Leveraging Value and Environmental Gains Through Integrated Steel- and Ferroalloy Plant Slag Cleaning

2021 ◽  
Author(s):  
B N Belford ◽  
Andrew A van Niekerk ◽  
Gawie J Lötter ◽  
S C Louw ◽  
W van der Struys
Keyword(s):  
Slag Cleaning ◽  
Ferroalloy Plant

Numerical Simulation of Depleted EAF Jet Flow

2013 ◽  
Vol 444-445 ◽  
pp. 1113-1117
Author(s):  
Chong Wang ◽  
Dao Fei Zhu ◽  
Fan Han Liu ◽  
Shi Bo Wang ◽  
Hua Wang
Keyword(s):  
Cfd Simulation ◽  
Theoretical Foundation ◽  
Slag Layer ◽  
Furnace Operation ◽  
Copper Industry ◽  
Oil Consumption ◽  
Rate Reduction ◽  
Insertion Depth ◽  
Jet Mixing ◽  
Slag Cleaning

In view of the serious problems that low-rate reduction and excessive oil consumption of reducing oil guns which are used in the depleted EAF, analyzing the jet mixing process through the CFD simulation with the method of liquid level tracking, we find that the purpose of mixing slag layer, guaranteeing matte layer precipitation and saving oil can be achieved by changing combination of gas rate of mixture injected by the oil gun, jet speed and insertion depth. The results of this paper provide a theoretical foundation for optimizing reducing technical process of the slag cleaning furnace operation in a copper industry Company.

scholarly journals Ni-Fe-Co alloy – magnesia-iron-silicate slag equilibria and the behavior of minor elements Cu and P in nickel slag cleaning

2021 ◽  
Author(s):  
Katri Avarmaa ◽  
Pekka Taskinen ◽  
Lassi Klemettinen ◽  
Hugh O’Brien ◽  
Daniel Lindberg
Keyword(s):  
Iron Silicate ◽  
Silicate Slag ◽  
Iron Silicate Slag ◽  
Slag Cleaning ◽  
Minor Elements

Slag Cleaning Processes: A Growing Concern

2005 ◽  
Vol 475-479 ◽  
pp. 2745-2752 ◽  
Author(s):  
C.M. Acuna ◽  
M. Sherrington
Keyword(s):  
Matte Grade ◽  
Copper Recovery ◽  
New Approach ◽  
Slag Cleaning ◽  
Leaching Methods ◽  
Copper Metallurgy ◽  
Reduce Emissions ◽  
Temperature Liquid ◽  
Copper Losses ◽  
Liquid Liquid Phase Separation

In the last two decades copper metallurgy has faced tough challenges to comply with environmental regulations and falling copper prices. Although in the last months copper price has increased, still the environmental issue and operation related costs remain and as long as foreseen they will continue to do so. To reduce emissions to the atmosphere and to shorten the converting cycle, most industrial processes, as well as emerging ones, are aiming at production of high matte grade. However, the increase in oxygen potential required by these processes results in highly oxidised slags with significant copper contents, which require their treatment for copper recovery. Despite the fact that long established slag cleaning processes perform reasonaby well for slags in the range 1.5% - 2.5% in copper, i.e. coexisting matte in the order 60% in copper content, they must be reconsidered when applying to slags equilibrating with high matte grades and/or white metal. The present study concentrates on the mechanism of copper losses into slags, its association to sulfur and oxygen, mainly, and methods for its recovery. Based on these considerations, high temperature liquid-liquid phase separation, i.e. Teniente type reactor, slag flotation and slag leaching methods technologies are discussed as specially applied in Chilean smelters. Also, a new approach based on material characteristics of both matte and slag, i.e. magnetic separation, is presented.

scholarly journals Trace Metal Distributions in Nickel Slag Cleaning

2018 ◽  
pp. 379-389 ◽  
Author(s):  
Niko Hellstén ◽  
Pekka Taskinen ◽  
Hannu Johto ◽  
Ari Jokilaakso
Keyword(s):  
Trace Metal ◽  
Slag Cleaning

scholarly journals Slag Cleaning Equilibria in Iron Silicate Slag–Copper Systems

2019 ◽  
Vol 5 (4) ◽  
pp. 463-473 ◽  
Author(s):  
Niko Hellstén ◽  
Lassi Klemettinen ◽  
Dmitry Sukhomlinov ◽  
Hugh O’Brien ◽  
Pekka Taskinen ◽  
...  
Keyword(s):  
Iron Silicate ◽  
Silicate Slag ◽  
Iron Silicate Slag ◽  
Slag Cleaning ◽  
Slag Copper

Phase chemical composition of slag from a direct nickel flash furnace and associated slag cleaning furnace

2012 ◽  
Vol 218 (1-3) ◽  
pp. 101-105 ◽  
Author(s):  
F. B. Waanders ◽  
J. Nell
Keyword(s):  
Chemical Composition ◽  
Flash Furnace ◽  
Slag Cleaning ◽  
Phase Chemical

A CFD STUDY OF FLOWS IN SLAG CLEANING FURNACES

2004 ◽  
Vol 43 (2) ◽  
pp. 145-152 ◽  
Author(s):  
J.L. XIA ◽  
T. AHOKAINEN ◽  
T. KANKAANPÄÄ
Keyword(s):  
Slag Cleaning

Phase Equilibria of “Cu2O”-“FeO”-CaO-MgO-Al2O3 Slags at PO2 of 10-8.5 atm in Equilibrium with Metallic Copper for a Copper Slag Cleaning Production

2010 ◽  
Vol 41 (6) ◽  
pp. 1186-1193 ◽  
Author(s):  
Hector M. Henao ◽  
Claudio Pizarro ◽  
Jonkion Font ◽  
Alex Moyano ◽  
Peter C. Hayes ◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Metallic Copper ◽  
Copper Slag ◽  
Slag Cleaning

scholarly journals The accumulation of fluoride by leaves of woody plants growing in the area of sanitary protection zones in the industrial region of Zaporizhzhya

2020 ◽  
Vol 62 (2) ◽  
pp. 128-138
Author(s):  
Valentina P. Bessonova ◽  
Anastasia V. Sklyarenko
Keyword(s):  
Environmental Pollution ◽  
Woody Plants ◽  
Vegetation Period ◽  
Acer Pseudoplatanus ◽  
Tilia Cordata ◽  
Acer Platanoides ◽  
Protection Zones ◽  
Platanus Orientalis ◽  
Ferroalloy Plant ◽  
Aluminium Plant

AbstractVegetation serves as a universal filter that is capable of protecting the environment from pollution by industrial emissions given the availability of appropriate technical facilities. The aim of this study is to determine the ability of leaves of various species of woody plants growing in the area of sanitary protection zones to accumulate fluorine and to establish the most informative indicators of environmental pollution by its compounds. The object of the study was the species of woody plants growing in the area of protective plantations of a number of enterprises of Zaporizhzhya: Zaporizhzhya Titanium & Magnesium Combine, Zaporizhzhya Aluminium Plant PJSC, Zaporizhzhya Abrasive Plant PJSC, Zaporizhstal PJSC, ‘Zaporizhcoke’ PJSC (KOKS), Zaporizhzhya Ferroalloy Plant PJSC, Zaporizhvohnetryv (‘Vohnetryv’) PJSC, PrJSC ‘Ukrgrafit’ and Zaporizhtransformator PJSC. Under the conditions of sanitary protection zones of enterprises the leaves of woody plants accumulate significantly more fluoride compared to the control specimens. We have established that a gradual accumulation of the element occurs during the vegetation period being the most intense in young leaves. In senescent leaves, the activity of its accumulation begins to diminish. The maximum amount of fluoride was detected by us at the end of the vegetation period. Its highest concentration was found in the leaves of woody plants growing in the forest belt near the Zaporizhzhya Aluminium Plant. According to the level of accumulation of the said phytotoxicant in the leaves of plants growing in the area of sanitary protection zones, industrial enterprises of Zaporizhzhya may be ranked as follows: Zaporizhzhya Aluminium Plant PJSC > Zaporizhzhya Ferroalloy Plant PJSC ≥ ‘Zaporizhcoke’ PJSC > Zaporizhstal PJSC > Zaporizhvohnetryv (‘Vohnetryv’) PJSC > ‘Ukrgrafit’ PJSC> Zaporizhzhya Abrasive Plant PJSC > Zaporizhzhya Titanium & Magnesium Combine > Zaporizhtransformator PJSC. The largest amount of fluorine accumulated by the leaves can be attributed to such tree species as: Catalpa bignonioides, Ailanthus altissima, Acer platanoides, Populus nigra, Armeniaca vulgaris, Tilia cordata, Acer pseudoplatanus, Platanus orientalis, which is a distinguishing characteristic of the sanitary protection zones of various enterprises in the city of Zaporizhzhya. Variations of fluorine accumulation in different experimental plots for the same species of woody plants are expressed in quantitative terms. These plants are capable of being the most efficient at purifying the atmospheric air from gaseous fluoride compounds. The highest coefficient of relative accumulation of fluorine in the leaves is found in the following species of woody plants: Catalpa bignonioides, Ailan-thus altissima, Acer platanoides, Populus nigra, Armeniaca vulgaris, Tilia cordata, Acer pseudoplatanus, Platanus orientalis, thus they have a potential to be considered for use as phytoindicators of environmental pollution by the fluorine compounds. The aforementioned coefficient appears to be the lowest in the following species: Morus alba, Elaeagnus angustifolia, Juglans regia and Fraxinus lanceolata.

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