No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
the iron ore sintering process. Calcium ferrite formed in the high-temperature sintering zone has an impact on NOx emission, catalyzing NOx decomposition and reducing its emission level [29,31–34]. NOx emissions decreased when a specially prepared coke containing CeO2 was used during the iron ore sintering process [5]. The addition of Fe3O4 ...
A method of preparing siderite ore that expands its applicability in sintering is considered. The results are of great practical importance, since they permit optimal preparation of such ore so as ...
Two technologies are considered for the preparation of solid fuel used in sintering: crushing with portions of roasted siderite ore whose strength is less than that of the fuel; or …
Kasai E, Aono T, Tomita Y, Takasaki M, Shiraishi N, Kitano S (2001) Macroscopic behavior of dioxins in iron ore sintering plants. ISIJ Int 41(1):86–92. Article Google Scholar Mou J-L (1998) A study of in-plant de-NOx and de-SOx in the iron ore sintering process.
With increasingly stringent environmental protection policies, cost-effective and value-added treatment of massive lead–zinc waste rock (LZWR) generated from the preconcentration process has attracted substantial attention. A type of dolomitic LZWR with 18 wt.% MgO, 27 wt.% CaO, 0.29 wt.% Zn and 1.43 wt.% S was used as a replacement flux in …
In this study, the pelletization characteristics after calcination of the Malatya Hekimhan- Deveci siderite ore were investigated and the productivity of pellets with higher strength than that ...
In the present study, calcination properties of Hekimhan-Deveci siderite (FeCO3) ore and the effect of calcination process before the pelletization on strength of pellet were …
Using biomass for partial replacement of coke breeze in iron-ore sintering process is an effective technique as a countermeasure against global warming. However, the sinter strength would be weakened due to the damaged heat pattern at high biomass proportion. ... Coproduction of DRI powder and semi-coke from siderite ore and low rank coal by ...
In order to provide a better theoretical foundation for utilisation of Xinjiang siderite resources in China, its thermal decomposition behaviour was studied in neutral and oxidising atmospheres by employing thermodynamics analysis, chemical titration, thermogravimetric, and X-ray diffraction means.
The microwave conditions were determined as 900 W at 3 min. In 3 min, the temperature of the siderite ore increased up to 1100°C and 32.14% weight loss for the sample was achieved. Keywords: siderite ore, furnace, microwave heating, calcination, pelletizing 1. Introduction 1.1.
5.1 Sintering. Iron ore sintering plants are associated with the manufacture of iron and steel, often in integrated steel mills. The sintering process is a pretreatment step in the production of iron, where fine particles of iron ores and in some plants, also secondary iron oxide wastes (collected dusts, mill scale), are agglomerated by combustion.
In this paper, an integrated process was developed to beneficiate low grade siderite ore and upgrade inferior coal simultaneously to yield DRI powder and semi-coke.
The iron ore sintering contributes to more than half of worldwide steel production's total NO x and SO 2 emissions. Globally, a considerable output of iron ore sinter is achieved through sintering processes. ... These CFs promoters are more efficient than native iron ores, including hematite, magnetite, and siderite. Nevertheless, the ...
Two technologies are considered for the preparation of solid fuel used in sintering: crushing with portions of roasted siderite ore whose strength is less than that of the fuel; or crushing of the fuel alone and subsequent mixing with the ore portions.
Carrying out column leaching of a similar ore after sintering, without roasting, for 100 days made it possible to extract only 62.7% nickel and 55.6% cobalt, which is a rather low indicator (Quaicoe et al., 2014). 2. Materials and methods. Ore samples were averaged, followed by crushing and grinding. During sintering, binders were added to the ...
The granulation of iron ore is an important process in the iron ore sintering. It strongly affects the permeability of sinter bed and then affects the productivity and properties of produced sinter such as strength and reducibility. The granulation ability of limonite ores was poor; they should be used with high granulation ability iron ores to ...
The charge sintering rate containing 60% siderite ore and 40% brown iron ore with a particle size of 16–0 mm (experiment No. 8, Table 7) was 25.1 mm/min, while when the ore size was reduced to 8–0 mm and maintaining their ratio, the speed decreased to 24.4 mm/min. With an increase in the ore content in the charge from 60 to 80% at the same ...
Abstract. Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. Owing to the depleting reserves of traditional high grade iron ore, there have been considerable changes in iron ore resources available throughout the world, especially in steel mills in East Asia.
A new approach is proposed to improve the strength of the vanadium titanium magnetite (VTM) sinter by adding preformed calcium ferrite (CF) to partially substitute the CaO. The effects of the sintering temperature, oxygen partial pressure (pO 2 ), heating time, and substitution ratio of preformed CF on the mineralogy of the VTM sinter are examined through tablet sintering. The …
Utilisation of semi-coke as by-product derived from coal-based direct reduction process in iron ore sintering. Y. H. Luo [email protected], D. Q. Zhu, […], J. Pan, and X. L. Zhou +1-1 View all authors ... Pan J.: 'A study of beneficiation of siderite by direct reduction-magnetic separation process', Proc. 5th Int. Symp. on 'High ...
Siderite is both an iron ore and gangue mineral. Its principal economic value lies in its high iron content and the absence of process contaminants such as sulfur or phosphorous. It is part of a large group of …
The authors investigate the influence of the basicity index CaO/SiO2 on the sintering properties of hematite ore mixtures. The experimentation was performed 911 Metallurgist is a trusted resource for practical insights, solutions, and support in mineral processing engineering, helping industry professionals succeed with proven expertise ...
Sintering is a process by which a mixture of iron ores, fl uxes and coke is agglomerated in a sinter plant to manufacture a sinter product of a suitable composition, quality and granulometry to be ...
phobicity/hydrophilicity, etc., impacts the sintering perfor-mance and sinter qualities to a large extent [–61]. During sintering, water plays a key role, as a binder to granulate the iron ore mix. It permeates through ore particles under the inuence of capillary force and reaches the surface and then migrates further into ore particles [6].
From the perspective of beneficiation of siderite, with an increase in C/Fe mass ratio, the changes of metallization degree of roasted ore, iron grade and recovery of wet magnetic sepa- ration are ...
Sintering accounts for about 50% of the total NOx emissions of the iron and steel industry. NOx emissions from the sintering process can be simulated using the emissions from coke combustion. However, the generation and emission law for NOx burning in the sintering process of pulverized coal is still not clear. The formation characteristics of NOx during coal …
iron ore resources, siderite ore is abundant in China with proven reserve of 1.83 billion tons, occupying 14% of total iron ore reserves.1,2) However, siderite is refractory to ben- ... it can be used as solid fuel in the iron ore sintering to replace coke breeze and cut production cost. The integrated process provides an attractive way to ...
In Russia and elsewhere, siderite ore is used in roasted form or as sinter. After roasting in shaft fur-naces, the strength of the siderite ore is decreased [1‒6]. Therefore, sintering is an …
Iron ore sintering entails high energy consumption and also produces significant pollution, responsible for the highest share of CO 2 emission, as well as SO 2 and NOx emissions, in the iron and steel production processes. 5 The SO 2 and NO X emissions from this process account for ∼70% and ∼40% of the total iron and steel industry emissions, …
It is produced by high-temperature sintering of fine iron ore, iron ore concentrates and other ferriferous materials (e.g. secondary materials from iron and ... Siderite ore Siderite FeCO 3 Gray 3.9 48.3 Chamosite ore Chamosite Fe 4Al (Si 3AlO 10). (OH) 6.nH 2O Green Black 3.03–3.19 38.0 Table 1. Classification of iron ores [2]. 2
