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 ...

 — 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 methods was …

 — May Concentrate Iron ore, as a refractory iron concentrate, deteriorates the permeability of the sintered layer during the sintering process due to its fine particle size and poor granulating performance. Therefore, it cannot be widely used in iron ore sintering. In this study, the strengthening granulation of May Concentrate Iron ore using pre …

The catalytic denitrification of sintered ore, the effect of double-layer ignition sintering process on the emission reduction in nitrogen oxides, and the impact on the quality of sintered 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. On the basis of derivatographic data, kinetic equations are written for the high-temperature combustion …

 — MS-2, a novel dispersant, was employed to improve the innovative dispersion flotation of carbonate-bearing refractory iron ore.High quality iron concentrates (TFe grade of 67.04% and recovery of 75.57%) were achieved by the locked-cycle flotation tests and analyzed by X-ray diffraction and scanning electron microscopy to investigate the …

Samples of siderite ore and limonite (size classes 0–16, 0–12, and 0–8 mm) are prepared in order to refine the sintering of siderite order and study the influence of various parameters on the sintering pro cess and the final sinter quality. Roasted siderite ore (size class 0–8 mm) is also used. Table 1 presents the

 — Table of Contents The authors investigate the influence of the basicity index CaO/SiO2 on the sintering properties of hematite ore mixtures. The experimentation was performed with three different mixtures of ores from Tazadit, Nimba, Mano-River, Itabira, Marcona, Goa, Mapawa and Cassinga. Increasing the basicity index CaO/SiO2 between …

 — Semantic Scholar extracted view of "An efficient process to upgrade siderite ore by pre oxidation-magnetization roasting-magnetic separation-acid leaching" by Dingzhen Wang et al. ... as a refractory iron concentrate, deteriorates the permeability of the sintered layer during the sintering process due to its fine particle size and poor ...

To do this, a charge consisting of siderite ore and brown iron ore is subjected to sintering to obtain an agglomerate. The mechanism of reactions occurring in the agglomerated layer …

Nitrogen oxides in iron ore sintering2.1. Emission characteristics. It has been determined that it is almost impossible to replicate technologies of low NOx combustion from other industries for iron ore sintering. Sintering is distinct from a coal-fired furnace, as it involves the three-way coexistence of gas, solids, and liquids.

 — 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 …

 — Abstract. 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.

 — 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.

The consumption of siderite ores of the Bakalskoye deposit can be increased by replacing some of the relatively high-magnesia Bakalsky concentrate (a mixture of roasted siderite …

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 important approach to preparing such ore for blast-furnace use [7–11]. The method of solid-fuel preparation has considerable influence on the sintering ...

 — 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 isomorphous minerals, the calcite group carbonates, which share similar physical properties, and rhombohedral crystal form. ...

 — Mining operations usually provide ore of varying characteristics. At the Donganshan Sintering Plant, the ore is a low-grade, complex, hard-to-separate carbonate containing iron ore, and a two-step flotation circuit was previously developed to overcome the negative impact of the carbonates on the reverse flotation process. However, with …

 — Siderite ore (FeCO3) is an important iron ore resource that is widely distributed around the world. However, it is difficult to process using conventional methods owing to the low iron grade, easy ...

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 ...

Meanwhile, C/Fe mass ratio was elevated to 2.50 in the direct reduction of siderite to generate semi-coke as by-product, which contained 76.11% fixed carbon. Based on the characterization of the semi-coke, it can be used as solid fuel in the iron ore sintering to replace coke breeze and cut production cost.

 — 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 …

 — 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 …

 — There is 32. 45% Fe in iron ore from Donganshan Sintering Plant. The ore has the characteristics of poor iron and high silicon, main iron ore is hematite, main gangue mineral is quartz, there is ...

 — Fig. 1 illustrates the mineralogical characteristics of siderite ore. It can be seen that the siderite was the dominate mineral in the raw ore. The calcium and magnesium existed in dolomite (CaMg(CO 3) 2) and ankerite (Ca(Mg,Fe) (CO 3) 2) particles with size of 100–300 microns.The distribution of potassium and aluminum were consisted with the …

 — Siderite (FeCO3): Siderite is a carbonate iron ore mineral that is typically brownish-yellow to grayish-white in color. It often forms as a result of hydrothermal processes or weathering of other iron-bearing minerals. ... such as pelletization or sintering, to create iron ore pellets or sinter, which are used in blast furnaces to produce iron ...

 — 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 ...

 — 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 ...

 — The results show that final reduced iron powder assaying 91.56% Fe and 94.66% metallization degree was obtained at an iron recovery of 88.46% under the following conditions: siderite lump ore ...

There exist complex chemical reactions and phase transition processes—melting and solidification—in the iron ore sintering process. This will result in bed shrinkage and has an important impact on the sintering process and sinter properties. Numerical simulation was carried out in this paper, and it is based on the porous medium and double-energy …