Desulphurization characteristics of ladle furnace slags of a low sulphur steel

In steelmaking, one of the most important parameters for desulphurization is the oxygen potential of the system which can be expressed either by oxygen activity of the steel or by FetO activity of the slag. Removal of sulphur from the steel is enhanced when FetO activity of the slag and thus oxygen activity of the steel decreases. In this paper, ladle furnace slags of a low S steel quality currently produced in Eregli Iron and Steel Works Company (ERDEMIR), Turkey, were studied. Activity coefficients of FetO, gamma(FetO) were calculated with the relation obtained from the literature. The relation between %Decrease a(FetO) and %DeS (measured) was studied. The percentage of sulphur removal was also investigated using the data of the oxygen activity of liquid steel

REDUCTION BEHAVIOR OF IRON IN THE RED MUD

Red mud or bauxite residue contains significant quantities of industrial metals such as Fe, Al, and Ti, as well as rare earth elements such as Sc, Ce, and La. The authors performed a laboratory-scale project dealing with stepwise recovery of valuable elements from two bauxite residues, namely Iranian red mud (IRM) and Turkish red mud (TRM). The first stage involved the recovery of iron which was present in large quantities in red mud. Two different methods were investigated for this purpose: 1) solid state reduction followed by wet magnetic separation and 2) smelting. In the scope of this paper, some results of pyrometallurgical part of this project are presented. According to solid-state reduction experiments, it was found that more excess coal was needed for IRM (35%) than for TRM (15%) to maximize iron reduction. Temperature had significant effect on the reduction process and metallization increased from about 70% to about 95% when the temperature was raised from 1000 to 1200 degrees C. Metallization degree was reported to be slightly higher for IRM (96.2%) than for TRM (94.1%). The results demonstrated that a high degree of iron metallization can be achieved regardless of the chemical and mineralogical composition of the bauxite residue sample

Tenova M&M A4 ad 8'12_Layout 1

Synopsis Drying, calcination, prereduction, and smelting are the main steps in conventional crude ferronickel production. Industrially, these steps are conducted using the rotary kiln-electric arc furnace (RKEF) process. In this paper, calcination characteristics of Sivrihisar laterite ores from the Central Anatolia region are investigated. The extent of elimination of chemically bound water and other volatiles was studied by experiments conducted at various temperatures in the 250-800°C range. Phase changes were examined using X-ray diffractometry. For the particle size used in the study, 300°C was determined to be almost sufficient for complete transformation of goethite to haematite, and 700°C was required for effective elimination of all volatiles in the ore

Correlation between H-1 MRS and memory before and after surgery in mesial temporal lobe epilepsy with hippocampal sclerosis

Purpose: Proton magnetic resonance spectroscopy (H-1 MRS). which can demonstrate neuronal loss and gliosis, may be used as a sensitive tool for lateralization of temporal lobe epilepsy (TLE). Although the correlation between the memory functions and H-1 MRS has been investigated, its predictive value after surgery has not been studied previously. This Study evaluated memory and H-1 MRS values of medically intractable patients with mesial TLE and hippocampal sclerosis (MTLE-HS) before and after selective amygdalohippocampectomy (SAH)

Memory in patients with drug-responsive mesial temporal lobe epilepsy and hippocampal sclerosis

Purpose: Mesial temporal lobe epilepsy associated with hippocampal sclerosis (MTLE-HS) is the most common of the antiepileptic drug (AED)-resistant seizure syndromes that are remediable mostly with surgery, although a small group of patients have benign prognosis with fewer seizures. Material-specific memory impairment is an important feature in these patients and may be related to both the structural abnormality and the frequent seizures. In this study, we investigated the relation between memory deficit and HS by taking seizure frequency into account

9th International Symposium on High-Temperature Metallurgical Processing organized in conjunction with the Annual Meeting and Exhibition, TMS 2018

The proceedings contain 83 papers. The special focus in this conference is on High-Temperature Metallurgical Processing. The topics include: CFD modeling of flow and chemical reactions in a submerged lance copper smelting furnace; numerical simulation of ultrasound-induced cavitation bubbling in a calcium ferrite melt; synthesis of nanocrystalline carbide ceramics via reduction of anion-loaded activated carbon precursors; production of lithium-ion cathode material for automotive batteries using melting casting process; degradation mechanisms of refractories in a bottom blown copper smelting furnace; reaction routes of CaO–FeO–TiO and calcium ferrite–TiO system in continuous heating process; thermodynamic calculations on electric furnace smelting separation of chromium-bearing vanadium titanium magnetite; preparation for high activity degree lime and effect on desulfurization of hot metal pretreatment; pyrometallurgical processing of secondary lead material: An industry overlook; techno-economic analysis of energy recovery from plastic waste; recovery of aluminium and its compounds with hydro and pyrometalurgical methods from non-metallic residue; purification of molten zinc chloride-alkali chloride by cementation reaction; thermodynamic analysis of smelting of spent catalysts for recovery of platinum group metals; preparation of titanium foams through direct electrolysis of the sintered CaO-TiO in molten salt CaCl ; experimental study on oxidative desulfurization and selective reduction of molten copper slag; recycling SiO and AlO from the laterite nickel slag in molten sodium hydroxides; removal of sulfur from copper dross generated by refining lead; recovery of Fe–Cu alloys from copper slag; physicochemical properties of high alumina blast furnace slag; effect of cooling rate on the acidolysis of titania slag