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Method for measuring water content in a compound and water content measuring device

A measurement method and technology of raw materials, applied in the direction of material analysis, measurement device, analysis material, etc. by optical means, can solve the problems of inability to obtain moisture changes, difficult correction, and inability to measure moisture, and achieve accurate and rapid determination of moisture content. Effect

Active Publication Date: 2013-03-13
NIPPON STEEL CORP
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Problems solved by technology

Therefore, as in the invention described in Patent Document 2, it can be seen that if the offset adjustment is performed on the premise that only the constant b fluctuates, accurate moisture measurement cannot be performed.
In addition, as described in Patent Document 3, even if a linear regression is performed by performing a predetermined number of on-line dry mass method measurements, since the moisture content of the sintered raw material does not change so much in a short period of time, it is not possible to obtain sufficient and accurate results. The linear regression formula for the change in moisture
In addition, it takes time to perform dry mass method measurements for a predetermined number of times, so it is difficult to quickly correct

Method used

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  • Method for measuring water content in a compound and water content measuring device
  • Method for measuring water content in a compound and water content measuring device
  • Method for measuring water content in a compound and water content measuring device

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Embodiment Construction

[0059] In the measurement of the water content w of the blended raw material (sintered raw material) using infrared absorption by water, the relationship between k and w (calibration curve) when the raw material is blended is changed as described above, and the constants in the above formula (4) a and b change together. Therefore, in order to obtain the correct constants a and b after changing the raw material blend, it is necessary to collect two or more samples of blended raw materials with different moisture content, and measure the water content w of each sample. C and absorbance k C . In this way, two or more measured values ​​of different water content can be obtained, and therefore accurate constants a and b after changing the raw material composition can be obtained.

[0060] Here, if b does not change even if a changes in the formula (4) when the raw material mix is ​​changed, the constant to be corrected is only the constant a. Therefore, the absorbance k measured...

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Abstract

Provided is a method for measuring a water content in a compound using a 3-wavelength type infrared water content tester, in which the method uses a reference wavelength combination of a long-wavelength-side reference wavelength "» L " longer than a wavelength "» W " absorbed by water and a short-wavelength-side reference wavelength "» S " shorter than the wavelength "» W " such that the reference wavelength combination makes b in an expression k = aw + b, which is a relational expression between a water content w and an absorbance k of the compound, be regarded as zero within an allowable measurement error of the infrared water content tester, regardless of a mixture proportion of the pre-mixing raw materials.

Description

technical field [0001] The present invention relates to a moisture measuring method and a moisture measuring device for blended raw materials. In particular, the present invention relates to a technique for measuring moisture in sintered raw materials obtained by blending a plurality of raw materials before blending by utilizing infrared absorption by water. [0002] This application is based on and claims priority to Japanese Patent Application No. 2008-176786 filed on July 7, 2008, and the content thereof is incorporated herein. Background technique [0003] When producing sintered ore, sintered ore is formed by sintering in a sintering machine the sintered raw material obtained by blending two or more types of iron ore as a raw material and auxiliary materials such as coke powder or limestone as a fuel. Here, the iron ore and auxiliary raw materials before blending are called raw materials before blending, and the raw materials after blending are called blending raw mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35C22B1/16G01N21/27G01N21/3554
CPCG01N2021/3174C22B1/205C22B1/16G01N21/3554G01N21/314G01N21/35G01N21/27
Inventor 杉浦雅人矢野正树松本俊司国永学
Owner NIPPON STEEL CORP
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