CN112629621A - Simple high-precision device and method for measuring height of mud layer of paste thickener - Google Patents
Simple high-precision device and method for measuring height of mud layer of paste thickener Download PDFInfo
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- CN112629621A CN112629621A CN202011384817.5A CN202011384817A CN112629621A CN 112629621 A CN112629621 A CN 112629621A CN 202011384817 A CN202011384817 A CN 202011384817A CN 112629621 A CN112629621 A CN 112629621A
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- mud layer
- paste thickener
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/40—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements
- G01F23/42—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using mechanically actuated indicating means
Abstract
The invention provides a simple high-precision device and method for measuring the height of a mud layer of a paste thickener, and belongs to the technical field of mine tailing paste measurement. The device comprises a wire wheel, a traction rope and a light container, wherein one end of the traction rope is wound on the wire wheel, the other end of the traction rope is connected with the light container, and tail mortar with the same concentration as tail mortar at a mud layer interface of a paste thickener is contained in the light container. The light container is lifted through the wire wheel and the traction rope with scales, and the concentration of the tail mortar is determined by a specific method. The method has the advantages of simplicity, low cost, easiness in operation and high precision, and overcomes the defects of low precision and complex device structure of the conventional mud layer height measuring method.
Description
Technical Field
The invention relates to the technical field of mine tailing paste measurement, in particular to a simple high-precision device and method for measuring the height of a mud layer of a paste thickener.
Background
The full-tailing paste filling and paste stacking have the advantages of safety, environmental protection, economy, high efficiency and the like, and are two technologies with development prospects in the field of mine tailing solid waste disposal. The method is characterized in that low-concentration tailing slurry generated by a concentrating mill is concentrated into a paste shape, the first key link of the tailing slurry treatment technology is realized, and a currently adopted main stream device is a slurry thickener. The height of the mud layer is a key parameter for the operation of the paste thickener, has important influence on the concentration of the underflow of the paste thickener, and directly determines whether the underflow discharged by the paste thickener can reach the state of the paste. Therefore, the height of the mud layer of the paste thickener must be detected in order to dynamically adjust the operating parameters of the paste thickener.
The traditional heavy hammer method for measuring the height of the mud layer of the paste thickener is simple to operate, but the measurement precision is not high, and the main reason is that the difference between the density of the heavy hammer and the density of the mud layer is obvious, so that the depth of the heavy hammer sunk into the mud layer is too large. At present, various mud layer height detection devices are developed based on the principle of a heavy hammer method, such as a device (CN210180501U) for measuring the height of a mud layer by a heavy hammer level gauge in flowing water and an automatic mud layer height measurement device and a measurement method (CN109357725A), but the devices are relatively complex in structure and the mud layer height measurement precision is not fundamentally improved. In addition, an ultrasonic mud layer interface instrument is also arranged, but the ultrasonic mud layer interface instrument is influenced by factors such as mud layer turbidity, bottom mud layer density change and the like, and has larger measurement error and volatility. Therefore, the development of the mud layer height measuring method of the paste thickener, which has high measuring precision and a simple structure, has important significance for ensuring the smooth application of the mine tailing paste disposal technology.
Disclosure of Invention
The invention aims to provide a simple high-precision device and a method for measuring the height of a mud layer of a paste thickener.
The device comprises a wire wheel, a traction rope, a light container and tail mortar, wherein one end of the traction rope is wound on the wire wheel, the other end of the traction rope is connected with the light container, and the light container is filled with the tail mortar; the lightweight container is placed at the mud layer interface.
Wherein, the hauling cable is provided with scales. And the light container is sealed after being filled with the tail mortar, and the overall density of the light container after being filled with the tail mortar is the same as that of the tail mortar at the mud layer interface of the paste thickener.
The tail mortar in the light container and the tail mortar entering the paste thickener are the same tail sand material.
The light container is in a static state at the mud layer interface of the paste thickener after being filled with the tail mortar.
The method for applying the device comprises the following steps:
s1: the light container is firmly tied at the zero scale of the traction rope, the light container is slightly lowered to the mud layer interface of the paste thickener by the rotating wire wheel, and the traction rope is ensured to be slightly tightened and is vertical to the overflow water surface of the paste thickener;
s2: and reading the reading of the hauling rope at the overflow water surface, and converting to obtain the height of the mud layer of the paste thickener according to the vertical height from the bottom of the mud layer of the paste thickener to the overflow water surface.
Wherein, S2 specifically is:
s21: dividing the paste thickener into a settling zone and a compacting zone (namely a mud layer) along the vertical direction by taking a mud layer interface of the paste thickener as a boundary; in the settling zone, the concentration of tail mortar is less than that of the tail mortar at the mud layer interface; in the compaction area, the concentration of tail mortar is greater than that of the tail mortar at the mud layer interface;
s22: defining the mud layer pressure at the mud layer interface of the paste thickener to be 0, and the mud layer pressure at the bottom of the paste thickener to be:
P＝Δρgφ0h0
wherein P is the pressure of the bottom mud layer of the paste thickener Pa; delta rho is the density difference between tailings and water, kg/m3(ii) a g is the acceleration of gravity, 9.8m/s2；h0M is the initial height of solid-liquid separation; phi is a0Is the initial volume concentration of the slurry,%;
s23: according to the conservation of mass of materials, the average concentration of the tail mortar is as follows:
wherein phi isavAverage concentration,%, of tail mortar in equilibrium; h isfThe final height of the solid-liquid separation, namely the height of a mud layer, m.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the method for measuring the height of the mud layer of the paste thickener is high in detection precision and low in cost, and is very simple in actual operation.
Drawings
FIG. 1 is a schematic structural view of a simple high-precision device for measuring the height of a mud layer of a paste thickener according to the invention;
fig. 2 is a schematic diagram of the solution of the concentration of the tail mortar at the mud layer interface of the paste thickener.
Wherein: 1-a wire wheel; 2-a traction rope; 3-a light container; 4-tail mortar; 5-a settling zone; 6-mud layer interface; 7-a mud layer; 8-the bottom of the mud layer; 9-overflow water surface.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a simple high-precision device and method for measuring the height of a mud layer of a paste thickener.
The method ensures that the light container stops sinking after contacting the mud layer, and improves the precision of measuring the height of the mud layer of the paste thickener.
As shown in fig. 1, the device comprises a reel 1, a traction rope 2, a light container 3 and tail mortar 4, wherein one end of the traction rope 2 is wound on the reel 1, the other end of the traction rope 2 is connected with the light container 3, and the light container 3 is filled with the tail mortar 4; the lightweight container 3 is placed at the mud layer interface 6.
Wherein, the hauling rope 2 is provided with scales.
And the light container 3 is sealed after being filled with the tail mortar 4, and the overall density of the light container 3 after being filled with the tail mortar 4 is the same as that of the tail mortar at the mud layer interface 6 of the paste thickener.
The tail mortar 4 contained in the light container 3 and the tail mortar entering the paste thickener are the same tail sand material.
The light container 3 is in a static state at the mud layer interface 6 of the paste thickener after being filled with the tail mortar 4.
The method for applying the device comprises the following steps:
s1: firmly tying the light container 3 at the zero scale of the traction rope 2, slightly lowering the light container 3 to the mud layer interface 6 of the paste thickener by rotating the wire wheel 1, and ensuring that the traction rope 2 is slightly tightened and is vertical to the overflow water surface 9 of the paste thickener;
s2: reading of the hauling rope 2 at the position of the overflow water surface 9 is read, and the height of the mud layer 7 of the paste thickener is obtained through conversion according to the vertical height from the bottom 8 of the mud layer of the paste thickener to the overflow water surface 9.
S2 specifically includes:
s21: dividing the paste thickener into a settling zone 5 and a compacting zone (namely a mud layer) along the vertical direction by taking a mud layer interface 6 of the paste thickener as a boundary; in the settling zone 5, the concentration of tail mortar is less than that of tail mortar at the mud layer interface 6; in the compaction area, the concentration of tail mortar is greater than that of 6 tail mortar at the mud layer interface;
s22: defining the mud layer pressure at the mud layer interface of the paste thickener to be 0, and the mud layer pressure at the bottom of the paste thickener to be:
P＝Δρgφ0h0 (1)
wherein P is the pressure of the bottom mud layer of the paste thickener Pa; delta rho is the density difference between tailings and water, kg/m3(ii) a g is the acceleration of gravity, 9.8m/s2；h0M is the initial height of solid-liquid separation; phi is a0Is the initial volume concentration of the slurry,%;
s23: according to the conservation of mass of materials, the average concentration of the tail mortar is as follows:
wherein phi isavAverage concentration,%, of tail mortar in equilibrium; h isfFor the final height of the solid-liquid separation (in a paste thickener, h)fNamely the height of the mud layer of the thickenerDegree; in the cylinder sedimentation test, hfThe final height of the mud layer in the measuring cylinder), and m.
In practical experiments, small-sized graduated cylinder sedimentation experiments are carried out indoors, the initial volume concentration of the tail mortar is the same as the feeding concentration of the paste thickener, and the initial sedimentation height is changed to obtain at least 2 groups (phi)avP) data. In the underflow concentration phiavThe vertical axis is the pressure P of the bottom mud layer, the horizontal axis is the pressure P of the bottom mud layer, linear fitting is adopted and the pressure P is extended to the vertical axis, and the intercept of the vertical axis is the concentration phi of the tail mortar when the pressure of the mud layer is zero, namely the concentration of the tail mortar at the mud layer interface of the paste thickener.
The following is described with reference to specific examples:
preparing tailing slurry with the same concentration as the feed material of the paste thickener by using the same dry tailing and water as the tailing entering the paste thickener, carrying out 4 sedimentation experiments in a measuring cylinder with the volume of 2000ml, wherein the volumes of the tailing slurry filled in the 4 experiments are respectively 500ml, 1000ml, 1500ml and 2000ml, and recording different initial sedimentation heights h0. Recording different final solid-liquid separation heights h after the height of the mud layer is not changed any moref. The flocculant basically has no influence on the underflow concentration, so the flocculant can be used in the sedimentation experiment.
4 groups (phi) are obtained by calculation according to the formula (1) and the formula (2)avAnd P), and then performing linear fitting (as shown in figure 2) to obtain the tail mortar concentration phi when the mud layer pressure P is zero, namely the tail mortar concentration of the mud layer interface of the paste thickener.
The same dry tailings and water as those entering the paste thickener are used to prepare tail mortar 4 with the same concentration as tail mortar at the mud layer interface of the paste thickener, and the lightweight container 3 is filled with the tail mortar. The mass of the lightweight container 3 is negligible compared to the mass of the tail mortar 4 loaded, so that the effect of the density of the lightweight container 3 is negligible.
And firmly tying a light container 3 filled with tail mortar 4 with the same concentration as tail mortar at the mud layer interface of the paste thickener at the zero scale position of the traction rope 2 with scales, and slightly rotating the wire wheel 1 to slowly lower the light container 3.
Concentration of tail mortar 4 in light container 3 and mud layer interface tail of paste thickenerThe mortar is of the same concentration and therefore the lightweight container 3 will not sink after reaching the mud layer interface 6. At the moment, the traction rope 2 with the mark is slightly tightened and is vertical to the overflow water surface 9, and the scale of the traction rope 2 at the overflow water surface 9 is read and recorded as H1。
Recording the vertical height H from the bottom 8 of the paste thickener mud layer to the overflow water surface 9, the height H of the paste thickener mud layer 72＝H-H1。
For safety, the test site should be selected behind the advancing direction of the rake frame of the paste thickener. The single test time is not more than 5 minutes, which is far less than the time required by one rotation of the rake frame, and the risk of the traction rope 2 winding with the rake frame of the paste thickener does not exist.
For the sake of accuracy, a plurality of point positions can be selected for carrying out the mud layer height test, and the average value of a plurality of test results is taken.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. The utility model provides a measure simple and easy high accuracy device of lotion thickener mud layer height which characterized in that: the wire wheel comprises a wire wheel (1), a traction rope (2), a light container (3) and tail mortar (4), wherein one end of the traction rope (2) is wound on the wire wheel (1), the other end of the traction rope (2) is connected with the light container (3), and the light container (3) is filled with the tail mortar (4); the light container (3) is arranged at the mud layer interface (6).
2. The simple high-precision device for measuring the mud layer height of the paste thickener according to claim 1, which is characterized in that: the traction rope (2) is provided with scales.
3. The simple high-precision device for measuring the mud layer height of the paste thickener according to claim 1, which is characterized in that: the light container (3) is sealed after being filled with the tail mortar (4), and the overall density of the light container (3) after being filled with the tail mortar (4) is the same as that of the tail mortar of the paste thickener mud layer interface (6).
4. The simple high-precision device for measuring the mud layer height of the paste thickener according to claim 1, which is characterized in that: the tail mortar (4) contained in the light container (3) and the tail mortar entering the paste thickener are the same tail sand material.
5. The simple high-precision device for measuring the mud layer height of the paste thickener according to claim 1, which is characterized in that: the light container (3) is in a static state at a mud layer interface (6) of the paste thickener after being filled with the tail mortar (4).
6. The method for applying the simple high-precision device for measuring the mud layer height of the paste thickener according to claim 1, is characterized in that: the method comprises the following steps:
s1: the light container (3) is firmly tied at the zero scale of the traction rope (2), the light container (3) is slightly lowered to the mud layer interface (6) of the paste thickener by rotating the wire wheel (1), and the traction rope (2) is ensured to be slightly tightened and is vertical to the overflow water surface (9) of the paste thickener;
s2: reading of the traction rope (2) at the position of the overflow water surface (9) is read, and the height of the mud layer (7) of the paste thickener is obtained through conversion according to the vertical height from the bottom (8) of the mud layer of the paste thickener to the overflow water surface (9).
7. The method for applying the simple high-precision device for measuring the mud layer height of the paste thickener according to claim 6, which is characterized in that: the S2 specifically includes:
s21: dividing the paste thickener into a settling zone (5) and a compacting zone along the vertical direction by taking a paste layer interface (6) of the paste thickener as a boundary; in the settling zone (5), the concentration of the tail mortar is less than that of the tail mortar at the mud layer interface (6); in the compaction area, the concentration of tail mortar is greater than that of the tail mortar at the mud layer interface (6);
s22: defining the mud layer pressure at the mud layer interface of the paste thickener to be 0, and the mud layer pressure at the bottom of the paste thickener to be:
P＝Δρgφ0h0
wherein P is the pressure of the bottom mud layer of the paste thickener Pa; delta rho is the density difference between tailings and water, kg/m3(ii) a g is the acceleration of gravity, 9.8m/s2；h0M is the initial height of solid-liquid separation; phi is a0Is the initial volume concentration of the slurry,%;
s23: according to the conservation of mass of materials, the average concentration of the tail mortar is as follows:
wherein phi isavAverage concentration,%, of tail mortar in equilibrium; h isfThe final height of the solid-liquid separation, namely the height of a mud layer of the thickener, m.
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Cited By (1)
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| CN116381209A (en) * | 2023-06-05 | 2023-07-04 | 山东黄金矿业科技有限公司充填工程实验室分公司 | Device for detecting concentration of tailings of thickener and method for regulating and controlling concentration of discharged tailings |
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