After this, there is another leaching stage to remove iron and copper, and finally nickel is precipitated by the addition of ammonia, ammonium sulfate and hydrogen. One of the most used processes to treat nickel and cobalt "speiss" is that used by the company, Sherritt Gordon Mines Ltd, from Fort Saskatchewan, Alberta, Canada.

بیشتر

The preparation of nickel-based coatings from DES commonly uses nickel chloride as the main precursor of Ni 2+, but it generates harmful chlorides during long-term electrodeposition. This article uses nickel sulfate as the main precursor of Ni 2+ to investigate the effects of boric acid and water on the deposition of Ni/TiO 2 composite coatings ...

بیشتر

In contrast, the releases of nickel from nickel carbonate, nickel subsulfide, and nickel metal powders in pure water are consistent with their releases in synthetic lung fluid, indicating that deionized water is a better leaching solution to estimate the biologically relevant 'water-soluble' nickel …

بیشتر

Therefore, this paper focuses on studying the optimal process parameters and the mechanism of sulphation roasting followed by water leaching achieving efficient synchronous extraction of nickel (Ni), copper (Cu), and cobalt (Co) from low‒nickel matte with sodium sulfate as the sulfating addictive.

بیشتر

2 nickel subsulfide NiSO 4 nickel sulfate ... drinking-water is leaching from metal alloys in contact with drinking-water. Toxicity data for water-soluble Ni salts are the most relevant to assessing potential health risks from Ni exposure in drinking-water. Human oral exposure to Ni is primarily associated with

بیشتر

Metal leaching from a low-grade nickel ore was investigated using an ammonium sulfate roasting-water leaching process. The nickel ore was mixed with ammonium sulfate, followed by roasting and finally leaching with water. During the process the effects of the amount of ammonium sulfate, roasting temperature, and roasting time on the leaching recovery of metal elements were …

بیشتر

Separation of nickel and iron from lateritic ore using digestion-roasting-leaching-precipitation 569 As result, significant amounts of nickel, cobalt and iron were transformed to metal sulfate forms, which can be leached in water easily. However, it is known that the iron content of the final nickel product must be as low as possible.

بیشتر

This paper presents the results of Co(II) and Ni(II) extraction from model and real solutions using bis(2,4,4-trimethylpentyl)phosphinic acid (i.e. Cyanex 272) that are in agreement with waste-to-resources approach, i.e. the recovery of valuable components from wastes. The results from this study sh …

بیشتر

Nickel or nickel sulfate hexahydrate is a common allergen that causes contact dermatitis in sensitized individuals. ... as nickel can potentially leach into the water …

بیشتر

12%The recoveries of rare earth elements (REEs), nickel, and cobalt from hybrid electric vehicle batteries by sulfation, selective roasting, and water leaching have been studied. The cathode and anode materials of a Panasonic Prismatic Module nickel metal hydride (NiMH) battery were used in the study. The optimal conditions for each step of the process were determined by …

بیشتر

material in a large volume of solution (i.e., water). Heavy Metals - Metals, when in significant concentrations in water, that may pose detrimental health effects. Heavy metals include lead, silver, mercury, copper, nickel, chromium, zinc, cadmium and tin that must be removed to certain levels to meet discharge requirements.

بیشتر

The method of producing high-purity nickel sulfate of claim 2, wherein the nickel-containing solution is a nickel sulfate solution obtained by leaching a nickel oxide ore with sulfuric acid, separating impurities other than a target component to obtain a residue, and adding a sulfurizing agent to the residue to form a nickel sulfide, and then ...

بیشتر

thors investigated leaching of nickel and cobalt from waste superalloys with sulfuric acid directly, the influ- ence factors on the leaching rates of nickel and cobalt ware mainly discussed based one the experimental re- sults. 2. Experimental . 2.1. Experimental Materials . The materials used in this experiment were prepared by air-atomization.

بیشتر

sulfate as the oxidation medium, and nickel(II) sulfate dissolved in sulfuric acid solution. The reason for the use of a synthetic nickel sulfate solution at the start of the nickel selective leaching behavior investigation is that a nickel(II) sulfate solution containing sulfuric acid is yielded as an electrolyte from the nickel electro ...

بیشتر

leaching (SAL) process [2-5]. The SAL process involves selective leaching of nickel from MHP, leaving cobalt and manganese in the solid residue (Fig. 1). The process yields a concentrated nickel sulfate solution suitable for direct recovery of a final nickel product and a cobalt concentrate which

بیشتر

The invention provides a method for direct electrolysis of laterite nickel ore by sulfuric acid leaching, and relates to a method for sulfuric acid normal-pressure leaching of low-grade laterite nickel ore, belonging to the technical field of hydrometallurgy. The method comprises the steps: separately grinding and pulping iron ore and magnesium ore in the laterite nickel ore, carrying out ...

بیشتر

2.3.2 Copper ions in a leaching solution of hydrogen peroxide and sulfuric acid.....11 2.3.3 The reaction kinetics for Hydrogen peroxide decomposition in a sulfuric acid ... 1.0M sulfuric acid (light green) and 0.3144M copper sulfate (purple). Pure water curve (light blue) and the solution of CuSO 4 and H 2 SO 4 with 5ml H 2 O 2 (Black). All at ...

بیشتر

Modify. . Create. . Nickel sulfate hexahydrate appears as blue or emerald-green crystalline material. Toxic and carcinogenic. Two known phases. Alpha-form (blue tetragonal) converts to beta-form (green monoclinic) at 127.9°F. Becomes blue and opaque at room temperature.

بیشتر

Metal leaching from a low-grade nickel ore was investigated using an ammonium sulfate roasting-water leaching process. The nickel ore was mixed with ammonium sulfate, followed by roasting and finally leaching with water. During the process the effects of the amount of ammonium sulfate, roasting temperature, and roasting time on the leaching recovery of metal elements were analyzed.

بیشتر

magnesium sulfate, mitigates the formation of basic iron sulfates but with greater generation of sulfuric acid in the leach liquor. Under the conditions employed in this study, this acid could be employed to leach other nickel-containing materials such as nickel laterites.

بیشتر

Nickel is an important metal in modern infrastructure, with major uses in stainless steel (~65%), metal alloys (~20%) and plating (~9%), as well as electric batteries and chemicals [1]. Economic resources of nickel are found in either sulfide or laterite-type ores. Globally, the bulk of historic production has been

بیشتر

Nickel can be inadvertently added to processed foods based on the equipment used for processing and can be added to canned foods via leaching from the metallic can. 12 Nickel is also present in tap water, especially hot water, which can leach nickel from faucet fixtures into the water sitting overnight in the fixtures. 13 Stainless steel ...

بیشتر

nickel from drinking water ranges from 4 to 8.6 µg/day. Elevated levels of nickel may exist as a result of the corrosion and leaching of nickel alloys used in valves and faucets. For the general population, the ... exposure to nickel sulfate, nickel chloride, or nickel nitrate. The observed effects included histological

بیشتر

The present study investigates the potential to recover nickel from pyrrhotite tailings. Leaching tests were performed in acidic ferric sulfate media with 0.14 wt % solids to keep the ferric concentration essentially constant. The temperature was varied between 30 and 55 °C, and the ferric concentration was in a range 0.02–0.3 M.

بیشتر

A 1200 ton-per-day, energy efficient, sulfuric acid plant under construction with the first all-austenitic nickel stainless steel converter in the center. The hot SO

بیشتر

• The amount of nickel in the soil and water used to grow the food. • Processed and canned foods can add nickel via equipment used and leaching from the metallic can. • Tap water may contain nickel. Hot water can leach nickel from faucets into the water sitting overnight in the fixtures.

بیشتر

At leaching process by using water and acid solution Ni, Mg, Al, V and Zn were dissolved and at ion exchange step, more than 80% of V and Ni were recovered on C467 and CR20 ion exchange resins, respectively.Lai et al [6] studied metals (e.g. Al, Co, Cu, Fe, Mo, Pb, V, and Zn) recovery from spent Hydro Desulfurizarion Catalysts (HDS) by 2 types ...

بیشتر

dissolving cobalt sulfate, nickel sulfate (analytical grade) with distilled water, with Ni2+ and/or Co2+ concentrations of 5g/L and 0.4-2g/L. The industrial sodium hypochlorite (10%) solution was used directly. The solution pH was adjusted using the dilute sulfuric acid. Methods. Leaching experiments were carried out in a 500ml Erlenmeyer flask ...

بیشتر

From here, there is further leaching to remove iron and copper, and finally precipitation of nickel by addition of ammonia, ammonium sulfate, and hydrogen. An excellent example the use of PAL on low-grade lateritic nickel ores is the Ambatovy mine in Madagascar, a joint venture between Sherritt, Sumitomo, and Korea Resources.

بیشتر

Invas- laboratory and on the information supplied by the gen- canu and Roman [1] studied the recovery of nickel from erator. The extraction of rare metals from the hydro- a spent catalyst in an ammonia plant by leaching it in desulfurization catalyst by leaching with sulfuric acid sulfuric acid solution. Ninety-nine percent of the nickel yields ...

بیشتر