Method for preparing high-nickel type ternary precursor through ferronickel production conversion and application of method

A precursor and high-nickel technology, applied in the field of metallurgy, can solve problems such as high cost, cumbersome steps, and high sales pressure, and achieve the effect of improving quality, cumbersome steps, and relieving supply pressure

Pending Publication Date: 2021-10-22
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is also a traditional method of using laterite nickel ore to produce nickel sulfate and then prepare a ternary precursor, which often uses low-matte nickel as a medium and needs to open up a special production line; but this method is costly, cumbersome and has high sales pressure

Method used

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  • Method for preparing high-nickel type ternary precursor through ferronickel production conversion and application of method
  • Method for preparing high-nickel type ternary precursor through ferronickel production conversion and application of method
  • Method for preparing high-nickel type ternary precursor through ferronickel production conversion and application of method

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Experimental program
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Effect test

Embodiment 1

[0060] The method for preparing a high-nickel type ternary precursor by converting ferronickel production in this embodiment includes the following specific steps:

[0061] (1) With nickel content of 1.5%, Fe content of 15%, SiO 2 A high-silicon magnesia laterite nickel ore in Indonesia with a content of 39%, a MgO content of 21% and a water content greater than 30% was used as a raw material. The laterite nickel ore was dried at 800°C to reduce the surface water content to 20%. %, and use a pulverizer to crush it into lump ore with a diameter of 50-100mm;

[0062] (2) Put the crushed lateritic nickel ore and coal in a rotary furnace, conduct a pre-reduction reaction for 2 hours at 1000°C, and remove part of the free water in the ore, and prepare part of the ferronickel by preheating The charge saves the energy consumption of the electric furnace in the next step;

[0063] (3) Transfer the product obtained in the rotary furnace to the feeding bin of the electric furnace, and...

Embodiment 2

[0075] The method for preparing a high-nickel type ternary precursor by converting ferronickel production in this embodiment includes the following specific steps:

[0076] (1) With nickel content of 1.5%, Fe content of 15%, SiO 2 A high-silicon magnesia laterite nickel ore in Indonesia with a content of 39%, a MgO content of 21% and a water content greater than 30% was used as a raw material. The laterite nickel ore was dried at 700°C to reduce the surface water content to 20%. %, and use a pulverizer to crush it into lump ore with a diameter of 50-100mm;

[0077] (2) Put the crushed lateritic nickel ore in a rotary furnace, conduct a pre-reduction reaction at 900°C for 2 hours, and remove part of the free water in the ore. While producing part of ferronickel, save by preheating the charge The energy consumption of the electric furnace in the next step;

[0078] (3) Transfer the product obtained in the rotary furnace to the feeding bin of the electric furnace, and carry out...

Embodiment 3

[0088] The method for preparing a high-nickel type ternary precursor by converting ferronickel production in this embodiment includes the following specific steps:

[0089] (1) With nickel content of 1.5%, Fe content of 15%, SiO 2 A high-silicon magnesia laterite nickel ore in Indonesia with a content of 39%, a MgO content of 21% and a water content greater than 30% was used as a raw material. The laterite nickel ore was dried at 800°C to reduce the surface water content to 20%. %, and use a pulverizer to crush it into lump ore with a diameter of 50-100mm;

[0090] (2) Put the crushed laterite nickel ore in a rotary furnace, conduct a pre-reduction reaction at 1000°C for 2 hours, and remove part of the free water in the ore. The energy consumption of the electric furnace in the next step;

[0091] (3) Transfer the product obtained in the rotary furnace to the feeding bin of the electric furnace, and carry out 2h deep reduction smelting at 1600°C, the reducing atmosphere is C...

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Abstract

The invention belongs to the field of metallurgy, and discloses a method for preparing a high-nickel type ternary precursor through ferronickel production conversion and application of the method. The method comprises the following steps of drying laterite-nickel ore, carrying out a pre-reduction reaction, and then carrying out deep reduction smelting, separation and refining to obtain a nickel-iron alloy; adding a sulfur-containing material into the ferro-nickel alloy for blowing, and then adding coke powder and quartz to obtain high-grade matte nickel; adding concentrated sulfuric acid into the high-grade matte nickel for reaction, conducting separation and pressure leaching, and obtaining nickel sulfate; and adding a cobalt source and a manganese source into the nickel sulfate, then adding a reducing agent, a precipitator, water and a complexing agent, and carrying out nucleation reaction and nuclear growth to prepare a high-nickel ternary precursor. According to the method for preparing the high-nickel type ternary precursor through the ferronickel production conversion and the application of the method, on the basis of an original RKEF process, the high-grade matte nickel is prepared by taking the ferronickel which is excessive in yield and low in price as an intermediate, adding the sulfur-containing material and adding a blowing device, and then the high-grade matte nickel is used for producing the nickel sulfate, so that the nickel recovery rate is further increased while the raw material supply pressure of the nickel sulfate is relieved to a great extent.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for preparing a high-nickel type ternary precursor through conversion of ferronickel and its application. Background technique [0002] Nickel has excellent physical and chemical properties, and is widely used in fields such as stainless steel, electroplating and batteries. At present, the identified nickel ore resources on the earth are mainly nickel sulfide ore and nickel oxide ore, of which nickel sulfide ore accounts for 30% of the total reserves, and laterite nickel ore whose main component is nickel oxide accounts for 70%. [0003] The current industrial development forms of lateritic nickel ore mainly include pyrometallurgy and hydrometallurgy, among which pyrometallurgy is the most widely used because of its short process flow, high nickel recovery rate and low environmental pollution. The phase composition of laterite nickel ore is complex, and the grade o...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B23/00C25C1/08
CPCC22B23/023C22B23/04C25C1/08Y02E60/10C22B23/00
Inventor 余海军吕思洁谢英豪李爱霞李长东张学梅
Owner GUANGDONG BRUNP RECYCLING TECH
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