PL46705B1 - - Google Patents

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Publication number
PL46705B1
PL46705B1 PL46705A PL4670562A PL46705B1 PL 46705 B1 PL46705 B1 PL 46705B1 PL 46705 A PL46705 A PL 46705A PL 4670562 A PL4670562 A PL 4670562A PL 46705 B1 PL46705 B1 PL 46705B1
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PL
Poland
Prior art keywords
grain size
arsenic
ore
ores
iron ore
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Application number
PL46705A
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Polish (pl)
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Publication of PL46705B1 publication Critical patent/PL46705B1/pl

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Description

yjsz* dnia 11 marca 1963 r.KAI POLSKIEJ RZECZYPOSPOLITEJ LUDOWEJ OPIS PATENTOWY Nr 46705 Instytut Metalurgii Zelaza*) Stanislawa Staszica KI. i» *| i/Q^ KI. internat. C 21 b im.Gliwice, Polska- Sposób' odarsenowania rud zelaza Patent trwa od dnia 6 kwietnia 1962 r.Przedmiotem wynalazku jest sposób odarse¬ nowania rud zelaza przez wypalanie mialkiej rudy zgrudkowanej, z dodatkiem zmielonego koksiku lub mialu weglowego, w atmosferze redukcyjnej zawierajacej CO.Arsen wplywajacy ujemnie na jakosc stali musi byc usuniety w procesie przygotowania rud do przeróbki hutniczej, poniewaz usuwa¬ nie go w procesie wielkopiecowym i stalowni¬ czym nie jest mozliwe. Stosowane dotychczas Bposoby odarsenowania rud polegaly na usu¬ waniu arsenu [w jprocesie wzbogacania rud, np. przy prazeniu magnetyzujacym, badz tez przy zwyklym prazeniu lub spiekaniu rud.Stopien odarsenowania rud tymi sposobami byl niski, gdyz wynosil 30 do 50%. W rezulta¬ cie przy wejsciowych zawartosciach arsenu w rudach rzedu 0,1% uzyskiwalo sie produkt o *) Wlasciciel patentu oswiadczyl, ze wsipól- twóroami wynalazku sa doc. mgr lnz. An¬ drzej Ofiok i imgir inz. Stefan Zielinski. zawartosci arsenu, przekraczajacej normy (do¬ puszczalne dla przeróbki hutniczej.Pierwsze dwa z wymienionych sposobów od- arsenowywania rud posiadaly ponadto ta ujemna ceche, ze uzyskiwalo sie produkt drob¬ noziarnisty, wymagajacy dodatkowego zbryle¬ nia.W sposobie odarsenowywania wedlug wy¬ nalazku uzyskuje sie wysoki, powyzej 90%, stopien odarsenowania przy równoczesnym zbrylaniu rudy w grudki, a wiec przygotowa¬ niu jej pod wzgledem fizycznym do procesu wielkopiecowego.W sposobie wedlug wynalazku rude zelazna zawierajaca arsen, zmielona do ziarnistosci od¬ powiadajacej powierzchni wlasciwej powyzej 1000 cm2/g, grudkuje sie z dodatkiem rozdrob¬ nionego do ziarnistosci ponizej 1 mm koksi¬ ku lub mialu weglowego. Uzyskane w ten spo¬ sób grudki wypala sie przy temperaturach nie nizszych od 1100°C w urzadzeniach do wy¬ palania grudek.Warunkiem koniecznym odairsenówania jeat utrzymanie atmosfery redukujacej w urzadze¬ niu do wypalania. W tym celu spalanie pali¬ wa prowadzi sie z niedomiarem powietrza tak, zeby spaliny zawieraly wolny CO. W tych wa¬ runkach zwiazki arsenu ulegaja redukcji i su- blimuja z pieca ze spalinami. PLyjsz * on March 11, 1963 KAI OF THE POLISH PEOPLE'S REPUBLIC PATENT DESCRIPTION No. 46705 Instytut Metalurgii Zelaza *) Stanisław Staszic KI. and »* | and / Q ^ KI. boarding school. C 21 b, Gliwice, Poland - The method of iron ore dearseation The patent lasts from April 6, 1962 The subject of the invention is a method of iron ore dearseation by firing fine grained ore with the addition of ground coke breeze or coal fines CO. Arsenic, which adversely affects the quality of steel, must be removed in the process of preparing ores for metallurgical processing, because its removal in the blast furnace and steelmaking process is not possible. The ores dearsenization methods used so far consisted in the removal of arsenic [in the ore enrichment process, for example in magnetizing roasting, or in ordinary roasting or sintering of ores. As a result, at the initial content of arsenic in the ores in the order of 0.1%, a product was obtained. *) The patent owner stated that the inventive products are Assoc. lnz. Andrzej Ofiok and Imgir Engineer Stefan Zielinski. arsenic content exceeding the standards (acceptable for metallurgical processing. The first two of the above-mentioned methods of ore de-arsenic, also had the negative characteristic that a fine-grained product was obtained, requiring additional lumpiness. a high, over 90%, degree of decaying with the simultaneous agglomeration of the ore into pellets, i.e. its preparation in physical terms for the blast furnace process. In the method of the invention, the iron ore containing arsenic, ground to a grain size corresponding to a specific surface above 1000 cm2 / g, is lumped with the addition of coke or coal dust crushed to a grain size below 1 mm. The lumps obtained in this way are burnt at temperatures not lower than 1100 ° C in pellet firing equipment. maintenance of a reducing atmosphere in the firing plant, for which the combustion of the fuel is insufficient so that the exhaust gas contains free CO. Under these conditions, the arsenic compounds are reduced and softened out of the furnace with the flue gas. PL

Claims (1)

1. Zastrzezenie patentowe Sposób odairsienoiwamia rud zelaza, znannien- ny tym, ze rudy zelaza o ziairnistosci odpowia¬ dajacej powierzchni wlasciwej powyzej 1ÓÓ0 cm2/g, zawierajace arsen, grudkuje sie z do¬ datkiem mialkiego rozdrobnionego do ziar¬ nistosci ponizej 1 mm koksiku lub mialu we¬ glowego, a proces wypalania grudek przy tem¬ peraturach nie nizszych od 110Q°C prowadzi sie w atmosferze redukcyjnej zawierajacej CO. Instytut Metalurgii Zelaza im. Stanislawa S/taszica 8973. RSW „Prasa", Kielce PL1. Patent claim A method of dehydrating iron ores, known in the fact that iron ore with a grain size corresponding to a specific surface area greater than 10 cm2 / g, containing arsenic, is pelleted with the addition of fine crushed to a grain size less than or 1 mm. pulverized coal, and the pellet firing at temperatures not lower than 110 ° C is carried out in a reducing atmosphere containing CO. Zelaza Metallurgy Institute Stanislawa S / taszica 8973. RSW "Press", Kielce PL
PL46705A 1962-04-06 PL46705B1 (en)

Publications (1)

Publication Number Publication Date
PL46705B1 true PL46705B1 (en) 1963-02-15

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