Montmorillonite wet purification production system
By designing a montmorillonite wet purification production system, using the combined process of multiple slurry, hydrocyclone and spiral centrifuge, combined with spray drying, the problems of dehydration difficulties and high cost in wet purification are solved, and the problem of dehydration is achieved. Efficient purification of montmorillonite improves product quality and production efficiency.
Patent Information
- Application Number
- CN202420897734.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The existing wet purification process of montmorillonite has difficulties in dehydration and drying and high cost. It is difficult to effectively combine sodiumization with montmorillonite purification, resulting in the failure to fully utilize the product quality and economic value.
A montmorillonite wet purification production system was designed, including hoppers, feeders, crushers, slurry refiners, dosing systems, hydraulic cyclones, lubricants centrifuges, spray dryers and other equipment. Secondary slurry, two-time hydrocyclone rough selection and horizontal centrifuge selection are combined with spray drying technology to achieve the organic combination of sodiumization and montmorillonite purification.
It realizes efficient separation of high-quality montmorillonite products, reduces drying costs and improves production efficiency. It is suitable for bentonite ores with low montmorillonite content. The montmorillonite content of the product can reach more than 90%, and is suitable for inorganic gels. and daily chemicals and other fields.
Smart Images
Figure CN222218622U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of montmorillonite purification, and specifically relates to a montmorillonite wet purification production system. Background Art
[0002] Montmorillonite can be divided into dry purification and wet purification according to different purification methods. Dry purification refers to the separation of montmorillonite and quartz and other coarse-grained minerals in bentonite ore under anhydrous conditions by using the density and particle size differences of the two to achieve the purpose of sand removal. Wet purification is to achieve fine purification of montmorillonite in water medium. The key to purification lies in the dispersion and classification process. Dry purification has low cost and simple process flow, but the purification effect is relatively general. The main purpose is to remove sand. The content of montmorillonite in the product is generally between 60% and 80%. Compared with dry purification, wet purification requires dehydration and drying, the process flow is relatively complicated, and the cost is higher, but the purification effect is better than dry purification. The content of montmorillonite in the product can generally reach 85% or even more than 90%. Wet purification of montmorillonite soil has relatively high added value and can provide raw material guarantee for inorganic gels and daily chemicals, food and medicine in the market.
[0003] Because sodium-based bentonite has higher water absorption and thermal stability, stronger plasticity and adhesion, and better colloidal suspension thixotropy and lubricity than calcium-based bentonite. Therefore, it may be modified during the processing of montmorillonite powder to improve its economic value and application value. Wet modification is to add sodium salt to the water medium and stir it continuously to make the montmorillonite fully dispersed and expanded to achieve sodiumization. This method is easy to obtain high-quality sodium-based bentonite, but the product is difficult to dehydrate and dry. Therefore, it is necessary to further optimize the process to achieve an organic combination of sodiumization and montmorillonite purification. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a montmorillonite wet purification production system, which can ensure the quality index and stability of the produced products.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A montmorillonite wet purification production system comprises a grab hopper, a feeder, a belt conveyor, a crusher, a pulping machine, a dosing system, a hydrocyclone, a horizontal screw centrifuge, a spray dryer, and a finished steel silo. The hydrocyclone comprises an overflow pipe and an underflow pipe, the horizontal screw centrifuge comprises a solid phase outlet and a liquid outlet, the raw ore is added to the feed inlet of the feeder by a grab hopper, the feed outlet of the feeder is connected to the feed end of a belt conveyor, the discharge end of the belt conveyor is connected to the feed inlet of the crusher, and the discharge outlet of the crusher is connected to the feed inlet of the pulping machine; the dosing system The discharge port is connected to the feed port of the pulping machine, and the dosing system is used to add the sodium agent into the pulping machine; the pulping machine is connected to the feed port of the hydrocyclone through a slurry pump, and the hydrocyclone is used to remove impurities and roughly select the modified raw ore powder; the overflow pipe of the hydrocyclone is connected to the feed port of the horizontal screw centrifuge, and the solid phase outlet of the horizontal screw centrifuge and the underflow pipe of the hydrocyclone are connected to the tailings pond; the liquid outlet of the horizontal screw centrifuge is connected to the feed port of the spray dryer, and the discharge port of the spray dryer is connected to the feed port of the finished steel silo.
[0007] Furthermore, the montmorillonite wet purification production system includes two pulping machines connected in series, which are respectively referred to as a first pulping machine and a second pulping machine; the inlet of the first pulping machine is connected to the outlet of the crusher, the outlet of the first pulping machine is connected to the inlet of the second pulping machine through a slurry pump, and the outlet of the second pulping machine is connected to the inlet of the hydrocyclone.
[0008] Furthermore, the discharge port of the dosing system is connected to the feed port of the first pulping machine.
[0009] Furthermore, the montmorillonite wet purification production system also includes a mixer, the overflow pipe of the hydrocyclone is connected to the mixer inlet, and the mixer outlet is connected to the outlet of the horizontal screw centrifuge.
[0010] Furthermore, the hydrocyclone includes two hydrocyclones connected in series, which are respectively referred to as a first hydrocyclone and a second hydrocyclone.
[0011] Furthermore, the montmorillonite wet purification production system also includes a first mixer and a second mixer; the discharge port of the first hydrocyclone is connected to the first mixer, the discharge port of the first mixer is connected to the inlet of the second hydrocyclone through a slurry pump, and the discharge port of the second hydrocyclone is connected to the inlet of the horizontal screw centrifuge through another slurry pump.
[0012] Furthermore, the montmorillonite wet purification production system also includes a sedimentation tank, which includes a mud outlet; a stirring device is provided in the sedimentation tank; the liquid phase outlet of the horizontal screw centrifuge is first connected to the sedimentation tank through a pipeline, and the mud outlet of the sedimentation tank is connected to a spray dryer through a screw pump.
[0013] Furthermore, the montmorillonite wet purification production system also includes a finished product buffer silo, the discharge port of the spray dryer is connected to the feed port of the finished product buffer silo; the discharge port of the finished product buffer silo is connected to the feed port of the finished product steel silo through a pneumatic conveying pipeline; and the tops of the finished steel silo and the finished product buffer silo are both equipped with silo top dust collectors.
[0014] Furthermore, the finished product buffer silo is also connected to a packaging buffer silo through a pneumatic conveying pipeline, and the discharge port of the packaging buffer silo is connected to a packaging machine.
[0015] Furthermore, the crusher is a 2PGC800x600 double-toothed roller crusher, and the horizontal screw centrifuge is a NX5541.
[0016] The beneficial effects of the utility model are:
[0017] The invention realizes the organic combination of sodium bentonite and montmorillonite purification; the utility model can effectively separate high-quality montmorillonite products, especially for bentonite ore with low montmorillonite content (30% to 80%) or containing feldspar and quartz with extremely small particle size, the wet purification operation of the production system is simple and easy, and montmorillonite products of various grades can be effectively obtained, which is suitable for the separation and purification of ordinary grade montmorillonite products;
[0018] The utility model adds a sodiumizing agent during the first pulping, and then the ore is primarily impurity-removed by a hydrocyclone, and then is secondarily impurity-removed by a horizontal screw centrifuge. The montmorillonite suspension from the horizontal screw centrifuge is directly sent to a spray dryer for drying. Due to the presence of water, the suspension can be directly atomized and then dried, and the drying process is efficient, thereby reducing the drying cost; and the equipment has a large processing capacity, can process a large amount of raw materials in a relatively short time, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:
[0020] Figure 1 This is a diagram showing the equipment image connection of an embodiment of the utility model.
[0021] In the figure: 101-loader, 102-feeder, 103-belt conveyor, 104-crusher, 105-grab hopper, 501-first pulping machine, 502-first slurry pump, 503-second pulping machine, 504-second slurry pump, 505-first hydrocyclone, 506-first mixer, 507-third slurry pump, 508-second hydrocyclone, 509-second mixer, 510-fourth slurry pump, 511-horn centrifuge, 512-sedimentation tank, 513-screw pump, 514-spray dryer, 515-silo top dust collector, 516-finished product buffer silo, 517-tailings pond, 518-dosing system, 802-finished product steel silo, 803-discharger, 901-packaging buffer silo, 902-packaging machine. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the present invention.
[0023] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.
[0025] like Figure 1As shown, a montmorillonite wet purification production system includes a grab hopper 105, a feeder 102, a belt conveyor 103, a crusher 104, a pulping machine, a dosing system 518, a hydrocyclone, a mixer, a horizontal screw centrifuge 511, a sedimentation tank 512, a spray dryer 514, and a finished steel silo 802. The hydrocyclone includes an overflow pipe and an underflow pipe, the horizontal screw centrifuge 511 includes a solid phase outlet and a liquid outlet, the sedimentation tank 512 is provided with a stirring device, and the sedimentation tank 512 includes a mud outlet; the raw ore is added to the feed inlet of the feeder 102 by the grab hopper, the discharge port of the feeder 102 is connected to the feed end of a belt conveyor 103, the discharge end of the belt conveyor 103 is connected to the feed inlet of the crusher 104, and the discharge port of the crusher 104 is connected to the feed inlet of the pulping machine; the dosing system 518 includes a bottom flow pipe, a bottom flow pipe, a bottom flow pipe, a solid phase outlet and a liquid outlet, and the sedimentation tank 512 is provided with a stirring device, and the sedimentation tank 512 includes a mud outlet; the raw ore is added to the feed inlet of the feeder 102 by the grab hopper, the discharge port of the feeder 102 is connected to the feed end of the belt conveyor 103, the discharge end of the belt conveyor 103 is connected to the feed inlet of the crusher 104, and the discharge port of the crusher 104 is connected to the feed inlet of the pulping machine; the dosing system 518 includes a bottom flow pipe, a bottom flow pipe, a bottom flow pipe, a horizontal screw centrifuge 511, a solid phase outlet and a liquid outlet, and the sedimentation tank 512 includes a stirring device 8 is connected with the feed inlet of the pulping machine, and the dosing system 518 is used to add sodium agent into the pulping machine; the pulping machine is connected to the feed inlet of the hydrocyclone through a slurry pump, and the hydrocyclone is used to remove impurities and rough selection of the modified raw ore powder; the overflow pipe of the hydrocyclone is connected to the feed inlet of the mixer, and the discharge port of the mixer is connected to the discharge port of the horizontal screw centrifuge 511, and the mixer stirs and mixes the discharge of the hydrocyclone; the solid phase outlet of the horizontal screw centrifuge 511 and the underflow pipe of the hydrocyclone are connected to the tailings pond 517; the liquid phase outlet of the horizontal screw centrifuge 511 is first connected to the sedimentation tank 512 through a pipeline, and the mud outlet of the sedimentation tank 512 is connected to the spray dryer 514 through a screw pump 513; the discharge port of the spray dryer 514 is connected to the feed inlet of the finished steel silo 802.
[0026] Further, such as Figure 1 As shown, the montmorillonite wet purification production system includes two pulping machines connected in series, which are respectively denoted as the first pulping machine 501 and the second pulping machine 503; the feed inlet of the first pulping machine 501 receives the discharge port of the crusher 104, the discharge port of the first pulping machine 501 is connected to the feed inlet of the second pulping machine 503 through a slurry pump, and the discharge port of the second pulping machine 503 is connected to the feed inlet of the hydrocyclone; the discharge port of the dosing system 518 is connected to the feed inlet of the first pulping machine 501, giving sufficient reaction time between the sodium agent and the ore powder.
[0027] Further, such as Figure 1As shown, the hydrocyclone includes two hydrocyclones connected in series and two mixers, the hydrocyclones are respectively denoted as the first hydrocyclone 505 and the second hydrocyclone 508, and the mixers are denoted as the first mixer 506 and the second mixer 509; the discharge port of the first hydrocyclone 505 is connected to the first mixer 506, the discharge port of the first mixer 506 is connected to the inlet of the second hydrocyclone 508 through a slurry pump, and the discharge port of the second hydrocyclone 508 is connected to the inlet of the horizontal screw centrifuge 511 through another slurry pump.
[0028] Further, such as Figure 1 As shown, the montmorillonite wet purification production system also includes a finished product buffer silo 516, and the discharge port of the spray dryer 514 is connected to the feed port of the finished product buffer silo 516; the discharge port of the finished product buffer silo 516 is connected to the feed port of the finished steel silo 802 through a pneumatic conveying pipeline; the tops of the finished steel silo 802 and the finished product buffer silo 516 are both equipped with a silo top dust collector 515; the finished product buffer silo 516 is also connected to a packaging buffer silo 901 through a pneumatic conveying pipeline, and the discharge port of the packaging buffer silo 901 is connected to a packaging machine 902; the discharge port of the finished steel silo 802 is equipped with a discharger 803, so that the finished steel silo 802 can be directly connected to the powder tank truck to pneumatically convey the product into the powder tank truck.
[0029] The production system of this embodiment is mainly used for obtaining relatively high value-added purified bentonite and downstream products through wet purification, such as bentonite inorganic gel, raw materials for daily chemical products, food and medicine, etc.; the annual output is 2,000 tons.
[0030] The correct selection of process equipment is the key to ensure smooth process flow, stable product quality and reduced production costs. The 20,000 t / a montmorillonite wet purification production system of this embodiment uses the following advanced, reliable, high-efficiency and low-energy consumption main process equipment:
[0031] The feeder 102 is an automatic metering feeder 102. After the production demand parameters are determined according to the material properties and production demand, the feeder 102 can automatically control the frequency and adjust the feeding amount;
[0032] Crusher 104, since the moisture content of the raw material is about 25%, according to the material characteristics and actual production experience, a double-toothed roller crusher is selected, specifically a 2PGC800×600 double-toothed roller crusher;
[0033] Pulping equipment: two pulping machines are connected in series to achieve better pulping effect;
[0034] Roughing equipment: Hydrocyclones are used in roughing operations. Because the hydrocyclones are wear-resistant, have good sorting effects, and the diameter of the sand discharge nozzles is easy to adjust, they can effectively control and ensure the separation particle size of each level of sorting operations. Hydrocyclones are used for two roughing operations to remove the medium-sized sand in the bentonite.
[0035] Decanter centrifuge 511, as a selective purification equipment, can obtain high-quality products in bentonite purification and meet the process technology requirements; the model of the decanter centrifuge 511 is NX5541;
[0036] Spray dryer 514: For bentonite with good water absorption and excellent colloidal properties, since the concentration of wet-process purified bentonite is dilute and it is difficult to filter and dehydrate after purification, this embodiment uses spray dryer 514 and cooperates with sedimentation tank 512. The slurry after centrifugation is first stirred and mixed in sedimentation tank 512, and then dried by spray dryer 514. Spray dryer 514 is good at drying dilute slurry and has high thermal efficiency.
[0037] Packaging machine 902, select the fully automatic packaging machine 902, realize automatic control, automatic packaging of tons of packaging, adopt intelligent storage management, reduce dust pollution and labor intensity;
[0038] The utility model connects two pulping machines in series to make pulp, performs two hydrocyclone roughing, and uses a centrifuge as a selection device before spray drying, so as to achieve good impurity removal effect; it can effectively separate high-quality montmorillonite products, especially bentonite ores with low montmorillonite content (30% to 80%) or extremely small feldspar and quartz particle sizes; the equipment of the utility model has a large processing capacity, can process a large amount of raw materials in a short time, and improves production efficiency; the purification operation is simple and easy, and montmorillonite products of various grades can be effectively obtained, and it is suitable for the separation and purification of ordinary-grade montmorillonite products.
[0039] The process flow of the utility model is briefly described as follows: raw ore → crushing → (adding sodium agent) pulping → hydrocyclone impurity removal and rough selection → horizontal screw centrifuge 511 impurity removal and selection → spray drying → packaging → product; specifically, the main mineral component of the bentonite raw material in the raw material yard is montmorillonite, with a content of 40% to 60%; it also contains a certain amount of quartz, kaolin, feldspar, etc., and the moisture content is about 25%;
[0040] The stockpile raw materials are transported to the crushing area by the loader 101, and are fed to the feeder 102 on the belt conveyor 103 by the grab bucket. The ore raw materials are sent to the crusher 104 by the belt conveyor 103. The crushed ore is sent to the pulping machine by the belt conveyor 103 or the screw conveyor. At the same time, the sodium agent is added to the first pulping machine, and the ore is sent to the second pulping machine 503 through the first slurry pump 502 for full pulping. After that, the ore is sent to the first hydrocyclone 505 for impurity removal and rough selection by the second slurry pump 504. The water discharged from the overflow pipe of the first hydrocyclone 505 is sent to the third slurry pump 507. The second hydrocyclone 508 removes the medium-sized sand in the bentonite through two cyclone removals; the water discharged from the second hydrocyclone 508 is fed to the horizontal screw centrifuge 511 for selection through the fourth slurry pump 510, and the montmorillonite content of the selected concentrate bentonite is increased to 90%. The concentrate is mixed and spray-dried, and then pneumatically conveyed to the pre-packaging silo, and then sent to the finished product warehouse for storage and sale after packaging; the selected tailings are transported to the tailings pond 517 or the tailings pile shed through the screw pump 513, mixed with the tailings of the dry purification production line and then dry-piled, and the wet tailings and dry tailings are mixed and then stored in the yard or sold as by-products.
[0041] This production system can ensure the quality indicators and stability of the products produced. The wet-process purified soil complies with the JC / T2578-2020 "Montmorillonite" standard. The product indicators of wet-process purified soil are blue absorption ≥38g / 100g, pH value 6-9, 75μm screening rate ≥99.5%, and moisture ≤10%.
[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.
Claims
1. A montmorillonite wet purification production system, comprising a grab hopper (105), a feeder (102), a belt conveyor (103), a crusher (104), a pulping machine, a dosing system (518), a hydrocyclone, a horizontal screw centrifuge (511), a spray dryer (514), and a finished steel silo (802), wherein the hydrocyclone comprises an overflow pipe and an underflow pipe, and the horizontal screw centrifuge (511) comprises a solid phase outlet and a liquid outlet, and is characterized in that: The raw ore is added to the feed port of the feeder (102) by a grab bucket, the discharge port of the feeder (102) is connected to the feed end of a belt conveyor (103), the discharge end of the belt conveyor (103) is connected to the feed port of a crusher (104), the discharge port of the crusher (104) is connected to the feed port of a pulping machine; the discharge port of the dosing system (518) is connected to the feed port of the pulping machine, and the dosing system (518) is used to add a sodium agent into the pulping machine; the pulping machine is connected to the feed port of the pulping machine through a slurry pump. to the feed inlet of the hydrocyclone, the hydrocyclone is used to remove impurities and roughly select the modified raw ore powder; the overflow pipe of the hydrocyclone is connected to the feed inlet of the horizontal screw centrifuge (511), the solid phase outlet of the horizontal screw centrifuge (511) and the underflow pipe of the hydrocyclone are connected to the tailings pond (517); the liquid outlet of the horizontal screw centrifuge (511) is connected to the feed inlet of the spray dryer (514), and the discharge port of the spray dryer (514) is connected to the feed inlet of the finished steel silo (802).
2. The montmorillonite wet purification production system according to claim 1, characterized in that: The montmorillonite wet purification production system comprises two pulping machines connected in series, which are respectively denoted as a first pulping machine (501) and a second pulping machine (503); the inlet of the first pulping machine (501) is connected to the outlet of the crusher (104), the outlet of the first pulping machine (501) is connected to the inlet of the second pulping machine (503) through a slurry pump, and the outlet of the second pulping machine (503) is connected to the inlet of the hydrocyclone.
3. The montmorillonite wet purification production system according to claim 2, characterized in that: The discharge port of the dosing system (518) is connected to the feed port of the first pulping machine (501).
4. The montmorillonite wet purification production system according to claim 1, characterized in that: The montmorillonite wet purification production system also includes a stirrer, the overflow pipe of the hydrocyclone is connected to the inlet of the stirrer, and the outlet of the stirrer is connected to the outlet of the horizontal screw centrifuge (511).
5. The montmorillonite wet purification production system according to claim 1, characterized in that: The hydrocyclone comprises two hydrocyclones connected in series, which are respectively denoted as a first hydrocyclone (505) and a second hydrocyclone (508).
6. The montmorillonite wet purification production system according to claim 5, characterized in that: The montmorillonite wet purification production system also includes a first mixer (506) and a second mixer (509); the discharge port of the first hydrocyclone (505) is connected to the first mixer (506), the discharge port of the first mixer (506) is connected to the inlet port of the second hydrocyclone (508) through a slurry pump, and the discharge port of the second hydrocyclone (508) is connected to the inlet port of the horizontal screw centrifuge (511) through another slurry pump.
7. The montmorillonite wet purification production system according to claim 1, characterized in that: The montmorillonite wet purification production system also includes a sedimentation tank (512), the sedimentation tank (512) includes a mud outlet, and a stirring device is provided in the sedimentation tank (512); the liquid phase outlet of the horizontal screw centrifuge (511) is first connected to the sedimentation tank (512) through a pipeline, and the mud outlet of the sedimentation tank (512) is connected to the spray dryer (514) through a screw pump (513).
8. The montmorillonite wet purification production system according to claim 1, characterized in that: The montmorillonite wet purification production system also includes a finished product buffer silo (516), and the discharge port of the spray dryer (514) is connected to the feed port of the finished product buffer silo (516); the discharge port of the finished product buffer silo (516) is connected to the feed port of the finished product steel silo (802) through a pneumatic conveying pipeline; and the tops of the finished steel silo (802) and the finished product buffer silo (516) are both equipped with silo top dust collectors (515).
9. The montmorillonite wet purification production system according to claim 8, characterized in that: The finished product buffer silo (516) is also connected to a packaging buffer silo (901) via a pneumatic conveying pipeline, and the discharge port of the packaging buffer silo (901) is connected to a packaging machine (902).
10. The montmorillonite wet purification production system according to claim 1, characterized in that: The crusher (104) is a 2PGC800x600 double-toothed roller crusher, and the horizontal screw centrifuge is a NX5541.