A slurry solid content detection system and method thereof

Abstract

Embodiments of the present application provide a slurry solid content detection system and method thereof, the system comprising: a metering jug for storing a slurry to be measured, comprising a first metering container and a second metering container, a liquid inlet being formed on an upper end surface of the first metering container, a liquid outlet being formed on a lower end surface of the first metering container and being in communication with a liquid inlet formed on an upper end surface of the second metering container, a cross-sectional area of the first metering container being smaller than a cross-sectional area of the second metering container; and a processing center for calculating a solid content of the slurry to be measured according to attribute data associated with the slurry to be measured, height data measured by a level meter, and weight data measured by a weighing scale. The technical solution provided by embodiments of the present application can improve the detection accuracy of the solid content of the slurry.

Description

Technical Field

[0001] This application relates to the field of detection technology, and more specifically, to a slurry solids content detection system and method. Background Technology

[0002] In the production process of certain alkaline substances, it is necessary to detect the solid content of the slurry to control the quality of the alkaline substances. For example, in the production of alumina, the solid content analysis of the slurry is mostly based on manual sampling, which leads to a lag in the analysis results and makes it impossible to accurately control the alumina production process. Because the production process of these alkaline substances involves a strongly alkaline, high-temperature, and high-pressure system, and is prone to scaling, online detection of the slurry solid content is very difficult. Although existing technologies utilize ultrasonic impedance principles or isotope densitometers for online detection of slurry solid content, the ultrasonic impedance principle is easily affected by factors such as material foam, high temperature, and high pressure, resulting in low detection accuracy. Isotope densitometers pose safety risks due to radiation. Therefore, improving the detection accuracy and safety of slurry solid content is an urgent technical problem to be solved. Summary of the Invention

[0003] The embodiments of this application provide a slurry solid content detection system and method. Based on the technical solution provided in this application, the detection accuracy of slurry solid content can be improved, and online automatic detection of slurry solid content can be realized during the production process, thereby improving the safety of slurry solid content detection.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the embodiments of this application, a slurry solids content detection system is provided. The system includes: a metering vessel for storing a slurry to be tested, comprising a first metering container and a second metering container, wherein the first metering container has an inlet on its upper end face and an outlet on its lower end face that communicates with the inlet on the upper end face of the second metering container, and the cross-sectional area of ​​the first metering container is smaller than that of the second metering container; a level gauge located above the metering vessel for measuring the height of the slurry to be tested stored in the metering vessel; a weighing meter located below the metering vessel for measuring the weight of the slurry to be tested stored in the metering vessel; and a processing center for calculating the solids content of the slurry to be tested based on attribute data associated with the slurry to be tested, the height data measured by the level gauge, and the weight data measured by the weighing meter.

[0006] In some embodiments of this application, based on the foregoing scheme, the system further includes: a level gauge, disposed on the second metering container, for monitoring the level of the slurry to be tested flowing into the second metering container, and generating an alert signal when the level of the slurry to be tested is detected to rise to a set position.

[0007] In some embodiments of this application, based on the foregoing scheme, the system further includes: a shut-off valve, used to stop supplying the slurry to be tested to the metering vessel when a shut-off command is received based on the reminder signal; and an injection pump, connected to the metering vessel, used to provide a preset volume of defoaming liquid to the metering vessel when a dispensing command is received based on the reminder signal, so as to eliminate foam in the slurry to be tested.

[0008] In some embodiments of this application, based on the foregoing scheme, the system further includes: a buffer tank with an inlet at the top, and the outlet of the buffer tank is connected to the inlet of the first metering container through a slurry conveying pipe to reduce the feeding pressure of the slurry to be tested.

[0009] In some embodiments of this application, based on the foregoing scheme, the system further includes: a discharge port, disposed on the slurry conveying pipeline, for discharging the slurry to be tested before conveying it to the metering vessel, so as to stabilize the flow rate of the slurry to be tested in the slurry conveying pipeline.

[0010] In some embodiments of this application, based on the foregoing scheme, the system further includes: a discharge control valve, disposed at the discharge port, used to stop supplying the slurry to be tested to the discharge port and start supplying the slurry to be tested to the metering vessel after the flow rate of the slurry to be tested in the slurry conveying pipeline has stabilized; and a splash guard, disposed above the metering vessel, used to prevent the slurry to be tested flowing into the metering vessel from splashing down.

[0011] In some embodiments of this application, based on the foregoing scheme, the system further includes: a drain pipe connected to the outlet of the second metering container for draining the slurry to be tested stored in the metering vessel; and a cleaning port for providing cleaning fluid to the detection system after draining the slurry to be tested stored in the metering vessel, so as to clean the various devices in the detection system.

[0012] According to a second aspect of the embodiments of this application, a method for detecting the solid content of a slurry is provided. The method includes: acquiring attribute data associated with the slurry to be tested, height data measured by a level gauge, and weight data measured by a weighing gauge; and calculating the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data.

[0013] In some embodiments of this application, based on the foregoing scheme, the attribute data includes the solid density and alkaline solution density of the slurry to be tested. The step of calculating the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data includes: obtaining the volume and weight of defoaming liquid consumed during the detection of the solid content of the slurry to be tested; determining the slurry density of the slurry to be tested based on the consumed volume, the consumed weight, the height data, and the weight data; and calculating the solid content of the slurry to be tested based on the slurry density, the solid density, and the alkaline solution density.

[0014] In some embodiments of this application, based on the foregoing scheme, determining the slurry density of the slurry to be tested based on the consumed volume, the consumed weight, the height data, and the weight data includes: obtaining the container volume and container height of the second metering container, and the bottom area of ​​the first metering container; determining the slurry volume of the slurry to be tested stored in the metering vessel based on the height data, the container volume, the container height, the bottom area, and the consumed volume; determining the slurry weight of the slurry to be tested stored in the metering vessel based on the weight data and the consumed weight; and calculating the slurry density of the slurry to be tested based on the slurry volume and the slurry weight.

[0015] The technical solution of this application provides a system for detecting the solid content of a slurry. This system mainly includes a metering vessel for storing the slurry to be tested; a level gauge for measuring the height of the slurry stored in the metering vessel; a weighing gauge for measuring the weight of the slurry stored in the metering vessel; and a processing center for calculating the solid content of the slurry. In this application's detection system, the metering vessel is designed as a container with a special structure, including a first metering container and a second metering container. The cross-section of the first metering container is designed to be smaller than that of the second metering container. This makes the measurement of the height of the slurry stored in the metering vessel more accurate, resulting in a more accurate volume of the slurry and ultimately a more accurate calculated solid content, thus improving the detection accuracy of the slurry solid content. Furthermore, by designing an injection pump in this application's detection system, foam in the slurry stored in the metering vessel can be eliminated, further improving the detection accuracy of the slurry solid content.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0018] Figure 1 A schematic diagram of the architecture of a slurry solids content detection system according to an embodiment of this application is shown;

[0019] Figure 2 A schematic flowchart of a slurry solids content detection method according to an embodiment of this application is shown;

[0020] Figure 3 A detailed flowchart illustrating the calculation of the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data according to one embodiment of this application is shown.

[0021] The annotations in the attached figures are explained as follows:

[0022] 100—Measuring jug, 110—First measuring container,

[0023] 111—Liquid inlet, 120—Second metering container,

[0024] 121—Liquid outlet, 200—Level gauge

[0025] 300—Weighing gauge, 400—Level gauge

[0026] 500—Injection pump, 600—Buffer tank

[0027] 610—Liquid inlet, 700—Slurry conveying pipe,

[0028] 710—Discharge port, 720—Discharge control valve

[0029] 800—Processing Center

[0030] 10—Close valve, 20—Splash guard,

[0031] 30—Drainage pipe, 40—Cleaning port,

[0032] 50—Liquid inlet pipe. Detailed Implementation

[0033] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0034] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0037] The following detailed description of some embodiments of this application will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] It should be noted that the slurry solids content detection system and method provided in this application are applicable to the online detection of slurry solids content during the production of alkaline substances. The technical solution of this application can be selected and applied according to the specific production conditions. The technical solution of this application is particularly suitable for the online detection of slurry solids content during alumina production.

[0039] According to a first aspect of the embodiments of this application, a slurry solids content detection system is provided.

[0040] See Figure 1 The diagram shows a schematic architecture of a slurry solids content detection system according to an embodiment of this application.

[0041] In some embodiments, the slurry solids content detection system includes a metering pot 100, a level gauge 200, a weighing meter 300, and a processing center 800.

[0042] The metering vessel 100 is used to store the slurry to be tested. It can be understood that the slurry in the production process is transported to the metering vessel 100 for storage, so that the slurry to be tested stored in the metering vessel 100 can be detected to obtain the solid content of the slurry to be tested.

[0043] See Figure 1 The measuring vessel 100 includes a first measuring container 110 and a second measuring container 120, wherein Figure 1 The square portion shown, containing number 1, is the first measuring container 110. Figure 1 The rectangular portion shown as #2 is the second metering container 120. The first metering container 110 has an inlet 111 on its upper surface and an outlet on its lower surface that communicates with the inlet on the upper surface of the second metering container 120. The cross-sectional area of ​​the first metering container 110 is smaller than that of the second metering container 120.

[0044] In some embodiments, the first measuring container 110 is a regular container, such as a cylindrical container, a cuboid container, a cube container, etc., and the cross-sectional area of ​​the first measuring container 110 is smaller than the cross-sectional area of ​​the second measuring container 120. It should be noted that this cross-sectional area refers to the section perpendicular to the height of the container. For example, the second measuring container 120 is designed as a cylindrical container with a cross-sectional diameter of 4cm-8cm.

[0045] In some embodiments, the second measuring container 120 is a regular container with a fixed volume, such as a cylindrical container, a rectangular container, a cube container, etc., and it is best to have the same shape design as the first measuring container 110. For example, the second measuring container 120 is designed as a 1L cylindrical container.

[0046] It can be understood that the first metering container 110 and the second metering container 120 constitute the metering vessel 100. The slurry to be tested flows into the metering vessel 100 from the inlet 111 opened on the upper end face of the first metering container 110, so that the slurry to be tested gradually rises to the liquid level from the bottom of the second metering container 120.

[0047] See also Figure 1 In some embodiments, the detection system of this application also includes a level gauge 400.

[0048] A level gauge 400 is installed on the second metering container 120 to monitor the level of the slurry to be tested flowing into the second metering container 120. When the level of the slurry to be tested is detected to rise to a set position, an alarm signal is generated.

[0049] In some embodiments, the level gauge 400 is a tuning fork level gauge, but it can also be other sensors with liquid level monitoring functions. This application does not make any specific limitations here.

[0050] In some implementations, the set position is the location of the level gauge 400.

[0051] In some implementations, it can be as follows Figure 1 As shown, the level gauge 400 is positioned close to the upper surface of the second metering container 120. When the level of the slurry to be tested, which is delivered to the second metering container 120, gradually rises to the position of the level gauge 400, it means that the slurry to be tested has basically filled the second metering container 120. At this time, the level gauge 400 will issue a warning signal.

[0052] See also Figure 1 In some embodiments, the detection system of this application further includes a shut-off valve 10 and an injection pump 500.

[0053] The shut-off valve 10 is used to stop supplying the slurry to be tested to the metering vessel 100 when a shut-off command is received based on the reminder signal.

[0054] In some implementations, when the level gauge 400 detects that the level of the slurry to be tested has risen to a set position, an alarm signal is generated and sent to the processing center 800, which then generates a shutdown command and sends it to the shutdown valve 10.

[0055] In some embodiments, the shut-off valve 10 is positioned as follows: Figure 1 The liquid inlet pipe 50 shown is connected to the production process. Alternatively, it can be installed on... Figure 1 Specifically, this application does not impose specific restrictions on the location of the shut-off valve 10 on the slurry conveying pipeline 700 shown. It can be designed according to the actual situation, as long as it can stop conveying the slurry to be tested to the metering pot 100 when it receives the shut-off command sent by the processing center 800.

[0056] See also Figure 1 The injection pump 500 is connected to the metering vessel 100 and is used to provide a preset volume of defoaming liquid to the metering vessel 100 when a dispensing instruction is received based on the reminder signal, so as to eliminate the foam in the slurry to be tested.

[0057] In some embodiments, the injection pump 500 can be connected to the inlet 111 on the upper surface of the first metering container 110 via an antifoaming liquid pipe, or it can be connected to the antifoaming liquid inlet on the upper surface of the first metering container 110 via an antifoaming liquid pipe. Specifically, this application does not make specific limitations here, and the design can be made according to the actual situation.

[0058] In some embodiments, the defoaming liquid can be water or other liquids that can eliminate foam in the slurry to be tested. In particular, this application does not limit the specific application.

[0059] In some embodiments, the preset volume can be set to 40ml, 50ml, 60ml, etc. Specifically, this application does not limit it, but 50ml is preferred.

[0060] In some implementations, when the level gauge 400 detects that the level of the slurry to be tested has risen to a set position, an alarm signal is generated and sent to the processing center 800, which then generates a discharge command to the injection pump 500.

[0061] It should be noted that after the shut-off valve 10 stops supplying the slurry to be tested to the metering vessel 100, some residual slurry in the pipeline will continue to flow into the metering vessel 100, thus the liquid level of the slurry to be tested in the metering vessel 100 will continue to rise. In addition, when the injection pump 500 supplies defoaming liquid to the metering vessel 100, the liquid level of the slurry to be tested in the metering vessel 100 will also change, ultimately causing the liquid level of the slurry to be tested stored in the metering vessel 100 to be within the first metering container 110.

[0062] It is understood that in this application, by controlling the injection pump 500 to provide defoaming liquid to the slurry to be tested stored in the metering vessel 100, the foam on the surface of the slurry to be tested can be effectively and quickly eliminated during the spraying process, thereby avoiding the technical problem of reduced measurement accuracy caused by the presence of foam.

[0063] It should be noted that in this application, the specific implementation method for conveying the slurry to be tested to the metering vessel 100 in the production process is not limited. Specifically, it can be that the inlet 111 of the first metering container 110 in the metering vessel 100 is directly connected to the inlet pipe 50 connected to the production process, or it can be as follows: Figure 1 As shown, a buffer tank 600 and a slurry conveying pipe 700 are set up.

[0064] See Figure 1 In the detection system of this application, a buffer tank 600 is provided, and an inlet 610 is provided on the top of the buffer tank 600. The outlet of the buffer tank 600 is connected to the inlet 111 of the first metering container 110 through a slurry conveying pipe 700, so as to reduce the feeding pressure of the slurry to be tested.

[0065] It is understandable that the inlet 610 of the buffer tank 600 is connected to the inlet pipe 50, so the slurry to be tested in the production process will be first transported to the buffer tank 600.

[0066] In some embodiments, the shut-off valve 10 is provided as follows:Figure 1 As shown, when the processing center 800 of the detection system receives the detection task, it will send an opening command to the shut-off valve 10. When the shut-off valve 10 receives the opening command, it will open the valve, allowing the slurry to be tested in the production process to flow into the buffer tank 600.

[0067] It should be noted that the flow rate of the inlet 610 of the buffer tank 600 can be set to be less than the flow rate of the outlet of the buffer tank 600, so as to ensure that there is no residual slurry in the buffer tank 600 during the process of conveying the slurry to be tested to the metering pot 100.

[0068] See also Figure 1 In some embodiments, the detection system of this application further includes a discharge port 710 and a discharge control valve 720.

[0069] The discharge port 710 is provided on the slurry conveying pipe 700 and is used to discharge the slurry to be tested before conveying it to the metering pot 100, so as to stabilize the flow rate of the slurry to be tested in the slurry conveying pipe 700.

[0070] The discharge control valve 720 is located at the discharge port 710 and is used to stop supplying the slurry to be tested to the discharge port 710 and start supplying the slurry to be tested to the metering vessel 100 after the flow rate of the slurry to be tested in the slurry conveying pipeline 700 has stabilized.

[0071] In some embodiments, the discharge control valve 720 is a discharge solenoid valve, but it can also be other valves with controllable functions, which are not limited here.

[0072] In some implementations, when the processing center 800 in the detection system receives a detection task, it sends both an opening command to the shut-off valve 10 and a discharge command to the discharge control valve 720. Consequently, the discharge control valve 720 opens the valve flowing into the discharge port 710 and closes the valve flowing into the metering vessel 100, ensuring that the slurry to be tested flowing from the buffer tank 600 to the slurry delivery pipeline 700 is first discharged through the discharge port 710, rather than flowing directly into the metering vessel 100.

[0073] It should be noted that after the detection system receives the detection task, it can control the discharge control valve 720 to open the discharge port 710 for a preset number of seconds, and then control the discharge control valve 720 to open in the direction of inflow into the metering pot 100, thereby stabilizing the flow rate of the slurry to be tested in the slurry conveying pipeline 700.

[0074] It is understood that in this application, by designing the discharge port 710 and the discharge control valve 720, the flow rate of the slurry to be tested flowing into the metering pot 100 can be stabilized, thereby reducing the foam generated by the slurry to be tested during the filling of the metering pot 100, and balancing the pressure of the slurry to be tested stored in the metering pot 100, thereby improving the detection accuracy of the solid content of the slurry to be tested.

[0075] See also Figure 1 The detection system of this application also includes a level gauge 200, a weighing gauge 300, and a processing center 800.

[0076] The level gauge 200 is located on the upper side of the metering vessel 100 and is used to measure the height of the slurry to be measured stored in the metering vessel 100.

[0077] In some embodiments, the level gauge 200 can be positioned directly above the liquid inlet 111 opened on the upper end face of the first metering container 110.

[0078] In some embodiments, a laser level gauge can be used as the level gauge 200, or other devices with height measurement functions can be used as the level gauge 200. In particular, this application does not limit the specifics.

[0079] In some implementations, when the processing center 800 receives a detection task, it generates a height measurement command and sends it to the level gauge 200, so that the level gauge 200 begins to measure the height data of the slurry to be tested stored in the metering vessel 100 in real time.

[0080] In some embodiments, when the processing center 800 issues a dispensing command to the injection pump 500 for a preset time, the processing center 800 issues a height measurement command to the level gauge 200, thereby the level gauge 200 begins measuring the height of the slurry to be tested in the metering vessel 100. It can be understood that, in this embodiment, the height of the slurry to be tested stored in the metering vessel 100 can be measured only after the liquid level has stopped changing.

[0081] See also Figure 1 The weighing meter 300 is located below the measuring vessel 100 and is used to measure the weight of the slurry to be tested stored in the measuring vessel 100.

[0082] In some embodiments, the weighing meter 300 may be a weight sensor. It is positioned below and in contact with the second measuring container 120, thereby enabling it to measure the weight of the slurry to be tested within the measuring vessel 100.

[0083] In some implementations, when the processing center 800 receives a detection task, it generates a weight measurement command and sends it to the weighing meter 300, so that the weighing meter 300 begins to measure the weight of the slurry to be tested in the measuring vessel 100 in real time.

[0084] In some embodiments, when the processing center 800 issues a dispensing command to the injection pump 500 for a preset time, the processing center 800 issues a weight measurement command to the weighing meter 300, thereby the weighing meter 300 begins to measure the weight of the slurry to be tested in the measuring vessel 100. It can be understood that, in this embodiment, the weight of the slurry to be tested stored in the measuring vessel 100 can be measured only after the liquid level of the slurry to be tested has stopped changing.

[0085] The processing center 800 is used to calculate the solid content of the slurry to be tested based on the attribute data associated with the slurry to be tested, the height data measured by the level gauge 200, and the weight data measured by the weighing gauge 300.

[0086] It should be noted that, in the processing center 800, the specific implementation method for calculating the solid content of the slurry to be tested based on the attribute data, the high-speed data, and the weight data can be found in the implementation method of the following detection method, which will not be repeated here.

[0087] See also Figure 1 In some embodiments, the detection system of this application further includes a splash guard 20, a drain pipe 30, and a cleaning port 40.

[0088] The splash guard 20 is positioned above the metering vessel 100 to prevent the slurry to be tested from splashing into the metering vessel 100. It is understood that if the outlet of the slurry conveying pipe 700 and the inlet 111 of the first metering container 110 are fixedly connected and compatible, the splash guard 20 is not required; however, if the cross-sectional area of ​​the outlet of the slurry conveying pipe 700 is smaller than the area of ​​the inlet of the first metering vessel 100, then the splash guard 20 is necessary.

[0089] like Figure 1 As shown, the lower edge of the splash guard 20 can be designed to be close to the edge of the upper end face of the first metering container 110, thereby preventing the test slurry flowing into the metering pot 100 from splashing out and improving the safety of the testing process.

[0090] The drain pipe 30 is connected to the outlet 121 of the second metering container 120 and is used to discharge the slurry to be tested stored in the metering pot 100.

[0091] It is understandable that the outlet 121 of the second metering container 120 can be as follows: Figure 1As shown, it is opened on the side near the lower end face of the second metering container 120, so as to facilitate the drainage of the slurry to be tested in the metering pot 100.

[0092] In some embodiments, a drain valve can be installed at the inlet of the drain pipe 30. After the processing center 800 detects that the solid content detection task of the slurry to be tested has been completed, it will issue a discharge command to the drain valve, so that the slurry to be tested stored in the metering vessel 100 will be discharged to the ditch through the drain pipe 30.

[0093] The cleaning port 40 is used to provide cleaning fluid to the detection system after the slurry to be tested stored in the metering vessel 100 is discharged, so as to clean the various devices in the detection system.

[0094] In some implementations, it can be as follows Figure 2 As shown, the cleaning port 40 is set on the slurry conveying pipe 700 and located below the buffer tank 600. After receiving the cleaning command issued by the processing center 800, it provides cleaning fluid to the slurry conveying pipe 700, the discharge port 710, the first metering container 110, the second metering container 120, etc., thereby removing the alkaline solution, solid residue, slurry scale, etc. remaining in each device.

[0095] In some embodiments, the cleaning port 40 may also be located on the top of the buffer box 600. Specifically, this application does not limit the specific location of the cleaning port 40.

[0096] In some embodiments, the cleaning solution may be water or a low-concentration acidic solution; the specific method is not limited herein.

[0097] According to a second aspect of the embodiments of this application, a method for detecting the solid content of slurry is provided. This method can be executed in the processing center 800 of the detection system provided in the first aspect described above.

[0098] See Figure 2, which shows a schematic flowchart of a slurry solids content detection method according to an embodiment of this application, specifically including S110 to S120.

[0099] S110, acquire attribute data associated with the slurry to be tested, including the height data measured by the level gauge and the weight data measured by the weighing gauge.

[0100] In some implementations, the attribute data includes the solid density and alkaline solution density of the slurry to be tested.

[0101] For example, if measuring the solid content of the slurry in the alumina production process, the alumina production process may use bauxite slurry, red mud slurry, or aluminum hydroxide slurry. Therefore, the solid density could be the solid ore density of the bauxite slurry, the solid ore density of the red mud slurry, or the solid ore density of the aluminum hydroxide slurry. In the alumina production process, the commonly used alkaline solution is a mixture of sodium hydroxide and lithium hydroxide; therefore, the density of this mixture can be used as the density of the alkaline solution.

[0102] It should be noted that the height data represents the data corresponding to the point when the height of the slurry to be tested stored in the metering vessel 100 no longer changes. If the level gauge 200 is used to measure the height of the slurry to be tested in the metering vessel 100 in real time, then the height data is the maximum value among all the data measured by the level gauge 200.

[0103] It should also be noted that the weight data represents the data corresponding to the condition that the weight of the slurry to be tested stored in the measuring vessel 100 no longer changes. If the weighing meter 300 measures the weight of the slurry to be tested in the measuring vessel 100 in real time, then the weight data is the maximum value among all the data measured by the weighing meter 300.

[0104] See also Figure 3 S120, calculate the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data.

[0105] In some implementations, the calculation of the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data can be performed according to, for example... Figure 3 The steps shown are executed, specifically including S121 to S123.

[0106] S121, obtain the volume and weight of defoaming liquid consumed in the process of detecting the solid content of the slurry to be tested.

[0107] For example, if the defoaming liquid is water and the preset volume of water used is 50ml, then the volume consumed is 50ml and the weight consumed is 50g.

[0108] See also Figure 3 S122, the slurry density of the slurry to be tested is determined based on the consumed volume, the consumed weight, the height data, and the weight data.

[0109] In some embodiments, the specific implementation of determining the slurry density of the slurry to be tested based on the consumed volume, the consumed weight, the height data, and the weight data can be performed according to S1221 to S1224 below.

[0110] S1221, Obtain the container volume and container height of the second measuring container, and the bottom area of ​​the first measuring container.

[0111] S1222, Based on the height data, the container volume, the container height, the bottom area, and the consumed volume, determine the volume of the slurry to be tested stored in the metering vessel.

[0112] Specifically, the slurry volume can be calculated using the following formula 1.

[0113]

[0114] Where V is the volume of the slurry to be measured in the metering vessel, and S1 is the bottom area of ​​the first metering container; L e L1 is the height measured by the level gauge; L2 is the height of the second metering container; V2 is the volume of the second metering container; V t This represents the volume of defoaming liquid consumed. This is understandable, as the final liquid level of the slurry being tested is located within the second metering container; therefore, L... e Greater than L2.

[0115] S1223, Based on the weight data and the consumed weight, determine the weight of the slurry to be tested stored in the metering vessel.

[0116] Specifically, the slurry weight can be calculated using the following formula 2.

[0117] M = M e -M t Formula 2

[0118] Where M is the weight of the slurry to be measured in the measuring vessel; M e The weight measured by the weighing instrument; M t This represents the weight of the defoaming solution consumed.

[0119] S1224, Calculate the slurry density of the slurry to be tested based on the slurry volume and the slurry weight.

[0120] In this embodiment, the slurry density can be calculated according to the following formula 3.

[0121]

[0122] Among them, P T M represents the density of the slurry to be tested. e The weight measured by the weighing instrument; M t S1 is the weight of the defoaming liquid consumed; S1 is the bottom area of ​​the first metering container; L eL1 is the height measured by the level gauge; L2 is the height of the second metering container; V2 is the volume of the second metering container; V t This represents the volume of defoaming solution consumed.

[0123] See also ​ S123, calculate the solid content of the slurry to be tested based on the slurry density, the solid density, and the alkaline solution density.

[0124] Specifically, the solid content of the slurry to be tested can be calculated according to the following formula 4.

[0125]

[0126] Where T is the solid content of the slurry to be tested; P s P represents the solid density in the attribute data. L P represents the density of the alkaline solution in the attribute data. T The density of the slurry to be tested is denoted as ρ.

[0127] To enable those skilled in the art to better understand the technical effects of the technical solution presented in this application, the following six embodiments and experimental data will be used to provide a detailed description of the application of the slurry solid content detection system and method to the alumina production process.

[0128] Example 1:

[0129] One liter of bauxite slurry from an alumina plant was taken. The density of the solid ore in the slurry was 2.40 g / cm³. 3 The density of the circulating alkaline solution is 1.36 g / cm³. 3 A large-diameter beaker was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. No fixed volume of water was added as defoaming agent during the experiment. The final solid content of the slurry was 205 g / L, while the solid content of the same slurry measured by the traditional gravimetric method was 285 g / L, with a relative error of -39.02%.

[0130] Example 2:

[0131] One liter of bauxite slurry from an alumina plant was taken. The density of the solid ore in the slurry was 2.4 g / cm³. 3 The density of the circulating alkaline solution is 1.36 g / cm³. 3 A large-diameter beaker was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. During the experiment, 50 mL of a fixed volume of water was added as a defoaming solution. The final solid content of the slurry was 257 g / L, while the solid content of the same slurry measured by the traditional gravimetric method was 285 g / L, with a relative error of -10.89%.

[0132] Example 3:

[0133] One liter of bauxite slurry from an alumina plant was taken. The density of the solid ore in the slurry was 2.4 g / cm³. 3 The density of the circulating alkaline solution is 1.36 g / cm³. 3 A small-diameter graduated cylinder was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. No fixed volume of water was added as defoaming agent during the experiment. The final solid content of the slurry was 311 g / L, while the solid content of the same material measured by the traditional gravimetric method was 285 g / L, with a relative error of 9.12%.

[0134] Example 4:

[0135] One liter of bauxite slurry from an alumina plant was taken. The density of the solid ore in the slurry was 2.4 g / cm³. 3 The density of the circulating alkaline solution is 1.36 g / cm³. 3 A small-diameter graduated cylinder was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. During the experiment, 50 mL of a fixed volume of water was added as a defoaming agent. The final solid content of the slurry was 298 g / L, while the solid content of the same material measured by the traditional gravimetric method was 285 g / L, with a relative error of 4.56%.

[0136] Example 5:

[0137] One liter of red mud slurry from an alumina plant was taken. The density of the solid red mud in the slurry was 2.75 g / cm³. 3 The density of the red mud alkali solution is 1.05 g / cm³. 3 A small-diameter graduated cylinder was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. During the experiment, 50 mL of a fixed volume of water was added as a defoaming agent. The final solid content of the slurry was 655 g / L, while the solid content of the same material measured by the traditional gravimetric method was 639 g / L, with a relative error of 2.50%.

[0138] Example 6

[0139] One liter of aluminum hydroxide slurry from an alumina company was taken. The density of the solid aluminum hydroxide in the slurry was 2.42 g / cm³. 3 The density of the alkaline solution is 1.31 g / cm³. 3 A small-diameter graduated cylinder was used as a measuring vessel, and an electronic balance and a laser level gauge were used to detect the solid content. During the experiment, 50 mL of a fixed volume of water was added as a defoaming agent. The final solid content of the slurry was 765 g / L, while the solid content of the same material measured by the traditional gravimetric method was 751 g / L, with a relative error of 1.86%.

[0140] As can be seen from the above six embodiments, if the second metering container 120 with a small cross-sectional area designed in this application is used, and the defoaming liquid is sprayed into the slurry to be tested using the injection pump 500, the relative error of the solid content of the final slurry to be tested compared with the solid content measured by the traditional gravimetric method can be less than 5%. Therefore, the technical solution of this application can greatly improve the detection accuracy of the solid content of the slurry and can realize online detection in the production process, greatly improving safety.

[0141] In some embodiments of this application, a slurry solids content detection system is provided. This system mainly includes a metering vessel 100 for storing the slurry to be tested; a level gauge 200 for measuring the height of the slurry stored in the metering vessel 100; a weighing gauge 300 for measuring the weight of the slurry stored in the metering vessel; and a processing center 800 for calculating the solids content of the slurry. In this detection system, the metering vessel 100 is designed as a container with a special structure, including a first metering container 110 and a second metering container 120. The cross-section of the first metering container 110 is designed to be smaller than the cross-section of the second metering container 120. This makes the measurement of the height of the slurry stored in the metering vessel by the level gauge 200 more accurate, resulting in a more accurate volume of the slurry and ultimately a more accurate calculated solids content, thus improving the detection accuracy of the slurry solids content. In addition, by designing an injection pump 500 in the detection system of this application, foam in the slurry to be tested stored in the metering vessel 100 can be eliminated, thereby improving the detection accuracy of the solid content of the slurry.

[0142] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A slurry solids content detection system, characterized in that, The system includes: A metering vessel is used to store the slurry to be tested. It includes a first metering container and a second metering container. The first metering container has an inlet on its upper end face and an outlet on its lower end face that is connected to the inlet on the upper end face of the second metering container. The cross-sectional area of ​​the first metering container is smaller than that of the second metering container. A level gauge, located on the upper side of the metering vessel, is used to measure the height of the slurry to be measured stored in the metering vessel; A weighing meter, located on the lower side of the measuring vessel, is used to measure the weight of the slurry to be tested stored in the measuring vessel; The processing center is used to calculate the solid content of the slurry to be tested based on the attribute data associated with the slurry to be tested, the height data measured by the level gauge, and the weight data measured by the weighing gauge. A level gauge is installed on the second metering container to monitor the level of the slurry to be tested flowing into the second metering container. When the level of the slurry to be tested rises to a set position, an alarm signal is generated. The shut-off valve is used to stop feeding the slurry to be tested into the metering pot when a shut-off command is received based on the reminder signal. An injection pump, connected to the metering vessel, is used to provide a preset volume of defoaming liquid to the metering vessel when a dispensing instruction is received based on the reminder signal, in order to eliminate foam in the slurry to be tested.

2. The system according to claim 1, characterized in that, The system also includes: The buffer tank has an inlet at the top, and the outlet of the buffer tank is connected to the inlet of the first metering container through a slurry conveying pipe to reduce the feeding pressure of the slurry to be tested.

3. The system according to claim 2, characterized in that, The system also includes: A discharge port is provided on the slurry conveying pipeline to discharge the slurry to be tested before conveying it to the metering vessel, so as to stabilize the flow rate of the slurry to be tested in the slurry conveying pipeline.

4. The system according to claim 3, characterized in that, The system also includes: A discharge control valve is installed at the discharge port to stop supplying the slurry to be tested to the discharge port and start supplying the slurry to be tested to the metering vessel after the flow rate of the slurry to be tested in the slurry conveying pipeline has stabilized. A splash guard is installed above the metering vessel to prevent the slurry to be tested from splashing into the metering vessel.

5. The system according to claim 1, characterized in that, The system also includes: The drain pipe is connected to the outlet of the second metering container and is used to discharge the slurry to be tested stored in the metering vessel. A cleaning port is used to provide cleaning fluid to the detection system after the slurry to be tested stored in the metering vessel is discharged, so as to clean the various devices in the detection system.

6. A method for detecting the solid content of a slurry, characterized in that, The method is performed at the processing center of the detection system as described in any one of claims 1 to 5, and the method includes: Acquire attribute data associated with the slurry to be tested, including the height data measured by the level gauge and the weight data measured by the weighing gauge; The solid content of the slurry to be tested is calculated based on the attribute data, the height data, and the weight data.

7. The method according to claim 6, characterized in that, The attribute data includes the solid density and alkaline solution density of the slurry to be tested. The calculation of the solid content of the slurry to be tested based on the attribute data, the height data, and the weight data includes: Obtain the volume and weight of defoaming solution consumed during the detection of the solid content of the slurry to be tested; The slurry density of the slurry to be tested is determined based on the consumed volume, the consumed weight, the height data, and the weight data. The solid content of the slurry to be tested is calculated based on the slurry density, the solid density, and the alkaline solution density.

8. The method according to claim 7, characterized in that, Determining the slurry density based on the consumed volume, the consumed weight, the height data, and the weight data includes: Obtain the container volume and container height of the second measuring container, and the bottom area of ​​the first measuring container; Based on the height data, the container volume, the container height, the bottom area, and the consumed volume, the volume of the slurry to be tested stored in the metering vessel is determined. The weight of the slurry to be tested stored in the metering vessel is determined based on the weight data and the consumed weight. The slurry density is calculated based on the slurry volume and the slurry weight.

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