Fe2O3@Ni composite powder with core-shell structure and preparation method thereof

Abstract

The invention relates to Fe2O3@Ni composite powder with a core-shell structure and a preparation method thereof. Fe2O3 powder is alternately washed in sodium hydroxide solution and diluted sulfuric acid and dried to obtain dried Fe2O3 powder. Complexing agent solution and nickel salt solution are stirred under the water batch condition to obtain plating liquid I; the PH value is adjusted within 9-13; and stabilizing agents are fed to obtain plating liquid II. The dried Fe2O3 powder is fed in the plating liquid II, and reducing agents are fed at an uniform speed to obtain coating liquid. The coating powder liquid is washed by using de-ionized water, dried and insulated by 1-3 h under the condition of 400-700 DEG C in a protective atmosphere to prepare the Fe2O3@Ni composite powder with thecore-shell structure. The Fe2O3@Ni composite powder with the core-shell structure has the characteristics of simple process and low cost; and the Fe2O3@Ni composite powder with the core-shell structure prepared by using the method is uniform in component and excellent in catalysis effect.

Description

Technical field [0001] The invention belongs to Fe 2 O 3 @Ni composite powder technology field. Specifically related to a core-shell structure Fe 2 O 3 @Ni composite powder and its preparation method. Background technique [0002] Carbon-containing refractories are widely used in the metallurgical industry due to their excellent resistance to slag erosion and thermal shock temperature. Carbon-containing refractories mainly include magnesium-carbon refractories, aluminum-carbon refractories and silicon carbide refractories. Among them, magnesia-carbon refractories and aluminum-carbon refractories are the most widely used in the steel industry, such as converters, RH refining furnaces and equipment for continuous casting. However, with the development of clean steel smelting, low energy consumption, and environmental protection, the carbon-increasing behavior in the smelting process and the non-renewability of graphite resources have led to the development of carbon-containing re...

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Problems solved by technology

The above results show that although the addition of transition group metal salts in phenolic resin can improve the degree of graphitization of phenolic resin, the effect is not ideal, the particle size and morphology of the introduced catalyst are uncontrollable, and the activity of the catalyst is low. Excess catalyst (≥3wt%) will react with the matrix to form a low-melt phase, reducing the high-temperature performance of the refractory

At the same time, the C decomposed during the pyrolysis of phenolic resin x h y The components are complex, and it is difficult for a single catalyst to catalyze a variety of hydrocarbon gases

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