JPS6011272A - Manufacture of dust preventive basic spraying material - Google Patents

Manufacture of dust preventive basic spraying material

Info

Publication number
JPS6011272A
JPS6011272A JP11514083A JP11514083A JPS6011272A JP S6011272 A JPS6011272 A JP S6011272A JP 11514083 A JP11514083 A JP 11514083A JP 11514083 A JP11514083 A JP 11514083A JP S6011272 A JPS6011272 A JP S6011272A
Authority
JP
Japan
Prior art keywords
water
mgo
less
dust
spraying
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
Application number
JP11514083A
Other languages
Japanese (ja)
Other versions
JPS62114B2 (en
Inventor
戸田 増実
茂 奥田
石井 豊浩
野中 慎吾
光畑 憲二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinagawa Refractories Co Ltd
Shinagawa Shiro Renga KK
Original Assignee
Shinagawa Refractories Co Ltd
Shinagawa Shiro Renga KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shinagawa Refractories Co Ltd, Shinagawa Shiro Renga KK filed Critical Shinagawa Refractories Co Ltd
Priority to JP11514083A priority Critical patent/JPS6011272A/en
Publication of JPS6011272A publication Critical patent/JPS6011272A/en
Publication of JPS62114B2 publication Critical patent/JPS62114B2/ja
Granted legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 本発明はタンディシュ内張り耐火物の表面コーテイング
材としての吹付材の製造方法に関し、特に吹付施工時に
粉塵の発生が少なく、吐出性の良好な塩基性吹付材の製
造方法を提供することを目的とする。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a spray material as a surface coating material for tundish lining refractories, and in particular, a method for producing a basic spray material that generates less dust during spray construction and has good discharge properties. The purpose is to provide.

従来、タンディシュは内張り耐火物を保護し、地金除去
作業を容易にするためにその上に高アルミナ質またはマ
グネシア質等の塩基性コーテイング材を、通常10−.
2A−重量%の水分でコテ塗りする施工方法が一般的に
行なわれていたが、近年作業能率の向上、施工時間の短
縮等を図るためボード或いは吹付材(吹付用耐火物)に
よる施工方法が実施されるようになってきた。しかしボ
ードによる施工は単価が高いことと共に、施工時タンデ
ィシュの冷却を必要とし、またボードが灰化して微粉物
が飛散し作業環境を悪化させる等の問題があるため高温
でもタンディシュの補修が可能な吹付材による施工方法
が有力視されている。これ゛に使用する吹付材は施工性
、特に付着性を重視するため各徨の結合材と共に超微粉
を一定量使用するのが常である。吹付機は通常ドライガ
ンを使用しており、タンディシュの吹付施工体に合うノ
ズルではノズル先端部と水その他の液分を添加する位置
の距離調整が難しく、エアー圧、2〜!r Kg/az
t2で吹付施工する際、この超微粉部分をただ単に混合
しただけの吹付材を使用すると、水と十分な混合ができ
ず、超微粉が粉塵となって発生し、作業環境を著しく悪
化させ、健康を害する轡の問題がある0この発塵を防止
する方法としては、吹付材を吹付機に投入する前に予め
プレミキシングして加湿し、その後吹付根に投入して吹
付補修する方法(特公昭!f’l−2−1日号公報)が
あるが、前処理であるプレミキシングの工程を現場で設
けることは装置及び装置を操作する人が必要なことから
経済的でない。更にタンディシュ用吹伺機のノズルは精
密ではあるが反面詰まり易い欠点もあるため、プレミキ
シングされた吹付材は吹付機のノズル先端から吐出する
際、少量の水の湿りでも詰まり易く、施工された表面の
性状は必ずしも良好であるとは言えない。他の方法とし
ては超微粉部分を一度造粒する方法も考えられるが、造
粒するためにはかなりのコスト高となる。
Traditionally, tundishes have been coated with a basic coating material such as high alumina or magnesia, usually 10-.
2A-A construction method of troweling with 2A-wt% moisture was commonly used, but in recent years, in order to improve work efficiency and shorten construction time, construction methods using boards or sprayed materials (sprayed refractories) have been used. It is starting to be implemented. However, construction using boards is expensive, requires cooling of the tundish during construction, and has problems such as the board turning into ashes and scattering fine particles, worsening the work environment, so it is not possible to repair the tundish even at high temperatures. Construction methods using sprayed materials are considered to be a promising method. The spraying material used for this purpose usually uses a certain amount of ultrafine powder along with the binder of each material, since the importance is placed on workability, especially adhesion. The spraying machine usually uses a dry gun, and with a nozzle that matches the tundish spray construction, it is difficult to adjust the distance between the nozzle tip and the point where water or other liquid is added, and the air pressure is 2~! r Kg/az
When spraying at t2, if a spraying material that is simply mixed with this ultra-fine powder part is used, it will not be able to mix sufficiently with water, and the ultra-fine powder will turn into dust, which will significantly worsen the working environment. There is a problem of sludge that is harmful to health.One method to prevent this dust generation is to pre-mix and humidify the spraying material before putting it into the spraying machine, and then putting it into the spraying base for spraying repair (special However, it is not economical to provide a pre-mixing process, which is a pre-treatment, on site because it requires equipment and a person to operate the equipment. Furthermore, although the nozzles of tundish blowing machines are precise, they also have the disadvantage of being easily clogged, so when premixed spray material is discharged from the tip of the spray machine, even a small amount of water can easily clog the applied surface. It cannot be said that the properties are necessarily good. Another possible method is to granulate the ultrafine powder portion once, but granulation requires a considerable amount of cost.

そこでタンディシュ用の吹付材は施工性、特に付着性が
秀れているだけでは無く、水との混合性が良く、粉塵の
発生が少ない吹付材を開発すべく研究を重ねた結果、本
発明に到達するに至った。
Therefore, as a result of repeated research to develop a spray material for tundishes that not only has excellent workability, especially adhesion, but also has good miscibility with water and generates less dust, the present invention was developed. reached it.

即ち本発明は粒度調整されたMgOを主原料とする塩基
性吹付材において発塵源となる。、31tm以下のMg
o微粉とθm’mm以下の粘土に予め0.3〜1.j′
重景チの水を添加して湿らせ、密閉容器内で湿気が無く
なるまでMgOを消化させ水分を吸収させる前処理の施
された混合物を使用して、塩基性吹付材を製造すること
により吹付施工時の粉塵発生を防止することが出来たの
である。
That is, the present invention becomes a dust generation source in a basic spray material whose main raw material is MgO whose particle size has been adjusted. , Mg below 31tm
0.3~1. j′
Spraying is done by producing a basic spraying material using a pre-treated mixture that is moistened by adding water from the ground, and then kept in a sealed container until the moisture is removed, allowing the MgO to digest and absorb moisture. This enabled the prevention of dust generation during construction.

本発明において塩基性吹付材の製造方法は主として: (1) 粒度調整された耐火材料の中、粉塵発生源とな
る0、3n以下のMgoe粉と0.8間以下の粘土に0
.3〜へ!重量係の水を添加して湿らせ混練する。この
場合、結合材として添加する各種バインダーには水を添
加する必要は無い。
In the present invention, the method for producing basic spray materials is mainly: (1) Among the refractory materials whose particle size has been adjusted, Mgoe powder of 0.3n or less and clay of 0.8n or less, which are the sources of dust, are
.. Go to 3! Add water by weight to moisten and knead. In this case, there is no need to add water to the various binders added as binders.

添加水分を0.3〜/。−tmn%としたのは。、3重
景チ未満では湿潤が不十分となり、/J重景チを超える
とそれ以上添加水分を多くしても顕著な効果が無いため
である、 (2)上記の如く加湿混練した微粉を容器に入れ、密閉
してUO℃〜ioo℃の温度で一定期間保持し、湿り気
が無くなるまでMgOを消化させ水分を吸収させる。こ
の保持温度はlIo℃以下では湿潤・消化が遅く、10
0℃を超えるとバインダーと混合時に結合材として添加
しているバインダーが硬化するおそれがあり、り000
〜700℃とすることが保持時間を設定する上からも望
ましい、 (3) この密閉容器内でMgOを消化させた微粉混合
物を残りの組成物、(MgO細粒・結合材としての各種
バインダー)と共に混合し、袋詰めをして製品とする、 の3工程から成り、このようにして製造された塩基性吹
付材は、粉塵として発生し易い0.3u以下のMgO微
粉と0.3H以下の粘土を予め水で湿らせることによっ
て、発塵となりにくい集合体とし、また湿り気であるフ
リーの水分はMgOを消化させることにより吸収され、
親水性材を少量添加することによって吹付施工時水との
混合性も良くなり、吐出性が良好で粉感の発生が少ない
塩基性吹付材を得ることが出来るのである。
Added moisture is 0.3~/. -tmn%. This is because if the moisture content is less than 3, the moisture content will be insufficient, and if it exceeds /J, there will be no significant effect even if the amount of water added is increased. It is placed in a container, sealed and kept at a temperature of UO°C to ioo°C for a certain period of time to digest MgO and absorb water until the moisture disappears. If this holding temperature is below lIo℃, wetting and digestion will be slow, and 10
If the temperature exceeds 0℃, the binder added as a binder when mixed with the binder may harden, and
It is desirable to set the temperature to ~700°C from the viewpoint of setting the holding time. (3) The fine powder mixture in which the MgO has been digested in this airtight container is used as the remaining composition (MgO fine particles and various binders as binding materials). The basic spray material produced in this way consists of MgO fine powder of 0.3 U or less, which is easily generated as dust, and MgO fine powder of 0.3 H or less, which are easily generated as dust. By pre-wetting the clay with water, it becomes an aggregate that is less likely to generate dust, and the free moisture is absorbed by digesting MgO.
By adding a small amount of hydrophilic material, the miscibility with water during spraying is improved, and it is possible to obtain a basic spraying material with good discharge properties and less powdery feeling.

本発明の特徴は発座し易い’−3mm以下のMgO微粉
と0.3BH以下の粘土を予め加湿しMgOを消化させ
水分を吸収させる前処理の施された混合物を使用して塩
基性吹付材を製造することで、その実験結果は図に示す
通りであって、図は塩基性吹付材製造時0.3朋のMg
O微粉とOoj 、111!以下の粘土に水を添加せず
に混合した従来法人、水を0.3重量%添加して湿らせ
、MgOを消化させ水分を吸収させる前処理の施された
混合物を使用した本発明法B、添加水分/、!重M%時
の本発明法C1並びに本発明範囲外である2、0重量%
の水を添加して湿らせ、’11g0を消化させ水分を吸
収させる前処理の施された混合物を使用し−た範囲外法
りでそれぞれ製造した塩基吹付材を使用し、吹付施工し
た際の粉塵発生状態を比較したものである。
The feature of the present invention is that it uses a pre-treated mixture of MgO fine powder of -3 mm or less, which is easy to embed, and clay of 0.3 BH or less, which has been pre-humidified to digest MgO and absorb water. The experimental results are as shown in the figure.
O fine powder and Ooj, 111! Method B according to the present invention using a mixture prepared by mixing the following clays without adding water, using a pre-treated mixture to moisten the clay by adding 0.3% by weight of water to digest MgO and absorb water. , added moisture/,! Method C1 of the present invention at weight M% and 2.0 weight% which is outside the scope of the present invention
When sprayed using a base spraying material manufactured using an out-of-range method using a pre-treated mixture that was moistened by adding water, digesting '11g0 and absorbing water, This is a comparison of dust generation conditions.

前記において使用した塩基性吹付材の配合割合はMgO
の粒〜度/、0..以下の粉末60重−f1%、0.3
順以下のMgO微粉微粉3置 の水ヒ粘土微粉/〜5MーM3好ましくは3重量先公知
のバインダー例えば珪酸塩、リン酸塩、ペンナイト等の
計t〜5重量%好ましくは7重景係から成り、粒度分布
はθ.3闘以上lIO〜SO重it%、0.3〜0.0
7m1120〜30重童チ、O0θ7朋重量.2S〜3
5重量%である。この塩基性吹付材をそれぞれ上述の方
法で製造したものを使用してタンディシュの内張り耐火
物から5θcm@れた位置でドライガンを用いエアー圧
,2 K17cm 2,吹、分 付量2θ〜30Kg/−で吹付施工を行ない、粉塵の発
生状態をデジタル粉顔測定器により時間毎に測定したも
ので、本発明方法B及びCによる塩基性吹付材を使用し
た場合は、粉塵の発生が従来法人と比較して著しく減少
している。しかし、本発明範囲外法」)は本発明法Cと
明らかな差を示さなかった。カウント数は粉塵の発生割
合( mylott” )を表わす計数値で測定方法は
昭和S/年弘月22日労働省公示の作業環境測定基準第
4’A号発令第1条の定めによる。
The blending ratio of the basic spray material used in the above is MgO
Grain size/, 0. .. The following powder 60wt-f1%, 0.3
MgO fine powder, fine powder, 3 parts of atomized clay fine powder/~5M-M3, preferably 3 weights, and a known binder such as silicate, phosphate, pennite, etc. in total of t~5% by weight, preferably from 7 layers The particle size distribution is θ. 3 fights or more lIO~SO weight it%, 0.3~0.0
7m1120~30judochi, O0θ7ho weight. 2S~3
It is 5% by weight. Using each of these basic spray materials manufactured by the above-mentioned method, blow air pressure at 2K17cm2 using a dry gun at a position 5θcm from the refractory lining of the tundish, dispensing amount 2θ~30Kg/-. The results show that when basic spraying materials according to methods B and C of the present invention are used, the dust generation is compared to conventional companies. has decreased significantly. However, the "method outside the scope of the present invention") did not show any obvious difference from the method C of the present invention. The count number is a numerical value that represents the dust generation rate (mylott''), and the measurement method is in accordance with Article 1 of the Working Environment Measurement Standard No. 4'A issued by the Ministry of Labor on 22nd Kouki, Showa S/2008.

本発明は前記した説明で明らかな如く、塩基性吹付材を
製造するに際し0.3前以下のMgO微粉とθ。3 m
m以下の粘土に予めO03〜7.5重ti%の水を添加
し、混線により均一に加湿した混合物を密閉容器内でM
gOを消化させ水分を吸収させた後、残りの組成物と混
合する方法により製造した塩基性吹付材を使用すること
によって、吹付施工時、添加する水との混合性が良く、
吐出性が良好になるためノズル先端部で詰まることなく
、施工面が良好な性状となり、粉塵の発生が少なく作業
環境の改心された状態で、付着率が良くリバウンドロス
の少ない吹付施工が実施出来る。
As is clear from the above description, the present invention uses MgO fine powder and θ of 0.3 or less when producing a basic spray material. 3 m
Water of O03 to 7.5 wt.
By using a basic spraying material produced by digesting gO and absorbing water and then mixing it with the remaining composition, it has good miscibility with the water added during spraying construction.
Because the discharge performance is improved, there is no clogging at the tip of the nozzle, and the construction surface has good properties.With less dust generation and a reformed work environment, spraying construction can be carried out with a good adhesion rate and less rebound loss. .

【図面の簡単な説明】[Brief explanation of the drawing]

図は従来法A1本発明法B及び01本発明範囲外法りで
製造した塩基性吹付材にて吹付施工した際の時間毎の粉
塵発生カウント数を説明するグラフである。
The figure is a graph illustrating the number of dust generation counts per hour when spraying was performed using basic spray materials manufactured by conventional method A, method B of the present invention, and method 01 outside the scope of the present invention.

Claims (1)

【特許請求の範囲】[Claims] 0.7m11以下のMgO微粉とθ、Jgg以下の粘土
に予め0.3〜7.5重量%の水を添加して湿らせ、密
閉容器内でMgOを消化させ水分を吸収させる前処理の
施された混合物に、残りのMgO細粒・結合材としての
各種バインダーを混合して製造する事を特徴とするMg
Oを主原料として防発塵性塩基性吹付材の製造方法。
MgO fine powder of 0.7 m11 or less and clay of θ, Jgg or less are moistened by adding 0.3 to 7.5 wt% of water in advance, and pre-treatment is performed to digest MgO and absorb water in a sealed container. Mg is produced by mixing the remaining MgO fine particles and various binders as a binder into the resulting mixture.
A method for producing a dust-proofing basic spray material using O as a main raw material.
JP11514083A 1983-06-28 1983-06-28 Manufacture of dust preventive basic spraying material Granted JPS6011272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11514083A JPS6011272A (en) 1983-06-28 1983-06-28 Manufacture of dust preventive basic spraying material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11514083A JPS6011272A (en) 1983-06-28 1983-06-28 Manufacture of dust preventive basic spraying material

Publications (2)

Publication Number Publication Date
JPS6011272A true JPS6011272A (en) 1985-01-21
JPS62114B2 JPS62114B2 (en) 1987-01-06

Family

ID=14655275

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11514083A Granted JPS6011272A (en) 1983-06-28 1983-06-28 Manufacture of dust preventive basic spraying material

Country Status (1)

Country Link
JP (1) JPS6011272A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63120947A (en) * 1986-11-07 1988-05-25 Tech Res & Dev Inst Of Japan Def Agency Engin brake controller for speed change steering device
US4993692A (en) * 1989-07-10 1991-02-19 Brown William K Unitary tundish linings with flow-control devices
US5318277A (en) * 1989-07-10 1994-06-07 Dresser Industries, Inc. Lined ladles, linings therefor, and method of forming the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63120947A (en) * 1986-11-07 1988-05-25 Tech Res & Dev Inst Of Japan Def Agency Engin brake controller for speed change steering device
US4993692A (en) * 1989-07-10 1991-02-19 Brown William K Unitary tundish linings with flow-control devices
US5318277A (en) * 1989-07-10 1994-06-07 Dresser Industries, Inc. Lined ladles, linings therefor, and method of forming the same

Also Published As

Publication number Publication date
JPS62114B2 (en) 1987-01-06

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