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Method for preparing zinc ferrite

A zinc ferrite, zinc iron technology, applied in chemical instruments and methods, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problem of long processing time, small product particle size, reaction temperature and oxidation time. In order to achieve the effect of high comprehensive utilization of resources, improved economic benefits of enterprises, and convenient source of raw materials

Inactive Publication Date: 2017-09-01
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantages are: convenient operation, simple equipment, easy to control the particle size, etc.; the disadvantages are: the ratio of reaction raw materials, reaction temperature and oxidation time have a greater impact on zinc ferrite
Its advantages are: low process temperature, high product purity, small product particle size, uniform dispersion; disadvantages: difficult control of process conditions, long processing time, organic raw materials are harmful to human body
These methods only recover the zinc in the dust, the comprehensive utilization rate of resources is low, and the economic benefit of dust treatment is poor

Method used

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  • Method for preparing zinc ferrite
  • Method for preparing zinc ferrite
  • Method for preparing zinc ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] according to figure 1 As shown, take 10g of the electric furnace steelmaking dust, add 4mol / L HCl solution to it, stir and leach for 2 hours at a liquid-solid ratio of 4:1 at 60°C, filter, press H 2 o 2 with Fe 2+ Add H to the filtrate at a molar ratio of 2:1 2 o 2 , after reacting for 0.5 hours, NaF was mixed according to the concentration ratio of the substances in the solution to F + : Ca 2+ =2.5:1.0 Add to the above oxidized liquid to purify and remove impurities, keep the temperature at 60°C, stir for 1 hour, after filtering, add ZnCl to the filtrate 2, control the concentration ratio of zinc and iron in the purified liquid to Zn:Fe=0.6:1.0, add NaOH solution, adjust the pH value of the solution to 11, keep the temperature at 75°C, stir for 1 hour, filter and wash the zinc-containing After the iron precipitate was dried, it was calcined at 700°C for 6 hours to obtain 4.23g of zinc ferrite powder product, the composition of which was Zn 27.09, Fe 46.16, O 26.7...

Embodiment 2

[0039] according to figure 1 As shown, take 10g of the electric furnace steelmaking dust, add 3mol / L HCl solution to it, stir and leaching for 2.5 hours at a liquid-solid ratio of 5:1 at a temperature of 70°C, filter, press H 2 o 2 with Fe 2+ Add H to the filtrate at a molar ratio of 2:1 2 o 2 , after 0.5 hours of reaction, the NH 4 F according to the concentration ratio of the substance in the solution F + : Ca 2+ =3.5:1.0 is added to the above-mentioned oxidized liquid to purify and remove impurities, keep the temperature at 50°C, stir for 1.5 hours, after filtering, add ZnO to the filtrate, and control the concentration ratio of zinc and iron in the purified liquid to Zn: Fe=0.55:1.0, add NH 3 ·H 2 O solution, adjust the pH value of the solution to 9.5, keep the temperature at 65°C, stir for 1.5 hours, filter and wash the zinc-containing iron precipitate, after drying, calcinate at 600°C for 8 hours to obtain 4.05g of zinc ferrite powder The composition of the prod...

Embodiment 3

[0041] according to figure 1 As shown, take 10g of the electric furnace steelmaking dust, add 3.5mol / L HCl solution to it, stir and leaching for 1.5 hours at a liquid-solid ratio of 7:1 at a temperature of 50°C, filter, press H 2 o 2 with Fe 2+ Add H to the filtrate at a molar ratio of 2:1 2 o 2 , after reacting for 0.5 hours, KF is compared to F by the concentration ratio of substances in the solution + : Ca 2+ =3.0:1.0 Add to the above oxidized liquid to purify and remove impurities, keep the temperature at 70°C, stir for 1 hour, after filtering, add ZnCO to the filtrate 3 , the concentration ratio of the zinc-iron substance in the purified liquid is controlled at Zn:Fe=0.5:1.0, adding Na 2 CO 3 Solution, adjust the pH value of the solution to 8, keep the temperature at 75°C, stir for 1 hour, filter and wash the zinc-containing iron precipitate, after drying, calcinate at 650°C for 7 hours to obtain 4.36g of zinc ferrite powder product , its composition by mass perce...

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Abstract

The invention discloses a method for preparing zinc ferrite. The method is characterized by comprises the following steps: by taking electric steelmaking dust as a raw material, adding an HCl solution, performing stirring leaching at 50-70 DEG C, filtering, adding H2O2 in a mole ratio of H2O2 to Fe<2+> of (1-3): 1, adding a fluoride salt solution into an oxidation liquid in a concentration ratio of substances F<+> to Ca<2+> of (2.5-3.5):1, performing purification and decontamination, supplementing zinc-containing substances, controlling the concentration ratio of zinc and iron substances Zn and Fe in the purification liquid to be (0.5-0.6): 1.0, adding inorganic base, adjusting the pH value of the solution to 8-11, filtering, washing zinc-iron precipitate, drying, and calcining for 6-8 hours at 600-700 DEG C, thereby obtaining a zinc ferrite powder product. The method disclosed by the invention is convenient in raw material obtaining, high in comprehensive utilization rate of resources, low in raw material cost, simple in equipment and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of preparation of zinc ferrite materials, and relates to a preparation method of zinc ferrite, in particular to a method for preparing zinc ferrite by using electric furnace steelmaking dust. Background technique [0002] Zinc ferrite (ZnFe 2 o 4 ) is a positive spinel structure and is an important functional material. It is widely used in magnetic storage, biomedicine, photocatalysis, and gas sensor due to its excellent magnetic properties, electrical properties, wave absorption and photocatalytic properties. sense, electrochemistry and other fields. [0003] At present, the preparation methods of zinc ferrite mainly include: chemical co-precipitation method, sol-gel method, hydrothermal method, high-energy ball milling method, self-propagating high-temperature synthesis method, template method, etc. [0004] The co-precipitation method is to add the precipitant to the Zn-containing 2+ , Fe 3+ Co-preci...

Claims

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Application Information

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IPC IPC(8): C01G49/00H01F1/11H01F1/36H01F41/00
CPCC01G49/0063C01P2002/72C01P2004/03H01F1/11H01F1/344H01F1/36H01F41/00
Inventor 张荣良张小飞汪红稽立磊张阳杨志彬
Owner JIANGSU UNIV OF SCI & TECH
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