CN104593597A - Device for injecting pulverized-coal-based reducer - Google Patents
Device for injecting pulverized-coal-based reducer Download PDFInfo
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- CN104593597A CN104593597A CN201510081552.4A CN201510081552A CN104593597A CN 104593597 A CN104593597 A CN 104593597A CN 201510081552 A CN201510081552 A CN 201510081552A CN 104593597 A CN104593597 A CN 104593597A
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- valve
- reductive agent
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- manual valve
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Abstract
The invention relates to a device for injecting a pulverized-coal-based reducer. The device is characterized by comprising a reducer inlet (1), a reducer bin outlet control valve (2), a flow-state air pipe (3), a flow-state air pipe (4), an injection air pipe (5), an injection air pipe (6), a total air source pipe (7), a pressure-regulating valve (8), a pressure-regulating valve (9), a manual valve (10), a manual valve (11), a manual valve (12), a manual valve (13), a manual valve (14), a manual valve (15), a manual valve (18), a manual valve (19), a pressure meter (16) and a pressure meter (17). The device finishes conveying of the high-flow reducer under relatively low pressure and can increase the utilization rate of the reducer and reduce using failures.
Description
Technical field
The invention belongs to field of smelting, particularly relate to a kind of new device improving reclaimed copper pyrorefining restore job efficiency, reduce the energy and reductive agent consumption.
Background technology
The refining of fixed anode furnace composition brass is smelting technology very ripe in the world today, and the fixed anode furnace of Guixi Smelter mainly adopts thick composition brass raw material production anode copper.The composition brass refinery processes of fixed anode furnace can be divided into:
1, the charge melted phase--the raw material prepared and flux charging machine are added in stove from fixed anode furnace two charging openings in batches, then carries out fusing by two oil-fired burners and smelt.
2, the oxidative slagging phase--the impurity pressurized air in copper is sprayed into molten bath oxidation through oxidation air, carries out slag making with agent reaction.In the copper liquid that oxidative slagging terminates, oxygen level is about 7000 ppm.
3, reduction period--after deslagging terminates, after utilizing malleation conveying principle just fine coal base reductant being delivered to reduction airduct with fluidization form by blowing device, then be blown into melt and carry out reduction deoxidation.When the oxygen level of copper liquid is less than 2000ppm, namely complete restore job.
4, cast the phase--the copper water that refining is good imports table roller liquid filling machine through copper outlet, chute, is cast into positive plate.
Blister copper is after peroxidation deslagging, and most of impurity is oxidized to be removed, but has saturated Cu2O in copper water, as containing hyperoxia in copper, can make that copper becomes fragile, ductility and electroconductibility reduces.Therefore reduction deoxidation must be carried out with reductive agent.The primary chemical equation of reduction reaction: 2Cu
2o+C=4Cu+CO
2affect the factor of reduction efficiency except reductive agent carbon content, also have the flow of reductive agent, the pressure of delivery vehicles and flow, the residence time of reductive agent in copper water and contact surface area, touch opportunity, blowing device failure rate with melt.
Fixed anode furnace restore job adopts single-pipe directly spraying injection of reducing agent blowing apparatus to be blown in copper melts by reductive agent, but this device only has an outlet, in order to shorten the restore job time as far as possible, with the energy consumption of Copper making of enhancing productivity, reduce, reductive agent operational throughput is just necessarily required to reach 1.3-1.6t/h.This malleation conveying reductive agent method, realize the unimpeded of reductive agent conveying, the blast of conveying need reach 0.5MPa, comparatively concentrated when causing reductive agent to be not only injected in stove, and can be taken out of in a large number by the conveying wind overflowed fast, make it little with copper melts contact area, touch opportunity is few, the reaction times is short.The reductive agent of a large amount of spilling, except a part is producing except reducing atmosphere in stove, a remaining part can enter flue gas dust collection system, easily causes flue gas system generation deflagration accident having.
The opposing party, single-pipe directly spraying injection of reducing agent blowing apparatus in use, accompany as run in reductive agent comparatively bigger material time, blowing device force of compression rises until reach the blast of conveying, cause this blowing device easily to occur card, stifled fault, not only clear up difficulty greatly, also have a strong impact on operating rate.
Summary of the invention
The object of the invention is just to provide and a kind ofly lower pressure can be adopted to complete the conveying of large discharge reductive agent and can improve reductive agent utilization ratio, reduce the novel powdered coal base reductant blowing device of operational failure.
Injection of reducing agent blowing apparatus of the present invention adopts dual circuit conveying, inside establishes spray tube, whirlwind type premixing mechanism etc.Reductive agent is fully fluidization before ejecting, by spraying sufficient kinetic energy of getting back, and before appearance blocking, can automatically reduce reductive agent operational throughput, ensureing normal operation.Realize the new device that reduction efficiency improves, reductive agent usage quantity reduces, plugging fault is eliminated.
The handling machinery that injection of reducing agent blowing apparatus of the present invention is combined by two tunnels is formed, and therefore, this device not only structure is light, little, and internal space is large, makes reductive agent fluidising effect better.Each road handling machinery introduces two respectively from total source of the gas has Valve controlling and separate tracheae.Wherein a overpressure is the wind of 0.2-0.25MPa, produces rotary wind, break up the reductive agent entered from top make its fluidization and make the foreign material length be mixed into identical with throughput direction in fluidised form room by 8 pod apertures be circumferentially distributed on aerofoil.B overpressure is the wind of 0.3-0.35MPa, spray at a high speed along outlet pipe axis in jet chamber through aerofoil center, producing parital vacuum guides the body that is transferred of fluidised form room to enter jet chamber's action of going forward side by side and can transmit, and makes to be transferred the increase of body kinetic energy, can be blown in copper melts smoothly.When exporting or the transport pipe of its front end occurs that conveying is smooth, the pressure reduction of jet chamber and fluidised form room can be caused to reduce and the wind returned that is obstructed will cause the blast of fluidised form room to increase, thus the flow being transferred body is declined automatically.Meanwhile, the conveying wind that pressure increases can impact blocking place, and the blocking that will occur is eliminated.
Injection of reducing agent blowing apparatus of the present invention is divided into two tunnels to carry the reductive agent supplied by reductive jar, through two reduction airducts stretched in stove from two charging door respectively, it is blown into melt.Each road handling machinery only need carry the reductive agent flow of 0.8-1t/h, and this makes the blast carried have 0.3MPa can meet use needs.Transfer line becomes two from one, and this makes reductive agent and copper melts contact area be multiplied is that reaction surface increases; The blast of conveying is reduced to 60%, and this makes to carry wind to reduce with the kinetic energy being transferred the mixture that body is combined into, thus the speed reduction of overflowing from copper melts and reaction times increase; The mixture mixed, the chance that reductive agent is contacted with copper melts adds.Therefore, adopt this device can improve restore job efficiency, reduce reductive agent consumption and eliminate plugging fault.
Accompanying drawing explanation
Fig. 1 is the connection diagram of apparatus of the present invention.
Wherein 1-reductive agent entrance, 2-reductive agent storehouse discharge control valve, 3,4-fluidised form airduct, 5,6-sprays airduct, the total gas source pipe of 7-, 8,9-relief valve, 10,11,12,13,14,15,18,19-manual valve, 16,17-tensimeter.
Fig. 2 is the structure sectional view of apparatus of the present invention.
Wherein 1-reductive agent entrance, 4-fluidised form airduct, 6-sprays airduct, 23-aerofoil, 24-fluidised form room, and 26-jets room, 27-pressure gauge connection, 28-injection tube.
Embodiment
The present invention is further described according to following embodiment, and those skilled in the art can understand, following embodiment only plays the effect of explanation to the present invention.Without departing from the premise in the spirit of the present invention, any improvement the present invention done and substituting all within the scope of protection of the invention.
A kind of fine coal base reductant blowing device adopts the Dual-conveying tall device combined, the interface 1 of its upper end DN100 is connected with reductive agent storehouse outlet valve 2, a pipe 3 and 4, b pipe 5 and 6 connect with the relief valve 8,9 after total gas source pipe 7 respectively and install manual valve 10,11,12,13 respectively, connect reductive agent transfer lime after outlet pipe manual valve 14,15, detect mouth respectively setting pressure table 16,17 and valve 18,19.
During use, first open valve 18,19; Connect the outlet pipe manual valve 14,15 of reductive agent transfer lime; Manual valve 10,11,12,13; Total gas source pipe 7 relief valve 8,9 below, then manual setting relief valve 8,9 is respectively to 0.2MPa, 0.3MPa, at this moment needs to check whether the pressure of tensimeter 16,17 display is less than 0.15MPa(and can continues downward operation as being less than; Otherwise need pipeline be checked and fix a breakdown), then open reductive agent storehouse outlet valve 2 as required.During stopping, then contrary (relief valve is without the need to operation).
Fine coal base reductant enters this device fluidised form room 24 from the outlet of reductive agent tank through upper end entrance; The fluidised form wind introduced by total source of the gas 7 and injection wind enter this device from rear portion.After pressure regulation, pressure is that the fluidised form wind of 0.2-0.25MPa produces rotary winds by circumferentially uniform on aerofoil 8 pod apertures, makes the foreign material length be mixed into identical with throughput direction the fine coal base reductant fluidization being entered fluidised form room by top.
It is 0.3-0.35MPa that injection airduct passes aerofoil center spraying its pressure at a high speed from aerofoil 450mm place along outlet pipe axis, jet chamber's entrance produce parital vacuum guide fluidised form room be transferred body enter jet chamber go forward side by side action can transmit, make to be transferred body kinetic energy to increase, can be blown in copper melts smoothly.Original single-pipe directly spraying injection of reducing agent blowing apparatus and device of the present invention, by fault statistics, reductive agent unit consumption and restore job time, compare by following table 1-3.
Table 1 fine coal base reductant blowing device plugging fault cartogram
Table 2 reductive agent unit consumption cartogram
| 2012 (Single-pipe directly spraying ) | 2013 (Single-pipe directly spraying ) | 2014 (apparatus of the present invention) | |
| Reductive agent ton copper consumption | 22.5 kg/t.cu | 19.9 kg/t.cu | 15.9 kg/t.cu |
Table 3 restore job time cartogram
| 2012 (Single-pipe directly spraying ) | 2013 (Single-pipe directly spraying ) | 2014 (apparatus of the present invention) | |
| Every stove restore job time | 1.65 hour | 1.67 hour | 1.08 hour |
Through measuring and calculating direct injection injection of reducing agent blowing apparatus and novel reducer blowing device, the ratio of the residence time of reductive agent in copper melts is made to be 3:4; Be 3:4 with the ratio of copper melts contact area, above two is 80% to fine coal base reductant unit consumption Index Influence degree, both can realize the good result that fine coal base reductant usage quantity saves 40%.
Claims (4)
1. a fine coal base reductant blowing device, it is characterized in that comprising reductive agent entrance (1), reductive agent storehouse discharge control valve (2), fluidised form airduct (3) and (4), spray airduct (5) and (6), the total gas source pipe of 7-(7), relief valve (8) and (9), manual valve (10), (11), (12), (13), (14), (15), and (19) (18), tensimeter (16) and (17), interface 1 is connected with reductive agent storehouse discharge control valve (2), fluidised form airduct (3) and 4, spray airduct (5) and (6) connect with the relief valve (8) after total gas source pipe (7) and (9) respectively and manual valve (10) is installed respectively, (11), (12), (13), outlet pipe manual valve (14), (15) reductive agent transfer lime is connect after, detect mouth setting pressure table (16) respectively, and valve (18) (17), (19).
2. device according to claim 1, is characterized in that fluidised form airduct (3) and (4), separate with injection airduct (5) and (6), and parallel.
3. device according to claim 2, is characterized in that the pressure in fluidised form airduct (3) and (4) pipe is 0.2-0.25MPa, and the pressure sprayed in airduct (5) and (6) is 0.3-0.35MPa.
4., according to the arbitrary described device of claim 1-3, it is characterized in that: first open valve (18), (19); The outlet pipe manual valve (14) of reductive agent transfer lime, (15) are connect; Manual valve (10), (11), (12), (13); Total gas source pipe (7) relief valve below (8), (9), manual setting relief valve (8), (9) are respectively to 0.2MPa, 0.3MPa again, whether the pressure that inspection tensimeter (16), (17) show is less than 0.15MPa, then opens reductive agent storehouse outlet valve (2) as required.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081552.4A CN104593597B (en) | 2015-02-16 | 2015-02-16 | A kind of fine coal base reductant blowing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081552.4A CN104593597B (en) | 2015-02-16 | 2015-02-16 | A kind of fine coal base reductant blowing device |
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| CN104593597A true CN104593597A (en) | 2015-05-06 |
| CN104593597B CN104593597B (en) | 2017-11-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540008A (en) * | 2003-11-01 | 2004-10-27 | 云南铜业股份有限公司 | Method for using solid reductant in rotary type anode furnace |
| CN201817501U (en) * | 2010-08-05 | 2011-05-04 | 中冶南方工程技术有限公司 | Coal injection and blowing system for blast furnace |
| CN202989183U (en) * | 2012-12-17 | 2013-06-12 | 武汉钢铁(集团)公司 | Blast furnace pulverized coal injection device |
| JP2014101567A (en) * | 2012-11-22 | 2014-06-05 | Jfe Steel Corp | Particulate matter removal method and particulate matter collection instrument |
| CN204079999U (en) * | 2014-11-16 | 2015-01-07 | 山东盛阳铁合金有限公司 | A kind of novel blast-furnace Coalblowing system |
-
2015
- 2015-02-16 CN CN201510081552.4A patent/CN104593597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540008A (en) * | 2003-11-01 | 2004-10-27 | 云南铜业股份有限公司 | Method for using solid reductant in rotary type anode furnace |
| CN201817501U (en) * | 2010-08-05 | 2011-05-04 | 中冶南方工程技术有限公司 | Coal injection and blowing system for blast furnace |
| JP2014101567A (en) * | 2012-11-22 | 2014-06-05 | Jfe Steel Corp | Particulate matter removal method and particulate matter collection instrument |
| CN202989183U (en) * | 2012-12-17 | 2013-06-12 | 武汉钢铁(集团)公司 | Blast furnace pulverized coal injection device |
| CN204079999U (en) * | 2014-11-16 | 2015-01-07 | 山东盛阳铁合金有限公司 | A kind of novel blast-furnace Coalblowing system |
Non-Patent Citations (1)
| Title |
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| 王前等: ""新型固体还原剂在铜回转式阳极炉还原过程中的应用"", 《云南冶金》 * |
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