Wet treatment method for ferronickel and application thereof

A wet treatment, ferronickel technology, applied in the field of metallurgy, can solve the problems of slow reaction, long time, and inability to apply in large quantities, and achieve the effects of high leaching efficiency, avoiding environmental pollution, and accelerating the reaction rate

Active Publication Date: 2021-11-19
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has the characteristics of simple process, high recovery rate of nickel-containing pig iron, low cost and good product performance, it cannot be applied in large quantities due to slow reaction and long time in acid leaching treatment.

Method used

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  • Wet treatment method for ferronickel and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Nickel iron wet treatment method, combination figure 1 The specific process is:

[0028] (1) Raw material pretreatment, nickel iron is crushed into powder or granules.

[0029] (2) a high pressure acid immersion, in a high pressure oxygen environment having a closed pressure of 6.5 MPa, a temperature of 90 ° C, the pulverized powder obtained by the step (1) is threatened by a concentration of 3 mol / L, and acetic acid is added to obtain a mixture The solid-liquid ratio of the mixed slurry is 1: 100 g / ml, the reaction time is 3 h;

[0030] (3) After the filtering process, the reaction is completed, and the filtrate and filter residue are filtered, and the nickel iron pulverization is added to the filtrate to carry out a small amount of copper from the liquid in the filtrate, and filter it again to obtain nickel Iron. Copper filtrate, nickel-iron returning to step (2), a high pressure acid immersion, circulating several times of cycling, a high copper content of nickel-iro...

Embodiment 2

[0036] A nickel iron wet treatment method, the specific process is:

[0037] (1) Pretreatment of raw materials, nickel iron is broken into powdered or granules of nickel iron.

[0038] (2) a high pressure acid immersion, in a high pressure oxygen environment having a closed pressure of 3.0 MPa, a temperature of 50 ° C, the pulverate obtained by the step (1) was immersed in a concentration of 8 mol / L, and acetylacetone was added. The mixed slurry, the solid-liquid ratio of the mixed slurry is 1: 200 g / ml, the reaction time is 1.5 h;

[0039] (3) After the filtering process, the reaction is completed, and the filtrate and filter residue are filtered, and the nickel iron pulverization is added to the filtrate to carry out a small amount of copper from the liquid in the filtrate, and filter it again to obtain nickel Iron. Copper filtrate, nickel-iron returning to step (2), a high pressure acid immersion, circulating several times of cycling, a high copper content of nickel-iron sl...

Embodiment 3

[0045] A nickel iron wet treatment method, the specific process is:

[0046] (1) Raw material pretreatment, nickel iron is broken into powder or granulated nickel iron.

[0047] (2) a high pressure acid immersion, in a high pressure oxygen environment having a closed pressure of 5.0 MPa, a temperature of 70 ° C, a deterioration of step (1) obtained by concentration of 5 mol / L, and an oxalic acid is added to give a mixture The slurry, the solid-liquid ratio of the mixed slurry is 1: 300 g / ml, the reaction time is 3 h;

[0048] (3) After the filtering process, the reaction is completed, and the filtrate and filter residue are filtered, and the nickel iron pulverization is added to the filtrate to carry out a small amount of copper from the liquid in the filtrate, and filter it again to obtain nickel Iron. Copper filtrate, nickel-iron returning to step (2), a high pressure acid immersion, circulating several times of cycling, a high copper content of nickel-iron slag, normal pres...

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PUM

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Abstract

The invention discloses a wet treatment method for ferronickel and application thereof; and the treatment method comprises the following steps of: in a high-pressure oxygen environment, mixing crushed ferronickel, sulphuric acid and a corrosion aid, performing acid leaching reaction, performing solid-liquid separation on slurry after acid leaching, adding an oxidizing agent into the obtained filtrate, performing heating, removing the corrosion aid, adding a precipitator into the filtrate, controlling the pH value of the filtrate, and performing solid-liquid separation to obtain ferric hydroxide precipitate and nickel-containing filtrate; and performing extraction and back extraction on the nickel-containing filtrate to prepare battery-grade nickel sulphate. According to the invention, the ferronickel is subjected to oxidation acid dissolution in cooperation with the corrosion aid under the high-pressure oxygen and acidic conditions; the ferronickel is extremely prone to oxidation in the high-pressure oxygen environment; and a strong oxidant is added into the filtrate subsequently, so that ferrous ions in the filtrate are completely converted into ferric ions, the corrosion aid can be oxidized to generate pollution-free carbon dioxide and water, and the influence of the corrosion aid on the subsequent extraction process is avoided.

Description

Technical field [0001] The present invention belongs to the field of metallurgical technology, and is specifically related to a nickel iron wet treatment method and its application thereof. Background technique [0002] At present, there are still not many methods for nickel-iron value-added, and the related art discloses a method of preparing nickel sulfate solution and cell-level phosphate containing nickel-based iron, including the following steps: raw material pretreatment, acid immersion treatment, precipitation treatment, iron phosphate Drying treatment, nickel-containing filtrate extraction and removal to obtain a nickel sulfate solution. Although the method has a simple process, the recovery of nickel-containing steel is high, the cost is low and the product performance is characterized, but the reaction is slow and long, and the time is long. Inventive content [0003] The present invention is intended to address at least one of the technical problems present in the pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/38C01G53/10C22B23/00
CPCC22B7/007C22B23/043C22B23/0469C01G53/10Y02P10/20
Inventor 余海军谢英豪李爱霞张学梅李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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