Roasted siderite is characterized by high basicity due to the presence of oxides of calcium and magnesium, which makes it an effective substitute for the acid ores of other deposits for fluxing sintering-machine charges.
The onset sintering and characteristic fusion temperatures of iron-rich coal ashes are presented in Fig. 2. The onset sintering temperatures of SX, XJ, and GZ coal ash gradually increase and varies from 845 °C to 865 °C. Commonly, increase of alkalis and iron contents in coal ash aggravates the sintering of coal ash [17], [18], [19], [20].
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 ...
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.
Based on the mineralogy of siderite, a process of coal-based direct reduction-magnetic separation was developed to beneficiate siderite lump, the process parameters have been optimized, and the ...
Calcite Group. Magnesite-Siderite Series, Rhodochrosite-Siderite Series, Siderite-Smithsonite Series. Crystals typically found as brown to tan rhombohedrons in clusters, faces often curved or composites; more often found as medium to dark brown massive fine-grained material or as massive crystalline material with exposed curved cleavage surfaces.
Sintering is the process of compacting and forming material by heat. Learn more about it here.
Download scientific diagram | XRD pattern of siderite sample. from publication: Coproduction of DRI Powder and Semi-coke from Siderite Ore and Low Rank Coal by Excessive Coal-based Direct ...
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 to obtain sinter with satisfactory metallurgical properties.
sinter ore when partially substituting for coke breeze in sintering. Semi-coke features well-development porous structure and higher reaction activity, which predicts that the sintering speed could be elevated to some extent when employing it as a partial replacement ... developed to beneficiate siderite and produce semi-coke simultaneously ...
Coproduction of DRI Powder and Semi-coke from Siderite Ore and Low Rank Coal by Excessive Coal-based Direct Reduction in Rotary Kiln ... The temperature in the sintering bed was recorded by both ...
Section snippets Sample preparation. Ore samples used in the experiments are carbonate-bearing mixed magnetic concentrates prepared by low-intensity and high-intensity magnetic separation in Donganshan Sintering Plant of An steel Mineral Industry Company in China.
Based on the mineralogy of siderite, a process of coal-based direct reduction-magnetic separation was developed to beneficiate siderite lump, the process parameters have been optimized, and the ...
The raw materials for an integrated steelworks can be classified into four categories, which are iron ores, fluxes, fuels, and reverts. The characteristics of these raw materials strongly affect the metallurgical properties of iron ore sinter and sinter plant...
Siderite is a carbonate mineral of the trigonal crystalline system. It forms mainly in sedimentary and hydrothermal environments and occasionally in igneous …
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 …
Siderite forms as a sedimentary precipitate, in hydrothermal veins, in metamorphic rocks formed from such protoliths, and, rarely, in pegmatites. In sedimentary environments it forms in extensive beds of banded iron formations and as more localized deposits of bog-iron ore. It readily weathers to iron oxides. ASHLAND COUNTY: Siderite is a common …
Iron processing - Ores, Smelting, Refining: Iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments. Most are sedimentary, but many have been changed by weathering, and so their precise origin is difficult to determine. The most widely distributed iron-bearing minerals are oxides, 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).
Learn about the technology used in sintering, the process that converts fine-sized raw materials, including iron ore, limestone, etc. into product for 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 …
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 performance and the obtained agglomerate quality at the minimum number of the carried out experiments, one of the experiment planning …
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 …
Forms a series with rhocochrosite. Common world wide. Link to MinDat Location Data. From the Greek sideros, "iron." Comments: White, metallic arsenopyrite and tan siderite …
The average metal crystallite size in supported metal catalysts usually increases during use. This increase in average metal crystallite size, i.e. decrease in metal surface area, is one of the causes of catalyst deactivation. For some supported metal catalysts the...
Siderite belongs to the calcite group of minerals, a group of related carbonates that are isomorphous with one another. They are similar in many physical properties, and may …
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 sintering batch ...
Siderite is a carbonate mineral of the trigonal crystalline system. It forms mainly in sedimentary and hydrothermal environments and occasionally in igneous pegmatite (pegmatite is an intrusive igneous rock with large, well-developed crystals).
Download Citation | 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 ...
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