Slurry solid content detection device and aluminum oxide production line

Abstract

The utility model discloses a slurry solid content detection device and an aluminum oxide production line, and solves the technical problem of low solid content detection accuracy in the prior art. The slurry solid content detection device comprises: a slurry measurement assembly, which comprises a slurry metering kettle, a slurry level meter and a slurry weightometer, and the slurry metering kettle is provided with a first inlet for inflow of to-be-detected slurry and a second inlet for outflow of alkali liquor; the alkali liquor measuring assembly comprises an alkali liquor metering kettle, an alkali liquor weighing meter and an alkali liquor level meter, the alkali liquor metering kettle is provided with a third inlet, and the third inlet is communicated with the second inlet through a first driving part; and the controller is electrically connected with the slurry level meter, the slurry weightometer, the alkali liquor weightometer and the alkali liquor level meter so as to determine the solid content of the slurry according to the height of the slurry, the mass of the to-be-measured slurry, the height of the alkali liquor and the mass of the alkali liquor. The slurry solid content detection device provided by the utility model is high in detection result accuracy.

Description

Technical Field

[0001] This application belongs to the technical field of slurry solid content detection, and specifically relates to an alumina production line. Background Art

[0002] There are various mineral slurries in the alumina production line, such as bauxite slurry, red mud slurry, and aluminum hydroxide slurry, etc., and various alkaline slurries. During the alumina production process, it is necessary to monitor the solid content related parameters of these slurries.

[0003] In the related art, the density of the slurry is directly measured by an isotope densitometer, and then the solid content is obtained by combining with a formula conversion, resulting in low accuracy of the measurement result. Utility Model Content

[0004] To solve the current technical problems, this application provides a slurry solid content detection device and an alumina production line.

[0005] In the first aspect of this application, a slurry solid content detection device is provided, including:

[0006] A slurry measurement assembly, including a slurry measuring kettle, a slurry level gauge, and a slurry weighing scale. The slurry measuring kettle is provided with a first inlet for the to-be-detected slurry to flow in and a second inlet for the alkali solution to flow out. The slurry level gauge is used to measure the height of the slurry in the slurry measuring kettle, and the slurry weighing scale is used to weigh the mass of the to-be-detected slurry in the slurry measuring kettle;

[0007] An alkali solution measurement assembly, including an alkali solution measuring kettle, an alkali solution weighing scale, and an alkali solution level gauge. The alkali solution measuring kettle is provided with a third inlet, and the third inlet is connected to the second inlet through a first driving member. The alkali solution weighing scale is used to weigh the mass of the alkali solution in the alkali solution measuring kettle, and the alkali solution level gauge is used to measure the height of the alkali solution in the alkali solution measuring kettle.

[0008] In some embodiments, a slurry discharge valve is provided at the bottom of the slurry measuring kettle, and an alkali solution discharge valve is provided at the bottom of the alkali solution measuring kettle; the slurry measurement assembly further includes a feed pipe and a water inlet pipe. One end of the feed pipe is used to connect to the main pipe for the slurry to flow through in the alumina production line, and the other end is connected to the first inlet. One end of the water inlet pipe is connected to the feed pipe, and the other end is used to connect to a water source.

[0009] In some embodiments, a first stop valve is provided on the feed pipe, the output end of the first stop valve is close to the water inlet pipe, a second stop valve is provided on the water inlet pipe, and the slurry measuring kettle is provided with an overflow port.

[0010] In some embodiments, a third stop valve is provided on the feed pipe close to the slurry measuring kettle, and the input end of the third stop valve is close to the feed pipe.

[0011] In some embodiments, the feed pipe includes a first pipe section, a second pipe section, and a third pipe section arranged in sequence along the slurry flow direction. The second pipe section is arranged at an angle with both the first pipe section and the third pipe section. The first stop valve and the third stop valve are located at both ends of the second pipe section.

[0012] In some embodiments, the lye measuring assembly further includes a filter element for filtering the lye in the lye measuring pot. The lye measuring pot includes a bracket, an upper pot body, and a lower pot body. The upper pot body is mounted on the bracket. The filter element is located between the upper pot body and the lower pot body. The lye weighing meter is used to weigh the mass of the lye in the lower pot body, and the lye level gauge is used to measure the height of the lye in the lower pot body.

[0013] In some embodiments, the lye measuring assembly further includes a second driving member, a driving wheel, and a driven wheel. The second driving member is in transmission connection with the driving wheel. The driving wheel and the driven wheel are located on both sides of the lye measuring pot. The filter element is a roll of filter paper, and the roll of filter paper is sleeved outside the driven wheel. The head of the roll of filter paper passes between the upper pot body and the lower pot body and is wound around the driving wheel.

[0014] In some embodiments, the lye measuring assembly includes a support net installed on the lower pot body. The filtering area of the roll of filter paper is placed on the support net, and the support net is connected with a diversion plate.

[0015] In some embodiments, the lower pot body is provided with a vacuum port, and the lye measuring assembly includes a vacuum pump communicated with the vacuum port through a pipeline.

[0016] In a second aspect of the present application, there is provided an alumina production line, including:

[0017] A main pipeline for the slurry to flow through;

[0018] The aforementioned slurry solid content detection device, and a first inlet of the slurry measuring pot is communicated with the main pipeline.

[0019] The slurry solid content detection device provided by the embodiment of the present application includes a slurry measuring assembly, a lye measuring assembly, and a controller. The slurry measuring assembly is used to detect the mass and level of the to-be-detected slurry, and then the density of the to-be-detected slurry can be calculated therefrom. Then, the solid content of the slurry is calculated according to the slurry density. The lye measuring assembly is used to detect the mass and liquid level of the lye in the to-be-detected slurry. Then, the controller calculates the solid content of the slurry according to the slurry mass, slurry level, lye mass, lye level, and the formula can calculate the solid content of the slurry.

[0020] Since the density of the lye in the alumina production line is in a rapid dynamic change, compared with the calculation based on the lye density detected by sampling the slurry at fixed times and points in the related art, in this application, the lye separated above the slurry to be measured is directly detected, and the calculation is based on the density of this lye. Therefore, the calculation result of the solid content is highly accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structural schematic diagram of the slurry solid content detection device in one or more embodiments of this application is shown.

[0022] Figure 2 Shows Figure 1 The structural schematic diagram of the slurry measurement assembly of the slurry solid content detection device.

[0023] Figure 3 Shows Figure 1 The structural schematic diagram of the lye measurement assembly of the slurry solid content detection device.

[0024] Description of the reference numerals in the drawings:

[0025] 100 - Slurry measurement assembly, 101 - Feed pipe, 1011 - First pipe section, 1012 - Second pipe section, 1013 - Third pipe section, 102 - Water inlet pipe, 103 - First stop valve, 104 - Second stop valve, 105 - Third stop valve, 106 - Slurry measuring pot, 1061 - Overflow port, 107 - Slurry level gauge, 108 - Slurry weighing scale, 109 - Slurry discharge valve;

[0026] 200 - Lye measurement assembly, 201 - First driving member, 202 - Lye measuring pot, 2021 - Upper pot body, 2022 - Lower pot body, 203 - Filter member, 204 - Deflector, 205 - Lye level gauge, 206 - Vacuum driving member, 207 - Lye discharge valve, 208 - Lye weighing scale.

[0027] 1000 - Main pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to enable those skilled in the art in the technical field to which this application belongs to understand this application more clearly, the technical solutions in the embodiments of this application will be described clearly and completely below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0029] In the related art, the density of the slurry is measured in real time by a densitometer, and then based on the density of the lye detected after sampling the slurry at regular times and fixed points on the alumina production line, the solid content of the slurry is obtained after converting the density of the slurry measured in real time and the density of the lye measured by sampling at regular times and fixed points.

[0030] In the first aspect of the embodiments of the present application, a device for detecting the solid content of a slurry is provided, which is applicable to mixtures of lye and aluminum-containing compounds such as bauxite slurry, red mud slurry, and aluminum hydroxide slurry in the alumina production process, shields the influence of the lye concentration on the measurement of the slurry specific gravity, and has high accuracy of the detection result.

[0031] Please refer to Figure 1 、 Figure 2 and Figure 3 The device for detecting the solid content of a slurry provided by the embodiments of the present application includes a slurry measurement component, a lye measurement component 200, and a controller.

[0032] Please refer to Figure 2 The slurry measurement component 100 is used to detect the mass and volume of the slurry to be measured. The slurry measurement component 100 includes a slurry measuring pot 106, a slurry level gauge 107, and a slurry weighing scale 108. The slurry measuring pot 106 is provided with a first inlet for the slurry to be measured to flow in and a second inlet for the lye to flow out. The slurry level gauge 107 is used to measure the height of the slurry in the slurry measuring pot 106, and then calculate the volume of the slurry in the slurry measuring pot 106 according to the height. Specifically, in implementation, a cylindrical slurry measuring pot 106 with a known bottom area can be used, and the volume can be obtained by multiplying the bottom area by the slurry height, or the volume represented by different slurry levels in the slurry measuring pot 106 can be determined in advance, and the volume can be determined by directly looking up according to the height data. The slurry weighing scale 108 is used to weigh the mass of the slurry to be measured in the slurry measuring pot 106, and it can also be a weight sensor. The density of the slurry to be measured is calculated according to the mass and volume of the slurry measured by the slurry measurement component 100.

[0033] The lye measurement component 200 is used to detect the mass and volume of the lye in the slurry to be measured. Please refer to Figure 3 The lye measurement component 200 includes a lye measuring pot 202, a lye weighing scale 208, and a lye level gauge 205. The lye measuring pot 202 is provided with a third inlet, and the third inlet is connected to the second inlet through a first driving member 201 such as a micro pump, so that the upper layer of the lye in the slurry in the slurry measuring pot 106 can be pumped into the lye measuring pot 202 for detection. The lye weighing scale 208 is used to weigh the mass of the lye in the lye measuring pot 202, and it can be a gravity sensor. The lye level gauge 205 is used to measure the height of the lye in the lye measuring pot 202, and a liquid level sensor can be used, so that the volume of the lye in the lye measuring pot 202 can be known. Specifically, in implementation, the method for obtaining the volume of the slurry in the slurry measuring pot 106 can be referred to, and details are not described here.

[0034] The controller is electrically connected to the slurry level gauge 107, the slurry weighing meter 108, the lye weighing meter 208, and the lye level gauge 205. Therefore, the controller can obtain the slurry height, slurry mass, lye mass, and lye height, and thus determine the slurry volume and lye volume respectively according to the slurry height signal and the lye height signal. Then, according to the slurry volume and slurry mass, the slurry density is determined, and according to the lye volume and lye mass, the lye density is determined. Finally, according to the densities of the slurry and the lye, they are substituted into the formula: The solid content of the slurry can be calculated. Wherein, ρ S is the density of the solid in the slurry, which is determined by the material properties of the solid. For example, if the slurry to be measured is a bauxite slurry, ρ S is the density of bauxite. Since bauxite has a certain long-term use, the density of the ore is relatively fixed, and the density of bauxite can be obtained through analysis in other processes; ρ L is the density of the lye in the slurry, which is obtained by calculating the mass and volume of the lye measured by the lye measuring assembly 200, and ρ T is the density of the slurry to be measured, which is obtained by calculating the mass and volume of the slurry measured by the slurry measuring assembly 100.

[0035] Here, it needs to be explained that the above formula is derived from Formula 1 and Formula 2 ρ S = T / (1000 - L / S × T).

[0036] In some embodiments, a slurry discharge valve 109 is provided at the bottom of the slurry measuring pot 106, and an alkali solution discharge valve 207 is provided at the bottom of the alkali solution measuring pot 202. After the slurry detection is completed, the thick material of the slurry after removing the upper layer of alkali solution can be discharged through the slurry discharge valve 109, and the alkali solution can be discharged through the alkali solution discharge valve 207 after the alkali solution detection is completed. In addition, the slurry measuring assembly 100 further includes a feed pipe 101 and a water inlet pipe 102. One end of the feed pipe 101 is used to communicate with the main pipe 1000 for the slurry to flow in the alumina production line, and the other end is connected to the first inlet. One end of the water inlet pipe 102 is connected to the feed pipe 101, and the other end is used to communicate with the water source. In this way, the slurry can enter the slurry measuring pot 106 from the main pipe 1000 along the feed pipe 101 for the detection of the liquid level and quality. After the detection is completed, the cleaning water can enter the slurry measuring pot 106 through the water inlet pipe 102 and the feed pipe 101 and be discharged through the slurry discharge valve 109 to clean the slurry measuring pot 106. After the cleaning of the slurry measuring pot 106 is completed, the slurry discharge valve 109 can be closed to accumulate the cleaning water in the slurry measuring pot 106, and then the cleaning water is pumped from the slurry measuring pot 106 into the alkali solution measuring pot 202 for cleaning by the first driving member 201. The water after the cleaning is discharged through the alkali solution discharge valve 207 to improve the accuracy of the next detection. In some other embodiments, a water inlet can also be opened on the slurry measuring pot 106 to communicate with the external water source, and the cleaning of the slurry measuring pot 106 can also be realized.

[0037] In certain embodiments, a first stop valve 103 is provided on the feed pipe 101. The output end of the first stop valve 103 is close to the water inlet pipe 102. The first stop valve 103 is used to conduct or close the feed pipe 101 to allow the slurry in the main pipe 1000 to enter the slurry measuring pot 106 when detection is needed. A second stop valve 104 is provided on the water inlet pipe 102, and an overflow port 1061 is provided on the slurry measuring pot 106. The second stop valve 104 is used to conduct or close the water inlet pipe 102. When cleaning is needed, the cleaning water can enter the slurry measuring pot 106 through the water inlet pipe 102 and the feed pipe 101, and then be discharged through the slurry discharge valve 109. After the rinsing of the slurry measuring pot 106 is completed and the slurry measuring pot 106 is cleaned, the slurry discharge valve 109 is closed. When the liquid level reaches the height of the overflow port 1061, the cleaning water is discharged from the overflow port 1061. At this time, the cleaning water in the slurry measuring pot 106 can be pumped into the alkali solution measuring pot 202 for cleaning by the first driving member 201. To improve the degree of automation, the second stop valve 104 can be an electrically controlled stop valve, such as a solenoid valve, which is electrically connected to the controller and controlled by the controller to open or close the second stop valve 104.

[0038] In some embodiments, the feed pipe 101 is provided with a third shut-off valve 105 near the slurry metering pot 106. The input end of the third shut-off valve 105 is near the feed pipe 101. The third shut-off valve 105 shuts off the feed pipe 101. When the first shut-off valve 103 is stuck, the second shut-off valve 104 is opened, so that the cleaning water can pass through the feed pipe 101 and be discharged into the main flow channel 1000 to clean the feed pipe 101 and improve the accuracy of the next slurry detection.

[0039] In some embodiments, the feed pipe 101 includes a first pipe section 1011, a second pipe section 1012, and a third pipe section 1013 arranged in sequence along the slurry flow direction. The second pipe section 1012 is arranged at an angle with both the first pipe section 1011 and the third pipe section. The first shut-off valve 103 and the third shut-off valve 105 are located at both ends of the second pipe section 1012. The first opening of the slurry metering pot 106 faces upward, and its height is different from that of the main pipe 1000. The communication between the slurry metering pot 106 and the main pipe 1000 is achieved through the angled first pipe section 1011, second pipe section 1012, and third pipe section 1013. In some embodiments, the angle between the first pipe section 1011 and the horizontal direction is 70° to 80°, for example 75°. This angle is close to the stacking angle of the slurry solid content, which can prevent the material from accumulating and clogging in the first pipe section 1011 when the first shut-off valve 103 is closed. When selecting the type of valve, the first shut-off valve 103 can be a right-angle valve. The input end and the output end of the first shut-off valve 103 are respectively connected to the first pipe section 1011 and the second pipe section 1012. Compared with an ordinary shut-off valve, the right-angle valve has no material dead zone, is not easy to accumulate material on both sides of the gate plate, and reduces the risk of valve blockage. Due to the selection of the right-angle valve and the angle setting of the first pipe section 1011, the second pipe section 1012 has an angle with the horizontal direction, and the third pipe section 1013 can be arranged vertically, so that an obtuse angle can be formed between the second pipe section 1012 and the third pipe section 1013. At this time, the third shut-off valve 105 can select an ordinary valve with a relatively low price compared to the right-angle valve, which is not easy to block and also reduces the cost. Since the slurry pressure in the main pipe 1000 is relatively high, even if the height of the second pipe section 1012 is higher than that of the main pipe 1000, the slurry can still enter the feed pipe 101 under its own pressure.

[0040] In some embodiments, the alkali liquid measuring assembly 200 further includes a filter element 203 for filtering the alkali liquid within the alkali liquid metering pot 202. The alkali liquid metering pot 202 includes a bracket, an upper pot body 2021, and a lower pot body 2022. The upper pot body 2021 is mounted on the bracket, and the upper pot body 2021 is fixed by the bracket so that the alkali liquid weighing meter 208 is only used to weigh the mass of the alkali liquid within the lower pot body 2022. Of course, the upper pot body 2021 can also be pressed against the lower pot body 2022 to improve the sealing performance between the two. After the filtration is completed, the upper pot body 2021 is raised, and the alkali liquid quality signal sent by the alkali liquid weighing meter 208 is obtained. The filter element 203 is located between the upper pot body 2021 and the lower pot body 2022 to filter the alkali liquid. The alkali liquid level meter 205 is used to measure the height of the alkali liquid within the lower pot body 2022. The alkali liquid pumped into the alkali liquid metering pot 202 by the first driving member 201 may contain solid matter, which will affect the detection results of the volume and quality of the alkali liquid. The filter member 203 can filter out the solid matter, thereby improving the detection accuracy of the volume and quality of the alkali liquid.

[0041] For the filter element 203, filter paper can be selected, but the filter paper must be replaced after being used for a period of time. In the case of selecting filter paper, in order to improve the degree of automation, the alkali solution measuring assembly 200 also includes a second driving member, a driving wheel and a driven wheel (not shown in the figure), the second driving member is connected to the driving wheel, the driving wheel and the driven wheel are located on both sides of the alkali solution metering pot 202, the filter element 203 is a filter paper roll, the filter paper roll is sleeved outside the driven wheel, the head of the filter paper roll passes between the upper kettle body 2021 and the lower kettle body 2022, and is wrapped around the driving wheel. The second driving member, such as a motor, rotates, driving the driving wheel to rotate, so that the filter paper is transferred from the driven wheel to the driving wheel, so that the new filter paper on the driven wheel passes through the space between the upper kettle body 2021 and the lower kettle body 2022, completing the filtration. For more information about the drive structure of the filter paper, please refer to the prior art disclosure, and this application will not go into details. In other embodiments, the filter element 203 can also be selected from filtering structures such as ceramic filter elements, which can also achieve filtration of the alkali solution.

[0042] When the filter element 203 is a filter paper roll, the upper pot body 2021 can be connected to the bracket in a reciprocating manner along the height direction, for example, by a motor threaded rod. The motor is located at the top of the bracket, and the output end of the motor is connected to the upper pot body 2021 through a threaded rod. The bracket is provided with a slide rail, and the upper pot body 2021 is provided with a slider. The upper pot body 2021 is raised and lowered relative to the bracket by rotating the motor. When there is a gap between the upper pot body 2021 and the lower pot body 2022, the filter paper can pass smoothly through the space between the upper pot body 2021 and the lower pot body 2022.

[0043] To improve the sealing performance between the upper pot body 2021 and the lower pot body 2022, a sealing ring can be provided on the upper pot body 2021, and the lower pot body 2022 is arranged in contact with the sealing ring.

[0044] To improve the filtration efficiency, in some embodiments, the lye measurement assembly 200 includes a support net installed on the lower pot body 2022. The filtration area of the filter paper roll is placed on the support net, and the support net is connected to a diversion plate 204, so that the lye drips into the lower pot body 2022 along the diversion plate 204. In other embodiments, the lower pot body 2022 is provided with a vacuum port, and the lye measurement assembly 200 includes a vacuum driving member connected to the vacuum port through a pipeline, such as a vacuum pump, to achieve negative pressure filtration through the vacuum pump to further improve the filtration efficiency.

[0045] In the embodiments of the second aspect of the present application, an alumina production line is provided. The alumina production line can on-line measure the solid content of mixtures such as bauxite slurry, red mud slurry, and aluminum hydroxide slurry, which are lye and aluminum-containing compounds, and the detection results are highly accurate.

[0046] The alumina production line includes a main pipeline 1000 and a slurry solid content detection device according to any one of the embodiments of the first aspect. Any one of the ore slurry, red mud slurry, and aluminum hydroxide slurry can flow through the main pipeline 1000. The first inlet of the slurry measuring pot 106 is communicated with the main pipeline 1000. Specifically, during implementation, the feed pipe 101 is communicated with the main pipeline 1000.

[0047] The controller can either be an independent controller electrically connected to the control unit of the alumina production line, or the control unit of the alumina production line can directly serve as the controller of the slurry solid content detection device, and is electrically connected to the slurry level gauge 107, the slurry weighing scale 108, the lye weighing scale 208, and the lye level gauge 205, and directly calculates the solid content of the slurry according to the slurry level, the slurry mass, the lye liquid level, the lye mass, the density of the solid in the slurry, and the formula directly calculates the solid content of the slurry.

[0048] The use process of the slurry solid content detection device provided by the present application is as follows:

[0049] In the initial state, the first stop valve 103 (angle valve), the second stop valve 104, and the third stop valve 105 are all in the closed state, the slurry discharge valve 109 and the lye discharge valve 207 are both in the open state, and the first driving member 201 and the vacuum driving member are in the stopped state.

[0050] Measurement process: Open the first shut-off valve 103 and the third shut-off valve 105. The slurry in the main pipeline 1000 enters the slurry measuring pot 106. The slurry flows out from the slurry discharge valve 109. After the slurry measuring pot 106 is rinsed, close the slurry discharge valve 109. The slurry accumulates in the slurry measuring pot 106. After the liquid level reaches the specified height, close the first shut-off valve 103 and the third shut-off valve 105. After the liquid level of the slurry measuring pot 106 stabilizes, record the liquid level in the slurry measuring pot 106 measured by the slurry level gauge, and record the weight of the slurry in the slurry measuring pot 106 measured by the slurry weighing scale 108, and calculate the slurry density ρ T ; Let it stand for 1 minute, turn on the first driving member 201, pump the upper-layer caustic liquid in the slurry measuring pot 106 into the upper pot body 2021 by a pump. After pumping to a fixed liquid level, turn off the first driving member 201. Turn on the vacuum driving member 206. The filtrate after passing through the filter paper enters the lower pot body 2022. After the suction filtration is completed, turn off the vacuum driving member 206. Record the liquid level in the lower pot body 2022 measured by the caustic liquid level gauge 205, and record the weight of the caustic liquid in the lower pot body 2022 measured by the caustic liquid weighing scale 208, and calculate the caustic liquid density ρ L , and then according to the formula the solid content of the slurry can be calculated.

[0051] Finally, open the slurry discharge valve 109 and the caustic liquid discharge valve 207 to discharge the slurry in the slurry measuring pot 106 and the caustic liquid in the lower pot body 2022. The upper pot body 2021 moves upward, driven by the second driving member, the filter paper moves forward for replacement, and the upper pot body 2021 moves downward to contact the lower pot body 2022.

[0052] Cleaning process: Open the second shut-off valve 104 and the third shut-off valve 105. The cleaning water enters the slurry measuring pot 106 for rinsing. After 1 minute, close the slurry discharge valve 109. Wait until the water level in the slurry measuring pot 106 rises until it flows out from the overflow port 1061 to complete the cleaning of the slurry measuring pot 106. Then close the third shut-off valve 105, open the first shut-off valve 103, and close the first shut-off valve 103 after 30 seconds to complete the cleaning of the feed pipe 101. Then turn on the first driving member 201 to pump the water in the slurry measuring pot 106 into the upper pot body 2021, turn on the vacuum driving member 206, and the clear water flows into the lower pot body 2022 to complete the cleaning of the upper pot body 2021 and the lower pot body 2022.

[0053] The slurry solid content detection device and the alumina production line provided by this application have at least the following advantages:

[0054] (1) This application directly detects the lye separated above the slurry to be measured, and uses the density of this lye as the calculation basis. Therefore, all the data used are real-time data of the slurry to be measured, ensuring the accuracy of the solid content detection result. It also solves the problem that there is a lack of online analysis equipment for key technical indicators in the current alumina production process, and the lag of the artificial sampling analysis results leads to the inability to achieve precise control in the alumina production process, resulting in large production fluctuations, unstable process technical indicators, increased system consumption, and increased alumina cost.

[0055] (2) The feed pipe 101 adopts a three-section design to control the angle of the first pipe section 1011, reducing the risk of the feed pipe 101 being blocked during the online detection of the slurry; combined with a right-angle valve, it further ensures smooth feeding.

[0056] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0057] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0058] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In addition, in this application, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0060] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A slurry solid content detection device, characterized in that, Comprising: A slurry measurement assembly, including a slurry metering pot, a slurry level gauge, and a slurry weighing scale. The slurry metering pot is provided with a first inlet for the incoming slurry to flow in and a second inlet for the lye in the slurry to flow out. The slurry level gauge is used to measure the height of the slurry in the slurry metering pot, and the slurry weighing scale is used to weigh the mass of the slurry in the slurry metering pot; A lye measurement assembly, including a lye metering pot, a lye weighing scale, and a lye level gauge. The lye metering pot is provided with a third inlet, and the third inlet is connected to the second inlet through a first driving member. The lye weighing scale is used to weigh the mass of the lye in the lye metering pot, and the lye level gauge is used to measure the height of the lye in the lye metering pot; A controller, electrically connected to the slurry level gauge, the slurry weighing scale, the lye weighing scale, and the lye level gauge respectively, to determine the solid content of the slurry according to the height of the slurry, the mass of the incoming slurry, the height of the lye, and the mass of the lye.

2. The slurry solid content detection device according to claim 1, wherein A slurry discharge valve is provided at the bottom of the slurry metering pot, and a lye discharge valve is provided at the bottom of the lye metering pot; the slurry measurement assembly further includes a feed pipe and a water inlet pipe. One end of the feed pipe is used to connect to the main pipe for the slurry to flow in the alumina production line, and the other end is connected to the first inlet. One end of the water inlet pipe is connected to the feed pipe, and the other end is used to connect to a water source.

3. The slurry solid content detection device according to claim 2, wherein The feed pipe is provided with a first stop valve, the output end of the first stop valve is close to the water inlet pipe, the water inlet pipe is provided with a second stop valve, and the slurry metering pot is provided with an overflow port.

4. The slurry solid content detection device according to claim 3, characterized in that, The feed pipe is provided with a third stop valve close to the slurry metering pot, and the input end of the third stop valve is close to the feed pipe.

5. The slurry solid content detection device according to claim 4, wherein, The feed pipe includes a first pipe section, a second pipe section, and a third pipe section arranged in sequence along the slurry flow direction. The angle between the first pipe section and the horizontal direction is 70° - 80°. The second pipe section is arranged at an angle with both the first pipe section and the third pipe. The first stop valve is a right-angle valve, and the input end and the output end of the first stop valve are respectively connected to the first pipe section and the second pipe section. The third stop valve is located at the output end of the second pipe section.

6. The slurry solid content detection device according to any one of claims 1-5, characterized in that, The lye measurement assembly further includes a filter element for filtering the lye in the lye metering pot. The lye metering pot includes a bracket, an upper pot body, and a lower pot body. The upper pot body is installed on the bracket, and the filter element is located between the upper pot body and the lower pot body. The lye weighing scale is used to weigh the mass of the lye in the lower pot body, and the lye level gauge is used to measure the height of the lye in the lower pot body.

7. The slurry solid content detection device according to claim 6, characterized in that, The lye measurement assembly further includes a second driving member, a driving wheel, and a driven wheel. The second driving member is in transmission connection with the driving wheel. The driving wheel and the driven wheel are located on both sides of the lye metering pot. The filter element is a filter paper roll, and the filter paper roll is sleeved outside the driven wheel. The head of the filter paper roll passes between the upper pot body and the lower pot body and is wound around the driving wheel.

8. The slurry solid content detection device according to claim 7, characterized in that, The lye measuring assembly includes a support mesh installed on the lower pot body, the filtering area of the filter paper roll is placed on the support mesh, and the support mesh is connected with a diversion plate.

9. The slurry solid content detection device according to claim 7, characterized in that, The lower pot body is provided with a vacuum port, and the lye measuring assembly includes a vacuum driving member communicated with the vacuum port through a pipeline.

10. An alumina production line, characterized in that, Comprising: A main pipeline for the slurry to flow through; The slurry solid content detection device according to any one of claims 1-9, and a first inlet of the slurry measuring pot is communicated with the main pipeline.

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