Device for preparing coarse-grained cobalt hydroxide sample

Abstract

The utility model discloses a device for preparing a coarse-grain cobalt hydroxide sample, the device comprises a vibrating feeder, a grinding cabin and a material receiving barrel which are sequentially arranged from top to bottom, a rotary cutter head is rotatably connected in the grinding cabin, and a standard sieve is arranged along the circumferential direction of the inner wall of the cabin body of the grinding cabin by taking the rotary cutter head as a center. The sample preparation step comprises vibration screening, cutting and grinding, sieving and collecting and sample preparation and sealing, coarse-grain cobalt hydroxide is cut and crushed by adopting a turbo-type rotating tool bit rotating at a high speed, and it is ensured that the coarse-grain cobalt hydroxide is cut around the rotating tool bit as far as possible after being subjected to centrifugal force and negative pressure suction in the cutting process; cut coarse-grain cobalt hydroxide is automatically screened by a standard screen and then falls into a material receiving barrel, cutting and screening are carried out at the same time, the problems that traditional sample preparation is large in labor intensity and makes contact with a large amount of dust are solved, and the sample preparation efficiency and the sample preparation quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of metal sample sampling and sample preparation equipment, and particularly relates to a device for preparing coarse-grained cobalt hydroxide samples. BACKGROUND

[0002] Cobalt is an extremely important strategic metal and is widely used in the fields of battery manufacturing, aerospace, high-temperature alloy, and magnetic material. In recent years, with the rapid development of new energy industry and aerospace technology, the demand for cobalt raw materials in the cobalt smelting industry is also increasing, but China is severely short of cobalt resources, the cobalt ore grade is low, and most of the cobalt ore is associated with multi-metal ore, so a large amount of cobalt raw materials need to be purchased, and the cost is high.

[0003] Coarse-grained cobalt hydroxide is one of the raw materials for cobalt production. In order to ensure the fairness of the transaction, it is necessary to accurately detect and analyze it, and the representativeness of the sample preparation is a decisive factor for improving the accuracy of chemical analysis. At present, the preparation method of coarse cobalt hydroxide sample is mainly grinding, and as an important step of sample preparation, the grinding particle size and sample quality directly affect the accuracy of cobalt hydroxide sample analysis. The grinding operation process is to mix the sample thoroughly first, use the grid method to divide the sample by not less than 2kg, measure the moisture content and prepare the composition sample, and then grind the sample using a disc pulverizer after the sample is completely dried and reaches a constant weight. However, there are the following problems in the grinding process: (1) the feeding port of the disc pulverizer is small, and the feeding particle size is required to be ≤6mm, so the sample needs to be added in batches, and screening needs to be performed at the same time, if there is oversize material, continue to grind, until the sample passes through the 100 mesh standard sieve, the whole grinding process needs at least 25min, and it is time-consuming and labor-intensive, and the weight of the single sample bowl is about 5-10kg, and the labor intensity of the operator is large during the process of moving the sample bowl; (2) the sample residue after grinding is serious, and the loss rate is ≥8%, which greatly reduces the representativeness of the sample and reduces the fairness of the trade between the two parties; (3) high temperature is generated during the grinding process, which easily leads to high-temperature oxidation of the sample, so the grinding time is not more than 3min each time, and the bowl body itself is also heated after multiple grinding of the sample bowl, which further aggravates the high-temperature oxidation of the sample; (4) the grinding gap of the disc pulverizer is not easy to control, and the adjustment of the disc gap will directly affect the sample particle size, thereby affecting the sample preparation efficiency, and the sample preparation process and time simply rely on the working experience of the sample preparation personnel, the operation standard difference is large, and manual error is inevitable. UTILIZABLE NEW FEATURES

[0004] The utility model provides a device for preparing coarse-grained cobalt hydroxide sample, aims at solving the problems of time-consuming and labor-intensive, high loss rate, and high temperature generated during the grinding process of the existing sample preparation device, which easily leads to high-temperature oxidation of the sample, thereby affecting the representativeness of the sample.

[0005] To achieve the purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a device for preparing coarse particle cobalt hydroxide sample, including vibration feeder, grinding cabin and receiving barrel which are sequentially arranged from top to bottom, vibration feeder includes the feed hopper of the top of the body, and the discharge port of feed hopper bottom communicates with the feed port of grinding cabin through the slide plate, and grinding cabin includes the rotary cutter head of rotation connection in its cabin body, and the standard screen is arranged along the circumference of the inner wall of grinding cabin cabin body with rotary cutter head as center, the discharge port of grinding cabin bottom communicates with the feed port of receiving barrel top, and the powder frequency conversion conveyor is arranged in receiving barrel, the powder frequency conversion conveyor includes the air pressure motor and pressure converter, and the air pressure motor is connected with the input end of pressure converter, and the output end of pressure converter communicates with the pressure storage tank, negative pressure tank and cyclone collector in proper order.

[0007] Further, the low end of the slide plate is inclined to the feed port of the grinding cabin, and the inclination angle is 10-15°.

[0008] Further, the grinding cabin body of the grinding cabin is horizontally cylindrical.

[0009] Further, the feed port of the grinding cabin is a four-prism structure with a large upper part and a small lower part.

[0010] Further, a plurality of equidistantly arranged screen holes are arranged on the standard screen, and the inner circle of the screen holes is raised and has a sharp edge near the rotary cutter head.

[0011] Further, the standard screen is cylindrical, and the screen hole is 100 mesh.

[0012] Further, the rotary cutter head is a turbine type rotary cutter head with a rotation speed of 2800-3200 r / min.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The device uses a high-speed turbine type rotary cutter head to cut and crush coarse particle cobalt hydroxide, ensuring that the coarse particle cobalt hydroxide is cut around the rotary cutter head as much as possible after being subjected to centrifugal force and negative pressure suction during the cutting process, and the cut coarse particle cobalt hydroxide falls into the receiving barrel after being automatically screened by the standard screen, so that cutting and screening are performed simultaneously, solving the problems of high labor intensity and high dust contact in traditional sample preparation, improving sample preparation efficiency and sample preparation quality, saving time and effort without affecting sample properties, and the prepared sample is representative.

[0015] 2. The device for preparing coarse-grained cobalt hydroxide sample has the standard sieve with 100 meshes arranged on the bottom of the grinding cabin along the outer periphery of the rotary cutter head, so that the coarse-grained cobalt hydroxide after grinding can meet the particle size standard of the standard sample after one-time grinding, and the sample particle size is effectively controlled. Moreover, a plurality of screen holes are arranged equidistantly on the standard sieve, the inner circle of the screen hole is close to the side of the rotary cutter head and is protruded and sharp-edged, and the coarse-grained cobalt hydroxide with large particle size can be further broken when passing through the standard sieve, and the cutting efficiency of the coarse-grained cobalt hydroxide is further improved.

[0016] 3. The device has a continuous feeding mode, and the rotary cutter head can bring the coarse-grained cobalt hydroxide falling through the feeding port of the grinding cabin into the grinding cabin in the process of high-speed rotation, so that the problem of limited sample preparation amount is solved, and the sample preparation efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structure schematic view of the coarse-grained cobalt hydroxide sample preparation device of the utility model.

[0018] Figure 2 It is a structure schematic view of the powder frequency conversion conveyor of the utility model.

[0019] Figure 3 It is a structure schematic view of the standard sieve of the utility model.

[0020] In the figure: 1-vibration feeder; 2-grinding cabin; 3-receiving barrel; 4-feeding hopper; 5-rolling plate; 6-rotary cutter head; 7-standard sieve; 8-negative pressure tank; 9-pressure storage tank; 10-pressure converter; 11-air pressure motor; 12-cyclone collector. DETAILED DESCRIPTION

[0021] The utility model will be further described below in combination with the drawings:

[0022] The utility model provides a device for preparing coarse particle cobalt hydroxide sample, which comprises a vibrating feeder 1, a grinding cabin 2 and a collecting barrel 3 arranged in sequence from top to bottom. The vibrating feeder 1 comprises a feeding hopper 4 arranged at the top of the machine body, and the bottom of the feeding hopper 4 is communicated with the feeding port of the grinding cabin 2 through a chute 5, wherein the low end of the chute 7 is arranged at an angle of 15° to the feeding port of the grinding cabin 2. The grinding cabin 2 comprises a rotary cutter head 6 rotatably connected in the cabin body, and the rotary cutter head 6 is a turbine type rotary cutter head with a rotating speed of 3000 r / min. A standard screen 7 is arranged along the inner wall of the cabin body of the grinding cabin 2 and centered on the rotary cutter head 6. The grinding cabin body and the standard screen 4 are both horizontally cylindrical, and the feeding port of the grinding cabin 2 is a quadrangular prism structure with a large upper part and a small lower part. The standard screen 7 is provided with a plurality of 100-mesh screen holes arranged at equal intervals, and the inner circle of the screen holes is protruded and sharp-edged on the side close to the rotary cutter head 6. The bottom discharge port of the grinding cabin 2 is communicated with the top feeding port of the collecting barrel 3, and the collecting barrel 3 is provided with a powder frequency conversion conveyor.

[0023] When the preparation device is used to prepare the coarse particle cobalt hydroxide sample, the cabin body of the grinding cabin 2 is first checked for cleanliness, then the rotary cutter head 6 is installed in the cabin body of the grinding cabin 2, then the cabin door (not shown in the figure) of the grinding cabin 2 is closed, the power switch of the device is turned on, and after idling for 20 s, the sample preparation is started. The sample preparation steps are as follows:

[0024] S1: vibrating screening; the coarse particle cobalt hydroxide raw material is first uniformly mixed and divided, and then the divided coarse particle cobalt hydroxide raw material is uniformly poured from the feeding hopper 4 into the vibrating feeder 1 for vibrating screening and feeding;

[0025] S2: cutting and grinding; after the coarse particle cobalt hydroxide after the vibrating screening and feeding in step S1 flows into the grinding cabin 2, a high-pressure air gun is used to blow towards the feeding port of the grinding cabin 2 for 10 s; then the rotary cutter head 6 in the grinding cabin 2 is started to cut and crush the coarse particle cobalt hydroxide;

[0026] S3: screening and collection; the coarse particle cobalt hydroxide after the grinding in step S2 falls into the standard screen 7 in the cabin body of the grinding cabin 2 for screening. The screened sample successively passes through the pressure storage tank 9, the negative pressure tank 8 and the cyclone collector 12 under the action of the air pressure motor 11 and falls into the collecting barrel 3. During the sample collection process, the air pressure of the air pressure motor 11 is controlled by the pressure converter 10 to perform powder frequency conversion conveying. After the screening is completed, the rotary cutter head 6 in the grinding cabin 2 is turned off, the standard screen 7 is removed, and the coarse particle cobalt hydroxide remaining on the inner wall of the grinding cabin 2 is swept into the collecting barrel 3 by a brush;

[0027] S4: sample preparation and storage; the coarse cobalt hydroxide in the receiving barrel 3 was poured into a sample mixing bag, weighed to obtain 1142 g of sample, the sample loss was ignored, and the sample was mixed and divided into 4 parts by quartering method, to obtain a coarse cobalt hydroxide sample of 285.5 g in each part, and then the sample was respectively stored in an aluminum foil bag.

Claims

1. An apparatus for preparing a coarse-grained cobalt hydroxide sample, characterized by: The application relates to a powder grinding machine, which comprises, from top to bottom, a vibrating feeder (1), a grinding cabin (2) and a collecting barrel (3); the vibrating feeder (1) comprises a feeding hopper (4) arranged at the top of a machine body, a discharge port at the bottom of the feeding hopper (4) is communicated with a feeding port of the grinding cabin (2) through a chute (5); the grinding cabin (2) comprises a rotary cutter head (6) rotationally connected in the cabin body, a standard screen (7) is arranged along the inner wall of the cabin body of the grinding cabin (2) and takes the rotary cutter head (6) as the center; a discharge port at the bottom of the grinding cabin (2) is communicated with a feeding port at the top of the collecting barrel (3), a powder frequency conversion conveyor is arranged in the collecting barrel (3); the powder frequency conversion conveyor comprises a wind pressure motor (11) and a pressure converter (10), the wind pressure motor (11) is connected with the input end of the pressure converter (10), and the output end of the pressure converter (10) is sequentially communicated with a pressure storage tank (9), a negative pressure tank (8) and a cyclone collector (12).

2. An apparatus for preparing a coarse-grained cobalt hydroxide sample as claimed in claim 1, characterized in that: The low end of the chute (5) is inclined to the feeding port of the grinding cabin (2), and the inclination angle is 10-15 degrees.

3. An apparatus for producing a coarse-grained cobalt hydroxide sample as claimed in claim 2, characterized in that: The grinding cabin body of the grinding cabin (2) is horizontally cylindrical.

4. An apparatus for producing a coarse-grained cobalt hydroxide sample as claimed in claim 3, characterized in that: The feeding port of the grinding cabin (2) is a four-prism table structure with large upper part and small lower part.

5. An apparatus for producing a coarse-grained cobalt hydroxide sample as claimed in claim 4, characterized in that: A plurality of equidistantly arranged screen holes are arranged on the standard screen (7), the inner ring of the screen holes is protruded and the edge is sharp near one side of the rotary cutter head (6).

6. An apparatus for preparing a coarse-grained cobalt hydroxide sample as claimed in claim 5, characterized in that: The standard screen (7) is cylindrical, and the screen hole is 100 mesh.

7. An apparatus for producing a coarse-grained cobalt hydroxide sample as claimed in claim 6, characterized in that: The rotary cutter head (6) is a turbine type rotary cutter head with a rotating speed of 2800-3200 r / min.

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