CN2608925Y - Energy-saving type negative pressure fritting furnace - Google Patents
Energy-saving type negative pressure fritting furnace Download PDFInfo
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- CN2608925Y CN2608925Y CN 03229790 CN03229790U CN2608925Y CN 2608925 Y CN2608925 Y CN 2608925Y CN 03229790 CN03229790 CN 03229790 CN 03229790 U CN03229790 U CN 03229790U CN 2608925 Y CN2608925 Y CN 2608925Y
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- negative pressure
- utility
- hearth
- shaft
- furnace
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Abstract
The utility model designs an energy-saving negative pressure fritting furnace which comprises a furnace stack (2) and a hearth (12), wherein the bottom end of the furnace stack (2) is provided with a material outlet (15). The utility model is characterized in that the materials output (15) is provided with a heat recycle device (14); the hearth (12) is communicated with the heat recycle device (14) through a blast tube (11). Because temperature can reach 500 to 600 DEG after the pellet is sintered and is discharged from a discharge opening, and the oxygen needed by combustion improves the air feeding temperature by more than 300 DEG through the heat recycle device, the utility model efficiently recycles residual heat, increases the combustion efficiency greatly, reduces the operation cost and improves the working environment. Under the action of the negative pressure, an air inlet arranged on the furnace stack above the hearth can supply air automatically, the fuel gas combusts three times, and the insufficient supply of oxygen of the upper part of a fritting cavity is solved. Because of the more sufficient combustion, the content of CO and dust in exhaust air is decreased greatly, therefore, the environmental pollution is decreased.
Description
Technical field
The utility model relates to the sintering furnace of the iron oxide sphere of powder that a kind of metallurgy industry uses, particularly a kind of sintering furnace of fire coal.
Background technology
As everyone knows,, need that at first iron powder is added water iron powder is made the iron oxide sphere of powder, carry out sintering, can in iron-smelting furnace, smelt iron then with iron powder ironmaking.So-called sintering is meant brown iron oxide is added the pelletizing that water is made, and is positioned in the sintering furnace high-temperature roasting.What be widely used at present is the shaft furnace sintering, and the operation under positive pressure operation exists shortcomings such as burning is insufficient, energy consumption is high, sintering quality is poor, pollution is big.In order to overcome above-mentioned defective, the inventor has designed a kind of negative pressure sintering furnace in Chinese patent 98225489.X, but yet exists defectives such as burning is insufficient, the energy utilization incomplete, operating environment difference.
Summary of the invention
The utility model technical issues that need to address are a kind of energy-saving negative pressure sintering furnaces of design, to overcome the above-mentioned defective that prior art exists.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: basic structure of the present utility model is same as the prior art, the shaft and the burner hearth that comprise the inner chamber filling iron oxide sphere of powder, the shaft lumen centers has a central cylinder, the central cylinder lower end connects with air exhauster by tube connector and is connected, burner hearth is distributed in around the periphery, middle part of shaft, the central cylinder top is than the low one section effective depth in shaft top, being enough to make gas after the burning to flow into central tube dignity extracts out, the shaft bottom is provided with material outlet, so that the therefrom discharging of the iron ball of thermal sintering.It is characterized in that the material outlet place is provided with heat reclaim unit, burner hearth is connected with said heat reclaim unit by ajutage, is provided with air inlet in addition on the shaft above the burner hearth.
In use, at burner hearth internal combustion cleaned coal, combustion gas enters the shaft inner chamber from burner hearth, under the air draught effect of air exhauster, the gas backstreaming after the burning enters central cylinder, and is extracted out by air exhauster by tube connector, then the shaft inner chamber is in the negative pressure operation, load the iron oxide sphere of powder in the annular housing between shaft inwall and central cylinder outer wall, the iron oxide sphere of powder is under the heating of combustion gas and sintering finished, then in the discharging of restoration of lower stack exit.The needed oxygen that burns then enters burner hearth by air-supply arrangement.
By above-mentioned disclosed technical scheme as seen, the utlity model has significant advantage: can reach 500-600 ℃ because pellet sintering is finished from discharging opening discharge back temperature, the needed oxygen that burns passes through heat reclaim unit, improve ventilation temperature more than 300 ℃, enter burner hearth then, reclaimed waste heat effectively, improved efficiency of combustion greatly, reduce operating cost, improved operating environment.And be arranged on above the burner hearth air inlet on the shaft under the effect of negative pressure, and air feed automatically, three burnings are carried out in combustion gas, solved the oxygen supply deficiency on top, sintering chamber, because burning is more abundant, greatly reduces the content of CO in the waste gas, dust, and then has reduced environmental pollution.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the stereogram of Fig. 1.
Referring to Fig. 1 and Fig. 2, the utility model comprises the shaft 2 and the burner hearth 12 of the inner chamber filling iron oxide sphere of powder, the lumen centers of shaft 2 has a central cylinder 3, central cylinder 3 lower ends connect with air exhauster by tube connector 6 and are connected, burner hearth 12 is distributed in around the periphery, middle part of shaft 2, central cylinder 3 tops are than the low one section effective depth in shaft 2 tops, and shaft 2 bottoms are provided with material outlet 15.It is characterized in that material outlet 15 places are provided with heat reclaim unit 14, burner hearth 12 is connected with heat reclaim unit 14 by ajutage 11, and the shaft 2 of burner hearth 12 tops is provided with air inlet 10.
As seen from Figure 2, said heat reclaim unit 14 is a trumpet-shaped air intake vent.
Said ajutage 11 can adopt pipe or flat tube.
Claims (6)
1. energy-saving negative pressure sintering furnace, comprise shaft (2) and burner hearth (12), shaft (2) bottom is provided with material outlet (15), it is characterized in that, material outlet (15) locates to be provided with heat reclaim unit (14), and burner hearth (12) is connected with heat reclaim unit (14) by ajutage (11).
2. negative pressure sintering furnace according to claim 1 is characterized in that, the shaft (2) of burner hearth (12) top is provided with air inlet (10).
3. negative pressure sintering furnace according to claim 1 is characterized in that, said heat reclaim unit (14) is a trumpet-shaped air intake vent.
4. negative pressure sintering furnace according to claim 3 is characterized in that, the shaft (2) of burner hearth (12) top is provided with air inlet (10).
5. according to each described negative pressure sintering furnace of claim 1～4, it is characterized in that said ajutage (11) adopts pipe.
6. according to each described negative pressure sintering furnace of claim 1～4, it is characterized in that said ajutage (11) adopts flat tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229790 CN2608925Y (en) | 2003-03-26 | 2003-03-26 | Energy-saving type negative pressure fritting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03229790 CN2608925Y (en) | 2003-03-26 | 2003-03-26 | Energy-saving type negative pressure fritting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2608925Y true CN2608925Y (en) | 2004-03-31 |
Family
ID=34165049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03229790 Expired - Fee Related CN2608925Y (en) | 2003-03-26 | 2003-03-26 | Energy-saving type negative pressure fritting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2608925Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062528A (en) * | 2010-11-24 | 2011-05-18 | 北京建邦伟业机械制造有限公司 | Fly ash product sintering furnace and method and formula thereof |
-
2003
- 2003-03-26 CN CN 03229790 patent/CN2608925Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062528A (en) * | 2010-11-24 | 2011-05-18 | 北京建邦伟业机械制造有限公司 | Fly ash product sintering furnace and method and formula thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |