High Level Material Ferro Silicon Aluminum

The method of preparing ferro silicon aluminum from iron tailings belongs to the field of flocculant preparation technology. The main contents of the preparation method are as follows: firstly, the iron tailings are acidolyzed, the acidolysis reaction product is filtered to remove the precipitate, the supernatant is extracted, and then hydrogen peroxide is used for oxidation, so that all Fe(II) in the system is converted into Fe(III), and the oxidized system is placed in a water bath for self-hydrolysis to polymerize to obtain polysilicon iron aluminum. The preparation method is based on iron mine tailings as the main raw material, and the polysilicon iron aluminum prepared is suitable for the treatment of high turbidity suspension, domestic sewage and industrial wastewater, the preparation method has low cost, simple process, reduces resource waste and environmental pollution, and has significant economic and social benefits.

1.A method for preparing ferrosilicon aluminum alloy by carbon thermal reduction of fly ash is carried out according to the following steps: fly ash, carbonaceous reducing agent and additives are respectively crushed and screened into fine powder; Fly ash fine powder, carbonaceous reducing agent fine powder and additive fine powder are mixed to make A mixed powder, and water pressure is added to make A pellets; Fly ash fine powder, carbonaceous reducing agent fine powder, additive fine powder and iron-containing substances are mixed to make B mixed powder, and water pressure is added to make B pellets; A pellets and B pellets are dried, mixed in proportion, and then carried out carbon thermal reduction reaction at a temperature of 1400~2200 °C for a time of 30~120min; After separating the slag, the alloy melt is cast. This method improves the recovery rate and economic added value of fly ash, makes full use of silicon, aluminum, iron and other valuable metals in fly ash, reduces resource waste, turns waste into treasure, and realizes the recycling of resources.

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