Hardening prevention and control method of cold imprint method slag treatment system

Abstract

The invention relates to the technical field of cold imprint method slag flushing production, in particular to a hardening prevention and control method of a cold imprint method slag treatment system.The cold imprint method slag treatment system comprises a granulation tower, the granulation tower is communicated with a rotary drum distributor, a back flushing water pipe used for back flushing the rotary drum distributor is fixedly inserted into an opening in the tail end of the rotary drum distributor, and the rotary drum distributor is communicated with the granulation tower. A rotary drum is arranged below the rotary drum distributor, a rotary drum pool is arranged below the rotary drum, the opposite positions of the upper side wall and the lower side wall of the rotary drum pool are each provided with a manhole, the size of each manhole meets the requirement that a movable arm of the excavator stretches into the rotary drum pool, the rotary drum pool is communicated with a hot water pool, and a hot water pool top manhole is formed in the top of the hot water pool. The size of the access hole meets the extension requirement of a movable arm of the excavator; after each time of tapping of the blast furnace, the inside of the drum distributor is backwashed through the backwash water pipe. The hardening prevention and treatment method of the cold imprint method slag treatment system is efficient and safe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold stamping and barite production, in particular to a method for preventing and treating hardening of a cold stamping and barite processing system. BACKGROUND

[0002] Cold stamping and barite (INBA) is an efficient blast furnace slag treatment process. The core process of the cold stamping and barite processing system is as follows: the molten slag discharged from the blast furnace flows into the granulation tower through the slag channel, and is quenched and broken into granular water slag under the action of high-pressure slag flushing water; the slag-water mixture (a mixture of water slag and slag flushing water) then enters the rotating drum distributor and is uniformly distributed into the rotating drum; the slag-water is separated through the drum filter screen, and the dewatered water slag is transported out by the belt conveyor, while the slag flushing water containing fine slag passes through the drum filter screen into the drum water pool and then overflows into the hot water pool; the hot water is cooled by the cooling tower and then recycled to the granulation tower by the slag flushing pump. This process realizes the resource recycling of blast furnace slag and the closed-loop circulation of slag flushing water, and has the characteristics of high efficiency and energy saving.

[0003] However, there are serious hardening problems in the actual application of cold stamping and barite. First, the end flow velocity of the rotating drum distributor is insufficient, which easily causes the distributor to be blocked by slag, resulting in uneven distribution of slag and water, affecting the dewatering effect and possibly causing problems such as overflow of the granulation tower, difficulty in slag flushing, and forced shutdown of the cold stamping and barite processing system for maintenance, affecting the stable operation of the blast furnace. Second, the slag flushing water after drum filtration still contains a large amount of fine slag, which deposits in the drum water pool, hot water pool and pipelines to form a hard and solid layer, which not only reduces the effective volume of the water pool, but also increases the operating resistance of the cold stamping and barite processing system; third, the cold stamping and barite processing process is complex, and there are problems such as imbalance of slag and water ratio during slag flushing, clogging of the granulation tower, and poor granulation effect, which further aggravate the risk of slag deposition and hardening.

[0004] Currently, the hardening is mainly cleaned by manual labor, which requires high-intensity work in a limited space, has safety hazards and is low in efficiency, and is difficult to meet the needs of continuous production. The methods such as periodic flushing and mechanical dredging used in the prior art have limited effect, and there is an urgent need for a systematic method for preventing and treating hardening. SUMMARY

[0005] In view of the technical problems of easy clogging of the rotating drum distributor, serious deposition of slag in each water pool, low efficiency of manual cleaning and high-temperature operation safety hazards, the present application provides a method for preventing and treating hardening of a cold stamping and barite processing system.

[0006] The technical solution of the present application is as follows: A kind of cold printing baf process system of hardening prevention method, cold printing baf process system includes granulation tower, granulation tower is communicated with rotary drum distributor, rotary drum distributor end opening, fixed insertion is used for the backflushing water pipe of rotary drum distributor reverse flushing, the other end of backflushing water pipe and rotary drum flushing water main pipe are connected, rotary drum is arranged below rotary drum distributor, rotary drum has multiple rotary drum filter screen in rotary drum, rotary drum water pool is arranged below rotary drum, a maintenance hole is respectively set in the opposite position of the upper side wall and the lower side wall of rotary drum water pool, the size of maintenance hole meets the requirement that excavator movable arm is stretched, rotary drum water pool is communicated with hot water pool, a hot water pool top maintenance hole is set in the top of hot water pool, the size of maintenance hole meets the requirement that excavator movable arm is stretched; During slag treatment, the average flow of molten slag is controlled to be 2-4 t / min, the slag flushing pressure of the slag flushing water in the granulation tower is controlled to be 0.20-0.30 MPa, and the slag flushing water flow range is controlled to be 1200-2400 m 3 / h; After each tapping of the blast furnace is completed, the inside of the rotary drum distributor is backflushed through the backflushing water pipe. The rotary drum water pool is cleaned, two excavators are used in cooperation, and the hardening in the rotary drum water pool is broken and cleaned through a maintenance hole. The hot water pool is cleaned, the movable arm of the excavator is controlled to be stretched into the hot water pool from the hot water pool top maintenance hole, the top hardening and the upper side hardening of the pool wall of the hot water pool are cleaned first and last, and the lower side hardening and the bottom hardening of the pool wall are cleaned by the small excavator entering the hot water pool.

[0007] Further, during slag treatment, the slag flushing water flow range is determined according to the average flow of molten slag, and the calculation formula of the slag flushing water flow range is: slag flushing water flow range=(average flow of molten slag±1)×60×slag-water ratio of molten slag and slag flushing water. Wherein, the unit of the slag flushing water flow range is m 3 / h, The unit of the average flow of molten slag is t / min, The slag-water ratio of molten slag and slag flushing water is set according to the drainage design specification.

[0008] Further, a valve is arranged on the backflushing water pipe, or the backflushing water pipe is connected with the high-temperature-resistant hose through the valve, and the other end of the high-temperature-resistant hose is connected with the rotary drum flushing water main pipe.

[0009] Further, the diameter of the end of the backflushing water pipe becomes smaller along the flow direction of the rotary drum flushing water.

[0010] Further, when the hardening of the rotary drum water pool is cleaned, one excavator first breaks, digs and cleanses the hardening in the rotary drum water pool to the outside of the pool through the upper side wall maintenance hole of the rotary drum water pool, and then the other excavator breaks, digs and cleanses the remaining hardening to the outside of the pool.

[0011] Further, the size of the upper side wall manhole of the drum pool is 3m*1.5m.

[0012] Further, the nominal diameter of the lower side wall manhole of the drum pool is 700mm.

[0013] Further, the size of the top manhole of the hot water pool is 2.8m*4m; and the size of the small excavator is 1.1m*1.1m*1.5m.

[0014] Further, the drum top is not provided with a flow guide channel, which not only eliminates the phenomenon of slag hanging on the flow guide channel, but also reduces the water level of the pool and speeds up the flow speed, thereby further reducing the fine slag deposition.

[0015] Further, the pore size of the drum filter screen is 0.7mm*20mm, which avoids water overflow on both sides of the drum under the premise of improving the filtering effect.

[0016] The beneficial effects of the present application are as follows: The present application provides a method for preventing and treating hardening of a cold printing barite slag treatment system, which comprises the following steps: accurately controlling the slag flushing pressure in the range of 0.20-0.30MPa, and controlling the slag flushing water flow range to be 1200-2400m 3 / h, effectively improving the balance of the slag water ratio, ensuring good slag flushing effect, reducing the amount of fine slag, and reducing the risk of system hardening from the source; by additionally arranging a backwashing device at the end of the drum distributor, using the high-pressure water flow (drum screen flushing water flow) of the drum flushing water main to reversely flush the accumulated slag in the distributor, the problem of uneven distribution of slag and water caused by distributor blockage is effectively prevented; by arranging large manholes on the upper and lower side walls of the drum pool, and using the cooperative working mode of two excavators, the efficient mechanical cleaning of the pool hardening is realized; by arranging a large manhole on the top of the hot water pool, and using the cleaning mode of a large excavator and a small excavator, the risk of manual cleaning in a high-temperature environment is avoided, and the cleaning efficiency is significantly improved. The hardening prevention and treatment method provided by the present application forms a complete hardening prevention and treatment system through the system integration of process parameter optimization, equipment structure improvement and mechanical cleaning means, and significantly improves the reliability of the system operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a cooperation schematic view of the drum distributor and the backwashing water pipe.

[0019] Figure 2 is a schematic diagram of the drum water pool consolidation breaking and cleaning.

[0020] Figure 3 is a schematic diagram of the hot water pool consolidation breaking and cleaning.

[0021] In the figure, 1 is a backwash water pipe, 2 is a drum distributor, 3 is a manual ball valve, 4 is a metal hose, 5 is a drum flushing water main pipe, 6 is a drum water pool, 7 is a drum water pool lower side wall access hole, 8 is a drum water pool upper side wall access hole, 9 is a diversion channel, 10 is a hot water pool, and 11 is a hot water pool top access hole. DETAILED DESCRIPTION

[0022] In order to make the person skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0023] As known by those skilled in the art, in the cold stamping (INBA) slag treatment system, the blast furnace slag is quenched by high-pressure water in the granulation tower to form water slag, and the slag water separation is realized by drum dehydration. However, in actual operation, the gas (such as CO2, H2O vapor) in the blast furnace slag is not fully released, or the alkalinity (CaO / SiO2) is too high, resulting in the formation of a foamy structure (foamed slag) when the slag contacts the punching water in the granulation tower. The foamed slag has low density and large volume, and is easily broken into very fine slag particles (<0.1 mm) during the slag punching process, greatly increasing the content of fine slag in the slag water mixture. The fine slag combined with water may form a viscous cotton-like mixture (slag cotton). The fine slag and slag cotton gradually accumulate in the drum distributor, drum filter screen and various water pools. Due to long-term standing or water temperature changes, the fine slag and slag cotton react with calcium and magnesium ions in the water to form hard silicate scale with a dense structure, which is difficult to remove by hydraulic flushing, and eventually deposits to form cement-like hard blocks (consolidation).

[0024] As known by those skilled in the art, the drum filter screen is composed of longitudinal uniform distribution of desizing wires and transverse uniform distribution of fine steel wires. The spacing between the desizing wires of the drum filter screen on the market is generally fixed at 20 mm, and the spacing between the fine steel wires can be customized according to requirements, such as 0.6 mm, 0.7 mm, 0.8 mm, etc. The pore size described in the present application refers to the size of the pores formed between the desizing wires and the fine steel wires, which is 0.6 mm×20 mm, 0.7 mm×20 mm, 0.8 mm×20 mm, etc.

[0025] The brand of the rotating drum in the following embodiment 1 is PW, and the model is D5000 / 6250.

[0026] Embodiment 1 The existing cold printing bar process residue treatment system comprises a granulation tower, a rotating drum distributor, a rotating drum, a plurality of rotating drum filter screens in the rotating drum, a rotating drum pool, and a hot water pool. The rotating drum distributor is communicated with the granulation tower. The rotating drum is arranged below the rotating drum distributor. The rotating drum filter screens are arranged in the rotating drum. The rotating drum pool is arranged below the rotating drum. The rotating drum pool has a conical structure. The upper section size of the rotating drum pool is 9 m x 6.5 m. The lower section size of the rotating drum pool is 0.6 m x 0.6 m. The height of the rotating drum pool is 6.7 m. The water storage capacity of the rotating drum pool is about 140 m 3 A flow guide channel for uniformly distributing water is arranged at the top of the rotating drum pool. The height of the flow guide channel is 0.3 m. The rotating drum pool is communicated with the hot water pool. The hot water pool has a conical structure. The upper section size of the hot water pool is 8 m x 8 m. The lower section size of the hot water pool is 1 m x 1 m. The height of the hot water pool is 6 m. There is a 0.7 m x 0.7 m maintenance hole at the top of the hot water pool. A residue discharge channel with a nominal diameter of 800 mm is arranged at the bottom of the hot water pool.

[0027] The structure of the cold printing bar process residue treatment system is reformed to prevent hardening, which mainly includes the following five aspects. Firstly, a rotating drum backwashing device is added to the rotating drum distributor. As shown in Figure 1 , an opening is arranged at the end of the rotating drum distributor 2. A backwashing water pipe 1 is fixedly inserted into the opening. The nominal diameter of the backwashing water pipe 1 is 80 mm (DN80). The length of the backwashing water pipe 1 is 1 m. The end of the backwashing water pipe 1 away from the rotating drum distributor is connected with a metal hose 4 through a hand-operated ball valve 3. The other end of the metal hose 4 is connected with a rotating drum flushing water main pipe 5 (with a nominal diameter of 125 mm). The end of the backwashing water pipe 1 fixedly arranged at the end of the rotating drum distributor 2 is processed to have a variable diameter. The nominal diameter of the end is changed to 65 mm (DN65).

[0028] Secondly, the gap size of the rotating drum filter screens is controlled. The rotating drum filter screens in the rotating drum are 316L stainless steel filter screens. A total of 84 rotating drum filter screens are arranged. The size of the rotating drum filter screens is 2000 mm x 651 mm. The aperture of the rotating drum filter screens is 0.7 mm x 20 mm.

[0029] Thirdly, the rotating drum pool is reformed. As shown in Figure 2 , the flow guide channel 9 at the top of the rotating drum pool 6 is removed. A rotating drum pool lower side wall maintenance hole 7 with a nominal diameter of 700 mm (DN700) is added to the bottom side wall of the rotating drum pool 6. The original rotating drum pool upper side wall maintenance hole is expanded. The rotating drum pool upper side wall maintenance hole 8 with a size of 3 m x 1.5 m is cut by using a rope saw.

[0030] Fourthly, the hot water pool is reformed. As shown in Figure 3As shown, the 0.7m×0.7m manhole on the top of the hot water pool 10 is expanded to a 2.8m×4m hot water pool top manhole 11, and a steel structure cover plate is made for the hot water pool top manhole 11.

[0031] After the transformation, the cold printing barra process system includes a granulation tower, the granulation tower is communicated with the rotary drum distributor, an opening is arranged at the end of the rotary drum distributor, a backwashing water pipe is fixedly inserted, the nominal diameter of the backwashing water pipe is 80mm (DN80), the length is 1m, the end of the backwashing water pipe away from the rotary drum distributor is connected with a metal hose through a manual ball valve, and the other end of the metal hose is connected with a rotary drum flushing water main pipe (the nominal diameter is 125mm). The end of the backwashing water pipe fixedly arranged at the end of the rotary drum distributor is subjected to reducing treatment, and the nominal diameter is changed to 65mm (DN65). A rotary drum is arranged below the rotary drum distributor, and the rotary drum has 84 rotary drum filter screens. The size of the rotary drum filter screen is 2000mm×651mm, and the aperture is 0.7mm×20mm. A rotary drum pool is arranged below the rotary drum, and the rotary drum pool has a conical structure. The upper section size of the rotary drum pool is 9m×6.5m, the lower section size is 0.6m×0.6m, the height is 6.7m, and the water storage capacity is about 140m 3 A rotary drum pool lower side wall manhole with a nominal diameter of 700mm (DN700) is arranged on the bottom side wall of the rotary drum pool, a rotary drum pool upper side wall manhole with a size of 3m×1.5m is cut on the upper side wall of the rotary drum pool by using a rope saw, and a flow guide channel is removed. The rotary drum pool is communicated with a hot water pool, and the hot water pool has a conical structure. The upper section size of the hot water pool is 8m×8m, the lower section size is 1m×1m, the height is 6m, a 0.7m×0.7m manhole on the top of the hot water pool is expanded to 2.8m×4m, a steel structure cover plate is made for the hot water pool top manhole, and the hot water pool top manhole is covered. A slag discharge channel with a nominal diameter of 800mm is arranged on the bottom of the hot water pool.

[0032] The operation method of the cold printing barra process system is transformed to prevent and treat the hardening, and mainly includes the following two aspects: Firstly, the slag flushing pressure and the slag flushing water flow are controlled. The average slag flow is controlled to be 3t / min, the slag flushing pressure of the slag flushing water in the granulation tower is controlled to be 0.20-0.30MPa, and the slag flushing water flow range is controlled to be 1200-2400m 3 / h. The slag flushing water flow range is determined according to the average slag flow, and the calculation formula of the slag flushing water flow range is: slag flushing water flow range=(average slag flow±1)×60×slag and slag flushing water ratio. The unit of the slag flushing water flow range is m 3 / h, The unit of the average slag flow is t / min, The slag-water ratio of the molten slag and the slag flushing water is set according to the drainage design specification.

[0033] Specifically, the slag flushing water flow range = (the average molten slag flow ± 1) × 60 min × the slag-water ratio of the molten slag and the slag flushing water = (2-4 t / min) × 60 min × 10 ≈ 1200-2400 m 3 / h, a small flow (1200-1600 m 3 / h) is used when the amount of molten slag is small (2-3 t / min), and the slag flushing water flow is gradually increased when the amount of molten slag increases, which can ensure good slag flushing effect and reduce the fine slag content in the slag flushing water. Controlling the slag flushing pressure and the slag flushing water flow can improve the flowability and stability of the molten slag and reduce the impact of the foamed slag and slag wool generated during slag flushing on the cold stamping granulation process slag treatment system.

[0034] In the second aspect, the rotational speed of the rotating drum is stabilized: when the feeding speed of the slag-water mixture into the rotating drum is 3 t / min, the rotational speed of the rotating drum is stabilized at 0.6 r / min.

[0035] When the cold stamping granulation process slag treatment system is working, the molten slag discharged from the blast furnace flows into the granulation tower through the molten slag channel. The amount of molten slag is small (2-3 t / min) in the early stage, and the amount of molten slag increases in the later stage. The average molten slag flow is controlled at 3 t / min. The slag flushing pressure of the slag flushing water in the granulation tower is controlled at 0.20-0.23 MPa, and the slag flushing water flow range is controlled at 1200-2400 m 3 / h. Gradually increasing the slag flushing water flow in the granulation tower can ensure good slag flushing effect and reduce the fine slag content in the slag flushing water. Controlling the slag flushing pressure and the slag flushing water flow can improve the flowability and stability of the molten slag and reduce the impact of the foamed slag and slag wool generated during slag flushing on the cold stamping granulation process slag treatment system.

[0036] The slag flushing water quenches and breaks the molten slag into granular water slag, and the formed slag-water mixture enters the rotating drum distributor and is uniformly discharged into the rotating drum from the rotating drum distributor. After each tapping of the blast furnace is completed, the staff opens the manual ball valve during inspection, the rotating drum screen washing water in the rotating drum flushing water main flows through the backwashing water pipe to backwash the accumulated slag wool and solidified water slag in the rotating drum distributor, and the pressure of the rotating drum screen washing water is controlled at 1.5 MPa. The slag wool and fine slag are flushed out and fall onto the rotating drum filter screen, and then are sent to the slag belt, so as to avoid the blockage of the rotating drum distributor and ensure the safe and stable operation of the cold stamping granulation process slag treatment system. Moreover, during backwashing, the nominal diameter of the backwashing water pipe decreases along the water flow direction, which can improve the flow rate and flushing effect.

[0037] The slag-water mixture enters the rotating drum, and slag and water are separated through the rotating drum filter screen. The size of the rotating drum filter screen is 2000mm x 651mm, and the aperture is 0.7mm x 20mm. If the aperture is too large, for example, 0.8mm x 20mm, a large amount of fine slag will be included in the slag flushing water after the filtration of slag and water, and the fine slag will be deposited and hardened. If the aperture is too small, for example, 0.6mm x 20mm, although the content of fine slag in the slag flushing water can be reduced, and the filtration effect is improved, the filtration area is correspondingly reduced, and when the same amount of slag is flushed, the water on both sides of the rotating drum is easy to overflow.

[0038] When the feeding speed of the slag-water mixture into the rotating drum is 3t / min (the conventional feeding speed in the prior art), the stable rotating speed of the rotating drum is 0.6r / min. There are 28 buckets in the rotating drum, and when the rotating speed of the rotating drum is 0.6r / min, the slag-water mixture is filtered and separated while rotating with the rotating drum, and the water slag is self-filtered (water slag is filtered by water slag itself. In practice, it is found that water slag itself can also have a sedimentation and filtration effect, so that the content of fine slag in the flushing water entering the rotating drum water pool after filtration is less). When the feeding speed remains unchanged, the smaller the rotating speed of the rotating drum (less than 0.6r / min), the thicker the material layer in the bucket, which is not conducive to self-filtration of water slag. When the feeding speed remains unchanged, the larger the rotating speed of the rotating drum (greater than 0.6r / min), the thinner the material layer in the bucket, although the water slag can be self-filtered, but the large rotating speed of the rotating drum will cause the water content of the water slag to be large when the slag-water mixture is filtered and separated, and the filtration effect is reduced.

[0039] The flushing slag water filtered by the rotating drum enters the rotating drum water pool and the hot water pool in sequence, and finally enters the cold water pool for circulation.

[0040] According to practical experience, it is found that the slag is seriously hung on the guide channel in the actual operation process of the cold stamping process slag treatment system. After technical exchange with the manufacturer, the guide channel is removed, the top of the rotating drum water pool is not hindered, the slag hanging on the guide channel is avoided, and after the guide channel is removed, the water level of the rotating drum water pool is reduced by 0.3m, the amount of water retained in the rotating drum water pool is reduced, the water flow speed is increased, and the situation of fine slag deposition and hardening is further reduced.

[0041] In the rotary drum pool, the formed board is unable to use the machine, and the board can only be cleaned by ton bag hoisting, which is low in efficiency. By increasing the rotary drum pool lower sidewall manhole with a nominal diameter of 700 mm (DN700) at the bottom of the rotary drum pool 6, the rotary drum pool lower sidewall manhole is opened as a slag discharge channel during maintenance, and the board can be quickly cleaned out of the pool after being broken. However, due to the large amount of slag in the pool, the slag is like a sponge that has drunk water, and after shutdown, a large amount of hot water is still separated from the slag sponge and flows out of the rotary drum pool lower sidewall manhole, causing burns to the human body, so the maintenance personnel cannot approach. The use of excavators can solve this problem. Further, the original rotary drum pool upper sidewall manhole is expanded, and the rotary drum pool upper sidewall manhole is cut into a 3m×1.5m rotary drum pool upper sidewall manhole using a rope saw. During maintenance, a 12m long arm excavator can be used to dig to the bottom of the rotary drum pool, break and remove the internal board, and then open the rotary drum pool lower sidewall manhole. A miniature excavator with an extended oil hammer is used to break the remaining board in the rotary drum pool lower sidewall manhole. The two work together, and the mechanical cleaning efficiency is significantly improved compared to manual cleaning.

[0042] For the hot water pool, it is found in actual maintenance that when the accumulated slag board in the hot water pool exceeds 1 / 2 of the volume of the hot water pool, immediate manual cleaning poses a safety hazard (the temperature in the pool is still above 80℃ after the pool is drained of water), and after cooling, manual cleaning is low in efficiency and increases the maintenance time. The internal board and slag affect the water retention of the hot water pool, and the slag treatment system of the cold stamping process is difficult to operate. In order to clean the accumulated slag board in the hot water pool, the 0.7m×0.7m manhole at the top of the hot water pool is expanded to 2.8m×4m, and a steel structure cover plate is made to fit the top manhole of the hot water pool for sealing. After expert evaluation, the expanded size has no effect on the overall hot water pool. During the slag cleaning operation of the hot water pool, the steel structure cover plate is removed, a large excavator is used to remove the large suspended slag (board) at the top of the hot water pool, and then the water slag (board) adhering to the upper side of the pool wall is cleaned. After the large suspended slag at the top of the hot water pool and the water slag on the upper side of the pool wall are cleaned, a small excavator (size: 1.1m long, 1.1m wide, 1.5m high) is lifted to the bottom of the pool using a truck crane, and the board and slag at the bottom of the pool are cleaned to the hopper, and then lifted out of the pool using a truck crane. Not only does this avoid the limitation of having to wait for the pool to cool in existing operations, but it also significantly improves the cleaning efficiency and operation effect.

[0043] Although the present application has been described in detail with reference to the preferred embodiments, it should be understood that the application is not limited to those preferred embodiments. Various modifications and equivalents can be made by those skilled in the art without departing from the spirit and scope of the application. Any and all modifications and equivalents are intended to be included within the scope of the present application.

Claims

1. A method for preventing and treating hardening of a cold printing bagasse treatment system, characterized by, The cold printing barite residue treatment system comprises a granulation tower, the granulation tower is communicated with a rotary drum distributor, an opening is arranged at the end of the rotary drum distributor, a backwashing water pipe for backwashing the rotary drum distributor is fixedly inserted, the other end of the backwashing water pipe is connected with a rotary drum flushing water main pipe, a rotary drum is arranged below the rotary drum distributor, a plurality of rotary drum filter screens are arranged in the rotary drum, a rotary drum pool is arranged below the rotary drum, a maintenance hole is arranged at the opposite positions of the upper side wall and the lower side wall of the rotary drum pool, the size of the maintenance hole meets the requirement of the extension of the excavator arm, the rotary drum pool is communicated with a hot water pool, a hot water pool top maintenance hole is arranged at the top of the hot water pool, the size of the maintenance hole meets the requirement of the extension of the excavator arm; In the slag treatment process, the average flow of the molten slag is controlled to be 2-4 t / min, the slag flushing pressure in the granulation tower is controlled to be 0.20-0.30 MPa, and the flow range of the slag flushing water is controlled to be 1200-2400 m 3 / h. After the completion of each tapping of the blast furnace, the inside of the rotary drum distributor is backwashed through the backwashing water pipe; The rotary drum pool is cleaned, two excavators are used in cooperation, and the hardening in the rotary drum pool is broken and cleaned through a maintenance hole; The hot water pool is cleaned, the excavator arm is controlled to extend into the hot water pool from the hot water pool top maintenance hole, the hardening on the top of the hot water pool and the upper hardening on the pool wall are cleaned first and later, the lower hardening on the pool wall and the bottom hardening are cleaned by the small excavator entering the hot water pool.

2. The method according to claim 1, wherein the method is characterized by, During the residue treatment process, the range of the slag flushing water flow is determined according to the average flow of the molten slag, and the calculation formula of the range of the slag flushing water flow is: the range of the slag flushing water flow=(the average flow of the molten slag±1)×60×the slag-water ratio of the molten slag and the slag flushing water; wherein the unit of the range of the flow rate of the water for washing the slag is m 3 / h, The unit of the average flow of the molten slag is t / min, The slag-water ratio of the molten slag and the slag flushing water is set according to the drainage design specification.

3. The method according to claim 1, wherein the method is characterized by: Valves are arranged on the backwashing water pipe, or the backwashing water pipe is connected with a high-temperature resistant hose through the valves, and the other end of the high-temperature resistant hose is connected with the rotary drum flushing water main pipe.

4. The method according to claim 1 or 3, wherein the method is characterized by, The diameter of the end of the backwashing water pipe decreases along the flow direction of the rotary drum flushing water.

5. The method according to claim 1, wherein the method is characterized by: When the hardening in the rotary drum pool is cleaned, one excavator first breaks, digs and cleanses the hardening in the rotary drum pool to the outside of the pool through the upper side wall maintenance hole of the rotary drum pool, and then the other excavator breaks, digs and cleanses the remaining hardening to the outside of the pool.

6. The method according to claim 1, wherein the method is characterized by: The size of the upper side wall maintenance hole of the rotary drum pool is 3m×1.5m.

7. The method according to claim 1, wherein the method is characterized by: The nominal diameter of the lower side wall maintenance hole of the rotary drum pool is 700mm.

8. The method according to claim 1, wherein the method is characterized by: The size of the hot water pool top maintenance hole is 2.8m×4m; the size of the small excavator is 1.1m×1.1m×1.5m.

9. The method according to claim 1, wherein the method is characterized by, No flow guide channel is arranged at the top of the rotary drum.

10. The method of claim 1, wherein the method is characterized by: The aperture of the rotary drum filter screen is 0.7mm×20mm.

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