A slag cooler feed device

Abstract

The utility model relates to metallurgical industry tailings treatment technical field, concretely relates to a kind of cold slag machine feeding device.The cold slag machine feeding device includes tubular shell, feeding screw and driving mechanism.Tubular shell includes receiving end and discharge end, receiving end is provided with feed inlet, and discharge end extends into the feed end of cold slag machine.Feeding screw is rotatably arranged in tubular shell around the axis of tubular shell, the first end of feeding screw is flush with the discharge end of tubular shell, and the second end extends below the feed inlet.Driving mechanism is connected with the second end of feeding screw, for driving feeding screw rotation.Through the above setting, it can solve the problems of tailings blockage, gas leakage, uneven feeding and sealing leakage in the cold slag machine feeding device, and realize efficient, stable and safe transportation of high-temperature tailings.

Description

Technical Field

[0001] This utility model relates to the field of tailings treatment technology in the metallurgical industry, specifically to a cold slag machine feeding device. Background Technology

[0002] Titanium is an important strategic metal resource, possessing properties such as light weight, high strength, and corrosion resistance, and is widely used in aerospace, chemical, and shipbuilding industries. my country's Panzhihua-Xichang region is rich in vanadium-titanium magnetite reserves, accounting for approximately one-third of the country's total titanium resources. A certain group has developed a high-temperature carbonization-low-temperature chlorination process for the resource utilization of high-titanium blast furnace slag, and has built a demonstration production line with an annual output of 40kt of titanium tetrachloride and 15,000 tons of titanium dioxide. In this process, the high-temperature tailings (above 500℃) produced by the chlorination furnace contain a small amount of chloride ions and require continuous cooling treatment through high-temperature silos and slag coolers. However, in existing technologies, the high-temperature tailings are typically fed directly into the slag cooler via chutes, which presents the following serious problems: Tailings clumping and blockage: High-temperature tailings are prone to sticking together and forming clumps in the chute, which leads to poor feeding or even complete blockage, requiring frequent shutdowns for cleaning, which seriously affects production efficiency.

[0003] Uncontrolled gas leakage cannot be effectively contained: exhaust gas from the chlorination furnace may leak back into the feeding system along with the tailings, causing equipment corrosion and environmental pollution, and increasing safety risks.

[0004] Large fluctuations in feed rate: The chute cannot accurately control the feeding speed, resulting in inconsistent feed rates to the slag cooler, affecting the cooling effect and the stability of subsequent processes.

[0005] Sealing and leakage issues: Traditional feeding methods have poor sealing performance, and high-temperature tailings and chlorine-containing gases are prone to leakage, which not only pollutes the environment but also threatens the health of operators.

[0006] The aforementioned problems result in a high failure rate and frequent maintenance of the existing cold slag machine feeding system, which seriously restricts the efficient recycling and utilization of titanium resources. There is an urgent need for a new type of cold slag machine feeding device that can achieve continuous and stable feeding, effectively seal against gas leakage, and prevent blockage. Utility Model Content

[0007] In view of this, the present invention provides a screw conveyor type cold slag machine feeding device, which solves problems such as tail slag blockage, air leakage, uneven feeding and sealing leakage by extending the discharge end into the feeding end of the cold slag machine, thereby achieving efficient, stable and safe conveying of high temperature tail slag.

[0008] This utility model discloses a feeding device for a cold slag machine, comprising a tubular shell, a feeding screw, and a drive mechanism. The tubular shell includes a receiving end and a discharging end, with a feed inlet at the receiving end and the discharging end extending into the feed end of the cold slag machine. The feeding screw is rotatably mounted inside the tubular shell around its axis, with its first end flush with the discharging end and its second end extending below the feed inlet. The drive mechanism is connected to the second end of the feeding screw and drives the feeding screw to rotate.

[0009] In some embodiments, the discharge end of the tubular shell extends 1 to 1.5 meters into the feed end of the slag cooler, and the outer wall of the discharge end is provided with a high-temperature resistant ceramic bushing.

[0010] In some embodiments, the feed screw is a shaftless spiral ribbon, the blade surface of the feed screw is overlaid with a wear-resistant layer, and the blade edge is provided with a replaceable scraper.

[0011] In some embodiments, the drive mechanism includes a geared motor, a torque limiter, and a universal coupling. The input end of the torque limiter is connected to the output shaft of the geared motor, the output end of the torque limiter is connected to the universal coupling, and the universal coupling is connected to the feed screw.

[0012] In some embodiments, the cold slag machine feeding device further includes a moving mechanism, on which a geared motor and a tubular housing are mounted. A bearing seat is provided on the moving mechanism to support the output shaft of the torque limiter.

[0013] In some embodiments, the drive mechanism further includes a vibration sensor and a frequency converter. The vibration sensor is mounted near the bearing housing or universal coupling, and the frequency converter is communicatively connected to the vibration sensor and the geared motor to control the speed of the geared motor based on the vibration signal detected by the vibration sensor.

[0014] In some embodiments, a material level detector is provided on the inner side of the receiving end of the tubular housing, and a pneumatic gate valve is hinged at the inlet. The material level detector and the pneumatic gate valve are interlocked for control.

[0015] In some embodiments, the cold slag mill feeding device further includes a cooling system, which includes a spiral cooling water pipe surrounding the tubular shell and an internal cooling channel disposed at the axis of the feeding spiral, the two forming a circulating cooling loop through a rotary joint.

[0016] In some embodiments, the cold slag mill feeding device further includes a sealing system, which includes a labyrinth seal and a nitrogen sealing ring disposed at the discharge end and the interface of the cold slag mill.

[0017] In some embodiments, a temperature sensor is provided on the inner wall of the discharge end of the tubular housing. The temperature sensor is communicatively connected to the control valve of the cooling system and is used to automatically start the cooling system when the temperature sensor detects that the temperature exceeds a set threshold.

[0018] The beneficial effects of this utility model are as follows: This application extends the open discharge end into the cold slag machine, which makes it less prone to clogging during discharge. Furthermore, the feeding screw has the functions of conveying with a screw ribbon and breaking up agglomerated tailings, effectively solving the clogging problem. The material inside the screw forms a material seal, ensuring effective gas isolation between the high-temperature silo and the cold slag machine. The drive device can adjust the operating frequency according to actual production needs to control the high-temperature tailings conveying capacity, continuously, stably, and evenly conveying the high-temperature tailings into the cold slag machine, reducing the fluctuation range of the feed rate, and conveying the tailings to the inside of the cold slag machine's feed end. This avoids the accumulation of high-temperature tailings in the cold slag machine during production adjustments, preventing leakage at the feed seal. It effectively solves the problems of uneven entry of tailings into the cold slag machine, easy clogging, leakage, and smoke in the low-temperature chlorination production process, which can cause equipment shutdowns and ensure stable and smooth operation of the chlorination furnace. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of a cold slag machine feeding device provided in one embodiment of the present invention; Figure 2 for Figure 1 Sectional view of plane AA.

[0021] Explanation of reference numerals in the attached figures: 1. Tubular shell; 11. Receiving end; 12. Discharging end; 13. Feed inlet; 14. Emergency slag discharge port; 15. High-chromium cast iron wear-resistant layer; 2. Feeding screw; 3. Drive mechanism; 31. Gear motor; 32. Torque limiter; 33. Universal coupling; 4. Moving mechanism; 41. Bearing seat; 5. Cooling system. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to specific examples and accompanying drawings.

[0023] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0024] This utility model proposes a feeding device for a cold slag machine, comprising a tubular shell 1, a feeding screw 2, and a drive mechanism 3. The tubular shell 1 can move along... Figure 1 The structure, arranged horizontally or slightly inclined, includes a receiving end 11 and a discharging end 12. The receiving end 11 has a feed inlet 13 for receiving high-temperature tailings from the silo. The discharging end 12 extends into the feed end of the slag cooler to discharge the high-temperature tailings into the slag cooler. Specifically, the tubular shell 1 adopts a composite structure, including an outer carbon steel shell, a middle aluminum silicate insulation layer, and an inner high-chromium cast iron wear-resistant layer 15. The layers are connected by anchors. An emergency slag discharge port 14 is provided at its bottom. The emergency slag discharge port 14 is equipped with a hydraulically driven gate. When the feeding device suddenly fails, the hydraulic gate can be opened quickly within 3-5 seconds to form an emergency slag discharge channel. The feeding screw 2 is rotatably disposed inside the tubular shell 1, around its axis. The first end of the feeding screw 2 is flush with the discharge end 12 of the tubular shell 1, and the second end extends below the feed inlet 13. When rotating in a predetermined direction, it discharges high-temperature tailings towards the discharge end 12 of the tubular shell 1. Preferably, the pitch of the feeding screw 2 decreases by 10%-20% from the receiving end 11 to the discharge end 12, achieving gradual compression of the high-temperature tailings and effectively preventing clogging. The drive mechanism 3 is connected to the second end of the feeding screw 2 and provides power for its rotation.

[0025] The open discharge end 12 of this application extends into the interior of the slag cooler, making it less prone to clogging during discharge. The feed screw 2 has the functions of conveying with a screw ribbon and breaking up agglomerated tailings, which can effectively solve the clogging problem. It also relies on the material inside the screw to form a material seal, ensuring effective gas isolation between the high-temperature silo and the slag cooler. The drive device can adjust the operating frequency according to actual production needs to control the high-temperature tailings conveying capacity, continuously, stably and evenly conveying the high-temperature tailings into the slag cooler, reducing the fluctuation of the feed rate, and conveying the tailings to the interior of the feed end of the slag cooler. This avoids the accumulation of high-temperature tailings in the slag cooler for a short time during production adjustments, which could lead to leakage at the feed seal. It effectively solves the problems of uneven entry of tailings into the slag cooler, easy clogging, leakage and smoke in the low-temperature chlorination production process, which can cause equipment shutdowns and ensure stable and smooth operation of the chlorination furnace.

[0026] In some embodiments, the discharge end 12 of the tubular shell 1 extends 1 to 1.5 meters into the feed end of the slag cooler. Preferably, the outer wall of the discharge end 12 is provided with a high-temperature resistant ceramic bushing. This dual protection mechanism significantly improves the reliability of equipment operation. The extended structure forms a material sealing section of more than 1 meter, effectively preventing the backflow of chlorination furnace tail gas. At the same time, the ceramic bushing has a temperature resistance of up to 1600℃ and a friction coefficient of <0.15, which extends the service life of the discharge end 12 under continuous contact with high-temperature tail slag of 500-800℃. Its wear resistance is 8 times higher than that of traditional carbon steel materials, completely solving the problem of sealing failure caused by high-temperature corrosion and wear.

[0027] In some embodiments, the feed screw 2 is a shaftless spiral ribbon, which is rotatably mounted inside the tubular housing 1 via a bearing seat 41. The shaftless structure eliminates the risk of material accumulation on the central shaft, thereby increasing the material throughput. The blades of the feed screw 2 are overlaid with a tungsten carbide wear-resistant layer, and the blade edges are equipped with replaceable carbide scrapers, which extends the life of the screw blades and allows for quick replacement when the carbide scrapers wear out, improving maintenance efficiency.

[0028] In some embodiments, the drive mechanism 3 includes a geared motor 31, a torque limiter 32, and a universal coupling 33. The geared motor 31 can be a model BWD5-5.5-87 with a power of 5.5 kW and a maximum speed of 17 r / min. The input end of the torque limiter 32 is connected to the output shaft of the geared motor 31, and the output end of the torque limiter 32 is connected to the universal coupling 33, which is connected to the feed screw 2. The drive mechanism 3 of this application achieves a perfect combination of power transmission and safety protection through a three-stage linkage structure. Specifically, the geared motor 31 provides a stable speed output, and the torque limiter 32 automatically disengages within 0.1 seconds when screw jamming is detected, effectively preventing motor burnout and equipment damage. The universal coupling 33 can compensate for shaft misalignment and eliminate concentricity errors caused by thermal deformation. This combination improves the reliability of continuous operation of the drive system under 500°C high-temperature conditions, and provides a fast overload protection response, making it particularly suitable for processing easily agglomerated high-temperature tailings materials.

[0029] In some embodiments, the cold slag mill feeding device further includes a moving mechanism 4, with a geared motor 31 and a tubular housing 1 mounted on the moving mechanism 4, such as... Figure 1 As shown, the moving mechanism 4 can be a mobile trolley. The mobile trolley uses a heavy-duty steel carrier plate (load capacity ≥ 5 tons) with universal locking wheels, allowing the entire feeding device to move freely on the track. The geared motor 31 and the tubular housing 1 are both mounted on the carrier plate through a support structure. During maintenance, the entire equipment can be quickly moved out of the production line, reducing maintenance time from the traditional 8 hours to 2 hours. The moving mechanism 4 is also equipped with a bearing seat 41, which supports the output shaft of the torque limiter 32. The integrated bearing seat 41 design ensures that the output shaft of the torque limiter 32 remains precisely aligned during movement, avoiding shaft damage caused by repeated disassembly and assembly.

[0030] In some embodiments, the drive mechanism 3 further includes a vibration sensor and a frequency converter (not shown in the figure). The vibration sensor is installed near the bearing housing 41 or the universal coupling 33. The frequency converter is communicatively connected to the vibration sensor and the geared motor 31, and is used to control the speed of the geared motor 31 according to the vibration signal detected by the vibration sensor. Specifically, the high-precision vibration sensor collects vibration data of key parts of the bearing housing 41 in real time. When abnormal vibration is detected, such as when the amplitude exceeds a preset safety threshold (e.g., 4 mm / s), the frequency converter can automatically reduce the speed of the geared motor 31 from the rated 60 rpm to a safe speed of 30 rpm within 0.2 seconds, and trigger a three-level early warning system. This design significantly improves the response speed of the equipment in the event of sudden situations such as material blockage and bearing failure, and can reduce the mechanical failure rate. It is particularly suitable for continuous conveying operations of high-temperature titanium slag (500-800℃) with corrosive and easily agglomerated characteristics, ensuring the stable operation of the production line.

[0031] In some embodiments, a level detector is provided inside the receiving end 11 of the tubular housing 1, and a pneumatic gate valve is hinged at the inlet 13. The level detector and the pneumatic gate valve are interlocked (not shown in the figure). This utility model achieves precise and automated management of the feeding process through the intelligent interlocking control of the level detector and the pneumatic gate valve. Specifically, the high-sensitivity level detector monitors the material accumulation height at the receiving end 11 in real time. When the material level exceeds a preset threshold, the pneumatic gate valve immediately and automatically closes the inlet 13, effectively preventing material overflow; when the material level is lower than a safe value, the gate valve intelligently opens to ensure continuous and stable feeding. This design reduces the fluctuation range of tailings feed from the traditional ±30% to ±5%, eliminating equipment blockage accidents caused by full material.

[0032] In some embodiments, the slag cooler feeding device further includes a cooling system 5, which comprises a spiral cooling water pipe surrounding the tubular shell 1 and an internal cooling channel (not shown in the figure) disposed at the axis of the feeding spiral 2. The two form a circulating cooling loop through a rotary joint. This dual-channel design ensures that the temperature of critical parts is always controlled below 150°C when the equipment processes 700°C high-temperature tailings, and the cooling efficiency is twice that of single-layer water cooling, completely avoiding material creep and seal failure caused by high temperature.

[0033] In some embodiments, the cold slag mill feeding device further includes a sealing system, which comprises a labyrinth seal and a nitrogen sealing ring (not shown in the figure) disposed at the interface between the discharge end 12 and the cold slag mill. The composite sealing system designed in this invention achieves complete media isolation through both mechanical and pneumatic dual protection. Specifically, the labyrinth seal adopts a three-stage staggered tooth structure, which can block more than 90% of dust escape. The nitrogen sealing ring forms a positive air curtain barrier, completely blocking the reverse diffusion of chlorine-containing tail gas. This improves the sealing life of the discharge end 12 under high-temperature conditions of 500℃ and significantly reduces the leakage rate compared to traditional packing seals.

[0034] In some embodiments, a temperature sensor, such as a K-type thermocouple, is provided on the inner wall of the discharge end 12 of the tubular housing 1. The temperature sensor monitors the temperature of the inner wall of the discharge end 12 in real time. The temperature sensor is communicatively connected to the control valve of the cooling system 5, and is used to automatically activate the cooling system 5 when the temperature sensor detects that the temperature exceeds a set threshold (e.g., 600°C), so that the pipe wall temperature drops rapidly to below 300°C. This design significantly improves the response speed of the equipment under sudden over-temperature conditions compared to manual operation, and avoids problems such as housing deformation and sealing failure caused by high temperatures.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A feeding device for a cold slag machine, characterized in that, include: A tubular shell (1) includes a receiving end (11) and a discharging end (12). The receiving end (11) is provided with a feed inlet (13), and the discharging end (12) extends into the feed end of the slag cooler. Feeding screw (2), the feeding screw (2) is rotatably disposed inside the tubular shell (1) around the axis of the tubular shell (1), the first end of the feeding screw (2) is flush with the discharge end (12) of the tubular shell (1), and the second end extends to the bottom of the feed port (13); The driving mechanism (3) is connected to the second end of the feeding screw (2) and is used to drive the feeding screw (2) to rotate.

2. The cold slag machine feeding device according to claim 1, characterized in that, The discharge end (12) of the tubular shell (1) extends into the feed end of the cold slag machine by 1 to 1.5 meters, and the outer wall of the discharge end (12) is provided with a high-temperature resistant ceramic bushing.

3. The cold slag mill feeding device according to claim 1, characterized in that, The feeding screw (2) is a shaftless screw ribbon; the blade surface of the feeding screw (2) is overlaid with a wear-resistant layer, and the blade edge is provided with a replaceable scraper.

4. The cold slag mill feeding device according to claim 1, characterized in that, The drive mechanism (3) includes a geared motor (31), a torque limiter (32) and a universal coupling (33). The input end of the torque limiter (32) is connected to the output shaft of the geared motor (31), the output end of the torque limiter (32) is connected to the universal coupling (33), and the universal coupling (33) is connected to the feed screw (2).

5. The cold slag mill feeding device according to claim 4, characterized in that, It also includes a moving mechanism (4), on which the geared motor (31) and the tubular housing (1) are mounted. A bearing seat (41) is provided on the moving mechanism (4), which is used to support the output shaft of the torque limiter (32).

6. The cold slag mill feeding device according to claim 5, characterized in that, The drive mechanism (3) also includes a vibration sensor and a frequency converter. The vibration sensor is installed near the bearing housing (41) or the universal coupling (33). The frequency converter is communicatively connected to the vibration sensor and the geared motor (31) and is used to control the speed of the geared motor (31) according to the vibration signal detected by the vibration sensor.

7. The cold slag mill feeding device according to claim 1, characterized in that, The material receiving end (11) of the tubular shell (1) is provided with a material level detector on the inner side, and a pneumatic gate valve is hinged at the inlet (13). The material level detector is interlocked with the pneumatic gate valve.

8. The cold slag mill feeding device according to claim 1, characterized in that, It also includes a cooling system (5), which includes a spiral cooling water pipe surrounding the tubular shell (1) and an internal cooling channel located at the axis of the feed screw (2), which together form a circulating cooling circuit through a rotary joint.

9. A slag tap feeder according to claim 1, characterized in that It also includes a sealing system, which includes a labyrinth seal and a nitrogen sealing ring disposed at the interface between the discharge end (12) and the slag cooler.

10. A slag tap feeder according to claim 8, characterized in that A temperature sensor is provided on the inner wall of the discharge end (12) of the tubular shell (1). The temperature sensor is connected in communication with the control valve of the cooling system (5) and is used to automatically start the cooling system (5) when the temperature sensor detects that the temperature exceeds the set threshold.

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