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A discussion of magnetic separation techniques for ...

A discussion of magnetic separation techniques for concentrating ilmenite and chromite ores M. DOBBINS*, J. DOMENICO*, and P. DUNN* *Outotec (USA) Inc.—Minerals Processing, Physical Separation Magnetic separation has long been used to upgrade and beneficiate a wide variety of industrial minerals.

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Enrichment Characteristics of Cr in Chromium Slag after ...

After the reduction treatment, the metallic iron can be separated from the chromium slag by the melting separation method or magnetic separation method because of the magnetic difference between the metal and slag [19,20,21,22]. According to extensive experimental research and productive practices, the higher the ratio of chromium to iron (Cr ...

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Recovery of iron from copper slag via modified roasting in ...

A novel technology, modified roasting in CO–CO2 mixed gas and magnetic separation, was presented to recover iron from copper slag. The effects of various parameters such as dosage of flux (CaO), gas flowrate of CO and CO2, roasting temperature, roasting time, particle size of modified slag and magnetic flux density on the oxidized modification and magnetic …

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Magnetic separation of coal fly ash from Bulgarian power ...

Aug 10, 2010· Abstract. Fly ash from three coal-burning power plants in Bulgaria: 'Maritza 3', 'Republika' and 'Rousse East' were subjected to wet low-intensity magnetic separation. The tests were performed at different combinations of magnetic field intensity, flow velocity and diameter of matrix elements.

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A Multi-step Process for the Cleaner Utilization of ...

Feb 16, 2019· Abstract. A multi-step process has been developed for the recovery of metal values from vanadium-bearing converter slag. A beneficiation process combined with grinding, sieving and magnetic separation steps was firstly utilized to recover metallic iron from the vanadium-bearing converter slag.

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ERMS Roasting Process - Austpac Resources

Further magnetic treatment of chrome-bearing ilmenite concentrate does little to lower the chrome content and results in significant ilmenite losses. Ilmenite concentrate produced by magnetic separation can be roasted in a fluid bed reactor to enhance the magnetic susceptibility of ilmenite with little effect on any other mineral in the ...

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US4295881A - Process for extraction of platinum group ...

A process for treating chromite-bearing ores to obtain useful mineral values, especially platinum group metal, therefrom wherein the ore is separated into magnetic and non-magnetic fractions; the non-magnetic fraction, containing a substantial portion of the platinum group metals, is concentrated and smelted to produce a metal layer containing platinum group metals; and the …

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Recycling Chrome Refractory Waste - 911metallurgist.com

Jul 04, 2017· Recycling Chrome Refractory Waste. Chromite ore in combination with various quantities of magnesia is used in basic refractories. Refractories of this type are used as linings in steelmaking and copper smelting furnaces, rotary cement calciners, and glassmaking tanks. However, most of the consumption is by the copper and steel industry.

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Application of magnetic separation to steelmaking slags ...

Jan 01, 2006· The slags in magnetic separation tests are divided into two groups: magnetic (M) and non-magnetic (NM). Fig. 6a and b show the effects of the drum blade gap on the magnetic separation. These figures show that magnetic grains are better collected by decreasing the grain size of slags.

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Nickel recovery from electric arc furnace slag by magnetic ...

During the pyrometallurgical treatment of the nickel-bearing laterite in the plant of G.M.M. S.A. LARCO, slag is produced after treatment in electric-arc …

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Kinetics of chromite vs. ilmenite magnetization during ...

consisted of two magnetic separation steps at different magnetic field strengths—2 350 Gauss and 6 500 Gauss— with subsequent roasting and magnetic separation of the reject stream with the lowest magnetic susceptibility. They did not recommend any process conditions for roasting. The aim of the investigation reported by Gouws and Van Dyk1

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UDC 669 . 054 . 82 : 669 . 184 . 244 . 66 Processing and ...

Fig. 2. Steelmaking slag is subjected to the following four process-es: ① solidify and cooling of the hot molten slag, ② crushing and magnetic separation treatment of the slag to recover the metal iron, ③ crushing and classification of the slag for grain size adjustment to manufacture the slag product, and ④ aging treatment of the slag

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ANNEXURE 11 - Tata Steel

Apr 25, 2019· chrome slag Ferro chrome slag can be used for extraction of spinel and silico-chrome containing metal. Based on the laboratory results, plant trials were carried out. Reduction roasting and magnetic separation of low grade Manganese ores Low grade ferruginous manganese ores can be upgraded to high grade ores by reduction roasting and magnetic ...

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US20120132032A1 - Magnetic recovery of valuables from slag ...

The present invention relates to a process for the separation of at least one metal from a slag, comprising that at least one metal and further components, comprising at least step (A) grinding the slag, (B) if appropriate, contacting the ground slag of step (A) with at least one surface-active substance and/or at least one magnetic particle, if appropriate in the presence of at least one ...

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(PDF) Magnetic separation studies on ferruginous chromite ...

In case of SS slag and low carbon (LC) FeCr slag a wet high intensity magnetic separation can up-concentrate Cr in the SS slag (fraction <150 µm) from 2.3 wt.% to almost 9 wt.% with a yield of 7 ...

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African Chrome Fields: Game changer along the Great Dyke ...

Feb 07, 2018· Once pre-screened on site at the deposit to remove over-sized material, the chrome-bearing ore is hauled to the plant where it scrubbed and screened to remove the washable component. The chromite is then extracted in a five-stage spiralling circuit, followed by magnetic separation, to produce a final product in the -1 mm size fraction.

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Magnetic separation and extraction chrome from high carbon ...

The data on measuring the slag viscosity of the CaO-SiO2-CrO system are presented by authors of [15]; extracting chromium from high-carbon ferrochrome slag by magnetic separation is …

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Application of magnetic separation to steelmaking slags ...

Jan 01, 2006· The slags in magnetic separation tests are divided into two groups: magnetic (M) and non-magnetic (NM). Fig. 6a and b show the effects of the drum blade gap on the …

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Mineralogical characterisation and magnetic separation of ...

1084 Waste Management & Research 36(11) (Jena et al., 2015). The size of the converter slag should be reduced with a series of crushers before the magnetic separation step in …

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High Intensity Magnetic Separator - JXSC Machine

High-intensity magnetic separators are the upgrading products of dry separators developed on the basis of the original dry separators by improving the magnetic field strength and magnetic block arrangement. Its magnetic system is all made of high-performance rare-earth nd-fe-b material and high-quality ferrite material with high magnetic field strength (up to 12000 GAUSS).

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CN102430472A - Direct reduction-magnetic separation method ...

The invention belongs to the technical field of metallurgy and particularly relates to a direct reduction-magnetic separation method of vanadium titanomagnetite. The method comprises the following steps of: grinding iron ore concentrate powder and pulverized coal, evenly mixing and molding; putting a blank into an airtight lidded crucible, and burying the crucible in …

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Mineral Processing Technology and Environment Protection ...

Aug 13, 2019· 1.4 Mineral processing technology in steel industry wastewater treatment. Gravity separation, magnetic separation and flotation are the three major beneficiation technologies in the current beneficiation industry, and high-gradient magnetic separation is a hotspot in the field of magnetic separation. Magnetic separation was first used in the separation of …

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Magnetic separation-sulphuric acid leaching of Cu–Co–Fe ...

Oct 01, 2014· Co–Fe alloy was enriched during the magnetic separation. Owing to the grinding characteristics of matte as mentioned in Section 2.1 and inevitable mechanical entrainment in magnetic separation process, a small amount of the bornite, chalcocite, ferrous sulfide and metal copper still remain in concentrate, as shown in Table 4 and Fig. 3.

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Magnetic separation and extraction chrome from high …

The data on measuring the slag viscosity of the CaO-SiO2-CrO system are presented by authors of [15]; extracting chromium from high-carbon ferrochrome slag by magnetic separation is in …

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Gravity Separation - an overview | ScienceDirect Topics

Gravity separation has been applied to process chrome slag by steel researchers in India. Heavy media separation (Choudhury et al., 1996) and crushing and jigging (Khan et al., 2001) are the principal techniques used. The slag is subjected to 2-stage crushing to reduce the size to −10 mm and then screened into −10 +1 mm and −1 mm fractions.

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Separation and Recovery of Phosphorus from P-bearing ...

May 01, 2014· In order to recycle the phosphorus from P-bearing steelmaking slag, the influences of magnetic field intensities, slag particle sizes and slag compositions were investigated by magnetic separation experiments. SiO2, Al2O3 and TiO2 melting modification of converter slag was made respectively and phosphorus-rich phase was extracted by magnetic …

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Smelting process of direct reduction iron bearing Ni and ...

followed by the magnetic separation of copper slag and nickel laterite to prepare the direct iron powder containing Cu and Ni was proposed in an earlier paper [14 ]. The copper slag and nickel laterite were effectively upgraded, and this process produced the crude Fe-Cu-Ni alloy simultaneously. However, the impurity content, especially the ...

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Mineralogical characterisation and magnetic separation of ...

Sep 10, 2018· Grinding, sieving and magnetic separation were combined to recover metallic iron from the converter slag, and yielded approximately 41.5% of iron in which the iron content was as high as 85%, and the non-magnetic concentrate contains 8.56% vanadium with a yield of 95.3% and 8.63% titanium with a yield of 85.3%.

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ferrochrome production process pdf

Feb 10, 2021· The ferrochrome slag production is 1.2 t / t FeCr. It is mainly granulated and the rest is air-cooled. There is an in-house special handling and metal recovery process for the air-cooled slag, where it is made into finished products. In addition to recov-ered ferrochrome, classified slag pr oducts are also made. Chat

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(PDF) Recovery of metal from slag/mixed metal generated in ...

Hence, a combina- much difference in the chromium content of the tion of magnetic separation and gravity separation was coarse ( 10+3 mm) and fine ( 3+1 mm) fractions of tried. concentrate, and each fraction was of acceptable The slag crushed to 10 mm was subjected to grade, i.e., having more than 58% chromium.

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CN101342512A - Steel scoria processing method - Google Patents

The invention relates to a steel-slag processing method, including the procedures of separation, magnetic separation, fine crushing, magnetic separation, ball-mill washing, etc. The slag and steel are separated by fine processing of waste steel slag, the iron content in the waste slag is lowered, the waste steel is smelted again and recovered for use.

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Separation and Recovery of Phosphorus from P-bearing ...

May 01, 2014· Abstract. In order to recycle the phosphorus from P-bearing steelmaking slag, the influences of magnetic field intensities, slag particle sizes and slag compositions were investigated by magnetic separation experiments. SiO 2, Al 2 O 3 and TiO 2 melting modification of converter slag was made respectively and phosphorus-rich phase was extracted ...

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Separation of Iron Phase and P-Bearing Slag Phase from ...

Jan 22, 2016· Since the separation of iron grains and P-bearing slag was not achieved at the low temperature under the conventional conditions, separate experiments of the iron phase and the P-bearing slag phase from gaseous-reduced, high-phosphorous oolitic iron ore at 1473 K (1200 °C) by super gravity were carried out in this study.

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