Sinter Plant Operations: Raw Materials | SpringerLink

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 .

The effect of the composition of magnesia flux on the …

Comparison of the experimental results allows us to conclude that the sintering process using the experimental magnesian fluxes exceed those of the Bakal siderite. The use of experienced magnesia fluxes provides an increase in productivity by sintering rate increase and by a step-up of sinter yield.

Improving Thermal Compaction of Siderite Fine Fraction

The temperature conditions for the beginning of liquid-phase sintering of siderite samples with an increase in the amount of peat additives shift towards higher temperatures …

Hydrogen-driven routes to steel from siderite with low CO

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).

Solid-Fuel Combustion in the Sintering of Siderite Ore

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.

Synthesis of magnetite powder from the mixture consisting of siderite

It is known that strongly magnetic magnetite (Fe 3 O 4) can be easily separated from nonmagnetic components of magnetite's quartzite.In contrast, ore is difficult to beneficiate if it contains weakly magnetic siderite (FeCO 3), goethite (FeOOH), or hematite (Fe 2 O 3) as a main iron-bearing mineral.The aim of beneficiation is to remove undesired impurities and to …

XRD pattern of siderite sample. | Download Scientific Diagram

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 ...

(PDF) Characterization of semi-coke generated by coal …

The blast furnace and direct reduction processes have been the major iron production routes for various iron ores (i.e. goethite, hematite, magnetite, maghemite, siderite, etc.) in the past few ...

(PDF) Iron ore sintering. Part 1. Theory and practice of the sintering

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 ...

Để xác định hàm lượng FeCO3 trong quặng xiđerit, người ta …

Để xác định hàm lượng FeCO3 trong quặng xiđerit, người ta làm như sau: Cân 0,6 gam mẫu quặng, chế hóa nó theo một quy trình hợp lí, thu được FeSO4 trong môi trường H2SO4 loãng. Chuẩn độ dung dịch thu được bằng dung dịch chuẩn KMnO4 0,025M thì dùng vừa hết 25,2 ml. Phần trăm theo khối lượng của FeCO3 là

Mechanism of high temperature reduction on iron carbide …

The carburization roasting followed by magnetic separation is a feasible method to utilize low-grade siderite ore. In order to enhance the carburization efficiency and separation efficiency, high temperature reduction was carried out, and its mechanism was demonstrated by measuring carburization index, phase change, and microstructure under a carbon-sulfur …

Study on Basic Sintering Properties of Siderite

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 …

Development of the Coking, Sintering, and Blast-Furnace

The main tasks of coking, sintering, and ironmaking processes at Severstal in 2017–2022 are specified. The operation of the production complex until 2020 as part of "traditional" units of classical designs is described. The assimilation of new facilities based on an essentially different technology in 2020 to 2022 is shown. The results of blast-furnace …

Sintering of Bakal siderite ore | Steel in Translation

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 …

Volume 29, Issue 9 | Journal of Iron and Steel Research

Mechanism of high temperature reduction on iron carbide preparation with low-grade siderite. Dong Chen; Ya-nan Lv; Wei-ang Ying; ... Significant influence of self-possessed moisture of limonitic nickel laterite on sintering performance and its action mechanism. Yu-xiao Xue; De-qing Zhu; Xue-zhong Huang; Original Paper Open access 01 January ...

Sintering of Bakal siderite ore

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 ...

Chapter Advances in Sintering of Iron Ores and …

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, ...

Evaluating the Thermal Efficiency of a Shaft Furnace for …

Solid phase sintering and melting of the materials are limited to the cooling zones and proceed to no more than take place more than 1–3% completion. The yield of roasted siderite is no greater than 47.67%. Roasting of the siderite occurs with the evolution of a small amount of heat from the oxidation of oxides of iron and manganese.

Sintering behaviors of siderite

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 ...

Studies on the Removal of Harmful Elements During Sintering of Siderite

Addition of small amounts of calcium and magnesium chlorides to the sinter charge of siderite iron ore, to minimise the percentages of harmful elements such as Pb, Zn, Cu, Sb and As was successfully performed. Remarkable removal of these elements was achieved during sintering. The produced sinter acquired good physical characters, like Iso ...

Characterization of semi-coke generated by coal-based …

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 …

Sintering Trajectories: Description on How Density, …

Sintering is a mainstay production step in forming metal, ceramic, polymer, and composite components from particles. Since the 1940s, the sintering process is treated using a matrix of mathematical relationships that include at least seven atomic transport mechanisms, several options on powder characteristics, and three pore–grain morphology options. The interplay of …

Iron Ores and Iron Oxide Materials

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 …

Studies on the Removal of Harmful Elements During …

Addition of small amounts of calcium and magnesium chlorides to the sinter charge of siderite iron ore, to minimise the percentages of harmful elements such as Pb, Zn, Cu, Sb …

Optimization of Siderite Ore Sintering Operation Conditions

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 …

Sintering behaviors of siderite

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 …

Xianlin ZHOU | Lecturer | PhD | Wuhan University …

Sintering accounts for about 50% of the total NOx emissions of the iron and steel industry. ... In order to provide a better theoretical foundation for utilisation of Xinjiang siderite resources ...

Modification of magnetic properties of siderite ore by …

The modification of the magnetic properties of mineral components in siderite ores by microwave heating results in increasing the efficiency of their magnetic separation.

Iron processing

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) …

Optimization of Siderite Ore Sintering Operation Conditions …

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 ...

Strengthening Granulating and Sintering Performance of

MCI contains 22% siderite, and FeCO 3 in the siderite will be decomposed during sintering, as shown in Equation (4). FeCO 3 usually starts to decompose at about 400 °C, and completely decompose at about 560 °C, generating FeO and CO 2 [23,24]. While increasing fuel consumption, the escape of carbon dioxide also causes an explosion and serious ...

A novel blending principle and optimization model for low …

Semantic Scholar extracted view of "A novel blending principle and optimization model for low-carbon and low-cost sintering in ironmaking process" by Xiao-xian Huang et al. ... The carburization roasting treatment followed by the magnetic separation is an effective way to utilize low-grade siderite, in which the sodium sulfate additive plays an ...