Method for preparing alsifer from high-alumina fly ash and magnetic beads

Abstract

The invention discloses a method for preparing AL-Si-Fe alloy by utilizing high-aluminum fly ash and magnetic beads, which relates to the technical field of nonferrous metallurgy. The method comprises the following steps: 1) a bauxite raw material and a reducing agent-bituminous coal are crushed, and the crushed materials and raw materials (the high-aluminum fly ash and the magnetic beads) are sent into a mixing pan; 2) an adhesive-clay and a certain amount of water are added into the mixing pan to mixedly roll the materials; 3) the materials which are mixedly rolled evenly enter a twinroller machine for granulation; 4) pellets which come from the twinroller machine enter a drying kiln for drying; 5) the dried pellets are added into a submerged arc furnace for high-temperature smelting; and 6) molten iron is taken out of the furnace, and an ingot mold is cast to obtain the AL-Si-Fe alloy. The method has the advantages of broad raw material source, low production cost, good performance of the pellets containing fly ash, even furnace-entering smelting constituents, and complete reaction, makes the submerged arc furnace keep good furnace condition, ensures that the produced AL-Si-Fe alloy has steady performance, and realizes the resource utilization of waste.

Description

technical field [0001] The invention relates to a production method of an aluminum-silicon-iron alloy, in particular to a method for preparing an aluminum-silicon-iron alloy by using high-alumina fly ash and magnetic beads. Background technique [0002] As a compound deoxidizer, aluminum silicon ferroalloy is widely used in steelmaking plants. The density of Al-Si-Fe alloy is higher than that of pure aluminum, it is easy to enter the molten steel, and the internal burning loss is less, and the utilization rate of aluminum in the steelmaking process is more than double that of using pure aluminum as a deoxidizer. The products with low melting point are formed by Al-Si-Fe alloy deoxidation, which can easily float to the surface of molten steel, reduce impurities in steel, have the effect of pure molten steel, and improve the quality of steel. [0003] The production methods of aluminum silicon ferroalloy include electrothermal method, remelting method and heat conversion meth...

AI Technical Summary

Problems solved by technology

However, with this process, the alumina content in fly ash is generally low, and only fly ash or fly ash and bituminous coal are used to form pellets. Other raw materials such as bauxite and steel chips must be added outside the furnace, so that the input The composition of the charge for smelting in the furnace is not uniform, which may easily lead to insufficient reaction

Due to the light specific gravity, poor air permeability and low compressive strength of fly ash pellets, the pellets are easily damaged at high temperature, resulting in material collapse, deterioration of furnace conditions, and unstable product performance.

Moreover, the price of steel shavings is higher, which increases the production cost

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