A dynamic dehydration device and method for finished slag

Abstract

The present invention discloses a dynamic dehydration device and method for finished slag, and relates to the field of metallurgical processing technology. In the present invention: a filtering area located in the area above the filtrate bottom plate is provided on one side of the material separator, and a material grabbing area located in the area above the filtrate bottom plate is provided on the other side. The downstream of the drying air inlet chamber is connected to the air supply chamber, and the air supply chamber is equipped with an outlet fan. The liquid heat absorption box is connected to a liquid outlet pipe and a liquid return pipe, and the liquid outlet pipe is equipped with a power pump and a detour pipe located in the filtering area. An interlayer heat conduction plate is fixedly arranged on the side of the material separator facing the material grabbing area, and a slow flow pipe connected to the liquid outlet pipe and the liquid return pipe is arranged inside the interlayer heat conduction plate. A temperature sensor is built into the interlayer heat conduction plate, and the interlayer heat conduction plate includes an upper guide inclined surface and a lower guide inclined surface facing the spiral blade. A heating area is formed above the interlayer heat conduction plate, and a ventilation area is formed in the vertical area of ​​the material grabbing area not blocked by the interlayer heat conduction plate. The present invention realizes efficient and energy-saving dehydration and dehumidification of the hedging slag.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical processing, and in particular to a device and method for dynamic dehydration of finished slag products. Background Art

[0002] After the blast furnace ironmaking is completed, the blast furnace slag is generally treated by cold water slag flushing. After slag flushing, in order to recover the slag, the slag needs to be dehydrated and dehumidified. The humidity in the slag flushing area is relatively high, and the interference degree of monitoring the dryness of the slag through the humidity sensor is relatively large. Moreover, the monitoring of the larger slag area for dehydration and dehumidification by a single-position point humidity sensor obviously cannot take into account the accurate humidity information of the slag in many positions. In addition, the main purpose of dehydrating and dehumidifying the slag is to separate the slag from the flowing water, and then remove the moisture attached to the slag. The removal of moisture is most directly affected by gas flow and temperature. Of course, in the existing technical means, a high energy consumption method can be directly provided to provide high temperature to heat the slag, but it undoubtedly increases the equipment cost and energy consumption cost to a large extent. If the combustion fuel method is used to provide heat, an additional tail gas treatment link is required. Therefore, how to dehydrate and dehumidify the slag in an efficient and energy-saving manner by controlling the airflow and temperature factors in the surrounding environment of the slag has become a problem that needs to be paid attention to and solved in the subsequent process of blast furnace slag flushing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device and method for dynamic dehydration of finished slag products, so as to dehydrate and dehumidify the slag materials in an efficient and energy-saving manner during the subsequent process of blast furnace slag flushing.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention provides a dynamic dehydration device for finished slag: a slag pool is arranged at the downstream end of the slag flushing channel of the blast furnace slag discharge, a material partition plate and a filtrate bottom plate located below the material partition plate are fixedly arranged in the slag pool, a filtering area located above the filtrate bottom plate is arranged on one side of the material partition plate, and a material grabbing area located above the filtrate bottom plate is arranged on the other side, a material climbing port connecting the filtering area and the material grabbing area is arranged at the bottom of the material partition plate, a first position sensor for sensing and monitoring the height of the slag flushing material in the filtering area is arranged on the side of the material partition plate facing the filtering area, and a second position sensor for sensing and monitoring the height of the slag flushing material in the material grabbing area is arranged on the side of the material partition plate facing the material grabbing area. Spiral blades are installed at the bottom of the filtering area, the material climbing port, and the bottom of the material grabbing area, and the spiral blades are arranged obliquely upward along the filtering area, the material climbing port, and the material grabbing area. A servo motor for driving the spiral blades to rotate is arranged at the periphery of the slag pool, and a liquid discharge area is arranged below the filtrate bottom plate. The periphery of the slag pool is provided with a dry air inlet chamber connected to the outside air environment and an air supply chamber connected to the liquid discharge area. The downstream of the dry air inlet chamber is connected to the air supply chamber, and the air supply chamber is provided with an exhaust fan. The periphery of the blast furnace is provided with a liquid heat absorption box for absorbing the heat dissipated by the blast furnace. The liquid heat absorption box is connected to a liquid outlet pipe and a liquid return pipe. The liquid outlet pipe is provided with a power pump and a detour pipe located in the filter area. An interlayer heat conduction plate is fixedly provided on the side of the partition plate facing the material grabbing area. The interlayer heat conduction plate is located above the material climbing port. A slow flow pipe connected to the liquid outlet pipe and the liquid return pipe is provided inside the interlayer heat conduction plate. The interlayer heat conduction plate is provided with a built-in temperature sensor. The interlayer heat conduction plate includes an upper guide inclined surface and a lower guide inclined surface facing the spiral blade. A heating zone is formed above the interlayer heat conduction plate, and a ventilation zone is formed in the vertical area of ​​the material grabbing area not blocked by the interlayer heat conduction plate.

[0006] As a preferred technical solution of the device of the present invention: a scraping mechanism is arranged on the upper side of the bottom plate of the drainage area, and a drainage bottom pipe is arranged at the lowest point of the drainage area.

[0007] As a preferred technical solution of the device of the present invention: a spare chamber connected to the drainage area is arranged at the periphery of the slag pool, the spare chamber is located below the air supply chamber, and the spare chamber is equipped with a spare pipe.

[0008] As a preferred technical solution of the device of the present invention: the liquid flow cross-sectional area of ​​the slow flow pipe is larger than the liquid flow cross-sectional area of ​​the liquid outlet pipe and the liquid return pipe.

[0009] As a preferred technical solution of the device of the present invention: the filtrate bottom plate is inclined, the inclination angle of the filtrate bottom plate is the same as the inclination angle of the spiral blade, and the air outlet of the air supply chamber faces the structural area of ​​the filtrate bottom plate directly below the material grabbing area.

[0010] The present invention provides a method for dynamic dehydration of finished slag, which includes the following steps:

[0011] Step 1: Slag spiral advancement in the filtration area

[0012] When the slag in the blast furnace is flushed through the slag flushing channel, the flushed slag enters the filtering area of ​​the slag pool. The first position sensor measures the slag accumulation height h in the filtering area. 1 Monitor. The slag in the filtration area has been standing for t 1 After that, the servo motor starts to drive the spiral blade to rotate, pushing the slag at the bottom of the filtration area toward the bottom of the grabbing area, where f(t 1 )∝f(h 1 ). The power pump starts, and the liquid heat absorber transfers the heat to the interlayer heat conduction plate.

[0013] Step 2: Ventilation and heating control of slag in the grabbing area

[0014] ① After the slag at the bottom of the filtration area enters the grabbing area, the slag begins to accumulate and rise along the upper guide slope.

[0015] ② When the second position sensor senses the slag in the ventilation area, the gas drying equipment in the dry air inlet chamber and the air outlet fan in the air supply chamber are started. a The second position sensor senses that the accumulation height of slag in the grabbing area changes to Δh. a , Δh a =h a1 -h a2 ,h a1 The unit time domain is T a Slag height at the time starting point, h a2 The unit time domain is T a The slag height at the end of the time.

[0016] Assume that the real-time power of the fan in the next unit time domain is p, if Δh a > 0, then f(p)∝[f 1 (h a1 ), f(Δh a )].

[0017] in, T n1 =n 1 ·T a , T max1 =m 1 ·T a , T n1 is the height h a1 The total ventilation time of the accumulated slag, T max1 That is, height h a1 Maximum ventilation time required for accumulated slag, m 1 >n 1 .

[0018] ③ Let the temperature sensed by the temperature sensor be w, and let the duration of the power pump supplying liquid be tD , then there exists

[0019] in, T n2 =n 2 ·T a , T max2 =m 2 ·T a , T n2 is the height h a1 The total heating time of the accumulated slag, T max2 is the height h a1 The maximum time required for heating the accumulated slag, m 2 >n 2 .

[0020] ④ If within the same unit time domain, the slag grab grabs the slag in the heating zone, the second position sensor senses and monitors that the slag height is reduced to h a3 , then the unit time domain is re-timed, h a3 -Δh a Become the unit time domain T a Slag height at the end of time, Δh a It is the height increase of slag accumulation in the previous unit time domain.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention sets a filtering area and a material grabbing area in the slag pool, and supplies the slag after preliminary water filtration upwards through spiral blades, and further ventilates and dehumidifies the slag in the ventilation area through a real-time dynamic ventilation drive control method. At the same time, by recycling the external heat dissipation of the blast furnace, heat is supplied to the interlayer heat conduction plate, and the slag after ventilation and dehumidification is dynamically heated, thereby dehydrating and dehumidifying the hedging slag in an efficient and energy-saving manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the dynamic dehydration device of the present invention.

[0024] Figure 2 for Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0025] Figure 3 for Figure 2 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0026] Among them: 1-blast furnace; 2-slag flushing channel; 3-slag pool, 301-filtration area, 302-grabbing area; 4-separator plate, 401-first position sensor, 402-second position sensor; 5-filtrate bottom plate; 6-interlayer heat conduction plate, 601-upper guide slope, 602-lower guide slope, 603-temperature sensor; 7-spiral blade; 8-servo motor; 9-scraper mechanism; 10-drying air inlet chamber; 11- Air supply chamber; 12-spare chamber; 13-climbing port; 14-blower; 15-spare pipe; 16-drainage area; 17-drainage bottom pipe; 18-liquid heat absorption box; 19-liquid outlet pipe, 1901-detour pipe, 1902-power pump; 20-return pipe; 21-slow flow pipe; 22-gantry; 23-grab crane; 24-slag grab; 25-slag storage bin; 26-slag flushing; F-ventilation area; J-heating area. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Embodiment 1: The present invention relates to a dynamic dehydration device for finished slag, and the specific structure is as follows:

[0029] See also Figure 1 , a slag pool 3 is arranged at the downstream end of the slag flushing channel 2 for slag discharge of the blast furnace 1, a material partition plate 4 and a filtrate bottom plate 5 are fixedly arranged in the slag pool 3, the filtrate bottom plate 5 is located at the lower side of the material partition plate 4, a filtering area 301 is arranged on one side of the material partition plate 4, and a material grabbing area 302 is arranged on the other side, the filtering area 301 is located in the area above the filtrate bottom plate 5, and the material grabbing area 302 is located in the area above the filtrate bottom plate 5. A material climbing port 13 is arranged at the bottom of the material partition plate 4, and the material climbing port 13 connects the filtering area 301 and the material grabbing area 302. A liquid heat absorbing box 18 for absorbing the heat dissipated by the blast furnace is arranged on the periphery of the blast furnace, and the liquid heat absorbing box 18 is connected to a liquid outlet pipe 19 and a liquid return pipe 20, and the liquid outlet pipe 19 is arranged with a power pump 1902.

[0030] In the present invention, a gantry 22 is arranged above the slag pool 3, and a grab crane 23 capable of horizontal movement is arranged on the gantry 22. After the slag grab 24 grabs the "dry slag" at the position J of the heating zone, the grab crane 23 lifts and lowers the slag grab 24 through a traction rope, and the grab crane 23 moves to the top of the slag storage bin 25, and the "dry slag" grabbed by the slag grab 24 is lowered into the slag storage bin.

[0031] See also Figure 1 , Figure 2, a first position sensor 401 is arranged on the side of the material separator 4 facing the filter area 301, and the first position sensor 401 is used to sense and monitor the height of the slag material in the filter area 301. A second position sensor 402 is arranged on the side of the material separator 4 facing the material grabbing area 302, and the second position sensor 402 is used to sense and monitor the height of the slag material in the material grabbing area 302. Spiral blades 7 are installed at the bottom of the filter area 301, the material climbing port 13, and the bottom of the material grabbing area 302. The spiral blades 7 are arranged upwardly along the filter area 301, the material climbing port 13, and the material grabbing area 302. The filtrate bottom plate 5 is arranged obliquely, and the inclination angle of the filtrate bottom plate 5 is the same as the inclination angle of the spiral blades 7. A servo motor 8 is arranged at the periphery of the slag pool 3, and the servo motor 8 drives the spiral blades 7 to rotate. A drying air inlet chamber 10 and an air supply chamber 11 are arranged at the periphery of the slag pool 3. The drying air inlet chamber 10 is connected to the external air environment. A gas drying device is arranged in the drying air inlet chamber 10. The air supply chamber 11 is connected to the upstream drying air inlet chamber 10. The air supply chamber 11 is connected to the drainage area 16. The air supply chamber 11 is equipped with an air outlet fan 14. The air outlet fan 14 supplies air toward the drainage area 16 and ventilates upward through the filtrate bottom plate 5. The air outlet of the air supply chamber 11 is toward the filtrate bottom plate 5 in the structural area directly below the grabbing area 302.

[0032] See also Figure 2 , a drainage area 16 is provided below the filtrate bottom plate 5, and an interlayer heat conducting plate 6 is fixedly provided on the side of the material separation plate 4 facing the material grabbing area 302. The interlayer heat conducting plate 6 is located above the material climbing port 13, and a heating area J is formed above the interlayer heat conducting plate 6. The vertical area of ​​the material grabbing area 302 not blocked by the interlayer heat conducting plate 6 forms a ventilation area F. A scraping mechanism 9 is provided on the upper side of the bottom plate of the drainage area 16, and a drainage bottom pipe 17 is located at the lowest point of the drainage area 16. A spare chamber 12 is provided on the periphery of the slag pool 3, and the spare chamber 12 is connected to the drainage area 16. The spare chamber 12 is located below the air supply chamber 11, and a spare pipe 15 is provided in the spare chamber 12. If the water flow in the drainage area 16 is too large, or the drainage bottom pipe 17 is blocked, and it is impossible to drain the liquid and "micro slag" in time, it can be discharged through the spare pipe 15.

[0033] See also Figure 3The liquid outlet pipe 19 is provided with a power pump 1902. A detour pipe 1901 is also provided on the liquid outlet pipe 19. The detour pipe 1901 is located in the filter area 301. When the slag enters the filter area 301, the slag temperature is also relatively high. The slag with relatively high temperature can be used to properly heat the fluid in the detour pipe 1901, and temperature compensation is performed on the long-distance liquid outlet pipe 19. A slow flow pipe 21 is provided inside the interlayer heat conducting plate 6. The upstream end of the slow flow pipe 21 is connected to the liquid outlet pipe 19, and the downstream end of the slow flow pipe 21 is connected to the return liquid pipe 20. The liquid flow cross-sectional area of ​​the slow flow pipe 21 is larger than the liquid flow cross-sectional area of ​​the liquid outlet pipe 19 and the return liquid pipe 20. When the heat flow passes through the slow flow pipe 21, the speed slows down, and the heat is released to the interlayer heat conducting plate 6. The interlayer heat conducting plate 6 has a built-in temperature sensor 603 . The interlayer heat conducting plate 6 includes an upper guiding inclined surface 601 and a lower guiding inclined surface 602 . The lower guiding inclined surface 602 faces the spiral blade 7 .

[0034] Embodiment 2: The present invention relates to a method for dynamic dehydration of finished slag, including filtering water from the slag in a filtering area, spirally advancing the slag, ventilating and dehumidifying the slag in a ventilation area, and dynamically heating the slag in a heating area.

[0035] Step 1: Slag spiral advancement in the filtration area

[0036] When the slag in the blast furnace 1 is flushed through the slag flushing channel 2, the flushed slag enters the filtering area 301 of the slag pool 3. The first position sensor 401 detects the slag accumulation height h in the filtering area 301. 1 Conduct monitoring.

[0037] The slag in the filtration zone 301 is left to stand for a period of time t 1 After that, the servo motor 8 starts to drive the spiral blade 7 to rotate, pushing the slag at the bottom of the filtering area 301 toward the bottom of the grabbing area 302, wherein f(t 1 )∝f(h 1 ), the more and higher the slag is piled up, the more time it takes for the flowing water of the slag in the filter area 301 to naturally sink and "completely" discharge from the filter area 301.

[0038] During the iron-making process of the blast furnace 1, the liquid heat absorption box 18 absorbs the heat dissipated from the blast furnace 1 and stores the heat. When heat is needed for dehumidifying the slag material, it starts to provide heat to the outside. After the power pump 1902 is started, the liquid heat absorption box 18 transfers the heat to the interlayer heat conduction plate 6.

[0039] Step 2: Ventilation control of slag in the grabbing area

[0040] 1. After the slag at the bottom of the filtering area 301 enters the material grabbing area 302 , the slag begins to accumulate and rise and accumulate upward along the upper guide slope 601 .

[0041] 2. When the second position sensor 402 senses and monitors the slag in the ventilation zone F, the gas drying equipment of the dry air inlet chamber 10 and the air outlet fan 14 of the air supply chamber 11 are started. When the slag in the ventilation zone F just starts to rise and accumulate, the second position sensor 402 cannot monitor the change in the slag height. At this time, the amount of slag is small, and the slag in the ventilation zone F will not rise and accumulate to the upper guide slope 601 of the interlayer heat conduction plate 6, so there is no need to ventilate immediately. Here, even if the slag accumulation height detected by the second position sensor 402 at the beginning is not zero, it includes the slag height below the interlayer heat conduction plate 6. Therefore, the power of the air outlet fan 14 at the beginning is not zero.

[0042] 3. Assume the unit time domain T a The second position sensor 402 senses and monitors that the accumulation height of the slag in the grabbing area 302 changes to Δh. a , Δh a =h a1 -h a2 ,h a1 The unit time domain is T a Slag height at the time starting point, h a2 The unit time domain is T a The slag height at the end of the time.

[0043] 4. Assume that the real-time power of the fan 14 in the next unit time domain is p. If Δh a > 0, then f(p)∝[f 1 (h a1 ), f(Δh a )].

[0044] in, T n1 =n 1 ·T a , T max1 =m 1 ·T a , T n1 is the height h a1 The total ventilation time of the accumulated slag, T max1 That is, height h a1 Maximum ventilation time required for accumulated slag, m 1 >n 1 . The base height h of the slag accumulation changes a1The longer the maintenance time, the smaller the ventilation power parameter for the piled slag material at the base height, and the change of the base height. For example, the original stacking height is 1m, and the ventilation power is 750W at the beginning. After maintaining the stacking height of 1m for a certain period of time, the ventilation power becomes lower and lower, down to 500W, but then the stacking height increases to 1.1m. In addition to the original power attenuation of 500W, the newly added 0.1m new material must be ventilated again, and an additional 75W of power is required. Because it is new material, it needs to be ventilated according to the initial maximum power factor. If the height is later increased to 1.3m, the last additional 0.2m will increase the power parameter by 150W, and the previous additional 0.1m will attenuate the ventilation power parameter according to the ventilation time.

[0045] 5. Let the temperature sensed by the temperature sensor 603 be w, and let the duration of the liquid supply by the power pump 1902 be t D , then there exists

[0046] in, T n2 =n 2 ·T a , T max2 =m 2 ·T a , T n2 is the height h a1 The total heating time of the accumulated slag, T max2 is the height h a1 The maximum time required for heating the accumulated slag, m 2 >n 2 .f 1 (h a1 ), f 2 (h a1 ) only represents the a1 When the temperature w is constant, h a1 , Δh a The larger the value, the longer the time t for the power pump 1902 to supply liquid D This is similar to the ventilation time above. The original height of the slag piled above the upper guide slope 601 is 0.4m. Under the condition of reaching the predetermined heating temperature, the estimated heating time is 8min. After 3min, the slag height increases to 0.5m. The original 0.4m slag has 5min left. The additional 0.1m slag needs another 2min, so the total heating time needs 7min. a1 , Δh a When the predetermined heating temperature w is higher, the power pump 1902 supplies the liquid for a longer time t DOf course, the specific proportional relationship between these heating time and ventilation time is not necessarily the optimal parameter relationship, but only an approximate proportional relationship. The specific relationship needs to be determined based on the actual slag flushing pool structure, ventilation parameters, heating parameters and other configurations, and the optimal parameter proportional relationship can be obtained through multiple experiments.

[0047] 6. If, within the same unit time domain, the slag grab grabs the slag in the heating zone J, the second position sensor 402 senses and monitors that the slag height is reduced to h a3 (In fact, this is also the above Δh a <0), the unit time domain is re-timed, h a3 -Δh a Become the unit time domain T a Slag height at the end of time, Δh a It is the height of the slag accumulation in the previous unit time domain. The slag taken away from the top has been blown or heated for a certain period of time. It is necessary to ensure the ventilation or heating effect of the "new" slag just added upward from the bottom, so h a3 -Δh a Set to unit time domain T a The slag height at the end of the time.

[0048] Embodiment 3: During the slag grabbing process of the present invention: During the grabbing process, the slag grab bucket 24 can control the total amount of material grabbed according to the dynamically changing height of the slag accumulation in the heating zone J and the duration of heating. For example, at time point t 1 →t 2 In the heating zone J, the height of the slag accumulation changes from 1.2m to 1.4m. The top 0.3m has reached the longest heating time, but the bottom layer has an additional 0.2m. When the slag grab 24 grabs the top 0.3m of the accumulated slag, the time point changes from t 2 →t 3 The height of the slag accumulation in heating zone J changes from 1.4m to 1.2m (this is because 0.1m was added to the bottom layer later). The top 0.1m has also reached the longest heating time, and the slag grab 24 can continue to grab the top 0.1m accumulated slag at this time.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dynamic dehydration device for finished slag products, Features: A slag pool (3) is arranged at the downstream end of the slag flushing channel of the blast furnace slag discharge, and a material separator (4) and a filtrate bottom plate (5) are fixedly arranged in the slag pool (3), one side of the material separator (4) is provided with a filtering area (301) located in the area above the filtrate bottom plate (5), and the other side is provided with a material grabbing area (302) located in the area above the filtrate bottom plate (5), and a material climbing port (13) connecting the filtering area (301) and the material grabbing area (302) is arranged at the bottom of the material separator (4), a first position sensor (401) for sensing and monitoring the height of the slag flushing material in the filtering area (301) is arranged on the side of the material separator (4) facing the filtering area (301), and a second position sensor (402) for sensing and monitoring the height of the slag flushing material in the material grabbing area (302) is arranged on the side of the material separator (4) facing the material grabbing area (302); The bottom of the filtering area (301), the material climbing port (13), and the bottom of the material grabbing area (302) are provided with spiral blades (7), and the spiral blades (7) are arranged obliquely upward along the filtering area (301), the material climbing port (13), and the material grabbing area (302). A servo motor (8) for driving the spiral blades (7) to rotate is arranged on the periphery of the slag pool (3), and a drainage area (16) is provided below the filtrate bottom plate (5); The slag pool (3) is provided with a drying air inlet chamber (10) connected to the external air environment and an air supply chamber (11) connected to the liquid discharge area (16) at its periphery; the drying air inlet chamber (10) is connected to the air supply chamber (11) at its downstream, and the air supply chamber (11) is provided with a blower (14); A liquid heat absorbing box (18) for absorbing heat dissipated by the blast furnace is arranged outside the blast furnace, the liquid heat absorbing box (18) is connected to a liquid outlet pipe (19) and a liquid return pipe (20), the liquid outlet pipe (19) is equipped with a power pump (1902) and a detour pipe (1901) located in the filtering area (301); A barrier heat conductive plate (6) is fixedly arranged on one side of the partition plate (4) facing the material grabbing area (302); the barrier heat conductive plate (6) is located above the material climbing port (13); a slow flow pipe (21) connected to a liquid outlet pipe (19) and a liquid return pipe (20) is arranged inside the barrier heat conductive plate (6); a temperature sensor (603) is built into the barrier heat conductive plate (6); the barrier heat conductive plate (6) includes an upper guide inclined surface (601) and a lower guide inclined surface (602) facing the spiral blade (7); a heating area (J) is formed above the barrier heat conductive plate (6); and a ventilation area (F) is formed in the vertical area of ​​the material grabbing area (302) not blocked by the barrier heat conductive plate (6).

2. A dynamic dehydration device for finished slag according to claim 1, Features: A scraping mechanism (9) is arranged on the upper side of the bottom plate of the drainage area (16), and a drainage bottom pipe (17) is arranged at the lowest point of the drainage area (16).

3. The dynamic dehydration device for finished slag according to claim 1, Features: The slag pool (3) is provided with a spare chamber (12) in communication with a drainage area (16) at its periphery. The spare chamber (12) is located below the air supply chamber (11). The spare chamber (12) is provided with a spare pipe (15).

4. The dynamic dehydration device for finished slag according to claim 1, Features: The liquid flow cross-sectional area of ​​the slow flow pipe (21) is greater than the liquid flow cross-sectional areas of the liquid outlet pipe (19) and the liquid return pipe (20).

5. The dynamic dehydration device for finished slag according to claim 1, Features: The filtrate bottom plate (5) is arranged tilted, the tilt angle of the filtrate bottom plate (5) is the same as the tilt angle of the spiral blade (7), and the air outlet of the air supply chamber (11) faces the structural area of ​​the filtrate bottom plate (5) directly below the material grabbing area (302).

6. A method for dynamic dehydration of finished slag, It is characterized in that A dynamic dehydration device for finished slag product according to any one of claims 1 to 5, comprising the following steps: Step 1: Slag spiral advancement in the filtration area ① When the slag in the blast furnace is flushed through the slag flushing channel, it enters the filtration area of ​​the slag pool. The first position sensor measures the slag accumulation height h in the filtration area. 1 Conduct monitoring; ② The slag in the filtration area is left to stand for t 1 After that, the servo motor starts to drive the spiral blade to rotate, pushing the slag at the bottom of the filtration area toward the bottom of the grabbing area, where f(t 1 )∝f(h 1 ); ③The power pump starts, and the liquid heat absorber transfers the heat to the interlayer heat conduction plate; Step 2: Ventilation and heating control of slag in the material grabbing area ① After the slag at the bottom of the filtration area enters the grabbing area, the slag begins to accumulate and rise along the upper guide slope; ② When the second position sensor senses the slag in the ventilation area, the gas drying equipment in the drying air inlet chamber and the air outlet fan in the air supply chamber are started. Set the unit time domain T a The second position sensor senses that the accumulation height of slag in the grabbing area changes to Δh. a , Δh a =h a1 -h a2 ,h a1 The unit time domain is T a Slag height at the time starting point, h a2 The unit time domain is T a The height of the slag at the end of the time; Assume that the real-time power of the fan in the next unit time domain is p, if Δh a > 0, then f(p)∝[f 1 (h a1 ), f(Δh a )]; in, T n1 =n 1 ·T a , T max1 =m 1 ·T a , T n1 is the height h a1 The total ventilation time of the accumulated slag, T max1 That is, height h a1 Maximum ventilation time for accumulated slag, m 1 >n 1 ; ③ Let the temperature sensed by the temperature sensor be w, and let the duration of the power pump supplying liquid be t D , then there exists in, T n2 =n 2 ·T a , T max2 =m 2 ·T a , T n2 is the height h a1 The total heating time of the accumulated slag, T max2 is the height h a1 The maximum time required for heating the accumulated slag, m 2 >n 2 ; ④ If within the same unit time domain, the slag grab grabs the slag in the heating zone, the second position sensor senses and monitors that the slag height is reduced to h a3 , then the unit time domain is re-timed, h a3 -Δh a Become the unit time domain T a Slag height at the end of time, Δh a It is the height increase of slag accumulation in the previous unit time domain.

Images