CN102690911B - Granulating device for blast-furnace slag - Google Patents
Granulating device for blast-furnace slag Download PDFInfo
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- CN102690911B CN102690911B CN201210175655.3A CN201210175655A CN102690911B CN 102690911 B CN102690911 B CN 102690911B CN 201210175655 A CN201210175655 A CN 201210175655A CN 102690911 B CN102690911 B CN 102690911B
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Abstract
The invention discloses a granulating device for a blast-furnace slag and belongs to an auxiliary device for treating the blast-furnace slag. The granulating device comprises a granulating cylinder body, a granulating assembly and a driving mechanism, wherein a plurality of centrally-divergently or mesh brackets are mounted at the bottom of the granulating cylinder body; the driving mechanism is mounted on the brackets at the bottom of the granulating cylinder body; the granulating assembly is fixed on the driving mechanism and is driven by the driving mechanism to rotate; and one or more spiral wind spray nozzles are also arranged in any position on the inner wall of the granulating cylinder body. The granulating device for the blast-furnace slag, which is provided by the invention, is simple in structure and wide in application range and is suitable for being used in various granulating and cooling devices.
Description
Technical field
The present invention relates to a kind of blast-furnace slag and process supplementary unit, in particular, the present invention relates generally to a kind of blast-furnace slag prilling granulator.
Background technology
China is that a world steel is smelted big country, within 2009, produces iron and steel total amount and surpasses and rank 14 national summations thereafter.Within 2011, China's pig iron output is 6.3 hundred million tons, and wherein blast furnace slag is the main byproduct of iron-making production, and 1 ton of pig iron of every production is wanted the blast furnace slag of 0.3～0.6 ton of left and right of by-product.Even if press 0.35t slag/t iron, calculate, the quantum of output of blast furnace slag is 2.14 hundred million tons, and outflow temperature, 1450 ℃ of left and right, causes the heat waste of 5,000 ten thousand tons of standard coal left and right and the sulfide staining thing of 1,000,000 tons every year.Liquid blast-furnace slag belongs to higher-grade residual heat resources, has very high utility value.Blast furnace slag is a kind of silicate material, could generate the activity glass state blast furnace slag with potential using value after quenching, can be used as the raw material of production cement, mineral wool, sewage disposal sorbent material and high added value ceramic product etc., and market potential is huge.Blast furnace slag adopts Water Quenching technique mostly at present, and existing water quenching technique has Yin Bafa, figure daraf(reciprocal of farad), slag bath filtration method, Lhasa method and Ming Tekefa etc.Although water quenching can obtain the high added value slag particle of 90% above glass rate, yet it exists the higher-grade sensible heat in blast furnace slag not to be recycled, and water consumption is high, slag neutral and alkali composition stripping polluted water, discharge H
2the obnoxious flavour such as S and SOx, shrend is explosive, slag particle is dry needs lot of energy, system power consumption and maintenance workload large.Therefore blast furnace slag granulation and efficient higher-grade sensible heat recovery are the focus of present steel industry Sustainable development letter technical bottleneck ，Ye Shi China energy-saving and emission-reduction to be broken through.Some problems in view of water quenching technology existence; 20 century 70s rise; major industrial country has carried out the research of iron and steel melting slag granulation and sensible heat recovery technology in succession; wherein so that Japanese progress is the fastest, method is maximum, mainly comprises wind crush method, drum process, rotating cup shotting, chemical shotting etc.
Mitsubishi in 1977 and NKK develop jointly out wind crush method granulation blast furnace slag cement sensible heat recovery system, and at Fushan iron processed, have built up first set bessemer furnace slag wind granulation heat reclamation device in the world in 1981, and its heat recovery rate can reach 40-45%.Within 1988, horse base steel is in same wind granulation principle; first obtained at home " Wind power granulating device for steel dross " patent (publication number: CN88211276U); and on Ma Gang, Cheng Gang, Shi Gang and other places, application apparatus has been installed; yet be regrettably only conceived to granulating steel slag, do not carry out sensible heat recovery.China has also obtained patent of invention as " method and apparatus of a kind of blast furnace slag quench and waste heat recovery " (patent publication No.: CN101550460A) based on the practical experience of fluidized-bed for many years.On the whole, there is the shortcomings such as floor space is large, required air quantity large and gas blower energy consumption is high, technical stability is not enough, cost of investment is high, finished product slag particle footpath is grown (< 5mm partly accounts for more than 95%), cooling time greatly in wind crush method.Late 1970s, SUMITOMO CHEMICAL metal and Ishikawa island are broadcast mill (IHI) company and have been developed jointly swing roller slag granulating technique, and slag is freely dripped and impinges upon cylinder surface and be thrown out of granulation.That this technique has is energy-conservation, the distance of splashing is short, is easy to prey on the advantages such as slag particle and heat recuperation, but exists top coat to select the shortcomings such as more difficult, media particle and high temperature slag particle separation difficulty and heat recuperation rate are low.
NKK company based on slag the drum surface of two reverse rotations by the thermal medium of rotating cylinder internal recycling the cooling principle that reclaims sensible heat developed two in cold rotating cylinder granulation energy recovery technology; it has the advantages such as fast, the heat recovery rate efficiency high (reaching 77%) of conducting heat, but the method exists thin slag sheet to be bonded on rotary drum, need with rake scrape, the shortcoming such as inefficiency.Shanghai Baosteel has been introduced drum process slag treatment technology from Russia; and a large amount of technological improvements (patent publication No. CN1257932A, CN1318648A, CNIO1503281A, CN2795218Y, CN200981871Y, CN201158661Y, CN201232063Y, CN2795218Y) have been carried out; developed Novel rotary drum method granulating steel slag treatment unit, had that flow process is short, cost is low, energy-conserving and environment-protective, many-sided advantage such as safe and reliable.
But in above-mentioned Treating Methods for BF Slag, the heat that enriches that blast furnace slag is contained is not also fully used, also the report that there is no entity device industrial applications, mature industry utilisation technology does not form, the main difficulty existing has: the speed of cooling of (1) molten blast furnace slag requires high, and its speed of cooling requires to be greater than 10 ℃/s; (2) high furnace slag discharge has intermittence, and residual neat recovering system requires heat exchange to have continuity; (3) blast furnace slag easily forms secondary caking phenomenon in process of cooling; (4) there is secondary pollution (as dust pollution, groundwater pollution etc.) etc. in scheme device.Therefore, studying granulation and the sensible heat recovery novel process that a kind of granulation is effective, speed of cooling is fast and be very important, is also the precondition that realizes sensible heat high efficiente callback and short flow process high added value slag process for manufacturing product.
Summary of the invention
One of object of the present invention is to solve above-mentioned deficiency, and a kind of blast-furnace slag prilling granulator is provided, and while carrying out slag making to expect to solve in prior art, easily splashes, and forms the technical problems such as secondary caking after slag making due to bonding.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
Provided by the present invention is a kind of blast-furnace slag prilling granulator, comprise granulation cylindrical shell, granulation assembly and transmission rig, the bottom of described granulation cylindrical shell is provided with a plurality of center divergent shape or netted supports of being, transmission rig is arranged on the support of granulation cylinder body bottom, and granulation assembly is fixed on transmission rig, by transmission rig, drive granulation assembly to rotate, on the inwall any part of described granulation cylindrical shell, be also provided with one or more spiral wind nozzles.
Further technical scheme is: described granulation assembly comprises that granulation disc and granulation support granulation disc are fixed on granulation support, and below granulation support, center is provided with an extension, by this extension, is connected with transmission rig.
Further technical scheme is: described granulation disc is the structure formation of central concave, and its top is provided with many equally distributed deep-slotted chip breakers.
Further technical scheme is: described granulation disc bottom arranges one or more grooves, and its bottom is also provided with at least two female blind holes of tool.
Further technical scheme is: on described granulation support, be provided with the screw corresponding with granulation disc bottom blind hole, and its top is also provided with the projection that the groove with granulation disc bottom matches; Between described granulation support and granulation disc, by two bolts, interconnect.
Further technical scheme is: the extension of described granulation support below is connected with transmission rig by shaft coupling.
Further technical scheme is: described transmission rig is also provided with the cooling or water-chilling plant of wind.
Further technical scheme is: between the internal layer of described granulation cylindrical shell and skin, retaining cavity is set.
Further technical scheme is: described spiral wind nozzle accesses pneumatic plant by compressed air line.
Compared with prior art, one of beneficial effect of the present invention is: by the improvement to granulation disc structure, blast-furnace slag is cushioned after entering into prilling granulator, prevent that it from splashing everywhere, simultaneously under the equally distributed arc groove effect in granulation disc top, making granulation disc rotate the slag particle of producing disperses to its surrounding uniformly at prilling granulator, realize being uniformly distributed of slag particle, under the spiral wind effect simultaneously forming in granulation cylindrical shell at cooling effect and the spiral wind nozzle of granulation inner barrel retaining cavity, prevent that the slag particle that blast-furnace slag forms from boning on the inwall of granulation cylindrical shell, make slag particle can directly enter into subsequent processing, simultaneously provided by the utility model a kind of simple in structure, be applicable to use in various granulation refrigerating units, range of application is wide.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of granulation assembly and transmission mechanism in an embodiment of the present invention;
Fig. 3 is the structural representation of granulation disc and granulation support in the another kind of embodiment of the present invention.
In figure, 1 is granulation cylindrical shell, and 2 is transmission rig, and 3 is support, and 4 is spiral wind nozzle, and 5 is granulation assembly, 51 is granulation disc, and 52 is granulation support, and 53 is extension, and 54 is deep-slotted chip breaker, and 55 is blind hole, 56 is groove, and 57 is projection, and 58 is screw, and 6 is compressed air line, and 7 is retaining cavity.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
Fig. 1 shows one-piece construction schematic diagram of the present invention, as shown in Figure 1, a kind of blast-furnace slag prilling granulator provided by the present invention, comprise granulation cylindrical shell 1, granulation assembly 5 and transmission rig 2, the bottom of described granulation cylindrical shell 1 is provided with a plurality of center divergent shape or netted supports 3 of being, transmission rig 2 is arranged on the support 3 of granulation cylindrical shell 1 bottom, and granulation assembly 5 is fixed on transmission rig 2, by transmission rig 2, drive granulation assembly 5 to rotate, on the inwall any part of described granulation cylindrical shell 1, be also provided with one or more spiral wind nozzles 4.Aforesaid technical scheme is the basic embodiment that the present invention solves ended questions; rely on spiral wind nozzle 4 at the inner spiral air flow forming of granulation cylindrical shell 1; can prevent from being splashed by the blast-furnace slag after granulation; and when granulation blast-furnace slag is followed flow spiral rotation; reduce its temperature; prevent that it from secondary caking occurring, and makes the blast-furnace slag after granulation more easily carry out subsequent disposal.And the quantity of aforesaid spiral wind nozzle 4 adopts 6 to 8 for well, and with identical angle, be distributed on the inwall of granulation cylindrical shell 1, certainly aforesaid is only a kind of preferred technical scheme, relevant for the quantity of the spiral wind nozzle 4 of mentioning in the present embodiment, should determine with the concrete internal capacity of granulation cylindrical shell 1; Aforesaid spiral wind nozzle 4 is for guaranteeing the convenience of its access pneumatic plant, preferably between the inwall of granulation cylindrical shell 1 and outer wall, compressed air line 6 is set again, a plurality of spiral wind nozzles 4 are all accessed to compressed air line 6, and compressed air line 6 is led to outside granulation cylindrical shell 1, by the other end access pneumatic plant of compressed air line 6, by pneumatic plant, provide high pressure draft by 4 ejections of spiral wind nozzle.
Fig. 2 shows the structural representation that adopts granulation assembly 5 and transmission mechanism 2 in the present invention, shown in figure 2, the present invention is on the basis of above-mentioned basic embodiment, also the granulation assembly 5 adopting in this embodiment is improved, be specially this granulation assembly 5 is set to granulation disc 51 and granulation support 52, granulation disc 51 is fixed on granulation support 52, and granulation support 52 centers, below are provided with an extension 53, by this extension 53, is connected with transmission rig 2.
Shown in Figure 3, for the efficiency that further promotes granulation with blast-furnace slag is necessarily cushioned after contacting with granulation assembly 5, preferably the top of granulation disc 51 is set to the structure formation of central concave, and its top arranges many equally distributed deep-slotted chip breakers 54, this deep-slotted chip breaker 54 can make the blast-furnace slag dropping on granulation disc 51 be scattered to granulation cylindrical shell 1 by the path of appointment, be unlikely to splash, deep-slotted chip breaker 54 is conducive to promote the speed of granulation disc 51 granulations more simultaneously, while making blast-furnace slag throw away granulation disc 51 disk body, according to the track of deep-slotted chip breaker 54, along main shaft spiral, decline, so not only can alleviate the high temperature slag particle that the throws away shock to granulation cylindrical shell 1 inwall, can also reduce the sinking speed of slag particle, be conducive to the abundant exchange of heat, improve heat exchange efficiency.Texture improvement by aforesaid granulation assembly 5 combines with the spiral wind nozzle 4 in above-mentioned basic embodiment, can prevent to greatest extent splashing after blast-furnace slag granulation, the heat exchange efficiency of granulation is simultaneously higher, the basic embodiment that the technique means of this structure is above-mentioned with the present invention combines, and can form another preferred embodiment of the present invention.
On the basis of two above-mentioned embodiment of the present invention, for making granulation assembly 5, more easily install, also to granulation disc 51, the fit structure between granulation support 52 improves contriver, and this improvement still can combine with the above embodiments, form one or more embodiment that are more preferably, concrete improvement means comprise two aspects, and on the one hand for granulation disc 51 bottoms are arranged to one or more grooves 56, and its bottom is also provided with at least two female blind holes 55 of tool; And on the other hand, granulation support 52 is and aforesaid granulation disc 51 respective outer side edges, is provided with the screw 58 corresponding with granulation disc 51 bottom blind holes 55 on granulation support 52, and its top is also provided with the projection 57 that the groove 56 with granulation disc 51 bottoms matches; The object of groove 56 and projection 57 is set for making granulation support 52 more easily drive granulation disc 51 to rotate, to prevent skid, between described granulation support 52 and granulation disc 51, by two bolts, interconnect, the object being bolted is changed for convenience, because granulation disc 51 is consumable product, in its damage or wear and tear and unclamp bolt when more and can change.
And be connected and fixed about the transmission rig 2 of mentioning in above-described embodiment can adopt the extension 53 of shaft coupling and granulation support 52 belows, the clutch end of transmission rig 2 drives extension 53 to drive, and then drive granulation support 52 and granulation disc 51 to rotate, the centrifugal force that granulation disc 51 produces by its rotation just blast-furnace slag throws away, present the blast-furnace slag of semi-fluid shape under cooling and capillary effect, solidify the slag particle that forms 2 to 3 millimeters.
Simultaneously for guaranteeing that transmission rig 2 is in specified temperature range running, refrigerating unit is preferably installed above it again, refrigerating unit can be according to the different sorts of transmission rig 2, select air-cooling device or water-chilling plant, and transmission rig 2 can adopt electric motor, petrol motor or diesel engine and other power set that can drive granulation assembly 5 to rotate.
The granulation cylindrical shell 1 of mentioning in the above embodiments of the present invention, for further promoting the cooling efficiency of blast-furnace slag after 5 granulations of granulation assembly, can also between the internal layer of granulation cylindrical shell 1 and skin, retaining cavity 7 be set, retaining cavity 7 can be drawn by pipeline, by the water coolant in the replaceable retaining cavity 7 of pipeline, granulation cylindrical shell 1 is guaranteed all the time in a relatively low temperature range, guarantee the cooling performance after blast-furnace slag granulation, and the inside that makes granulation cylindrical shell 1 there will not be the too high situation of local temperature, be conducive to extend the work-ing life of granulation cylindrical shell 1.
" embodiment " that spoken of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the feature in conjunction with this embodiment, described and be included at least one embodiment that the application's generality describes.In specification sheets, a plurality of local appearance statement of the same race is not necessarily to refer to same embodiment.Furthermore, while describing a specific features, structure or feature in conjunction with arbitrary embodiment, what advocate is in conjunction with other embodiment, to realize this feature, structure or feature also to fall within the scope of the invention.
Although with reference to a plurality of explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and embodiments, and these are revised and within embodiment will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to the building block of subject combination layout and/or layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (7)
1. a blast-furnace slag prilling granulator, comprise granulation cylindrical shell (1), granulation assembly (5) and transmission rig (2), it is characterized in that: the bottom of described granulation cylindrical shell (1) is provided with a plurality of center divergent shape or netted supports (3) of being, transmission rig (2) is arranged on the support (3) of granulation cylindrical shell (1) bottom, and granulation assembly (5) is fixed on transmission rig (2), by transmission rig (2), drive granulation assembly (5) to rotate, on the inwall any part of described granulation cylindrical shell (1), be also provided with one or more spiral wind nozzles (4), described granulation assembly (5) comprises granulation disc (51) and granulation support (52), granulation disc (51) is fixed on granulation support (52), described granulation disc (51) is the structure formation of central concave, and its top is provided with many equally distributed deep-slotted chip breakers (54), for the blast-furnace slag that makes to drop on granulation disc (51), by the path of deep-slotted chip breaker (54) appointment, be scattered to granulation cylindrical shell (1), between the internal layer of described granulation cylindrical shell (1) and skin, be provided with retaining cavity (7).
2. blast-furnace slag prilling granulator according to claim 1, is characterized in that: described center, granulation support (52) below is provided with an extension (53), by this extension (53), is connected with transmission rig (2).
3. blast-furnace slag prilling granulator according to claim 1 and 2, it is characterized in that: described granulation disc (51) bottom arranges one or more grooves (56), and its bottom is also provided with at least two female blind holes of tool (55).
4. blast-furnace slag prilling granulator according to claim 3, it is characterized in that: on described granulation support (52), be provided with the screw (58) corresponding with granulation disc (51) bottom blind hole (55), and its top is also provided with the projection (57) that the groove (56) with granulation disc (51) bottom matches; Between described granulation support (52) and granulation disc (51), by two bolts, interconnect.
5. blast-furnace slag prilling granulator according to claim 2, is characterized in that: the extension (53) of described granulation support (52) below is connected with transmission rig (2) by shaft coupling.
6. blast-furnace slag prilling granulator according to claim 1 and 2, is characterized in that: described transmission rig (2) is also provided with the cooling or water-chilling plant of wind.
7. blast-furnace slag prilling granulator according to claim 1, is characterized in that: described spiral wind nozzle (4) is by compressed air line (6) access pneumatic plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210175655.3A CN102690911B (en) | 2012-05-31 | 2012-05-31 | Granulating device for blast-furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210175655.3A CN102690911B (en) | 2012-05-31 | 2012-05-31 | Granulating device for blast-furnace slag |
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| Publication Number | Publication Date |
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| CN102690911A CN102690911A (en) | 2012-09-26 |
| CN102690911B true CN102690911B (en) | 2014-01-22 |
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| CN201210175655.3A Active CN102690911B (en) | 2012-05-31 | 2012-05-31 | Granulating device for blast-furnace slag |
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Families Citing this family (1)
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| CN108660269A (en) * | 2018-07-17 | 2018-10-16 | 中能立化科技有限公司 | A kind of jet stream granulation spray gun and slag granulating heat-exchanger rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5268896A (en) * | 1975-12-06 | 1977-06-08 | Mitsubishi Heavy Ind Ltd | Method for treatment of slag |
| GB2148330B (en) * | 1983-10-24 | 1987-05-07 | British Steel Corp | Improvements in or relating to the granulation of slag |
| CN201147731Y (en) * | 2007-10-25 | 2008-11-12 | 金川集团有限公司 | Spray nozzle for metallurgical slag granulation |
| CN202658167U (en) * | 2012-05-31 | 2013-01-09 | 四川川润股份有限公司 | Granulating device for blast furnace slag |
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Application publication date: 20120926 Assignee: Sichuan CRUN Power Equipment Co., Ltd. Assignor: Sichuan Chuanrun Co., Ltd. Contract record no.: 2016510000014 Denomination of invention: Granulating device for blast-furnace slag Granted publication date: 20140122 License type: Exclusive License Record date: 20160805 |
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