Production system for efficiently separating ardealite impurities through rotational flow

Abstract

The invention relates to a production system for efficiently sorting ardealite impurities through rotational flow. The production system comprises a pulping barrel, a slurry pump, a cyclone, a filter and a filtrate pool, the cyclone comprises an ore feeding pipe, a cylinder, an overflow pipe, a cone and a sand setting opening. The method is beneficial to improving the quality of the phosphogypsum and realizing high-quality resource utilization of the phosphogypsum.

Description

Technical Field

[0001] The present invention relates to the field of phosphogypsum pretreatment, and in particular to the efficient separation of organic impurities in phosphogypsum. Background Art

[0002] Phosphogypsum is a byproduct of the wet-process phosphoric acid industry. It contains organic impurities, and large-scale storage poses environmental risks, polluting soil, air, and water. Proper disposal and treatment of this material is a key issue. Sorting out organic impurities from phosphogypsum facilitates its resource utilization.

[0003] In the cyclone, the phosphogypsum slurry enters the cyclone tangentially from its periphery at a constant pressure, generating a strong three-dimensional elliptical, highly rotating, shearing turbulent flow. Due to the particle size difference between the gypsum and the organic matter, they are subjected to different centrifugal forces, centripetal buoyancy, and fluid drag. Due to centrifugal sedimentation, the gypsum is discharged through the cyclone's underflow outlet, while the organic matter is discharged through the overflow pipe, achieving separation and classification.

[0004] Wind power, photovoltaic power generation, and hydropower, also known as green electricity, are renewable, clean energy sources that ensure zero carbon emissions from the system's electricity consumption. This green electricity is stored in a sodium-ion battery system, which offers low cost and stable power. Photovoltaic power generation is located at photovoltaic power plants, wind power generation at wind farms, and hydropower at hydropower stations. Green electricity from these power plants and hydropower stations is connected to the sodium-ion battery energy storage system within the phosphogypsum plant via metal conductors. The sodium-ion battery energy storage system is then connected to the electrical equipment in the production system via metal conductors.

[0005] Currently, there is no production system that can use green electricity to efficiently separate organic impurities in phosphogypsum. This system also has the characteristics of high production efficiency, low equipment investment, and less site usage. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a production system for efficiently separating phosphogypsum impurities by cyclone, which has high production efficiency and achieves carbon neutrality in the phosphogypsum separation process.

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] A production system for efficiently separating phosphogypsum impurities by cyclone flow comprises a beating barrel, a slurry pump, a cyclone, a filter, and a filtrate tank; wherein the cyclone comprises a feed pipe, a cylinder, an overflow pipe, a cone, and a sand settling port.

[0009] The electric energy used by the system is one of photovoltaic power generation, wind power generation and hydropower generation.

[0010] The filter is a plate and frame filter press or a vacuum filter.

[0011] The material of the sand trap is one of alumina, mullite and zirconia.

[0012] The water in the filtrate pool is circulated and used as water for the beating barrel.

[0013] The phosphogypsum sorting system uses green electricity as its electricity energy, which is green and low-carbon.

[0014] The beating barrel is a cylindrical barrel with a stirring blade fixed on it to mix the added phosphogypsum and water evenly.

[0015] A slurry pump, also known as a vortex pump, is a vane pump that transfers kinetic energy by applying an impulse to the liquid through the force of a rotating impeller. It primarily consists of an impeller, pump body, and pump cover. The impeller is a circular disc with radially arranged blades along its circumference. An annular flow channel is formed between the pump body and impeller. The suction and discharge ports are both located on the outer circumference of the impeller. A partition separates the suction and discharge ports.

[0016] The cyclone includes a feed pipe, a cylinder, an overflow pipe, a cone, and a sand settling port. It has the characteristics of simple structure, no moving parts, and low operating cost.

[0017] The filter is a plate and frame filter press or a vacuum filter, both of which can achieve the purpose and have the characteristics of reliable operation.

[0018] The plate and frame filter press was the first machine used for chemical dehydration. It consists of alternating plates and a frame, with filter cloth covering both sides of the filter plates. A clamping device compresses the plates and frame together, creating a filter press chamber. Small holes are located in the middle of the upper ends of the plates and frame, creating a channel through which pressurized slurry, pressurized to 0.2-0.4 MPa, enters the filter press chamber. The filter plates are grooved on their surfaces, and holes are drilled at their lower ends for the filtrate to drain. Under pressure, the filtrate flows through the filter cloth, along the grooves and holes, and out of the filter, dehydrating the slurry.

[0019] A vacuum filter, also known as a vacuum filter, is a device that uses vacuum pressure as a driving force to separate solids from liquids. Under the action of vacuum pressure (0.04-0.07 MPa), the liquid in the slurry is drawn through the filter medium (filter cloth), while the solid particles are retained by the medium, thus achieving liquid-solid separation.

[0020] The filtrate pool is a filtrate storage pool. The water in the filtrate pool is added to the beating barrel to prepare slurry, realizing wastewater circulation and zero discharge.

[0021] In this patented system, each device is connected by a pipe, and the slurry pump and the filtrate pump provide the motive force for the flow of the slurry and the filtrate respectively. The gypsum slurry is corrosive. The equipment used in this patent, the pipes connecting the equipment, and the conveying pumps, the parts in contact with the slurry are made of stainless steel, carbon steel surface covered with plastic, and carbon steel surface covered with cast stone, all of which can achieve the purpose; these materials have the characteristics of extending the service life of the equipment. The carbon steel surface is covered with plastic, and the plastic is one of nylon, polytetrafluoroethylene, and polyformaldehyde, all of which can achieve the purpose. The carbon steel surface is covered with cast stone, and the cast stone is made of steel slag and copper slag as raw materials. It is a material with regular crystal arrangement, hard texture, and fine texture made through the processes of batching, melting, pouring, and heat treatment. It is wear-resistant and has a long service life.

[0022] After sorting by this sorting system, the content of organic matter in phosphogypsum is ≤0.1%, which is beneficial to the resource utilization of gypsum. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of this patent or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the prior art descriptions; obviously, the drawings described below are only one embodiment recorded in this patent, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 The present invention provides a schematic flow diagram of a production system for efficiently separating phosphogypsum impurities using a cyclone, as provided in an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of a cyclone provided in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 1-beating barrel; 2-slurry pump; 3-cyclone; 4-filter, 4.1-organic filter, 4.2-concentrate filter; 5-filtrate tank; 6-filtrate pump; 7-organic tailings; 8-concentrate; 9-phosphogypsum;

[0028] 21-overflow pipe, 22-cylinder, 23-feeding pipe, 24-cone, 25-sand settling port. DETAILED DESCRIPTION

[0029] To help those skilled in the art better understand this patent, the following further describes this patent with reference to the accompanying drawings and examples. Obviously, the described embodiment is only one example of this patent, not all examples. The embodiments and features within these embodiments may be combined with each other unless there is a conflict.

[0030] See also Figure 1The system comprises a beating barrel 1, a slurry pump 2, a cyclone 3, a filter 4, a filtrate tank 5, and a filtrate pump 6. The cyclone 3 comprises an overflow pipe 21, a cylinder 22, a feed pipe 23, a cone 24, and a grit port 25. The phosphogypsum 9 is added from the top of the beating barrel 1. The bottom of the beating barrel 1 is connected to the slurry pump 2, which is in turn connected to the feed pipe 23 of the cyclone 3. The organic tailings slurry separated by the cyclone 3 is discharged from the overflow pipe 21 and enters the organic filter 4.1 to produce organic tailings 7. The filtrate enters the filtrate tank 5. The concentrate separated by the cyclone 3 is discharged from the grit port 25 and enters the concentrate filter 4.2 to produce concentrate 8. The filtrate enters the filtrate tank 5. The filtrate enters the filtrate pump 6 and enters the beating barrel 1 for recycling. The filtrate flow in the figure is represented by dotted lines, and the material flow is represented by solid lines. Pipes are used to connect the equipment.

[0031] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the scope of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A production system for efficiently separating phosphogypsum impurities by cyclone flow, comprising a beating barrel, a slurry pump, a cyclone, a filter, and a filtrate tank; wherein: The cyclone includes a feed pipe, a cylinder, an overflow pipe, a cone, and a sand settling port.

2. A cyclone-based efficient separation system for phosphogypsum impurities according to claim 1, characterized in that: The electric energy used by the system is one of photovoltaic power generation, wind power generation and hydropower generation.

3. A cyclone efficient separation system for phosphogypsum impurities according to claim 1, characterized in that: The filter is a plate and frame filter press or a vacuum filter.

4. A production system for efficiently separating phosphogypsum impurities by cyclone according to claim 1, characterized in that: The material of the sand trap is one of alumina, mullite and zirconia.

5. The production system for efficiently separating phosphogypsum impurities by cyclone according to claim 1, characterized in that: The water in the filtrate pool is circulated and used as water for the beating barrel.

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