A modified slag-based flood drainage system water-permeable rapid plugging method

Abstract

This invention discloses a rapid sealing method for permeable drainage systems based on modified slag, comprising the following steps: first, workers manually climb into the inclined channel to measure the distance to the permeable points; then, using a rubber boat inside the reservoir, the permeable points are initially located using GPS combined with the as-built drawings of the drainage system; finally, the wrapped slag is tightly adhered to the arch plate at the permeable points to achieve a sealing effect. The invention involves placing slag wrapped inside geotextile at deep-water permeable points. Utilizing the adsorption force of water at the permeable points, the microparticles within the slag are rapidly adsorbed by the 400g / m² geotextile, forming a closed, flexible surface layer.

Description

Technical Field

[0001] This invention relates to the field of mine tailings sealing technology, specifically to a rapid sealing method for permeable drainage systems based on modified slag. Background Technology

[0002] The existing sealing technology for mine tailings dam drainage systems involves using 400g / m2 geotextile bags to wrap boulders, gravel, coarse sand, and other materials in several sections for sealing. Multiple filter layers are then used to block the tailings. After the tailings are deposited and covered by the sediment, the water volume decreases over time, eventually achieving an impermeable effect.

[0003] The technical solution has the following shortcomings: 1. It is difficult to accurately locate specific water seepage points in the deep water area of ​​the tailings dam; 2. The process of sequentially filling geotextile bags with boulders, crushed stone, gravel, and coarse sand involves many steps, requiring a large amount of material for multiple filter layers; 3. It fails to achieve substantial watertight sealing. The reasons for these shortcomings are as follows: The tailings dam drainage system consists of drainage chutes and drainage tunnels, with water seepage generally occurring in the drainage chutes. Located in the deep water area at the tail of the dam, the drainage chutes can only be roughly located using surveying instruments. Furthermore, the drainage chutes are constructed by adding prefabricated arched slabs to control the water level according to production requirements. It is difficult to place the sealing material stably around the seepage point, especially on the curved surface of the arched slab, thus requiring a large quantity of different sealing materials. Moreover, the multiple filter layers formed by placing various bagged sealing materials can only isolate the tailings sand, but cannot prevent water seepage. This creates significant obstacles to the later inspection, troubleshooting, and operation of the drainage chutes. Therefore, this invention provides a rapid water seepage sealing method for mine tailings dam drainage systems. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a rapid sealing method for water permeability in flood discharge systems based on modified slag, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides a method for rapid sealing of water seepage in a mine tailings dam drainage system, comprising the following steps:

[0007] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0008] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0009] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0010] Preferably, the modified slag is prepared by:

[0011] S01: First, place the slag in a plasma box for irradiation treatment, then place it in a modification liquid for modification and stirring for 20-30 minutes. The stirring speed is 350-400 r / min and the stirring temperature is 55-65℃. Finally, wash with water and dry.

[0012] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them in a ball mill for 20-25 minutes at a speed of 500-1000 r / min. After ball milling, the modified slag is obtained.

[0013] Preferably, the modified solution is prepared by adding lanthanum nitrate to 2-3 times the amount of chitosan solution, then adding hydrochloric acid to adjust the pH to 5.5, and then adding 5-10% sodium alginate and 1-5% sodium alkyl sulfonate of the total amount of chitosan solution, stirring and mixing thoroughly to obtain the modified solution.

[0014] Preferably, the chitosan solution has a mass fraction of 10-15%.

[0015] Preferably, the stirring speed for thorough mixing is 1000-1500 r / min.

[0016] Preferably, the irradiation power of the plasma treatment in the plasma chamber is 100-150W, and the irradiation time is 20-30min.

[0017] Preferably, the preparation method of the bentonite agent is as follows: bentonite is fed into a calcining furnace and calcined for 20-30 minutes at a calcination temperature of 300-500℃. After calcination, it is cooled to 45-55℃ and then ultrasonically dispersed in 7-10 times its volume of water. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0018] Preferably, the power of the ultrasonic dispersion treatment is 100-300W, and the ultrasonic time is 20-30min.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention involves placing slag wrapped in geotextile at a deep-water permeable point. Utilizing the adsorption force of the water at the permeable point, the microparticles within the slag are rapidly adsorbed by the 400g / m² geotextile, forming a closed, flexible surface layer. The reason for using geotextile to wrap slag instead of other materials is that slag has a very low specific gravity and, when placed in deep water while wrapped in geotextile, will sink at a very low speed. The water pressure inside the reservoir is greater than the atmospheric pressure in the inclined channel, creating hydraulic pressure at the permeable point. As the wrapped slag approaches the permeable point, it will move towards it. Using other materials would make it difficult to control its sinking speed and displacement. Furthermore, the modified slag has optimized dispersion and specific surface area, improving the raw material utilization efficiency of the product. Attached Figure Description

[0021] Figure 1 The diagram shows the cross-section and longitudinal section analysis of the inclined chute.

[0022] Figure 2 This is a schematic diagram illustrating the process of locating permeable points in geotextile-wrapped slag according to the present invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0025] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0026] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0027] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0028] The method for preparing the modified slag in this embodiment is as follows:

[0029] S01: First, place the slag in a plasma box for irradiation treatment, then place it in a modification liquid for modification and stirring for 20-30 minutes. The stirring speed is 350-400 r / min and the stirring temperature is 55-65℃. Finally, wash with water and dry.

[0030] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them in a ball mill for 20-25 minutes at a speed of 500-1000 r / min. After ball milling, the modified slag is obtained.

[0031] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 2-3 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 5-10% sodium alginate and 1-5% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0032] The chitosan solution in this embodiment has a mass fraction of 10-15%.

[0033] In this embodiment, the stirring speed for thorough mixing is 1000-1500 r / min.

[0034] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 100-150W, and the irradiation time is 20-30min.

[0035] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 20-30 minutes at a calcination temperature of 300-500℃. After calcination, it is cooled to 45-55℃ and then ultrasonically dispersed in 7-10 times its volume of water. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0036] In this embodiment, the ultrasonic dispersion process uses a power of 100-300W and an ultrasonic time of 20-30 minutes.

[0037] Example 1:

[0038] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0039] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0040] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0041] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0042] The method for preparing the modified slag in this embodiment is as follows:

[0043] S01: The slag is first placed in a plasma box for irradiation treatment, then placed in a modification liquid for modification and stirring for 20 minutes at a stirring speed of 350 r / min and a stirring temperature of 55℃, and finally washed with water and dried.

[0044] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them in a ball mill for 20 minutes at a speed of 500 r / min. After the ball milling is completed, the modified slag is obtained.

[0045] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 2 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 5% sodium alginate and 1% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0046] The chitosan solution in this embodiment has a mass fraction of 10%.

[0047] In this embodiment, the stirring speed for thorough mixing is 1000 r / min.

[0048] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 100W, and the irradiation time is 20min.

[0049] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 20 minutes at a calcination temperature of 300°C. After calcination, it is cooled to 45°C and then placed in 7 times its volume of water for ultrasonic dispersion treatment. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0050] In this embodiment, the ultrasonic dispersion process uses a power of 100W and an ultrasonic time of 20min.

[0051] Example 2:

[0052] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0053] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0054] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0055] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0056] The method for preparing the modified slag in this embodiment is as follows:

[0057] S01: The slag is first placed in a plasma box for irradiation treatment, then placed in a modification liquid for modification and stirring for 30 minutes at a stirring speed of 400 r / min and a stirring temperature of 65℃, and finally washed with water and dried.

[0058] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them for 25 minutes at a speed of 1000 r / min. After the ball milling is completed, the modified slag is obtained.

[0059] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 3 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 10% sodium alginate and 5% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0060] The chitosan solution in this embodiment has a mass fraction of 15%.

[0061] In this embodiment, the stirring speed for thorough mixing is 1500 r / min.

[0062] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 150W, and the irradiation time is 30min.

[0063] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 30 minutes at a calcination temperature of 500°C. After calcination, it is cooled to 55°C and then placed in 10 times its volume of water for ultrasonic dispersion treatment. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0064] In this embodiment, the ultrasonic dispersion process uses a power of 300W and an ultrasonic time of 30min.

[0065] Example 3:

[0066] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0067] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0068] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0069] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0070] The method for preparing the modified slag in this embodiment is as follows:

[0071] S01: The slag is first placed in a plasma box for irradiation treatment, then placed in a modification liquid for modification and stirring for 25 minutes at a stirring speed of 370 r / min and a stirring temperature of 60℃, and finally washed with water and dried.

[0072] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them for 22 minutes at a speed of 750 r / min. After the ball milling is completed, the modified slag is obtained.

[0073] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 2.5 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 7.5% sodium alginate and 3% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0074] The chitosan solution in this embodiment has a mass fraction of 12.5%.

[0075] In this embodiment, the stirring speed for thorough mixing is 1250 r / min.

[0076] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 125W, and the irradiation time is 25min.

[0077] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 25 minutes at a calcination temperature of 400°C. After calcination, it is cooled to 50°C and then placed in 8 times its volume of water for ultrasonic dispersion treatment. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0078] In this embodiment, the ultrasonic dispersion process uses a power of 200W and an ultrasonic time of 25 minutes.

[0079] Example 4:

[0080] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0081] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0082] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0083] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0084] The method for preparing the modified slag in this embodiment is as follows:

[0085] S01: The slag is first placed in a plasma box for irradiation treatment, then placed in a modification liquid for modification and stirring for 22 minutes at a stirring speed of 360 r / min and a stirring temperature of 57℃, and finally washed with water and dried.

[0086] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them for 22 minutes at a speed of 600 r / min. After the ball milling is completed, the modified slag is obtained.

[0087] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 2.2 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 6% sodium alginate and 2% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0088] The chitosan solution in this embodiment has a mass fraction of 12%.

[0089] In this embodiment, the stirring speed for thorough mixing is 1200 r / min.

[0090] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 120W, and the irradiation time is 22min.

[0091] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 22 minutes at a calcination temperature of 320°C. After calcination, it is cooled to 46°C and then placed in 8 times its volume of water for ultrasonic dispersion treatment. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0092] In this embodiment, the ultrasonic dispersion process uses a power of 120W and an ultrasonic time of 22min.

[0093] Example 5:

[0094] This embodiment of a method for rapid sealing of permeable drainage systems based on modified slag includes the following steps:

[0095] Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point.

[0096] Step 2: In the area initially identified by GPS, use acrylic thread to tie 400g / m2 geotextile wrapped with modified slag. After tying the acrylic thread, leave an appropriate length and tie an empty mineral water bottle at the water surface inside the reservoir.

[0097] Step 3: The technician, on the rubber boat in the positioning area, precisely locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect.

[0098] The method for preparing the modified slag in this embodiment is as follows:

[0099] S01: The slag is first placed in a plasma box for irradiation treatment, then placed in a modification liquid for modification and stirring for 28 minutes at a stirring speed of 390 r / min and a stirring temperature of 62℃, and finally washed with water and dried.

[0100] S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them for 23 minutes at a speed of 980 r / min. After the ball milling is completed, the modified slag is obtained.

[0101] The modified solution in this embodiment is prepared as follows: Lanthanum nitrate is added to 2.8 times the amount of chitosan solution, then hydrochloric acid is added to adjust the pH to 5.5, and then 8% sodium alginate and 4% sodium alkyl sulfonate of the total amount of chitosan solution are added. The mixture is stirred and mixed thoroughly to obtain the modified solution.

[0102] The chitosan solution in this embodiment has a mass fraction of 14%.

[0103] In this embodiment, the stirring speed for thorough mixing is 1450 r / min.

[0104] In this embodiment, the irradiation power of the plasma chamber irradiation treatment is 145W, and the irradiation time is 28in.

[0105] The preparation method of the bentonite agent in this embodiment is as follows: Bentonite is fed into a calcining furnace and calcined for 28 minutes at a calcination temperature of 450°C. After calcination, it is cooled to 48°C and then placed in 9 times its volume of water for ultrasonic dispersion treatment. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

[0106] In this embodiment, the ultrasonic dispersion process uses a power of 280W and an ultrasonic time of 28min.

[0107] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0108] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for rapid sealing of permeable drainage systems based on modified slag, characterized in that, Includes the following steps: Step 1: First, manually climb into the inclined channel to measure the distance to the permeable point. Then, use a rubber boat inside the reservoir and GPS combined with the as-built drawings of the flood discharge system to initially locate the permeable point. Step two: in the GPS preliminary set for the area with acrylic yarn binding 400g / m 2 Modified slag in geotextile, after binding with acrylic yarn, the corresponding length should be left, and an empty mineral water bottle is tied at the water surface in the warehouse. Step 3: The technician, on the rubber boat in the positioning area, accurately locates the end of the plastic bottle by feeling the acrylic thread with his hand. When traction is generated, the water seepage point is found. The empty plastic bottle is then disconnected, and the wrapped slag adheres tightly to the arch plate to achieve a sealing effect. The method for preparing the modified slag is as follows: S01: First, place the slag in a plasma box for irradiation treatment, then place it in a modification liquid for modification and stirring for 20-30 minutes. The stirring speed is 350-400 r / min and the stirring temperature is 55-65℃. Finally, wash with water and dry. S02: Mix the slag and bentonite agent at a weight ratio of 10:3, and then ball mill them in a ball mill for 20-25 minutes at a speed of 500-1000 r / min. After ball milling, the modified slag is obtained. The modified solution is prepared by adding lanthanum nitrate to 2-3 times the amount of chitosan solution, then adding hydrochloric acid to adjust the pH to 5.5, followed by adding 5-10% sodium alginate and 1-5% sodium alkyl sulfonate of the total amount of chitosan solution, stirring and mixing thoroughly to obtain the modified solution.

2. The method for rapid sealing of permeable drainage systems based on modified slag according to claim 1, characterized in that, The chitosan solution has a mass fraction of 10-15%.

3. The method for rapid sealing of permeable drainage systems based on modified slag according to claim 1, characterized in that, The stirring speed for thorough mixing is 1000-1500 r / min.

4. The method for rapid sealing of permeable drainage systems based on modified slag according to claim 1, characterized in that, The irradiation power of the plasma treatment in the plasma chamber is 100-150W, and the irradiation time is 20-30min.

5. The method for rapid sealing of permeable drainage systems based on modified slag according to claim 1, characterized in that, The method for preparing the bentonite agent is as follows: Bentonite is fed into a calcining furnace and calcined for 20-30 minutes at a calcination temperature of 300-500℃. After calcination, it is cooled to 45-55℃ and then ultrasonically dispersed in 7-10 times its volume of water. After ultrasonic treatment, it is washed with water and dried to obtain the bentonite agent.

6. The method for rapid sealing of permeable drainage systems based on modified slag according to claim 5, characterized in that, The ultrasonic dispersion process uses a power of 100-300W and an ultrasonic time of 20-30 minutes.

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