DE102010013082A1 - Device for analyzing decomposition process of samples during inorganic raw material treatment, has sample receiving unit connected with balancing unit for obtaining weight of sample receiving unit - Google Patents

Abstract

The device (1) has a container (3) filled with a liquid, and a sample receiving unit with a sample to be examined immersed in the liquid in the container. The sample receiving unit is connected with a balancing unit (8) for obtaining weight of the sample receiving unit. An oscillation generator is arranged in such a manner that oscillation is transmitted to the liquid, and connected with the container and sample receiving unit, where the liquid is selected from caustic solutions, acids or oils. The sample receiving unit includes a receiving surface. An independent claim is also included for a method for analyzing a decomposition process of samples during an inorganic raw material treatment.

Description

The present invention relates to an apparatus and a method for investigating the decay process of samples in mineral processing of raw materials. In particular, the invention is used for the examination of soils, clay agglomerates, green pebbles from iron ores, filter dust pellets or other defined samples in mineral processing of raw materials.

In the extraction of sand and gravel adhering clay and clay are encouraged practically forcibly with it. During the subsequent treatment of mineral raw materials, adhering sand and loam must be washed out. For the management of the process and for the expense of the washing process, it plays a crucial role, how quickly and under which conditions adhering impurities such as sand, loam or clay detach from the mineral raw materials or dissolve.

Thus, the amount and the type of application of washing water and the operating mode of the cleaning machine depend significantly on the resolution of the deposited impurities.

For example, the amount of water added and the jet pressure of the applied water may be varied accordingly, or the vibration of a screening machine used for cleaning must be adjusted in amplitude or vibration frequency to effectively clean the minerals.

Furthermore, the residence time in a scrubber can depend on the properties of the material to be cleaned.

It is therefore the object of the present invention to provide an apparatus and a method with which the disintegration process of samples, in particular in mineral processing of raw materials, can be investigated.

This object is achieved by a device having the features of claim 1 and by a method having the features of claim 14. Preferred developments of the invention are the subject of the dependent claims. Further advantages, features and embodiments of the invention will become apparent from the embodiment.

The device according to the invention for examining the disintegration process of samples, in particular in the case of mineral raw material preparation, comprises at least one container which is filled with a fluid and in particular with a liquid. At least one sample receiving device is provided, which can be immersed in the fluid or liquid with a sample taken and to be examined. The sample receiving device is connected to a weighing device for detecting the weight or at least for detecting a measure of the weight of the sample receiving device.

The device according to the invention has many advantages. A considerable advantage of the device according to the invention is that the decomposition process of samples in mineral processing of raw materials can be investigated by quite simple means. By detecting the weight of the sample receiving device provided with the sample, the decomposition process can be controlled and logged.

It is possible that the weight is determined successively at several times. As a result, a course of weight or a weight change within a certain period of time can be determined.

Overall, it is possible with the device according to the invention to determine at least one or more parameters that are characteristic of the sample to be examined and their decay process.

In a preferred embodiment, at least one vibration generator is provided, which is provided for transmitting vibrations to the fluid or the liquid or the sample receiving device.

In preferred embodiments of the invention, the liquid may be a mixture of several liquids. It is also possible that the liquid contains dissolved additives or the like.

In preferred developments, the liquid is an aqueous solution and, in particular, can also be pure water. But it is also possible to use acids or alkalis.

It is also possible to use oils or other liquids if, for example, the sample to be investigated undergoes a chemical reaction with water.

In all embodiments, it is preferred that at least one vibration generator is connected to the container. In particular, a vibration generator or several vibration generators may be connected to the container bottom in order to introduce vibrations into the fluid or the liquid or into the sample receiving device from the container bottom.

Within the liquid, the applied vibrations propagate and thus act on the sample located at the sample receiving device and located completely below the liquid level. Through the targeted use of vibration generators, the examination time can be significantly shortened, making the investigation more effective.

The time reduction depends on the frequency used and on the sample to be examined. In concrete examples, time reductions between 25 and 75 have occurred, but even greater time reductions are possible.

In preferred embodiments, at least one vibration generator is connected to the sample receiving device. Thereby, the applied vibration can be transmitted directly to the arranged on the sample receiving device sample. In order to exclude or reduce negative effects on the weight measurement, the vibration generator acting on the sample receiving device can be switched off at the measuring times.

Advantageously, the sample receiving device is adapted to deliver detached particles of the sample into the container.

In an advantageous embodiment, the sample receiving device comprises at least one porous receiving surface for receiving the sample. In particular, the sample receiving device may have a plurality of passage openings in the receiving surface for the sample. For example, the sample receiving device may be formed as a receiving basket. The receiving surface may be formed as a sieve, screen basket or the like and have elongated or round or square openings. The individual openings may be uniform or uneven. In this case, individual openings may have the same or different passage sizes.

In all embodiments, at least one control device and optionally at least one memory device may be provided and configured to detect the weight course of a sample over the time or measuring time.

By evaluating a course of weight over the measuring time, different parameters for the decay behavior of the sample to be examined can be determined, which serve to set the parameters of a corresponding washing machine or cleaning machine.

In preferred embodiments of all embodiments described above, at least one vibration generator generates at least ultrasonic vibrations. The frequency range can be different and, for example, between 10 and 40 kHz. In a concrete embodiment, a good result has been achieved with frequencies in the range of 25 kHz. At frequencies in this range, relatively large cavitation bubbles are formed compared to excitation frequencies that are larger or smaller.

In other embodiments, in addition to a continuous vibration excitation and an excitation of pressure surges or the like is possible, leading to corresponding vibration pulses.

In preferred embodiments and further developments, at least one outlet is provided at the bottom of the container, and the bottom of the container is in particular inclined to the outlet. The angle of inclination of the ground can be variable. In particular, the floor has such a tendency that a self-emptying of the container takes place.

Preferably, at least one liquid connection to the container or its holder is provided and at least one liquid inlet opens into the container.

When performing the measurements, in particular further parameters can be detected or specifically influenced. For example, the temperature of the liquid and / or the sample can be set and / or detected in a defined manner. Furthermore, the pH or the electrical conductivity of the liquid used can be determined and / or controlled.

The method according to the invention serves to investigate the decay process of samples, in particular in the processing of mineral raw materials, and is carried out with a container filled with fluid or with a liquid. A sample received at a sample receiving device is immersed in the fluid and the fluid and / or the sample receiving device is vibrated at least temporarily via at least one vibration generator. During the measuring process, at least one weight of the sample is detected with a weighing device.

A significant advantage of the method according to the invention is that parameters for the decay process of the sample to be examined can be determined by the detection of the weight.

Advantageously, a weight course of the sample over time is detected, for which purpose the weight of the sample receiving device with the sample arranged thereon is detected at periodic intervals or continuously. Since the sample receiving device with the sample held up during the measurement process is within the liquid or the fluid, only a correspondingly reduced weight is determined. Through the course of weight over time a wide variety of parameters can be derived, which lead to advantageous settings of a cleaning machine in the mineral processing of raw materials.

Further advantages and features of the present invention will become apparent from the embodiment, which will be explained below with reference to the accompanying figures.

In the figures show:

1 a schematic side view of a device according to the invention;

2 a schematic perspective view of the device according to 1 ;

3 a sectional and schematic view of the device according to 1 ; and

4 the time course of weight loss of two different samples.

With reference to the 1 - 4 A first embodiment of the present invention will be explained.

In 1 is a schematic side view of an inventive device 1 pictured over a rack 28 has at which the container 3 is arranged. The container 3 is in a receiving area of the frame 28 arranged and can be removed if necessary to the content z. B. pour or around the container 3 to clean.

In the bottom area of the container 3 is one with a shut-off valve 30 provided outlet 21 provided to empty the container after performing a measuring operation or after a certain number of measuring operations.

At the rear end of the device 1 or the decay meter are a handle 29 and fluid connection 24 intended. The fluid connection 24 is through the frame 28 through with one above the container 3 arranged liquid inlet 25 connected. The liquid inlet 25 is arranged so that the liquid flowing out of it into the container 3 arrives.

From the sample receiver 6 are in the picture according to 1 only the ropes 34 visible to the sample receiving device 6 on a weighing device 8th hold.

In 3 is a schematic and partially sectioned side view of the device 1 displayed.

In the upper part of the frame 28 is the weighing device 8th arranged, to the sample receiving device 6 over ropes 34 is appended.

The sample receiving device 6 has a reception basket 17 on which a sieve 15 is arranged. The sieve 15 serves as a reception area 14 for a sample to be examined 2 ,

The sieve basket 7 or as a sieve 15 trained receiving surface 14 has a large number of openings 16 ,

During operation and when examining a sample to be examined 2 the sample disintegrates and particles that break off 13 fall through the passages 16 of the sieve 15 through and collect on the under a tilt angle 23 inclined container bottom 12 , Because of the detached particles 13 no longer on the sample receiving device 6 Their weight is no longer due to the weighing device 8th captured, so when particles are detached 13 a weight reduction of the sample 2 is detected.

To accumulate particles 13 on the surface of the screen 15 to avoid are the passages 16 in the sieve 15 so dimensioned that there accumulating particles 13 essentially avoided, but fall through to the bottom.

When measuring, the sample receiving device dives 6 so far into the container 3 one that the sample 2 completely below the liquid level 5 inside the liquid 4 located.

In support of the decay of the sample 2 are in the illustrated embodiment, the container bottom 12 one or more vibration generators 11 provided the high-frequency vibrations 35 Apply to the bottom of the container and thus into the liquid 4 contribute.

In the exemplary embodiment, the oscillation frequency of the vibration generators is about 25 kHz. But are also possible larger or smaller vibration frequencies. In particular, changing vibration frequencies are possible. Possible are also different vibration generators 11 that produce different vibration frequencies.

The introduction of the vibrations causes the decay of the sample 2 considerably accelerated. In practical examples, an acceleration by a factor of two, three or more has been found. In some cases, the acceleration of the decay can be even greater or smaller.

The signals of the weighing device 8th be over the wires 32 to the controller 18 directed. There the signals are stored in a memory device 19 stored. At the same time, the vibration generators become 11 by the control device 18 controlled. For example, it is possible that during individual measurements of the weight the vibration generators 11 be turned off to avoid adulteration. The measurement results are displayed on a display 20 issued via a line 33 with the control device 18 is connected, but also via an interface to an evaluation, z. B. transferred a PC and evaluated there. It is also possible to buffer the data on a memory unit and to evaluate it later on a separate computer.

In 4 is the percentage weight course of two different samples 2 shown over the measuring time T.

Both weight profiles start here 10 and 36 at the normalized original value 100 which adjusts itself immediately after the sample 2 into the sample receiving device 6 inserted and thus together in the liquid 4 in the container 3 has been inserted.

At the curve with the weight course 36 the decay starts immediately. The weight decreases continuously during the measuring time T.

The second drawn weight curve 10 has a special feature on the other hand. The relative weight initially increases at the beginning of the measurement, goes through a maximum and then drops. That's because there are small hollow spaces and the like in the sample 2 first degas and deal with liquid 4 suck fully, whereby the relative weight increases because the buoyancy due to the gas previously contained in the cavities missing. Such a course is also possible if adhering light sample components with a specific density below that of the fluid used initially come off and thus reduce the buoyancy.

Weight values are continuous, at specific intervals or at fixed times 9 recorded and in the storage device 19 stored. By the control device 18 become the stored weight values 9 evaluated. On the display 20 Both the weight gradients 10 respectively. 36 as well as evaluated parameters are determined and output.

For example, slope values 26 be derived or durations 27 for predefined weight loss or the like.

Overall, the introduction of the vibration waves 35 through the vibration generators 11 significantly accelerates the decay process so that metrics and parameters can be derived quickly and effectively.

Overall, the invention provides an advantageous method and an advantageous device with which the decay process of samples in mineral processing of raw materials can be evaluated. The obtained parameters can be used positively to set optimal conditions for the treatment of mineral raw materials.

LIST OF REFERENCE NUMBERS

1

Device, decay meter

2

sample

3

container

4

liquid

5

liquid level

6

Sample receiving device

7

strainer

8th

weighing

9

weight value

10

weight history

11

vibration generator

12

container bottom

13

particle

14

receiving surface

15

scree

16

Through opening

17

receiving basket

18

control device

19

memory device

20

display

21

outlet

23

tilt angle

24

liquid port

25

liquid inlet

26

pitch

27

time

28

frame

29

Handle

30

shut-off valve

31

management

32

management

33

management

34

rope

35

vibration waves

36

weight history

Claims (14)

Contraption ( 1 ) for investigating the decay process of samples ( 2 ) in the mineral processing of raw materials comprising at least one container ( 3 ), which is filled with a liquid ( 4 ), wherein a sample receiving device ( 6 ) provided with a sample taken and to be examined ( 2 ) into the liquid ( 4 ) in the container ( 3 ) is immersible, characterized in that the sample receiving device ( 6 ) with a weighing device ( 8th ) for detecting the weight ( 9 ) of the sample receiving device ( 6 ) connected is. Contraption ( 1 ) according to claim 1, wherein at least one vibration generator ( 11 ) is provided, which for transmitting vibrations to the liquid ( 4 ) is provided. Contraption ( 1 ) according to claim 1 or 2, wherein at least one vibration generator ( 11 ) with the container ( 3 ) connected is. Contraption ( 1 ) according to one of the preceding claims, wherein at least one vibration generator ( 11 ) with the sample receiving device ( 6 ) connected is. Contraption ( 1 ) according to any one of the preceding claims, wherein the liquid ( 4 ) is a mixture of several liquids. Contraption ( 1 ) according to any one of the preceding claims, wherein the liquid ( 4 ) may comprise an alkali, acid or an oil. Contraption ( 1 ) according to one of the preceding claims, wherein the sample receiving device ( 6 ) is adapted to remove detached particles ( 13 ) of the sample ( 2 ) in the container ( 3 ). Contraption ( 1 ) according to one of the preceding claims, wherein the sample receiving device ( 6 ) at least one porous receiving surface ( 14 ) and in particular a plurality of passage openings ( 16 ) in the receiving area ( 14 ) for the sample ( 2 ) having. Contraption ( 1 ) according to one of the preceding claims, wherein at least one control device ( 18 ) and a memory device ( 19 ) are provided which are adapted to the weight course ( 10 ) of a sample ( 2 ) over time (T). Contraption ( 1 ) according to one of the preceding claims, wherein at least one vibration device ( 11 ) at least generates ultrasonic vibrations. Contraption ( 1 ) according to one of the preceding claims, wherein an outlet ( 21 ) on the ground ( 12 ) of the container is provided and wherein the bottom ( 12 ) of the container ( 3 ) to the outlet ( 21 ) is inclined. Contraption ( 1 ) according to one of the preceding claims, wherein a liquid connection ( 24 ) on the container ( 3 ) and wherein a liquid inlet ( 25 ) in the container ( 3 ) opens. Method for investigating the decay process of samples ( 2 ) in the mineral processing of raw materials in one with a fluid ( 4 ) filled containers ( 3 ), in which a sample receiving device ( 6 ) with a recorded sample ( 2 ) into the fluid ( 4 ) is immersed during the measuring process, a weight ( 9 ) of the sample ( 2 ) with a weighing device ( 8th ) is detected. The method of claim 13, wherein the fluid ( 4 ) and / or the sample receiving device ( 6 ) via at least one vibration generator ( 11 ) is vibrated at least temporarily, Method according to claim 13 or 14, wherein a weight course ( 10 ) of the sample ( 2 ) over time (T) and, in particular, parameters ( 26 . 27 ) for the sample to be examined ( 2 ) be derived.

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