Feeding device for in-situ leaching uranium mining belt type vacuum filter

Abstract

The utility model provides a feeding device of a belt type vacuum filter for in-situ leaching uranium mining, and relates to the technical field of in-situ leaching uranium mining, the feeding device comprises a feeding box, the feeding box is provided with a feeding port and a discharging port, the feeding port is arranged at the top of the feeding box, and the discharging port is arranged at the bottom of the feeding box; the material uniformizing assembly comprises an overflow weir, and the overflow weir is vertically arranged at the position, close to the discharging opening, in the feeding box; the rolling brush assembly comprises rolling brush arms and a flow guide rolling brush, the rolling brush arms are arranged on the two sides of the discharging port respectively, the two ends of the flow guide rolling brush are rotationally connected with the rolling brush arms on the two sides respectively, and the flow guide rolling brush is used for making contact with the upper surface of filter cloth of the in-situ leaching uranium mining belt type vacuum filter. According to the utility model, the distribution uniformity of filter cakes produced after the uranium-rich slurry on the filter cloth is subjected to suction filtration is improved, so that the treatment efficiency and the product quality of subsequent in-situ leaching uranium mining products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of in-situ uranium leaching, in particular to a feeding device for a belt vacuum filter for in-situ uranium leaching. Background Art

[0002] The traditional preparation of sodium diuranate yellowcake products is mainly through the extrusion and dehydration of uranium-rich slurry by plate and frame filter press. After each plate and frame operation of the plate and frame filter press, it is often necessary to manually peel off the residual products on the filter plate and filter cloth, which has a low degree of automation and high labor intensity; at the same time, since it is a positive pressure device (the pressure is generally 0.6-1.2MPa), the loss of filter cloth during operation is relatively large. The applicant thought of using a horizontal belt vacuum filter to process the uranium-rich slurry. However, the horizontal belt vacuum filter in the prior art has a single feed structure and is not suitable for the feed processing of uranium-rich slurry, resulting in low production efficiency of sodium diuranate yellowcake products and the treated sodium diuranate yellowcake products cannot meet the specified standards. Utility Model Content

[0003] The purpose of the utility model is to provide a feeding device for a belt vacuum filter for in-situ leaching of uranium to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] The present application provides a feeding device for a belt vacuum filter for in-situ leaching of uranium, comprising:

[0005] A feed box, wherein the feed box is provided with a feed inlet and a discharge outlet, the feed inlet is arranged at the top of the feed box, and the discharge outlet is arranged at the bottom of the feed box;

[0006] A material leveling assembly, the material leveling assembly comprising an overflow weir, the overflow weir being vertically arranged in the feed box at a position close to the discharge port;

[0007] A roller brush assembly, the roller brush assembly includes a roller brush arm and a guide roller brush, the roller brush arms are respectively provided on both sides of the discharge port, the two ends of the guide roller brush are respectively rotatably connected to the roller brush arms on both sides, and the guide roller brush is used to contact the upper surface of the filter cloth of the in-situ leaching uranium belt vacuum filter.

[0008] The beneficial effects of the utility model are:

[0009] The utility model uses a feeding device for an in-situ uranium belt vacuum filter to uniformly treat and guide the uranium-rich slurry entering the in-situ uranium belt vacuum filter in advance, thereby improving the distribution uniformity of the filter cake produced after the uranium-rich slurry is filtered on the filter cloth, thereby improving the processing efficiency and product quality of subsequent in-situ uranium products.

[0010] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the embodiments of the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic structural diagram of a feeding device for a belt vacuum filter used for in-situ leaching of uranium in an embodiment of the utility model.

[0013] Figure 2 It is a cross-sectional view of a feeding device of a belt vacuum filter used for in-situ leaching of uranium in an embodiment of the utility model.

[0014] Markings in the figure: 1. Feed valve; 2. Feed box; 3. Discharge baffle; 4. Base rib plate; 5. Fastening bolts; 6. Roller brush arm; 7. Guide roller brush; 8. Filter cloth; 9. Overflow weir; 10. Discharge valve; 11. Flow meter; 12. Discharge port. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0016] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0017] Since the negative pressure at each point in the filtration area of ​​the belt filter is the same, the uniform distribution of the solid-liquid mixture feed is required to be high: if the thickness of the raw materials in the filtration area is uneven, the thinner area is prone to "filtration penetration", causing negative pressure leakage, greatly affecting the overall filtration effect; the negative pressure in the thicker area is difficult to conduct, forming a filter cake that is wet on the top and dry on the bottom, resulting in the final product The moisture content exceeds the standard (the product moisture should be <30%). Due to the particularity of the properties of in-situ leaching uranium products, their particle size is small, dense and delicate, and the slurry has a high viscosity. When it flows from the feed port to the filter cloth, it is difficult to form a uniform plane by self-flow, resulting in difficulty in ensuring the processing efficiency and product quality. Therefore, a feeding device and operating method for an in-situ leaching uranium belt vacuum filter are urgently needed to ensure the efficiency and uniformity of the overall feeding of the belt filter.

[0018] The embodiment of the utility model provides a feeding device for a belt vacuum filter for in-situ leaching of uranium, comprising:

[0019] A feed box 2, wherein the feed box 2 is provided with a feed port and a discharge port 12, wherein the feed port is arranged at the top of the feed box 2, and the discharge port 12 is arranged at the bottom of the feed box 2;

[0020] A material leveling assembly, the material leveling assembly comprising an overflow weir 9, the overflow weir 9 being vertically arranged in the feed box 2 at a position close to the discharge port 12;

[0021] A roller brush assembly, the roller brush assembly includes a roller brush arm 6 and a guide roller brush 7. The roller brush arms 6 are respectively provided on both sides of the discharge port 12. The two ends of the guide roller brush 7 are rotatably connected to the roller brush arms 6 on both sides. The guide roller brush 7 is used to contact the upper surface of the filter cloth 8 of the in-situ leaching uranium belt vacuum filter.

[0022] The material leveling assembly further includes a discharge baffle 3 and a spacing adjustment member. The discharge baffle 3 is disposed at the discharge port 12 , and the spacing adjustment member is used to adjust the spacing between the bottom of the discharge baffle 3 and the inner bottom surface of the discharge port 12 .

[0023] The discharge port 12 is connected to a discharge channel which is arranged obliquely downward, and a slot for inserting the discharge baffle 3 is provided at the top of the discharge channel. The spacing adjustment member includes a fixing member and a tightening bolt 5. The fixing member is fixed to the top of the discharge channel and is arranged parallel to the discharge baffle 3. The tightening bolt 5 is threadedly connected to the threaded hole on the fixing member, and the other end of the tightening bolt 5 abuts against the discharge baffle 3.

[0024] The cross section of the discharge channel is a rectangular opening.

[0025] The feed port is connected to a vertically arranged feed pipe, and a feed flow meter 11 and a feed valve 1 are arranged on the feed pipe.

[0026] The feed box 2 is also provided with a discharge port and a discharge valve 10. The discharge valve 10 is arranged at the discharge port. The discharge port and the discharge port 12 are respectively arranged on different sides of the bottom of the feed box 2. When the discharge valve 10 is fully opened, the lowest flow surface is flush with the inner bottom surface of the feed box 2.

[0027] Base ribs 4 are respectively provided on both sides of the outer surface of the feed box 2, and the base ribs 4 are used to connect to the base of the in-situ leaching uranium belt vacuum filter.

[0028] The roller brush arms 6 on both sides are rotatably connected to one side of the corresponding discharge port 12 respectively.

[0029] The overflow weir 9 is a strip-shaped baffle, and the bottom end of the overflow weir 9 is bonded or welded to the inner bottom surface of the feed box 2 .

[0030] The guide roller brush 7 is evenly distributed with bristles made of PA material or nylon material.

[0031] Combination Figure 1 and Figure 2 As shown, a feeding device for a belt vacuum filter for in-situ leaching of uranium includes a feeding box 2, an overflow weir 9, a roller brush arm 6, a guide roller brush 7, a discharge baffle 3, a discharge channel, a feeding pipe, a fixing bolt 5, a discharge port, a discharge valve 10, and a base rib 4.

[0032] The feed box 2 is provided with a feed port and a discharge port 12. The feed box 2 is a cube-like material made of steel or other transparent material with sufficient strength. The feed port is arranged at the top of the feed box 2, and the discharge port 12 is arranged at the bottom of the feed box 2.

[0033] The overflow weir 9 is vertically arranged in the feed box 2 near the discharge port 12. The overflow weir 9 is a strip-shaped baffle. The bottom end of the overflow weir 9 is bonded or welded to the inner bottom surface of the feed box 2.

[0034] The discharge port 12 is connected to a discharge channel arranged obliquely downward, the cross section of the discharge channel is a rectangular opening, the width of the discharge channel is close to the width of the filter cloth 8, and the outlet of the discharge channel faces the filter cloth 8;

[0035] The roller brush arms 6 are respectively provided on both sides of the discharge channel, and the roller brush arms 6 on both sides are rotatably connected to the corresponding side of the discharge channel through a rotating shaft, and the two ends of the guide roller brush 7 are rotatably connected to the roller brush arms 6 on both sides, and the guide roller brush 7 is used to contact the upper surface of the filter cloth 8 of the belt vacuum filter for in-situ leaching uranium. The guide roller brush 7 is evenly distributed with bristles made of PA material or nylon material;

[0036] A long slot is provided at the top of the discharge channel, and a discharge baffle 3 is vertically inserted into the slot. The discharge baffle 3 is disposed at the discharge port 12. The spacing adjustment member is used to adjust the spacing between the bottom of the discharge baffle 3 and the inner bottom surface of the discharge port 12. The spacing adjustment member includes a fixing member and a tightening bolt 5. The fixing member is fixed to the top of the discharge channel and is arranged parallel to the discharge baffle 3. A screw hole is provided on the fixing member. The tightening bolt 5 is horizontally inserted through the screw hole and is threadedly connected to the screw hole. The tightening bolt 5 is threadedly connected to the threaded hole on the fixing member, and another section of the tightening bolt 5 abuts against the discharge baffle 3. Therefore, by adjusting the tightness between the tightening bolt 5 and the discharge baffle 3, the height of the discharge baffle 3 in the vertical direction can be further adjusted, thereby realizing the adjustment of the flow rate and uniformity of the uranium-enriched slurry passing through the discharge baffle 3;

[0037] The feed port is connected with a vertically arranged feed pipe, and a feed flow meter 11 and a feed valve 1 are arranged on the feed pipe. The feed flow meter 11 can be selected from one of an ultrasonic flow meter, an electromagnetic flow meter, a turbine flow meter, and a slurry flow meter, which is not easily blocked by viscous slurry, has reliable accuracy, and can measure and display a small flow rate. The feed valve 1 can be selected from a ball valve, a solenoid valve, a gate valve, a ball valve, a butterfly valve, and other valves capable of fine-tuning the flow rate;

[0038] The feed box 2 is also provided with a discharge port and a discharge valve 10. The discharge valve 10 is arranged at the discharge port. The discharge port and the discharge port 12 are respectively arranged on different sides of the bottom of the feed box 2. When the discharge valve 10 is fully opened, the lowest flow surface is flush with the inner bottom surface of the feed box 2. The discharge valve 10 is a common ball valve.

[0039] Base ribs 4 are respectively provided on both sides of the outer surface of the feed box 2, and the base ribs 4 are used to connect to the base of the in-situ leaching uranium belt vacuum filter.

[0040] The utility model also provides a feeding method for the feeding device of the in-situ leaching uranium belt vacuum filter, comprising the following steps:

[0041] The required feed flow rate is calculated based on the movement speed of the filter cloth 8, the length of the filter cloth 8 in the filtration zone of the in-situ leaching uranium belt vacuum filter, the required filter cake thickness, the width of the discharge port 12 and the residence time of the uranium-rich slurry in the filtration zone of the in-situ leaching uranium belt vacuum filter;

[0042] For example, if the moving speed v of the filter cloth is known to be 0.006 m / s, the length L of the filter cloth in the filtration zone of the in-situ leaching uranium belt vacuum filter is 5 m, and the required filter cake thickness d is 0.3-0.6 cm (the optimal filtration cake thickness depends on the slurry characteristics), if the width w of the discharge port is 50 cm (less than or equal to the width of the filter cloth filtration zone), the residence time of the raw material on the filter cloth is calculated to be t = L / v, the residence time t is 833 s, and the volume of the filter cake after flattening is V = L*w*d, thus the total volume V of the filter cake is calculated to be 0.0075 m 3 -0.015m 3 , feed rate Q = V / t, so the feed slurry flow rate is calculated to be: 0.0324-0.0648m 3 / h.

[0043] Close the discharge valve 10 to prevent the slurry from flowing out directly from the discharge port, open the feed valve 1, and adjust the feed valve to the required feed flow rate;

[0044] For example, adjust the flow rate calculated in the previous step to 0.0324-0.0648m 3 / h, considering the flow meter measurement error, it can be adjusted to the average value of this range 0.0486m 3 / h;

[0045] The height of the discharge baffle is adjusted by tightening the bolts 5 to keep the uranium-rich slurry flowing out evenly from the outlet gap between the bottom of the discharge baffle 3 and the inner bottom surface of the discharge port, thereby keeping the feed and discharge consistent, maintaining the liquid level inside the feed box 2 unchanged, and keeping the system stable;

[0046] Lower the roller brush arm 6 and the guide roller brush 7, so that the guide roller brush 7 contacts the filter cloth 8 and rotates accordingly with the movement of the filter cloth 8;

[0047] The above operation process is maintained until the processing capacity of the belt vacuum filter for in situ leaching uranium reaches the standard;

[0048] After the processing volume reaches the standard, the feed valve 1 is closed and the discharge valve 10 is opened to allow the uranium-rich slurry in the overflow weir 9 to flow out in large quantities. This step prevents the slurry from filling the overflow weir 9 after drying, and the overflow weir 9 loses its uniform overflow function when used next time, resulting in poor feeding effect;

[0049] Then, the filter cloth 8 is kept moving until all the slurry on the filter cloth 8 passes through the roller brush, and finally the roller guide roller brush 7 is lifted, and the dehydration operation of the uranium-rich slurry is completed, and finally the sodium diuranate yellow cake product is obtained.

[0050] This embodiment uses a feeding device and an operating method for a belt vacuum filter for in-situ uranium leaching, thereby eliminating the manual scraping of the slurry. The triple uniform distribution of the filter cake on the filter cloth can be accurately improved through the overflow weir, the discharge baffle, and the guide roller brush, thereby improving the efficiency and product quality of in-situ uranium leaching product processing.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0052] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A feeding device for a belt vacuum filter for in-situ leaching of uranium, characterized in that: include: A feed box (2), the feed box (2) being provided with a feed inlet and a discharge outlet (12), the feed inlet being arranged at the top of the feed box (2), and the discharge outlet (12) being arranged at the bottom of the feed box (2); A material leveling assembly, the material leveling assembly comprising an overflow weir (9), the overflow weir (9) being vertically arranged in the feed box (2) at a position close to the discharge port (12); A roller brush assembly, the roller brush assembly comprising a roller brush arm (6) and a guide roller brush (7), the roller brush arms (6) being respectively arranged on both sides of the discharge port (12), the two ends of the guide roller brush (7) being respectively rotatably connected to the roller brush arms (6) on both sides, and the guide roller brush (7) being used to contact the upper surface of the filter cloth (8) of the belt vacuum filter for in-situ leaching uranium.

2. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: The material leveling assembly further comprises a discharge baffle (3) and a spacing adjustment member, wherein the discharge baffle (3) is arranged at the discharge port (12), and the spacing adjustment member is used to adjust the spacing between the bottom of the discharge baffle (3) and the inner bottom surface of the discharge port (12).

3. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 2, characterized in that: The discharge port (12) is connected to a discharge channel arranged obliquely downward, and a slot for inserting the discharge baffle (3) is provided at the top of the discharge channel. The spacing adjustment member comprises a fixing member and a fixing bolt (5), and the fixing member is fixed to the top of the discharge channel and arranged parallel to the discharge baffle (3). The fixing bolt (5) is threadedly connected to a threaded hole on the fixing member, and another section of the fixing bolt (5) abuts against the discharge baffle (3).

4. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 3, characterized in that: The cross section of the discharge channel is a rectangular opening.

5. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: The feed port is connected to a vertically arranged feed pipe, and a feed flow meter (11) and a feed valve (1) are provided on the feed pipe.

6. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: The feed box (2) is also provided with a discharge port and a discharge valve (10), wherein the discharge valve (10) is arranged at the discharge port, and the discharge port and the discharge port (12) are respectively arranged on different sides of the bottom of the feed box (2), and when the discharge valve (10) is fully opened, the lowest flow surface is flush with the inner bottom surface of the feed box (2).

7. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: Base ribs (4) are respectively provided on both sides of the outer surface of the feed box (2), and the base ribs (4) are used to connect to the base of the in-situ uranium belt vacuum filter.

8. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 7, characterized in that: The roller brush arms (6) on both sides are rotatably connected to one side of the corresponding discharge port (12).

9. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: The overflow weir (9) is a strip-shaped baffle, and the bottom end of the overflow weir (9) is bonded or welded to the inner bottom surface of the feed box (2).

10. The feeding device for the belt vacuum filter for in-situ leaching of uranium according to claim 1, characterized in that: The guide roller brush (7) is evenly distributed with bristles made of PA material or nylon material.

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