PL424631A1 - Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD) - Google Patents

Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD)

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Publication number
PL424631A1
PL424631A1 PL424631A PL42463115A PL424631A1 PL 424631 A1 PL424631 A1 PL 424631A1 PL 424631 A PL424631 A PL 424631A PL 42463115 A PL42463115 A PL 42463115A PL 424631 A1 PL424631 A1 PL 424631A1
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PL
Poland
Prior art keywords
furnace
zinc
dust
weight
charge
Prior art date
Application number
PL424631A
Other languages
Polish (pl)
Other versions
PL230286B1 (en
Inventor
Jerzy CZEKAJ
Lidia Kalecińska
Jan Galicki
Jacek JAKUBOWSKI
Krzysztof Ochab
Krzysztof Bigaj
Jacek Kościuk
Original Assignee
Zakłady Górniczo-Hutnicze BOLESŁAW Spółka Akcyjna
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Application filed by Zakłady Górniczo-Hutnicze BOLESŁAW Spółka Akcyjna filed Critical Zakłady Górniczo-Hutnicze BOLESŁAW Spółka Akcyjna
Priority to PL424631A priority Critical patent/PL230286B1/en
Publication of PL424631A1 publication Critical patent/PL424631A1/en
Publication of PL230286B1 publication Critical patent/PL230286B1/en

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Abstract

W zgodnym z wynalazkiem sposobie przerobu pyłów stalowniczych z elektrostalowni mieszaninę pyłów z reduktorem w postaci mieszanki koksiku i antracytu oraz kamienia wapiennego o zawartości ok. 96% CaCO3, po ich dokładnym wymieszaniu kieruje się w sposób ciągły do przestrzeni roboczej pieca obrotowego (3) stanowionego przez nachylony w stosunku do podłoża stalowy walczak wyłożony wewnątrz materiałami ceramicznymi, gdzie dzięki jego pochyleniu i ruchu obrotowego regulowanego skokowo wsad przemieszcza się. Wsad przesuwając się wzdłuż rozgrzanego walczaka pieca (3) ulega suszeniu, a następnie, na odcinku ok. 20% długości przestrzeni roboczej pieca (3) nagrzewa się do temperatury 1100°C. W drugiej strefie pieca (3) na odcinku ok. 60% jego całkowitej długości wsad nagrzewa się do temperatury 1100-1250°C, w której z warstwy wsadu redukuje się cynk, a następnie odparowuje się wyredukowany cynk i powietrzem zasysanym przez wentylator odciągowy (3.3) utlenienia się go w tej przestrzeni pieca (3). Utleniony cynk unoszony strumieniem gazów technologicznych przedostaje się do trzeciej strefy pieca (3), gdzie na ok. 20% jego całkowitej długości zanika reakcja redukcji, a tworzy się żużel stanowiący odpad z procesu. Odpad o temperaturze ok. 550 - 650°C grawitacyjnie opuszcza piec (3), natomiast unoszone w strumieniu gazów technologicznych tlenkowe pyły cynkowe opuszczając przestrzeń roboczą pieca (3) odkładają się w kolejnych urządzeniach instalacji chłodząco-odpylającej, to jest w komorze pyłowej (6) chłodnicach wymiennikowych, gorącej (10) i zimnej (11) oraz sześciokomorowym filtrze (13) intensywnego odpylania. Produkt procesu przewałowego w postaci surowego tlenku cynku odkładający się w chłodnicach (10, 11) zawiera od 52% do 56% wag. Zn i 2,5% - 2,9% wag. Pb, natomiast odkładający się w filtrze (13) zawiera od 59% do 64% wagowych Zn i 4,5% - 6,0% wagowych Pb o uziarnieniu poniżej 0,04 mm i ciężarze usypowym w granicach 1,2 - 1,4 Mg/m3. Uzysk cynku z materiału odpadowego otrzymanego tym sposobem wynosi od 89% do 92%.In the method of processing steel dust from the power plant in accordance with the invention, a mixture of dust with a reducer in the form of a mixture of coke breeze and anthracite and limestone with a content of ca. steel drum slanted in relation to the ground lined inside with ceramic materials, where due to its inclination and rotational movement regulated by steps, the charge moves. The charge, moving along the heated furnace drum (3), is dried, and then, over a section of approx. 20% of the length of the furnace working space (3), it heats up to a temperature of 1100 ° C. In the second furnace zone (3) on a section of approx. 60% of its total length, the charge is heated to a temperature of 1100-1250 ° C, in which the zinc layer is reduced from the charge layer, and then the reduced zinc is evaporated and the air sucked in by the extraction fan (3.3) ) it oxidizes in this furnace space (3). Oxidized zinc carried by the stream of process gases enters the third zone of the furnace (3), where the reduction reaction disappears for approx. 20% of its total length, and slag forming waste from the process is formed. Waste at a temperature of about 550 - 650 ° C gravitational leaves the furnace (3), while zinc oxide dust raised in the process gas stream leaving the furnace working space (3) is deposited in subsequent devices of the cooling-dedusting installation, i.e. in the dust chamber (6) ) heat exchangers, hot (10) and cold (11) and six-chamber filter (13) of intensive dust removal. The product of the break-through process in the form of raw zinc oxide deposited in the coolers (10, 11) contains from 52% to 56% by weight. Zn and 2.5% - 2.9% by weight Pb, whereas in the filter (13) contains from 59% to 64% by weight of Zn and 4.5% - 6.0% by weight of Pb with grain size less than 0.04 mm and a bulk density in the range of 1.2 - 1.4 mg / m3. The yield of zinc from the waste material obtained in this way is from 89% to 92%.

PL424631A 2015-06-01 2015-06-01 Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD) PL230286B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL424631A PL230286B1 (en) 2015-06-01 2015-06-01 Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL424631A PL230286B1 (en) 2015-06-01 2015-06-01 Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD)

Publications (2)

Publication Number Publication Date
PL424631A1 true PL424631A1 (en) 2018-04-23
PL230286B1 PL230286B1 (en) 2018-10-31

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PL424631A PL230286B1 (en) 2015-06-01 2015-06-01 Method for processing zinciferous waste materials, in particular steelmaking dusts from electric power plants (EAFD)

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PL (1) PL230286B1 (en)

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PL230286B1 (en) 2018-10-31

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