Preparation method of silicon-aluminum iron carbonyl composite catalysts with utilization of iron-bearing waste

Abstract

The invention discloses a preparation method of silicon-aluminum iron carbonyl composite catalysts with utilization of iron-bearing waste. The preparation method of the silicon-aluminum iron carbonyl composite catalysts with utilization of the iron-bearing waste includes the following steps: (1) placing grinding wheel gray iron filings in a beaker, adding dilute nitric acid solutions to the beaker, placing the beaker in a constant-temperature vibrator to vibrate the beaker at constant temperature, and (2) adjusting the pH value of the reaction system to 12, continuing vibrating the beaker at the constant temperature for 30 minutes, then aging the sample, obtaining solid bodies through centrifugal separation, washing the solid bodies to be neutral, drying the solid bodies, grinding the solid bodies, and obtaining the silicon-aluminum iron carbonyl composite catalysts. The silicon-aluminum iron carbonyl composite catalysts produced through the preparation method of the silicon-aluminum iron carbonyl composite catalysts with utilization of the iron-bearing waste can effectively absorb, and catalytically degrade dyes, and have the advantages of being wide in pH application rang, and recoverable in use.

Description

【Technical field】 [0001] The invention specifically relates to a method for preparing a silicon-aluminum-hydroxy-iron composite catalyst by using iron-containing waste. 【Background technique】 [0002] In some industrial production, a large amount of iron-containing waste is often produced, occupying space resources, polluting the environment, and affecting human health. For example, tailings, dust removal ash, steel slag, tar slag, blast furnace slag, etc. produced in the ironmaking process have relatively large iron content, among which the iron content of blast furnace dust removal ash is as high as 45%, and the iron content in steelmaking sludge Usually 50%. In addition, in iron ore production and dust removal dust in dust collectors, iron-containing wastes are often produced. If the iron-containing wastes can be utilized as resources, it will not only protect the environment, but also reduce the waste of resources. [0003] FeOOH is one of the most common surface non-m...

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Problems solved by technology

Although these studies have achieved certain results, but for the traditional Fenton (FeOOH / H 2 o 2 ) technology still has limitations: 1) the applicable pH range is small, and it is generally possible to effectively oxidize and degrade pollutants under acidic (pH=2-3) conditions; 2) H 2 o 2 Low utilization rate; 3) The reaction process is prone to produce iron sludge or the recovery rate of catalyst is low

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