to technology implementation scheme that this material is described but not restriction, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. a blast furnace powdery solid material directly removes the device of zinc oxide, it is characterized in that: comprise nitrogen supply (NS) device (1), carbonic acid gas feeding mechanism (2), under meter (3), inlet pipe (9), temperature thermocouple (4), high-temperature heater (6), reaction tubes (7), electric-heating control system (10), zinc withdrawer (11) and vapor pipe (12); Described nitrogen supply (NS) device (1) be connected carbonic acid gas feeding mechanism (2) and connect respectively described under meter (3) and link to each other with described inlet pipe (9) one ends, described inlet pipe (9) the other end passes into described reaction tubes (7); Described high-temperature heater (6) is sleeved on the described reaction tubes (7), and described temperature thermocouple (4) inserts described reaction tubes (7), and described reaction tubes (7) is communicated with outside exhaust by the vapor pipe (12) that an end inserts wherein with the outside; Described zinc withdrawer (11) is arranged on the described vapor pipe (12).
2. blast furnace powdery solid material as claimed in claim 1 directly removes the device of zinc oxide, it is characterized in that: described high-temperature heater (6) is disposed with Heating element, thermal insulation layer, steel sleeve from inside to outside.
3. blast furnace powdery solid material as claimed in claim 2 directly removes the device of zinc oxide, it is characterized in that: described Heating element is the Si-Mo rod heating element.
4. blast furnace powdery solid material as claimed in claim 1 directly removes the device of zinc oxide, it is characterized in that: described reaction tubes comprises sealing cover (5), and sealing cover (5) covers on reaction tubes (7) top.
5. blast furnace powdery solid material as claimed in claim 1 directly removes the device of zinc oxide, it is characterized in that: described reaction tubes (7) is arranged on reactor base (8).
6. blast furnace powdery solid material as claimed in claim 1 directly removes the device of zinc oxide, it is characterized in that: described zinc withdrawer (11) is condensing works.
7. a blast furnace powdery solid material directly removes the method for zinc oxide, it is characterized in that: comprise the steps:
With the blast furnace powdery solid reaction tubes (7) of packing into, reaction tubes (7) bottom adds corundum ball and screen cloth, to prevent that powder from entering in the inlet pipe (9), the bottom passes into nitrogen by nitrogen supply (NS) device (1), controlling flow by under meter (3) is 0.5～2L/min, by high-temperature heater (6) heat temperature raising, by the interior temperature of electric-heating control system (10) conditioned reaction pipe (7), measure temperature in the reaction tubes by temperature thermocouple (4), heat-up rate is 10 ℃/min;
When temperature rises to 900～1050 ℃ in reaction tubes (7), stopping to pass into nitrogen, pass into carbonic acid gas by carbonic acid gas feeding mechanism (2) again, is 0.5～1.5L/min by under meter (3) control flow;
After temperature of charge rises to 1050～1300 ℃, have a power failure, pass into the nitrogen cooling by nitrogen supply (NS) device (1), take out reaction tubes (7), sealing naturally cools to normal temperature, can obtain removing the powdery solid material powder that contains zinc oxide;
Take off the zinc withdrawer (11) that is arranged on the vapor pipe (12) and can collect zinc in the expellant gas.
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| CN103374637B CN103374637B (en) | 2015-02-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990830A (en) * | 2015-06-19 | 2015-10-21 | 武汉钢铁(集团)公司 | Method and device for measuring effect on billet surface oxidation from furnace inside atmosphere of heating furnace |
| CN107974556A (en) * | 2017-11-30 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of dezincification device for blast furnace dedusting ash |
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| JP2002241850A (en) * | 2001-02-20 | 2002-08-28 | Sumitomo Heavy Ind Ltd | Method for removing zinc in zinc-containing iron oxide using rotary kiln |
| CN101386913A (en) * | 2008-09-24 | 2009-03-18 | 吴道洪 | Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace |
-
2013
- 2013-07-23 CN CN201310311276.7A patent/CN103374637B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673431A (en) * | 1986-01-08 | 1987-06-16 | Bricmont & Associates, Inc. | Furnace dust recovery process |
| CN1219208A (en) * | 1996-05-28 | 1999-06-09 | L及C斯泰因米勒(非洲)(私人)有限公司 | Fluidized bed treatment of EAF dust |
| JP2002241850A (en) * | 2001-02-20 | 2002-08-28 | Sumitomo Heavy Ind Ltd | Method for removing zinc in zinc-containing iron oxide using rotary kiln |
| CN101386913A (en) * | 2008-09-24 | 2009-03-18 | 吴道洪 | Method for recovering zinc oxide in Zn-containing dust treatment by rotary hearth furnace |
Non-Patent Citations (1)
| Title |
|---|
| 彭开玉 等: "冶金含锌尘泥资源化的现状与展望", 《中国资源综合利用》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990830A (en) * | 2015-06-19 | 2015-10-21 | 武汉钢铁(集团)公司 | Method and device for measuring effect on billet surface oxidation from furnace inside atmosphere of heating furnace |
| CN107974556A (en) * | 2017-11-30 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of dezincification device for blast furnace dedusting ash |
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| CN103374637B (en) | 2015-02-25 |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |