CN203037048U - Direct-reduction controlled-atmosphere rotary hearth furnace - Google Patents
Direct-reduction controlled-atmosphere rotary hearth furnace Download PDFInfo
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- CN203037048U CN203037048U CN 201220707550 CN201220707550U CN203037048U CN 203037048 U CN203037048 U CN 203037048U CN 201220707550 CN201220707550 CN 201220707550 CN 201220707550 U CN201220707550 U CN 201220707550U CN 203037048 U CN203037048 U CN 203037048U
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- furnace
- wall
- rotary hearth
- direct
- burner
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Abstract
The utility model discloses a direct-reduction controlled-atmosphere rotary hearth furnace which solves the problem in the prior art that heating temperature of materials is uneven, the furnace atmosphere is not easy to adjust, and the materials leak from a discharging position and the like. The direct-reduction controlled-atmosphere rotary hearth furnace is characterized in that a plum blossom wall (4) for bearing a material plate (5) for containing the materials (6) is evenly arranged on an upper surface of a rotatable furnace bottom (3), a flame separating plate (7) is arranged on the middle portion of a hearth, a regenerative burner (8) is arranged on the upper portion of an outer ring furnace wall (1), a sub-high-velocity burner (9) is arranged on the lower portion of an inner ring furnace wall (2), and a coal gas inlet hole (10) and an air inlet hole (11) are formed in the upper portion of the inner ring furnace wall. The direct-reduction controlled-atmosphere rotary hearth furnace can flexibly adjust various specific reducing atmospheres in the furnace and is reasonable in structure, high in degree of automation, high in production efficiency, applicable to mass production and capable of being widely used in the reduction smelting industry.
Description
One, technical field
The utility model belongs to smelting industry material is carried out the equipment of heat treated, relates in particular to a kind of controlled atmosphere rotary hearth furnace of producing DRI.
Two, background technology
At present, generally all comprise by furnace wall usually for the rotary hearth furnace that material is carried out heat treated, furnace roof, the muffle system, combustion system, the body of heater that pipe-line system is formed and by the furnace bottom cast bed of material, at the bottom of the rotatable stove that furnace bottom support system and furnace bottom transmission system constitute and input and output material equipment etc., because material disc directly is installed on the rotatable stove basal surface, flaming in the burner hearth directly heats material under the oxidizing fire condition, this mode can not be applicable to that not only some materials can not directly contact the demand of flaming, if cause excessive temperature differentials in the burner hearth but also exist material to lay blocked up meeting, influence product quality; If material was laid thin, though can solve product quality problem, can influence furnace output simultaneously, the business economic benefit is descended.
Three, summary of the invention
The purpose of this utility model be for smelting industry provide a kind of rational in infrastructure, easy and simple to handle, use safety, high efficiency, direct reduction controlled atmosphere rotary hearth furnace that adjustability is strong.
Technical solution adopted in the utility model is: it comprise the body of heater formed by furnace wall, furnace roof, muffle system, combustion system, pipe-line system and the rotatable stove that constituted by the furnace bottom cast bed of material, furnace bottom support system and furnace bottom transmission system at the bottom of and input and output material equipment.Upper surface at the bottom of rotatable stove evenly arranges the plum blossom wall that support holds the material plate of material, the burner hearth middle part arranges flame shield it is divided into combustion zone, top and the material thermal treatment zone, bottom, outer shroud furnace wall top arranges a plurality of heat-accumulating burners the upper furnace combustion zone is heated, the bottom of interior ring oven wall arranges a plurality of inferior high combustion rate burners the lower furnace portion material is assisted heating, and be provided with on the top of interior ring oven wall that the coal gas that enters the upper furnace combustion zone feeds the hole and air feeds the hole, thereby satisfy various specific reducing atmospheres.Described input and output material equipment comprises cloth feed bin and spiral discharging machine, near the bent envelope of furnace wall place the ramp type hopper that a corrosion resistant plate is made is set at spiral discharging machine simultaneously, and the port of export of this ramp type hopper communicates with the discharge nozzle of spiral discharging machine.
The beneficial effects of the utility model are: since utilize flame shield with material and flame separate, utilize material bottom burner auxiliary heating, utilize the heat storage type combustion on material top, and a plurality of coal gas feeding mouths and air feeding mouth are set, thereby reach essential condition such as to satisfy various specific reducing atmospheres; Set up the ramp type discharge bucket, solved the disadvantage of the leakage material of spiral discharging machine.This kind structure not only can the flexible modulation stove in various specific reducing atmospheres, and automaticity height, the production efficiency height is fit to large-scale production, can be widely used in smelting industry.
The utility model is described in further detail below in conjunction with accompanying drawing.
Four, description of drawings
Fig. 1 is the utility model master TV structure schematic diagram;
Fig. 2 is the utility model discharging structure schematic diagram.
Among the figure: 1 is furnace wall, and 2 is furnace roof, 3 be rotatable stove at the bottom of, 4 is the plum blossom wall, 5 is material plate, 6 is material, and 7 is flame shield, and 8 is heat-accumulating burner, and 9 is inferior high combustion rate burner, and 10 are coal gas feeding hole, 11 for air feeds the hole, and 12 is the ramp type hopper, and 13 is spiral discharging machine, and 14 is discharge nozzle.
Five, the specific embodiment;
As shown in Figure 1, with middle footpath 8m, the direct reduction controlled atmosphere rotary hearth furnace of inner width 1.06m is example, it comprise the body of heater formed by furnace wall, furnace roof, muffle system, combustion system, pipe-line system and the rotatable stove that constituted by the furnace bottom cast bed of material, furnace bottom support system and furnace bottom transmission system at the bottom of and input and output material equipment etc. partly constitute.Described feed system is made up of three grades of distribution cabins; Discharge system is spiral discharging machine 13 compositions such as grade; Pipe-line system is made up of combustion air pipeline, gas pipeline and smoke discharging pipe etc.3 upper surface evenly arranges the plum blossom wall 4 that support holds the material plate 5 of material 6 at the bottom of rotatable stove, the burner hearth middle part arranges flame shield 7, outer shroud furnace wall 1 top arranges heat-accumulating burner 8, the bottom of interior ring oven wall 1 arranges inferior high combustion rate burner 9, top is provided with coal gas and feeds hole 10 and air feeding hole 11, thereby can satisfy various specific reducing atmospheres, not only make rotary hearth furnace can reach high furnace temperature, but also can satisfy the requirement of direct reducing process.Near furnace wall 1 bent envelope place the ramp type hopper 12 that a corrosion resistant plate is made is set simultaneously below spiral discharging machine 13 is installed, the port of export of this ramp type hopper 12 communicates with the discharge nozzle 14 of spiral discharging machine 13.Material gathers the discharging opening that inserts spiral discharging machine 13 through ramp type hopper 12, solved spiral discharging machine 13 the leakage material, disadvantage such as can't carry, for direct reduction industry in enormous quantities, high efficiency production provides good equipment.When implementing the utility model, three grades of distribution cabins are arranged in material 6 at the bottom of the rotatable stove on the material plate 5 of plum blossom wall 4 supports that are built into refractory brick on 3 uniformly, 3 are being with material to pass through the preheating zone successively in burner hearth at the bottom of the rotatable stove, the reducing zone, heat by heat-accumulating burner 8 muffle, assist heating by 9 pairs of materials of inferior high combustion rate burner, feed hole 10 and air feeding hole 11 adjusting furnace atmospheres by coal gas, thereby satisfy material direct reduction reactor needs, material after the reduction is discharged through spiral discharging machine 13, can not drop to by the material of spiral discharging in the discharge nozzle 14 of the spiral discharging machine 13 that discharges out of the furnace in the ramp type hopper 12.
Claims (2)
1. direct reduction controlled atmosphere rotary hearth furnace, it comprises by furnace wall, furnace roof, the muffle system, combustion system, the body of heater that pipe-line system is formed and by the furnace bottom cast bed of material, at the bottom of the rotatable stove that furnace bottom support system and furnace bottom transmission system constitute and input and output material equipment, it is characterized in that: the upper surface of (3) evenly arranges the plum blossom wall (4) of the material plate (5) that support holds material (6) at the bottom of rotatable stove, the burner hearth middle part arranges flame shield (7), outer shroud furnace wall (1) top arranges heat-accumulating burner (8), and the bottom of interior ring oven wall (1) arranges inferior high combustion rate burner (9), top is provided with coal gas and feeds hole (10) and air feeding hole (11).
2. direct reduction controlled atmosphere rotary hearth furnace according to claim 1, it is characterized in that: described discharging equipment is spiral discharging machine (13), and below spiral discharging machine (13), near the bent envelope of furnace wall (1) place the ramp type hopper (12) that a corrosion resistant plate is made being set, the port of export of ramp type hopper (12) communicates with the discharge nozzle (14) of spiral discharging machine (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707550 CN203037048U (en) | 2012-12-20 | 2012-12-20 | Direct-reduction controlled-atmosphere rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220707550 CN203037048U (en) | 2012-12-20 | 2012-12-20 | Direct-reduction controlled-atmosphere rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037048U true CN203037048U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220707550 Expired - Fee Related CN203037048U (en) | 2012-12-20 | 2012-12-20 | Direct-reduction controlled-atmosphere rotary hearth furnace |
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| CN (1) | CN203037048U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789727A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for producing iron beads |
| CN104789725A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for reducing coal-based pellets |
| CN105907909A (en) * | 2016-06-08 | 2016-08-31 | 江苏省冶金设计院有限公司 | Dual-loop rotary hearth furnace |
| CN111365995A (en) * | 2020-03-11 | 2020-07-03 | 绵阳油普能源科技有限责任公司 | Device and method for improving heat energy conversion of heating furnace |
-
2012
- 2012-12-20 CN CN 201220707550 patent/CN203037048U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789727A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for producing iron beads |
| CN104789725A (en) * | 2015-03-31 | 2015-07-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and method for reducing coal-based pellets |
| CN105907909A (en) * | 2016-06-08 | 2016-08-31 | 江苏省冶金设计院有限公司 | Dual-loop rotary hearth furnace |
| CN111365995A (en) * | 2020-03-11 | 2020-07-03 | 绵阳油普能源科技有限责任公司 | Device and method for improving heat energy conversion of heating furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20131220 |