JP2010090419A - Method for diagnosing rubber lining of hydrochloric acid tank - Google Patents

Method for diagnosing rubber lining of hydrochloric acid tank Download PDF

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JP2010090419A
JP2010090419A JP2008259946A JP2008259946A JP2010090419A JP 2010090419 A JP2010090419 A JP 2010090419A JP 2008259946 A JP2008259946 A JP 2008259946A JP 2008259946 A JP2008259946 A JP 2008259946A JP 2010090419 A JP2010090419 A JP 2010090419A
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rubber lining
rubber
hydrochloric acid
acid
lining
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JP5309857B2 (en
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Yukihiko Uchiyama
幸彦 内山
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JFE Steel Corp
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for diagnosing the rubber lining of a hydrochloric acid tank which dispenses with removal of a part of acid resistant bricks and consequently can reduce operation stop time and diagnosis cost. <P>SOLUTION: In a hydrochloric acid tank where the outside of acid resistant bricks 3 is provided with an acid resistant lining 2, and expansion rubber 4 in contact with hydrochloric acid or a hydrochloric acid-containing liquid is interposed between the acid resistant bricks 3, when the rubber lining 2 is diagnosed, a sample extending to the rubber lining 2 or a sample 5 extending to the vicinity of the rubber lining 2 is cut out from the inside part of the tank in the expansion rubber 4, and the deterioration state of the rubber lining 2 is diagnosed in the vicinity of the rubber lining 2 of the cut-out sample 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、酸洗やエッチングに用いられる塩酸槽のゴムライニング診断方法に関するものである。   The present invention relates to a method for diagnosing a rubber lining of a hydrochloric acid tank used for pickling and etching.

鉄鋼の酸洗やエッチングは、内側に耐酸煉瓦が貼り付けられた酸洗槽で行われる。酸洗槽の耐酸煉瓦の外側には、耐酸性のゴムライニングが施されている（例えば、特許文献１参照）。このゴムライニングは耐酸性を有するが、耐酸煉瓦の目地からしみこんだ塩酸によって、どうしても劣化してしまう。従来は、このゴムライニングの劣化状態を診断するために、耐酸煉瓦の一部を除去し、ゴムライニングから直接試料を採取して分析し、例えばゴムの劣化層の厚さから劣化の進行度を診断している。鉄鋼の酸洗やエッチングには、酸洗槽として塩酸槽がよく用いられるが、この場合も同様である。
特開平２−９７６８９号公報 Pickling and etching of steel are performed in a pickling tank with acid-resistant bricks attached to the inside. An acid-resistant rubber lining is applied to the outside of the acid-resistant brick in the pickling tank (see, for example, Patent Document 1). This rubber lining has acid resistance, but is inevitably deteriorated by hydrochloric acid soaked from the joints of acid-resistant bricks. Conventionally, in order to diagnose the deterioration state of the rubber lining, a part of the acid-resistant brick is removed, and a sample is directly collected from the rubber lining and analyzed. I have a diagnosis. For pickling and etching of steel, a hydrochloric acid bath is often used as a pickling bath, and the same applies to this case.
Japanese Patent Laid-Open No. 2-97689

しかしながら、前記塩酸槽のゴムライニング診断方法では、耐酸煉瓦の一部を除去しなければならないので、塩酸槽を長時間停止させたり、ゴムライニング採取のために多大なコストが必要となったりする。
本発明は、上記のような問題点に着目してなされたものであり、耐酸煉瓦の一部を除去する必要がなく、操業停止時間や診断コストを低減することが可能な塩酸槽のゴムライニング診断方法を提供することを目的とするものである。 However, in the method for diagnosing the rubber lining of the hydrochloric acid tank, a part of the acid-resistant brick has to be removed, so that the hydrochloric acid tank is stopped for a long time or a large cost is required for collecting the rubber lining.
The present invention has been made paying attention to the above-mentioned problems, and it is not necessary to remove part of the acid-resistant brick, and the rubber lining of the hydrochloric acid tank that can reduce the operation stop time and the diagnostic cost. The object is to provide a diagnostic method.

上記課題を解決するために、本発明の塩酸槽のゴムライニング診断方法は、耐酸煉瓦の外側に耐酸ゴムライニングを有し、耐酸煉瓦同士の間に、塩酸又は塩酸を含む液体に接触するエキスパンションゴムを介装する塩酸槽のゴムライニング診断方法であって、前記エキスパンションゴムの槽内側部分から、ゴムライニングに及ぶ試料又はゴムライニング近傍に及ぶ試料を切り取り、切り取られた試料のゴムライニング近傍部分でゴムライニングの劣化状態を診断することを特徴とするものである。   In order to solve the above-mentioned problems, the rubber lining diagnosis method for hydrochloric acid tank according to the present invention has an acid-resistant rubber lining on the outside of acid-resistant bricks, and an expansion rubber that contacts hydrochloric acid or a liquid containing hydrochloric acid between the acid-resistant bricks. A method for diagnosing a rubber lining of a hydrochloric acid tank interposing a rubber sample, wherein a sample extending to the rubber lining or a sample extending to the vicinity of the rubber lining is cut out from the inside portion of the expansion rubber tank, and the rubber is removed at the portion near the rubber lining of the cut sample. It is characterized by diagnosing the deterioration state of the lining.

而して、本発明の塩酸槽のゴムライニング診断方法によれば、耐酸煉瓦の外側に耐酸ゴムライニングを有し、耐酸煉瓦同士の間に、塩酸又は塩酸を含む液体に接触するエキスパンションゴムを介装する塩酸槽のゴムライニングを診断するにあたり、エキスパンションゴムの槽内側部分から、ゴムライニングに及ぶ試料又はゴムライニング近傍に及ぶ試料を切り取り、切り取られた試料のゴムライニング近傍部分でゴムライニングの劣化状態を診断する構成としたため、耐酸煉瓦の一部を除去する必要がなく、操業停止時間や診断コストを低減することができる。   Thus, according to the rubber lining diagnosis method for a hydrochloric acid tank of the present invention, an acid-resistant rubber lining is provided on the outside of the acid-resistant brick, and an expansion rubber that contacts hydrochloric acid or a liquid containing hydrochloric acid is interposed between the acid-resistant bricks. When diagnosing the rubber lining of the hydrochloric acid tank, the sample that extends to the rubber lining or the sample that extends to the vicinity of the rubber lining is cut from the inner part of the expansion rubber tank, and the deterioration of the rubber lining in the portion near the rubber lining of the cut sample Therefore, it is not necessary to remove part of the acid-resistant brick, and the operation stop time and diagnosis cost can be reduced.

次に、本発明の塩酸槽のゴムライニング診断方法の一実施形態について図面を参照しながら説明する。
図１は、本実施形態のゴムライニング診断方法が適用される塩酸槽の概略構成図である。この塩酸槽は、図に示すように、断面が方形で、図の前後方向に長手なものである。図中の符号１は、塩酸槽の外枠を構成する鉄皮、符号２は、鉄皮１の内側に張られた耐酸性のゴムライニングである。このゴムライニング２の内側には、凡そ耐酸煉瓦３が積層されているが、塩酸槽の長手方向所定間隔ごとに、エキスパンションゴム４が、耐酸煉瓦３の層同士の間に介装されるようにして設けられている。なお、エキスパンションゴム４も、ゴムライニング２と同様の耐酸性のゴムからなる。 Next, an embodiment of a method for diagnosing a rubber lining in a hydrochloric acid tank according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a hydrochloric acid tank to which the rubber lining diagnostic method of the present embodiment is applied. As shown in the figure, this hydrochloric acid tank has a square cross section and is elongated in the front-rear direction of the figure. In the figure, reference numeral 1 denotes an iron skin constituting the outer frame of the hydrochloric acid tank, and reference numeral 2 denotes an acid-resistant rubber lining stretched on the inner side of the iron skin 1. The acid-resistant brick 3 is laminated on the inner side of the rubber lining 2, and the expansion rubber 4 is interposed between the layers of the acid-resistant brick 3 at predetermined intervals in the longitudinal direction of the hydrochloric acid tank. Is provided. The expansion rubber 4 is also made of acid-resistant rubber similar to the rubber lining 2.

図２ａには、耐酸煉瓦３の積層部分の縦断面図を、図２ｂには、エキスパンションゴム４の部分の縦断面図を示す。積層される耐酸煉瓦３同士の間は目地５で埋められているが、この目地５から染みこんだ塩酸又は塩酸を含む液によってゴムライニング２が劣化する。また、エキスパンションゴム４は、塩酸槽の熱膨張や熱収縮を吸収されるために設けられているが、エキスパンションゴム４の内側は、槽内の塩酸又は塩酸を含む液に直接晒される。   FIG. 2 a shows a longitudinal sectional view of the laminated portion of the acid-resistant brick 3, and FIG. 2 b shows a longitudinal sectional view of the portion of the expansion rubber 4. The space between the acid-resistant bricks 3 to be laminated is filled with joints 5, but the rubber lining 2 is deteriorated by hydrochloric acid or liquid containing hydrochloric acid soaked from the joints 5. The expansion rubber 4 is provided to absorb thermal expansion and contraction of the hydrochloric acid tank, but the inside of the expansion rubber 4 is directly exposed to hydrochloric acid or a liquid containing hydrochloric acid in the tank.

従来は、ゴムライニング２の劣化状態を診断するため、耐酸煉瓦３の一部を除去し、ゴムライニング２から直接的に試料を採取し、劣化層の厚さを測定するなどしている。一方、本実施形態では、図３に示すように、エキスパンションゴム４の槽内側部分から、例えばコアドリルのような工具で穴を穿ち、ゴムライニング２に及ぶ試料又はゴムライニング２近傍に及ぶ試料５を細長く切り取って採取し、図４に示すように、その試料５のゴムライニング２の近傍部分７でゴムライニング２の劣化状態を診断する。エキスパンションゴム４はゴムライニング２と同様の耐酸性ゴムであり、採取・診断する部位もゴムライニング２の近傍部分であるから、その部分の劣化状態は、ゴムライニング２の劣化状態と同等又はほぼ同等である。従って、ゴムライニングの劣化状態を診断する際に、耐酸煉瓦３の一部を除去したり、ゴムライニング２から直接的に試料を採取したりする必要がなく、操業停止時間やコストを低減することができる。   Conventionally, in order to diagnose the deterioration state of the rubber lining 2, a part of the acid-resistant brick 3 is removed, a sample is directly collected from the rubber lining 2, and the thickness of the deterioration layer is measured. On the other hand, in this embodiment, as shown in FIG. 3, a sample extending to the rubber lining 2 or a sample 5 extending to the vicinity of the rubber lining 2 is formed by drilling a hole from the inner portion of the expansion rubber 4 with a tool such as a core drill. The thin lining is cut out and collected, and as shown in FIG. 4, the deterioration state of the rubber lining 2 is diagnosed in the vicinity 7 of the rubber lining 2 of the sample 5. The expansion rubber 4 is an acid-resistant rubber similar to the rubber lining 2, and the part to be collected and diagnosed is also a part near the rubber lining 2, so the deterioration state of that part is the same as or almost the same as the deterioration state of the rubber lining 2. It is. Therefore, when diagnosing the deterioration state of the rubber lining, it is not necessary to remove a part of the acid-resistant brick 3 or to collect a sample directly from the rubber lining 2, and to reduce the operation stop time and cost. Can do.

また、エキスパンションゴム４の試料５として切り取られた部分には、図３に示すように同等の耐酸性を有するゴム定形部材６を押し込んだり、或いは不定形ゴム部材を注入したりすることで、復元することができる。
このように、本実施形態の塩酸槽のゴムライニング診断方法によれば、耐酸煉瓦３の外側に耐酸ゴムライニング２を有し、耐酸煉瓦３同士の間に、塩酸又は塩酸を含む液体に接触するエキスパンションゴム４を介装する塩酸槽のゴムライニング２を診断するにあたり、エキスパンションゴム４の槽内側部分から、ゴムライニング２に及ぶ試料又はゴムライニング２近傍に及ぶ試料５を切り取り、切り取られた試料５のゴムライニング２近傍部分でゴムライニング２の劣化状態を診断することとしたため、耐酸煉瓦３の一部を除去する必要がなく、操業停止時間や診断コストを低減することができる。 Further, a portion of the expansion rubber 4 cut out as the sample 5 is restored by pushing a rubber shaped member 6 having equivalent acid resistance as shown in FIG. 3 or by injecting an amorphous rubber member. can do.
Thus, according to the rubber lining diagnostic method for a hydrochloric acid tank according to the present embodiment, the acid-resistant brick 3 has the acid-resistant rubber lining 2 outside the acid-resistant brick 3, and the acid-resistant brick 3 is in contact with the liquid containing hydrochloric acid or hydrochloric acid. In diagnosing the rubber lining 2 of the hydrochloric acid tank interposing the expansion rubber 4, the sample extending to the rubber lining 2 or the sample 5 extending to the vicinity of the rubber lining 2 is cut out from the inner portion of the expansion rubber 4, and the cut sample 5 Since the deterioration state of the rubber lining 2 is diagnosed in the vicinity of the rubber lining 2, it is not necessary to remove a part of the acid-resistant brick 3, and the operation stop time and diagnostic cost can be reduced.

本発明の塩酸槽のゴムライニング診断方法の一実施形態を示す塩酸槽の概略構成図である。It is a schematic block diagram of the hydrochloric acid tank which shows one Embodiment of the rubber lining diagnostic method of the hydrochloric acid tank of this invention. (ａ）は図１の塩酸槽の耐酸煉瓦部分の縦断面図、（ｂ）は図１の塩酸槽のエキスパンションゴム部分の縦断面図である。(a) is a longitudinal cross-sectional view of the acid-resistant brick part of the hydrochloric acid tank of FIG. 1, (b) is a longitudinal cross-sectional view of the expansion rubber part of the hydrochloric acid tank of FIG. エキスパンションゴムから試料を切り出す説明図である。It is explanatory drawing which cuts out a sample from expansion rubber. 図３で切り出された資料の説明図である。It is explanatory drawing of the material cut out in FIG.

符号の説明Explanation of symbols

１は鉄皮、２はゴムライニング、３は耐酸煉瓦、４はエキスパンションゴム、５は試料、６はゴム定形部材、７は近傍部分   1 is an iron skin, 2 is a rubber lining, 3 is acid-resistant brick, 4 is an expansion rubber, 5 is a sample, 6 is a rubber shaped member, and 7 is a nearby portion

Claims (1)

耐酸煉瓦の外側に耐酸ゴムライニングを有し、耐酸煉瓦同士の間に、塩酸又は塩酸を含む液体に接触するエキスパンションゴムを介装する塩酸槽のゴムライニング診断方法であって、前記エキスパンションゴムの槽内側部分から、ゴムライニングに及ぶ試料又はゴムライニングの近傍に及ぶ試料を切り取り、切り取られた試料のゴムライニング近傍部分でゴムライニングの劣化状態を診断することを特徴とする塩酸槽のゴムライニング診断方法。   A method for diagnosing a rubber lining in a hydrochloric acid tank having an acid-resistant rubber lining on the outside of the acid-resistant brick and interposing an expansion rubber that comes into contact with hydrochloric acid or a liquid containing hydrochloric acid between the acid-resistant bricks, the expansion rubber tank A method for diagnosing a rubber lining in a hydrochloric acid tank, wherein a sample extending to the rubber lining or a sample extending to the vicinity of the rubber lining is cut from the inner portion, and the deterioration state of the rubber lining is diagnosed at the portion near the rubber lining of the cut sample. .
JP2008259946A 2008-10-06 2008-10-06 Rubber lining diagnosis method for hydrochloric acid tank Expired - Fee Related JP5309857B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4866034A (en) * 1971-12-14 1973-09-11
JPS5754283A (en) * 1980-09-17 1982-03-31 Maruei Kako Kk Pickling tank
JPS6027467A (en) * 1983-07-26 1985-02-12 Nippon Steel Corp Method for deciding end point of internal refractory lining material of vessel for molten metal
JPH0297689A (en) * 1988-10-04 1990-04-10 Nippon Steel Corp Method for repairing pickling tank
JPH1123510A (en) * 1997-06-30 1999-01-29 Nkk Corp Method and device for detecting penetration cracking of rubber lining applied to, metal surface
JP2002005902A (en) * 2000-06-23 2002-01-09 Mitsubishi Heavy Ind Ltd Deterioration diagnostic method of lining body and measuring device therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4866034A (en) * 1971-12-14 1973-09-11
JPS5754283A (en) * 1980-09-17 1982-03-31 Maruei Kako Kk Pickling tank
JPS6027467A (en) * 1983-07-26 1985-02-12 Nippon Steel Corp Method for deciding end point of internal refractory lining material of vessel for molten metal
JPH0297689A (en) * 1988-10-04 1990-04-10 Nippon Steel Corp Method for repairing pickling tank
JPH1123510A (en) * 1997-06-30 1999-01-29 Nkk Corp Method and device for detecting penetration cracking of rubber lining applied to, metal surface
JP2002005902A (en) * 2000-06-23 2002-01-09 Mitsubishi Heavy Ind Ltd Deterioration diagnostic method of lining body and measuring device therefor

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