CN219470139U - Device for pressing ball of return ore of blast furnace - Google Patents
Device for pressing ball of return ore of blast furnace Download PDFInfo
- Publication number
- CN219470139U CN219470139U CN202320724517.XU CN202320724517U CN219470139U CN 219470139 U CN219470139 U CN 219470139U CN 202320724517 U CN202320724517 U CN 202320724517U CN 219470139 U CN219470139 U CN 219470139U
- Authority
- CN
- China
- Prior art keywords
- bin
- stirring
- horizontal
- double
- blast furnace
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model belongs to the technical field of sintering, and discloses a blast furnace return ore ball pressing device, which comprises: the stirring device is used for stirring the blast furnace return ores, the laterite-nickel ores and the binder which are proportioned according to the set mass ratio; the rolling device is used for rolling the stirred materials transferred from the stirring device through the transferring device so as to form semi-finished wet balls; and the drying device is used for drying the semi-finished wet balls transferred from the rolling device through the transfer device to obtain finished balls. The device for pressing the ball by the blast furnace return ore avoids the repeated sintering of the excessive blast furnace return ore in the sintering system, releases the sintering productivity, reduces the energy consumption and reduces the environmental pollution of sintering.
Description
Technical Field
The utility model belongs to the technical field of sintering, and particularly relates to a device for pressing balls in return ores of a blast furnace.
Background
In domestic blast furnace production, the sintered ore is the main raw material, the iron material accounts for 60-90%, and about 30% of the return ore in the sintering production is circularly re-burned, and the sintered ore with the granularity of more than 5mm under the blast furnace tank can be directly used as a finished product for smelting.
The blast furnace return ores are sintered ore powders with granularity smaller than 5mm screened out from the lower part of a blast furnace tank, and small-granularity sintered ores with a large proportion in the blast furnace return ores are sent to a sintering plant and returned to the blast furnace tank after being mixed, sintered and other processes, but the return ores are returned between an iron-making plant and the sintering plant, and the sintering process is repeated, so that the production cost is greatly increased and the energy consumption is improved; after the sinter is granulated, even if the granularity is above 5mm, the sinter cannot be broken in the belt running and discharging processes, and in order to ensure good air permeability in a blast furnace, the sinter is screened once before entering the blast furnace, and the sinter with the granularity less than 5mm is screened out and returned to the sintering process for re-production.
The small-granularity sintered ore is cold consolidated and formed and then returned to the blast furnace, so that the resource recycling is realized, the environmental pollution is reduced, and the energy consumption is reduced. The cold consolidation forming process is to add proper adhesive to various kinds of dust produced in the steel production process, mix the dust evenly, press the mixed material into block materials with certain shape, size, density and strength under certain pressure, and bake the block materials correspondingly or solidify naturally to form the block materials with higher strength. But the baking and drying increases the energy consumption, the production cost is higher, and the natural drying process has certain environmental pollution, although the natural drying process has no energy consumption, the drying speed of the pellets is slower, so that the effect of the binder is poor, the strength is improved slowly, the water content of the pellets cannot be effectively reduced, the metallurgical effect of the product is greatly reduced, and the required natural drying place is also larger.
Taking a certain factory as an example, the sintered ore accounts for 90% of the iron-containing furnace material in the blast furnace production, and 35% of the blast furnace return ore is circularly re-burned in the production of the sintering process, the annual return ore of the blast furnace reaches 90 ten thousand tons, the energy consumption of a finished product sintered by ton return ore is 50Kggce/t, and the energy consumption of a finished product sintered by annual return ore is 45000000Kggce/t.
The prior art has the following defects and shortcomings: the existing ore returning mode causes insufficient sintering capacity, high energy consumption, increased cost and increased environmental protection pressure, and does not meet the national carbon-to-carbon peak neutralization policy requirements.
Disclosure of Invention
The utility model provides a blast furnace return ore ball pressing device, which solves the problems of cyclic re-firing and excessive sintering energy consumption of the existing return ore in a sintering system.
In order to achieve the above purpose, the present application provides the following technical solutions:
a blast furnace return ore pressing ball device, comprising: the stirring device is used for stirring the blast furnace return ores, the laterite-nickel ores and the binder which are proportioned according to the set mass ratio; the rolling device is used for rolling the stirred materials transferred from the stirring device through the transferring device so as to form semi-finished wet balls; and the drying device is used for drying the semi-finished wet balls transferred from the rolling device through the transfer device to obtain finished balls.
Further, in the apparatus as described above, the stirring device includes a mixing bin and a stirring bin, wherein: the mixing bin comprises a first bin, a second bin and a mixing bin, wherein the first bin is used for containing laterite-nickel ore, the second bin is used for containing blast furnace return ore, and the mixing bin is used for mixing the laterite-nickel ore and the blast furnace return ore which are input according to a set mass ratio to obtain a mixture; the stirring bin comprises a binder feeding device and a stirring bin, the binder feeding device comprises a binder barrel and a feeding device for providing binder for the stirring bin, and the binder barrel is used for containing the binder; the stirring bin is used for providing a place for stirring laterite nickel ore, blast furnace return ore and binder which are proportioned according to a set mass ratio.
Further, in the device, the stirring bin comprises a first double-horizontal-shaft stirrer stirring bin and a second double-horizontal-shaft stirrer stirring bin; the stirring device comprises a first double-horizontal-shaft stirrer and a second double-horizontal-shaft stirrer; the first double-horizontal-shaft stirrer is arranged in a stirring bin of the first double-horizontal-shaft stirrer and is used for stirring the mixture and the adhesive which is put into the stirring bin according to a set mass ratio for the first time to obtain a first stirring material; the second double-horizontal-shaft stirrer is arranged in the stirring bin of the second double-horizontal-shaft stirrer and is used for stirring the first stirring material for the second time to obtain a second stirring material serving as the material.
Further, in the apparatus as described above, the supply means for supplying the binder to the stirring hopper includes: the third belt scale is arranged below the adhesive charging basket, is used for weighing the adhesive of the adhesive charging basket and conveying the adhesive to the third belt conveyor; the third belt conveyor is arranged below the third belt scale and is used for conveying the bonding agent from the third belt scale weighed according to the set mass ratio to the stirring bin of the first double-horizontal-shaft stirrer.
Further, in the device as described above, the device further includes a screening device, where the screening device is configured to screen the semi-finished wet balls generated by the rolling device, so as to screen out waste materials with a size smaller than a set size, and convey the screened semi-finished wet balls to the drying device.
Further, in the apparatus as described above, the drying apparatus includes a drying chamber, a chain plate machine, and a gate valve provided in the drying chamber; the gate valve is used for bearing wet balls of the semi-finished products to be dried after being screened by the screening device; the drying chamber is used for providing a space for drying the semi-finished wet balls; and a chain plate machine is arranged below the gate valve and used for conveying finished balls falling from the gate valve to a finished product warehouse.
Further, in the apparatus as described above, the transfer device includes: the first belt scale is arranged below the first bin and is used for weighing the laterite-nickel ore of the first bin and conveying the laterite-nickel ore to the mixing bin; the second belt scale is arranged below the second bin and is used for weighing the blast furnace return ores of the second bin and conveying the blast furnace return ores to the mixing bin; the first conveyor belt is arranged below the mixing bin and is used for conveying the mixture from the mixing bin to the first double-horizontal-shaft stirrer stirring bin; the first belt conveyor is used for conveying the materials output by the stirring device to the rolling device; the second conveyor belt is arranged below the rolling device and is used for conveying the semi-finished wet balls from the rolling device to a second belt conveyor; a second belt conveyor for conveying the semi-finished wet pellets from the second conveyor belt to the screening device; and the third conveyor belt is arranged below the screening device and is used for conveying the waste materials smaller than the set size from the screening device to the stirring bin of the first double-horizontal-shaft stirrer.
Further, in the device, the device comprises a dust removing device, wherein the dust removing device comprises a dust remover and is used for removing dust generated in the process of conveying the laterite-nickel ore and the blast furnace return ore to the mixing bin.
Further, in the apparatus as described above, the dust collector is a bag collector.
Further, in the device as described above, an observation window is provided on the first double-horizontal-shaft mixer mixing bin, and the mixing condition in the first double-horizontal-shaft mixer mixing bin can be seen through the observation window.
The technical scheme of the utility model has the following beneficial effects:
1. the repeated sintering of excessive blast furnace return ores in a sintering system is avoided, and the sintering productivity is released; the method comprises the steps of carrying out a first treatment on the surface of the
2. The energy consumption is reduced, and the environmental pollution of sintering is reduced;
3. the blast furnace return ore pressing balls (semi-finished wet balls) replace part of sinter, so that the clinker ratio of the blast furnace is improved, the fuel ratio of the blast furnace is greatly reduced, and the stability and the continuity of the blast furnace production are improved;
4. the blast furnace return ore pressing balls (semi-finished wet balls) have uniform granularity, low water content and less powder, and the air permeability of the material column is improved.
Drawings
FIG. 1 is a schematic diagram of a blast furnace return ore ball pressing device according to the present utility model;
FIG. 2 is a schematic mixing diagram of a device for pressing balls in return ores of a blast furnace according to the utility model;
FIG. 3 is a schematic stirring view of a device for pressing balls in return ores of a blast furnace according to the present utility model;
FIG. 4 is a schematic diagram of a screening of a blast furnace return ore briquetting apparatus according to the present utility model;
FIG. 5 is a schematic diagram of a screen plate of a device for pressing balls in return ores of a blast furnace according to the present utility model;
fig. 6 is a schematic drying diagram of a device for pressing pellets in return ores in a blast furnace according to the present utility model.
The figure number description: the device comprises a first bin 1, a second bin 2, a dust removing pipeline 3, a first belt scale 4, a mixing bin 5, a first conveyor belt 6, a dust removing hood 7, a second belt scale 8, a dust removing bin 9, a dust remover 10, a draught fan 11, a chimney 12, a double-horizontal-shaft stirrer feed inlet 13, a first double-horizontal-shaft stirrer stirring bin 14, an observation window 15, a binder feeding inlet 16, a binder charging bucket 17, a spiral stranding cage 18, a binder feeding platform 19, a first double-horizontal-shaft stirrer stirring bin discharge port 20, a second double-horizontal-shaft stirrer stirring bin 21, a second double-horizontal-shaft stirrer stirring bin discharge port 22, a first belt conveyor 23, a high-pressure ball stirrer feed inlet 24, a spiral conveyor 25, a compression roller 26, a second conveyor belt 27, a second belt conveyor 28, a mineral screen 29, a material blocking screen 30, a third conveyor belt 31, a hot blast stove 32, a gas pipeline 33, a gas pipe 34, a combustion chamber 35, an exhaust fan 36, a hot blast pipeline 37, a feeding inlet 38, a blower 39, a gate valve 40, a screen plate 40 and a screen plate machine 41.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model provides a blast furnace return ore pressing device with detailed description referring to figures 1-6, wherein figure 1 is a schematic diagram of the blast furnace return ore pressing device; FIG. 2 is a schematic mixing diagram of a device for pressing balls in return ores of a blast furnace according to the utility model; FIG. 3 is a schematic stirring view of a device for pressing balls in return ores of a blast furnace according to the present utility model; FIG. 4 is a schematic diagram of a screening of a blast furnace return ore briquetting apparatus according to the present utility model; FIG. 5 is a schematic diagram of a screen plate of a device for pressing balls in return ores of a blast furnace according to the present utility model; fig. 6 is a schematic drying diagram of a device for pressing pellets in return ores in a blast furnace according to the present utility model.
Briefly, the device for pressing the ball in the return ore of the blast furnace provided by the utility model is briefly described as follows:
the blast furnace return ore pressing ball device comprises: the device comprises a rolling device, a drying device, a stirring device, a dust removing device, a screening device and a transferring device;
the stirring device is used for stirring the blast furnace return ores, the laterite-nickel ores and the binder which are proportioned according to the set mass ratio;
the rolling device is used for rolling the stirred materials transferred from the stirring device through the transferring device to form semi-finished wet balls;
the drying device is used for drying the semi-finished wet balls transferred from the rolling device through the transferring device to obtain finished balls; and
and the transferring device is used for transferring the materials among the stirring device, the rolling device and the drying device.
The agitating unit includes mixing still and stirring still, wherein:
the mixing bin comprises a first bin 1, a second bin 2 and a mixing bin 5, wherein the first bin 1 is used for containing laterite-nickel ore, the second bin 2 is used for containing blast furnace return ore, and the mixing bin 5 is used for mixing the laterite-nickel ore and the blast furnace return ore which are input according to a set mass ratio to obtain a mixture;
the stirring bin comprises a binder feeding device and a stirring bin, the binder feeding device comprises a binder barrel 17 and a feeding device for providing binder for the stirring bin, and the binder barrel 17 is used for containing the binder;
The stirring bin is used for providing a place for stirring laterite nickel ore, blast furnace return ore and binder which are proportioned according to a set mass ratio.
The stirring bin comprises a first double-horizontal-shaft stirrer stirring bin 14 and a second double-horizontal-shaft stirrer stirring bin 21;
the stirring device comprises a first double-horizontal-shaft stirrer and a second double-horizontal-shaft stirrer;
the first double-horizontal-shaft stirrer is arranged in the stirring bin 14 of the first double-horizontal-shaft stirrer and is used for stirring the mixture and the adhesive which is put in according to the set mass ratio for the first time to obtain a first stirring material; the second double-horizontal-shaft stirrer is installed in the stirring bin 21 of the second double-horizontal-shaft stirrer and is used for stirring the first stirring material for the second time to obtain a second stirring material serving as the material (namely the stirred material).
The supply device for supplying the binder to the stirring bin comprises: a third belt scale and a third belt conveyor,
the third belt scale is arranged below the adhesive bucket 17 and is used for weighing the adhesive of the adhesive bucket 17 and conveying the adhesive to the third belt conveyor;
the third belt conveyor is arranged below the third belt scale and is used for conveying the bonding agent from the third belt scale according to the set mass ratio to the first double-horizontal-shaft stirrer stirring bin 14;
Before drying, the blast furnace return ore ball pressing device further comprises a screening device, wherein the screening device is used for screening the semi-finished wet balls generated by the rolling device so as to screen out waste materials with the size smaller than the set size, and the screened semi-finished wet balls are conveyed to the drying device. The screening device comprises a mineral screen 29 for screening out semi-finished wet balls with a certain size or more; the semi-finished wet balls with the diameter of more than or equal to 25mm are screened out through a mineral screen 29.
The transfer device comprises a first belt balance 4, a second belt balance 8, a first conveyor belt 6, a second conveyor belt 27, a third conveyor belt 31, a first belt conveyor 23 and a second belt conveyor 28;
the first belt scale 4 is arranged below the first storage bin 1 and is used for weighing the laterite-nickel ore in the first storage bin 1 and conveying the laterite-nickel ore to the mixing storage bin 5;
the second belt scale 8 is arranged below the second bin 2 and is used for weighing the blast furnace return ores of the second bin 2 and conveying the blast furnace return ores to the mixing bin 5;
the first conveyor belt 6 is arranged below the mixing bin 5 and is used for conveying the mixture from the mixing bin 5 to the first double horizontal shaft stirrer stirring bin 14;
a first belt conveyor 23 for conveying the material output from the stirring device to the rolling device;
A second conveyor belt 27, disposed below the rolling means, for conveying the semi-finished wet pellets from the rolling means to a second belt conveyor 28;
a second belt conveyor 28 for conveying the semi-finished wet pellets from the second conveyor belt 27 to the screening device;
a third conveyor 31, disposed below the screening apparatus, for transporting waste material from the screening apparatus smaller than the set size to the first twin horizontal axis blender blending hopper 14.
The rolling device is a high-pressure ball press, the high-pressure ball press comprises a press roller 26, and the press roller 26 is arranged at the lower part of the high-pressure ball press and is used for pressing the second stirring material into semi-finished wet balls with certain specification.
The drying device comprises a drying chamber 39, a chain plate machine 41 and a gate valve 40 arranged in the drying chamber 39; the gate valve 40 is used for bearing semi-finished wet balls to be dried, that is, the gate valve 40 is used for bearing semi-finished wet balls to be dried after being screened from the screening device; a drying chamber 39 for providing a space for drying the semi-finished wet pellets; a chain plate machine 41 is arranged below the gate valve 40, and the chain plate machine 41 is used for conveying finished balls falling from the gate valve 40 to a finished product warehouse.
The blast furnace return ore ball pressing device also comprises a dust removing device, wherein the dust removing device comprises a dust remover 10 for removing dust generated in the process of conveying the laterite nickel ore and the blast furnace return ore to the mixing bin 5; a dust and ash bin 9 is arranged below the dust remover 10 and is used for containing dust precipitated after dust removal; the dust removal device further comprises an induced draft fan 11 for guiding the flue gas generated by dust removal to be discharged through a chimney 12.
Preferably, the dust collector 10 is a bag filter.
The method for pressing the ball by the return ore of the blast furnace comprises the following steps:
firstly, mixing and stirring: mixing and stirring the blast furnace return ores, the laterite-nickel ores and the binder which are proportioned according to the set mass ratio;
and secondly, ball pressing and forming: pressing the stirred material into semi-finished wet balls;
and step three, drying: and drying the semi-finished wet balls into finished balls.
Before the first step of mixing and stirring, mixing raw material laterite nickel ore and blast furnace return ore according to a set mass ratio to obtain a mixture, and adding a binder with a certain mass ratio for mixing; wherein, the mass ratio of the laterite nickel ore is 8-15%, the mass ratio of the blast furnace return ore is 81-89%, and the mass ratio of the binder is 3-5%; preferably, the mass ratio of the laterite nickel ore is 15%, the mass ratio of the blast furnace return ore is 81%, and the mass ratio of the binder is 4.
Before the third step of drying, the semi-finished wet pellets need to be screened through a screen 29; screening out semi-finished wet balls with the diameter of more than or equal to 25 mm; the semi-finished wet balls smaller than 25mm are sent to the stirring bin 14 of the first double horizontal shaft stirrer again for stirring.
In the first step, the mixture and the binder are stirred for the first time in a stirring bin 14 of a first double-horizontal-shaft stirrer, the rotation number of the first double-horizontal-shaft stirrer is set to be 60r/min, and the stirring is carried out for 3min, so that a first stirring material is obtained; and stirring the first stirring material for the second time in a stirring bin 21 of a second double-horizontal-shaft stirrer, wherein the rotation number of the second double-horizontal-shaft stirrer is set to be 80r/min, and stirring is carried out for 3min, so as to obtain the second stirring material.
The utility model provides a device for pressing a ball in return ore of a blast furnace.
The device for pressing the return ores of the blast furnace comprises a rolling device, a drying device, a stirring device, a dust removing device, a screening device and a transferring device, wherein the rolling device and the drying device are adopted in the embodiment;
the mixing bin comprises a first bin 1, a second bin 2 and a mixing bin 5, wherein the first bin 1 is used for containing laterite-nickel ore, the second bin 2 is used for containing blast furnace return ore, and the mixing bin 5 is used for mixing the laterite-nickel ore and the blast furnace return ore which are input according to a set mass ratio to obtain a mixture;
the stirring bin comprises a binder feeding device and a stirring bin, the binder feeding device comprises a binder barrel 17 and a feeding device for providing binder for the stirring bin, and the binder barrel 17 is used for containing the binder. According to the mass ratio of the laterite-nickel ore to the blast furnace return ore, the using amount of the binder is regulated, so that the uniform distribution of the binder is ensured, and the use efficiency is improved. The binder can be a liquid binder or a solid binder, and the solid binder needs to be added with water with a certain mass, for example, a certain brand of powdery solid binder is added with water to be mixed to obtain the liquid binder, and the mass ratio of the added water to the solid binder is 2:1.
The stirring bin is used for providing a place for stirring laterite nickel ore, blast furnace return ore and binder which are proportioned according to a set mass ratio.
The stirring bin comprises a first double-horizontal-shaft stirrer stirring bin 14 and a second double-horizontal-shaft stirrer stirring bin 21; the first double horizontal shaft mixer mixing bin 14 provides a location for the first mixing; the second double horizontal shaft mixer mixing bin 21 provides a place for the second mixing;
in one embodiment, the supply of adhesive to the mixing silo is a spiral auger 18, and the adhesive is delivered to the first twin horizontal axis mixer mixing silo 14 by the spiral auger 18.
In another embodiment, the supply means for supplying the adhesive to the mixing silo is a third belt conveyor by which the adhesive is transported to the first double horizontal axis mixer mixing silo 14.
As shown in fig. 1, a first bin discharge hole is formed in the lower portion of a first bin 1, a first belt scale 4 is arranged below the first bin 1, 15% of dried laterite-nickel ore is weighed out by the first belt scale 4 and is sent to a mixing bin 5, wherein the laterite-nickel ore is dried by a rotary kiln (the hearth outlet temperature is 1050 ℃, and the rotating speed is 600 r/min) until the moisture content is less than or equal to 16%; the second feed bin 2 and the first feed bin 1 have the same structure, namely, a second feed bin discharge hole is formed in the lower portion of the second feed bin 2, a second belt scale 8 is arranged below the second feed bin 2, 81% of blast furnace return ores are weighed out through the second belt scale 8, and the blast furnace return ores are sent to a mixing feed bin 5 and 15% of dried laterite-nickel ores to be mixed to obtain a mixture. The mixing silo 5 is arranged below the first belt conveyor scale 4, and the mixing silo 5 is also arranged below the second belt conveyor scale 8.
The laterite nickel ore and the blast furnace return ore generate dust in the process of being sent to the mixing bin 5, and the dust is removed by a dust removing device (namely a dust remover 10). The dust removing device includes: the dust and ash collection device comprises a dust and ash collection bin 9, a dust remover 10, an induced draft fan 11 and a chimney 12.
The dust removing pipeline 3 is arranged above the first bin 1 and the second bin 2, and the dust enters the dust remover 10 through the dust removing pipeline 3 to remove dust, and the dust remover 10 is preferably a bag type dust remover; the dust bin 9 is arranged below the dust remover 10, dust is deposited into the dust bin 9 after dust removal, a plurality of dust bins 9 can be arranged, and preferably, 2 dust bins 9 are arranged; the dust bin 9 is provided with a dust discharge opening at its lower part, and a cart may be provided below the dust discharge opening, through which the dust in the dust bin 9 is carried out, which in a specific embodiment is carried to a dust bin. The flue gas generated by dust removal is discharged from a chimney 12 under the action of an induced draft fan 11.
In a specific embodiment, a dust removing hood 7 is arranged above the mixing bin 5 and is used for removing dust, and the dust removing hood 7 is communicated with the dust removing pipeline 3, so that dust can enter the dust remover 10 through the dust removing pipeline 3.
The first conveyer belt 6 sets up in the below of mixing silo 5, and the lower part of mixing silo 5 is provided with the mixing silo discharge gate, transports the mixture to two horizontal axis mixer feed inlets 13 through first conveyer belt 6, and two horizontal axis mixer feed inlets 13 are located the upper portion of two horizontal axis mixers, and the mixture is carried in the first two horizontal axis mixer stirring storehouse 14 through two horizontal axis mixer feed inlets 13.
In one embodiment, as shown in FIG. 2, the rotational speed of the spiral wringing cage 18 is set to 50r/min, and the adhesive is conveyed into the first double horizontal shaft mixer mixing bin 14 through the spiral wringing cage 18 according to the 4% ratio for mixing.
In another embodiment, a third belt scale (not shown) is disposed below the adhesive bucket 17, and a third belt conveyor is disposed below the third belt scale; the adhesive was weighed out by a third belt scale by 4% and transferred to a third belt conveyor, which then transferred the adhesive to the first twin-horizontal-shaft mixer hopper 14.
The stirring device comprises: a first double-horizontal-shaft stirrer and a second double-horizontal-shaft stirrer; the stirring twice is for letting the more even of material mixing, and the revolution setting of stirring twice is different, and the stirring twice is bigger than the setting of stirring revolution for the first time, and intensity is stronger.
The first double-horizontal-shaft stirrer comprises a double-horizontal-shaft stirrer feed inlet 13 and a first double-horizontal-shaft stirrer stirring bin discharge outlet 20;
the second double-horizontal-shaft mixer comprises: the second double horizontal shaft mixer mixes the storehouse discharge gate 22.
As shown in FIG. 2, the number of revolutions of the first twin horizontal mixer was set to 60r/min. The binder and the mixture were stirred for the first time in the first twin-horizontal-shaft stirrer stirring tank 14 for 3 minutes to obtain a first stirred material. The first double-horizontal-shaft stirrer stirring bin discharge port 20 is arranged at the lower part of the first double-horizontal-shaft stirrer stirring bin 14, the first stirring material is input into the second double-horizontal-shaft stirrer stirring bin 21 through the first double-horizontal-shaft stirrer stirring bin discharge port 20 for secondary stirring, the second double-horizontal-shaft stirrer stirring bin 21 is arranged below the first double-horizontal-shaft stirrer stirring bin 14, the revolution number of the second double-horizontal-shaft stirrer is set to 80r/min, and stirring is carried out for 3min, so that the second stirring material is obtained.
In a specific embodiment, the first double-horizontal-shaft stirrer stirring bin 14 is provided with a viewing window 15, and the viewing window 15 is made of transparent materials, such as glass, resin and the like, so that stirring conditions in the first double-horizontal-shaft stirrer stirring bin 14 can be seen through the viewing window 15.
In a specific embodiment, the outer side of the stirring bin 14 of the first double-horizontal-shaft stirrer is provided with an adhesive feeding platform 19, the bottom of the adhesive feeding platform 19 is higher than the discharge hole 20 of the stirring bin of the first double-horizontal-shaft stirrer, and the adhesive feeding platform 19 provides support for the adhesive bucket 17, that is, the adhesive bucket 17 can be arranged on the adhesive feeding platform 19.
The second double-horizontal-shaft stirrer stirring bin discharge hole 22 is formed in the lower portion of the second double-horizontal-shaft stirrer stirring bin 21, second stirring materials are conveyed to the first belt conveyor 23 through the second double-horizontal-shaft stirrer stirring bin discharge hole 22, and the first belt conveyor 23 is arranged below the second double-horizontal-shaft stirrer stirring bin 21.
The rolling device is a ball press, preferably the ball press is a high-pressure ball press; the specification requirement of the high-pressure ball press is more than or equal to 200KN/CM; in the following, a high-pressure ball press is described as an example, which comprises a press roll 26, i.e. the stirred material is pressed into semi-finished wet balls by the press roll 26.
Specifically, the first belt conveyor 23 conveys the second stirring material to the feeding port 24 of the high-pressure ball press, the feeding port 24 of the high-pressure ball press is arranged at the upper part of the high-pressure ball press, and the second stirring material is conveyed to the position of the compression roller 26 through the screw conveyor 25; the press roll 26 is provided at the lower part of the high-pressure ball press.
The diameter of the press roll 26 of the high-pressure ball press is set to 800mm, the roll width is set to 500mm, the maximum pressure among the rolls is set to 380t, the specific linear pressure is set to 8t/cm, and the press roll 26 presses the second stirring material into semi-finished wet balls with the specification of 50 x 40 x 25 mm.
The second conveyor belt 27 is disposed below the press roller 26, and the above-mentioned semi-finished wet balls are naturally conveyed onto the second conveyor belt 27 by their own weight.
A screening device is also arranged between the rolling device and the drying device;
the screening device comprises a mineral screen 29 and a material blocking screen 30;
as shown in fig. 4 and 5, the semi-finished wet pellets are transported to a screen 29 by a second conveyor belt 27 and a second belt conveyor 28; wherein, the inclination angle of the second belt conveyor 28 is controlled below 35 degrees, so as to ensure that the condition that the semi-finished wet balls roll out of the second belt conveyor 28 does not occur in the transportation process.
The screen 29 is used for screening the semi-finished wet pellets produced by the rolling device, removing waste materials with a size smaller than a set size, and conveying the screened semi-finished wet pellets to the drying device. Preferably, the screening size is set to be 25mm, the third conveyor belt 31 is arranged below the mineral screen 29, the screen plate 32 is arranged on the mineral screen 29, the semi-finished wet balls are screened by the screen plate 32 with the aperture of 25mm, the semi-finished wet balls smaller than 25mm fall onto the third conveyor belt 31 and are sent into the first double horizontal shaft stirrer stirring bin 14 again to be stirred, and the semi-finished wet balls larger than 25mm fall to the ground directly and are collected and sent into the drying chamber 39 to be dried.
In a specific embodiment, a material blocking screen 30 is arranged between the second belt conveyor 28 and the screen 29, and the material blocking screen 30 is in a vertical state and is located above the third conveyor belt 31 and is used for blocking semi-finished wet balls smaller than 25mm and preventing the semi-finished wet balls from splashing.
And the transferring device is used for transferring the materials among the stirring device, the rolling device and the drying device.
The transfer device comprises a first belt balance 4, a second belt balance 8, a first conveyor belt 6, a first belt conveyor 23, a second conveyor belt 27, a second belt conveyor 28 and a third conveyor belt 31;
the first belt scale 4 is arranged below the first storage bin 1 and is used for weighing the laterite-nickel ore in the first storage bin 1 and conveying the laterite-nickel ore to the mixing storage bin 5;
the second belt scale 8 is arranged below the second bin 2 and is used for weighing the blast furnace return ores of the second bin 2 and conveying the blast furnace return ores to the mixing bin 5;
the first conveyor belt 6 is arranged below the mixing silo 5 for transporting the mix from the mixing silo 5 to a first double horizontal shaft mixer mixing silo 14.
A first belt conveyor 23 for conveying the second stirring material output by the stirring device to the high-pressure ball press;
a second conveyor belt 27 disposed below the press roller 26 for conveying the semi-finished wet pellets from the press roller 26 to a second belt conveyor 28;
A second belt conveyor 28 for conveying the semi-finished wet pellets from the second conveyor belt 27 to the screen 29;
a third conveyor 31, arranged below the screen 29, is used to transport semi-finished wet pellets smaller than 25mm from the screen 29 to the first twin horizontal axis mixer hopper 14.
The drying device comprises: a gas pipeline 33, a blower 34, a combustion chamber 35, an exhaust fan 36, a hot air pipeline 37, a hot air furnace feed inlet 38, a drying chamber 39 and a chain scraper 41;
in one embodiment, as shown in FIG. 6, semi-finished wet pellets greater than 25mm falling to the ground are collected with a forklift; a gate valve 40 is arranged in the drying chamber 39 and is used for bearing the semi-finished wet balls, and the semi-finished wet balls which fall on the ground and are larger than 25mm are collected and conveyed to the gate valve 40 of the drying chamber 39 (also called as a vertical kiln) through a hot blast stove feed inlet 38; that is, the gate valve 40 carries the collected wet pellets of the semi-finished product to be dried from the screening in the screening apparatus.
When in use, the gas valve is opened, the gas is pushed by the blower 34, the gas enters the combustion chamber 35 through the gas pipeline 33 for combustion, and the generated hot air is blown into the drying chamber 39 through the hot air pipeline 37 under the action of the exhaust fan 36; the temperature of the hot air entering the drying chamber 39 is controlled at 260-300 ℃, the semi-finished product wet material blocks are dried in the drying chamber 39 for 120-150 minutes until the moisture of the semi-finished product wet material balls is reduced to be less than 2% (used for guaranteeing the strength of the finished product balls) to obtain the finished product balls, a chain plate machine 41 is arranged below the gate valve 40, one end of the gate valve 40 is opened, the finished product balls fall onto the chain plate machine 41, and the finished product balls are conveyed into a finished product warehouse through the chain plate machine 41, namely, the chain plate machine 41 is used for conveying the finished product balls falling from the gate valve 40 to the finished product warehouse; the temperature of the finished pellets exiting the drying chamber 39 exceeds 100 ℃. The finished product has uniform granularity, low moisture, less powder and high air permeability.
And (5) taking a proper amount of finished balls according to actual production requirements of the blast furnace, and conveying the balls to the blast furnace for direct use.
The method for pressing the ball by returning the ore from the blast furnace comprises the steps of mixing and stirring in the first step, pressing the ball for forming in the second step and drying in the third step; the specific steps are described in detail as follows:
firstly, mixing and stirring: before mixing and stirring, the raw materials in the embodiment comprise laterite nickel ore, blast furnace return ore and binder; the three raw materials are respectively stored in a first bin 1, a second bin 2 and a binder barrel 17; the raw materials are proportioned according to a certain mass ratio, specifically, the raw materials are proportioned as follows:
the content of the reference laterite nickel ore is 15%, the content of the blast furnace return ore is 81%, and the content of the binder is 4%; the proportion of ingredients is recommended proportion, and the final proportion can be adjusted according to the requirement. Wherein, the content range of laterite nickel ore is 8-15%, the content range of blast furnace return ore is 81-89%, and the content range of binder is 3-5%.
The laterite-nickel ore is dried until the moisture content is less than or equal to 16% before mixing, specifically, the laterite-nickel ore is dried in a rotary kiln (the outlet temperature of a hearth is 1050 ℃ and the rotating speed is 600 r/min) until the moisture content is less than or equal to 16%, and then is placed in a warehouse A area; placing the return ores of the blast furnace in a warehouse B area; taking a proper amount of dried laterite nickel ore, placing the laterite nickel ore into a first storage bin 1, and placing a proper amount of blast furnace return ore into a second storage bin 2 for standby; an adhesive charging basket 17 is arranged above the left side of the double horizontal shaft stirrer, and the adhesive is charged into the adhesive charging basket 17 through an adhesive charging opening 16 for standby.
Mixing and stirring: as shown in fig. 1, a first bin discharge hole is formed in the lower portion of a first bin 1, a first belt scale 4 is arranged below the first bin 1, 15% of dried laterite-nickel ore is weighed out through the first belt scale 4, a second bin 2 is identical to the first bin 1 in structure, namely, a second bin discharge hole is formed in the lower portion of the second bin 2, a second belt scale 8 is arranged below the second bin 2, 81% of blast furnace return ore is weighed out through the second belt scale 8, and the materials are respectively sent to a mixing bin 5 to be mixed to obtain mixed materials. The mixing silo 5 is arranged below the first belt conveyor scale 4, and the mixing silo 5 is also arranged below the second belt conveyor scale 8.
Wherein, the laterite nickel ore and the blast furnace return ore can generate dust in the process of being sent to the mixing bin 5, and a dust removal device is needed for dust removal. The dust removing device includes: the dust and ash collection device comprises a dust and ash collection bin 9, a dust remover 10, an induced draft fan 11 and a chimney 12.
The dust removing pipeline 3 is arranged above the first bin 1 and the second bin 2, and the dust enters the dust remover 10 through the dust removing pipeline 3 to remove dust, and the dust remover 10 is preferably a bag type dust remover; the dust bin 9 is arranged below the dust catcher 10, dust is deposited into the dust bin 9 after dust removal, a dust outlet is arranged at the lower part of the dust bin 9, a cart can be arranged below the dust outlet, and the dust in the dust bin 9 is transported out through the cart, and in a specific embodiment, the dust is transported to a dust warehouse. The flue gas generated by dust removal is discharged from a chimney 12 through a draught fan 11.
In a specific embodiment, a dust removing hood 7 is arranged above the mixing bin 5 and is used for removing dust, and the dust removing hood 7 is communicated with the dust removing pipeline 3, so that dust can enter the dust remover 10 through the dust removing pipeline 3.
The first conveyer belt 6 sets up in the below of mixing silo 5, and the lower part of mixing silo 5 is provided with the mixing silo discharge gate, carries to double-horizontal-shaft mixer feed inlet 13 through first conveyer belt 6 from the mixture of mixing silo 5, and double-horizontal-shaft mixer feed inlet 13 is located double-horizontal-shaft mixer's upper portion, and the mixture is carried in the first double-horizontal-shaft mixer stirring storehouse 14 through double-horizontal-shaft mixer feed inlet 13.
In one embodiment, as shown in FIG. 2, the rotational speed of the screw auger 18 is set to 50r/min, and the adhesive from the adhesive cartridge is delivered to the first twin horizontal axis mixer mixing bin 14 at a 4% ratio through the screw auger 18 for mixing.
In another specific embodiment, a third belt scale is arranged below the adhesive bucket 17, and a third belt conveyor is arranged below the third belt scale; the adhesive was weighed out by a third belt scale by 4% and transferred to a third belt conveyor, which then transferred the adhesive to the first twin-horizontal-shaft mixer hopper 14.
The stirring device comprises: a first double-horizontal-shaft stirrer and a second double-horizontal-shaft stirrer;
the first double horizontal shaft mixer includes: a double horizontal shaft mixer feed inlet 13 and a first double horizontal shaft mixer mixing bin discharge outlet 20;
the second double-horizontal-shaft mixer comprises: the second double horizontal shaft mixer mixes the storehouse discharge gate 22.
As shown in FIG. 2, the number of revolutions of the first twin horizontal mixer was set to 60r/min. The binder and the mixture were stirred for the first time in the first twin-horizontal-shaft stirrer stirring tank 14 for 3 minutes to obtain a first stirred material. The first double-horizontal-shaft stirrer stirring bin discharge port 20 is arranged at the lower part of the first double-horizontal-shaft stirrer stirring bin 14, the first stirring material is input into the second double-horizontal-shaft stirrer stirring bin 21 through the first double-horizontal-shaft stirrer stirring bin discharge port 20 for secondary stirring, the second double-horizontal-shaft stirrer stirring bin 21 is arranged below the first double-horizontal-shaft stirrer stirring bin 14, the revolution number of the second double-horizontal-shaft stirrer is set to 80r/min, and stirring is carried out for 3min, so that the second stirring material is obtained.
In a specific embodiment, the first double-horizontal-shaft stirrer stirring bin 14 is provided with a viewing window 15, and the viewing window 15 is made of transparent materials, such as glass, resin and the like, so that stirring conditions in the first double-horizontal-shaft stirrer stirring bin 14 can be seen through the viewing window 15.
In a specific embodiment, the outer side of the stirring bin 14 of the first double-horizontal-shaft stirrer is provided with an adhesive feeding platform 19, the bottom of the adhesive feeding platform 19 is higher than the discharge hole 20 of the stirring bin of the first double-horizontal-shaft stirrer, and the adhesive feeding platform 19 provides support for the adhesive bucket 17, that is, the adhesive bucket 17 can be arranged on the adhesive feeding platform 19.
The second double-horizontal-shaft stirrer stirring bin discharge hole 22 is formed in the lower portion of the second double-horizontal-shaft stirrer stirring bin 21, second stirring materials are conveyed to the first belt conveyor 23 through the second double-horizontal-shaft stirrer stirring bin discharge hole 22, and the first belt conveyor 23 is arranged below the second double-horizontal-shaft stirrer stirring bin 21.
And secondly, ball pressing and forming: as shown in fig. 3, the first belt conveyor 23 conveys the second stirring material to the feeding port 24 of the high-pressure ball press, the feeding port 24 of the high-pressure ball press is arranged at the upper part of the high-pressure ball press, and the second stirring material is conveyed to the position of the press roller 26 through the screw conveyor 25; the press roll 26 is provided at the lower part of the high-pressure ball press.
The diameter of the press roll 26 of the high-pressure ball press is set to 800mm, the roll width is set to 500mm, the maximum pressure among the rolls is set to 380t, the specific linear pressure is set to 8t/cm, and the press roll 26 presses the second stirring material into semi-finished wet balls with the specification of 50 x 40 x 25 mm.
The second conveyor belt 27 is disposed below the press roller 26, and the above-mentioned semi-finished wet balls are naturally conveyed onto the second conveyor belt 27 by their own weight.
Screening: as shown in fig. 4 and 5, the semi-finished wet pellets are transported to a screen 29 by a second conveyor belt 27 and a second belt conveyor 28; wherein, the inclination angle of the second belt conveyor 28 is controlled below 35 degrees, so as to ensure that the condition that the semi-finished wet balls roll out of the second belt conveyor 28 does not occur in the transportation process.
The screen 29 is used for screening the semi-finished wet pellets produced by the rolling device, removing waste materials with a size smaller than a set size, and conveying the screened semi-finished wet pellets to the drying device. Preferably, the screening size is set to be 25mm, the third conveyor belt 31 is arranged below the mineral screen 29, the screen plate 32 is arranged on the mineral screen 29, the semi-finished wet balls are screened by the screen plate 32 with the aperture of 25mm, the semi-finished wet balls smaller than 25mm fall onto the third conveyor belt 31 and are sent into the first double horizontal shaft stirrer stirring bin 14 again to be stirred, and the semi-finished wet balls larger than 25mm fall to the ground directly and are collected and sent into the drying chamber 39 to be dried.
In a specific embodiment, a material blocking screen 30 is arranged between the second belt conveyor 28 and the screen 29, and the material blocking screen 30 is in a vertical state and is located above the third conveyor belt 31 and is used for blocking semi-finished wet balls smaller than 25mm and preventing the semi-finished wet balls from splashing.
And step three, drying: as shown in fig. 6, semi-finished wet balls falling on the ground of more than 25mm are collected by a forklift; a gate valve 40 is arranged in the drying chamber 39 and is used for bearing the semi-finished wet balls, and the semi-finished wet balls which fall on the ground and are larger than 25mm are collected and conveyed to the gate valve 40 of the drying chamber 39 (also called as a vertical kiln) through a hot blast stove feed inlet 38; that is, the gate valve 40 carries the collected wet pellets of the semi-finished product to be dried after screening from the screening apparatus.
When in use, the gas valve is opened, the gas is pushed by the blower 34, the gas enters the combustion chamber 35 through the gas pipeline 33 for combustion, and the generated hot air is blown into the drying chamber 39 through the hot air pipeline 37 under the action of the exhaust fan 36; the temperature of the hot air entering the drying chamber 39 is controlled at 260-300 ℃, the semi-finished product wet material blocks are dried in the drying chamber 39 for 120-150 minutes until the moisture of the semi-finished product wet material balls is reduced to be less than 2% (used for guaranteeing the strength of the finished product balls) to obtain the finished product balls, a chain plate machine 41 is arranged below the gate valve 40, one end of the gate valve 40 is opened, the finished product balls fall onto the chain plate machine 41, and the finished product balls are conveyed into a finished product warehouse through the chain plate machine 41, namely, the chain plate machine 41 is used for conveying the finished product balls falling from the gate valve 40 to the finished product warehouse; the temperature of the finished pellets exiting the drying chamber 39 exceeds 100 ℃. The finished product has uniform granularity, low moisture, less powder and high air permeability.
And (5) taking a proper amount of finished balls according to actual production requirements of the blast furnace, and conveying the balls to the blast furnace for direct use.
In order to realize that the return ore ball pressing performance of the blast furnace meets the use requirement of blast furnace smelting, a raw material formula and a method suitable for the process are developed; adding laterite nickel ore as a bonding medium; the binding agent is added, so that the binding capability of the laterite-nickel ore is improved, and the balling rate of the blast furnace return ore is improved.
The method for pressing the return ores of the blast furnace does not have high-temperature treatment, and mainly screens the blast furnace to obtain the return ores with granularity smaller than 5mm, and directly presses the return ores into the blast furnace for use. According to the same calculation method, the energy consumption of the ton return ore pressing ball product is 10Kggce/t, compared with the energy consumption of the annual return ore sintering finished product, the annual return ore pressing ball finished product energy consumption is reduced by 80%, the sintering energy consumption is obviously reduced, the environmental pollution is reduced, excessive blast furnace return ore is prevented from being circularly re-burned in a sintering system, and meanwhile, the blast furnace return ore pressing ball can also replace part of sintered ore, so that the clinker ratio is improved, and the stable production of the blast furnace is facilitated.
It will be apparent to those skilled in the art that the present utility model may be practiced in other embodiments that depart from the spirit or essential characteristics thereof. It is apparent that the present utility model is not limited to the details of the above-described exemplary embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. All changes that come within the scope of the utility model or equivalents thereto are intended to be embraced therein.
Claims (10)
1. A blast furnace return ore pressing ball device, characterized by comprising:
the stirring device is used for stirring the blast furnace return ores, the laterite-nickel ores and the binder which are proportioned according to the set mass ratio;
the rolling device is used for rolling the stirred materials transferred from the stirring device through the transferring device so as to form semi-finished wet balls;
and the drying device is used for drying the semi-finished wet balls transferred from the rolling device through the transfer device to obtain finished balls.
2. The apparatus of claim 1, wherein the device comprises a plurality of sensors,
the stirring device comprises a mixing bin and a stirring bin, wherein:
the mixing bin comprises a first bin, a second bin and a mixing bin, wherein the first bin is used for containing laterite-nickel ore, the second bin is used for containing blast furnace return ore, and the mixing bin is used for mixing the laterite-nickel ore and the blast furnace return ore which are input according to a set mass ratio to obtain a mixture;
the stirring bin comprises a binder feeding device and a stirring bin, the binder feeding device comprises a binder barrel and a feeding device for providing binder for the stirring bin, and the binder barrel is used for containing the binder;
The stirring bin is used for providing a place for stirring laterite nickel ore, blast furnace return ore and binder which are proportioned according to a set mass ratio.
3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
the stirring bin comprises a first double-horizontal-shaft stirrer stirring bin and a second double-horizontal-shaft stirrer stirring bin;
the stirring device comprises a first double-horizontal-shaft stirrer and a second double-horizontal-shaft stirrer;
the first double-horizontal-shaft stirrer is arranged in a stirring bin of the first double-horizontal-shaft stirrer and is used for stirring the mixture and the adhesive which is put into the stirring bin according to a set mass ratio for the first time to obtain a first stirring material;
the second double-horizontal-shaft stirrer is arranged in the stirring bin of the second double-horizontal-shaft stirrer and is used for stirring the first stirring material for the second time to obtain a second stirring material serving as the material.
4. A device according to claim 3, wherein the supply means for supplying adhesive to the mixing silo comprises: a third belt scale and a third belt conveyor,
the third belt scale is arranged below the adhesive charging basket, and is used for weighing the adhesive of the adhesive charging basket and conveying the adhesive to the third belt conveyor;
The third belt conveyor is arranged below the third belt scale and is used for conveying the bonding agent from the third belt scale weighed according to the set mass ratio to the stirring bin of the first double-horizontal-shaft stirrer.
5. A device according to claim 3, further comprising screening means for screening the semi-finished wet pellets produced by the rolling means to screen out waste material of a size smaller than a set size, and conveying the screened semi-finished wet pellets to the drying means.
6. The apparatus of claim 5, wherein the device comprises a plurality of sensors,
the drying device comprises a drying chamber, a chain plate machine and a gate valve arranged in the drying chamber;
the gate valve is used for bearing wet balls of the semi-finished products to be dried after being screened by the screening device;
the drying chamber is used for providing a space for drying the semi-finished wet balls;
and a chain plate machine is arranged below the gate valve and used for conveying finished balls falling from the gate valve to a finished product warehouse.
7. The device of claim 5, wherein the transfer device comprises:
the first belt scale is arranged below the first bin and is used for weighing the laterite-nickel ore of the first bin and conveying the laterite-nickel ore to the mixing bin;
The second belt scale is arranged below the second bin and is used for weighing the blast furnace return ores of the second bin and conveying the blast furnace return ores to the mixing bin;
the first conveyor belt is arranged below the mixing bin and is used for conveying the mixture from the mixing bin to the first double-horizontal-shaft stirrer stirring bin;
the first belt conveyor is used for conveying the materials output by the stirring device to the rolling device;
the second conveyor belt is arranged below the rolling device and is used for conveying the semi-finished wet balls from the rolling device to a second belt conveyor;
a second belt conveyor for conveying the semi-finished wet pellets from the second conveyor belt to the screening device;
and the third conveyor belt is arranged below the screening device and is used for conveying the waste materials smaller than the set size from the screening device to the stirring bin of the first double-horizontal-shaft stirrer.
8. The device according to claim 2, comprising a dust removal device,
the dust removing device comprises a dust remover and is used for removing dust generated in the process of conveying the laterite nickel ore and the blast furnace return ore to the mixing bin.
9. The apparatus of claim 8, wherein the device comprises a plurality of sensors,
the dust remover is a bag type dust remover.
10. The apparatus of claim 3, wherein the device comprises a plurality of sensors,
the stirring bin of the first double-horizontal-shaft stirrer is provided with an observation window, and stirring conditions in the stirring bin of the first double-horizontal-shaft stirrer can be seen through the observation window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724517.XU CN219470139U (en) | 2023-04-04 | 2023-04-04 | Device for pressing ball of return ore of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320724517.XU CN219470139U (en) | 2023-04-04 | 2023-04-04 | Device for pressing ball of return ore of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219470139U true CN219470139U (en) | 2023-08-04 |
Family
ID=87466493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320724517.XU Active CN219470139U (en) | 2023-04-04 | 2023-04-04 | Device for pressing ball of return ore of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219470139U (en) |
-
2023
- 2023-04-04 CN CN202320724517.XU patent/CN219470139U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104109755B (en) | A kind of dedusting ash is colded pressing metal pelletizing production system and method | |
| CN101613800B (en) | Metallurgical composite pelletizing prepared through twice pelletizing method, as well as preparation method and application thereof | |
| CN102367499B (en) | Technology for producing cold-bonded pellets from dust collected by converter dry dedusting | |
| CN101554632B (en) | Harmless regeneration recycling method of trash fly ash by using blast furnace | |
| CN110835568B (en) | Preparation method of sludge derived fuel for hazardous waste disposal | |
| CN112280975A (en) | Method and device for pressing powder balls under screen of rotary hearth furnace | |
| CN111235385A (en) | Process and device for producing pellets by using dry dedusting ash | |
| CN216073964U (en) | Mixed pelletization system of sintering | |
| CN204022910U (en) | A kind of dedusting ash is colded pressing metal pelletizing production system | |
| KR100645082B1 (en) | A method synthesize again waste matters and using an aduit form device | |
| CN108411131B (en) | Manganese-silicon alloy production system and manganese-silicon alloy production process | |
| CN219470139U (en) | Device for pressing ball of return ore of blast furnace | |
| CN213596170U (en) | Production line for producing cement clinker by solid-waste blending | |
| CN109913642B (en) | Rotary hearth furnace raw material treatment system and process thereof | |
| CN111468268B (en) | Pellet composite ore grinding system and pellet composite ore grinding method | |
| CN202626235U (en) | Equipment for producing steel-making slag former by virtue of steel-making sludge | |
| CN107937731A (en) | A kind of lateritic nickel ore preprocess method and device | |
| CN101962717A (en) | Raw material treatment and pelletizing system process for rotary hearth furnace | |
| CN116287694A (en) | Device and method for pressing ball of return ore of blast furnace | |
| CN102719665B (en) | Process method for producing slag-forming agent for making steel by utilizing steel making sludge | |
| CN111961868A (en) | Digestion preparation method of converter waste sludge | |
| CN209923399U (en) | Rotary hearth furnace raw material processing system | |
| CN212476837U (en) | Equipment for preparing cold-cured ball by electric furnace ash | |
| CN203200320U (en) | Device for producing sludge balls by utilizing steelmaking sludge | |
| CN101492767B (en) | Multi-stage whole-granule processing method and equipment for direct reduction of greenball |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |