CN1052334A - The hot air smelting method of lead blast furnace and wind jacket in furnace thereof - Google Patents
The hot air smelting method of lead blast furnace and wind jacket in furnace thereof Download PDFInfo
- Publication number
- CN1052334A CN1052334A CN 89107360 CN89107360A CN1052334A CN 1052334 A CN1052334 A CN 1052334A CN 89107360 CN89107360 CN 89107360 CN 89107360 A CN89107360 A CN 89107360A CN 1052334 A CN1052334 A CN 1052334A
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- Prior art keywords
- furnace
- wind
- smelting
- blast
- lead
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- Pending
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- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 5
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007499 fusion processing Methods 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 abstract description 2
- 230000002708 enhancing Effects 0.000 abstract 1
- 239000011449 brick Substances 0.000 description 12
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Abstract
The present invention is to provide a kind of hot air smelting method and wind jacket in furnace thereof of lead blast furnace.Its principal feature is: the wind nested structure is set in existing lead blast furnace, utilize the waste heat of fusion process, allow the cold wind that blasts usually in the lead-smelting furnace flow through this wind cover and to become hot blast, again hot blast is blown in the stove, reduce burnt consumption, the effect of enhancing productivity thereby play.Simultaneously, this technology is compared with ad hoc hot blast heat-exchange equipment, not only less investment, instant effect, and save the energy, factory building and dedicated operations, maintenance personnel again.
Description
The present invention relates to a kind ofly refine the processing method of lead blast furnace hot air smelting and make the hot blast wind cover that is located in this way in the lead blast furnace.
Lead blast furnace has been used for many years, and its primary structure is made up of cupola well, body of heater, furnace roof and air feed system, blasts normal temperature air usually and carries out the interior fusion process of stove.But, because the plumbous shaft of refining is to build by laying bricks or stones with refractory brick, operation under long-time hot conditions, be subjected to furnace charge etch, wash away, make body of heater usually local badly damaged, thereby work-ing life of having reduced body of heater.
In order to strengthen furnace body structure, improve converter life, the measure that present lead blast furnace is taked mainly is following three kinds of forms: half water-jacket typ of 1, laying bricks: the first half of shaft is built refractory brick by laying bricks or stones, and adopts jacket structure for water in the Lower Half that the temperature height is easy to damage; 2, full water-jacket typ: whole shaft all is to be constituted by upper and lower water jacket, or a plurality of unitized constructions that are connected as a single entity up and down; 3, vaporize water shell type: remain water jacket structure, but increase ultimate compression strength on the structure,, produce the water vapor mode and discharge with the control volume of water input.Strengthen cooling provision for above-mentioned three kinds,, improve the converter life aspect and produced certain positively effect though keeping jacket structure for water,, it has but brought unfavorable factor to smelting technology.At first be that the hot water or the water vapor of discharging consumes the interior net heat of stove, increase energy consumption, improved and smelted with burnt.Simultaneously, the smelting temperature of lead blast furnace improves, and melting operation is also influenced.In addition, blast the normal temperature air in the stove, efflux through smelting the flue gas that becomes with 200 ℃ of left and right sides temperature after the operation, clearly this gas has been taken away the heat in the stove.Therefore, just make Jiao's consumption of present lead blast furnace be difficult to descend always.
The hot air smelting of lead blast furnace is a kind of advanced smelting technology, its advantage is under 200～300 ℃ of conditions of wind-warm syndrome, saves coke about 30% than adopting normal temperature air to smelt, and improves melting throughput 30%, the working of a furnace is easy to safeguard in the smelting process, is beneficial to normally carrying out of production.
In order to obtain the hot air smelting of lead blast furnace, at present at this base of the neat nurse Kent of the Soviet Union, the Saganoseki of the Ai Erpasuo of the U.S. and Japan etc. is smelted producer, adopts the hot blast heat exchange of special uses such as tubular heat exchanger or hotblast stove to equip in succession and obtains hot blast.But, although the hot air smelting of lead blast furnace is obtained than quantum jump its smelting technology, but existing again, the consequent sets up huge heat exchanging apparatus, investment that will be bigger, occupied ground, fundamental construction, waiting to enter ordinary production also needs secondary ground to consume the work such as maintenance, production management of the equipment in fuel, water power and the additional many regular jobs thereof.Therefore, make much progress, fail so far to popularize though the lead blast furnace hot air smelting is technical.
Purpose of the present invention is exactly to utilize the wind nested structure that is provided with in the lead blast furnace, the waste heat that self discharges in the smelting process is converted to hot blast by the wind cover, again this hot blast is applied in self strengthening smelting technology, smelts burnt consumption, improve the purpose of smelting throughput thereby reach to reduce.Overcome simultaneously investment height that ad hoc hot-blast heat exchange device brought again, taken up an area of big, secondary energy consumption and numerous and diverse technological operation, shortcoming such as management.
The object of the present invention is achieved like this: in the lead blast furnace of being made up of cupola well, body of heater, bonnet and air-blast system, with below the body of heater feeding platform with work section more than the cupola well, roughly can divide five zones from top to bottom: promptly temperature is the preheating zone for 100～400 ℃, 400～700 ℃ is last reduction zone, 700～900 ℃ are following reduction zone, 900～1200 ℃ is the melting area, and 1200～1400 ℃ is the focal area.Technical scheme of the present invention is provided with the ventilation air channel exactly between preheating zone and following reduction zone.It promptly is the normal temperature air that directly to blast by gas blower in the stove.Change into earlier and introducing from the airduct that is located at stove top, the ventilation air channel in being located at stove under cross-ventilated conduction pattern, forces to cool off to keep the structure of body of heater to wind path wall.Meanwhile, the normal temperature air preheating zone in the stove of flowing through, behind the air channel in last reduction zone, time three intervals, reduction zone and be heated as hot blast, wind-warm syndrome can reach 120～250 ℃.By pipeline, by-pass valve control hot blast is blown in the stove with wind as smelting again, thereby reaches the purpose of hot air smelting.Foregoing air channel is a kind of by steel or castiron ventilation wind cover.Existing brick layed or water jacket structure are still continued to use in melting area and focal area at body of heater.
Be described in detail concrete structure of the present invention and processing method below by drawings and Examples.
Fig. 1 is the longitudinal sectional view according to a kind of spiral wind shell type lead blast furnace of the lead blast furnace apoplexy cover of the present invention's proposition.
Fig. 2 is the longitudinal sectional view of air-jacketed lead blast furnace arranged side by side.
As shown in Figure 1: the wind conveying pipe road of this blast furnace under the wind cover reaches, other structures are still close with existing lead blast furnace.This cupola well 3 mainly is made of furnace foundation 1 and cupola well refractory brick 2.The interval on cupola well 3 tops is focal areas, and position, focal area normal temps is between 1200～1400 ℃ in smelting process, and the body of heater at this position mainly is made up of water jacket 8.Water jacket 8 is to cool off by water inlet pipe 7 and rising pipe 9 to safeguard furnace binding.The cinder notch outside at stove is provided with slag dam 4, and cinder notch top is fire-resistant brick mountain type and little water tank 5, and the top of water jacket 8 is that ring blocks up 6, and the top of ring stifled 6 is melting areas, and this regional temperature is usually between 900～1200 ℃.Its shaft 12 is built its outer periphery operation post 10, railing 11 by laying bricks or stones by refractory brick.Shaft 12 also can be replaced by water jacket, is three intervals that the technical program is provided with the wind cover between shaft 12 and feeding platform 22, i.e. preheating zone, last reduction zone, following reduction zone.The thermograde in these three intervals is generally at 200～900 ℃, and their body of heater is two-layerly to be made of inside and outside, and skin is the shaft 13 of being built by laying bricks or stones by normal block stove mode by refractory brick, and nexine is exactly the spiral wind cover that this Fig. 1 proposes.This wind cover is the metal sleeve that adopts the welded steel plate of inside and outside two different diameters, diaphragm is set between two sleeve wall constitutes helical channel.Its principle of work is such: earlier the normal temperature air of air-blast system is introduced air intake cover 14 by the top of shaft, normal temperature air is successively through the operation that rotates of wind cover 15,16,17 spirals, to be heated as hot blast introducing air loop duct 19 by going out one's intention as revealed in what one says cover 18, and then communicate with each branch wind pipe by air loop duct, hot blast is blasted in the stove from furnace bottom tuyere zone air port 20.Air loop duct and each branch wind pipe all are coated with lagging material.For adjusting, on air loop duct 19, also be provided with control valve 21 into the stove air quantity.The top of feeding platform 22 is fire door 24 and furnace roof 25, and the periphery is a railing 23, and furnace roof 25 tops are bonnet 26, and other positions are identical with general furnace structure.
This spiral wind cover also can adopt cross section be orthogonal square tube or cylinder along its spiral-line around forming, also can adopt cast steel or cast iron manufacturing simultaneously.
Shown in Figure 2 is a kind of wind cover of block form structure, and its furnace binding and wind cover are provided with interval identical with Fig. 1, and the structure that wind overlaps and arrange different.Its working process is such: the normal temperature air advanced person who comes by air-blast system go up endless tube 1(tube section be square, circle all can), is rectangle through connecting airduct 2 importings by the equally distributed wind cover 3(vertically arranged side by side of polylith cross section), same normal temperature air is heated with the conduction pattern of convection current at wind cover inner side-wall, make hot blast be aggregated into air loop duct 5 through guide duct 4 then, through control valve 6 and the airduct 7 that passes water jacket 8 hot blast is blasted in the stove again from wind cover 3.For effective adjusting, the control hot blast, air loop duct 5 is provided with control valve.
This piecemeal wind cover arranged side by side also can be made all-in-one-piece, exactly the wind cover is made the double wall sleeve of an integral body, with vertical diaphragm the sleeve double wall evenly is separated into several longitudinal air flow passages between sidewall in sleeve and the sidewall then, by aforesaid mode normal temperature air is introduced at last, hot blast is drawn again.Same this wind cover also can be realized by the mode arranged side by side of steel pipe.Should be noted that: all coated lagging material of hot-blast pipe line appearance of drawing through the wind cover, in case heat scatters and disappears.In addition, spiral wind cover among this wind cover and Fig. 1 also can be arranged at arbitrary or two intervals in above-mentioned three intervals, because this wind cover is manufactured with boiler sheet, manufacture the wind cover if adopt more heat-stable material against corrosion (as lining chromium slag), can also be set to 1200 ℃ melting area down between its setting area, and this wind cover can adopt again cast steel or cast iron to make.
The hot air smelting of air-jacketed lead blast furnace has successively produced three stoves two manufacturer's trial throws since development, wherein one is the 0.38m that adopts block form wind nested structure
2Lead blast furnace, two 0.64m that adopt spiral wind nested structure in addition
2And 1.03m
2Lead blast furnace.Its hot blast technological process of production is as follows:
Gas blower → normal temperature air → ventilator trunk → plumbous stove wind cover → hot blast → air loop duct → variable valve → pipeline → go into stove as the hot blast of melting.
Operating condition is as follows:
Production practice prove: go into the airborne oxygen of stove and be heated and increased activity, rare gas element nitrogen is brought sensible heat into, and the tuyere zone coke is burnt rapidly, and the focal area temperature raises and concentrates, and has improved the thermo-efficiency and the fuel availability of blast furnace.Therefore, strengthen production, improved throughput, reduced coke ratio, made the working of a furnace regular easily, especially contained the higher furnace charge of zinc and embodied its superiority significantly in processing, and more to embody its superiority be at body of heater wind cover part-structure, and the not long furnace accretion at this position prolongs stove and makes.
Present technique can be applied to again in non-ferrous metal and other smelting furnace technology fully. It is compared with present lead blast furnace, and energy consumption is low, the production efficiency height. And compare with ad hoc hot blast heat transmission equipment lead-smelting furnace, simple for structure, need not increase equipment, factory building, factory site, water power and heating fuel, save again a large amount of management of equipment technologys, operating personnel and construction investment.
Claims (5)
1, a kind of hot air smelting method of lead blast furnace and wind jacket in furnace thereof, the method feature of its hot air smelting is: the normal temperature air of gas blower is introduced the ventilation air channel that is located in the stove from airduct, by pipeline hot blast is blown in the stove with wind as smelting again.
2, the hot air smelting method of a kind of lead blast furnace according to claim 1 and wind jacket in furnace thereof, it makes in this way and special-purpose ventilation air channel is characterised in that: be a kind of be located in the stove, by steel or castiron wind cover.
3, the hot air smelting method of lead blast furnace according to claim 1 and 2 and wind jacket in furnace thereof is characterized in that: this wind cover is arranged at the preheating zone of lead blast furnace, last reduction zone and following reduction zone, or is arranged on arbitrary, two intervals in these three intervals.
4, the hot air smelting method of lead blast furnace according to claim 1 and wind jacket in furnace thereof, it is characterized in that: its hot blast technological process of production is gas blower → normal temperature air → ventilator trunk → plumbous stove wind cover → hot blast → air loop duct → variable valve → pipeline → go into stove as the hot blast of smelting.
5, according to the hot air smelting method and the wind jacket in furnace thereof of claim 2 or 3 described lead blast furnaces, it is characterized in that: the wind nested structure that is located at shaft inside is spiral wind cover or block form wind cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107360 CN1052334A (en) | 1989-12-08 | 1989-12-08 | The hot air smelting method of lead blast furnace and wind jacket in furnace thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107360 CN1052334A (en) | 1989-12-08 | 1989-12-08 | The hot air smelting method of lead blast furnace and wind jacket in furnace thereof |
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| CN1052334A true CN1052334A (en) | 1991-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 89107360 Pending CN1052334A (en) | 1989-12-08 | 1989-12-08 | The hot air smelting method of lead blast furnace and wind jacket in furnace thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979942A (en) * | 2010-10-23 | 2011-02-23 | 郴州市国大有色金属冶炼有限公司 | One-step lead smelting blast furnace |
| CN104329935A (en) * | 2014-10-28 | 2015-02-04 | 永兴县荣鹏金属有限公司 | Improved novel blast furnace |
| CN104792168A (en) * | 2015-04-21 | 2015-07-22 | 永兴县东宸有色金属再生利用有限公司 | Environment-friendly blasting smelting furnace |
| CN109609774A (en) * | 2018-12-29 | 2019-04-12 | 耒阳市焱鑫有色金属有限公司 | A kind of high antimony secondary smoke dearsenification temperature control blast furnace having multilayer air port and high coke column |
-
1989
- 1989-12-08 CN CN 89107360 patent/CN1052334A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979942A (en) * | 2010-10-23 | 2011-02-23 | 郴州市国大有色金属冶炼有限公司 | One-step lead smelting blast furnace |
| CN104329935A (en) * | 2014-10-28 | 2015-02-04 | 永兴县荣鹏金属有限公司 | Improved novel blast furnace |
| CN104329935B (en) * | 2014-10-28 | 2015-11-11 | 永兴县荣鹏金属有限公司 | A kind of modified blast furnace |
| CN104792168A (en) * | 2015-04-21 | 2015-07-22 | 永兴县东宸有色金属再生利用有限公司 | Environment-friendly blasting smelting furnace |
| CN104792168B (en) * | 2015-04-21 | 2017-03-22 | 永兴县东宸有色金属再生利用有限公司 | Environment-friendly blasting smelting furnace |
| CN109609774A (en) * | 2018-12-29 | 2019-04-12 | 耒阳市焱鑫有色金属有限公司 | A kind of high antimony secondary smoke dearsenification temperature control blast furnace having multilayer air port and high coke column |
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