Full dehydration system for full tailings with uneven particle size distribution
By designing a fully dehydrating system, the coarse tailing sand is dehydrated and sold outside using a linear dehydration screen. The fine tailing sand is dry discharged through a diaphragm filter press, which solves the problem of damage to the filter plate of the diaphragm filter press caused by uneven particle size distribution, and achieves the effect of reducing production costs and improving dehydration efficiency.
Patent Information
- Application Number
- CN202421666111.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-15
AI Technical Summary
In the ore dressing operation, the whole tailing sand with uneven particle size distribution leads to damage to the filter plate filter cloth of the diaphragm filter press, increasing production costs and labor demand.
A fully dehydrating system is designed, including a dense tank, a dense machine, a bottom-flow slurry pump, a linear dehydration screen, a filter press and a stirring barrel, a feeding pump, a diaphragm filter press, a belt machine and a tailing room. The system dehydrates the coarse tailings sand through a linear dehydration screen and sells them outside, while the fine tailings sand is dry discharged through a diaphragm filter press.
It effectively avoids damage to the filter plate filter cloth caused by coarse-grained tailings during the dehydration process of the diaphragm filter press, reduces production costs, and realizes dry accumulation of full tailings sand, which has the characteristics of low cost, simple process flow and good dehydration effect.
Smart Images
Figure CN222829243U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a ore dressing tailings processing device, in particular to a full dehydration system for full tailings with uneven particle size distribution. Background Art
[0002] The part of the ore dressing process that has a low content of useful components and cannot be used is called tailings. According to statistics from relevant departments, tailings produced by mines account for about one-third of industrial solid waste, which not only damages the ecological environment, but also affects the high-quality development of enterprises. With the issuance of relevant national environmental protection policies, dry tailings discharge has become a development trend for mines to achieve energy conservation and emission reduction and build green mines.
[0003] Diaphragm filter press is widely used in various mining industries for the dehydration of all tailings due to its advantages of simple operation, high efficiency, good stability, good dehydration effect and low cost. However, when the tailings particle size difference generated in the mineral processing operation is too large and there are ores larger than 3mm in the tailings, the tailings in the mixing barrel directly enter the diaphragm filter press through the feeding pump. Due to the uneven gradation of the whole tailings particles, the filter plate and filter cloth of the diaphragm filter press are damaged, which increases the cost and the filter press may produce pulp, which invisibly increases the labor of workers. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a full dehydration system for full tailings with uneven particle size distribution, so as to solve the problem of damage to filter plates and filter cloths of diaphragm filter presses.
[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is: it includes a thickening tank, a thickener, an underflow slurry pump, a linear dewatering screen, a filter press stirring barrel, a feeding pump, a diaphragm filter press, a belt conveyor and a tailings room; the thickening tank is connected with the outlet of the tailings chute of the ore dressing plant, and the thickener is installed on the top of the thickening tank; the bottom outlet of the thickening tank is connected with the inlet of the linear dewatering screen through the underflow slurry pump, and the above-screen outlet of the linear dewatering screen is connected with the tailings room through the belt conveyor; the below-screen outlet of the linear dewatering screen is connected with the inlet of the filter press stirring barrel, and the outlet of the filter press stirring barrel is connected with the inlet of the diaphragm filter press through the feeding pump, and the outlet of the diaphragm filter press is connected with the tailings room through the belt conveyor.
[0006] Furthermore, the overflow port of the thickener is connected to the circulating water tank of the ore dressing plant.
[0007] Furthermore, the linear dewatering screen is a dewatering screen with an excitation structure.
[0008] Furthermore, the underflow slurry pump, feed pump and linear dewatering screen are all provided with spare parts.
[0009] The beneficial effect produced by adopting the above technical scheme is that: the utility model first dehydrates the coarse tailings by adding a linear dewatering screen, screens out the natural air-drying and forms construction sand for sale; the fine tailings are dehydrated to the filter cake state by the diaphragm filter press and then discharged dry, thereby avoiding serious damage to the filter plate and filter cloth of the diaphragm filter press due to the presence of coarse-grained tailings during the dehydration process, reducing production costs, and realizing dry accumulation of all tailings, with the characteristics of low cost, simple process flow and good dehydration effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0011] Figure 1 It is a schematic diagram of the system structure of the utility model.
[0012] In the figure: thickening tank 1, thickener 2, underflow slurry pump 3, linear dewatering screen 4, filter press mixing barrel 5, feeding pump 6, diaphragm filter press 7, belt conveyor 8, tailings room 9. DETAILED DESCRIPTION
[0013] Figure 1 As shown, the full dewatering system for tailings with uneven particle size distribution includes a thickener 1, a thickener 2, an underflow slurry pump 3, a linear dewatering screen 4, a filter press agitator 5, a feed pump 6, a membrane filter press 7, a belt conveyor 8 and a tailings room 9. The thickener 1 is connected to the outlet of the tailings chute of the ore dressing plant, and the thickener 2 is installed on the top of the thickener 1; the bottom outlet of the thickener 1 is connected to the inlet of the linear dewatering screen 4 through the underflow slurry pump 3, and the upper outlet of the linear dewatering screen 4 is connected to the tailings room 9 through the belt conveyor 8; the lower outlet of the linear dewatering screen 4 is connected to the inlet of the filter press agitator 5, and the outlet of the filter press agitator 5 is connected to the inlet of the membrane filter press 7 through the feed pump 6, and the outlet of the membrane filter press 7 is connected to the tailings room 9 through the belt conveyor 8. The overflow of the thickener 2 is connected to the annular water tank of the ore dressing plant. The linear dewatering screen 4 is a vibration structure dewatering screen, and its fine structure can prevent the material from clogging the screen holes and has high dewatering efficiency. The tailings can be divided into different particle sizes by changing the size of the screen holes. The linear dewatering screen 4 is also provided with a separation box to achieve uniform feeding of the tailings.
[0014] The underflow slurry pump 3, feed pump 6, and linear dewatering screen 4 are all provided with spares; preferably, one thickener 1 and one filter press agitator 5 are each provided with, two underflow slurry pumps 3 and linear dewatering screens 4 are each provided with, one in use and one in reserve, four feed pumps 6 are provided with, three in use and one in reserve, and three diaphragm filter presses are provided. The tailings room 9 is a common place for the screening workshop and the filter press workshop.
[0015] Figure 1 As shown in the figure, the use process of the full dewatering system for full tailings with uneven particle size distribution is as follows:
[0016] (1) Tailings from the concentrator are pumped to the tailings chute, and the thickener 1 is connected to the outlet of the tailings chute of the concentrator. A thickener 2 is installed on the top of the thickener 1; the overflow of the thickener 1 and the thickener 2 returns to the circulating water tank, and the underflow passes through the underflow slurry pump 3 and enters the linear dewatering screen 4 ore separation box for uniform screening.
[0017] (2) The screened material of the linear dewatering screen 4 is sent to the tailings room 9 through a belt conveyor 8, and is naturally dried to form construction sand for sale.
[0018] (3) The screened material of the linear dewatering screen 4 flows by gravity to the filter press agitator 5 through a pipeline. The slurry in the filter press agitator 5 enters the diaphragm filter press 7 through a feeding pump 6 for dewatering. The dewatered tailings filter cake is transported to the tailings room 9 through a belt conveyor 8 and discharged by truck for use in open-pit mine management.
[0019] A specific embodiment of the full dewatering system for full tailings with uneven particle size distribution is as follows:
[0020] The diameter of thickener 1 is 30m, and the high-efficiency thickener 2 is DELK-HRT-30, a Φ30m high-efficiency thickener;
[0021] There are 2 underflow slurry pumps 3, one for use and one for backup, model 100ZJ-50, and the pipeline is lined with ceramic composite pipe, DN200mm;
[0022] There are 2 linear dewatering screens 4, one for use and one for backup, model TS3070;
[0023] The filter press mixing tank 5 has a diameter of 4m and a height of 4m;
[0024] There are 4 feeding pumps 6, three for use and one for backup, model 100ZJ-50;
[0025] There are 3 membrane filter presses 7, model: HMZGFQ700 / 2000-U;
[0026] There are 4 belt conveyors 8, which are 32m long and 1.2m wide.
[0027] The implementation process of this embodiment is as follows:
[0028] The concentrator discharges tailings with a concentration of about 10wt% into the thickening tank 1, and the high-efficiency thickener 2 performs flocculation, concentration and sedimentation. The overflow clear water returns to the concentrator, and the underflow with a concentration of about 48wt% is transported to the feed port of the linear dewatering screen 4 through the underflow slurry pump 3 for screening.
[0029] The linear dewatering screen 4 selects the coarse tailings of 0.5mm to 3mm and sends them to the tailing room 9 through the belt conveyor 8 to form construction sand with a moisture content of no more than 18% for sale;
[0030] The fine tailings with a size less than 0.5 mm selected by the linear dewatering screen 4 are transported to the filter press mixing barrel 5 through a pipeline for buffering, and then transported to three diaphragm filter presses 7 through three feeding pumps 6 for further filtration into filter cakes with a moisture content not higher than 16%, which are then transported to the tailings room 9 through a belt conveyor 8 and discharged externally by trucks for open-pit mine management.
[0031] The process flow of the full dehydration system is simple and reasonable. By adding a linear dehydration screen 4, the material can be graded. The coarse tailings of 0.5mm to 3mm can be sold to achieve a certain economic benefit income; the fine tailings below 0.5mm are filtered and dry-discharged, which can be used for environmental governance. In addition, due to the removal of the coarse tailings, the service life of the filter plate and filter cloth of the filter press is increased by 300%, which greatly improves the economic benefits of the mine.
Claims
1. A full dewatering system for tailings with uneven particle size distribution, characterized by: The invention comprises a thickening tank (1), a thickener (2), an underflow slurry pump (3), a linear dewatering screen (4), a filter press stirring barrel (5), a feed pump (6), a membrane filter press (7), a belt conveyor (8) and a tailings room (9); the thickening tank (1) is connected to the outlet of the tailings chute of the ore dressing plant, and the thickener (2) is installed on the top of the thickening tank (1); the bottom outlet of the thickening tank (1) is connected to the inlet of the linear dewatering screen (4) through the underflow slurry pump (3), and the upper screen outlet of the linear dewatering screen (4) is connected to the tailings room (9) through the belt conveyor (8); the lower screen outlet of the linear dewatering screen (4) is connected to the inlet of the filter press stirring barrel (5), and the outlet of the filter press stirring barrel (5) is connected to the inlet of the membrane filter press (7) through the feed pump (6), and the outlet of the membrane filter press (7) is connected to the tailings room (9) through the belt conveyor (8).
2. A full dewatering system for full tailings with uneven particle size distribution according to claim 1, characterized in that: The overflow port of the thickener (2) is connected to the circulating water tank of the ore dressing plant.
3. A full dewatering system for full tailings with uneven particle size distribution according to claim 1, characterized in that: The linear dewatering screen (4) is a dewatering screen with an excitation structure.
4. A full dewatering system for full tailings with uneven particle size distribution according to claim 1, 2 or 3, characterized in that: The underflow slurry pump (3), the feed pump (6), and the linear dewatering screen (4) are all provided with spare parts.