Treatment method of nickel-containing eluvial ores

A treatment method and technology of nickel residue, which is applied in the field of metallurgy, can solve the problems of increased loss of valuable components, poor slag properties, and increased system slag volume, so as to improve the effective use of resources, reduce secondary pollution, and improve slag properties Effect

Active Publication Date: 2014-04-30
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

However, the generated slag has poor properties and high sulfur content, which is not suitable for use as building materials.
Subsequent leachate purification and removal of iron and aluminum uses lime slurry as a neutralizing agent, which

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  • Treatment method of nickel-containing eluvial ores

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Embodiment 1

[0097] refer to figure 2 , 1) First divide the nickel-containing residual ore to be treated into magnesian ore and iron ore; 2) Then, at a temperature of 85-98 degrees Celsius, use sulfuric acid to leach the iron ore in order to obtain ferric sulfate The leaching solution, wherein the free acid content in the leaching solution containing iron sulfate is 40-45g / l; 3) Then at a temperature of 85-98 degrees Celsius, the leaching solution containing iron sulfate is subjected to a first neutralization treatment using magnesia ore, In order to reduce the content of free acid in the leaching solution to 5g / l, filter and wash to obtain the neutralized liquid and the leaching residue containing silicon dioxide, which contains about 60% SiO2 in the leaching residue containing silicon dioxide and can be used in the building materials industry; 4 ) further use magnesium hydroxide to carry out the second neutralization treatment on the neutralized liquid obtained in the previous step, mai...

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Abstract

The invention discloses a treatment method of nickel-containing eluvial ores. The treatment method comprises the following steps: (1) dividing the nickel-containing eluvial ores into magnesian ores and iron ores; (2) carrying out leaching treatment on the iron ores by utilizing sulfuric acid to obtain a leaching solution containing ferric sulfate, wherein the content of free acid in the leaching solution containing the ferric sulfate is 40-45g/l; (3) carrying out first neutralization treatment on the leaching solution containing ferric sulfate by utilizing the magnesian ores to enable the content of the free acid in the leaching solution to be lowered to 5g/l, and obtaining a solution after neutralization and leaching residues containing silicon dioxide; (4) carrying out second neutralization treatment on the solution after neutralization obtained in the third step by utilizing magnesium hydrate, and maintaining the pH value to be 1.0-1.5 to obtain precipitated iron concentrate and a solution after iron removal; and (5) carrying out third neutralization treatment on the solution after iron removal obtained in the fourth step by utilizing the magnesium hydrate to enable the pH value of the solution after iron removal to remain between 7.0-7.5, and obtaining nickel-cobalt hydroxide precipitates and a magnesium sulfate solution.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a treatment method for nickel-containing residual ore. Background technique [0002] According to the geological origin of nickel oxide ore, the ore layer is usually divided into limonite layer, transition layer and saprolite layer from top to bottom. Among them, the limonite layer is generally high in iron content and low in magnesium content, which is suitable for high-pressure leaching technology; the content of nickel and magnesium in the transition layer has increased, and it is suitable for the reduction roasting ammonia leaching process; although the nickel content in the lower saprolite layer is relatively high , but the magnesium content is also very high, and the pyrotechnics is generally used to smelt ferronickel or nickel matte. [0003] Although nickel oxide ore transition layer minerals can be processed by reduction roasting technology, such as the Cuban Nigaro plant. Ho...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B3/26C22B3/44C22B23/00C25C1/08
CPCY02P10/20
Inventor 傅建国戴江红李少龙孙宁磊张阳陆业大郑明臻王魁廷
Owner CHINA ENFI ENGINEERING CORPORATION
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