CN105177291B - A kind of method for preventing flat-head type top blast stove furnace roof slagging - Google Patents
A kind of method for preventing flat-head type top blast stove furnace roof slagging Download PDFInfo
- Publication number
- CN105177291B CN105177291B CN201510516485.4A CN201510516485A CN105177291B CN 105177291 B CN105177291 B CN 105177291B CN 201510516485 A CN201510516485 A CN 201510516485A CN 105177291 B CN105177291 B CN 105177291B
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- CN
- China
- Prior art keywords
- flue
- slagging
- furnace roof
- top blast
- gas temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 241000755266 Kathetostoma giganteum Species 0.000 title claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 239000003245 coal Substances 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 239000002283 diesel fuel Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
The invention belongs to top blast smelting technique apparatus field, and in particular to a kind of method for preventing flat-head type top blast stove furnace roof slagging, follow the steps below:(1) flue-gas temperature is measured in flat-head type top blast stove operation process;(2) according to flue-gas temperature, different responses are made.The method of the present invention effectively suppresses furnace roof and uptake flue slagging fast-growth.
Description
Technical field
The invention belongs to top blast smelting technique apparatus field, and in particular to a kind of to prevent flat-head type top blast stove furnace roof slagging
Method.
Background technology
At present, top blast smelting technique is as oxygen-enriched Strong oxdiative molten pool melting technology, for copper, lead, zinc, tin-polymetallic smelting
Refining.Top blast furnace technology improves air by the spray gun of particular design and fuel sprays into molten bath, enters stove material and is put into from top filling mouthful
In stove, the molten bath acutely seethed is formed in stove.Because working of a furnace deterioration causes splash or enters stove material water in top blast smelting process
When negative pressure variation is larger in point overweight and stove, the splash of furnace high-temperature melt is in furnace roof formation slagging.The furnace roof knot
The fast-growth of slag, is easily easily caused charging aperture in the formation slagging of charging aperture inner surface and blocks, it is impossible to find then occur foam in time
Slag accident；If bulk slagging is fallen into stove suddenly may damage the even a large amount of high-temperature fusants of stove brick from crest of weir ejection, to operative employee
Bring very big potential safety hazard.When furnace roof slagging fast-growth, can only blowing out by manual cleaning, and the position of slagging is on top
Blown converter inner surface, difficulty is brought to cleaning work, adds labor intensity.
The content of the invention
To solve the problem of above technology is present, present invention offer is a kind of to prevent the side of flat-head type top blast stove furnace roof slagging
Method.Its technical scheme is：
A kind of method for preventing flat-head type top blast stove furnace roof slagging, it is characterised in that, follow the steps below:
(1) flue-gas temperature is measured in flat-head type top blast stove operation process;
(2) according to flue-gas temperature, different responses are made,
If A, flue-gas temperature are more than 750 DEG C, coefficient of second air 70~80% is adjusted;
If B, flue-gas temperature are less than 750 DEG C and more than 700 DEG C, the supplying of adjustment fine coal and concentrate, fine coal weight is concentrate
The 5~10% of weight, pulverized coal particle size is 3~5mm, and it is 1500~3000mm below furnace roof, control that adjustment, which fills into the position of Secondary Air,
Coefficient of second air is 50~80%;
If C, flue-gas temperature are less than 700 DEG C, burner is stretched into cold-zone burning, the fuel that burner is used is oxygen-enriched and diesel oil
Fuel combination, produce 1500 DEG C of high temperature.
By long-term observation, experiment and research, inventor is had found, improving flat-head type top blast stove top temperature can be reduced
Flat-head type top blast stove furnace roof slagging.With reference to the design feature of flat-head type top blast stove, three kinds of raising flat-head type top blast stove furnace roofs are proposed
The method of cold-zone temperature, the premise that each method is used is variant.The present invention is for this premise of flue-gas temperature, it is proposed that above-mentioned three
The method of kind.According to actual condition, it can also be arranged in pairs or groups such as CO concentration in flue gas and furnace roof slagging situation other preventing slagging
Method, it is of course also possible to the position that suitably adjustment pulverized coal particle size, coefficient of second air and burner are stretched into.According to actual condition, on
3 kinds of methods are stated to realize simultaneously using also can be used alone and effectively suppress slagging growth or elimination slagging, it is ensured that top blast stove is normal
Stable operation.
Beneficial effect
（1）Effectively suppress furnace roof and uptake flue slagging fast-growth；
（2）The labor intensity of cleaning furnace roof slagging is greatly reduced, top blast stove is improved and normally works continuously rate；
（3）Avoid furnace roof bulk slagging from falling into stove and damage the stove brick possibility that even high-temperature fusant is gushed out from crest of weir, simultaneously
The supplying of fine coal and Secondary Air position adjustment reduce burner hearth and the thermograde in molten bath is poor, are beneficial to extend the stove longevity.
Embodiment
Embodiment 1
As top blast stove 60~80t/h of inlet amount, fine coal 2~3t of consumption, second-time burning wind coefficient 50%, flue-gas temperature are incorporated
650~700 DEG C.Now, burner, regulation diesel oil flow to 40kg/h or so can be used directly, while adjusting oxygen-enriched flow ensures
Diesel oil burns completely.The burner lighted is stretched into furnace roof through furnace roof charging aperture or sample tap or insulation burner mouthful, produced
1500 DEG C of high temperature, you can realize and directly improve top temperature to more than 750 DEG C, melts slagging and prevents slagging.
Embodiment 2. work as top blast stove 80~110t/h of inlet amount, be incorporated fine coal 2~3t of consumption, second-time burning wind coefficient 50%,
700~750 DEG C of flue-gas temperature.On the premise of negative pressure is certain in stove, this temperature easily forms bulk slagging in top blast stove furnace roof,
Supplying fine coal consumption can now be increased to more than 4t, it is desirable to which pulverized coal particle size is 3~5mm, while adjusting second-time burning wind coefficient extremely
50%, the position that fills into of the second-time burning wind is fixed on 1500~3000mm below furnace roof, uniformly matches somebody with somebody second-time burning wind, now
The fine coal of supplying, which is fallen into before molten bath, just to react with second-time burning wind in burner hearth and discharges substantial amounts of heat, and this partial heat passes through high temperature
Flue gas passes to furnace roof, can reach more than 750 DEG C by appealing operation top temperature, furnace roof is difficult slagging in this temperature.
The top blast stove 80~120t/h of inlet amount of embodiment 3., is incorporated fine coal 3~4t of consumption, the certain premise of negative pressure in stove
Under, more than 750 DEG C of flue-gas temperature, now, the increase of remnants S simple substance, CO content ＞ 300ppm in flue gas.Adjust coefficient of second air 70
~80%, flue-gas temperature is improved using the combustible exothermic heat of reaction in second-time burning wind and flue gas, top temperature can reach 750
Even more high more than DEG C is a little, can effectively suppress the growth of furnace roof slagging at this temperature, keeps normal production operation, no
Any adjustment must be made.
Claims (1)
1. a kind of method for preventing flat-head type top blast stove furnace roof slagging, it is characterised in that, follow the steps below:
(1) flue-gas temperature is measured in flat-head type top blast stove operation process;
(2) according to flue-gas temperature, different responses are made,
If A, flue-gas temperature are more than 750 DEG C, coefficient of second air 70~80% is adjusted;
If B, flue-gas temperature are less than 750 DEG C and more than 700 DEG C, the supplying of adjustment fine coal and concentrate, fine coal weight is concentrate weight
5~10%, pulverized coal particle size is 3~5mm, and it is 1500~3000mm below furnace roof that adjustment, which fills into the position of Secondary Air, is controlled secondary
Wind coefficient is 50~80%;
If C, flue-gas temperature are less than 700 DEG C, burner is stretched into cold-zone burning, the fuel that burner is used is the mixed of oxygen-enriched and diesel oil
Fuel is closed, 1500 DEG C of high temperature is produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516485.4A CN105177291B (en) | 2015-08-21 | 2015-08-21 | A kind of method for preventing flat-head type top blast stove furnace roof slagging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516485.4A CN105177291B (en) | 2015-08-21 | 2015-08-21 | A kind of method for preventing flat-head type top blast stove furnace roof slagging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105177291A CN105177291A (en) | 2015-12-23 |
| CN105177291B true CN105177291B (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510516485.4A Expired - Fee Related CN105177291B (en) | 2015-08-21 | 2015-08-21 | A kind of method for preventing flat-head type top blast stove furnace roof slagging |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204455253U (en) * | 2015-01-23 | 2015-07-08 | 云南锡业股份有限公司 | A kind of device improving top blow smelting stove furnace roof cold-zone temperature |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2334870B1 (en) * | 2007-10-04 | 2011-01-03 | Consejo Superior De Investigaciones Cientificas | MODIFIED INDUCTION OVEN FOR THE ELIMINATION OF SIDERURGICAL WASTE WITH CINC WITH RECOVERY OF ITS METALS. |
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2015
- 2015-08-21 CN CN201510516485.4A patent/CN105177291B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204455253U (en) * | 2015-01-23 | 2015-07-08 | 云南锡业股份有限公司 | A kind of device improving top blow smelting stove furnace roof cold-zone temperature |
Non-Patent Citations (3)
| Title |
|---|
| "偏转二次风对炉内结渣的影响";陈刚等;《动力工程》;20040229;第24卷(第1期);第5-8页 * |
| "富邦富氧侧吹炼铜炉二次风改造生产实践";王志超等;《有色矿冶》;20140831;第30卷(第4期);第40-42页 * |
| "艾萨熔池熔炼的应用与优化";付江等;《工业加热》;20071231;第36卷(第1期);第39页右栏第1段 * |
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| Publication number | Publication date |
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| CN105177291A (en) | 2015-12-23 |
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Granted publication date: 20170829 |