CN108796150B - Rotary granulating device for blast furnace slag - Google Patents
Rotary granulating device for blast furnace slag Download PDFInfo
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- CN108796150B CN108796150B CN201811034585.3A CN201811034585A CN108796150B CN 108796150 B CN108796150 B CN 108796150B CN 201811034585 A CN201811034585 A CN 201811034585A CN 108796150 B CN108796150 B CN 108796150B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a rotary granulating device for blast furnace slag, and belongs to the technical field of blast furnace slag utilization. The invention discloses a rotary granulating device for blast furnace slag, which comprises a slag loading unit, a granulating unit and a shell; the granulating unit is arranged in the shell and comprises a rotary slag disk and a cooling mechanism, a heating part is arranged on the rotary slag disk, and a slag particle spray head, a liquefaction spray head and an atomization spray head of the cooling mechanism are arranged on the circumferential side of the rotary slag disk; the slag loading unit comprises a slag pot and a slag discharging channel, the slag discharging channel is arranged at the bottom of the slag pot, and an outlet of the slag discharging channel is positioned above the rotary slag disc. The edge of rotatory slag pan can form the slag membrane, and the heater block heats the blast furnace slag of the edge of rotatory slag pan and keeps warm, makes the slag membrane maintain higher temperature, suppresses the slag membrane and forms, is favorable to reducing the granulation sediment granularity, realizes the utilization of blast furnace slag as a resource.
Description
Technical Field
The invention relates to the technical field of blast furnace slag utilization in the metallurgical industry, in particular to a rotary granulating device for blast furnace slag.
Background
Blast furnace slag is a byproduct generated in blast furnace iron making, after various raw fuels entering a furnace are smelted, in addition to the byproducts such as molten iron (steel-making pig iron or cast pig iron) and blast furnace gas, gangue in iron ore and ash and flux in the fuel are easy to form liquid slag in a high-temperature environment, the temperature of the liquid slag is 1350-1450 ℃ generally, and the liquid slag is discharged through a slag hole and an iron hole. At present, blast furnace slag is one of the most main wastes in the steel industry, 300-600 kg of blast furnace slag is generated when one ton of pig iron is produced, statistics shows that the yield of pig iron in China in 2017 is about 7.1 hundred million tons, the yield of blast furnace slag is about 2.1-4.3 hundred million tons, and the problem of efficient utilization of blast furnace slag resources is urgently solved. At present, the treatment method of blast furnace slag at home and abroad mainly adopts a water quenching method, and the obtained amorphous slag product can be used as a cement clinker substitute with high energy consumption, so that higher additional value and environmental benefit are obtained, but the treatment of the blast furnace slag by adopting the water quenching method and a centrifugal method generally has some problems, such as large granularity and low granulation efficiency of granulated slag, influences the granulation efficiency and resource recovery efficiency of the blast furnace slag, and simultaneously a large amount of waste heat of the blast furnace slag cannot be reasonably utilized.
Through retrieval, the name of the invention is: the liquid blast furnace slag granulation and multi-roller waste heat recovery system (application number: 201310656436.1, application date: 2013-12-6) comprises a primary vaporization roller granulation bin, a secondary vaporization roller storage bin, a tertiary roller cooler and a waste heat recovery system, wherein a feed inlet of the primary vaporization roller granulation bin is provided with a liquid slag launder and a granulator, and the primary vaporization roller granulation bin, the secondary vaporization roller storage bin and the tertiary roller cooler are connected in series; the primary vaporization roller granulation bin, the secondary vaporization roller storage bin and the tertiary roller cooler are all provided with steam water inlets and outlets; the waste heat recovery system comprises a water feeding pump, a deaerator and a steam drum which are communicated through a water conveying pipeline. The waste heat of the blast furnace slag can be utilized in a cascade mode to produce high-grade saturated steam, the utilization grade of the waste slag is improved through rapid cooling of the solid slag, and the continuous operation of the whole process is not affected by the intermittent period of the blast furnace. The disadvantages are that: in addition, the blast furnace slag with larger granularity is not beneficial to using the granulated slag as raw materials such as cement and the like, and has poorer performance.
Through retrieval, the name of the invention is: the application discloses a system for generating water vapor by using blast furnace slag, which comprises a buffer tank, a granulation tower and a heat exchange mechanism, wherein the buffer tank is connected with the granulation tower through a pipeline; the inlet of the buffer tank is used for receiving the slag discharged by the blast furnace, and the outlet end of the buffer tank is communicated with the slag inlet of the granulation tower; the granulation tower is provided with a granulation water inlet, a water vapor outlet and a slag outlet, the granulation water sprayed from the granulation water inlet carries out water quenching on the slag discharged from the slag inlet and generates water vapor, and the water vapor outlet is communicated with the heat exchange mechanism through a steam pipeline. The method for generating the water vapor by the blast furnace slag is implemented based on the system. The water vapor is used as a heat transfer carrier, so that the scaling and corrosion of impurities in the blast furnace slag flushing water to a heat exchanger and a pipeline are avoided; the buffer tank can solve the problem of unstable steam generation caused by discontinuous slag tapping of the blast furnace, so that slag flushing in the granulation tower is continuous, steam can be continuously generated in the granulation tower, and waste heat utilization of blast furnace slag is facilitated. But the disadvantages are that the slag directly enters the granulation tower through the buffer tank and then is cooled by water to become solid slag, and because the slag is directly cooled in the granulation tower, the granulated slag has larger granularity, poorer heat exchange effect and lower energy utilization rate, the larger granularity of the granulated slag is not beneficial to the use of the granulated slag for raw materials such as cement, and the performance is lower.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to solve the problems that the granularity of granulated slag produced by a centrifugal method in the prior art is larger and the granulating efficiency is low, and provides a device for rotary granulating blast furnace slag, which maintains the slag film in a liquid state by a heating part, prevents chilling to reduce the fluidity of the slag film, reduces the generation of the slag film and reduces the granularity of the granulated slag.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a rotary granulating device for blast furnace slag, which comprises a slag loading unit, a granulating unit and a shell; the granulating unit is arranged in the shell and comprises a rotary slag disk and a cooling mechanism, a heating part is arranged on the rotary slag disk, and a slag particle spray head, a liquefaction spray head and an atomization spray head of the cooling mechanism are arranged on the circumferential side of the rotary slag disk; foretell dress sediment unit includes the slag ladle and the passageway of slagging tap, and the passageway of slagging tap sets up in the bottom of slag ladle, and the export of the passageway of slagging tap is located the top of rotatory slag pan.
Preferably, the heating member is disposed in the edge region of the rotating slag disk.
Preferably, the upper surface of the rotary slag disk is provided with a slag flowing groove which is arc-shaped.
Preferably, the slag particle spray heads are arranged above the edge position of the rotary slag disk, and the liquefaction spray heads are uniformly arranged on the outer side of the circumference of the slag particle spray heads away from the rotary slag disk; the outer side of the circumference of the liquefaction spray head is uniformly provided with the atomization spray head.
Preferably, the width of the slag flowing groove gradually decreases outwards along the sectional line of the slag flowing groove of the rotary slag pan, and the depth of the slag flowing groove gradually increases outwards along the sectional line of the slag flowing groove of the rotary slag pan.
Preferably, the included angle between the spraying direction of the slag particle spray head and the horizontal direction is a, the value of a is 45-90 degrees, the included angle between the spraying direction of the liquefying spray head and the vertical direction is b, and the value of b is 60-85 degrees.
Preferably, the level of the slag particle spray head is higher than that of the atomizing spray head, and the level of the liquefying spray head is between the slag particle spray head and the atomizing spray head.
Preferably, the slag particle spray head is connected with the slag storage tank through a slag particle injection pump; the atomizing nozzle is connected with an atomizing pipe through a water mist blowing pump, and the atomizing pipe is connected with the second water storage tank through a first water pump; the atomizer is connected with the first water storage tank through a second water pump.
Preferably, a stirring component is arranged in the slag storage tank.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) the invention discloses a rotary granulating device for blast furnace slag, which comprises a slag loading unit, a granulating unit and a shell; the granulating unit is arranged in the shell and comprises a rotary slag disk and a cooling mechanism, a heating part is arranged on the rotary slag disk, and a slag particle spray head, a liquefaction spray head and an atomization spray head of the cooling mechanism are arranged on the circumferential side of the rotary slag disk; the slag loading unit comprises a slag pot and a slag discharging channel, the slag discharging channel is arranged at the bottom of the slag pot, and an outlet of the slag discharging channel is positioned above the rotary slag disc; blast furnace slag gradually separates from the rotary slag disc under the action of centrifugal force on the rotary slag disc rotating at high speed, a slag film is formed at the edge of the rotary slag disc, the blast furnace slag at the edge of the rotary slag disc is heated and insulated by the heating part, so that the slag film maintains higher temperature, the slag film has better fluidity, the slag film is reduced, the granularity of granulated slag is reduced, and then the slag liquid separated from the slag film forms granulated slag under the cooling action of the cooling mechanism;
(2) according to the device for rotary granulation of blast furnace slag, the heating component is arranged in the edge area of the rotary slag pan and is used for heating the edge area in a key manner, so that the fluidity of the blast furnace slag is ensured, a slag film formed in the edge area of the rotary slag pan is uniformly heated, and the formation of the slag film is reduced;
(3) according to the device for rotary granulation of blast furnace slag, the upper surface of the rotary slag tray is provided with the slag flowing groove, the slag flowing groove is arc-shaped, the arc bending direction faces the rotating direction of the rotary slag tray, the width of the slag flowing groove is gradually reduced outwards along the section line direction of the slag flowing groove of the rotary slag tray, and the depth of the slag flowing groove is gradually increased outwards along the section line direction of the slag flowing groove of the rotary slag tray; the blast furnace slag in the rotary slag pan can move along the slag flowing groove, and the width of the slag flowing groove is gradually reduced outwards along the sectional line direction of the slag flowing groove of the rotary slag pan, so that the contact surface of a slag film formed by the blast furnace slag from the edge of the rotary slag pan is reduced, and the blast furnace slag flowing out of the slag flowing groove can form a streamline with a certain width, so that the blast furnace slag can be more easily granulated into particles with smaller particle size;
(4) according to the rotary granulating device for blast furnace slag, the slag particle spray head is arranged above the edge position of the rotary slag pan, and the liquefaction spray heads are uniformly arranged on the outer side of the circumference of the slag particle spray head away from the rotary slag pan; the outer side of the circumference of the liquefaction spray head is uniformly provided with the atomization spray heads; the included angle between the spraying direction of the slag particle spray head and the horizontal direction is a, the value of a is 45-90 degrees, the included angle between the spraying direction of the liquefying spray head and the vertical direction is b, the value of b is 60-85 degrees, the horizontal height of the slag particle spray head is higher than that of the atomizing spray head, and the horizontal height of the liquefying spray head is between the slag particle spray head and the atomizing spray head; the liquefaction spray head sprays water flow in the direction along the movement track of the slag liquid, the cooling effect of the rear part of the movement direction of the slag liquid is enhanced, water mist is sprayed in the direction opposite to the movement track of the slag liquid, and the atomization spray head cools the front part along the movement direction of the slag liquid, so that the slag liquid is uniformly cooled at the front part and the rear part of the movement track, the cooling speed of the slag liquid is accelerated, and the granulation efficiency of blast furnace slag is improved;
(5) according to the device for rotating and granulating the blast furnace slag, the slag particle spray head is connected with the slag storage tank through the slag particle injection pump, and the stirring component is arranged in the slag storage tank and is used for stirring granulated slag in the slag storage tank to prevent the granulated slag from being deposited at the bottom of the slag storage tank; the atomizing nozzle is connected with an atomizing pipe through a water mist blowing pump, and the atomizing pipe is connected with a first water storage tank through a first water pump; the atomizing nozzle is connected with the second water storage tank through a second water pump; the granulated slag sprayed by the slag particle spray head can make the granulated slag with smaller particle size contact with the slag film to form granulated slag with larger particle size on the one hand, and can make the slag film broken on the other hand, thereby preventing the formed slag liquid particles from being too large and influencing the quality of the granulated slag.
Drawings
FIG. 1 is a schematic structural view of a rotary blast furnace slag granulating apparatus according to the present invention;
FIG. 2 is a sectional view of a rotary slag pan in the rotary granulating apparatus for blast furnace slag according to the present invention;
FIG. 3 is a top view of a rotating slag pan in a blast furnace slag rotating granulation apparatus of the present invention;
FIG. 4 is a sectional view along the section line of the slag runner of the invention;
fig. 5 is a structural diagram of the edge of a rotating slag pan in embodiment 3 of the present invention.
The reference numerals in the schematic drawings illustrate:
100. a slag loading unit; 110. a slag pot; 120. a slag discharge passage;
200. a granulation unit; 210. rotating the slag pan; 211. a heating member; 212. a slag flowing groove; 213. hatching the slag flowing groove; 214. a slag inlet side; 215. a circumferential side; 216. a convex surface; 217. a baffle plate;
220. a cooling mechanism; 221. a slag particle spray head; 222. a liquefaction nozzle; 223. an atomizing spray head; 224. a slag particle injection pump; 225. a slag storage tank; 226. a water mist injection pump; 227. an atomizing tube; 228. a first water pump; 229. a first water storage tank; 230. a second water pump; 231. a second water storage tank; 232. and a stirring member.
Detailed Description
The detailed description and exemplary embodiments of the invention will be better understood when read in conjunction with the appended drawings, where the elements and features of the invention are identified by reference numerals.
Example 1
Referring to fig. 1 to 4, the blast furnace slag rotary granulating apparatus of the present embodiment includes a slag charging unit 100, a granulating unit 200, and a housing 500; the granulating unit 200 is arranged inside the shell 500, the granulating unit 200 comprises a rotary slag disk 210 and a cooling mechanism 220, the rotary slag disk 210 is provided with a heating component 211, and a slag particle spray head 221, a liquefaction spray head 222 and an atomization spray head 223 of the cooling mechanism 220 are arranged on the circumferential edge of the rotary slag disk 210; the slag loading unit 100 includes a slag pot 110 and a slag discharging channel 120, wherein the slag discharging channel 120 is disposed at the bottom of the slag pot 110, and an outlet of the slag discharging channel 120 is located above the rotary slag plate 210.
Blast furnace slag conveyed from a blast furnace is stored in the slag pot 110 and flows into the rotary slag pan 210 through the slag discharging channel 120, wherein the upper surface of the rotary slag pan 210 is a concave inverted cone with the center, the cone angle of the inverted cone is c, the value range of c is 120-160 degrees, in the embodiment, c is 150 degrees, the concave inverted cone enables the rotary slag pan 210 to have a certain volume, and thus, the flowing blast furnace slag can be stored on the rotary slag pan 210 in a certain amount; meanwhile, the driving motor drives the rotating slag pan 210 to rotate at a high speed (not shown in the drawing), and the rotating slag pan 210 rotating at a high speed makes the blast furnace slag move to the edge of the rotating slag pan 210 under the action of centrifugal force. It is worth noting that when the blast furnace slag moves to the edge of the rotating slag pan 210, the blast furnace slag is easy to form a slag film at the edge of the rotating slag pan 210 due to the high viscosity coefficient of the blast furnace slag and the strong viscosity between the blast furnace slag and the rotating slag pan 210; and because the surface tension of the slag film is large, the slag film is not easy to break, so that the granularity of slag liquid formed by the slag film is large, the granularity of granulated slag formed by cooling the slag liquid is large, and the subsequent resource utilization of blast furnace slag is not facilitated.
It should be noted that the amount of slag film formed at the edge of the rotating slag pan 210 has a great influence on the size of the granulated slag particles; generally, the more slag films, the larger slag droplets generated during crushing, and the larger the particles of granulated slag formed after the slag droplets are cooled; on the contrary, the slag film is less, the slag drops formed after the slag film is crushed are smaller, and the granules of the granulated slag formed after the slag drops with small granules are cooled are smaller, so that the subsequent resource utilization of the blast furnace slag is facilitated.
In this embodiment, be provided with heating element 211 on the rotatory slag pan 210, heating element 211 is silicon molybdenum rod heating or electromagnetic heating, heats the heat preservation through heating element 211 to the blast furnace slag in the rotatory slag pan 210, improves the mobility of blast furnace slag, reduces its coefficient of viscosity, and then can reduce the viscosity between blast furnace slag and the rotatory slag pan 210, avoids forming too much slag film between blast furnace slag and the rotatory slag pan 210. It should be mentioned that, in this embodiment, the heating component 211 is disposed at the edge region of the rotating slag pan 210, and the heating component 211 heats and preserves the temperature of the blast furnace slag at the edge of the rotating slag pan 210, so as to heat the edge region in a focused manner, ensure the fluidity of the blast furnace slag at the edge region of the rotating slag pan 210, and uniformly heat the slag film at the edge region of the rotating slag pan 210.
In addition, the upper surface of the rotary slag pan 210 is provided with a slag flowing groove 212, the slag flowing groove 212 is arc-shaped, and the arc bending direction of the slag flowing groove 212 faces the rotating direction of the rotary slag pan 210; the width of the slag flowing groove 212 is gradually reduced from the slag inlet side 214 to the circumferential side 215, and the depth of the slag flowing groove 212 is gradually increased from the slag inlet side 214 to the circumferential side 215; blast furnace slag falls to the central part of the upper surface of the rotary slag pan 210 through the slag discharging channel 120, the blast furnace slag falling to the upper surface of the rotary slag pan 210 has certain fluidity, the width of the slag flowing groove 212 is gradually reduced from the slag inlet side 214 to the circumferential side 215, so that the blast furnace slag at the central part moves to the edge part of the rotary slag pan 210 through the flow guiding and gathering action of the slag flowing groove 212, a slag film with a large area is prevented from being formed at the edge part of the rotary slag pan 210 by the blast furnace slag, the blast furnace slag moves out from the slag flowing groove 212 in a long strip shape under the action of centrifugal force, and the blast furnace slag can be more easily granulated into particles with smaller particle size; in addition, the depth of the slag flowing groove 212 gradually increases from the slag inlet side 214 to the circumferential side 215, so that the flow guiding effect of the slag flowing groove 212 at the edge of the rotary slag disk 210 is enhanced, and the formation of a slag film is further limited.
Example 2
The basic contents of this embodiment are the same as embodiment 1, except that: the slag particle spray heads 221 are arranged above the edge of the rotary slag disk 210, in the embodiment, 16 slag particle spray heads 221 are arranged, and the slag particle spray heads 221 are uniformly distributed along the circumference above the edge of the rotary slag disk 210. Slag particle shower nozzle 221 passes through the gas in this embodiment to be the carrier, to the less graining sediment of rotatory slag pan 210 edge injection granularity, and the carrier that sprays the graining sediment also can be other fluids such as water, and its effect lies in: on one hand, the granulated slag with a certain kinetic energy and the blast furnace slag at the edge of the rotary slag disk 210 are impacted, fused and grown up by spraying the granulated slag with smaller granularity, so that the granulated slag which does not meet the resource utilization condition before is subjected to secondary production and utilization; on the other hand, the slag film is broken through the impact action of the granulated slag with smaller granularity and the gas-based carrier, and the formed slag liquid particles are prevented from being too large to influence the quality of the granulated slag. The slag particle spray heads 221 are uniformly provided with liquefaction spray heads 222 along the outer side of the circumference far away from the rotating slag disk 210, in the embodiment, the number of the liquefaction spray heads 222 is 16, the liquefaction spray heads 222 are uniformly distributed along the circumference, and the liquefaction spray heads 222 are used for cooling slag liquid falling from a slag film; the circumference outside of liquefaction shower nozzle 222 has evenly arranged atomizer 223, and the quantity of atomizer 223 of this embodiment is 16, and the shower nozzle direction of atomizer 223 sets up corresponding with liquefaction shower nozzle 222 towards rotatory slag pan 210, and this atomizer 223 is used for cooling the slag liquid that drops out from the slag film.
It is worth to be noted that an included angle between the spraying direction of the slag particle spray head 221 and the horizontal direction is a, a is 45-90 °, and the value of a mainly depends on the rotation speed of the rotary slag pan 210, the viscosity of the blast furnace slag, and the cone angle c of the rotary slag pan 210, in this embodiment, c is 150 °, a is 75 °, and when the rotation speed of the rotary slag pan 210 is higher, the viscosity of the blast furnace slag is lower, and the cone angle c of the rotary slag pan 210 is higher, the value of a is smaller, and vice versa, the value of a is larger; the function is as follows: a is properly selected to enhance the ejection of the slag particles from the nozzle 221The crushing effect of the coming granulated slag on the slag film in the edge area of the rotating slag disk 210 reduces the granularity of the slag liquid falling from the slag film; in addition, the included angle between the spraying direction of the liquefaction sprayer 222 and the vertical direction is b, the value of b is 60-85 degrees, the value of b mainly depends on the movement track of the slag liquid, b is 75 degrees in the embodiment, the larger the included angle between the movement track of the slag liquid and the horizontal direction is, the smaller the value of b is, otherwise, the larger the included angle is, the larger the value is, the effect is that: b is a proper value, so that the water flow sprayed by the liquefaction nozzle 222 can be better contacted with the moving slag liquid, and part of the slag liquid at the rear edge of the slag liquid is better cooled, wherein the rear edge of the slag liquid refers to the part of the slag liquid which is relatively behind in the movement process of the slag liquid. The slag particle spray head 221 has a horizontal height higher than that of the atomizing spray head 223, and the liquefaction spray head 222 has a horizontal height between the slag particle spray head 221 and the atomizing spray head 223, so as to make the atomizing spray head 223 spray atomized water or atomized water CaF2The powder mixture cools the front part of the slag liquid, and the front part of the slag liquid refers to the part of the slag liquid which is positioned at the front part in the movement process of the slag liquid. The working principle is as follows: the cooling speed of the front edge of the slag liquid is high, and the cooling speed of the rear edge of the slag liquid is low, so that the cooling speed of the slag liquid is not uniform, the formed glass is not uniform, and the quality of granulated slag is adversely affected; therefore, water flow is sprayed in the direction along the movement track of the slag liquid, the cooling effect of the rear edge of the slag liquid is enhanced, water mist is sprayed at the front edge of the slag liquid, the cooling strength of the front edge of the slag liquid is properly supplemented, the movement of the slag liquid is not influenced by the sprayed water mist, the front edge of the slag liquid and the rear edge of the slag liquid are uniformly cooled, the cooling speed of the slag liquid is accelerated, and the granulation rate of the blast furnace slag is improved.
The slag particle spray head 221 is connected with the slag storage tank 225 through the slag particle injection pump 224, a stirring component 232 is arranged in the slag storage tank, the stirring component 232 is used for stirring granulated slag in the slag storage tank 225 to prevent the granulated slag from depositing at the bottom of the slag storage tank, and slag particles stored in the slag storage tank 225 are sprayed to the edge of the rotary slag disk 210 through the slag particle spray head 221 to form a slag film under the action of the injection pump 224; the atomizing nozzle 223 is connected to an atomizing pipe 227 by a water mist blowing pump 226, the atomizing pipe 227 is connected to a first water storage tank 229 by a first water pump 228, and water stored in the first water storage tank 229 is stored in the first water storage tank 229The water is sprayed into the atomizing pipe 227 by the first water pump 228, a large amount of air flowing at high speed is sucked into the atomizing pipe 227 under the action of the water mist spraying pump 226, the air flowing at high speed generates impact action on water in the atomizing pipe 227 to atomize the water, and the atomized water is sprayed onto slag liquid through the water mist spraying pump 226 and the atomizing nozzle 223; the liquefaction spray head 222 is connected to a second water storage tank 231 through a second water pump 230, and the water or water and CaF stored in the second water storage tank 2312The powder mixture is sprayed onto the slag liquid by the second water pump 230 to cool the liquid droplets.
The using method of the blast furnace slag rotary granulating device comprises the following steps:
step 1: the blast furnace slag stored in the slag pot 110 flows into the rotary slag pan 210 through the slag discharging passage 120;
step 2: the rotating slag pan 210 rotates to enable blast furnace slag to flow towards the edge along the slag flowing groove 212 on the rotating slag pan 210 under the action of centrifugal force, the heating component 211 arranged on the rotating slag pan 210 is located at the edge position of the rotating slag pan 210, and the heating component 211 heats and preserves the temperature of the blast furnace slag at the edge position of the rotating slag pan 210 to inhibit the blast furnace slag from forming a slag film at the edge position of the rotating slag pan 210.
And step 3: the blast furnace slag forms a slag film at the edge of the rotary slag pan 210, the slag particle spray head 221 arranged above the edge of the rotary slag pan 210 sprays fine-grained slag to the slag film, the blast furnace slag forms slag liquid after separating from the rotary slag pan 210, the liquefaction spray head 222 of the cooling mechanism 220 sprays water flow to the slag liquid for cooling, the atomization spray head 223 sprays water mist to the slag liquid for cooling, and the slag liquid of the blast furnace slag is granulated in the forced cooling process.
Example 3
Referring to fig. 5, the basic contents of this embodiment are the same as embodiment 1, except that: a raised surface 216 is arranged between two adjacent slag flowing grooves 212, and baffles 217 are arranged at two ends of the circumferential edge position of the raised surface 216, so that the baffles 217 are positioned at two sides of a slag outlet of the slag flowing grooves 212, namely the circumferential side 215. The function is as follows: the blast furnace slag on the rotating slag pan 210 is transported to the edge of the rotating slag pan 210 by the centrifugal forceIn the embodiment, part of the blast furnace slag flows out through the slag hole along the slag groove 212, and in addition, part of the blast furnace slag flows on the convex surface 216 and further flows to the circumferential edge of the convex surface 216, when the part of the blast furnace slag moves to the circumferential edge position of the convex surface 216, the part of the blast furnace slag is blocked by the baffle plate 217, the blast furnace slag is inhibited from flowing out from the upper part of the slag hole of the slag groove 212, and the two parts of the blast furnace slag are prevented from mixing with each other to form a slag film, and in addition, the height of the baffle plate 217 close to the position corresponding to the slag hole of the1The height of the baffle 217 far away from the position corresponding to the slag outlet of the slag groove 212 is L2，L1＞L2Thereby reducing the mixing of the blast furnace slag at the circumferential edge of the raised surface 216 and the blast furnace slag in the slag runner 212 and improving the separation effect of the blast furnace slag and the slag runner.
The invention has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will, however, be understood that various modifications and changes may be made without departing from the scope of the invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative rather than restrictive, and any such modifications and variations are intended to be included within the scope of the present invention as described herein. Furthermore, the background is intended to be illustrative of the state of the art as developed and the meaning of the present technology and is not intended to limit the scope of the invention or the application and field of application of the invention.
Claims (8)
1. A device for rotary granulation of blast furnace slag is characterized in that: the slag granulation device comprises a slag loading unit (100) and a granulation unit (200), wherein the granulation unit (200) comprises a rotary slag disc (210) and a cooling mechanism (220), a heating part (211) is arranged on the rotary slag disc (210), and a slag particle spray head (221), a liquefaction spray head (222) and an atomization spray head (223) of the cooling mechanism (220) are arranged on the circumferential edge of the rotary slag disc (210); the slag loading unit (100) comprises a slag pot (110) and a slag discharging channel (120), wherein the slag discharging channel (120) is arranged at the bottom of the slag pot (110), and an outlet of the slag discharging channel (120) is positioned above the rotary slag disc (210); wherein, the heating member (211) is heated by a silicon-molybdenum rod or by electromagnetic heating, the heating member (211) is arranged at the edge of the rotary slag disk (210), and the heating temperature of the heating member (211) is 1250-1350 ℃.
2. The rotary blast furnace slag granulation apparatus as set forth in claim 1, wherein: the upper surface of the rotary slag tray (210) is provided with a slag flowing groove (212), and the slag flowing groove (212) is arc-shaped.
3. The rotary blast furnace slag granulation apparatus as set forth in claim 1, wherein: the slag particle spray head (221) is arranged above the edge position of the rotary slag disk (210), and the liquefaction spray heads (222) are uniformly arranged on the outer side of the circumference of the slag particle spray head (221) far away from the rotary slag disk (210); the circumference outside of the liquefaction spray head (222) is uniformly provided with the atomization spray heads (223).
4. The rotary blast furnace slag granulation apparatus as set forth in claim 1, wherein: the width of the slag flowing groove (212) is gradually reduced from the slag inlet side (214) to the circumferential side (215), and the depth of the slag flowing groove (212) is gradually increased from the slag inlet side (214) to the circumferential side (215).
5. The rotary blast furnace slag granulation apparatus as set forth in claim 3, wherein: the included angle between the spraying direction of the slag particle spray head (221) and the horizontal direction is a, the value of a is 45-90 degrees, the included angle between the spraying direction of the liquefaction spray head (222) and the vertical direction is b, and the value of b is 60-85 degrees.
6. The rotary blast furnace slag granulation apparatus as set forth in claim 3, wherein: the level of the slag particle spray head (221) is higher than that of the atomizing spray head (223), and the level of the liquefying spray head (222) is between the slag particle spray head (221) and the atomizing spray head (223).
7. The rotary blast furnace slag granulation apparatus as set forth in claim 3, wherein: the slag particle spray head (221) is connected with the slag storage tank (225) through a slag particle blowing pump (224); the atomizing nozzle (223) is connected with an atomizing pipe (227) through a water mist blowing pump (226), and the atomizing pipe (227) is connected with a first water storage tank (229) through a first water pump (228); the liquefaction spray head (222) is connected with a second water storage tank (231) through a second water pump (230).
8. The rotary blast furnace slag granulation apparatus as set forth in claim 7, wherein: a stirring component (232) is arranged in the slag storage tank (225).
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| CN201811034585.3A CN108796150B (en) | 2018-09-05 | 2018-09-05 | Rotary granulating device for blast furnace slag |
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| CN201811034585.3A CN108796150B (en) | 2018-09-05 | 2018-09-05 | Rotary granulating device for blast furnace slag |
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| CN108796150B true CN108796150B (en) | 2020-08-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203096086U (en) * | 2013-03-06 | 2013-07-31 | 圣火科技(河南)有限责任公司 | Rotary revolving cup for centrifuging and granulating slag of dry quenching slag device |
| CN103757155A (en) * | 2013-12-27 | 2014-04-30 | 河南圣石节能环保工程有限公司 | Coke dry quenching water mist granulation device |
| CN105722803A (en) * | 2014-06-03 | 2016-06-29 | 哈奇有限公司 | Process and apparatus for dry granulation of slag with reduced formation of slag wool |
| CN108193006A (en) * | 2018-01-13 | 2018-06-22 | 秦皇岛点知汇科技有限公司 | A kind of centrifugal slag granulation and residual neat recovering system |
| CN208733147U (en) * | 2018-09-05 | 2019-04-12 | 安徽工业大学 | A kind of device for blast furnace slag granulation processing |
-
2018
- 2018-09-05 CN CN201811034585.3A patent/CN108796150B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203096086U (en) * | 2013-03-06 | 2013-07-31 | 圣火科技(河南)有限责任公司 | Rotary revolving cup for centrifuging and granulating slag of dry quenching slag device |
| CN103757155A (en) * | 2013-12-27 | 2014-04-30 | 河南圣石节能环保工程有限公司 | Coke dry quenching water mist granulation device |
| CN105722803A (en) * | 2014-06-03 | 2016-06-29 | 哈奇有限公司 | Process and apparatus for dry granulation of slag with reduced formation of slag wool |
| CN108193006A (en) * | 2018-01-13 | 2018-06-22 | 秦皇岛点知汇科技有限公司 | A kind of centrifugal slag granulation and residual neat recovering system |
| CN208733147U (en) * | 2018-09-05 | 2019-04-12 | 安徽工业大学 | A kind of device for blast furnace slag granulation processing |
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Effective date of registration: 20210630 Address after: 225239 Industrial Park, Guocun Town, Jiangdu District, Yangzhou City, Jiangsu Province Patentee after: YANGZHOU XIONGLIAN METALLURGY TECHNOLOGY Co.,Ltd. Address before: 243002 59 Hudong Middle Road, Huashan District, Ma'anshan, Anhui Patentee before: ANHUI University OF TECHNOLOGY |