Dissolving and filtering system for rare earth ore

Abstract

The utility model relates to a rare earth ore dissolving and filtering system which comprises an acid tank, an acid dissolving reaction kettle, a first filter, a first liquid lifting device, a primary slag filter press, a secondary dissolving reaction kettle, a second filter, a second liquid lifting device and a secondary slag filter press which are connected in sequence, the acid dissolution reaction kettle, the first filter, the first liquid lifting device and the primary slag filter press form primary dissolution filtration, and the secondary dissolution reaction kettle, the second filter, the second liquid lifting device and the secondary slag filter press form secondary dissolution filtration; the acid dissolution reaction kettle is communicated to the first filter; the first filter comprises an inclined cylinder body, and a feeding hole in the front part of the cylinder body is communicated with the material guide pipe; a slag outlet in the rear end of the cylinder body is connected with a slag guide pipe; the slag guide pipe is connected into a slag collecting groove; a filtering fence inner cylinder is arranged in the cylinder body; and the cylinder body is connected to a liquid lifting device through a liquid guide pipe. According to the utility model, impurities are effectively removed, waste of rare earth ore raw materials is reduced, rare earth elements are extracted to the greatest extent, and the product yield is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rare earth production technical field especially relates to a rare earth ore's dissolving filter system. BACKGROUND

[0002] The rare earth ore's dissolving process first prepares rare earth chloride solution: the rare earth ore (rare earth oxide), hydrochloric acid and water are put into the reaction kettle with stirring device and are stirred, and the weight ratio of rare earth oxide, hydrochloric acid and water and the pH value in the reaction process are controlled, so that most of the rare earth oxide reacts with hydrochloric acid to generate chloride solution containing rare earth ions.

[0003] The solid-liquid mixed acid-soluble material liquid slag generated after the acid-soluble reaction is generally filtered by a filter screen to collect liquid products, and the acid-soluble reaction is incomplete, resulting in a certain amount of large particles in the acid-soluble slag, which is difficult to dissolve and easily blocks the filter screen, so that the material liquid cannot pass through the filter screen, causing the material liquid to overflow, resulting in waste of raw materials, and the filter residue after filtering by the filter screen still contains a large amount of rare earth elements, and the existing technology cannot maximize the recovery of rare earth elements in the rare earth ore raw materials after simple filtering after acid-soluble, greatly reducing the yield and product quality. SUMMARY

[0004] The utility model discloses a rare earth ore's dissolving filter system adds squirrel-cage type filter and liquid throwing device to avoid blockage, improve yield, avoid raw material waste and reduce production cost.

[0005] The utility model discloses a rare earth ore's dissolving filter system adds squirrel-cage type filter and liquid throwing device to avoid blockage, improve yield, avoid raw material waste and reduce production cost.

[0006] A rare earth ore's dissolving filter system, it includes acid tank, acid-soluble reaction kettle, first filter and first liquid throwing device, primary slag filter press, secondary dissolving reaction kettle, second filter, second liquid throwing device and secondary slag filter press that are connected in proper order, and the acid-soluble reaction kettle, first filter, first liquid throwing device and primary slag filter press form primary dissolving filtration, and the secondary dissolving reaction kettle, second filter, second liquid throwing device and secondary slag filter press form secondary dissolving filtration.

[0007] The bottom of the kettle body is provided with a discharge port, and the discharge port is communicated to the second filter through a material guide pipe.

[0008] The second filter comprises a cylinder body arranged obliquely, the front end of the cylinder body is higher than the rear end of the cylinder body, the cylinder body is arranged on a supporting base, the front end and the rear end of the supporting base support the front end and the rear end of the cylinder body through supporting columns respectively, a feeding port is arranged at the front part of the cylinder body, the feeding port is communicated with a guide pipe through a feeding pipe, a slag discharging port is arranged at the rear end of the cylinder body, the slag discharging port is connected with one end of a slag guide pipe, the other end of the slag guide pipe is connected into a slag collecting groove, a filter fence inner cylinder is arranged in the cylinder body, the filter fence inner cylinder is connected with a rotating motor, and the rotating motor is arranged on the outer wall of the cylinder body.

[0009] A liquid outlet is further arranged on the cylinder body, the liquid outlet is arranged below the middle part of the filter fence inner cylinder, the liquid outlet is connected with a liquid outlet pipe, the liquid outlet pipe is communicated with a liquid guide pipe, and the liquid guide pipe is connected with the liquid inlet of a liquid lifting device.

[0010] The structure of the second filter is same as that of the first filter.

[0011] Further, a driving motor is arranged at the center of the top of the kettle body, the driving motor is connected with a stirring shaft, the stirring shaft is arranged on the inner central shaft of the kettle body, an upper stirring rod is arranged at the right middle part of the stirring shaft, and an upper stirring blade is arranged at the left middle part of the stirring shaft, the upper stirring rod is inclined downward, the upper stirring blade is inclined upward, and the upper stirring rod and the upper stirring blade are arranged on the same axis.

[0012] Further, a lower stirring rod is arranged at the left bottom of the stirring shaft, and a lower stirring blade is arranged at the right bottom of the stirring shaft, the lower stirring rod is inclined downward, the lower stirring blade is inclined upward, and the lower stirring rod and the lower stirring blade are arranged on the same axis.

[0013] Further, a plurality of groups of scraper plates are arranged on the inner wall of the kettle body.

[0014] Further, a discharging plug valve is arranged between the liquid outlet pipe and the liquid guide pipe of the second filter, so as to control the opening and closing of the discharging end.

[0015] Further, a discharging pressure sensor is arranged on the liquid outlet pipe of the second filter, so as to detect the pressure of the discharging flow.

[0016] Further, a kettle body of the secondary dissolution reaction kettle is provided with a heating device, so as to heat during secondary dissolution.

[0017] Further, the secondary dissolution reaction kettle is further connected with a strong acid tank, so as to add strong acid during secondary dissolution.

[0018] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0019] The utility model provides a rare earth ore's dissolving filtration system sets two dissolving filters, when once dissolving filter, in the acid -soluble reaction cauldron through double -deck stirring vane and stirring rod and inner wall scraper fully stirs and dissolves, reduces big granule solid material slag, connects the squirrel -cage filter at the discharge gate of acid -soluble reaction cauldron, and solid slag material is guided to the slag outlet of filter cylinder oblique rear end through the rotation attractive force and self -gravity of filter fence inner cylinder, and the liquid material of separation is guided to the liquid -raising device, then carries out secondary dissolving filtration, the utility model discloses effectively filter impurity, can recycle the vast majority of rare earth element in rare earth ore, reduces the waste of rare earth ore raw material, extracts rare earth element to the maximum extent, and basically does not contain non -rare earth metal ion, improves product yield and quality, the utility model discloses still have the advantages such as big processing capacity, simple processing step, can realize the application of industrialization. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the utility model.

[0021] Figure 2 It is the structure schematic diagram of the acid -soluble reaction cauldron of the utility model.

[0022] Figure 3 It is the structure schematic diagram of the first filter of the utility model.

[0023] Among them:

[0024] Acid tank 1, acid -soluble reaction cauldron 2, cauldron body 2.1, stirring shaft 2.2, drive motor 2.3, upper stirring rod 2.4, upper stirring vane 2.5, lower stirring rod 2.6, lower stirring vane 2.7, scraper 2.8, discharge gate 2.9, first filter 3, cylinder 3.1, feed pipe 3.2, filter fence inner cylinder 3.3, rotating motor 3.4, liquid outlet pipe 3.5, discharge pressure sensor 3.6, discharge plug valve 3.7, support base 3.8, slag collecting groove 4, first liquid -raising device 5, once slag filter press 6, secondary dissolving reaction cauldron 7, second filter 8, second liquid -raising device 9, secondary slag filter press 10. DETAILED DESCRIPTION

[0025] For better understanding the technical scheme of the utility model, the following will combine relevant drawing and make detailed explanation.It should be understood that the following specific embodiment is not used to limit the specific implementation state of the technical scheme of the utility model, it is only the implementation state that the technical scheme of the utility model can adopt.It needs to be explained first, the expression of the position relation of each component in this article, such as A component is located above B component, is based on the expression of the relative position of each component in the drawing, and is not used to limit the actual position relation of each component. Example 1

[0026] See Figures 1-3 , Figure 1The structure schematic diagram of the utility model is drawn. As shown in the drawing, the utility model relates to a kind of rare earth ore's dissolving filtration system, it includes acid tank 1, acid-dissolving reaction kettle 2, first filter 3, first liquid lifting device 5, primary residue filter press 6, secondary dissolving reaction kettle 7, second filter 8, second liquid lifting device 9 and secondary residue filter press 10 connected in sequence, acid-dissolving reaction kettle 2, first filter 3, first liquid lifting device 5 and primary residue filter press 6 form primary dissolving filtration, secondary dissolving reaction kettle 7, second filter 8, second liquid lifting device 9 and secondary residue filter press 10 form secondary dissolving filtration.

[0027] The acid-dissolving reaction kettle 2 includes kettle body 2.1, the top center of the kettle body 2.1 is provided with a driving motor 2.3, the driving motor 2.3 is connected to a stirring shaft 2.2, the stirring shaft 2.2 is arranged on the inner central axis of the kettle body 2.1, the middle right side of the stirring shaft 2.2 is provided with an upper stirring rod 2.4, and the left side is provided with an upper stirring blade 2.5, the upper stirring rod 2.4 is inclined downward, the upper stirring blade 2.5 is inclined upward, and the upper stirring rod 2.4 and the upper stirring blade 2.5 are located on the same axis; the bottom left side of the stirring shaft 2.2 is provided with a lower stirring rod 2.6, and the right side is provided with a lower stirring blade 2.7, the lower stirring rod 2.6 is inclined downward, the lower stirring blade 2.7 is inclined upward, and the lower stirring rod 2.6 and the lower stirring blade 2.7 are located on the same axis;

[0028] The inner wall of the kettle body 2.1 is provided with a plurality of groups of parallelly arranged scrapers 2.8; the bottom of the kettle body 2.1 is provided with a discharge port 2.9, and the discharge port 2.9 is communicated to the first filter 3 through a material guide pipe.

[0029] The first filter 3 includes an inclined cylinder 3.1, the front end of the cylinder 3.1 is higher than the rear end of the cylinder 3.1, the cylinder 3.1 is arranged on a supporting base 3.8, and the front end and the rear end of the supporting base 3.8 support the front end and the rear end of the cylinder 3.1 through supporting columns respectively;

[0030] The front part of the cylinder 3.1 is provided with a feeding port, and the feeding port is communicated with the material guide pipe through a feeding pipe 3.2; the rear end of the cylinder 3.1 is provided with a residue discharge port, and the residue discharge port is connected to one end of a residue guide pipe, and the other end of the residue guide pipe is connected to a residue collecting groove 4;

[0031] The cylinder 3.1 is provided with a filter fence inner cylinder 3.3, the filter fence inner cylinder 3.3 is connected to a rotating motor 3.4, the rotating motor 3.4 is arranged on the outer wall of the cylinder 3.1, and drives the filter fence inner cylinder 3.3 to rotate in the cylinder 3.1, forming a squirrel-cage type filter structure;

[0032] The cylinder 3.1 is further provided with a liquid outlet arranged below the middle part of the filter fence inner cylinder 3.3, which is connected to one end of a liquid outlet pipe 3.5, and the other end of the liquid outlet pipe 3.5 is provided with a discharge plug valve 3.7 for controlling the opening and closing of the discharge end, and the liquid outlet pipe 3.5 is provided with a discharge pressure sensor 3.6 for detecting the pressure of the discharge flow; the liquid outlet pipe 3.5 is connected to the liquid guide pipe through the discharge plug valve 3.7, and the liquid guide pipe is connected to the liquid inlet of the first liquid lifting device 5.

[0033] The discharge pressure sensor 3.6 is electrically connected to the alarm through the control circuit, and the discharge plug valve 3.7 is a hydraulic plug valve.

[0034] The second filter 8 has the same structure as the first filter 3.

[0035] The outer wall of the secondary dissolution reaction kettle 7 is provided with a heating device for heating during secondary dissolution, and the secondary dissolution reaction kettle 7 is further connected to a strong acid tank for adding strong acid during secondary dissolution.

[0036] Working principle:

[0037] The utility model provides a kind of dissolution filtration system of rare earth ore, and two dissolution filtrations are set, when primary dissolution filtration, in acid-dissolving reaction kettle, it is fully stirred and dissolved by double-layer stirring blade and stirring rod and inner wall scraper, reduce large particle solid residue, connect squirrel-cage filter at the discharge port of acid-dissolving reaction kettle, solid-liquid separation is carried out to acid-dissolving residue, solid residue is guided to the slag outlet of filter cylinder inclined rear end by the rotation attraction of filter fence inner cylinder and its gravity, and liquid material is guided to the first liquid lifting device after separation, liquid is lifted to primary residue filter press by the first liquid lifting device, after secondary solid-liquid separation by primary residue filter press, liquid is collected, and a small amount of rare earth elements is contained in solid, secondary dissolution filtration is carried out again, and solid material of primary residue filter press is guided into secondary dissolution reaction kettle, and is heated and acidified to carry out secondary dissolution again, and filtration is carried out again.The utility model effectively filters impurities, reduces the waste of rare earth ore raw materials, extracts rare earth elements to the greatest extent, and improves product yield and quality.

[0038] The above is only a specific application example of the utility model, and does not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A leaching system for rare earth ores, characterized by: It includes acid tank (1), acid solution reaction kettle (2), first filter (3) and first liquid ejector (5), first residue filter press (6), secondary dissolution reaction kettle (7), second filter (8), second liquid ejector (9) and secondary residue filter press (10) connected in turn, acid solution reaction kettle (2), first filter (3), first liquid ejector (5) and first residue filter press (6) form a first dissolution filtration, secondary dissolution reaction kettle (7), second filter (8), second liquid ejector (9) and secondary residue filter press (10) form a second dissolution filtration; The acid solution reaction kettle (2) comprises a kettle body (2.1), a discharge port (2.9) is arranged at the bottom of the kettle body (2.1), and the discharge port (2.9) is communicated with the first filter (3) through a guide pipe; The first filter (3) comprises an inclined cylinder (3.1), the front end of the cylinder (3.1) is higher than the rear end of the cylinder (3.1), the cylinder (3.1) is arranged on a supporting base (3.8), and the front end and the rear end of the supporting base (3.8) support the front end and the rear end of the cylinder (3.1) through supporting columns; a feed inlet is arranged at the front part of the cylinder (3.1), the feed inlet is communicated with the guide pipe through a feed pipe (3.2); a residue discharge port is arranged at the rear end of the cylinder (3.1), one end of the residue discharge port is connected with a residue guide pipe, and the other end of the residue guide pipe is connected with a residue collecting groove (4); a filter grid inner cylinder (3.3) is arranged in the cylinder (3.1), the filter grid inner cylinder (3.3) is connected with a rotating motor (3.4), and the rotating motor (3.4) is arranged on the outer wall of the cylinder (3.1); A liquid outlet is further arranged on the cylinder (3.1), the liquid outlet is arranged below the middle part of the filter grid inner cylinder (3.3), the liquid outlet is connected with a liquid outlet pipe (3.5), the liquid outlet pipe (3.5) is communicated with a liquid guide pipe, and the liquid guide pipe is connected with the liquid inlet of the first liquid ejector (5); The second filter (8) has the same structure as the first filter (3).

2. The leaching system of rare earth ore according to claim 1, characterized in that: A driving motor (2.3) is arranged at the top center of the kettle body (2.1), the driving motor (2.3) is connected with a stirring shaft (2.2), the stirring shaft (2.2) is arranged on the inner central shaft of the kettle body (2.1), an upper stirring rod (2.4) is arranged at the right side of the middle part of the stirring shaft (2.2), and an upper stirring blade (2.5) is arranged at the left side of the middle part of the stirring shaft (2.2), the upper stirring rod (2.4) is inclined downward, the upper stirring blade (2.5) is inclined upward, and the upper stirring rod (2.4) and the upper stirring blade (2.5) are located on the same axis.

3. The leaching system of rare earth ore according to claim 2, characterized in that: A lower stirring rod (2.6) is arranged at the left side of the bottom of the stirring shaft (2.2), and a lower stirring blade (2.7) is arranged at the right side of the bottom of the stirring shaft (2.2), the lower stirring rod (2.6) is inclined downward, the lower stirring blade (2.7) is inclined upward, and the lower stirring rod (2.6) and the lower stirring blade (2.7) are located on the same axis.

4. The system for dissolving and filtering rare earth ore according to claim 1, wherein: The inner wall of the kettle body (2.1) is provided with a plurality of groups of parallelly arranged scrapers (2.8).

5. The leaching system of rare earth ore according to claim 1, characterized in that: The outlet pipe (3.5) of the first filter (3) is provided with a discharge plug valve (3.7) for controlling the opening and closing of the discharge end.

6. The leaching system of rare earth ore according to claim 1, characterized in that: The outlet pipe (3.5) of the first filter (3) is provided with a discharge pressure sensor (3.6) for detecting the pressure of the discharge flow.

7. The system for dissolving and filtering rare earth ore according to claim 1, wherein: The outer wall of the kettle body of the secondary dissolution reaction kettle (7) is provided with a heating device for heating during secondary dissolution.

8. The system for dissolving and filtering rare earth ore according to claim 1, wherein: The secondary dissolution reaction kettle (7) is also connected to a strong acid tank for adding strong acid during secondary dissolution.

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