CS211604B1 - The method of pre-treatment of sheet coils before pickling - Google Patents

The method of pre-treatment of sheet coils before pickling Download PDF

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Publication number
CS211604B1
CS211604B1 CS674079A CS674079A CS211604B1 CS 211604 B1 CS211604 B1 CS 211604B1 CS 674079 A CS674079 A CS 674079A CS 674079 A CS674079 A CS 674079A CS 211604 B1 CS211604 B1 CS 211604B1
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Czechoslovakia
Prior art keywords
coiled
aqueous suspension
coils
pickling
before pickling
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CS674079A
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Czech (cs)
Slovak (sk)
Inventor
Anton Hlavacik
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Anton Hlavacik
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Priority to CS674079A priority Critical patent/CS211604B1/en
Publication of CS211604B1 publication Critical patent/CS211604B1/en

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  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

Sposob predúpravy zvitkov plechu před ich mořením v procese výroby jemných plechov válcováním za studená. Patent rieši problém zrovnomernenia tvorby okovín a zníženie ich množstva v závitoch zvitku po vyvalcování za tepla. Riešenie tohoto problému spočívá v tom, že pri teplote nad 550 °C sa navíjaný plech, alebo čela navinutého zvitku ponoria po dx>bu najviac 2 minút do vodnej suspenzie, obsahujúcej 16 až 20 Z kaolinu a 0,1 Z zmáčadla. S výhodou možno este použit vodnú suspenzíu, ktorá dalej obsahuje 3 až 4 Z kyseliny boritej.Method of pre-treating sheet metal coils before pickling in the process of producing fine sheets by cold rolling. The patent solves the problem of equalizing the formation of scale and reducing its amount in the coils of the coil after hot rolling. The solution to this problem consists in that at a temperature above 550 °C the coiled sheet metal or the ends of the coiled coil are immersed for a maximum of 2 minutes in an aqueous suspension containing 16 to 20% kaolin and 0.1% wetting agent. It is also advantageous to use an aqueous suspension that further contains 3 to 4% boric acid.

Description

1 2116041 211604

Vynález sa týká spósobu predúpravy 2vitkov plechu z linky pre valcovanie za tepla předich mořením na účelom dalšieho spracovania napr, válcováním za studená a rieši problém zrovno·mernenia tvorby okovín a zníženia ich množstva a vázby po okrajoch a v závitech zvitku, akoaj vytvorenia izolácie pre dlhšiu dobu skladovania alebo přepravy zvitku.BACKGROUND OF THE INVENTION The present invention relates to a method for pre-treating 2-roll sheet from a hot rolling line for further processing by, for example, cold rolling and solves the problem of scaling and reducing the amount and bonding of the coils, as well as the formation of insulation for longer storage or transport of the roll.

Po válcování za tepla vznikajú na povrchu plechu navinutého do zvitku okuje tvořené najm'ákysličníkami železa FeO, Fe2O^, Fe^O^. Ich hmotnost sa pohybuje v hraniciach 50 až 130 gm”2podlá sortimentu, akosti a teploty spracovania materiálu. Před.dalším spracovaním takéhotopásu je nutné okoviny'z povrchu odstrániť. Najrozšírenejším spósobom odstraňovania okovín jemorenie v kyselinách.After hot rolling, scales formed by iron oxide FeO, Fe2O3, Fe2O3, iron oxide, are formed on the surface of the sheet coiled into the coil. Their weight ranges from 50 to 130 gm ”2 according to the assortment, quality and material processing temperature. Before further processing of such a belt, it is necessary to remove the meshes from the surface. The most widespread way to remove shingles by digesting in acids.

Vzniklé okoviny predstavujú nevratnú stratu základného materiálu, vyžadujú zaradenie ďal-šieho technologického procesu - morenia, teda zvyšujú výrobně náklady. Pre zefektívnenie to-hoto procesu sa prevádzajú rožne úpravy moriacích agregátov, Z praktických ani literárnychpoznatkov nie sú znátye sposoby 2nižovania množstva okovín po válcování za tepla, Sú známe spósoby nanášania aktivačného prostriedku jednostranným nástrekom na pás plechupřed zvinutíra, iný po zvinutí na Sela zvitku, avšak s použitím alkalického kovu a kyselinyv podstatě v suspenznej alebo práŠkovej podobě. Bez ohladu na tažkosti s nástrekom počasnavíjania, nerovnoměrnost nánosu najma na okrajoch, tieto sposoby si vyžadujú poměrně dlhúdobu následného morenia vzhladom na použité kovové zložky povlaku.The resulting cores represent an irreversible loss of the base material, requiring the incorporation of another technological process - pickling, thus increasing production costs. In order to make this process more efficient, modifications of the pickling aggregates are carried out. There are no known methods of reducing the amount of shreds after hot rolling from both practical and literary knowledge. There are known methods of applying the activating agent to the sheet by one-sided spraying on a sheet, other than coiling on a roll, but using an alkali metal and an acid substantially in suspension or powder form. Regardless of the difficulty of spraying during the rewind, the unevenness of the coating at the edges, these methods require a relatively long period of subsequent pickling relative to the metal coating components used.

Uvedené nedostatky odstraňuje a problém rieši spósob predúpravy zvitkov plechu před ichmořením pódia vynálezu. Podstata vynálezu spočívá v tom, že pri teplote nad 550 °C sa navíja-ný plech alebo čelá navinutého zvitku ponoria po dobu najviac 2 minút do vodnej suspenzíe,obsahujúcej 16 až 20 Z kaolínu a 0,1 Z zmácadlá. S výhodou možno este použit vodná suspenziu^.ktorá dalej obsahuje 3 až 4 Z kyseliny boritej. Výhodou tohoto vynálezu je obraedzenie tvorby okovinového povlaku a zlepšenie jeho rozpustnosti v kyselinách, čo pri spracovaní v kontinuálnej linke umožní zvýšit pracovnu rychlostpri moření. S tým sávisí aj zníženie straty základného materiálu a teda aj zníženie spotřebykyše i iny. Příklady uskutočnenia spósobu podlá vynálezu: 19,9 Z kaolínu 0,1 Z zmáčadlo /slovafol 909/ 80 Z voda Příklad 2 16,4 Z kaolínu3,5 Z kyselina boritá0,1 Z zmáčadlo /slovafol 909/ 80 Z vodaThe aforementioned drawbacks are solved and the problem is solved by a method of pre-treating the coils of the sheet prior to the swelling of the invention. The invention is based on the fact that, at a temperature above 550 ° C, the coiled sheet or coil winding head is immersed in an aqueous suspension containing 16 to 20 of kaolin and 0.1% of a wettable liquid for up to 2 minutes. Preferably, an aqueous suspension further containing 3 to 4 of boric acid may be used. It is an advantage of the present invention to prevent the formation of an ocular coating and to improve its solubility in acids, which, when processed in a continuous line, makes it possible to increase the working speed of the pickling. This also depends on a reduction in the loss of the base material and thus a reduction in consumption and other costs. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION: 19.9 Of kaolin 0.1 Z wetting agent / Slovafol 909/80 Z water Example 2 16.4 Of kaolin3.5 Z boric acid 0.1 Z wetting agent / Slovafol 909/80 Z water

Uvedené média boli odskúšané vti cca 5 kg po vyhriatí v inertnejpódia příkladu 1 a 2 po dobu 1 ažvzorky a mořené v 20 Z H^SO^. laboratornych podmienkach. Čela navinutých zvitkov hmotnosatmosféře na teplotu 600 °C boli postriekané suspenziou2 minut, po schladnutí na volnej atmosféře boli odobranéSaid media were tested about 5 kg after heating in an inert base of Examples 1 and 2 for 1 to a sample and pickled in 20% H 2 SO 4. laboratory conditions. The coils of coiled coils at 600 ° C were sprayed with suspension for 2 minutes, collected after cooling in free atmosphere.

Rychlost morenia postriekaných zvitkov bola podstatné vyššia oproti nepostriekanýmřa toaž o 21,3, resp. 29,5 Z u hlbokotažných ocelí a až o 28,0, resp. 34,9 Z u křemíkových ocelí,čo úměrně ukazuje na úsporu kovu zo zníženia množstva okovín.The pickling rate of the sprayed coils was significantly higher than the non-sprayed coils by 21.3, respectively. 29.5 Z for deep drawing steels and up to 28.0 resp. 34.9 Z for silicon steels, which shows a proportion of metal savings from a reduction in the amount of shingles.

Claims (2)

211604 2 PREDMET VYNÁLEZU211604 2 SUBJECT OF THE INVENTION 1. Spósob predúpravy zvitkov plechu před ich mořeními a to pri, alebo po navinutí, vyznáčujúci sa tým, že pri teplote nad 550 °C aa navíjený plech;alebo čela navinutého zvitku ponoria po dobu najviac 2 minút do vodnej suspenzie, obsahujúcej 16 až 20 % kaolínu a 0,1 %zmá&adla·A method for pre-treating sheet metal coils prior to their pickling at or after winding, characterized in that at a temperature above 550 ° C and the coiled sheet, or the coiled ends of the coiled coil for up to 2 minutes, into an aqueous suspension containing 16-20% % kaolin and 0.1% blends & 2* Spósob p.odla ^odu 1, vyznaču júcí sa tým, že vodná suspenzie dalej obsahuje 3 až 4 %kyseliny boritej♦ Srverognfb. n. p- xivod 7. Most2. A process as claimed in claim 1, wherein the aqueous suspension further comprises 3 to 4% of boronic acid. n. p- xivod 7. Most
CS674079A 1979-10-04 1979-10-04 The method of pre-treatment of sheet coils before pickling CS211604B1 (en)

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