Tail salt filling slurry preparation and conveying system and method
By designing a tail salt filling slurry preparation and transportation system, the problems of poor conveying properties of tail salt filling slurry, large water secretion, high operating costs and high risk of equipment blockage in mining goaf treatment are solved, and more efficient goaf treatment and lower operating costs are achieved.
Patent Information
- Application Number
- CN202510113723.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-04-25
AI Technical Summary
The existing mining goaf management technology has problems such as poor conveying properties of tail salt filling slurry, large water excretion, high operating costs and high risk of equipment blockage.
A tail salt filling slurry preparation and conveying system is designed, including a brine supply device, a tail salt supply device, a buffer device, an additive supply device, a first stirring conveying device and a second stirring conveying device. The brine tail salt slurry is prepared by stirring the brine and tail salt, and then stirred in a buffer device and mixed with additives to prepare a tail salt filler slurry and is transported to the target position.
It effectively improves the management effect of mining goaf, reduces operating costs, reduces the risk of equipment blockage, and improves the conveyability of tail salt filling slurry.
Smart Images
Figure CN119869290A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mine goaf management, and in particular to a system and method for preparing and conveying tailing salt filling slurry. Background Art
[0002] The efficient development of mineral resources and environmental protection issues are receiving increasing attention. With the expansion of production scale, the traditional open-pit mining method is no longer suitable for the production needs of modern mines due to its high transportation cost, low efficiency and great impact on the environment. In addition, with the continuous increase in the amount of tailings in the mineral processing process, the environmental protection pressure of mines is also increasing.
[0003] For example, there is currently little research on the filling process of potash mines, and the existing process does not take into account the situation of lump tailings. The large-particle tailings have poor transportability when preparing filling slurry, the particles settle quickly, the slurry segregates severely, and the risk of pipe blockage is high; the amount of water seepage in the goaf is large, making water seepage a new source of danger; dehydrating the tailings before filling them only increases power consumption, resulting in high operating costs and poor economic benefits; the existing process also does not consider the problem of rapid reaction between additives and brine. After the brine and additives are combined, the pumping time is short, which increases the risk of system blockage caused by equipment failure. In order to ensure the safe flow rate range for filling and the time required for stirring preparation, the effective radiation pipeline length in the filling process is limited, and the radiation distance is short.
[0004] Therefore, in the process of underground mineral mining, how to effectively manage the goaf and deal with tailings and brine has become a key challenge in mine goaf management technology. Summary of the invention
[0005] In view of this, the present application provides a tailing salt filling slurry preparation and transportation system and method, which can effectively improve the treatment effect of mine goaf areas.
[0006] In the first aspect, an embodiment of the present application provides a tailing salt filling slurry preparation and conveying system, comprising: a brine supply device, a tailing salt supply device, a buffer device, an additive supply device, a first stirring and conveying device, and a second stirring and conveying device; the first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tailing salt supply device to obtain brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; the second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tailing salt filling slurry, and convey the tailing salt filling slurry to a target position.
[0007] In a specific embodiment, the brine supply device includes a brine buffer device; the brine supply device is provided with a brine level meter to monitor the amount of brine in the brine buffer device; and / or the brine supply device is provided with at least one of a brine delivery pump, a brine flow meter, and a brine control valve to deliver the brine to the first stirring and conveying device.
[0008] In a specific embodiment, the tail salt supply device includes a tail salt cache device; the tail salt supply device is provided with a tail salt level meter to monitor the amount of tail salt in the tail salt cache device; and / or the tail salt supply device is provided with at least one of a tail salt conveying pump, a tail salt concentration meter, a tail salt flow meter, and a tail salt control valve to convey the tail salt to the first stirring and conveying device.
[0009] In a specific embodiment, the tail salt supply device includes a screening device; the tail salt cache device includes a first tail salt cache device and a second tail salt cache device; the screening device is used to screen the tail salt that does not exceed the preset water content to obtain the tail salt that is not larger than the preset particle size, and the screening device is also provided with a crushing device, and the crushing device is used to crush the tail salt that is larger than the preset particle size; wherein, the first tail salt cache device is used to cache the tail salt that exceeds the preset water content, and the second tail salt cache device is used to cache the tail salt that is not larger than the preset particle size obtained by the screening device; the first tail salt cache device is provided with at least one of the tail salt level meter, the tail salt delivery pump, the tail salt concentration meter, the tail salt flow meter, and the tail salt control valve to deliver the tail salt to the first stirring and conveying device; the second tail salt cache device is provided with the tail salt level meter, and at least one of the tail salt feeder and the tail salt meter to deliver the tail salt to the first stirring and conveying device.
[0010] In a specific embodiment, the first stirring and conveying device is provided with a first stirring device and a first stirring level meter, the first stirring level meter is used to monitor the amount of stirring material in the first stirring device; and / or the first stirring and conveying device is provided with at least one of a first control valve and a first conveying pump to convey the brine tail salt slurry to the cache device.
[0011] In a specific embodiment, the cache device is provided with a cache material level meter to monitor the amount of brine tail salt slurry in the cache device; and / or the cache device is provided with a cache material agitator to stir the cached brine tail salt slurry; and / or the cache device is provided with at least one of a cache material conveying pump, a cache material concentration meter, a cache material flow meter, a cache material control valve, and a cache material reversing valve to convey the brine tail salt slurry to the second stirring and conveying device.
[0012] In a specific embodiment, the second stirring and conveying device is provided with a second stirring device and a second stirring level meter, and the second stirring level meter is used to monitor the amount of stirring material in the second stirring device; and / or the second stirring and conveying device is provided with at least one of a second control valve and a second conveying pump to convey the tail salt filling slurry to the target position.
[0013] In a specific embodiment, the additive supply device at least includes a first additive supply device and a second additive supply device, wherein the first additive supply device conveys the additive to the second additive supply device, and the second additive supply device conveys the additive to the second stirring and conveying device; the first additive supply device is provided with a first powder bin and a first additive level meter, the first additive level meter is used to monitor the amount of additive in the first powder bin, and the first additive supply device is also equipped with a pneumatic conveying device to convey the additive to the second additive supply device; and / or the second additive supply device is provided with a second powder bin and a second additive level meter, the second additive level meter is used to monitor the amount of additive in the second powder bin, and the second additive supply device is also equipped with an additive feeder and an additive meter to convey the additive to the second stirring and conveying device.
[0014] In a specific embodiment, the tailing salt filling slurry comprises the following components in parts by weight: 55-80% tailing salt, 15-40% brine, and 1-10% additives; and / or the additives include at least one of quicklime, fly ash, cement, and magnesium oxide, wherein the Cao content in the quicklime is not less than 80%; and / or the tailing salt is a tailing salt with a sodium chloride content of ≥95% produced in a potassium salt ore beneficiation process; and / or the brine is a solution containing magnesium chloride with a concentration of 20-35% produced in a potassium salt ore beneficiation process.
[0015] In the second aspect, an embodiment of the present application also provides a method for preparing and conveying a tailing salt filling slurry, comprising: supplying brine to a first stirring and conveying device with a brine supply device, and supplying tail salt to the first stirring and conveying device with a tail salt supply device; the first stirring and conveying device stirs the brine and the tail salt to obtain a brine tail salt slurry, and supplies the brine tail salt slurry to a buffer device; the buffer device supplies the brine tail salt slurry to a second stirring and conveying device, and an additive supply device supplies an additive to the second stirring and conveying device; the second stirring and conveying device stirs the brine tail salt slurry and the additive to obtain a tail salt filling slurry, and conveys the tail salt filling slurry to a target position; wherein the distance between the second stirring and conveying device and the target position is less than the distance between the first stirring and conveying device and the target position.
[0016] The tail salt filling slurry preparation and conveying system and method provided by the embodiment of the present application include: a brine supply device, a tail salt supply device, a buffer device, an additive supply device, a first stirring and conveying device, and a second stirring and conveying device; the first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tail salt supply device to obtain brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; the second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tail salt filling slurry, and convey the tail salt filling slurry to the target position. The system can effectively improve the treatment effect of the goaf area of the mine. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of a tailing salt filling slurry preparation and delivery system provided in an embodiment of the present application; Figure 2 A flow chart of a method for preparing and conveying tailing salt filling slurry provided in an embodiment of the present application. DETAILED DESCRIPTION
[0019] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0020] It should be clear that 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 ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0021] At present, there is little research on the filling process of potash mines, and the existing process does not take into account the situation of bulk tailings. The large-particle tailings have poor transportability when preparing filling slurry, the particles settle quickly, the slurry segregates severely, and the risk of pipe blockage is high. The amount of water seepage in the goaf is large, making water seepage a new source of danger. Dehydrating the tailings before filling only increases power consumption, resulting in high operating costs and poor economic benefits. The existing process also does not take into account the rapid reaction of additives and brine. After the brine and additives are combined, the pumping time is short, which increases the risk of system blockage caused by equipment failure. In order to ensure the safe flow rate range of filling and the time required for stirring preparation, the effective radiation pipeline length in the filling process is limited, and the radiation distance is short. In order to solve the above problems, Figure 1As shown, in the first aspect, an embodiment of the present application provides a tailing salt filling slurry preparation and transportation system, which may include: a brine supply device, a tailing salt supply device, a buffer device, an additive supply device, a first stirring and conveying device and a second stirring and conveying device.
[0022] The brine supply device is used to supply brine to the first stirring and conveying device. The brine can be an aqueous solution of dissolved salts that are not fully utilized during the mining production process. For example, the brine produced during the beneficiation process of potash ore is a solution containing magnesium chloride with a concentration of 20-35%. The tailing salt supply device is used to supply tailing salt to the first stirring and conveying device. The tailing salt can be tailing waste generated during the mining production process. For example, the main component of the tailing waste after deep extraction of potash ore is sodium chloride. The tailing salt can exist in the form of slurry or solid. When the tailing salt exists in the form of slurry, the tailing salt can be first transported to the cache device for use. When the tailing salt is a dry sample or has a low water content, it can be first screened. The qualified particle size after screening enters the cache device for standby, and the unqualified particle size enters the cache device for standby after crushing. If the tailing salt is in a slurry state, it is pumped to the first stirring and conveying device. If the tailing salt is a dry sample or has a low water content, it can be accurately fed to the first stirring and conveying device through a belt feeder and a meter.
[0023] The first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tail salt supply device to obtain brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; the second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tail salt filling slurry, and convey the tail salt filling slurry to the target position.
[0024] The first stirring and conveying device and the second stirring and conveying device can be separated by a preset distance or a preset height according to the working conditions. Compared with the first stirring and conveying device, the second stirring and conveying device is closer to the target position to be filled. In this way, the first stirring and conveying device can be used to stir the brine and tail salt to obtain the brine tail salt slurry, and the second stirring and conveying device can be used to stir the brine tail salt slurry and the additive to obtain the tail salt filling slurry, so that the additive can be combined with the brine closer to the target position to be filled, avoiding the premature combination of brine and additives and affecting the pumpable distance of the tail salt filling slurry. For example, when the first stirring and conveying device and the second stirring and conveying device are separated by a preset height, and the target position to be filled is located underground, the first stirring and conveying device can be arranged above the well, and the second stirring and conveying device can be arranged underground to be closer to the target position to be filled; or the first stirring and conveying device and the second stirring and conveying device are separated by a preset distance, and the second stirring and conveying device is arranged at a working location closer to the target position to be filled than the first stirring and conveying device. It can be understood that by using the first stirring and conveying device and the second stirring and conveying device of the present application, the adding position of the additive can be reasonably arranged at the filling operation site, the radiation range of the tail salt filling slurry can be optimized, and the conveyable distance can be increased.
[0025] In some embodiments, the tailing salt filling slurry preparation and conveying system may be further configured with an automatic control system, which uses the automatic control system to control the brine supply device, the tailing salt supply device, the buffer device, the additive supply device, the first stirring and conveying device and the second stirring and conveying device to improve the automation level of the system.
[0026] The tail salt filling slurry preparation and conveying system provided by the embodiment of the present application includes: a brine supply device, a tail salt supply device, a buffer device, an additive supply device, a first stirring and conveying device, and a second stirring and conveying device; the first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tail salt supply device to obtain brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; the second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tail salt filling slurry, and convey the tail salt filling slurry to the target position. The system can effectively improve the treatment effect of the goaf area of the mine.
[0027] Optionally, in one embodiment of the present application, the tailings salt filling slurry includes the following components in parts by weight: 55-80% tailings salt, 15-40% brine, and 1-10% additives; and / or the additives include at least one of quicklime, fly ash, cement, and magnesium oxide, wherein the Cao content in the quicklime is not less than 80%; and / or the tailings salt is a tailings salt with a sodium chloride content ≥95% produced in the potash mine beneficiation process; and / or the brine is a solution containing magnesium chloride with a concentration of 20-35% produced in the potash mine beneficiation process.
[0028] Optionally, in one embodiment of the present application, the additive supply device includes at least a first additive supply device and a second additive supply device, wherein the first additive supply device conveys additives to the second additive supply device, and the second additive supply device conveys additives to the second stirring and conveying device; the first additive supply device is provided with a first powder bin and a first additive level meter, the first additive level meter is used to monitor the amount of additives in the first powder bin, and the first additive supply device is also equipped with a pneumatic conveying device to convey additives to the second additive supply device; and / or the second additive supply device is provided with a second powder bin and a second additive level meter, the second additive level meter is used to monitor the amount of additives in the second powder bin, and the second additive supply device is also equipped with an additive feeder and an additive meter to convey additives to the second stirring and conveying device.
[0029] For example Figure 1 As shown, the first additive supply device may include a first powder silo arranged above the well, and the second additive supply device may include a second powder silo arranged underground. The additive can be transported to the first additive supply device located on the ground by a powder tanker for standby use. The first additive supply device is equipped with a first additive level meter to ensure that the additive amount meets the filling requirements and avoids explosion. When the second additive level meter of the second additive supply device located underground gives an alarm, the additive can be transported from the first additive supply device to the second additive supply device by pneumatic conveying equipment. Figure 1 The pneumatic conveying equipment can be a commonly used powder power conveying device, for example, it can be equipped with a PLC control cabinet, which controls the equipment switch through an automatic control system, and automatically controls the start and stop of the pneumatic conveying equipment according to the count value of the second additive level meter of the second additive supply device in the well, so as to achieve the effect of automatic feeding. During the filling operation, the second additive supply device can use an additive feeder, an additive meter, such as a spiral meter, to accurately and quantitatively supply additives to the second stirring and conveying device; specifically, the additive feeder and the additive meter can be equipped with a frequency conversion control cabinet, and the frequency can be adjusted by the automatic control system to control the feeding amount, and the feeding amount of the additive can be accurately controlled by overweighing, underweighing and inching precision weighing.
[0030] Optionally, in one embodiment of the present application, the brine supply device includes a brine buffer device; the brine supply device is provided with a brine level meter to monitor the amount of brine in the brine buffer device; and / or the brine supply device is provided with at least one of a brine delivery pump, a brine flow meter, and a brine control valve to deliver brine to the first stirring and conveying device. It can be understood that the brine supply device is provided with a brine level meter to monitor the amount of brine in the brine buffer device, which can ensure that the amount of brine meets the filling requirements and avoids overflow; the brine delivery pump can adopt a slurry pump, and the slurry pump can be equipped with a frequency conversion control cabinet, which can automatically control and adjust the frequency of the slurry pump and control the feeding capacity. The brine flow meter can monitor the delivery flow of the brine in real time, and the brine control valve can adopt a pipe clamp valve. By adjusting the opening of the pipe clamp valve, the brine feeding flow set by the automatic control system can be achieved.
[0031] Optionally, in one embodiment of the present application, the tail salt supply device includes a tail salt buffer device; the tail salt supply device is provided with a tail salt level meter to monitor the amount of tail salt in the tail salt buffer device; and / or the tail salt supply device is provided with at least one of a tail salt delivery pump, a tail salt concentration meter, a tail salt flow meter, and a tail salt control valve to deliver tail salt to the first stirring and conveying device. It can be understood that the tail salt supply device is provided with a tail salt buffer device and a tail salt level meter to ensure that the amount of tail salt meets the filling requirements and avoids overflow; the tail salt delivery pump can also be a slurry pump, and the slurry pump can also be equipped with a frequency conversion control cabinet, and the slurry pump frequency can be adjusted by automatic control to control the feeding capacity, the tail salt flow meter monitors and feeds back the delivery flow of the tail salt in real time, the tail salt concentration meter monitors and feeds back the slurry concentration of the tail salt in real time, and the tail salt control valve can also be a pipe clamp valve, and the tail salt feeding amount set by the automatic control system can be achieved by adjusting the opening of the pipe clamp valve.
[0032] Optionally, in one embodiment of the present application, the tail salt supply device includes a screening device; the tail salt cache device includes a first tail salt cache device and a second tail salt cache device; the screening device is used to screen the tail salt not exceeding a preset water content to obtain tail salt not larger than a preset particle size, and the screening device is also provided with a crushing device, and the crushing device is used to crush the tail salt larger than the preset particle size; wherein, the first tail salt cache device is used to cache the tail salt exceeding the preset water content, and the second tail salt cache device is used to cache the tail salt not larger than the preset particle size obtained by the screening device; the first tail salt cache device is provided with at least one of a tail salt level meter, a tail salt delivery pump, a tail salt concentration meter, a tail salt flow meter, and a tail salt control valve to deliver the tail salt to the first stirring and conveying device; the second tail salt cache device is provided with a tail salt level meter, and at least one of a tail salt feeder and a tail salt meter to deliver the tail salt to the first stirring and conveying device.
[0033] The preset water content of the tail salt can be determined according to the specific working conditions, for example, in the present embodiment, the preset water content can be 20%. According to the different water contents of the tail salt, the tail salt is cached to different devices, for example, the first cache device of the tail salt is used to cache the tail salt exceeding the preset water content of 20%. For the tail salt not exceeding the preset water content of 20%, it can be screened by the screening device to obtain the tail salt not greater than the preset particle size, for example, 5mm, and for the tail salt greater than the preset particle size 5mm, it can be crushed by the crushing device so that the particle size of the tail salt after the crushing is less than the preset particle size, and the tail salt not greater than the preset particle size obtained by the cache screening device can be transported to the second cache device of the tail salt. In some embodiments, the screening equipment can be selected according to the different suitability of the tail salt moisture content. For example, when the tail salt moisture content is lower than 5%, the screening equipment can specifically use a vibrating screen. When the tail salt moisture content is greater than or equal to 5%, the screening equipment can specifically use a drum screen. The qualified particle size of the tail salt after screening should be less than or equal to 5 mm, and the proportion of particles with a particle size less than or equal to 5 mm should be greater than or equal to 80%. The actual screen size is adjusted according to the specific situation of the tail salt.
[0034] The tail salt level meter can ensure that the tail salt reserves meet the filling needs. Since the agglomeration time of tail salt is affected by many factors, including environmental humidity, temperature, and the composition of tail salt, the tail salt cache time in the first tail salt cache device and the second tail salt cache device should not be greater than the tail salt agglomeration time, for example, it can be controlled within 2 hours. The tail salt feeder configured in the second tail salt cache device can specifically be a belt feeder. The tail salt feeder and the tail salt meter can be configured with a frequency conversion control cabinet, and the frequency can be adjusted through the automatic control system to control the feeding capacity. The tail salt meter can feedback the feeding amount in real time, and accurately control the feeding amount by overweighing deduction, underweighing supplementary weighing, and inching precision weighing.
[0035] Optionally, in one embodiment of the present application, the first stirring and conveying device is provided with a first stirring device and a first stirring level meter, the first stirring level meter is used to monitor the amount of stirring material in the first stirring device; and / or the first stirring and conveying device is provided with at least one of a first control valve and a first conveying pump to convey the brine tail salt slurry to the cache device.
[0036] In this embodiment, the water seepage rate of the brine tail salt slurry is less than or equal to 5%, and the slump is 260mm~290mm. The first stirring device can adopt the slurry mixing device commonly used in the filling process, and the first stirring material level meter equipped can avoid the overflow of the first stirring device. The first delivery pump can adopt a plunger pump and be equipped with a frequency conversion control cabinet, and the pump frequency can be adjusted by the automatic control system to control the flow rate. The first control valve can also adopt a pipe clamp valve, and the pipe clamp valve opening can be adjusted by the automatic control system to ensure the stability of the material level and accurately adjust the discharge flow rate.
[0037] It should be pointed out that when the first filling multiple is greater than or equal to 4, the first delivery pump can use a plunger pump to transport the brine tail salt slurry, and when the filling multiple is less than 4, the brine tail salt slurry can also be transported by gravity; wherein, the first filling multiple is: the first pipeline length / the first height difference, the first pipeline length refers to the length of the conveying pipeline from the first stirring and conveying device to the second stirring and conveying device, the first height difference refers to the height difference from the first stirring and conveying device to the second stirring and conveying device, and the first filling multiple in this embodiment is 8.
[0038] Optionally, in one embodiment of the present application, the cache device is provided with a cache material level meter to monitor the amount of brine tailings slurry in the cache device; and / or the cache device is provided with a cache material agitator to stir the cached brine tailings slurry; and / or the cache device is provided with at least one of a cache material conveying pump, a cache material concentration meter, a cache material flow meter, a cache material control valve, and a cache material reversing valve to convey the brine tailings slurry to the second stirring and conveying device.
[0039] The buffer device may be provided with a buffer material agitator. The fluid dynamic characteristics of the buffer material agitator should enable the materials in the entire buffer device to be fully stirred. The effective volume of the buffer device shall not be less than twice the sum of the volume of the upstream filling pipeline and the volume of the first stirring and conveying device to cope with emergencies. The buffer device is equipped with a buffer material level gauge to ensure that the brine tail salt slurry meets the filling requirements and avoids overflow. The buffer material conveying pump may adopt the power conveying equipment commonly used for mine filling, and its equipment rated pressure may be determined according to the setting position of the second stirring and conveying device. The buffer material conveying pump may also be equipped with a frequency conversion control cabinet. The frequency of the buffer material conveying pump may be adjusted by the automatic control system to control the feeding capacity. The buffer material flow meter may monitor the feedback conveying flow in real time. The buffer material concentration meter may monitor the feedback slurry concentration in real time. The buffer material control valve may adopt a pipe clamp valve. The opening of the pipe clamp valve may be adjusted to achieve the feeding amount set by the automatic control system. The buffer material reversing valve may adopt an electric three-way reversing valve. The automatic control system may control the brine tail salt slurry to be conveyed to, for example Figure 1 The multiple second stirring and conveying devices #1, #2, etc. shown are capable of performing filling operations on multiple target locations.
[0040] Optionally, in one embodiment of the present application, the second stirring and conveying device is provided with a second stirring device and a second stirring level meter, the second stirring level meter is used to monitor the amount of stirring material in the second stirring device; and / or the second stirring and conveying device is provided with at least one of a second control valve and a second conveying pump to transport the tail salt filling slurry to the target position.
[0041] The second stirring and conveying device can be arranged at the same position or a close position to the second additive supply device, for example, in the same underground chamber. Its position is determined according to the conveyable time and conveying speed of the tailings salt filling slurry and the service pipeline distance to the target position of the goaf, wherein the service pipeline distance = (setting time of tailings salt filling slurry - stirring preparation time of the second stirring and conveying device - switching time of faulty equipment) × conveying speed of tailings salt filling slurry.
[0042] The second stirring device can be a slurry mixing device commonly used in the filling process. Since the brine tail salt slurry has been fully stirred in the previous process, the second stirring device can appropriately reduce the stirring time, for example, not less than 90 seconds, so that the prepared tail salt filling slurry has more ample transportation time. The second stirring material level meter can meet the filling requirements and avoid overflowing slurry. The second control valve can also use a pipe clamp valve. The automatic control system adjusts the pipe clamp valve opening to control the slurry liquid level in the second stirring and conveying device, thereby controlling the stirring time.
[0043] It should be noted that when the second filling multiple is greater than or equal to 4, the second delivery pump can use a plunger pump to deliver the tail salt filling slurry, and when the second filling multiple is less than 4, the tail salt filling slurry can also be delivered by gravity; wherein, the second filling multiple is: second pipeline length / second height difference, the second pipeline length refers to the length of the filling pipeline from the second stirring and conveying device to the target position to be filled, the second height difference refers to the height difference from the second stirring and conveying device to the target position to be filled, and the second filling multiple in this embodiment is 8. When the second delivery pump uses a plunger pump, it can also be equipped with a frequency conversion control cabinet to control the flow rate by adjusting the plunger pump frequency through the automatic control system.
[0044] On the second aspect, the embodiments of the present application also provide a method for preparing and conveying tailing salt filling slurry, which can effectively improve the treatment effect of mine goaf areas.
[0045] like Figure 2 As shown, the method for preparing and conveying tailing salt filling slurry provided in the embodiment of the present application may include: S11, supplying brine to the first stirring and conveying device through a brine supply device, and supplying tail salt to the first stirring and conveying device through a tail salt supply device; S12, the first stirring and conveying device stirs the brine and the tail salt to obtain the brine tail salt slurry, and supplies the brine tail salt slurry to the buffer device; S13, supplying brine tail salt slurry to the second stirring and conveying device by using the buffer device, and supplying additives to the second stirring and conveying device by using the additive supply device; S14, the second stirring and conveying device stirs the brine tail salt slurry and the additive to obtain the tail salt filling slurry, and conveys the tail salt filling slurry to the target position; wherein the distance between the second stirring and conveying device and the target position is smaller than the distance between the first stirring and conveying device and the target position.
[0046] The embodiment of the present application provides a method for preparing and conveying tail salt filling slurry, comprising: a brine supply device, a tail salt supply device, a buffer device, an additive supply device, a first stirring and conveying device, and a second stirring and conveying device; the first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tail salt supply device to obtain brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; the second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tail salt filling slurry, and convey the tail salt filling slurry to the target position; wherein the distance between the second stirring and conveying device and the target position is less than the distance between the first stirring and conveying device and the target position. This method can effectively improve the treatment effect of the goaf area of the mine.
[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0048] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0049] In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.
[0050] For the convenience of description, the above device is described by dividing the functions into various units / modules. Of course, when implementing the present application, the functions of each unit / module can be implemented in the same or multiple software and / or hardware.
[0051] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A tail salt filling slurry preparation and delivery system, characterized in that: include: A brine supply device, a tail salt supply device, a buffer device, an additive supply device, a first stirring and conveying device, and a second stirring and conveying device; The first stirring and conveying device is used to stir the brine supplied by the brine supply device and the tail salt supplied by the tail salt supply device to prepare brine tail salt slurry, and supply the brine tail salt slurry to the buffer device; The second stirring and conveying device is used to stir the brine tail salt slurry supplied by the buffer device and the additive supplied by the additive supply device to obtain tail salt filling slurry, and convey the tail salt filling slurry to a target position.
2. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The brine supply device comprises a brine buffer device; the brine supply device is provided with a brine level meter to monitor the amount of brine in the brine buffer device; and / or The brine supply device is provided with at least one of a brine delivery pump, a brine flow meter, and a brine control valve to deliver the brine to the first stirring and conveying device.
3. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The tail salt supply device comprises a tail salt buffer device; the tail salt supply device is provided with a tail salt level meter to monitor the amount of tail salt in the tail salt buffer device; and / or The tail salt supply device is provided with at least one of a tail salt delivery pump, a tail salt concentration meter, a tail salt flow meter, and a tail salt control valve to deliver the tail salt to the first stirring and conveying device.
4. The tail salt filling slurry preparation and delivery system according to claim 3, characterized in that: The tail salt supply device includes a screening device; the tail salt cache device includes a first tail salt cache device and a second tail salt cache device; The screening device is used to screen the tail salt that does not exceed the preset water content to obtain the tail salt that is not larger than the preset particle size. The screening device is also provided with a crushing device, and the crushing device is used to crush the tail salt that is larger than the preset particle size. Among them, the first tail salt cache device is used to cache tail salt exceeding the preset water content, and the second tail salt cache device is used to cache tail salt that is not larger than the preset particle size obtained by screening by the screening device; the first tail salt cache device is provided with at least one of the tail salt level meter, the tail salt delivery pump, the tail salt concentration meter, the tail salt flow meter, and the tail salt control valve to deliver tail salt to the first stirring and conveying device; the second tail salt cache device is provided with the tail salt level meter, and at least one of the tail salt feeder and the tail salt meter to deliver tail salt to the first stirring and conveying device.
5. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The first stirring and conveying device is provided with a first stirring device and a first stirring material level meter, and the first stirring material level meter is used to monitor the amount of stirring material in the first stirring device; and / or The first stirring and conveying device is provided with at least one of a first control valve and a first conveying pump to convey the brine tail salt slurry to the buffer device.
6. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The cache device is provided with a cache material level meter to monitor the amount of brine tail salt slurry in the cache device; and / or The buffer device is provided with a buffer material stirrer to stir the buffered brine tail salt slurry; and / or The buffer device is provided with at least one of a buffer material conveying pump, a buffer material concentration meter, a buffer material flow meter, a buffer material control valve, and a buffer material reversing valve to convey the brine tail salt slurry to the second stirring and conveying device.
7. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The second stirring and conveying device is provided with a second stirring device and a second stirring material level meter, and the second stirring material level meter is used to monitor the amount of stirring material in the second stirring device; and / or The second stirring and conveying device is provided with at least one of a second control valve and a second conveying pump to convey the tail salt filling slurry to the target position.
8. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The additive supply device at least comprises a first additive supply device and a second additive supply device, wherein the first additive supply device delivers the additive to the second additive supply device, and the second additive supply device delivers the additive to the second stirring and conveying device; The first additive supply device is provided with a first powder bin and a first additive level meter, the first additive level meter is used to monitor the amount of additive in the first powder bin, and the first additive supply device is also equipped with a pneumatic conveying device to convey the additive to the second additive supply device; and / or The second additive supply device is provided with a second powder bin and a second additive level meter, the second additive level meter is used to monitor the amount of additive in the second powder bin, and the second additive supply device is also equipped with an additive feeder and an additive meter to deliver the additive to the second stirring and conveying device.
9. The tail salt filling slurry preparation and delivery system according to claim 1, characterized in that: The tail salt filling slurry comprises the following components in parts by weight: 55-80% tail salt, 15-40% brine, and 1-10% additives; and / or The additive comprises at least one of quicklime, fly ash, cement and magnesium oxide, wherein the Cao content in the quicklime is not less than 80%; and / or The tailing salt is a tailing salt with a sodium chloride content of ≥95% produced in the process of potash ore dressing; and / or The brine is a solution containing 20-35% magnesium chloride produced in the process of potash ore dressing.
10. A method for preparing and conveying tail salt filling slurry, characterized in that: include: Supplying brine to the first stirring and conveying device by a brine supply device, and supplying tail salt to the first stirring and conveying device by a tail salt supply device; The first stirring and conveying device stirs the brine and the tail salt to obtain a brine tail salt slurry, and supplies the brine tail salt slurry to the buffer device; The buffer device is used to supply the brine tail salt slurry to the second stirring and conveying device, and the additive supply device is used to supply the additive to the second stirring and conveying device; The second stirring and conveying device stirs the brine tail salt slurry and the additive to obtain tail salt filling slurry, and conveys the tail salt filling slurry to a target position; wherein the distance between the second stirring and conveying device and the target position is smaller than the distance between the first stirring and conveying device and the target position.