Products

acide to extract iron from laterite

THE KINETIC PROFILE OF IRON DISSOLUTION FROM LATERITE

The dissolution profile of iron from laterite ore in hydrochloric acid at temperature 30, 50, 70 and 90 °C is shown in Figure 3. At 30 °C, the dissolution rate seems to take place slowly. The percentage of iron extracted from laterite after being leached for 250 minutes is less than 40 %. The increasing of

More

Iron Control in Atmospheric Acid Laterite Leaching

acid leaching of the same laterite samples was approximately 0.6–0.8 kg acid per kg laterite. Iron dissolution was only 1.5–3% during the combined precipitation and acid leaching tests, whereas in direct acid leaching it was 15–30% with the Agios Ioannis and

More

Effective Separation and Beneficiation of Iron and

The utilization of laterite sulfuric acid leach residue has always been a challenge in the metallurgical industry. The current treatment involves deep-sea landfills, which leads to considerable environmental pollution and resource wastage. In this work, an effective method is proposed to recover iron and chromium from sulfuric acid leach residue. The effects of roasting temperature, reducing

More

Extraction of Nickel, Cobalt and Iron from Laterite Ores

High iron (> 35 % Fe) limonitic ores can be treated by high pressure leach using sulfuric acid. An alternative process for the production of base metals (Ni, Co and Fe) from both high and low iron laterite ores is being developed by Process Research ORTECH Inc. (PRO), a world leader in the development of chloride metallurgy.

More

Facile and inexpensive preparation method of iron

Jun 01, 2020· 1. Introduction. Currently, limonitic nickel laterite ore is one of the major sources for extracting Ni and Co. Limonitic laterite ores usually contain large amounts of Fe exceeding 40% [,,].At present, the primary technology to treat limonitic laterite ores is high-pressure acid leaching (HPAL) with sulfuric acid, which produces 0.9 t leach residue from 1 t laterite ore.

More

Selective Recovery of Scandium from Nickel Laterite Ore by

In this study, a two-stage process called “acid roasting–water leaching” was developed to extract scandium from laterite ore with minimal co-extraction of iron. In this process, the ore was mixed with concentrated sulfuric acid (98 wt%) and roasted in a furnace at or above 600 °C.

More

Acide To Extract Iron From Laterite

Acide To Extract Iron From Laterite Copper & Nickel Solvent Extraction. 5 Sep 2017 . This reduces the nickel and iron to ferronickel, and the copper and cobalt to the . Either di- (2 ethyl- hexyl) phosphoric acid (DEHPA) or a mixture of . The kinetics of nickel extraction from laterite liquor containing about 1.24.

More

US7387767B2 Recovery of nickel, cobalt, iron, silica

The laterite ore is leached as a slurry in a pressure acid leach containing an excess of aqueous sulphuric acid at high pressure and temperature, excess free acid in the leach slurry is partially neutralized to a range of 5 to 10 g/L residual free H 2 SO 4 and washed to yield a nickel- and cobalt-containing product liquor, the product liquor is

More

CN104726724A Method for extracting scandium from nickel

The invention provides a method for extracting scandium from nickel laterite ores. The method includes carrying out leaching treatment on the nickel laterite ores by the aid of sulfuric acid to obtain leach liquor of the nickel laterite ores; carrying out scandium-rich precipitation treatment on the leach liquor of the nickel laterite ores by the aid of first precipitants to obtain scandium

More

(PDF) Extraction of Scandium from Lateritic Nickel-Cobalt

scandium and ferrous iron. Laterites have a polymeric medium in which is dispersed a liquid alkylphosphoric acid as a cation extracting agent to extract essentially all of the scandium by the

More

THE KINETIC PROFILE OF IRON DISSOLUTION FROM

The dissolution profile of iron from laterite ore in hydrochloric acid at temperature 30, 50, 70 and 90 °C is shown in Figure 3. At 30 °C, the dissolution rate seems to take place slowly. The percentage of iron extracted from laterite after being leached for 250 minutes is less than 40 %. The increasing of

More

Iron Control in Atmospheric Acid Laterite Leaching

The acid consumption was approximately 0.4 kg acid per kg laterite, whereas the acid consumption in direct acid leaching of the same laterite samples was approximately 0.6–0.8 kg acid per kg laterite. Iron dissolution was only 1.5–3% during the combined precipitation and acid leaching tests, whereas

More

Iron Control in Atmospheric Acid Laterite Leaching

acid leaching of the same laterite samples was approximately 0.6–0.8 kg acid per kg laterite. Iron dissolution was only 1.5–3% during the combined precipitation and acid leaching tests, whereas in direct acid leaching it was 15–30% with the Agios Ioannis and

More

Iron Control in Atmospheric Acid Laterite Leaching MDPI

Iron control in the atmospheric acid leaching (AL) of nickel laterite was evaluated in this study. The aim was to decrease acid consumption and iron dissolution by iron precipitation during nickel leaching. The combined acid leaching and iron precipitation process involves direct acid leaching of the limonite type of laterite followed by a simultaneous iron precipitation and nickel leaching step.

More

Effective Separation and Beneficiation of Iron and

The utilization of laterite sulfuric acid leach residue has always been a challenge in the metallurgical industry. The current treatment involves deep-sea landfills, which leads to considerable environmental pollution and resource wastage. In this work, an effective method is proposed to recover iron and chromium from sulfuric acid leach residue. The effects of roasting temperature, reducing

More

CA2859035A1 Separation of iron from value metals in

The laterite ore or concentrate is subjected to a leaching step with a lixiviant comprising hydrochloric acid to leach nickel from the laterite ore, followed by a liquid/solids separation step. The liquid obtained is subject to solvent extraction with a dialkyl ketone, to obtain a solution rich in iron and a raffinate.

More

Atmospheric acid leaching of nickel laterites review. Part

Mar 01, 2008· It was also conceded by Harris et al. (2006b) that some laterite samples previously examined readily released their contained nickel and cobalt with low acid addition resulting in high metal extraction and low final iron concentrations, whereas other samples were much less reactive and required higher levels of acid to extract nickel with no

More

US4410498A Acid leaching of nickel from serpentinic

Sulphuric acid leaching has been used in the treatment of lateritic ores for the recovery of nickel and cobalt therefrom. However, in order to obtain good extraction from these ores, prolonged treatment using acid of high strength and also using high pressures and recycling steps have been necessary. In the improved method of the invention nickel and cobalt is solubilized from high-magnesia

More

Reagent selection for recovery of nickel and cobalt from

Jun 01, 2015· The process involves leaching nickel laterite ores with high concentrations of nitric acid, combining product recovery with recycling of the lixiviant (nitric acid) and neutralisation reagent (magnesium oxide). Iron and aluminium impurities are precipitated to produce a nitrate-based nickel–cobalt pregnant leach solution (PLS).

More

Extraction of nickel from lateritic ores at atmospheric

In the laterite leaching process using sulfuric acid, the addition of NaCl, for example at amount of 10% of solid weight, at 70 °C resulted the increase of nickel and cobalt recoveries up to 18

More

(PDF) Extraction of Nickel, Cobalt and Iron from Laterite

This paper describes progress made in nickel laterite technology since 1998, when high-pressure acid leaching, a low-cost method to recover nickel from laterite ores, was introduced in Western

More

Extraction of Nickel from Garnierite Laterite Ore Using

Abstract: In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% MgO, and 37.86% SiO2 was collected in the Mojiang area of China. Garnierite was the Ni-bearing

More

extracting iron ore from laterite

Smelting Iron from Laterite: Technical Possibility or . rences of highgrade ore [in Malaya] are quite distinct from the concretionary deposits of ironstone, very widespreadthroughout Malaya [and Southeast Asia generally], but too shallow and containing too low a content of iron to be of commercial value as iron

More

Iron control in atmospheric acid laterite leaching — VTT's

The acid consumption was approximately 0.4 kg acid per kg laterite, whereas the acid consumption in direct acid leaching of the same laterite samples was approximately 0.6-0.8 kg acid per kg laterite. Iron dissolution was only 1.5-3% during the combined precipitation and acid leaching tests, whereas in direct acid leaching it was 15-30% with

More