Density measuring device for high-water-content fine-fraction coal or coal slime

Abstract

The utility model provides a density measuring device for high-water-content fine-fraction coal or coal slime, and belongs to the technical field of comprehensive coal treatment. The density measuring device comprises: a liquid feeding device, the upper end of which is provided with a slender bottleneck; the solid charging device is a bowl-shaped container, and the upper end of the bowl-shaped container is detachably connected with the lower end of the liquid feeding device in a threaded fit mode. The density measuring device further comprises a bolt fixing part which is fixed on the inner surface of the bottom of the solid charging device; and the at least one calibration sample block can be tightly matched and connected with the bolt fixing component. The density measurement device and the density measurement method have the advantages of simplicity in operation, no need of additional processing treatment on raw materials, low environmental requirements, wide application range, high measurement precision and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of comprehensive treatment of high-water-content fine-grained coal or coal slime, in particular to a density measuring device for high-water-content fine-grained coal or coal slime. Background Art

[0002] Due to the large-scale application of mechanized coal mining, a large amount of fine-grained coal is produced. Therefore, the treatment and utilization of high-moisture fine-grained coal and coal slime produced during the coal mining process has become a key constraint to the sustainable development of coal enterprises.

[0003] High-moisture fine-grained coal and coal slime have different particle shapes and compositions, and their physical and chemical properties also differ significantly. Gravity separation, flotation, and drying are commonly used to upgrade and separate high-moisture fine-grained coal and coal slime. During the upgrading and separation process, whether gravity separation or flotation, the efficiency of the upgrading process is affected by particle density.

[0004] GB / 217-2008, "Determination of the True Density of Coal," and GB / T 9966.3-2020, "Test Methods for Natural Stone - Part 3: Tests for Water Absorption, Bulk Density, Density, and True Porosity," provide methods for measuring the density of coal and natural stone, respectively. Both methods calculate the density of the test sample based on the mass of water displaced by the sample. However, there are currently no specific standards for measuring the density of high-moisture fine-grained coal and coal slime. According to the true density measurement method for coal, using a pycnometer to measure the density of high-moisture fine-grained coal and coal slime samples can result in sample loss due to the small mouth of the pycnometer. Furthermore, when using water as the measuring solvent, the dried fine-grained coal and coal slime cannot be fully wetted within a short period of time. Some lighter particles float to the surface of the measuring liquid, forming a blockage at the mouth of the pycnometer, making it difficult to add the solution and making accurate volume determination impossible. This affects the precise measurement of volume and mass, resulting in significant errors in the density data. Furthermore, when using a pycnometer and water as a solution, the density of water changes with temperature, resulting in low density measurement accuracy and large errors. This problem is almost impossible to eliminate in practice. More importantly, when drying and other methods are used to process high-moisture fine-grained coal and coal slime samples, the wet density of the fine-grained coal or coal slime needs to be clarified during the filter press dehydration process. However, there is currently no accurate method for measuring the wet density of these raw materials. The above-mentioned standards all measure the dry density of the material.

[0005] Therefore, accurate density measurement requires solving two problems. The first is how to accurately place high-moisture fine-grained coal or coal slime into the measuring device to reduce losses, and how to more accurately control the amount of solution added when adding the measuring solution and promptly obtain the density of the measuring solution under these conditions. The second is how to accurately measure the wet density of high-moisture fine-grained coal or coal slime in its water content state, and how to calibrate newly purchased or long-term instruments.

[0006] In view of this, the utility model provides a novel density measuring device which can directly measure the density of high-water-content fine-grained coal or coal slime. Utility Model Content

[0007] The purpose of the present utility model is to at least partially solve the above-mentioned technical problems and to provide a new density measuring device that can directly measure the density of high-water-content fine-grained coal or coal slime. The density measuring device has the advantages of simple operation, no need for additional processing of raw materials, low environmental requirements, wide range of applications, and high measurement accuracy.

[0008] In one aspect of the present invention, a density measuring device for high-moisture fine-grained coal or coal slime is provided, the density measuring device comprising:

[0009] A liquid feeding device, wherein the upper end of the liquid feeding device is provided with a slender bottleneck;

[0010] A solid charging device, wherein the solid charging device is a bowl-shaped container,

[0011] The upper end of the bowl-shaped container and the lower end of the liquid feeding device are detachably connected through threaded engagement.

[0012] In some embodiments, the density measuring device further comprises:

[0013] a bolt fixing member fixed to an inner surface of a bottom portion of the solid charging device;

[0014] At least one calibration sample block, at least one of the calibration sample blocks can be tightly matched with the bolt fixing component.

[0015] In some embodiments, the elongated bottle neck is marked with precision scale lines.

[0016] In some embodiments, the bolt fixing component is fixed to the bottom of the solid charging device by fixing a bolt joint, bonding or melting.

[0017] In some embodiments, the diameter of the bolt fixing member is no greater than 1 / 8 of the bottom diameter of the solid charging device and no greater than 1 / 3 of the height of the solid charging device.

[0018] In some embodiments, the bolt fixing components are installed in the middle or on both sides of the interior of the bowl-shaped container.

[0019] In some embodiments, at least one of the calibration samples has a known density and volume, wherein the known density is in the range of 1.1 to 2.5 g cm 3The bottom area of ​​the known volume does not exceed 1 / 3 of the bottom diameter of the solid charging device, and the calibration sample block is a columnar or cubic block with a height of 1 / 2 of the height of the solid charging device.

[0020] In some embodiments, the liquid feeding device and the solid charging device are fixed by an externally provided fixing assembly, wherein the fixing assembly includes a screw or a screw rod and a nut.

[0021] In some embodiments, the scale line of the liquid feeding device has a scale accuracy of 0.1 mL, and the outer diameter of the elongated bottleneck is 0.5-1 cm;

[0022] The fixed volume of the density measuring device is 0.5L-5L.

[0023] In some embodiments, the measured mass of dry material in the high-moisture fine-grained coal or coal slime is in the range of 10 g to 100 g;

[0024] The test samples are samples of mine water that have undergone quality improvement treatment in a filter press workshop.

[0025] During use, the density measuring device can be opened from the middle, and high-water-content fine-grained coal or coal slime can be weighed and placed in the density measuring device, while the measuring solution enters from the upper part and performs volume calibration; the screws or screws and nuts of the fixing components on both sides of the density measuring device can further fix the upper and lower parts of the device to fix the volume of the entire device; the scale on the density measuring device is precise, which is convenient for measuring and reading the volume of the measuring liquid, and can avoid errors in liquid calibration. At the same time, the density measuring device can be calibrated using a calibration sample with known density and volume, and the calibrated calculation equation can be used to obtain corrected and more accurate measurement data.

[0026] The density measuring device for high-moisture fine-grained coal or coal slime according to the embodiment of the present invention has at least one or part of the following advantages:

[0027] The embodiments of the present invention provide a density measuring device for high-moisture fine-grained coal or coal slime, which can accurately measure the density of high-moisture fine-grained coal or coal slime at a relatively low cost and under simple experimental conditions, has low requirements for solution quality, and has little influence of the external environment on the data results. The density measuring device is detachable, and solid materials can be directly loaded into the density measuring device. The precise scale of the upper bottleneck ensures the accuracy of the calibration of the measuring solution, which can avoid material loss and measurement errors of the pycnometer method. The density measuring device has a built-in calibration component, which can be calibrated in time. The operation is simple, the test cycle is short, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] These and / or other aspects and advantages of the present invention will become apparent and readily understood from the following description of preferred embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 This is a schematic structural diagram of a density measuring device for high-water-content fine-grained coal or coal slime according to one embodiment of the present utility model;

[0030] Figure 2 It is a flow chart of the steps of a density measurement method when measuring the wet density of high-water content fine-grained coal or coal slime;

[0031] Figure 3 The present invention is a flow chart of the steps of a density measurement method when measuring the dry density of high-water content fine-grained coal or coal slime. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall concept of the present invention and should not be construed as limiting the present invention.

[0033] In an embodiment of the present invention, a density measuring device for high-water-content fine-grained coal or coal slime and a density measuring method using the density measuring device are provided.

[0034] See also Figure 1 , shows a schematic three-dimensional structure of a density measuring device 100 for high-moisture fine-grained coal or coal slime. Density measuring device 100 comprises a liquid feed device 10 and a solid loading device 20. Of course, for density calibration purposes, it may also include bolt fixing components 30 and a calibration sample block 40. The various components of the density measuring device are made of any one of PMMA, PP, PVC, PE, or any combination thereof.

[0035] The upper end of the liquid feeding device 10 is provided with an elongated bottle neck 11 marked with precision scale 12. The solid loading device 20 is a bowl-shaped container with threads. The upper end of the bowl-shaped container and the lower end of the liquid feeding device 10 are detachably connected via threads. Preferably, the threads are configured to have high precision.

[0036] The liquid feeding device 10 and the solid loading device 20 are connected by threads provided on each and fixed by a fixing assembly 50, wherein the fixing assembly 50 includes a screw or a threaded rod 51 and a nut 52 to prevent leakage of the solution of the density measuring device 100. When disassembly is required, the two can be separated or assembled together by threads and / or screws or bolts.

[0037] In some embodiments, the scale line of the liquid feeding device 10 has a scale accuracy of 0.1 mL, and the outer diameter of the elongated bottleneck 11 is 0.5-1 cm. When the two are assembled together, the overall shape of the density measuring device 100 is spherical, and its fixed volume is generally set to 0.5L-5L.

[0038] During density calibration, the bolt fixing member 30 is fixed to the inner surface of the bottom of the solid charging device 20. The diameter of the bolt fixing member 30 is no greater than 1 / 8 of the bottom diameter of the solid charging device 20 and no greater than 1 / 3 of the height of the solid charging device 20. The bolt fixing member 30 can be installed at any suitable location inside the bowl-shaped container, such as in the middle or on both sides.

[0039] In some embodiments, at least one of the calibration blocks 40 can be tightly coupled to the bolt fixing member 30. The bolt fixing member 30 is fixed to the bottom of the solid charging device 20 by a bolt fixing joint, bonding, or melting. At least one of the calibration blocks 40 has a known density and volume, and the known density is in the range of 1.1 to 2.5 g / cm 3 The bottom area of ​​the known volume does not exceed 1 / 3 of the bottom diameter of the solid charging device 20, and the calibration sample block 40 is a columnar or cubic block with a height of 1 / 2 of the height of the solid charging device 20.

[0040] In some embodiments, the measured mass of the dry material in the high-moisture fine-grained coal or coal slime is in the range of 10 g to 100 g. For samples containing too little solid material, it is recommended to perform measurement after concentration.

[0041] In some embodiments, the measurement solution may be tap water, distilled water, filtered wastewater with stable composition, etc. The density of the measurement solution may be measured under simple experimental conditions.

[0042] In some embodiments, the test sample is a sample from a mine water filter press that has undergone upgrading. The test sample can come from a mine water filter press, a fine-grained coal or coal slime upgrading process, or other upgraded samples. The wet and dry densities of high-moisture fine-grained coal or coal slime can be measured.

[0043] It should be noted that by building a bolt fixing component 30 and a calibration sample block 40 into the density measuring device 100, adding a calibration sample block 40 of known density and known volume and a calibration link, more accurate measurement data can be obtained to the greatest extent, thereby more effectively guiding downstream production.

[0044] The density of high-water-content fine-grained coal or coal slime can be accurately measured at a relatively low cost and under simple experimental conditions. The solution quality requirements are relatively low, and the external environment has little influence on the data results. The device is detachable, and solid materials can be directly loaded into the density measuring device. The precise scale of the slender bottleneck 11 on the upper part ensures the accuracy of the calibration of the measuring solution. The operation is simple, the test cycle is short, and the practicability is strong.

[0045] See also Figure 2 , shows a measurement method using a density measuring device 100 for high-moisture fine-grained coal or coal slime according to another embodiment of the present invention. The density measuring device 100 is used to measure the wet density or dry density of high-moisture fine-grained coal or coal slime.

[0046] When measuring the wet density of high-moisture fine-grained coal or coal slime, the measuring steps of the measuring method are as follows:

[0047] S1. Weigh the density measuring device 100 to have a mass m0 and a volume V. Inject the measuring solution into the installed density measuring device until it reaches the constant volume mark on the precision scale line 12. Record the mass of the density measuring device at this point as m1.

[0048] S2. Calculate the density of the measurement solution according to the formula:

[0049]

[0050] S3. If the sample to be measured is high-moisture fine-grained coal or coal slime, directly add the high-moisture fine-grained coal or coal slime that has been pre-filtered to remove any water to the solid charging device 20. Weigh the mass m (accurate to 0.002 g) of the added high-moisture fine-grained coal or coal slime using differential subtraction. After connecting the liquid feeding device 10 and the solid charging device 20, add the measuring solution to the constant volume mark through the inlet of the elongated bottleneck 11 at the top of the liquid feeding device 10. Wipe off any residue on the outside of the liquid feeding device 10, weigh the density measuring device 100 at this point, and record the mass as M.

[0051] S4. Calculate the density of high-water-content fine-grained coal or coal slime according to the formula:

[0052]

[0053] S5. The repeatability limit of multiple experimental values ​​of the same sample is ±0.02, which can be used to obtain the measurement results of the density of high-water-content fine-grained coal or coal slime.

[0054] In another embodiment, when the measuring method is used to measure the dry density of high-moisture fine-grained coal or coal slime, the measuring steps of the measuring method are as follows:

[0055] S1. Weigh the mass of the density measuring device 100 as m0 and the volume as V, inject the measuring solution into the installed density measuring device 100 until it reaches the constant volume scale line on the precision scale line 12, and record the mass of the density measuring device 100 at this time as m1;

[0056] S2. Calculate the density of the measurement solution according to the formula:

[0057]

[0058] S3. The measurement sample is high-moisture fine-grained coal or coal slime. The high-moisture fine-grained coal or coal slime is directly added to the solid charging device 20, and the mass m of the added high-moisture fine-grained coal or coal slime is weighed by differential subtraction. a (accurate to 0.002g), then connect the liquid feeding device 10 and the solid charging device 20, add the measuring solution to the constant volume scale line from the inlet of the elongated bottleneck 11 at the top of the liquid feeding device 10, wipe off the residue on the outside of the liquid feeding device 10, weigh the density measuring device 100 at this time, and record the mass as M;

[0059] S4. Pour the coal slurry in the density measuring device 100 into the Buchner funnel with filter paper. The mass of the filter paper is weighed in advance. b Filter the coal slime water. After ensuring that no water drops out of the filter paper and the filtered sample, take out the filter paper and the filtered high-water-content fine-grained coal or coal slime raw material and dry them together. Weigh the mass of the dried filter paper and coal or coal slime raw material and record it as m c , thus obtaining the mass of the dried high-moisture fine-grained coal or coal slime raw material m=m c -m b ;

[0060] S5. Calculate the density of high-water-content fine-grained coal or coal slime according to the formula:

[0061]

[0062] S6. The repeatability limit of multiple experimental values ​​of the same sample is ±0.02, which can be used to obtain the measurement results of the density of high-water-content fine-grained coal or coal slime.

[0063] In some embodiments, when the density measuring device 100 is used for the first time or is used again after being stored for a long time, the density measuring device 100 needs to be calibrated using a standard sample of a calibration sample block 40 with a known density and a known volume.

[0064] In some embodiments, after step S2, the calibration sample block 40 is tightly connected to the bottom of the solid charging device 20 via the bolt fixing component 30, and then the measuring solution is added and weighed, and the measured density of the standard sample is calculated according to Formula 2 to obtain the measured density.

[0065] During the density calibration process, two calibration blocks 40 are used, and the densities of the two calibration blocks 40 are greater than 1.1 g cm 3 and less than 2.5 g cm 3 , and greater than 1.5gcm 3 and less than 2.5 g cm 3 ;

[0066] The density of the two calibration blocks 40 is measured and compared with the standard density, and the calibrated density formula is obtained:

[0067]

[0068] Wherein, ρ1 and ρ2 are the standard densities of the two calibration blocks 40, and ρ1' and ρ2' are the standard measurement densities of the two calibration blocks 40;

[0069] If the error between the density measurement result after calibration of the high-moisture fine-grained coal or coal slime to be measured and the density measurement result calculated by Formula 2 is less than ±0.02, the density measurement result obtained by Formula 2 can continue to be used; if the error is greater than ±0.02, calibration is performed using the density calibration process.

[0070] The density and volume data of the calibration sample 40 are regularly sent to a qualified testing agency for measurement and calibration.

[0071] In some embodiments, the components of the density measuring device 100 are made of any one of PMMA, PP, PVC, and PE, or any combination thereof.

[0072] The density measuring device 100 includes:

[0073] A liquid feeding device 10, wherein an elongated bottleneck 11 is provided on the upper portion of the liquid feeding device 10;

[0074] A solid charging device 20, wherein the solid charging device 20 is a bowl-shaped container;

[0075] a bolt fixing member 30 , wherein the bolt fixing member 30 is fixed to the inner surface of the bottom of the solid charging device 20 ;

[0076] At least one calibration sample block 40 , wherein at least one calibration sample block 40 can be tightly matched with the bolt fixing component 30 .

[0077] In some embodiments, the elongated neck 11 is marked with precision scale lines 12;

[0078] The upper end of the bowl-shaped container is provided with a thread around its periphery;

[0079] The bolt fixing component 30 is fixed to the bottom of the solid charging device 20 by bonding or melting, wherein the diameter of the bolt fixing component 30 is not greater than 1 / 8 of the bottom diameter of the solid charging device 20 and not greater than 1 / 3 of the height of the solid charging device 20. The bolt fixing component 30 is installed on both sides of the inside of the bowl-shaped container.

[0080] In some embodiments, at least one of the calibration samples 40 has a known density and volume, wherein the known density ranges from 1.1 to 2.5 g cm 3 The bottom area of ​​the known volume does not exceed 1 / 3 of the bottom diameter of the solid charging device 20, and the calibration sample block 40 is a columnar or cubic block with a height of 1 / 2 of the height of the solid charging device 20;

[0081] The liquid feeding device 10 and the solid charging device 20 are connected by threads and fixed by screws 50 .

[0082] In one embodiment, the scale line of the liquid feeding device 10 has a scale accuracy of 0.1 mL, and the outer diameter of the elongated bottleneck is 0.5-1 cm;

[0083] The fixed volume of the density measuring device 100 is 0.5L-5L;

[0084] The measured mass of the dry material in the high-moisture fine-grained coal or coal slime is in the range of 10g-100g;

[0085] The test samples are samples of mine water that have undergone quality improvement treatment in a filter press workshop.

[0086] Example 1

[0087] Example 1 of the present invention provides a measurement method using a density measuring device 100 for high-moisture fine-grained coal or coal slime. The measurement sample is a sample obtained by particle size screening and drying of Yulin high-moisture fine-grained coal. The measurement steps are as follows:

[0088] S1, the mass of the density measuring device 100 is m0 and the volume is V. Deionized water is injected into the installed density measuring device 100 to the constant volume scale line on the slender bottleneck 11 of the density measuring device 100, and the mass is recorded as m1.

[0089] S2. Calculate the real-time density of deionized water according to the formula:

[0090]

[0091] S3. This experiment uses dry high-moisture fine-grained coal and weighs the sample mass m (accurate to 0.002g).

[0092] S4. After the density measuring device 100 is dried, place a sample of the high-moisture fine-grained coal to be measured into the solid charging device 20, connect it to the liquid feeding device 10, tighten it with threads, and then fix it with screws 51 and nuts 52. Add deionized water from the top of the liquid feeding device 10 to the constant volume scale line, quickly wipe the outer wall of the density measuring device 100 dry, and weigh the mass M of the density measuring device 100 and the deionized water.

[0093] S5. Calculate the density of dry high-moisture fine-grained coal according to the formula:

[0094]

[0095] S6. During this measurement, a density calibration step was introduced, using a standard density of 1.25 g / cm 3 Standard sample and 1.65g / cm 3 Density calibration is performed on the standard sample, and the density measurement result of the high-moisture fine-grained coal is obtained after calibration.

[0096] Samples of S7 and Yulin high-moisture fine-grade coal, obtained by screening, had density values ​​ranging from 1.3 to 1.5. Density measurements are shown in Table 1. Density is inversely proportional to loss on ignition data, indicating that this method yields accurate density data. This data suggests that particle size classification can be an important step in the quality classification of high-moisture fine-grade coal and coal slime.

[0097] Example 2

[0098] Example 2 of the present invention provides a measurement method using a density measuring device 100 for high-moisture fine-grained coal or coal slime. The measurement sample is a sample obtained after wet screening of Gaojiabao high-moisture fine-grained coal slime, and its wet basis density needs to be measured. The measurement steps are as follows:

[0099] S1. Weigh the density measuring device 100 to have a mass of m0 and a volume of V. Pour ordinary tap water into the installed density measuring device 100 to the fixed volume mark (with an error of less than ±0.1 mL), and record the mass m1.

[0100] S2. Calculate the real-time density of water according to the formula:

[0101]

[0102] S3. This experiment uses a wet sample and weighs the sample mass m (accurate to 0.002g).

[0103] S4. After the density measuring device 100 is dry, place the high-water-content fine-grained coal slime sample to be measured into the solid loading device 20. Connect it to the liquid feeding device 10, tighten it with threads, and then secure it with screws 51 and nuts 52. Add water from the top to the constant volume mark. Quickly wipe the outer wall of the density measuring device 100 dry, and weigh the mass M of the entire device and the water.

[0104] S5. Calculate the density of high-moisture fine-grained coal and coal slime according to the formula:

[0105]

[0106] S6. During this measurement, a density calibration step was introduced, using a standard density of 1.25 g / cm 3 Standard sample and 1.65g / cm 3 Density calibration was performed on the standard sample, and the density measurement results of high-water-content fine-grained coal slime were obtained after calibration.

[0107] S7. The density measurement values ​​and loss on ignition of each particle size fraction are shown in Table 2.

[0108] Example 3

[0109] Example 3 of the present invention provides a measurement method using a density measuring device 100 for high-moisture fine-grained coal or coal slime. The measurement sample is a high-moisture fine-grained coal sample obtained from Shuozhou, Xinjiang, Jincheng, etc., and its dry basis density needs to be measured. The measurement steps are as follows:

[0110] S1. Weigh the density measuring device 100 with a mass of m0 and a volume of V. Pour anhydrous ethanol into the installed density measuring device 100 to the constant volume mark (with an error of less than ±0.1 mL), and record the mass m1.

[0111] S2. Calculate the real-time density of water according to the formula:

[0112]

[0113] S3. Weigh the mass m of the uniformly sampled wet slag, and take samples of the same mass to measure the moisture content w and mass m. d ,at this time

[0114]

[0115] S4. After density measuring device 100 is dry, place the high-moisture fine-grained coal and coal slime sample to be measured into solid loading device 20. Connect solid loading device 20 to liquid feeding device 10, tighten with threads, and then secure with screws 51 and nuts 52. Add anhydrous ethanol to the constant volume mark from the top of the slender neck 11 of liquid feeding device 10. Quickly wipe the outer wall of density measuring device 100 dry, and weigh the mass M of the entire device and the water.

[0116] S5. Calculate the density of high-moisture fine-grained coal and coal slime according to the formula:

[0117]

[0118] S6. During this measurement, a density calibration step was introduced, using a standard density of 1.25 g / cm 3 Standard sample and 1.65g / cm 3 Density calibration is performed on standard samples, and the density measurement results of high-moisture fine-grained coal and coal slime are obtained after calibration.

[0119] S7. The measurement results show that the dry density of the Shuozhou coal sample is 1.461g / cm 3 The dry density of Xinjiang coal sample is 1.405g / cm 3 The dry density of Jincheng coal sample is 1.493g / cm 3 From the density measurement data, it can be seen that there is a significant gap in the density data of coal samples from different regions.

[0120] Table 1 Density measurements of Example 1

[0121]

[0122] Table 2 Density measurements of Example 2

[0123]

[0124] During use, the density measuring device can be opened from the middle, and high-water-content fine-grained coal or coal slime can be weighed and placed in the density measuring device, while the measuring solution enters from the upper part and performs volume calibration; the screws or screws and nuts of the fixing components on both sides of the density measuring device can further fix the upper and lower parts of the device to fix the volume of the entire device; the scale on the density measuring device is precise, which is convenient for measuring and reading the volume of the measuring liquid, and can avoid errors in liquid calibration. At the same time, the density measuring device can be calibrated using a calibration sample with known density and volume, and the calibrated calculation equation can be used to obtain corrected and more accurate measurement data.

[0125] The density measuring device for high-water-content fine-grained coal or coal slime and the density measuring method using the same according to the embodiment of the present invention have at least one or at least one part of the following advantages:

[0126] The embodiments of the present utility model provide a density measuring device for high-water-content fine-grained coal or coal slime and a density measuring method using the same, which can accurately measure the density of high-water-content fine-grained coal or coal slime at a relatively low cost and under simple experimental conditions, has low requirements on solution quality, and has little influence of the external environment on the data results. The density measuring device is detachable, and solid materials can be directly loaded into the density measuring device. The precise scale of the upper bottleneck ensures the accuracy of the calibration of the measuring solution, which can avoid material loss and measurement errors of the pycnometer method. The density measuring device has a built-in calibration component, which can be calibrated in time. The operation is simple, the test cycle is short, and the practicality is strong.

[0127] Although some embodiments of the general concept of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the general concept of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A density measuring device for high-water-content fine-grained coal or coal slime, characterized in that: The density measuring device comprises: A liquid feeding device, wherein the upper end of the liquid feeding device is provided with a slender bottleneck; A solid charging device, wherein the solid charging device is a bowl-shaped container, The upper end of the bowl-shaped container and the lower end of the liquid feeding device are detachably connected through threaded engagement.

2. The density measuring device for high-water-content fine-grained coal or coal slime according to claim 1, characterized in that: The density measuring device further comprises: a bolt fixing member fixed to an inner surface of a bottom portion of the solid charging device; At least one calibration sample block, at least one of the calibration sample blocks can be tightly matched with the bolt fixing component.

3. The density measuring device for high-water content fine-grained coal or coal slime according to claim 2, characterized in that: The elongated bottle neck is marked with precise scale lines.

4. The density measuring device for high-water-content fine-grained coal or coal slime according to claim 3, characterized in that: The bolt fixing component is fixed to the bottom of the solid charging device by fixing the bolt joint, bonding or melting.

5. The density measuring device for high-water content fine-grained coal or coal slime according to claim 4, characterized in that: The diameter of the bolt fixing member is no greater than 1 / 8 of the bottom diameter of the solid charging device and no greater than 1 / 3 of the height of the solid charging device.

6. The density measuring device for high-water content fine-grained coal or coal slime according to claim 5, characterized in that: The bolt fixing components are installed in the middle or on both sides of the bowl-shaped container.

7. The density measuring device for high-water content fine-grained coal or coal slime according to any one of claims 2 to 6, characterized in that: At least one of the calibration samples has a known density and volume, wherein the known density ranges from 1.1 to 2.5 g cm 3 The bottom area of ​​the known volume does not exceed 1 / 3 of the bottom diameter of the solid charging device, and the calibration sample block is a columnar or cubic block with a height of 1 / 2 of the height of the solid charging device.

8. The density measuring device for high-water content fine-grained coal or coal slime according to claim 7, characterized in that: The liquid feeding device and the solid charging device are fixed by an externally arranged fixing assembly, wherein the fixing assembly comprises a combination of a screw and a nut or a combination of a screw rod and a nut.

9. The density measuring device for high-water content fine-grained coal or coal slime according to claim 8, characterized in that: The scale line of the liquid feeding device has a scale accuracy of 0.1 mL, and the outer diameter of the elongated bottleneck is 0.5-1 cm; The fixed volume of the density measuring device is 0.5L-5L.

10. The density measuring device for high-water content fine-grained coal or coal slime according to claim 9, characterized in that: The measured mass of the dry material in the high-moisture fine-grained coal or coal slime is in the range of 10g-100g; The test samples are samples from the mine water that have been treated in the filter press workshop.

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