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Method for treating low-magnesium limonitic laterite nickel ore

A technology of laterite nickel ore and a treatment method is applied in the field of comprehensive resource treatment of calcium and magnesium nitrate mixtures, and can solve the problems of poor practicability of magnesium sulfate hexahydrate, less application requirements for final products, and low recovery rate of metal nickel and cobalt, etc. Secondary pollution, improving economical value and environmental protection, good leaching effect

Inactive Publication Date: 2019-01-22
MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method solves the problem of producing a large amount of iron slag during sulfuric acid leaching, in the process, the required parameter control nodes are high, which is not conducive to industrial application; sometimes there is a shortcoming of poor practicability of magnesium sulfate hexahydrate
[0009] To sum up, the existing technologies for the treatment of laterite nickel ore all have high energy consumption, serious equipment corrosion, or low recovery rate of metal nickel and cobalt, difficult treatment of slag or wastewater generated in the process, or little demand for final product applications. And other issues

Method used

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  • Method for treating low-magnesium limonitic laterite nickel ore

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Embodiment 1

[0056] The present embodiment provides a method for processing low-magnesium limonite-type lateritic nickel ore, which specifically includes: the metal element content of the laterite used is as follows: 0.055% cobalt, 0.96% nickel, 37.94% iron, 0.16% calcium, 1.87% magnesium, Aluminum 0.66%, Silicon 0.35%. The processing steps are:

[0057] (1) The laterite ore is crushed and ball milled, and after the treatment, the particles with a particle size of 150 μm account for 91% of the total mineral particles;

[0058] (2) Take 0.5kg of the processed mineral material and leaching it in a 10L high-pressure reactor, and the amount of nitric acid is 0.5gHNO 3 / g mineral material, the liquid-solid ratio is 4:1, the leaching time is 60min, the leaching temperature is 150°C, the stirring speed is 300rpm, and the pressure is 0.88Mpa. Among them, the leaching rate is: 96.27% of cobalt, 96.34% of nickel, 0.27g / L of iron in the leaching solution, 44.63% of iron in the leaching residue afte...

Embodiment 2

[0064] This embodiment provides a treatment method for low-magnesium limonite-type laterite-nickel ore, which specifically includes: the metal element content of the laterite ore used is as follows: 0.063% cobalt, 1.12% nickel, 41.34% iron, 0.36% calcium, and 2.67% magnesium , aluminum 0.54%, silicon 0.51%. The processing steps are as follows:

[0065] (1) The laterite ore is crushed and ball milled, and after the treatment, the particles with a particle size of 150 μm account for 93% of the total mineral particles;

[0066] (2) Take 0.5kg of the processed mineral material and leaching it in a 10L high-pressure reactor, and the amount of nitric acid is 0.8gHNO 3 / g mineral material, the liquid-solid ratio is 6:1, the leaching time is 90min, the leaching temperature is 180°C, the stirring speed is 400rpm, and the pressure is 0.96Mpa. Among them, the leaching rate is: 97.16% of cobalt, 95.83% of nickel, 0.31g / L of iron in the leaching solution, 45.63% of iron in the leaching r...

Embodiment 3

[0072] This embodiment provides a treatment method for low-magnesium limonite-type laterite-nickel ore, which specifically includes: the metal element content of the laterite ore used is as follows: 0.071% cobalt, 1.24% nickel, 43.25% iron, 0.41% calcium, and 3.64% magnesium , aluminum 0.61%, silicon 0.72%. The processing steps are as follows:

[0073] (1) The laterite ore is crushed and ball milled, and after the treatment, the particles with a particle size of 150 μm account for 96% of the total mineral particles;

[0074] (2) Get 0.5kg of the processed ore material and leach it in a 10L high-pressure reactor, and the amount of nitric acid is 1.1gHNO 3 / g mineral material, the liquid-solid ratio is 8:1, the leaching time is 120min, the leaching temperature is 230°C, the stirring speed is 500rpm, and the pressure is 1.12Mpa. The leaching rate is as follows: 95.32% cobalt, 96.23% nickel, 0.43g / L iron in the leaching solution, 46.87% iron and 0.0031% nitrogen content in the l...

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Abstract

The invention discloses a method for treating a low-magnesium limonitic laterite nickel ore. The method concretely comprises the following steps: ore grinding pretreatment, nitric acid pressurizationleaching, neutralization for removing iron and aluminum, neutralization for precipitating nickel and cobalt, recovery of the nickel and cobalt through a resin column, solution ratio adjustment, and evaporative concentrating drying. The selective use of a leaching agent and an acid-base regulator in the treatment method makes all steps in the whole method cooperate with each other in order to realize the efficient and sufficient leaching and recovery of cobalt and nickel in the laterite nickel ore, and chemical agents added in the treatment method cooperate with each other to completely convertcalcium and magnesium metals in the laterite nickel ore into a calcium magnesium nitrate mixed fertilizer which can be directly recycled, so completely efficient utilization treatment of resources isachieved, and the problem of comprehensive utilization of the low-magnesium limonitic laterite nickel ore is solved. Substances discharged in the whole treatment process are directly recyclable products, and no wastewater / waste residue / waste gas is discharged, so the method has the advantages of simple and easily-controlled treatment steps, low energy consumption, low cost and high industrial actual values.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and chemical industry, and specifically relates to a treatment method for recycling laterite nickel ore resources, in particular to a method for leaching and recovering cobalt, nickel, Valuable metals such as magnesium and aluminum, and at the same time recover the calcium-magnesium nitrate mixture that can be used as fertilizer. Background technique [0002] Nickel is a very important strategic substance, mainly used in the production of stainless steel, alloys, new energy batteries, etc. Nickel products are widely used in aviation, aerospace, petrochemical, machinery manufacturing and energy materials. There is a serious shortage of nickel raw materials in my country, especially after 2016, with the development of new energy vehicles, the demand for ternary lithium batteries is huge, and the situation of nickel metal in short supply has become very serious. Judging from the production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/06C22B3/44C22B3/24C01F5/38C01F11/36C05C5/00C05C5/04
CPCC22B23/0438C22B23/0453C22B23/0461C01F5/38C01F11/36C05C5/00C05C5/04Y02P10/20
Inventor 赵林但勇赵澎刘伟
Owner MEISHAN SHUNYING POWER BATTERY MATERIALS CO LTD
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