US2670946A - Apparatus for magnetic roasting - Google Patents

ore fuel Prior art date 1950-10-31239000012159 carrier gas Substances description 31; XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances — — — — — US193249A Apparatus for magnetic roasting US2670946A (en) ()

Recovery and separation of iron from iron ore using

Title: Recovery and separation of iron from iron ore using innovative fluidized magnetization roasting and magnetic separation Author: J. Yu and Y. Han and Y. Li and P. Gao

Beneficiation of Iron Ore - Mineral Processing & Metallurgy

24-05-2022 · Beneficiation of Iron Ore and the treatment of magnetic iron taconites, stage grinding and wet magnetic separation is standard also applies to iron ores of the non-magnetic type which after a reducing roast are amenable to magnetic separation. All such plants are large tonnage operations treating up to 50,000 tons per day and ultimately requiring

Roasting in Metallurgy - Mineral Processing & Metallurgy

31-10-2022 · Croasdale found, from experiments on a number of ores, that from 80 to 99 per cent, of the gold contained in them could be volatilised by roasting with salt. Cooling Roasted Ore. This was formerly effected by spreading the roasted ore on sheet-iron floors, and either leaving it for twenty-four hours, or damping it down by a hose-pipe.

Bog iron - Wikipedia

Bog iron is a form of impure iron deposit that develops in bogs or swamps by the chemical or biochemical oxidation of iron carried in solution. In general, bog ores consist primarily of iron oxyhydroxides, commonly goethite (FeO(OH)).. Iron-bearing groundwater typically emerges as a spring oxidized to ferric hydroxide upon encountering the oxidizing environment of the surface.

Effect of reduction roasting by using bio-char derived

Beneficiation of Malaysian iron ore is becoming necessary as iron resources are depleting. However, the upgrading process is challenging because of the weak magnetic properties of Malaysian iron ore. In this study, bio-char derived from oil palm empty fruit bunch (EFB) was utilized as an energy source for reduction roasting. Mixtures of Malaysian iron ore and the


Control of magnetizing roasting. Magnetizing roasting is a process in which hematite ore, Fe 2O 3, is deoxidized by carbon to yield magnetite Fe 3O 4, for magnetic concentration. The magnetite can be measured with a Satmagan. Control of oxidizing roasting of carbonate ores. The amount of magnetite in the process can be measured with a Satmagan.

Metallurgy: Definition, Principle, Process and Solved

17-11-2022 · The Magnetic separation method is used when either the ore or the impurities associated with it are magnetic in nature. Example: Chromite ( 2 O 3) -A an ore of chromium. Magnetite (Fe 3 O 4) → an ore of iron. Ques. What is the role of depressants in the froth floatation process of dressing of ores? 2 marks. Ans.


due to the similar behavior of Mn and Fe. Rao et al. [4] reported, that in reduction roasting of low- grade manganese ore followed by magnetic separation, 60 % of phosphorus can also be removed. After these tests Outotec has also continued studies into the pre-treatment of different manganese ores.


Ezhov, A. M. and Shvaljov, Y. B. (2022) "Dry Magnetic Separation of Iron Ore of the Bakchar Deposit," Procedia Chemistry, 15, pp. 160–166. doi:(2022) "Chemical and mineral transformation of a low grade goethite ore by dehydroxylation, reduction roasting and magnetic separation," Minerals Engineering, 60, pp. 14–22. doi:

Magnetising Roasting Of Lean Iron Ores By Rotary Kiln

Rotary kiln (metallurgy chemical) kiln is used for magnetic roasting of iron ore and oxidizing roasting of chrome and nickel in the steel factory. Rotary kiln is used for baking high-alumina mine in the refractory material factory.

iron ore Archives - Mineral Processing & Metallurgy

Beneficiation of Iron Ore and the treatment of magnetic iron taconites, stage grinding and wet magnetic separation is standard practice. This also applies to iron ores of the non-magnetic type which after a reducing roast are amenable to magnetic separation. All such plants are large tonnage operations treating up to 50,000 tons per day and .


1. M ul ti-stage suspension magnetizing roasting-magnetic separation system device and method for refractory iron ore., 15/991690. 2.,, ZL ; 3.,, ZL ; 4.

Roasting Followed by Magnetic Separation: A Process for

Titano-magnetite is an ore of iron and titanium, and is highly magnetic. Magnetite and ilmenite are two major minerals. Ilmenite exhibits various textural dispositions. Widmanstatten and granular exsolution textures are important ones exhibited by the constituent mineral. Reduction roasting followed by two-stage LIMS gives a magnetic concentrate of % Fe at a yield of

Siderite - Wikipedia

Spathic iron ore. Although spathic (carbonate) iron ores, such as siderite, have been economically important for steel production, they are far from ideal as an Their hydrothermal mineralisation tends to form them as small ore lenses, often following steeply dipping bedding planes. This makes them not amenable to opencast working, and increases the cost of

Davis Tube Tester - 911Metallurgist

The tube test investigations were conducted on magnetite ores only, including a variety of roasted iron ores and a few magnetic taconites. All were pulverized to approximately normal size distributions with top particle sizes of 44 to 149 microns (325 to 100 mesh) in single stage operations with either a pebble mill or a Davis sample grinder.

——() -

Shilu iron ore is a typical complex refractory iron ore with fine crystal size and complex embedding relationship between,the process of pre-concentration desulfurization-suspension magnetization roasting-magnetic separation has been developed.

Characteristics of magnetic roasting and analysis of phase

Abstract: Magnetic roasting accompanied by different temperatures, roasting time and samples' particles were carried out for the beneficiation of an oolitic iron ore in west of Hubei Province. Characteristics of magnetic roasting, iron minerals' phase transformation and their composition variation on oolitic iron ore were investigated using X-ray diffraction(XRD)

Magnetizing Reduction and Magnetic Separation Studies on

Magnetic separation is most used to separate natural magnetic iron ore (magnetite) from a variety of less magnetic or nonmagnetic material [7]. Magnetizing reduction is one of the most effective unit operations in the treatment of low-grade iron ores specially those which are poorly responsive to conventional beneficiation techniques such as froth flotation, gravity separation

Digestion of Alumina from Non-Magnetic Material Obtained

The separation of iron via reductive roasting of bauxite ore with sodium salts followed by magnetic separation improves alumina digestion in the Bayer process. When the alumina-bearing material in bauxite ore is converted into non-magnetic material, the digestion temperature decreases significantly from 280 °C to 240 °C with a nearly 99% relative digestion ratio of

- -

15-12-2022 · (19) Bingbing Liu*, et al. Separation and recovery of iron and manganese from high-iron manganese oxide ores by reduction roasting and magnetic separation technique. Separation Science and Technology, 2022, 52 (7): 1321-1332.

Effect of Coal Type on the Reduction and Magnetic

from oolitic iron ore in some –5) This technology combines metallurgy and mineral processing technology together, in which iron oxides are primarily reduced to metallic iron with grain growth, and then the reduction roasted product was ground to liberation size followed by magnetic separation. The iron product obtained by this pro

Recovery of Powdered Metallic Iron from Ludwigite Ore Via

03-02-2022 · Ludwigite ore has not yet been utilized on an industrial scale due to its complex mi neralogy and fine mineral dissemination. In this study, sodium salts were employed to enhance these paration of iron and boron by reductive roasting - magnetic separation.

Digestion of Alumina from Non-Magnetic Material Obtained

Recovery of iron from iron-rich diasporic bauxite ore via reductive roasting followed by magnetic separation has been explored recently. However, the efficiency of alumina extraction in the non-magnetic materials is absent. In this paper, a further study on the digestion of alumina by the Bayer process from non-magnetic material obtained after magnetic separation of reduced

Comparison of iron ores upgraded with Falcon concentrator

11-01-2022 · High-intensity wet magnetic, low-intensity dry magnetic and falcon gravity separators were applied to the roasted and unroasted ores at the optimum test conditions. After conversion, the iron concentrations in the grade that could be sold (>56% Fe) were obtained by the wet magnetic separator and the falcon gravity separator with the recovery yields of

Reductive Roasting Process for the Recovery of Iron Oxides

Reductive Roasting Process for the Recovery of Iron Oxides from Bauxite Residue through Rotary K iln Furnace and Magnetic Separation . Chiara Cardenia1, Buhle Xakalashe 2, Efthymios Balomenos 3, Dimitrios Panias 4 and Bernd Friedrich5 1.

BenefIciation of an Oolitic-Iron ORE by Magnetization

Beneficiation of an Oolitic-Iron Ore by Magnetization Roasting and Magnetic Sepration M. Monzavi 1,2 and Sh. Raygan 1* * shraygan@ Received: January 2022 Revised: March 2022 Accepted: May 2022 1 School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.

Magnetic Roasting and Leaching for Upgrading Minnesota

Iron recoveries from the magnetic products ranged from 70 percent to 90 percent; manganese recoveries from leach filtrates ranged from 75 percent to 95 percent. Two ores, from the Hillcrest and South Alstead properties, yielded magnetic products considered adequate for use as


Fatma et al. (1999) studied the beneficiation of an iron ore sample containing 44% Fe, % SiO 2 and 20% BaO. By magnetic separation, two products of iron ore and barite concentrates were obtained by using a high intensity magnetic separator. The fine fraction ( mm) is about 20% by weight assaying % Fe, and %


magnetic separators and the principal ferromagnetic mineral separated is magnetite (Fe304),although hematite (re203) and siderite (FeCO3) can be roasted to produce magnetite and hence give good separation. The removal of "tramp" iron from ores can also be regarded as a form of low-intensity magnetic separation.

Magnetizing Reduction of Iron Ores: Mineral Processing and

The efficiency of reduction-roasting/magnetic separation of hematite, goethite and any extremely finegrained iron ore, which is non-responsive to conventional processing techniques, is reviewed. Roasting equipment, roasting mechanism, superior results over conventional techniques, and certain advantages are highlighted.


  • Miftahul Jannat

    Provide a sample analysis report, and conduct a feasibility study and analysis based on the local environmental topography.

  • Eleanor Fant

    The entire team tactfully delivered a project of exceptional quality while staying on schedule & under budget.

  • Philippe Jenvrin

    We have been using it for a period of time, the quality of the product is very good, we will consider working together again.

Write a comment


Production Area


Senior Production Manager


junior & senior technicians


large production bases