CN210409766U - Lead slag filtering device for zinc hydrometallurgy - Google Patents

Abstract

The utility model relates to a zinc hydrometallurgy lead slag filtering device, belonging to the technical field of zinc hydrometallurgy auxiliary equipment; zinc hydrometallurgy lead slag filter equipment includes entity frame, rotary drum, filter screen, main shaft, bearing, main motor, and the rotary drum passes through the main shaft and the bearing is installed in the entity frame, is equipped with main motor on the entity frame, and the main shaft passes through belt drive by main motor, installs the filter screen on the rotary drum inside wall, sets up inlet pipe and doctor-bar in the rotary drum, is equipped with liquid phase overflow mouth and leakage fluid dram on the entity frame lateral wall, and the rotary drum top is equipped with and blocks the liquid board, and the rotary drum bottom is equipped with the solid sediment bin outlet, and entity frame bottom is equipped with the. The utility model adopts the novel filtering device to replace the original box-type filter press, reduces the working pressure of the hydraulic cylinder and reduces the potential safety hazard brought by the equipment; the environmental pollution caused by the press filter in the pressing process is reduced, the lead slag discharging difficulty is reduced, and the water content of the filter residue is controlled between 13 and 15 percent.

Description

Lead slag filtering device for zinc hydrometallurgy

Technical Field

The utility model belongs to the technical field of zinc hydrometallurgy auxiliary assembly, specifically speaking relates to a zinc hydrometallurgy lead slag filter equipment.

Background

The comprehensive zinc oxide fume recovering technology is capable of recovering metals such as zinc, lead, germanium, silver and the like from fume produced in a fuming furnace. The main process flow is zinc oxide smoke pneumatic conveying → ball milling-size mixing → leaching-thickening → Daning sink germanium → neutralization-thickening → three-stage purification → electrolysis and triple effect evaporation to produce zinc sulfate heptahydrate, and in addition, neutralization residue filtering and lead residue filtering and drying. And pumping the underflow of the two-stage leaching thickener to 2 box type filter presses of the lead slag workshop for filtering, wherein the 2 box type filter presses are used in parallel. Filtering to obtain filtrate, feeding the filtrate into a filtrate intermediate tank, and pumping the filtrate back to a section of acidic leaching; filter residue is added into the rotary drying kiln through a belt conveyor. The drying kiln takes natural gas as fuel. The dried lead slag is sent to a lead concentrate bin of a material preparation section of the conventional lead smelting system by a belt conveyor, and the tail gas is treated by a three-effect dust remover and is discharged after reaching the standard.

In the existing zinc hydrometallurgy process, lead slag is filtered by a box-type filter press, the moisture of the filtered lead slag is 22-25%, the production requirement cannot be met, and filter residue is conveyed to a storage bin by a belt conveyor after being further dried by a distribution disc, the belt conveyor and a drying kiln. The box-type filter press generates a large amount of gas in the squeezing process, the environment is seriously polluted, potential safety hazards exist when the working pressure of a hydraulic cylinder reaches 17MPa, the water content of filtered filter residue can reach 13.67 percent after the filter residue is dried by a drying kiln, the filter plate and the filter cloth need to be cleaned regularly, the labor cost is increased, a large amount of natural gas needs to be consumed in the drying process of the drying kiln, and the natural gas is consumed in 22300Nm3 every year. The smoke generated in the drying process of the drying kiln is required to be exhausted after being treated by a wet three-effect dust collector, and the exhaust generates a large amount of steam due to high smoke temperature, so that the visual sense is poor, the white fog treatment equipment is required to be further invested, and the cost is higher by adopting the existing filtering mode.

Therefore, new filtering technologies are urgently needed to replace the box filter press.

Disclosure of Invention

In order to overcome the problem existing in the background art, the utility model discloses a novel filter equipment replaces former van-type pressure filter, reduces environmental pollution, shortens sediment processing technology, and energy resource consumption reduces, reduction in production cost.

In order to achieve the purpose, the utility model is implemented according to the following technical scheme: the zinc hydrometallurgy lead slag filtering device comprises an entity base 1, a rotary drum 2, a filter screen 3, a main shaft 4, a bearing 5 and a main motor 6, wherein the rotary drum 2 is installed in the entity base 1 through the main shaft 4 and the bearing 5, the entity base 1 is provided with the main motor 6, the main shaft 4 is driven by the main motor 6 through belt transmission, filter holes are uniformly arranged on the side wall of the rotary drum 2, the filter screen 3 is installed on the inner side wall, a feeding pipe A and a scraping blade 8 are arranged in the rotary drum 2, the scraping blade 8 is driven by an oil cylinder installed at the top of the entity base 1, the side wall of the entity base 1 is provided with a liquid phase overflow port H and a liquid discharge port G, the top of the rotary drum 2 is provided with a liquid blocking plate 11, the middle of the liquid blocking plate 11 is provided with an opening, the bottom of the rotary drum 2 is provided with a solid slag, the base discharge port 13 is connected with the solid-liquid switching discharge hopper 10 through a flexible connection 9.

Preferably, the solid housing 1 is mounted on the mounting surface by means of a damping damper 7.

Preferably, two feeding pipes A are arranged, and the feeding positions of the two feeding pipes A are not at the same height.

Preferably, a material cleaning pipe B and a filter screen cleaning pipe C are arranged in the rotary drum 2, and a rotary drum filter hole cleaning pipe D is arranged outside the rotary drum 2.

The utility model has the advantages that:

the utility model adopts a novel filtering device, reduces the working pressure of the hydraulic cylinder, potential safety hazards brought by equipment and environmental pollution brought by the filter press in the squeezing process; the process for treating the shortened slag comprises the steps of pumping the underflow of a two-stage leaching thickener to a filtering device, and directly conveying the slag with the water content of the filter residue controlled between 13 and 15 percent to a slag bin by using a belt after the slag is filtered by the filtering device, so that the equipment investment is reduced, the energy consumption is low, and the production cost is reduced. The filter screen of the filtering device is convenient to clean, the utilization rate of equipment is improved, and the labor cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention:

in the figure, 1-a solid base, 2-a rotary drum, 3-a filter screen, 4-a main shaft, 5-a bearing, 6-a main motor, 7-a damping shock absorber, 8-a scraper, 9-a flexible connection, 10-a solid-liquid switching hopper, 11-a liquid blocking plate, 12-a solid slag discharge port and 13-a base discharge port; a-feeding pipe, B-material cleaning pipe, C-filter screen cleaning pipe, D-rotary drum filtering hole cleaning pipe, E-solid residue outlet, F-cleaning liquid outlet, G-base liquid outlet and H-liquid phase overflow port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in fig. 1-1, the zinc hydrometallurgy lead slag filtering device comprises an entity base 1, a rotary drum 2, a filter screen 3, a main shaft 4, a bearing 5 and a main motor 6, wherein the entity base 1 is integrally welded, the rotary drum 2 is installed in the entity base 1 through the main shaft 4 and the bearing 5, the main motor 6 is arranged on the entity base 1, the main motor 6 is a variable frequency motor, the main shaft 4 is driven by the main motor 6 through belt transmission, namely, the rotary drum 2 can rotate in the entity base 1 under the drive of the main motor 6, filter holes are uniformly arranged on the side wall of the rotary drum 2, the filter screen 3 is installed on the inner side wall, a feed pipe A and a scraper 8 are arranged in the rotary drum 2, the scraper 8 is connected with a piston rod of an oil cylinder through a connecting rod and a swing arm, the oil cylinder is installed on the top of the entity base 1, a liquid phase, an opening is formed in the middle of the liquid blocking plate 11, a solid slag discharge port 12 is formed in the bottom of the rotary drum 2, a base discharge port 13 corresponding to the solid slag discharge port 12 is formed in the bottom of the solid base 1, a solid-liquid switching discharge hopper 10 is installed on the lower side of the solid base 1, and the base discharge port 13 is connected with the solid-liquid switching discharge hopper 10 through a flexible connection 9.

During the filtering operation, the main motor 6 drives the main shaft 4 to rotate at a high speed through the triangular belt, and simultaneously, the main shaft 4 drives the rotary drum 2 to rotate together. The slurry to be filtered flows into the rotary drum 2 from the feeding pipe A, is distributed on the wall of the rotary drum 2 to rotate at a high speed along with the rotary drum 2 under the action of centrifugal force, so that solid phase and liquid phase in the slurry are layered, coarse particle solid with high specific gravity is attached to the filter screen 3 in the rotary drum 2, liquid phase with low specific gravity and fine particles in the solid move towards the center of the rotary drum 2 under the extrusion of the coarse particles, and along with the increase of feeding amount, the liquid phase is gradually extruded to the opening of the liquid baffle plate 11 at the top of the rotary drum 2 and overflows out of the rotary drum 2 from the opening, and finally is discharged from an overflow port H at the upper part of. When the inner cavity of the rotary drum 2 is completely filled with the solid materials, the feeding is stopped, and the filtering device enters a dehydration stage. At the moment, the rotary drum 2 rotates at a high speed, moisture on the surface of solid particles of the rotary drum 2 is thrown out of the rotary drum 2 from the filtering holes of the rotary drum 2 through the filter screen 3 under the action of centrifugal force, and finally is discharged from a liquid discharge port G at the lower part of the entity machine base 1. After the solid material is dried, the rotary drum 2 rotates at a low speed, at the moment, the scraping blade 8 is driven by the oil cylinder to slowly rotate towards the inner wall of the rotary drum 2, the adhered solid slag is gradually peeled off from the rotary drum 2, the solid slag falls from a solid slag discharge port 12 at the bottom of the rotary drum 2 under the action of gravity and enters a base discharge port 13, and enters a solid-liquid switching discharge hopper 10 through the base discharge port 13 and a flexible connection 9, and finally is discharged from a solid slag outlet E on the solid-liquid switching discharge hopper 10 and is sent into a solid material collecting tank for collection, so that the discharge is completed.

The entity frame 1 is installed on the installation foundation through the damping shock absorber 7, and the damping shock absorber 7 can isolate vibration and only transmit the minimum residual vibration force to the installation foundation.

The two feeding pipes A are arranged, the feeding positions of the two feeding pipes A are not at the same height, the feeding can be simultaneously carried out on the upper part and the lower part in the rotary drum 2, the feeding is uniform, and the filtering quality and the filtering efficiency are improved; until the liquid phase overflows in the drum 2, at which point the upper feed pipe a is closed and feeding continues with the lower feed pipe a only, until the drum 2 is filled with solids.

Be equipped with material scavenge pipe B and filter screen scavenge pipe C in the rotary drum 2, the 2 outsides of rotary drum are equipped with the rotary drum and filter hole scavenge pipe D. After the filtering operation is completed, the material in the rotary drum 2 cannot be completely scraped out by the scraping blade 8, at the moment, the material cleaning pipe B is adopted to clean the residual material in the rotary drum, the cleaned material enters the solid-liquid switching discharge hopper 10 through the base discharge port 13 and the flexible connection 9, and finally is discharged from the solid slag outlet E on the solid-liquid switching discharge hopper 10. After several batches of work, the filter openings of the screen 3 are gradually blocked by fine solid particles, which requires thorough cleaning of the screen 3 and of the drum 2. During cleaning, the rotary drum 2 is controlled to rotate at a low speed, the filter screen cleaning valve is opened, high-pressure cleaning water is used for thoroughly cleaning filter holes in the filter screen 3 and the rotary drum 2 through the filter screen cleaning pipe C and the rotary drum filter hole cleaning pipe D, meanwhile, the solid-liquid switching discharge hopper 10 is switched to a wet position, and cleaning liquid sequentially passes through the solid slag discharge port 12, the base discharge port 13 and the flexible connection 9 to enter the solid-liquid switching discharge hopper 10 and is discharged from the cleaning liquid outlet F.

The lip seal and the shaft sleeve are adopted to seal and isolate the transmission part of the main shaft 4 from a working area, and the sealing performance is good.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims (4)

1. A zinc hydrometallurgy lead slag filter equipment which is characterized in that: the lead slag filtering device for zinc hydrometallurgy comprises an entity base (1), a rotary drum (2), a filter screen (3), a main shaft (4), a bearing (5) and a main motor (6), wherein the rotary drum (2) is installed in the entity base (1) through the main shaft (4) and the bearing (5), the main motor (6) is arranged on the entity base (1), the main shaft (4) is driven by the main motor (6) through belt transmission, filter holes are uniformly arranged on the side wall of the rotary drum (2), the filter screen (3) is installed on the inner side wall, a feeding pipe (A) and a scraping blade (8) are arranged in the rotary drum (2), the scraping blade (8) is driven by an oil cylinder installed at the top of the entity base (1), a liquid phase overflow port (H) and a liquid discharge port (G) are arranged on the side wall of the entity base (1), a liquid blocking plate (11) is arranged at the top of the rotary drum (2), an opening, the bottom of the solid base (1) is provided with a base discharge port (13) corresponding to the solid slag discharge port (12), the lower side of the solid base (1) is provided with a solid-liquid switching discharge hopper (10), and the base discharge port (13) is connected with the solid-liquid switching discharge hopper (10) through a flexible connection (9).

2. The zinc hydrometallurgical lead slag filtering device of claim 1, wherein: the solid base (1) is arranged on the installation surface through a damping shock absorber (7).

3. The zinc hydrometallurgical lead slag filtering device of claim 1, wherein: the two feeding pipes (A) are arranged, and the feeding positions of the two feeding pipes (A) are not at the same height.

4. The zinc hydrometallurgical lead slag filtering device of claim 1, wherein: a material cleaning pipe (B) and a filter screen cleaning pipe (C) are arranged in the rotary drum (2), and a rotary drum filter hole cleaning pipe (D) is arranged on the outer side of the rotary drum (2).

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