— The current centrifugal concentrators do not continuously concentrate heavy minerals of large mass weight—for example, in the processing of iron oxides. A cyclone centrifugal separator is a new type …
— The efficient development and utilization of high-phosphorus oolitic hematite is of great strategic significance for the sustainable supply of iron-ore resources in China. In this paper, the mechanism of high-temperature pretreatment for enhancing the effect of iron enrichment and dephosphorization in the magnetization roasting-leaching process was …
— The technological parameters of sinter ore smelting at the pilot Romelt furnace of the Novolipetsk Iron and Steel Works are given. The problems occurring during the processing of hematite ore by the smelting reduction Romelt process are shown. A modification of the technology is proposed, which involves the Romelt duplex process …
— In this work, the effects of Si-bearing minerals on hematite conversion during reductive Bayer digestion were investigated by studying the reaction kinetics and …
— To investigate the effect of simultaneous change in particle size of raw materials (including ore, reductant, and dephosphorization agent) on the direct reduction process of high-phosphorus oolitic hematite, the experimental research of method with direct reduction and magnetic separation was conducted to investigate the effect of …
— The degradation of 1,1,2-TCA using six naturally occurring iron minerals, both in the presence and absence of persulfate, was investigated (Fig. 1).In the absence of persulfate, pyrite (FeS 2) achieved a 1,1,2-TCA removal efficiency of 36% within 120 hours, whereas it was less than 20% for magnetite (Fe 3 O 4), ilmenite (FeTiO 3), hematite (Fe …
— The mass changes of sintered products with different MgO contents during reduction process at 550 °C were measured by thermogravimetric method to understand the effect of MgO content on low ...
— The significant effect of MgO in inhibiting the reduction swelling of iron ore pellets has been widely recognized. The swelling behaviors of pellets during the …
— International Journal of Mineral Processing. Volume 152, 10 July 2016, Pages 1-6. Effect of carbonate minerals on quartz flotation behavior under conditions of reverse anionic flotation of iron ores ... and fatty acids as collectors when pH was 5 to 7 showed that the floatability of siderite was better and that of other minerals (i.e., hematite ...
DOI: 10.1016/J.HYDROMET.2019.105126 Corpus ID: 202069247; Effects of Si-bearing minerals on the conversion of hematite into magnetite during reductive Bayer digestion @article{Wang2019EffectsOS, title={Effects of Si-bearing minerals on the conversion of hematite into magnetite during reductive Bayer digestion}, author={Yi-lin Wang and Liao …
— By eliminating these impurities, beneficiation seeks to raise the iron content above 60% Fe, preparing the ore for iron and steel production; low-grade iron ore …
agglomeration effect of hematite was. Therefore, the beneficial effect could be achieved by adjusting the particle sizes of particles. ... The application of "magnetic aggregation" in mineral processing can not only reduce the consumption of flotation reagents but also improve the flotation efficiency (Li et al., 2017; Yin et al.,2019; Yue et ...
— Fig. 1 illustrates the effect of hematite on gold dissolution at varied concentrations. Parallel leaching of gold was conducted with the addition of varied amounts of albite, which was a typical gangue mineral in gold ores. The presence of albite had only very marginal effect on gold dissolution due to slight site blockage.
— This leads to one of the main factors involved in the current test work was to examine the effects of mineralogy and particle size on the magnetic behaviour of a wide range of iron-containing minerals. ... (2017) used a flow rate of 7 L/min for processing hematite with an average particle size of 25 µm using an Eriez model L4 machine, ...
— The present work on iron ores from the Singhbhum-Bonai-Keonjhar iron ore belt of the eastern part of India is focused on linking mineralogical attributes, petrological …
— Magnetite (Fe 3 O 4) is a common iron ore mineral in iron ore deposits of metasedimentary and magmatic origin.Magnetite has an inverse spinel structure and is partly altered in near-surface environments to hematite or kenomagnetite (Waychunas, 1991).Hematite is commonly thought to form from oxidation of magnetite in the near …
— Effects of Metallic Content on Sinter Cooling Rates. Figure 2 shows the temperature readings registered by thermocouples during sintering and cooling at low vacuum (4-in. Hg or 13.5 kPa) and high vacuum (6-in. Hg or 20.1 kPa) condition. It can be seen that high metallic iron feed (HI) sintering test had lower peak temperature at upper …
— Mineralogical studies have established that the main iron-bearing mineral is hematite, which contains 69.02 to 70.35% of iron distributed in the ore.
process is suggested considering suppressed the quartz attack and boehmite reversion. Keywords: Bauxite mineralogy, reactive silica, raw materials consumption model, digestion process. 1. Introduction At present, imported bauxites are widely used by alumina refineries in China, mainly from Guinea, Australia, Indonesia, Ghana, Vietnam and Brazil.
— Depletion of the mineral ore base of high-grade quality and easily beneficiated iron ores has led to the need for improvement in the processing of low-grade and …
A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried out to provide a better understanding of the mineralogy, leaching process chemistry and effect of operating conditions on nickel recovery, residue properties and scaling.
— 1.. IntroductionThe increase of industrial interest in the direct reduction of hematite ores using gaseous reductants arises from the several technical advantages that this method offers over the conventional blast furnace process (Pineau et al., 2006, Sastri et al., 1982).Although hydrogen reduction plays an important role in the preparation of …
— Based on process mineralogical study of an oolitic hematite ore in SW China, the texture and structure of the ores, the occurrence of iron minerals and the dissemination of them are determined in ...
— Many efforts have been made to determine the efficiency, performance, and accuracy of the sorting process in mining/mineral processing industry (Udoudo, 2010). Moreover, Fitzpatrick (Fitzpatrick et al., 2015) investigated the relationship between particle proximity and unintentional co–ejections with CFD–DEM modelling and successfully ...
— The effects of mineralogy on the preconcentration of two very different Ni laterite types of ores processed on an industrial scale will now be discussed. ... and iron and manganese oxides where the dominant minerals are goethite, limonite and hematite. Of these deposits, 61% of the total ore tonnage is associated with the Fe oxide deposits …
The effects of carbonate minerals (dolomite and siderite) on the flotation of hematite using sodium oleate as a collector were investigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta-potential measurements, Fourier transform infrared (FTIR) spectroscopic studies, and X-ray photoelectron …
— The mineral processing at RG AS includes autogenous (AG) milling, wet low-intensity magnetic separation (LIMS) followed by wet high-intensity magnetic separation (WHIMS). ... Understanding the effect of mineralogy, geochemistry, lithology, and alteration on the comminution processes are valuable for processing any ore. ... Granular …
— Obtaining high-quality concentrates with high iron content and low content of impurities from low-grade iron ores requires the maximum possible liberation of valuable minerals and a high accuracy of separating features (difference in density, magnetic …
— The effect of alumina occurrence form on the metallurgical properties of both hematite and magnetite pellets was investigated at the same Al2O3 level of 2 wt.%, including reduction index (RI), low-temperature reduction disintegration index (RDI), reduction swelling index (RSI), and high-temperature softening–dripping performance. …
— The results show that the magnetic susceptibility and magnetism satn. of hematite ore can be highly increased due to the selective conversion of hematite and siderite into magnetite caused by …
