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Method and device for conducting absolute measurement on electrical conductivity of solution and high-temperature melt

A high-temperature melt, absolute measurement technology, applied in the direction of fluid resistance measurement, etc., can solve the problems of conductivity cell expansion and deformation, the geometric size of the conductivity cell is difficult to directly measure, etc., to eliminate polarization effects and edge effects, and the device and method are simple and easy line effect

Active Publication Date: 2013-10-09
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The measurement of the conductivity of high-temperature melts has not been reported using the absolute measurement method. One of the main reasons is that the conductivity cell expands and deforms at high temperatures, and the geometric dimensions of the conductivity cell are difficult to measure directly at high temperatures; When conducting high-temperature molten salt conductivity, in order to obtain the conductivity cell constant after high-temperature expansion and deformation of the conductivity cell, it is necessary to select a suitable standard material to calibrate the conductivity cell constant near the test temperature; use the traditional "four-electrode method" to measure the conductivity of the high-temperature melt When, it is also necessary to use standard materials to calibrate the conductivity cell constant near the test temperature

Method used

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  • Method and device for conducting absolute measurement on electrical conductivity of solution and high-temperature melt
  • Method and device for conducting absolute measurement on electrical conductivity of solution and high-temperature melt
  • Method and device for conducting absolute measurement on electrical conductivity of solution and high-temperature melt

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Embodiment 1

[0049] The structure of the absolute measurement device for the conductivity of solutions and high-temperature melts is as follows: figure 1 As shown, it is a single capillary conductivity cell device, including a first electrode 2, a second electrode 3, a first capillary 10, a capillary clamping device, an LCR tester 1, an electrode fixture 4 and a servo system 6, and the first capillary 10 is fixed on On the capillary clamping device, the first capillary 10 is perpendicular to the horizontal plane, the first electrode 2 and the second electrode 3 are connected to the connecting terminal of the measurement port of the LCR tester 1 through wires, the first electrode 1 is fixed on the electrode holder 4, and the electrode The fixture 4 is fixed on the electrode fixture bracket 5, and the electrode fixture bracket 5 is assembled with the servo system 6, and the servo system 6 is fixed on the capillary tube clamping device, wherein the first electrode 2 is inserted into the first ...

Embodiment 2

[0070] The structure of the absolute measurement device for the conductivity of solutions and high-temperature melts is as follows: figure 2 As shown, the structure is a double capillary conductivity cell device, including a first electrode 2, a second electrode 3, a first capillary 10, a second capillary 17, a capillary clamping device, an LCR tester 1, an electrode fixture 4 and a servo system 6 , the first capillary 10 and the second capillary 17 are fixed side by side on the capillary clamping device, the first capillary 10 and the second capillary 17 are perpendicular to the horizontal plane, the first electrode 2 and the second electrode 3 are measured by the wire and the LCR tester 1 The terminal connection of the port is connected, and the first electrode 2 and the second electrode 3 are fixed side by side on the electrode fixture 4, and the electrode fixture 4 is fixed on the electrode fixture bracket 5, and the electrode fixture bracket 5 is assembled with the servo ...

Embodiment 3

[0091] The structure of the absolute measurement device for the conductivity of solutions and high-temperature melts is as follows: figure 2 Shown, double capillary conductance cell device structure is the same as embodiment 2;

[0092] Use the above-mentioned device to measure the conductivity of the electrolyte melt in the aluminum electrolytic cell of a factory, measure the inner diameters of the first capillary and the second capillary in advance at 945°C, and immerse the double-tube conductivity cell of the above-mentioned device into the aluminum electrolytic cell. Be in the electrolyte melt of 945 ℃, other methods are with embodiment 2; Record the conductivity of electrolyte melt to be 2.24 ; Since there is no example of on-line measurement of the conductivity of the electrolyte melt in the aluminum electrolytic cell at present, the electrolyte sample in the electrolytic cell is taken out, and then measured under laboratory conditions, the measurement result is 2.21 ...

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Abstract

The invention provides a method and device for conducting absolute measurement on electrical conductivity of solution and a high-temperature melt. The method includes the steps that (1) capillary tubes are fixed in the solution or the high-temperature melt to be measured, electrodes are connected with an LCR tester, and one or two electrodes are fixed on an electrode clamp and inserted in the capillary tubes; (2) resistance R1 is measured by the LCR tester; (3) the electrodes are controlled to move along the preset distance l, and then resistance R2 is measured; (4) the inner diameter of each of the capillary tube is measured; (5) the constant of a conductance cell is calculated; (6) the difference value of the resistance at two measuring positions is calculated; (7) the electrical conductivity is calculated. The device is divided into a single capillary tube conductance cell device and a double capillary tube conductance cell device and comprises the two electrodes, the capillary tubes, a capillary tube clamping device, the LCR tester, the electrode clamp and a servo system. According to the method and device for conducting absolute measurement on electrical conductivity of the solution and the high-temperature melt, the polarization effect and the fringe effect can be effectively eliminated, and the high-precision measuring result of the electrical conductivity of the solution or the high-temperature melt is acquired.

Description

technical field [0001] The invention relates to a solution and high-temperature melt conductivity measurement technology, in particular to an absolute measurement method and device for the solution and high-temperature melt conductivity. Background technique [0002] The measurement of the conductivity of solutions and high-temperature melts can be divided into "relative measurement method" and "absolute measurement method": the method of directly measuring the geometric size of the conductivity cell and then obtaining the conductivity cell constant is called the absolute measurement method; using the precisely measured conductivity A certain solution or high-temperature melt is used as a standard melt, and the indirect calculation (or calibration, correction) of the conductivity cell constant is called the relative measurement method. [0003] The absolute measurement method can completely eliminate the influence of electrode polarization and edge effects, and because it is...

Claims

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Application Information

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IPC IPC(8): G01R27/22
Inventor 张晓明
Owner NORTHEASTERN UNIV
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