CN213408904U - Iron ore concentrate pellet drying device - Google Patents
Iron ore concentrate pellet drying device Download PDFInfo
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- CN213408904U CN213408904U CN202021198613.8U CN202021198613U CN213408904U CN 213408904 U CN213408904 U CN 213408904U CN 202021198613 U CN202021198613 U CN 202021198613U CN 213408904 U CN213408904 U CN 213408904U
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Abstract
The utility model relates to a pelletizing production technical field specifically discloses an iron ore concentrate pelletizing drying device, including the rotary furnace body, the internal portion of rotary furnace is provided with interior furnace body coaxially, rotary furnace body and interior furnace body fixed connection, the one end of interior furnace body is provided with the inlet pipe, the other end of interior furnace body is provided with first discharge gate, a plurality of mud holes have been seted up uniformly at the interval on the oven of interior furnace body, it has a plurality of grinding balls to fill between rotary furnace body and the interior furnace body, set up a plurality of running through on the oven of rotary furnace body the second discharge gate of rotary furnace body. The iron ore concentrate pellet drying device can effectively screen and reject slag generated by green pellet explosion in the drying process so as to ensure smooth airflow in the furnace body, improve the drying efficiency of the green pellet, grind the slag again so as to be convenient for recycling and improve the production efficiency.
Description
Technical Field
The utility model relates to a pelletizing production technical field especially relates to an iron ore concentrate pelletizing drying device.
Background
Pellet ore is a method of agglomerating finely ground iron ore concentrate or other iron-containing powders. The mixture of concentrate powder, flux and binder is rolled into green pellets with the diameter of 8-15 mm in a pelletizer, and then the green pellets are solidified and molded by a series of physical and chemical changes through drying and roasting or other methods to form the excellent iron-containing raw material with good metallurgical properties for iron and steel smelting. The main procedures of the pelletizing method production comprise the procedures of raw material preparation, mixing, pelletizing, drying and roasting, cooling, finished product and return mine treatment and the like. Impurities and harmful elements in the raw materials can be partially or mostly removed through the ore dressing-pelletizing process, so that the quality of smelting products is ensured, the burden of the smelting process is reduced, and smelting equipment is protected.
Because natural rich ore is gradually reduced and a large amount of lean ore is adopted, the grade of concentrate powder of iron ore after fine grinding and mineral separation is easy to improve, and pellet products are also used for steel making, direct reduction iron making and the like. The pellet has good metallurgical property, uniform granularity, more micro-pores, good reducibility and high strength, and is beneficial to strengthening blast furnace smelting. Therefore, the pellet production process is comprehensively developed and popularized after the twenty-first century.
The fine iron ore drying device in the prior art generally dries in a common rotary kiln, has high processing capacity, uniform drying temperature and good drying quality, but due to various factors such as low grade of the prepared raw materials, overhigh temperature or poor control of the amount of the drying flue gas, green pellets entering the rotary kiln burst, more powder and unsmooth airflow in the kiln, the drying efficiency is low, and the energy consumption is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide an iron ore concentrate pelletizing drying device, iron ore concentrate pelletizing drying device can sieve the rejection to the slag that the green ball burst and produce effectively at the stoving in-process to guarantee that the air current is unobstructed in the furnace body, improve the drying efficiency of green ball and grind the recycle of being convenient for once more to the slag, improve production efficiency.
In order to achieve the technical effects, the utility model adopts the following technical scheme:
the utility model provides an iron ore concentrate pelletizing drying device, includes the rotary furnace body, the internal portion of rotary furnace is provided with interior furnace body coaxially, rotary furnace body and interior furnace body fixed connection, the one end of interior furnace body is provided with the inlet pipe, the other end of interior furnace body is provided with first discharge gate, a plurality of row's cinder holes have been seted up at the interval uniformly on the oven of interior furnace body, it has a plurality of grinding balls to fill between rotary furnace body and the interior furnace body, set up a plurality of second discharge gates that run through rotary furnace body on rotary furnace body's the oven.
Furthermore, a plurality of lifting plates are arranged in the inner furnace body.
Furthermore, the inner furnace body is also provided with a high-temperature flue gas inlet at the same side of the feed inlet.
Furthermore, all be provided with the hopper below the second discharge gate.
Further, the second discharge gate all is provided with discharge baffle, a plurality of circular feed openings have been seted up on the discharge baffle at the interval uniformly, the diameter of feed opening is less than the diameter of grinding ball.
Compared with the prior art, the utility model provides a pair of iron ore concentrate pelletizing drying device's beneficial effect lies in: this iron ore concentrate pelletizing drying device when drying the pelletizing through high temperature flue gas, still can in time will burst the outside of smashing the back slag and sieve to interior furnace body, and rotary furnace body pivoted in-process smashes once more through grinding team's slag, and the outside of discharge to rotary furnace body is passed through the second discharge gate to the thin slag after smashing, is convenient for retrieve once more and prepares into green ball and carries out drying and calcination, can effectively improve the drying efficiency of pelletizing in the interior furnace body.
Drawings
Fig. 1 is a schematic view of an overall structure of an iron ore concentrate pellet drying apparatus according to an embodiment of the present invention;
fig. 2 is a front view of an a-side of an iron ore concentrate pellet drying apparatus provided in an embodiment of the present invention;
the reference signs are: 10-base, 11-hopper, 20-revolving furnace body, 201-discharge baffle, 201 a-feed opening, 30-inner furnace body, 301-slag discharge hole, 40-material raising plate, 40 a-fixed plate, 40 b-bent plate, 50-spoke, 60-high temperature flue gas inlet, 70-feed pipe and 80-grinding ball.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-2, the iron ore concentrate pellet drying device provided in this embodiment includes a base 10, a rotary furnace body 20 is disposed on the base 10, and the rotary furnace body 20 is installed at a certain angle with the horizontal plane, preferably, the installation angle is 3 ° to 8 °, an inner furnace body 30 is coaxially disposed inside the rotary furnace body 20, the rotary furnace body 20 is fixedly connected to the inner furnace body 30, both ends of the rotary furnace body 20 and the inner furnace body 30 are rotatably connected to the base 10, a feeding pipe 70 is disposed at one end of the inner furnace body 30, a first discharge hole is disposed at the other end of the inner furnace body 30,
the furnace wall of the inner furnace body 30 is uniformly provided with a plurality of slag discharge holes 301 at intervals, the slag discharge holes are used for screening slag generated after green pellets burst to the outside of the inner furnace body 30, so that the material quantity in the inner furnace body 30 is reduced, the air flow speed in the inner furnace body 30 is improved, the drying efficiency is ensured, a plurality of grinding balls 80 are filled between the rotary furnace body 20 and the inner furnace body 30, the grinding balls 80 grind the slag entering the rotary furnace body 20 from the inner furnace body 30 again, the furnace wall of the rotary furnace body 20 is provided with a plurality of second discharge holes penetrating through the rotary furnace body 20, the ground slag can be discharged from the second discharge holes and recycled for re-balling, so that the utilization rate of raw materials is improved, and the ground slag can have better forming performance and metallurgical performance when being re-balling.
In this embodiment, the two ends of the rotary furnace body 20 and the inner furnace body 30 are fixedly connected by the spokes 50, so that the rotary furnace body 20 and the inner furnace body 30 have the same rotating speed and are convenient to clean and manufacture.
In this embodiment, the slag discharging hole 301 is circular and the diameter of the slag discharging hole 301 is 5-10 mm.
In this embodiment, a plurality of material raising plates 40 are disposed in the inner furnace body 30, and the material raising plates 40 are uniformly distributed in the inner furnace body 30 at intervals, preferably 6-12.
In this embodiment, the material lifting plate 40 includes a fixing plate 40a and a bending plate 40b, the fixing plate 40a and the inner furnace body 30 are integrally formed, and an installation angle between the bending plate 40b and the bending plate 40b is 125 ° to 165 °, and preferably 160 °.
In this embodiment, the inner furnace body 30 is in the homonymy of feed inlet still is provided with high temperature flue gas entry 60, high temperature flue gas with inlet pipe 70 sets up at the homonymy, is convenient for slow down the rate of rise of temperature of green ball, reduces the green ball and bursts.
In this embodiment, all be provided with hopper 11 below the second discharge gate, hopper 11 is used for connecing the slag after smashing greatly, is convenient for carry out recycle once more.
In this embodiment, the equal fixed mounting of second discharge gate has discharge baffle 201, a plurality of circular feed openings 201a have been seted up evenly at the interval on discharge baffle 201, the diameter of feed opening 201a is less than grinding ball 80's diameter, just grinding ball 80's diameter is also greater than the row cinder notch.
Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (5)
1. The utility model provides an iron ore concentrate pelletizing drying device which characterized in that: including rotary furnace body (20), rotary furnace body (20) inside is provided with interior furnace body (30) coaxially, rotary furnace body (20) and interior furnace body (30) fixed connection, the one end of interior furnace body (30) is provided with inlet pipe (70), the other end of interior furnace body (30) is provided with first discharge gate, a plurality of row's cinder hole (301) have been seted up uniformly at the interval on the oven of interior furnace body (30), it has a plurality of grinding balls (80) to fill between rotary furnace body (20) and interior furnace body (30), set up a plurality of second discharge gates that run through rotary furnace body (20) on rotary furnace body (20's the oven.
2. The iron ore concentrate pellet drying device of claim 1, wherein: a plurality of material raising plates (40) are arranged in the inner furnace body (30).
3. The iron ore concentrate pellet drying device of claim 1, wherein: the inner furnace body (30) is also provided with a high-temperature flue gas inlet (60) at the same side of the feeding pipe (70).
4. The iron ore concentrate pellet drying device of claim 1, wherein: and hoppers (11) are arranged below the second discharge holes.
5. The iron ore concentrate pellet drying device of claim 1, wherein: the second discharge gate all is provided with discharge baffle (201), a plurality of circular feed opening (201a) have been seted up on discharge baffle (201) at the interval uniformly, the diameter of feed opening (201a) is less than the diameter of grinding ball (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021198613.8U CN213408904U (en) | 2020-06-24 | 2020-06-24 | Iron ore concentrate pellet drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021198613.8U CN213408904U (en) | 2020-06-24 | 2020-06-24 | Iron ore concentrate pellet drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213408904U true CN213408904U (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021198613.8U Active CN213408904U (en) | 2020-06-24 | 2020-06-24 | Iron ore concentrate pellet drying device |
Country Status (1)
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|---|---|
| CN (1) | CN213408904U (en) |
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2020
- 2020-06-24 CN CN202021198613.8U patent/CN213408904U/en active Active
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