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Abstract Vanadium is a toxic metal present in alkaline leachates produced during the weathering of steel slags. Slag leaching can therefore have deleterious effects on local watercourses due to metal toxicity, the effects of the high pH (9–12.5) and rapid carbonation (leading to smothering of benthic communities).
2013-12-2 · The solidified slag was crushed just before ESR and screened to below 20 mesh size powder and preheated at 700–800°C for 5-6 hours in a muffle furnace to remove any moisture present. The amount of slag used in each experiment was 1 kg which gave a slag bath depth of about 50 mm. During ESR, the current, voltage and average
2014-6-16 · introduction. Iron ore pellets are used for the production of hot metal in blast furnaces and DRI/HBI in direct reduction processes. A blast furnace is a shaft furnace, which is charged with iron bearing materials (pellets, sinters and/or lump ore), reducing agents (metallurgical coke) and additives (limestone, quartz, BOF slag).
2013-7-18 · AbstractCoal based direct liquid ironmaking processes, also known as smelting reduction (SR) processes, are now receiving serious consideration in the industry. However, although several processes have reached pilot plant trials, only one, namely Corex, has been commercialised. In all SR processes, most of the iron oxide is reduced in the molten slag phase and foaming is an important …
The present work focuses on mineral reactions and slag formation of LKAB olivine iron ore pellets (MPBO) subjected to reducing conditions in the LKAB experimental blast furnace (EBF). The emphasis is on olivine reactions with surrounding iron oxides. Many factors influence the olivine behaviour.
2014-7-8 · Iron oxides are reduced to metallic iron and higher manganese oxides . are prere- duced to MnO in the solid state by CO in the furnace gas atmosphere. ... the reduction behaviour of GE and Wessels ores, and 50:50 mixture of both will be examined. ... of liquid slag during the reduction of Groote Eylandt ore, Wessels ore and their mixture ...
2013-9-19 · a. reduction of SiO2 to Si from the primary liquid slag above the raceway zone, b. reduction of SiO which originates from coke combustion (SiO2 ash coke) at high temperature, c. reduction SiO2 from slag which is in contact with metal during period between taps, d. reduction SiO2 of coke ash which is submerged in slag and pig iron.
2019-5-26 · The wear rates of different kinds of refractory used in the gasifier are also briefly described. Coal slags, which depend mainly on a high iron oxide content to provide a high slag fluidity during gasification, are quite sensitive to changes in oxygen partial pressure and dissolution of refractory in the slag.
2013-3-26 · • The dynamic swelling of iron ore pellets in a simulated blast furnace atmosphere is considerably more restrained than the corresponding static swelling. Thus, the reduction swelling behaviour of iron ore pellets should preferably be studied DYNAMICALLY under simulated blast furnace conditions to obtain the most realistic results.
2005-10-5 · Fusion Behaviour of Synthetic Aluminothermic Ferro-chrome Slags U. K. MOHANTY and R. C. BEHERA The Department of Metallurgical and Materials Engg., NIT, Rourkela-769 008 India. (Received on January 7, 2003; accepted in ﬁnal form on July 22, 2003) Fusion behaviour of synthetic slags resembling those produced during Alumino-thermic reduction of
The present study investigated the reduction behavior of EAF slag and production of metallic iron by reduction process. The carbon materials, coke and palm char (pyrolyzed via chemical activation) were used as reducing agent composite with EAF slag respectively. ... Influence of Reduction Temperatures on Reduction of FeO-Containing Slag by ...
2018-11-16 · RECOVERY OF PIG IRON FROM COPPER SMELTING SLAG BY REDUCTION SMELTING Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt.% copper and 40 wt.% iron depending upon the initial ore quality and the furnace type. Main components of copper slag are iron oxide and silica.
2017-8-27 · and iron oxide content. Additionally, the thickness of the zone inﬂuenced by ... tage prior reduction. After the pretreatment in rotary kilns, electric arc furnaces are widely applied ... Comparison of the melting behaviour of a synthetic slag with and without premelting. Table I. Design of experiments No. of trial Slag MgO (wt.%) SiO
2016-7-20 · STUDY ON REDUCTION BEHAVIOUR OF MOLYBDENUM TRIOXIDE IN MOLTEN STEEL 463 lower basicity slag contains more SiO 2, which prevents the reaction between MoO 3 and Si, Al. More importantly, MoO 3 is hard to be combined with CaO for low basicity slag, and in that case the volatilization of MoO 3 could result in a lower Mo yield. 3
2009-8-26 · SLAG/REFRACTORY AND METAL/REFRACTORY INTERACTIONS 423 Introduction Columbus Stainless is situated in Middelburg, South Africa and is a subsidiary of Acerinox SA. The steel-making facilities currently consist of a 100-t EAF (with side tapping) two stationary 120-t bottom and top blown converters (one in use while the other is re-lined), ladle
2017-2-6 · SLAG BEHAVIOUR IN LKAB PELLET AT ELEVATED TEMPERATURE Nicklas Eklund, Bo Lindblom [email protected] ... understand pellet behaviour during reduction. As the ... 10-20 mm. Iron ore is stored in one of four bins, coke is stored in a larger bin. A skip transport material to a
behaviour of iron during reduction of , BEHAVIOUR OF IRON DURING REDUCTION OF SLAG OBTAINED , the paper, an analysis of results of the research on be- , removal from the Corex export gas and its... COREQ (COnsolidated criteria for REporting ,
Reduction Behaviour of Olivine Iron Ore Pellets in the Experimental Blast Furnace ... which was attributed to the formation of an increased amount of molten FeO containing slag within the pellet. ... Björn Glaser and Pär G. Jönsson, Characterization of Dust Generated during Mechanical Wear of Partially Reduced Iron Ore Pellets , steel ...
2011-10-11 · The reduction of iron oxides from liquid slag is the fundamental stage of many newly developed, future-oriented technologies of obtaining liquid iron (pig iron), which are referred to as reduction iron smelting processes, whose main distinguishing feature is the use of non-coking coals.
2017-2-6 · BEHAVIOUR OF COATINGS ON OLIVINE FLUXED PELLETS IN BLAST FURNACE REDUCTION Elin Ryösä1,2, Hans Annersten1, Elin Rutqvist2 and Bo Lindblom2 1 Institute of Earth Sciences, Uppsala University, Villavägen 16, SE-752 36 Uppsala, Sweden 2 LKAB Technology & Business Development, Box 952, SE-971 28 Luleå, Sweden Abstract Different coatings on olivine …
2015-9-7 · iron, nickel and cobalt and neutral slag making oxide MgO are neglected, the reduction behaviour of copper and iron from used cupric oxide catalyst can be considered as equilib-rium in the system Cu-Si-Ca-O-C, where the copper, silica, calcium, and oxygen are main catalyst components and the carbon is reductant. The temperature and partial pressure
2013-2-8 · evolution and to track the behaviour of iron (Fe), titanium (Ti) and vanadium (V) during the high temperature hardening-oxidation and pre-reduction process steps of 0, 2 %, or 5 % LD-slag added V bearing titanium iron ore pellets. Any remarkable signs of disintegration of the pellets were not noticed after the hardening or
The potential converting the end-life product into a renewable source and replaced the conventional material found in iron and steelmaking production next tackled the world’s most problematic waste stream. Generally, integrating the waste material becomes wealth only available to certain wastes industries due to high temperature application.