Broad-spectrum, multi-domain, high-capacity intelligent storage thickener and its thickening process

Abstract

The present invention provides a broad-spectrum, multi-domain, large-capacity intelligent storage thickener and its thickening process, the thickener includes a bin, a multi-in-one new tailings slurry feeding structure arranged above the bin, a sand inlet pipe for connecting the tailings slurry of the concentrator with the multi-in-one new tailings slurry feeding structure, an intelligent monitoring device connected to the sand inlet pipe, and a sand discharge pipe connected to the bin. By drawing on the advantages of deep cone thickeners and paste storage thickeners, the present invention develops a new broad-spectrum, multi-domain, large-capacity intelligent storage thickener. The top center barrel of the thickener adopts a multi-in-one new tailings slurry feeding structure design, combined with flocculant multi-point atomization spraying technology, to achieve full combination of multi-scale particle size tailings molecules, large-scale concentration feed tailings slurry molecules and flocculant molecules, effectively shortening the tailings flocculation and sedimentation time; a compressed air drainage device is provided at the bottom of the bin, and high-pressure air is used to clear the flocculent water guide channel to achieve high-concentration steady-state continuous sand discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of mine tailings filling, and in particular to a broad-spectrum, multi-domain, large-capacity intelligent storage thickener and a thickening process thereof. Background Art

[0002] Mineral resources are important raw materials for the national economy and national defense industry. According to the current ore grade and mineral processing technology, about 8 tons of tailings are produced for every ton of concentrate produced. If the tailings discharge is not solved, it will lead to ecological imbalance. Therefore, tailings discharge has become a technical problem that restricts the long-term development of mines. The backfill mining method has been widely used in the mining field due to its own emission reduction and safety performance, but some technical equipment bottlenecks still need to be further overcome. At present, the deep cone thickener is one of the core equipment for tailings thickening in mines at home and abroad, with a market share of more than 70%. For example, the deep cone paste thickener developed by Denmark Smith and Finland Outotec is currently the most advanced paste preparation and concentration equipment in the world. Its pulping concentration can reach 60%-70%, and the concentration fluctuation is greater than 3%. The deep cone thickener developed by Feiyi Co., Ltd. and Sino-Finnish Mining Machinery Co., Ltd. has a pulping concentration range of 55%-65%, and a concentration fluctuation of more than 5%. Since the deep cone thickener uses an electrically driven rake to disturb and release sand, the equipment has high energy consumption, small tailings processing capacity, is greatly affected by the tailings slurry concentration and tailings particle size of the concentrator, cannot be reliably cached, and cannot solve the time and space contradictions of mining, concentrating and filling in mines.

[0003] Traditional tailings thickening equipment includes deep cone thickeners, high-efficiency thickeners and vertical sand bins. The main filling process is as follows: the tailings slurry with a mass concentration of 30% to 40% from the concentrator is pumped to the sand bin or deep cone thickener of the filling preparation station, flocculated and concentrated to a higher concentration, and then discharged into the mixing system, mixed with the cementitious material to form a filling slurry that meets the requirements, and then delivered to the filling site by gravity or pumping through the borehole and underground filling pipeline. After long-term use, we found that the above-mentioned tailings thickening equipment basically has the following problems: (1) In order to meet the tailings processing capacity requirements, large-sized thickening equipment (generally 30m in diameter) is often used. Due to the large size and heavy load of the thickener and sand bin, the equipment foundation requirements are relatively high. The investment in the civil engineering part of the thickener is often large, which greatly increases the investment in the filling system construction and the filling station construction period. (2) In order to prevent the tailings from compacting in the bin, traditional thickeners generally use an electric-driven rake-type disturbance structure to release sand. On the one hand, it consumes a lot of energy (high-power rakes run continuously), and on the other hand, it has poor adaptability to materials. It is generally only suitable for fine-grained tailings, but there is a risk of rake compression for coarse-grained tailings, and it cannot be reliably cached, so it is not suitable for filling in small mining areas. In addition, traditional thickeners are greatly affected by the fluctuations of the amount of sand and the concentration of the sand coming from the concentrator because of the continuous sand feeding and continuous sand release. This will directly affect the amount of sand released from the bin bottom and the concentration, thereby affecting the quality of the filling slurry preparation, which will be extremely detrimental to underground safety and civilized production. (3) For mines that adopt the vertical sand bin filling process, in order to meet the requirements of continuous sand feeding in the concentrator, it is often necessary to build multiple vertical sand bins, which not only occupies a large area, but also the investment in the filling system is often higher, and the equipment is scattered, which is not conducive to centralized management; during the filling operation, the degree of automation and intelligence is low, and the number of personnel required is large, which does not conform to the development trend of "automation to reduce manpower, intelligence to reduce manpower" in green mines.

[0004] The existing paste storage thickener has a flat bottom structure, and with the application on site, there are also some problems: (1) The sedimentation efficiency of tailings particles is reduced. The flat bottom structure limits the natural sedimentation process of solid particles, resulting in a slow sedimentation rate. (2) It is greatly affected by the concentration of the tailings slurry in the concentrator, because the concentration of the tailings slurry is about 10% when the flocculant exerts the best flocculation effect, while the concentration of the incoming material in the concentrator is often 20% to 40%, resulting in unstable flocculation effect. (3) The tailings particles are unevenly stacked. The flat bottom structure may cause the tailings particles to accumulate unevenly at the bottom, resulting in slight local compaction of the tailings, which reduces the stability of the equipment. (4) The tailings processing capacity is small. For large-scale mine filling, the single center barrel limits the incoming flow rate of the tailings slurry in the concentrator, affecting the thickener's processing capacity for tailings. (5) The cross-domain adaptability is poor. Due to the limitation of the flocculation effect, it is poorly applicable to low-concentration slurries in some other fields.

[0005] In view of this, it is necessary to design an improved broad-spectrum, multi-domain, large-capacity intelligent storage thickener and its thickening process to solve the above problems. Summary of the invention

[0006] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a broad-spectrum, multi-domain, large-capacity intelligent storage thickener and its thickening process, so as to solve the technical problems of traditional tailings thickening equipment such as low thickening efficiency, high energy consumption, small range of sand input concentration, large fluctuation of sand discharge concentration, small tailings processing capacity, inability to achieve reliable storage, and poor cross-domain adaptability.

[0007] To achieve the above-mentioned objectives, the present invention provides a broad-spectrum, multi-domain, large-capacity intelligent storage-type thickener, comprising a silo body, and also comprising a multi-in-one new tailings slurry feeding structure arranged above the silo body, a sand inlet pipe for connecting the tailings slurry of the concentrator plant with the multi-in-one new tailings slurry feeding structure, an intelligent monitoring device connected to the sand inlet pipe, and a sand discharge pipe connected to the silo body; the multi-in-one new tailings slurry feeding structure comprises a main center barrel arranged in the middle and a plurality of regional center barrels connected to the main center barrel, and the regional center barrels are arranged around the main center barrel.

[0008] As a further improvement of the present invention, the number of the regional center barrels is three, and the distribution pattern is equidistant distribution.

[0009] Furthermore, a dilution pipe is arranged around the central barrel of the region, one end of the dilution pipe is located in the central barrel of the region, and the other end is located below the clear water level in the clarification area outside the central barrel of the region.

[0010] As a further improvement of the present invention, the sand discharge pipe is arranged at the bottom of the warehouse body.

[0011] As a further improvement of the present invention, the intelligent monitoring device includes a flow meter and a concentration meter, which are used to detect the flow rate and concentration of the tailings slurry incoming from the concentrator.

[0012] As a further improvement of the present invention, the broad-spectrum, multi-domain, large-capacity intelligent storage-type thickener also includes a compressed air drainage device arranged on the inner side of the bottom of the warehouse body.

[0013] Furthermore, the compressed air drainage device includes a coil surrounding the bottom of the warehouse body, which prevents the tailings from compacting by inputting high-pressure air.

[0014] The present invention also provides a thickening process using the above-mentioned broad-spectrum, multi-domain, large-capacity intelligent storage thickener, comprising the following steps:

[0015] S1. The tailings slurry of the concentrator enters the main center barrel of the broad-spectrum, multi-domain, large-capacity intelligent storage thickener through the sand inlet pipe. The flocculant is added to the main center barrel through the flocculant multi-point atomization spray system for flocculation and sedimentation.

[0016] S2. Monitor the incoming flow and concentration of tailings slurry in the concentrator through intelligent monitoring devices, control the opening / closing of the connecting valves of the central barrels in each area according to the monitoring data, and divert the mixed fluid in the main central barrel to the central barrels in each area;

[0017] S3. After flocculation and sedimentation, the mixed fluid in the central barrel of each area flows into the bin from the outlet at the bottom of the central barrel to continue sedimentation. High-pressure air is input through the compressed air drainage device to clear the flocculent water guide channel, and sand is released through the sand release pipe at the bottom of the bin.

[0018] As a further improvement of the present invention, in step S1, the incoming concentration of the tailings slurry of the dressing plant is 3% to 50%; in step S3, the concentration of the discharged sand is ≥65%.

[0019] The beneficial effects of the present invention are:

[0020] (1) The present invention sets a new multi-in-one tailings slurry feeding structure above the silo, including a main center barrel and several regional center barrels connected to the main center barrel, draws on the advantages of high-efficiency thickening of deep cone thickeners and large-capacity and reliable storage of paste storage thickeners, develops a new type of broad-spectrum, multi-domain, large-capacity intelligent storage thickener, combines flocculant multi-point atomization spraying technology, realizes the full combination of multi-scale particle size tailings molecules, large-scale concentration feed tailings slurry molecules and flocculant molecules, and effectively shortens the tailings flocculation and sedimentation time. By setting a compressed air drainage device at the bottom of the silo, high-pressure air is used to clear the flocculent water guide channel, prevent the tailings from compacting in the silo, and achieve high-concentration steady-state continuous sand discharge.

[0021] (2) The broad-spectrum, multi-domain, large-capacity intelligent storage thickener provided by the present invention adopts a multi-in-one new tailings slurry feeding structure design. By diverting multi-scale particle size tailings molecules, large-scale concentration tailings slurry molecules and flocculant molecules to multiple central barrels, the surface area for treatment can be increased. More surface area helps to more effectively separate water molecules and tailings molecules, improve the concentration efficiency, and at the same time, it can prolong the retention time of tailings in the central barrel, so that the tailings molecules and flocculant molecules are fully combined. Without the use of overflow water forced dilution system, the flocculation effect is better, thereby improving the overall processing capacity. At the same time, the multi-in-one design of the central barrel helps to improve the fluid dynamics of the slurry. Through the multi-stage flow diversion device, the tailings slurry is diverted in the central barrels of multiple regions, so that the flow rate is gradually slowed down, which helps to better precipitate solid particles and improve the separation process. This advantage helps to improve the sorting effect and reduce the drag of fine particles.

[0022] (3) The present invention effectively controls the flow rate of the tailings slurry and the amount of flocculant added in the multi-stage processing through a multi-level intelligent control system, ensuring that the tailings "in-out" is in dynamic balance, which helps to improve the stability of the thickener and reduce fluctuations in operation, thereby improving the overall reliability and ensuring the extreme high-concentration steady-state sand release of the thickener.

[0023] (4) The broad-spectrum, multi-domain, large-capacity intelligent storage thickener provided by the present invention can not only be used for the thickening of multi-scale particle size tailings molecules and large-scale concentration tailings slurry molecules in the mining industry, but also has significant thickening effects in the fields of sand and gravel aggregates, sewage treatment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the broad-spectrum, multi-domain, large-capacity intelligent storage thickener of the present invention.

[0025] Figure 2 It is a cross-sectional view of the new multi-in-one tailings slurry feeding structure of the broad-spectrum, multi-domain, large-capacity intelligent storage-type thickener of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the regional central barrel of the broad-spectrum, multi-domain, large-capacity intelligent storage-type thickener of the present invention.

[0027] Reference numerals

[0028] 1-bin; 2-sand inlet pipe; 3-sand discharge pipe; 4-main center barrel; 5-regional center barrel; 6-connecting valve; 7-dilution pipeline; 8-discharge outlet. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0031] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes 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 apparatus.

[0032] See also Figures 1 to 3As shown, the present invention provides a broad-spectrum, multi-domain, large-capacity intelligent storage thickener, comprising a bin body 1, a multi-in-one new tailings slurry feeding structure arranged above the bin body 1, a sand inlet pipe 2 for connecting the tailings slurry of the concentrator and the multi-in-one new tailings slurry feeding structure, an intelligent monitoring device connected to the sand inlet pipe 2, and a sand discharge pipe 3 connected to the bin body 1. The bottom of the bin body 1 is an inner cone structure, which can enable the mixed fluid to generate a large centrifugal force in the thickener and quickly deposit the solid particles to the bottom of the cone, thereby improving the solid-liquid separation efficiency.

[0033] The new multi-in-one tailings slurry feeding structure comprises a main central barrel 4 arranged in the middle and a plurality of regional central barrels 5 connected to the main central barrel 4 , wherein the regional central barrels 5 are arranged around the main central barrel 4 .

[0034] In some embodiments of the present invention, the number of regional central barrels 5 is three, and the distribution is equidistant. A dilution pipe 7 is arranged around the regional central barrel 5, one end of the dilution pipe 7 is located inside the regional central barrel 5, and the other end is located below the clear water level in the clarification area outside the regional central barrel 5. With such an arrangement, multi-scale particle size tailings molecules, large-scale concentration tailings slurry molecules and flocculant molecules can be diverted to multiple regional central barrels 5, increasing the surface area for treatment. More surface area helps to more effectively separate water molecules and tailings molecules, improve concentration efficiency, and at the same time prolong the retention time of tailings in the regional central barrel 5, so that the tailings molecules are fully combined with the flocculant molecules. Without using the overflow water forced dilution system, the flocculation effect is better, thereby improving the overall treatment capacity.

[0035] The intelligent monitoring device includes a flow meter and a concentration meter, which are used to detect the incoming flow and concentration of the tailings slurry in the concentrator. Combined with the measured tailings particle size, the connecting valve 6 of the central barrel 5 in each area can be controlled to open / close. By controlling the residence time of the tailings slurry in the central barrel 5 of the area, the tailings flocculation and sedimentation effect is optimized and the overflow water is clarified. (The intelligent monitoring device is a commonly used device in the prior art. Figure 1 Not shown.)

[0036] The sand discharge pipe 3 is arranged outside the bottom of the silo 1, and a compressed air drainage device is arranged inside the bottom of the silo 1. The compressed air drainage device includes a coil surrounding the bottom of the silo and a high-pressure pumping pipeline connected to the coil. The coil is provided with a nozzle, and high-pressure air is used to clear the flocculent water channel to prevent the tailings from compacting and realize high-concentration steady-state continuous sand discharge. (The compressed air drainage device is a commonly used device in the prior art. Figure 1 Not shown.)

[0037] The present invention also provides a thickening process using the above-mentioned broad-spectrum, multi-domain, large-capacity intelligent storage thickener, comprising the following steps:

[0038] S1, the tailings slurry of the concentrator enters the main center barrel 4 of the broad-spectrum multi-domain large-capacity intelligent storage thickener through the sand inlet pipe 2, and the flocculant is added to the main center barrel 4 through the flocculant multi-point atomization spray system for flocculation and sedimentation;

[0039] S2. Monitor the incoming flow and concentration of tailings slurry in the concentrator through an intelligent monitoring device, and control the opening / closing of the connecting valve 6 of the central barrel 5 in each area according to the monitoring data, so as to divert the mixed fluid in the main central barrel 4 to the central barrels 5 in each area;

[0040] S3. After flocculation and sedimentation, the mixed fluid in the central barrel 5 of each area flows into the bin from the discharge port 8 at the bottom of the central barrel 5 of the area to continue sedimentation. High-pressure air is input through the compressed air drainage device to clear the flocculent water guide channel, and sand is released through the sand release pipe 3 at the bottom of the bin.

[0041] Specifically, the tailings slurry of the concentrator is pumped to the main central barrel 4 of the broad-spectrum multi-domain intelligent paste storage thickener of the filling station, and the tailings slurry is treated by adding flocculants to achieve rapid solid-liquid separation. The tailings slurry wrapped by flocs enters the central barrels 5 of each region, and finally enters the inside of the thickener. Since the top central barrel of the thickener adopts a multi-in-one new tailings slurry feeding structure design, the connecting valve 6 of the central barrel 5 of each region can be controlled to open / close by intelligently monitoring the incoming flow and concentration of the tailings slurry of the concentrator, and combining the measured tailings particle size, and by controlling the residence time of the tailings slurry in the regional central barrel 5, the tailings flocculation and sedimentation effect is optimized and the overflow water is clarified.

[0042] In the above steps, the tailings slurry incoming material concentration range of the broad-spectrum, multi-domain, large-capacity intelligent storage thickener is 3% to 50%.

[0043] Practice has shown that compared with the existing paste storage thickener, the energy consumption of the equipment of the present invention is reduced by more than 30%, the sand concentration is ≥65%, and the concentration fluctuation is ≤±2%; the tailings processing capacity is ≥1.2t / m 2 / h, filling slurry seepage rate ≤3%; tailings storage capacity ≥600t, and reliable storage time ≥3d, which solves the time and space contradiction of mining-selection-filling; it has strong cross-domain adaptability and is suitable for industries such as mine tailings, sand and gravel aggregates and sewage treatment.

[0044] The existing paste storage thickener has a single central barrel that limits the incoming flow of the tailings slurry from the concentrator, affecting the thickener's ability to handle tailings. Since the contact time between tailings molecules and flocculant molecules is short in a single central barrel, it cannot ensure that all tailings slurry molecules are wrapped by flocculant molecules, affecting the flocculation and sedimentation effect; when the tailings slurry feed concentration fluctuates greatly, the amount of flocculant cannot be accurately adjusted, resulting in more or less flocculant usage, affecting the flocculant effect, causing overflow water to mix with tailings and compact inside the thickener.

[0045] In summary, the broad-spectrum, multi-domain, large-capacity intelligent storage thickener and its thickening process of the present invention, through the multi-position integrated design of the central barrel, make the tailings slurry incoming material concentration distribution range wider and the tailings processing capacity greater. It not only effectively shortens the thickening time, but also is conducive to high-concentration steady-state sand release. It can be used for the thickening of multi-scale particle size tailings molecules and large-scale concentration tailings slurry molecules in the mining industry, and the thickening effect is still significant in the fields of sand and gravel aggregates, sewage treatment, etc.

[0046] It should be noted that, although the number of regional center buckets in the present invention is three, the number of regional center buckets can be adjusted according to actual needs as long as the effect of the present invention can be achieved, and all of them belong to the protection scope of the present invention.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A broad-spectrum, multi-domain, large-capacity intelligent storage thickener, comprising a storage body, characterized in that: It also includes a multi-in-one tailings slurry feeding structure arranged above the silo body, a sand inlet pipe for connecting the tailings slurry of the concentrator and the multi-in-one tailings slurry feeding structure, an intelligent monitoring device connected to the sand inlet pipe, and a sand discharge pipe connected to the silo body; the multi-in-one tailings slurry feeding structure includes a main center barrel arranged in the middle and a plurality of regional center barrels connected to the main center barrel, and the regional center barrels are arranged around the main center barrel; the intelligent monitoring device is used to monitor the incoming flow rate and concentration of the tailings slurry of the concentrator, and the connecting valves of each regional center barrel are controlled to open / close according to the monitored data, so as to divert the mixed fluid in the main center barrel to each regional center barrel.

2. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 1 is characterized in that: The number of the regional center barrels is three, and the distribution pattern is equidistant distribution.

3. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 2 is characterized in that: A dilution pipeline is arranged around the central barrel of the area.

4. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 3 is characterized in that: One end of the dilution pipeline is located in the central barrel of the region, and the other end is located below the clear water level in the clarification area outside the central barrel of the region.

5. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 1 is characterized in that: The sand placing pipe is arranged at the bottom of the warehouse body.

6. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 1, characterized in that: The intelligent monitoring device comprises a flow meter and a concentration meter, which are used to detect the incoming flow and concentration of tailings slurry of the concentrator.

7. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 1, characterized in that: The broad-spectrum, multi-domain, large-capacity intelligent storage-type thickener also includes a compressed air drainage device arranged on the inner side of the bottom of the warehouse body.

8. The broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 7, characterized in that: The compressed air drainage device includes a coil surrounding the bottom of the bin body, and prevents the tailings from compacting by inputting high-pressure air.

9. A thickening process using the broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. The tailings slurry of the concentrator enters the main center barrel of the broad-spectrum, multi-domain, large-capacity intelligent storage thickener through the sand inlet pipe. The flocculant is added to the main center barrel through the flocculant multi-point atomization spray system for flocculation and sedimentation. S2. Monitor the incoming flow and concentration of tailings slurry in the concentrator through intelligent monitoring devices, control the opening / closing of the connecting valves of the central barrels in each area according to the monitoring data, and divert the mixed fluid in the main central barrel to the central barrels in each area; S3. After flocculation and sedimentation, the mixed fluid in the central barrel of each area flows into the bin from the outlet at the bottom of the central barrel to continue sedimentation. High-pressure air is input through the compressed air drainage device to clear the flocculent water guide channel, and sand is released through the sand release pipe at the bottom of the bin.

10. The thickening process of the broad-spectrum, multi-domain, large-capacity intelligent storage thickener according to claim 9, characterized in that: In step S1, the incoming concentration of the tailings slurry from the dressing plant is 3% to 50%; in step S3, the concentration of the discharged sand is ≥65%.

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