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A method for synthesizing co-doped nickel ferrite soft magnetic material with laterite nickel ore

A technology of laterite nickel ore and soft magnetic material, applied in the field of magnetic materials, can solve the problem of high cost and achieve the effects of easy operation, wide source and high comprehensive utilization rate

Active Publication Date: 2015-09-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the raw materials for preparing ferrite materials are mainly analytically pure salts (P.Sivakumar, R.Ramesh, A.Ramanand, S.Ponnusamy, C.Muthamizhchelvan, Mater.Res.Bull..46(2011), 2208 -2211.), the cost is very high, and the preparation of synthetic ferrite materials from cheap low-grade laterite nickel ore has not been reported

Method used

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  • A method for synthesizing co-doped nickel ferrite soft magnetic material with laterite nickel ore
  • A method for synthesizing co-doped nickel ferrite soft magnetic material with laterite nickel ore
  • A method for synthesizing co-doped nickel ferrite soft magnetic material with laterite nickel ore

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Embodiment Construction

[0015] 1. Raw material selection

[0016] The raw material is saprolite type lateritic nickel ore, and its chemical analysis results are shown in Table 1:

[0017] Table 1: Chemical composition of saprolite-type lateritic nickel ore (wt.%)

[0018]

[0019] 2. Synthesis steps: see figure 1

[0020] (1) Dry the saprolite-type lateritic nickel ore in an oven at 105°C for 24 hours, and then grind the ore to 100 mesh.

[0021] (2) Mix finely ground saprolite-type lateritic nickel ore with 2.5mol·L -1 Hydrochloric acid was added into the reaction kettle according to the solid-to-liquid ratio of 1g:6ml, the reaction kettle was sealed, and it was heated to 200°C for 8 hours. After cooling to room temperature, solid-liquid separation is carried out to obtain a leaching solution with n(Fe):n(Ni, Co, Mn)=2.0 in the solution.

[0022] (3) Put the above leaching solution in the reaction kettle, and use 1.0mol·L -1 Adjust the pH of the NaOH solution to neutral (7.0), seal the reac...

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Abstract

The invention discloses a method for preparing a co-doping nickel ferrite soft magnetic material by using a saprolite type nickel laterite ore as a raw material, and belongs to the field of a magnetic material. The raw material for synthesizing the co-doping nickel ferrite soft magnetic material is the nickel laterite ore. The preparation method comprises the following steps: drying and grinding the nickel laterite ore, then mixing nickel laterite ore powder with acid, thus obtaining leachate meeting conditions by pressing and acid leaching; adjusting the pH value of the leachate put in a reaction kettle, then heating to an appointed temperature, and carrying out heat preservation for a certain time; centrifuging, and washing so as to obtain precipitates; and drying and grinding the precipitates, and calcining precipitate powder so as to obtain the co-doping nickel ferrite soft magnetic material. The preparation method has the beneficial effects that valuable metallic elements Ni, Co, Mn, Fe and Mg in the nickel laterite ore are fully utilized, the comprehensive utilization of resources is realized, the raw materials are low in cost, and the technology is simple and easy to operate. The composite ferrite soft magnetic material prepared by adopting the method has excellent magnetic property.

Description

technical field [0001] The invention belongs to the field of magnetic materials, in particular to a method for preparing synthetic ferrite soft magnetic materials from saprolite type laterite nickel ore. Background technique [0002] Laterite nickel ore is the world's largest nickel resource, accounting for about 70% of the world's nickel reserves, and contains iron, magnesium, silicon, nickel, cobalt, manganese and other elements. Among them, nickel content is generally 1%-3%, and other substances account for 97%-99% of laterite nickel ore. Generally speaking, the treatment process of laterite nickel ore (including pyrometallurgy and hydrometallurgy) only focuses on the recovery of nickel with a low content in the ore, and some also recover iron and cobalt, and other substances become industrial solid waste The discharge not only causes a waste of useful resources, but also takes up space, causes geological pollution, and brings huge threats and hidden safety hazards to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/26
Inventor 郭敏高建明张梅闫治开刘静
Owner UNIV OF SCI & TECH BEIJING
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