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Method for preparing nickel-zinc ferrite through pressure acid leaching of sulfide ore

A technology of nickel-zinc ferrite and sulfide ore, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve the problems of difficult mixing of materials, large powder particles, high production costs, etc., and achieve good airtightness , Reduce the iron removal process, the effect of low cost

Inactive Publication Date: 2021-09-24
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production cost of this method is higher than that of the oxide method;
[0005] In summary, the oxide method of nickel-zinc ferrite has disadvantages such as high reaction temperature, difficulty in mixing materials evenly, large powder particles are not conducive to sintering, slightly poor activity, and large pollution. The precipitation method has the disadvantages of requiring pure metals or metal compounds as raw materials and high production costs.

Method used

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  • Method for preparing nickel-zinc ferrite through pressure acid leaching of sulfide ore
  • Method for preparing nickel-zinc ferrite through pressure acid leaching of sulfide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] According to the nickel zinc ferrite formula Ni 0.6 Zn 0.4 Fe 2 o 4 Weigh a certain proportion of nickel sulfide concentrate (Ni content 6.56%, Fe content 26.19%) and zinc sulfide concentrate (Zn content 50.08%, Fe content 6.77%), add the two minerals and a certain amount of sulfuric acid solution Into the autoclave, feed oxygen, and control the conditions of pressurized acid leaching: liquid-solid ratio 6:1, initial sulfuric acid concentration 180g / L, time 1.5h, temperature controlled at 160°C, pressure 0.8MPa, stirring rate 600r / min. The leaching rates of nickel, zinc and iron were 95.54%, 99.42% and 82.05%, respectively.

[0050] The leached pulp is filtered, the filter residue is washed and stockpiled, the washing water is returned to the oxygen pressure acid leaching process, the ferric iron in the solution is reduced with the raw material sulfide ore as the reducing agent, and the reduced filter residue is returned to the pressure leaching process for leachin...

Embodiment 2

[0052] According to the nickel zinc ferrite formula Ni 0.6 Zn 0.4 Fe 2 o 4 Weigh a certain proportion of nickel sulfide concentrate (Ni content 6.56%, Fe content 26.19%) and zinc sulfide concentrate (Zn content 50.08%, Fe content 6.77%), add the two minerals and a certain amount of sulfuric acid solution Into the autoclave, feed oxygen, and control the conditions of pressurized acid leaching: liquid-solid ratio 5:1, initial sulfuric acid concentration 220g / L, time 2h, temperature controlled at 200°C, pressure 1.2MPa, stirring rate 600r / min. The leaching rates of nickel, zinc and iron were 98.78%, 99.61% and 81.67%, respectively.

[0053] The leached pulp is filtered, the filter residue is washed and stockpiled, the washing water is returned to the oxygen pressure acid leaching process, the ferric iron in the solution is reduced with the raw material sulfide ore as the reducing agent, and the reduced filter residue is returned to the pressure leaching process for leaching....

Embodiment 3

[0055] According to the nickel zinc ferrite formula Ni 0.35 Zn 0.65 Fe 2 o 4 Weigh a certain proportion of nickel sulfide concentrate (Ni content 6.56%, Fe content 26.19%) and zinc sulfide concentrate (Zn content 50.08%, Fe content 6.77%), add the two minerals and a certain amount of sulfuric acid solution Into the autoclave, feed oxygen, and control the conditions of pressurized acid leaching: liquid-solid ratio 6:1, initial sulfuric acid concentration 200g / L, time 1.5h, temperature controlled at 160°C, pressure 1.0MPa, stirring rate 600r / min. The leaching rates of nickel, zinc and iron were 97.73%, 99.78% and 83.16%, respectively.

[0056] The leached pulp is filtered, the filter residue is washed and stockpiled, the washing water is returned to the oxygen pressure acid leaching process, the ferric iron in the solution is reduced with the raw material sulfide ore as the reducing agent, and the reduced filter residue is returned to the pressure leaching process for leach...

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Abstract

The invention discloses a method for preparing nickel-zinc ferrite by pressure acid leaching of sulfide ore. The method comprises the following steps of, 1, weighing nickel sulfide concentrate and zinc sulfide concentrate in a certain proportion according to the mass ratio of three components of nickel, zinc and iron in a nickel-zinc ferrite product, adding the two minerals and a certain amount of sulfuric acid solution into an autoclave, and introducing oxygen, pressurizing, heating and stirring. The method for directly preparing the nickel-zinc ferrite from raw ore is advanced in process, high in leaching rate of valuable metal nickel, zinc and iron, low in cost, simple and convenient in operation, continuous in production, small in environmental pollution and high in heat utilization rate, is suitable for nickel sulfide concentrates and zinc sulfide concentrates with various contents, and is particularly suitable for the high-iron nickel sulfide concentrates and the high-iron zinc sulfide concentrates of which nickel and iron and zinc and iron are difficult to be separated, waste iron in the raw ore is changed into raw materials, the resource utilization rate is greatly increased, the purification process is shortened, and economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of a method for preparing nickel-zinc ferrite, in particular to a method for preparing nickel-zinc ferrite by pressurized acid leaching of sulfide ore. Background technique [0002] Soft magnetic ferrite is the most widely used and the largest production of non-metallic magnetic materials in ferrite. Its main features are high resistivity, low residual magnetic flux density and coercive force, and good high frequency characteristics. . Nickel-zinc ferrite is one of the soft magnetic ferrites. Compared with the most commonly used manganese-zinc ferrite, it has the advantages of excellent high-frequency characteristics, good temperature stability, and large nonlinearity. It is widely used in mid-cycle transformers, magnetic heads, short-wave antenna rods, tuning inductive reactors, and magnetically saturated amplifiers. At present, the mainstream production processes of nickel-zinc ferrite include oxide meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/44C22B19/20C22B23/00C01G53/00
CPCC22B3/08C22B3/44C22B19/22C22B19/26C22B23/043C01G53/006Y02P10/20
Inventor 罗文波罗勋甘胤郑凯张琼周东波洪开发谢瑶
Owner GUIZHOU INST OF TECH
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