JPH04348271A - Method and apparatus for detecting content of specific substance in granular matter - Google Patents
Method and apparatus for detecting content of specific substance in granular matterInfo
- Publication number
- JPH04348271A JPH04348271A JP34101990A JP34101990A JPH04348271A JP H04348271 A JPH04348271 A JP H04348271A JP 34101990 A JP34101990 A JP 34101990A JP 34101990 A JP34101990 A JP 34101990A JP H04348271 A JPH04348271 A JP H04348271A
- Authority
- JP
- Japan
- Prior art keywords
- content
- specific substance
- magnetic field
- container
- induced current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000126 substance Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 7
- 239000002893 slag Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims description 18
- 239000008187 granular material Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 230000005684 electric field Effects 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 15
- 238000004458 analytical method Methods 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 238000001514 detection method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010811 mineral waste Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、原料鉱石の利用鉱石、鉱物廃棄物中の有価物
質、金属溶解滓中の特定金属等、粉粒状物質中の特定物
質含有量の検知技術に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to the utilization of raw material ores, valuable substances in mineral waste, specific metals in metal slag, etc., and the content of specific substances in particulate materials. Regarding detection technology.
例えば、アルミニウム製品の再利用のための溶解過程で
発生するスラグは、冷却後、粉砕分級処理して鉄鋼の連
続鋳造に際しての溶鋼被覆材に用いられたり、あるいは
、溶湯中の酸素除去及びスラグ分離剤等に用いられ強い
需要がある。この需要に対応するためには、生成するス
ラグ中に含有される金属アルミニウムの量や粒度に応じ
て分類する必要がある。For example, slag generated during the melting process for reusing aluminum products is cooled and then crushed and classified to be used as coating material for molten steel during continuous casting of steel, or to remove oxygen from molten metal and separate slag. There is a strong demand for it as it is used as a medicine. In order to meet this demand, it is necessary to classify the produced slag according to the amount and particle size of metallic aluminum contained in the slag.
従来、アルミニウム溶解時に発生するスラグ中の金属ア
ルミニウム含有量は冷却粉砕分級後の粉末をサンプリン
グし、この試料を化学分析して測定していた。Conventionally, the metallic aluminum content in slag generated during aluminum melting has been measured by sampling powder after cooling, crushing and classification, and chemically analyzing this sample.
しかし、この測定法は試料を塩酸と化学反応せしめて発
生する水素量を測定するものであり、分析に時間を要す
るものであるので、分級作業後の工程が一旦停止するこ
とになり迅速性に劣り、全体の処理効率が低下するばか
りではなく、自動記録ができにくく管理に手間を要する
という欠点がある。However, this measurement method involves chemically reacting the sample with hydrochloric acid to measure the amount of hydrogen generated, and the analysis takes time, so the process after classification has to be temporarily stopped, which impedes speed. This method not only reduces overall processing efficiency, but also has the disadvantage that automatic recording is difficult and management is time-consuming.
また、化学分析による検知は対象試料が少量であるため
に、等級分類された品物の平均分析値との間にずれを生
じるという問題がある。Furthermore, since detection by chemical analysis involves a small amount of target sample, there is a problem in that a deviation occurs between the average analysis value of the classified items and the detection value.
本発明は、粉粒混合物中から特定物質の含有量の検知を
化学分析に代わってより簡単に且つ正確に検知する手段
を見出すことにある。The object of the present invention is to find a means to more easily and accurately detect the content of a specific substance in a powder mixture in place of chemical analysis.
本発明は、粉粒状物中に高周波磁界を付与せしめ、この
付与された高周波磁界によって誘起する電流値を、予め
測定された粒状物中の特定物質の含有率と高周波磁界に
よって発生する誘導電流との相関関係とを照合し、この
照合によって粒状物中の特定物質の含有量を検知するも
のである。The present invention applies a high-frequency magnetic field to a powder or granular material, and compares the current value induced by the applied high-frequency magnetic field with the content of a specific substance in the granular material measured in advance and the induced current generated by the high-frequency magnetic field. The content of the specific substance in the granular material is detected through this comparison.
この検知は、特定物質を含む粉粒を一定量収容する容器
壁に高周波発信コイルを取り付け、同高周波発信コイル
からの誘導電流の信号を測定する計測器とを接続使用す
ることにより実施できる。This detection can be carried out by attaching a high-frequency transmitting coil to the wall of a container containing a certain amount of powder particles containing a specific substance, and connecting it to a measuring device that measures the induced current signal from the high-frequency transmitting coil.
粉粒体に高周波磁界を付加することによって粉粒体に電
流が誘起され、この誘起電流の値は粉粒体を構成する物
質によって異なり、そして、この誘起電流の絶対値は粉
粒混合物中の特定物質の含有量に比例する。この誘起電
流の絶対値と、予め化学分析等の手段で得た標準試料の
含有量との相関関係を把握しておけば、付与した高周波
磁界によって発生した誘起電流値から特定物質の含有量
を知ることが可能となる。A current is induced in the powder by applying a high-frequency magnetic field to the powder, and the value of this induced current varies depending on the material that makes up the powder, and the absolute value of this induced current varies depending on the material in the powder mixture. Proportional to the content of specific substances. If you understand the correlation between the absolute value of this induced current and the content of a standard sample obtained in advance by means such as chemical analysis, you can determine the content of a specific substance from the induced current value generated by the applied high-frequency magnetic field. It becomes possible to know.
電磁誘導試験の場合、測定粒子相互の接触面積が少なく
なれば含有量の値も変化する。In the case of electromagnetic induction testing, the content value changes as the contact area between the particles to be measured decreases.
測定対象となる粉粒体の粒度が大きくなると誘起される
電流が測定すべき粉粒体中を流れづらくなるため、粉粒
体を構成する粒は最大０．７ｍｍ程度である必要がある
。If the particle size of the powder or granule to be measured becomes large, it becomes difficult for the induced current to flow through the powder or granule to be measured, so the grains constituting the powder or granule must have a maximum size of about 0.7 mm.
また、付与すべき高周波の周波数は、測定物質にもよる
が、一般に周波数が低い場合には誘起電流の絶対値が低
くなって測定が困難となり、また高すぎると発熱して部
分溶解をもたらす場合があり、正確な誘導電流の測定が
困難となるので、通常０．５〜１０ＭＨｚの高周波磁界
の付与が都合がよい。The frequency of the high frequency to be applied depends on the substance to be measured, but in general, if the frequency is low, the absolute value of the induced current will be low, making measurement difficult, and if it is too high, it may generate heat and cause partial dissolution. This makes it difficult to accurately measure the induced current, so it is usually convenient to apply a high frequency magnetic field of 0.5 to 10 MHz.
本発明は、金属を溶解した際に発生する滓、高炉滓や硫
酸滓等、如何なる粉粒体中の特定物質の含有量の検知に
も適用できる。The present invention can be applied to detecting the content of a specific substance in any powder or granular material, such as slag generated when melting metal, blast furnace slag, or sulfuric acid slag.
以下に、アルミニウムの溶解において発生するスラグ中
の金属アルミニウム含有量の検知に本発明を適用した例
を具体的に示す。Below, a specific example will be shown in which the present invention is applied to detecting the metallic aluminum content in slag generated during aluminum melting.
第１図はこの実施例において使用した装置の概要を示す
。FIG. 1 shows an outline of the apparatus used in this example.
同図において、図示しない溶解炉から製出した冷却滓を
投入ホッパー１に投入し、一時貯蔵したのち、コンベア
とバケットコンベアとからからなる搬送機２から粉砕機
３に装入する。この粉砕機３によって最大０．７ｍｍ径
に粉砕した粉粒物は搬送機４によって上端にトロンメル
５を設けたホッパー６を通過し容器７に一旦収納した後
、測定容器８に移す。この測定容器８には高周波コイル
９がセットされており、０．５〜１０ＭＨｚの高周波磁
界が付与され、これによる誘起電流を計測器１０にイン
プットして、予め測定した誘起電流と特定物質の含有量
との関連を化学分析値と照合して作成した比較標準値と
照合して含有量を検知する。In the figure, cooling slag produced from a melting furnace (not shown) is charged into an input hopper 1, temporarily stored, and then charged into a crusher 3 from a conveyor 2 consisting of a conveyor and a bucket conveyor. The powder and granules crushed to a maximum diameter of 0.7 mm by the crusher 3 are passed through a hopper 6 having a trommel 5 at the upper end by a conveyor 4, stored once in a container 7, and then transferred to a measuring container 8. A high-frequency coil 9 is set in this measurement container 8, and a high-frequency magnetic field of 0.5 to 10 MHz is applied.The induced current is input to the measuring device 10, and the pre-measured induced current and the specific substance content are input. The content is detected by comparing the relationship with the chemical analysis value and comparing it with the comparison standard value created.
第２図は、最大粒度０．７ｍｍのアルミニウム溶解滓中
のアルミニウム含有量（横軸）と周波数１ＭＨｚの高周
波磁界を付与したときの誘導電流値（縦軸）との相関関
係を示す図である。同図において、横軸に示すアルミニ
ウム含有量を化学分析によって知り得たアルミニウム溶
解滓のテストサンプルを複数調製し、これに周波数１Ｍ
Ｈｚの高周波磁界を付与したときの誘導電流値を相対値
として示したものである。Figure 2 is a diagram showing the correlation between the aluminum content (horizontal axis) in aluminum slag with a maximum particle size of 0.7 mm and the induced current value (vertical axis) when a high-frequency magnetic field with a frequency of 1 MHz is applied. . In the same figure, we prepared multiple test samples of aluminum slag whose aluminum content, shown on the horizontal axis, was known through chemical analysis, and applied a frequency of 1M to the test samples.
The induced current value when a high frequency magnetic field of Hz is applied is shown as a relative value.
この関連を上記計測器１０にインプットすることによっ
て、直接検知した誘起電流値を計測器１０内で照合せし
め、これによって測定容器８中に収納されたアルミニウ
ム滓中の金属アルミニウムの含有量を即座に検知できた
。その測定誤差は±０．１以内であった。By inputting this relationship into the measuring instrument 10, the directly detected induced current value can be compared within the measuring instrument 10, and thereby the content of metallic aluminum in the aluminum slag stored in the measuring container 8 can be immediately determined. I was able to detect it. The measurement error was within ±0.1.
本発明によって以下の効果を奏することができる。 The following effects can be achieved by the present invention.
（１）特定物質を含む粉砕粒の化学的分析は少量分析の
ため、試料分析採取を頻繁に行う必要があるが、この方
法を用いると１〜２回の分析でロット全体の分析が可能
となる。(1) Chemical analysis of pulverized grains containing specific substances requires frequent analysis and collection of samples, but this method makes it possible to analyze the entire lot in one or two analyses. Become.
（２）粉砕粒の化学分析は１サンプル分析に要する時間
が数十分であるが、この方法を用いるとわずか２秒で分
析可能となる。(2) Chemical analysis of crushed grains takes several tens of minutes to analyze one sample, but using this method, analysis can be performed in just 2 seconds.
（３）本発明による方法は粉粒体であれば、対象物質の
如何に拘わらず正確な測定が可能である。(3) The method according to the present invention allows accurate measurement regardless of the target substance as long as it is a powder or granular material.
第１図は本発明の検知方法を実施するために使用する装
置の例を示す。
第２図はアルミニウム溶解滓中のアルミニウム含有量を
検知するために使用したアルミニウム含有量と誘起電流
との相関関係を示す図である。
１：ホッパー ２：搬送機
３：粉砕機 ４：搬送機
５：トロンメル ６：ホッパー
７：容器 ８：測定容器
９：高周波コイル １０：計測器FIG. 1 shows an example of an apparatus used to carry out the detection method of the invention. FIG. 2 is a diagram showing the correlation between the aluminum content and the induced current used to detect the aluminum content in the aluminum slag. 1: Hopper 2: Conveyor 3: Pulverizer 4: Conveyor 5: Trommel 6: Hopper 7: Container 8: Measuring container 9: High frequency coil 10: Measuring instrument
Claims (3)
の付与された高周波磁界によって誘起する電流値を、予
め測定された粒状物中の特定物質の含有率と高周波磁界
によって発生する誘導電流との相関関係とを照合し、こ
の照合によって粒状物中の特定物質の含有量を検知する
方法。Claim 1: A high-frequency magnetic field is applied to a powder or granular material, and the current value induced by the applied high-frequency magnetic field is determined by the content of a specific substance in the granular material measured in advance and the induced current generated by the high-frequency magnetic field. A method for detecting the content of a specific substance in granular materials by comparing the correlation between
０．７ｍｍ径である粉砕金属滓であり、検知すべき特定
物質が金属分である粒状物中の特定物質の含有量を検知
する方法。[Claim 2] In the description of claim 1, the powder and granules are crushed metal slag with a maximum diameter of 0.7 mm, and the specific substance to be detected is a metal component.Detecting the content of a specific substance in the granules. how to.
波発信器と、同高周波発信器からの磁界によって誘起す
る誘導電流の値を計測する計測器とからなる粉粒状物中
の特定物質の含有量を検出する装置。Claim 3: A specific substance in a powder or granular material, comprising a high-frequency transmitter attached to the wall of a container containing the powder or granular material, and a measuring device that measures the value of an induced current induced by the magnetic field from the high-frequency transmitter. A device that detects the content of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2341019A JP2555480B2 (en) | 1990-11-30 | 1990-11-30 | Method and device for detecting content of aluminum metal in ground metal slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2341019A JP2555480B2 (en) | 1990-11-30 | 1990-11-30 | Method and device for detecting content of aluminum metal in ground metal slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04348271A true JPH04348271A (en) | 1992-12-03 |
| JP2555480B2 JP2555480B2 (en) | 1996-11-20 |
Family
ID=18342467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2341019A Expired - Fee Related JP2555480B2 (en) | 1990-11-30 | 1990-11-30 | Method and device for detecting content of aluminum metal in ground metal slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2555480B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52116290A (en) * | 1976-03-02 | 1977-09-29 | Nippon Steel Corp | Quantitative determination method of magnetite and metal iron in granu lar or powdery non-metallic substances |
-
1990
- 1990-11-30 JP JP2341019A patent/JP2555480B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52116290A (en) * | 1976-03-02 | 1977-09-29 | Nippon Steel Corp | Quantitative determination method of magnetite and metal iron in granu lar or powdery non-metallic substances |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2555480B2 (en) | 1996-11-20 |
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