The chemical composition of the sinter obtained without Bakal siderite concentrate in the batch is calculated. The influence of Bakal siderite in the batch on the sinter composition is assessed.

Abstract This paper shows that the existing siderite ore preparation techniques do not allow achieving high blast-furnace smelting levels as compared with using black iron ore concentrates with a high iron content. To make blast-furnace smelting more efficient, it is necessary to use the metallized product made by regenerative siderite ore roasting. The …

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 ...

Using the patterns of the siderite compaction kinetics in an oxidizing environment in an isospeed heating mode, seven regime periods are identified: drying, heating, carbonate decomposition, oxidation of ferrous oxide, solid-phase reactions, re-oxidation of magnetite and …

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 …

78 siderite end members has been used as main indicator for the formation of mixed carbonates 79 [17, 19, 21]. Using the position shifts of the most prominent reflections, molar ratios of Ca and ...

The industrial practice is to blend siderite with other high grade ores in the sinter plant (Chun et al., 2015, Ponomar et al., 2018, Sun et al., 2019, Zhu et al., 2020). During the sintering process as shown in Fig. 1, siderite is converted to hematite (Fe 2 O 3) in a rotary kiln under an air atmosphere according to Eq. (1).

Hu Hong, Song Chunyan, Hu Guiyuan. Study on Basic Sintering Properties of Siderite[J]. Multipurpose Utilization of Mineral Resources, 2018, (6): 85-89. doi: 10.3969/j.issn.1000 …

The results show that the siderite sintering with a small amount of magnetite can obtain good sinter varieties, when the coke ratio is 4.8%-5.7%. Basicity has little influence on …

Solid wastes derived from metallurgical industries pose a significant threat to environment. The utilization and disposal of these solid wastes are the major concern in the world. Semi-coke generated in coal-based direct reduction process of iron ore is a by-product and its suitable utilization is not available so far. In order to handle it properly, the characteristics of …

The roasting of siderite ores in shaft furnaces is characterized by significant nonuniformity of the temperature and velocity fields at all levels of the charge.

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, …

CO 2 hydrogenation reduction was introduced in steelmaking from siderite minerals to further reduce the CO 2 emissions. Based on thermodynamic analysis results, we provided …

Siderite slime adheres to quartz and hematite surfaces and makes them exhibit floatability that is similar to that of siderite [6]. ... (Tianjin Fuchen Inc., AR) was used as activator, and KS-III (Donganshan Sintering Plant, LP) was used as collector. Several dispersants were as follows: MS-2 (85% citric acid (Tianjin Kermil Inc., AR) and 15% ...

The chemical composition of the sinter obtained without Bakal siderite concentrate in the batch is calculated. The influence of Bakal siderite in the batch on the sinter composition is assessed. The sinter content in the blast-furnace batch, the MgO content in the slag, the slag yield, and the slag basicity are plotted against the content of siderite concentrate in the …

This book provides the multidisciplinary reading audience with a comprehensive state-of-the-art overview of research and innovations in the relationship between iron ores and iron ore materials. The book covers industrial sectors dealing with exploration and processing of iron ores as well as with advanced applications for iron ore materials and therefore entails a …

Finally, comprehensively considering the sinter strength, yield, productivity and sintering time, the recommended equivalent methane concentration at high charcoal proportion was 0.5% where the ...

Sintering. Iron ore sintering consists of heating a layer of fines until partial melting occurs and individual ore particles fuse together. For this purpose, a traveling-grate machine is used, and the burning of fine coke (known as coke breeze) within the ore generates the necessary heat.Before being delivered to the sinter machine, the ore mixture is moistened to cause fine particles to …

Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. Compared with pellets, production of sinter is cheaper, and compared with lump ore, fluxed sinter is often more reducible with better softening characteristics. Iron ore sinter typically constitutes more than 70% of the blast ...

With Xinjiang siderite as the main raw material, 500mm deep bed sintering test was carried out under the laboratory conditions. The sintering tests with different sinter basicity, solid fuel ratio ...

It is shown that siderite may only be used as a combined raw material containing iron and magnesium. ... It is expedient to add concentrate of calcined siderite ore in the form of magnesia flux and sintering intensifier in a sintered charge instead of part of the ore during sinter production in different sinter plants. Two problems are resolved ...

Ash sintering and melting behaviors are conventionally evaluated by onset sintering temperature (T os) and characteristic ash fusion temperatures (AFTs), ... (Fe 3 O 4), and siderite (FeCO 3). The different iron species can present varied sintering and fusion events, such as pyrite and pyrrhotite ...

The melting point of silica is 1750 °C, which makes the formation of bonding melt in sintering process difficult. A better option to adjust the SiO 2 level in sinter is by using serpentine or olivine, unless they are not available. Table 1.2 shows the chemical composition of fluxes for iron ore sintering .

Carbonate ores based on siderite - FeCO 3 (48.30% Fe) can also be processed, as well as silicate ores (leptochlorites), e.g. chamosite. The highest natural iron ... sintering are pretreated in the granulation process. The values of specific surface of the granulated materials should not be lower than 2000 cm2.g 1, ...

Research was сarried out on a pilot plant on sintering of various size siderite ore and limonite taken in various ratios. To study impact of a number of process factors on the sintering process ...

With these equations the effect of the ore size, siderite ore and limonite ratio, solid fuel consumption, sintered layer height on the agglomeration unit performance and the …

With the fast development of Chinese iron and steel industry, the high iron grade ores and easy-processing iron ores are consumed rapidly. Consequently, a considerable attention has been paid to the exploitation and utilization of refractory iron ores [1, 2].Siderite containing FeCO 3 is a typical refractory iron resource, which deposits in China totaling to nearly 1.83 …

The scheme of preparation of high-magnesium siderite to metallurgical production by methods of pyro- and hydrometallurgy, which allows to obtain magnesian iron ore …

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 …

Siderite is a member of calcite group minerals, which have a similar structure and form several solid-solution series. The miscibility of the calcite group members is limited though. Of the several possible members of the solid-solution series associated with siderite (FeCO 3), only the smithsonite (ZnCO 3), magnesite (MgCO 3) and rhodochrosite (MnCO 3) varieties are …