ES2166673B1 - IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST. - Google Patents

IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST.

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Publication number
ES2166673B1
ES2166673B1 ES9902069A ES9902069A ES2166673B1 ES 2166673 B1 ES2166673 B1 ES 2166673B1 ES 9902069 A ES9902069 A ES 9902069A ES 9902069 A ES9902069 A ES 9902069A ES 2166673 B1 ES2166673 B1 ES 2166673B1
Authority
ES
Spain
Prior art keywords
sub
waelz
treatment
raw material
fixed
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.)
Expired - Lifetime
Application number
ES9902069A
Other languages
Spanish (es)
Other versions
ES2166673A1 (en
Inventor
Sierra Iker Danobeitia
Gandiaga Nestor Goicoechea
Ochoa De Alda Javier Vallejo
Vergara Borja Garcia-Egocheaga
Fernandez Angel Hernandez
Montes Juliana Nancy Ayala
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.)
Cia Ind Asua Erandio S A Aser
Original Assignee
Cia Ind Asua Erandio S A Aser
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 Cia Ind Asua Erandio S A Aser filed Critical Cia Ind Asua Erandio S A Aser
Priority to ES9902069A priority Critical patent/ES2166673B1/en
Publication of ES2166673A1 publication Critical patent/ES2166673A1/en
Application granted granted Critical
Publication of ES2166673B1 publication Critical patent/ES2166673B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Mejoras en el proceso Waelz para el tratamiento de polvos de acerías Es una modifición del proceso Waelz, con mejora de la calidad de los productos resultantes, escoria y óxido Waelz, en lo relativo a contenidos mínimos de halógenos (< 0,01%), especialmente fluor. En primer lugar se peletiza la materia prima con carbón o coque molido, pequeñas adiciones de sílice y un producto sulfurante si no lo llevara la materia prima. En el horno de aceite o carbón pulverizado se alcanza una temperatura superior a 1200 °C, con exceso de aire introducido por la parte opuesta a la entrada de pelets, junto a azufre, para que se cree una atmósfera de SO{sub,2} capaz de reaccionar con los fluoruros que llevan los gases, formando HF que se fijará sobre el ZnO recogido. Finalmente, el ZnF{sub,2} y ZnCl{sub,2} fijado sobre las partículas de ZnO se transformarán en sus sales alcalinas solubles por lavado con una solución de carbonato sódico.Improvements in the Waelz process for the treatment of steelworks powders It is a modification of the Waelz process, with improvement of the quality of the resulting products, slag and Waelz oxide, in terms of minimum halogen contents (<0.01%), especially fluor. First, the raw material is pelletized with coal or ground coke, small additions of silica and a sulfurizing product if the raw material does not carry it. In the oil or pulverized coal furnace a temperature higher than 1200 ° C is reached, with excess air introduced by the opposite part of the pellet inlet, next to sulfur, so that an atmosphere of SO {sub, 2} is created able to react with the fluorides that the gases carry, forming HF that will be fixed on the collected ZnO. Finally, the ZnF {sub, 2} and ZnCl {sub, 2} fixed on the ZnO particles will be transformed into their soluble alkaline salts by washing with a solution of sodium carbonate.

ES9902069A 1999-09-17 1999-09-17 IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST. Expired - Lifetime ES2166673B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES9902069A ES2166673B1 (en) 1999-09-17 1999-09-17 IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9902069A ES2166673B1 (en) 1999-09-17 1999-09-17 IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST.

Publications (2)

Publication Number Publication Date
ES2166673A1 ES2166673A1 (en) 2002-04-16
ES2166673B1 true ES2166673B1 (en) 2003-10-16

Family

ID=8309968

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9902069A Expired - Lifetime ES2166673B1 (en) 1999-09-17 1999-09-17 IMPROVEMENTS IN THE WAELZ PROCESS FOR THE TREATMENT OF ACERIAS DUST.

Country Status (1)

Country Link
ES (1) ES2166673B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107012336A (en) * 2017-04-01 2017-08-04 巩卫红 Rotary kiln oxygen-rich treated industrial solid castoff produces the method and device of Second-rate zinc oxide powder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510141B1 (en) * 1981-07-21 1986-10-31 Promotion Procedes Hydro Metal HYDROMETALLURGICAL PROCESS FOR TREATING ZINC-CONTAINING DUST FROM ELECTRIC STEEL OVENS
AT392289B (en) * 1988-04-08 1991-02-25 Voest Alpine Stahl Donawitz METHOD FOR UTILIZING ZINC-CONTAINED DUST AND SLUDGE
US5186741A (en) * 1991-04-12 1993-02-16 Zia Patent Company Direct reduction process in a rotary hearth furnace
ES2038917B1 (en) * 1991-10-28 1994-07-16 Luengo Gerardo Espeso PROCEDURE FOR THE TRANSFORMATION OF IMPURE ZINC OXIDES INTO HIGH PURITY ZINC OXIDES.
JP3516854B2 (en) * 1997-11-20 2004-04-05 スチールプランテック株式会社 Steelmaking furnace dust treatment method and dust pellets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107012336A (en) * 2017-04-01 2017-08-04 巩卫红 Rotary kiln oxygen-rich treated industrial solid castoff produces the method and device of Second-rate zinc oxide powder

Also Published As

Publication number Publication date
ES2166673A1 (en) 2002-04-16

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