Depression of iron oxides with corn starches

Peres, Antônio Eduardo Clark; Corrêa, Maria Ivaneide Coutinho

doi:10.1016/s0892-6875(96)00118-5

Cited by 78 publications

(22 citation statements)

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“…The alumina content of the slimes brought down in the beneficiated product will enhance (i) self-life of natural resources (ii) higher mine output with not much additional cost (iii) reduce environmental issues related to storage and dumping of fines and (iv) higher productivity by sinter plant. There are many beneficiation processes namely, gravity separation, 8) magnetic separation, 9,10) flotation [11][12][13][14][15] etc and techniques could, perhaps, be used for up gradation of these rejected ultra fines. As the rejected material is very fine in size, dispersion and flocculation [16][17][18][19][20] process can be thought to beneficiate of these materials and make suitable as feed material of blast furnace.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Flocculation Process to Selectively Separate Iron Minerals from Rejected Iron Ultra Fines of Indian Mines and Minimize Environmental Issue

Manna

2019

ISIJ Int.

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Section: Introductionmentioning

confidence: 99%

Optimization of Flocculation Process to Selectively Separate Iron Minerals from Rejected Iron Ultra Fines of Indian Mines and Minimize Environmental Issue

Manna

2019

ISIJ Int.

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“…According to Peres and Corrêa (1996), cornstarch has been Brazil's default depressant for iron ore since 1978. Modified cornstarches are composed of amylopectin (70-80%) and amylose (20-30%) without impurities such as fibers, mineral matter, oils and proteins normally present in conventional starches.…”

Section: Introductionmentioning

confidence: 99%

Temperature influence in cornstarch gelatinization for froth flotation

Silva

Peres

et al. 2017

REM, Int. Eng. J.

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Starches are widely used as depressant in froth flotation operations in Brazil due to their efficiency, increasing the selectivity in the inverse flotation of quartz, depressing iron ore. The starch market has been growing and improving in recent years, leading to better products attending the requirements of the mineral industry. The major source of starch used for iron ore is the cornstarch, which needs to be gelatinized, by heat or sodium hydroxide (NaOH) addition (also known as caustisized starch), prior its use. This stage has a direct impact on industrials costs, since the lower consumption of NaOH in gelatinization provides better control of the pH in the froth flotation and reduces the amount of electrolytes present in the pulp. In order to evaluate the influence of temperature on the NaOH consumption, gelatinization tests were carried out with temperatures ranging from 25 to 65 °C, measuring the volume of NaOH. All tests were performed in triplicate. A linear model correlating the temperature and the NaOH need for the cornstarch gelatinization has been stablished. This model can allow mineral industries to optimize the NaOH amount used to prepare the depressant used in froth flotation. For example, the reduction in NaOH could easily reach 480 L per ton of cornstarch when performing gelatinization with the cornstarch solution at 35 °C instead of 25 °C (reduction of approximately 34% in the NaOH consumed).

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“…In the case of hematite bearing ore bodies, froth flotation is predominantly used for the beneficiation of the -150 micron material in both Brazil and the USA. Brazilian ore bodies typically have low concentrations of impurities and therefore the general practice is to use reverse flotation (Peres et al, 1996). Typically, Brazilian flotation plants will de-slime prior to flotation, as the presence of -10 micron material substantially increases the reagent consumption, deeming the option uneconomical.…”

Section: Introductionmentioning

confidence: 99%

Upgrade of SLon concentrate with the use of froth flotation on a typical African iron ore

Kruger

Naik

Naude

2017

Mineral Processing and Extractive Metallurgy Review

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This study focus on the upgrading of SLon concentrates, of a complex African iron ore, with the aid of flotation. Mineralogical studies indicated that the +38µm material was not liberated and required milling prior to flotation. The-38µm material was well liberated and was close to the required product specification, with a Fe content of 99.7% of the target grade. The proposed beneficiation process includes de-sliming (38µm) of the SLon concentrate and milling of the +38µm material, followed by froth flotation. The new proposed flow diagram showed that the SLon concentrate of this African iron ore can successfully be upgraded.

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Depression of iron oxides with corn starches

Cited by 78 publications

References 1 publication

Optimization of Flocculation Process to Selectively Separate Iron Minerals from Rejected Iron Ultra Fines of Indian Mines and Minimize Environmental Issue

Optimization of Flocculation Process to Selectively Separate Iron Minerals from Rejected Iron Ultra Fines of Indian Mines and Minimize Environmental Issue

Temperature influence in cornstarch gelatinization for froth flotation

Upgrade of SLon concentrate with the use of froth flotation on a typical African iron ore

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