CN107350094B - Self-rotational flow tailing desliming equipment and method - Google Patents
Self-rotational flow tailing desliming equipment and method Download PDFInfo
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- CN107350094B CN107350094B CN201710668247.4A CN201710668247A CN107350094B CN 107350094 B CN107350094 B CN 107350094B CN 201710668247 A CN201710668247 A CN 201710668247A CN 107350094 B CN107350094 B CN 107350094B
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Abstract
The invention provides spin flow tailing desliming equipment and a spin flow tailing desliming method, wherein the spin flow tailing desliming equipment comprises a barrel body with a cone bottom, and a discharge port is arranged on the cone bottom. The method has the advantages that the ore dressing yield and the desliming efficiency are improved, the energy consumption is low, the cost is low, the solid mud in the mud flow can be collected intensively for backfilling, the upper water after precipitation can be reused, no secondary pollution is caused, the ore dressing efficiency after desliming can be greatly improved by 60% -80%, the purity of the obtained composite ore sand is high, no additive is added in the desliming process, the natural treatment is carried out, the pollution is not caused to the environment, the desliming process links for determining the mining efficiency and the cost in the tailings mining are solved, and the technical support is provided for the tailings mining of nonferrous metals.
Description
Technical Field
The invention relates to tailing desliming equipment, in particular to equipment for efficiently removing soil impurities in various tailings, and belongs to the technical field of tailing treatment.
Technical Field
The continuous development and utilization of various mineral resources greatly promote the development of economy, but various tailings with the number of trillion tons are piled up in each land, so that the method not only occupies a large land, but also becomes one of environmental pollution. These tailings, although deposited as waste at the time, have been tested to contain significant amounts of valuable components in such large quantities of waste, sometimes referred to as "artificial deposits". With the progress and development of technology and the increasing depletion of ore resources, the grade of the selected raw ore is lower and lower, and the grade of the selected raw ore is close to or even lower than that of useful components in tailings, so that whether the tailings can be used as a succession resource or the mine tailings can be used as a secondary resource for development and utilization has attracted great importance, and especially the progress of the reuse of the mine tailings is faster at the present of the rising price of nonferrous metals, the modern dressing and smelting technology, especially the fine grain dressing and the great progress of the smelting technology of low-content metal materials.
Most of the tailings are accompanied by a plurality of components. Taking tin as an example, the tin ore in a single form only accounts for 12% of the total reserve in China, the tin ore with tin as main metal accounts for 66%, the tin ore with tin as an accompanying component accounts for 22%, and metals symbiotic or accompanying with tin are as follows: copper, lead, zinc, tungsten, antimony, molybdenum, bismuth, silver, niobium, tantalum, beryllium, indium, gallium, germanium, chromium, iron, sulfur, arsenic, fluorite, and the like. According to the statistics, the average tin ore in the old market of Yunnan province contains more than 2 tons of metals such as lead, zinc, copper, bismuth, tungsten, molybdenum and the like per ton of tin, and the majordomo tin-zinc ore copper in the Yunnan province contains more than 21 tons of minerals such as zinc, copper, sulfur, arsenic and the like per ton of tin, and the tin ore in the Guangxi province contains a large amount of minerals such as lead, zinc, antimony, copper, tungsten, mercury and the like per ton of tin. The comprehensive recovery level of the current symbiotic or concomitant valuable element tailings in China is still very low, the comprehensive utilization rate of the valuable elements reaches 75 percent, the concentration plants only account for 2 percent of the total number, and a large amount of valuable elements remain in the tailings. Meanwhile, the refractory residual sand ore with high iron content is taken as the main material in the ore resources of China, and 95 percent is a polymetallic sulfide ore deposit, which belongs to comprehensive ores containing various symbiotic and associated useful elements or components, and compared with similar ores in other countries, the problems of low average grade, fine granularity of the colored ores, more associated minerals, complex components, close symbiotic relationship and the like exist, so that the development and utilization difficulty of the colored ores in China is far greater than that in other countries. In addition, the mining levels of the mines in China are uneven, the utilization rate of symbiotic and associated metal resources is low, some small and medium-sized mines are mined in a single development mode, other modes are discarded, only conventional and valuable tin, lead, zinc and the like are recovered, and minerals which are difficult to recover or have low value are lost in tailings. Therefore, the mine tailings in China have more valuable metal content and huge potential value. If more than 30 tailing ponds exist in the cloud tin company, more than 2 hundred million tons of tailings are piled up, the tin content is about 0.18%, the iron content is very rich and is 100 times more than the tin metal content, and according to the current production capacity, the piled tailings can be produced by the cloud tin company for more than 25 years; and the cloud tin tailings also have a certain amount of useful components such as copper, silver, lead, zinc, arsenic, bismuth and the like in a symbiotic manner, and have great comprehensive utilization value. Tens of millions of tailings are accumulated in Guangxi Plumbum Preparatium for over 50 years, and the tailings are mainly concentrated in 3 zones of factories, car rivers and mango fields, and because the recovery indexes of most factories are low, the loss of fine-grain-grade metals in the tailings is serious, the tailings still contain various recyclable minerals such as tin, lead, zinc, antimony, arsenic, sulfur and the like, and only the tin metal in the tailings of the factories reaches 10 ten thousand tons, the zinc copper metal reaches 50 ten thousand tons, the lead antimony metal reaches 12 ten thousand tons, and also pyrrhotite, pyrite, poison sand and the like. The Hunan persimmon bamboo garden ore is called as a 'world nonferrous metal museum', the ore is called as tungsten-tin polymetallic ore, but tin is not produced in the early stage, the 3 # ore body which is produced by the ore is not ideal, the comprehensive utilization of symbiotic ore is also not ideal, the prior attack research is only considered from how to reduce tin in tungsten concentrate, the utilization problem of refractory tin resources is not considered at all, and metal tin with the number of 10 ten thousand tons enters a tailing pond. The lead-zinc-tin polymetallic ore in east city belonging to persimmon bamboo garden ore has the tin content of tailings after lead-zinc separation as high as 2.5 percent, and is not comprehensively recycled.
It is obvious that the mine tailing resources in China have huge comprehensive utilization potential, but the tailings have high mud content of 40-60% and complex components, and the traditional desliming process equipment has low efficiency and extremely high cost. Therefore, in the big background of increasingly depleted mineral resources, in order to ensure the sustainable development of the colored industry in China, it is necessary to research and develop new desliming equipment to improve the grade and the beneficiation efficiency.
Disclosure of Invention
The invention provides spin flow desliming equipment with high desliming efficiency, low energy consumption and low cost, which aims to solve the defects of low efficiency and high cost of a tailing desliming process.
The invention also provides a desliming method based on the spin flow tailing desliming equipment.
The invention is completed by the following technical scheme: the spin flow tailing desliming equipment comprises a bucket body with a cone bottom, wherein an ore discharge port is arranged on the cone bottom, and is characterized in that a feeding port is tangentially arranged on the bucket body, a spin-separating slow flow mechanism is arranged at the bottom of the bucket body, a gap is kept between the bottom of the spin-separating slow flow mechanism and the cone bottom of the bucket body, an overflow port is arranged at the upper end of the bucket body, an overflow groove is arranged at the periphery of the overflow port, the overflow groove is connected with the overflow pipe, so that after tailing pulp is tangentially fed into the bucket body, a part of tailing pulp forms a rotational flow at the center of the bucket body, and under the action of the spin-separating slow flow mechanism, the mineral with large mass sinks to the cone bottom by self weight, and after the other part of tailing pulp collides with the spin-separating slow flow mechanism, the mineral with large mass sinks to the cone bottom by self weight, finally the mineral with the ore discharge port at the cone bottom is discharged to obtain primary useful mineral pulp, and the rest tailing pulp overflows into the overflow groove through the overflow port at the upper end of the bucket body and is discharged through a slurry discharge pipe.
The cyclone separation and flow buffer mechanism comprises a hollow barrel body in the middle, the top and the bottom of the hollow barrel body are opened, a plurality of spiral buffer vertical plates are arranged at intervals on the periphery of the hollow barrel body, the outer end of each buffer vertical plate is fixed on the wall of the barrel body, the inner end of each buffer vertical plate keeps a gap with the hollow barrel body, and the height of each buffer vertical plate is lower than the central line of a tangential feed inlet of the barrel body, so that the entering tailing slurry is divided into two parts of cyclone flow on the upper part and slow flow on the lower part through the cyclone separation and flow buffer mechanism, and the desliming efficiency and the grade of useful minerals are improved.
The barrel body is sequentially provided with a plurality of bottom and top connected, the cone bottom ore discharge port of the upper barrel body is connected with the tangential feed port of the lower barrel body through an ore discharge pipe, and after at least two-stage desliming is formed, primary minerals are discharged through the cone bottom ore discharge port of the lower barrel body; and overflow pipes of overflow grooves of at least two barrels on the upper part are connected with the shunt pipes, the shunt pipes are connected with a tangential feed inlet of at least one barrel on the lower part through a flow delivery pipe, and a cone bottom ore discharge port of the barrel is connected with a tangential feed inlet of the barrel below, so that useful minerals in overflow ore pulp are desliming again, secondary useful minerals are obtained, and the ore dressing yield is improved.
The tangentially arranged feed inlets are arranged at intervals along the lower part of the barrel body; the number of the buffer vertical plates of the rotation-isolating slow-flow mechanism corresponds to the number of the tangential feed inlets.
The overflow groove is arranged along the outer wall of the upper end of the barrel body for a circle, a plurality of outlets are arranged at the bottom of the overflow groove at intervals, and the outlets are respectively connected with a plurality of corresponding overflow pipes.
The mud separating pipe is independently arranged into at least one annular pipe, the upper end interval of the annular pipe is connected with the overflow pipe, the lower end interval of the annular pipe is connected with the mud conveying pipe, the annular pipe is connected with the overflow grooves of one or more barrels at the upper part through the overflow pipe, and the annular pipe is connected with the tangential feed inlets of one or more barrels at the lower part through the mud conveying pipe, so that useful minerals in overflow ore pulp are subjected to desliming separation, and secondary useful minerals are obtained.
The cone bottom ore discharge port of the upper barrel body is connected with a multi-way pipe through an ore discharge pipe, the multi-way pipe is respectively connected with a corresponding ore separation pipe, and the ore separation pipe is connected with the tangential feed port of the lower barrel body.
The tangential feed inlets of the uppermost barrel body are respectively connected with the lower ends of the corresponding ore separating pipes, the upper ends of the ore separating pipes are connected with a multi-way pipe, and the upper ends of the multi-way pipes are connected with a tailing pulp main pipe.
And water supplementing ports are arranged on the barrel bodies and are connected with water supplementing pipes so as to supplement water into the barrel bodies or clean the barrel bodies according to the needs.
The invention provides a desliming method based on the spin flow tailing desliming equipment, which is characterized by comprising the following steps:
1) Grinding tailings into ore pulp with the granularity of 60-150 meshes after conventional water mixing;
2) Feeding the ore pulp in the step 1) into a first barrel body through a tailing pulp main pipe, a multi-way pipe and a mineral separating pipe and a tangential feed inlet at a flow rate of 0.3-2.5 m/s, wherein one part of tailing pulp forms a rotational flow at the center of the barrel body, and under the action of a rotation-isolating and flow-buffering mechanism, the mineral with large mass sinks to the bottom of a cone under the dead weight, the other part of tailing pulp directly collides with the rotation-isolating and flow-buffering mechanism, the mineral with large mass sinks to the bottom of the cone under the dead weight, primary ore is obtained, and the rest of tailing pulp overflows into an overflow groove through an overflow port at the upper end of the barrel body, so that primary overflow pulp is obtained;
3) Feeding the primary ore in the step 2) into a second barrel body through an ore discharge port, an ore discharge pipe, a multi-way pipe, an ore separation pipe and a tangential feed port, forming a rotational flow on a part of tailing pulp at the center of the barrel body, sinking the mineral with large mass to the cone bottom under the action of a rotation-isolating and flow-slowing mechanism, sinking the mineral with large mass to the cone bottom under the self weight after the other part of tailing pulp directly collides with the rotation-isolating and flow-slowing mechanism, obtaining concentrate a, and overflowing the rest of tailing pulp into an overflow groove through an overflow port at the upper end of the barrel body to obtain secondary overflow pulp;
4) The primary overflow pulp in the step 2) and the secondary overflow pulp in the step 3) are sent into a shunt tube together through an overflow tube connected with an overflow groove, then sent into a third barrel body through a flow tube and a tangential feed inlet of the third barrel body, one part of overflow pulp forms a rotational flow at the center of the barrel body, and enables heavy minerals to sink to the bottom of a cone under the action of a rotation-isolating and flow-buffering mechanism, the other part of overflow pulp directly collides with the rotation-isolating and flow-buffering mechanism, and then enables heavy minerals to sink to the bottom of the cone under the self weight to obtain secondary ore, and the rest of tail pulp overflows into the overflow groove through an overflow port at the upper end of the barrel body to obtain overflow pulp;
5) Feeding the secondary ore in the step 4) into a fourth barrel body through an ore discharge port, an ore discharge pipe, a multi-way pipe, an ore separation pipe and a tangential feed port, forming a rotational flow on a part of tailing pulp at the center of the barrel body, sinking the mineral with large mass to the cone bottom under the action of a rotation-isolating and flow-buffering mechanism, sinking the mineral with large mass to the cone bottom under the self weight after the other part of tailing pulp is directly collided with the rotation-isolating and flow-buffering mechanism, obtaining concentrate b, and overflowing the rest of tailing pulp into an overflow groove through an overflow port at the upper end of the barrel body, so as to obtain secondary overflow pulp;
6) And (3) delivering the secondary overflow ore pulp in the step (5) into a sedimentation tank for sedimentation, and returning supernatant to the step (1) for recycling, and backfilling sediment or otherwise using.
The invention has the following advantages and effects: by adopting the scheme, after the tailing pulp is tangentially fed into the barrel body, a part of the tailing pulp forms rotational flow at the center of the barrel body, and under the action of the rotation-isolating and flow-slowing mechanism, the mineral with large mass sinks to the cone bottom by dead weight, and the other part of the tailing pulp directly collides with the rotation-isolating and flow-slowing mechanism, so that the mineral with large mass sinks to the cone bottom by dead weight, and finally is discharged through the ore discharge port of the cone bottom, so as to obtain primary useful mineral, while the rest of the tailing pulp overflows into the overflow tank through the overflow port at the upper end of the barrel body and is discharged through the slurry discharge pipe, so as to obtain overflow pulp, and then the useful mineral in the overflow pulp is subjected to desliming again through the mud separation pipe and the mud feeding pipe, so as to obtain secondary useful mineral.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a view B-B of FIG. 1;
fig. 4 is a view of fig. 1 from C-C.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides spin flow tailing desliming equipment, which comprises a barrel body 1 with a cone bottom, wherein an ore discharge port 11 is arranged on the cone bottom, a feed port 12 is tangentially arranged on the barrel body 1, a spin-isolation slow flow mechanism is arranged at the bottom of the barrel body 1, a gap is kept between the bottom of the spin-isolation slow flow mechanism and the cone bottom of the barrel body, an overflow port is arranged at the upper end of the barrel body 1, an overflow groove 15 is arranged at the periphery of the overflow port, and the overflow groove 15 is connected with an overflow pipe 16;
the cyclone separation and flow delay mechanism comprises a hollow cylinder 23 in the middle, the top and the bottom of the hollow cylinder 23 are open, four buffer vertical plates 24 which are spirally distributed are arranged at intervals on the periphery of the hollow cylinder 23, the outer end of each buffer vertical plate 24 is fixed on the inner wall of the barrel body 1, the inner end of each buffer vertical plate is kept in a gap with the hollow cylinder 23, and the height of each buffer vertical plate is lower than the central line of the tangential feed inlet 12 of the barrel body 1, so that the entering tailing slurry is divided into two parts of upper cyclone and lower slow flow through the cyclone separation and flow delay mechanism, thereby being beneficial to improving the desliming efficiency and the grade of useful minerals;
the barrel body 1 is sequentially provided with four connected bottoms and tops, the first barrel body cone bottom ore discharge opening 11 is connected with the tangential feed opening 12 of the second barrel body through an ore discharge pipe 19, a multi-way pipe 14 and an ore separation pipe 13, and after secondary desliming is formed, primary minerals a are discharged through the second barrel body cone bottom ore discharge opening; the overflow pipes 16 of the overflow grooves 15 of the first and second barrels at the upper part are connected with the shunt pipes 17, the shunt pipes 17 are connected with the tangential feed inlet of the third barrel at the lower part through the flow delivery pipe 18, the cone bottom ore discharge port of the third barrel is connected with the tangential feed inlet of the fourth barrel at the lower part through the ore discharge pipe 19, the multi-way pipe 14 and the ore separation pipe 13, so that useful minerals in the overflow ore pulp are desliming again, secondary useful minerals b are obtained, and the ore dressing yield is improved;
the tangentially arranged feed inlets 12 are arranged at intervals along the lower part of the barrel body 1; the number of the buffer vertical plates 24 of the rotation-isolating slow-flow mechanism corresponds to the number of the tangential feed inlets 12 and is four;
the overflow groove 15 is arranged along the outer wall of the upper end of the barrel body for a circle, four outlets are arranged at intervals at the bottom of the overflow groove 15, and the four outlets are respectively connected with four corresponding overflow pipes 16;
the shunt tubes 17 are independently arranged into at least one annular tube, the upper ends of the annular tubes are connected with the overflow tubes 16 at intervals, the lower ends of the annular tubes are connected with the flow delivery tubes 18 at intervals, the annular tubes are connected with the overflow grooves 15 of the first bucket body 1 and the second bucket body 1 at the upper part through the overflow tubes 16, and the annular tubes are connected with the tangential feed inlets of the third bucket body and the fourth bucket body at the lower part through the flow delivery tubes 18 so as to desliming and separating useful minerals in overflow ore pulp and obtain secondary useful minerals b; four overflow pipes 21 connected with the overflow grooves 15 of the third and fourth barrels are respectively connected with a mud discharging main pipe so as to convey the tailings after mineral separation to a subsequent sedimentation tank for treatment through the mud discharging main pipe;
the tangential feed inlets 12 of the uppermost barrel body 1 are respectively connected with the lower ends of the corresponding ore separating pipes 13, the upper ends of the ore separating pipes 13 are connected with the multi-way pipes 14, and the upper ends of the multi-way pipes 14 are connected with the tailing slurry main pipes 20;
the water supplementing ports are arranged on the barrel bodies 1 and are connected with the water supplementing pipes 22 so as to supplement water into the barrel bodies or be used for cleaning the barrel bodies according to the requirements.
The method for desliming based on the spin flow tailing desliming equipment provided by the invention comprises the following steps:
1) Grinding tailings into ore pulp with the granularity of 60-150 meshes after conventional water mixing;
2) Feeding the ore pulp in the step 1) into a first barrel body 1 from a ore separating pipe 13 and a tangential feed inlet 12 respectively through a tailing pulp main pipe 20 and a multi-way pipe 14 at a flow rate of 0.3-2.5 m/s, forming a rotational flow on a part of the tailing pulp at the center of the barrel body, enabling heavy minerals to sink to the bottom of a cone under the action of a cyclone separation and buffer mechanism 23 and 24, enabling heavy minerals to sink to the bottom of the cone under the self weight after the other part of the tailing pulp directly collides with the cyclone separation and buffer mechanism 23 and 24, obtaining primary ore, and overflowing the rest of the tailing pulp into an overflow groove 15 through an overflow port at the upper end of the barrel body to obtain primary overflow ore pulp;
3) Feeding the primary ore of the step 2) into a second barrel body through an ore discharge port, an ore discharge pipe 19, a multi-way pipe 14, an ore separation pipe 13 and a tangential feed port 12, forming a rotational flow on a part of tailing pulp at the center of the barrel body, enabling heavy minerals to sink to the bottom of the cone by self weight under the action of a rotation-isolating and flow- slowing mechanism 23 and 24, enabling heavy minerals to sink to the bottom of the cone by self weight after the other part of tailing pulp is directly collided with the rotation-isolating and flow- slowing mechanism 23 and 24, obtaining concentrate a, and overflowing the rest of tailing pulp into an overflow groove 15 through an overflow port at the upper end of the barrel body, so as to obtain secondary overflow pulp;
4) The primary overflow pulp in the step 2) and the secondary overflow pulp in the step 3) are sent into a shunt tube 17 together through an overflow tube 16 connected with an overflow groove 15, then sent into a third barrel body through a flow sending tube 18 and a tangential feed inlet of the third barrel body, one part of overflow pulp forms rotational flow at the center of the barrel body, and heavy minerals sink to the bottom of a cone under the action of a rotation-isolating and flow- buffering mechanism 23 and 24 under the action of the rotation-isolating and flow- buffering mechanism 23 and 24, and after the other part of overflow pulp is directly collided with the rotation-isolating and flow- buffering mechanism 23 and 24, heavy minerals sink to the bottom of the cone under the self weight, so that secondary ores are obtained, and the rest of tailing pulp overflows into the overflow groove 15 through an overflow port at the upper end of the barrel body, so that overflow pulp is obtained;
5) Feeding the secondary ore of the step 4) into a fourth barrel body through an ore discharge port, an ore discharge pipe 19, a multi-way pipe 14, an ore separation pipe 13 and a tangential feed port 12, forming a rotational flow on a part of tailing pulp at the center of the barrel body, enabling heavy minerals to sink to the bottom of the cone by self weight under the action of a rotation-isolating and flow- slowing mechanism 23 and 24, enabling heavy minerals to sink to the bottom of the cone by self weight after the other part of tailing pulp directly collides with the rotation-isolating and flow- slowing mechanism 23 and 24, obtaining concentrate b, and overflowing the rest of tailing pulp into an overflow groove 15 through an overflow port at the upper end of the barrel body, so as to obtain secondary overflow pulp;
6) And (3) delivering the secondary overflow pulp in the step (5) into a sedimentation tank for sedimentation through an overflow pipe 21 and a mud discharging main pipe, and returning supernatant to the step (1) for recycling, and backfilling sediment or for other use.
In the desliming process, water is supplemented into the corresponding barrel body through the water supplementing pipe 22 according to the requirement, so as to meet the desliming requirement.
The desliming ore obtained by the method has the advantages that the ore dressing efficiency is greatly improved by 60% -80%, the purity of the obtained composite ore sand is high, meanwhile, no additive is added in the desliming process, the process belongs to natural treatment, the environment is not polluted, solid mud in mud flow can be collected intensively for backfilling, the upper water after precipitation can be reused, secondary pollution is not caused, the ore dressing yield is greatly improved, the desliming efficiency is high, the energy consumption is low, the cost is low, the desliming process links for determining the mining efficiency and the cost in the tailings mining are solved, and the reliable technical support is provided for the tailings mining of nonferrous metals.
Claims (8)
1. A method for desliming by using a spin flow tailing desliming device, which is characterized by comprising the following steps:
the spin flow tailing desliming device comprises: the device comprises a barrel body with a cone bottom, wherein an ore discharge port is arranged on the cone bottom, and is characterized in that a feeding port is tangentially arranged on the barrel body, a rotation-separation slow-flow mechanism is arranged at the bottom of the barrel body, a gap is kept between the bottom of the rotation-separation slow-flow mechanism and the cone bottom of the barrel body, an overflow port is arranged at the upper end of the barrel body, an overflow groove is arranged at the periphery of the overflow port, and the overflow groove is connected with an overflow pipe;
the barrel body is sequentially provided with four barrel bodies with a bottom and a top which are connected, the ore discharge port at the cone bottom of the upper barrel body is connected with the tangential feed port of the lower barrel body through an ore discharge pipe, and after at least two-stage desliming is formed, primary minerals are discharged through the ore discharge port at the cone bottom of the lower barrel body; the overflow pipes of the overflow grooves of at least two barrels on the upper part are connected with the shunt pipes, the shunt pipes are connected with the tangential feed inlet of at least one barrel on the lower part through the flow delivery pipe, and the cone bottom ore discharge port of the barrel is connected with the tangential feed inlet of the barrel below;
the method comprises the following steps:
1) Grinding tailings into ore pulp with the granularity of 60-150 meshes after conventional water mixing;
2) Feeding the ore pulp in the step 1) into a first barrel body through a tailing pulp main pipe, a multi-way pipe and a mineral separating pipe and a tangential feed inlet at a flow rate of 0.3-2.5 m/s, wherein one part of tailing pulp forms a rotational flow at the center of the barrel body, and under the action of a rotation-isolating and flow-buffering mechanism, the mineral with large mass sinks to the bottom of a cone under the dead weight, the other part of tailing pulp directly collides with the rotation-isolating and flow-buffering mechanism, the mineral with large mass sinks to the bottom of the cone under the dead weight, primary ore is obtained, and the rest of tailing pulp overflows into an overflow groove through an overflow port at the upper end of the barrel body, so that primary overflow pulp is obtained;
3) Feeding the primary ore in the step 2) into a second barrel body through an ore discharge port, an ore discharge pipe, a multi-way pipe, an ore separation pipe and a tangential feed port, forming a rotational flow on a part of tailing pulp at the center of the barrel body, sinking the mineral with large mass to the cone bottom under the action of a rotation-isolating and flow-slowing mechanism, sinking the mineral with large mass to the cone bottom under the self weight after the other part of tailing pulp directly collides with the rotation-isolating and flow-slowing mechanism, obtaining concentrate a, and overflowing the rest of tailing pulp into an overflow groove through an overflow port at the upper end of the barrel body to obtain secondary overflow pulp;
4) The primary overflow pulp in the step 2) and the secondary overflow pulp in the step 3) are sent into a shunt tube together through an overflow tube connected with an overflow groove, then sent into a third barrel body through a flow tube and a tangential feed inlet of the third barrel body, one part of overflow pulp forms a rotational flow at the center of the barrel body, and enables heavy minerals to sink to the bottom of a cone under the action of a rotation-isolating and flow-buffering mechanism, the other part of overflow pulp directly collides with the rotation-isolating and flow-buffering mechanism, and then enables heavy minerals to sink to the bottom of the cone under the self weight to obtain secondary ore, and the rest of tail pulp overflows into the overflow groove through an overflow port at the upper end of the barrel body to obtain overflow pulp;
5) Feeding the secondary ore in the step 4) into a fourth barrel body through an ore discharge port, an ore discharge pipe, a multi-way pipe, an ore separation pipe and a tangential feed port, forming a rotational flow on a part of tailing pulp at the center of the barrel body, sinking the mineral with large mass to the cone bottom under the action of a rotation-isolating and flow-buffering mechanism, sinking the mineral with large mass to the cone bottom under the self weight after the other part of tailing pulp is directly collided with the rotation-isolating and flow-buffering mechanism, obtaining concentrate b, and overflowing the rest of tailing pulp into an overflow groove through an overflow port at the upper end of the barrel body, so as to obtain secondary overflow pulp;
6) And (3) delivering the secondary overflow ore pulp in the step (5) into a sedimentation tank for sedimentation, and returning supernatant to the step (1) for recycling, and backfilling sediment or otherwise using.
2. The method for desliming by using the spin-flow tailing desliming device as set forth in claim 1, wherein the spin-flow separation and slow-flow mechanism comprises a hollow cylinder body in the middle, the top and the bottom of the hollow cylinder body are open, a plurality of buffering vertical plates distributed in a spiral manner are arranged at intervals on the periphery of the hollow cylinder body, the outer end of each buffering vertical plate is fixed on the cylinder body wall, the inner end of each buffering vertical plate keeps a gap with the hollow cylinder body, and the height of each buffering vertical plate is lower than the center line of a tangential feed inlet of the cylinder body.
3. The method for desliming by using the spin flow tailing desliming device as claimed in claim 1, wherein a plurality of tangentially arranged feed inlets are arranged at intervals along the lower part of the barrel body; the number of the buffer vertical plates of the rotation-isolating slow-flow mechanism corresponds to the number of the tangential feed inlets.
4. The method for desliming by using the spin flow tailing desliming device as set forth in claim 1, wherein the overflow trough is arranged along the outer wall of the upper end of the barrel body for a circle, a plurality of outlets are arranged at intervals at the bottom of the overflow trough, and the outlets are respectively connected with a plurality of corresponding overflow pipes.
5. The method for desliming by the spin flow tailing desliming device according to claim 1, wherein the shunt tubes are independently arranged as at least one annular tube, the upper end of the annular tube is connected with the overflow tube at intervals, the lower end of the annular tube is connected with the mud feeding tube at intervals, the annular tube is connected with the overflow grooves of the upper one or more barrels by the overflow tube, and the annular tube is connected with the tangential feed inlet of the lower one or more barrels by the flow feeding tube.
6. The method for desliming by using the spin flow tailing desliming device as set forth in claim 1, wherein the cone bottom ore discharging opening of the upper barrel body is connected with a multi-way pipe through an ore discharging pipe, the multi-way pipe is respectively connected with a corresponding ore separating pipe, and the ore separating pipe is connected with the tangential feeding opening of the lower barrel body.
7. The method for desliming by using the spin flow tailing desliming device as set forth in claim 1, wherein the tangential feed inlet of the uppermost barrel is connected with the lower ends of the corresponding ore separating pipes respectively, the upper ends of the ore separating pipes are connected with a multi-way pipe, and the upper ends of the multi-way pipe are connected with a tailing slurry main pipe.
8. The method for desliming by using the spin-flow tailing desliming device as set forth in claim 1, wherein the water compensating ports are arranged on each barrel body and are connected with water compensating pipes.
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