Method for preparing silumin and Al-Si-Mn-Fe-Ti alloy by using high-aluminum fly ash

Abstract

Preparing silumin and Al-Si-Mn-Fe-Ti alloy with coal ash of high-alumina powder, relates to the technical sphere of non-ferro metals smelting. The steps of the invented process are: 1) deironing from coal ash of high-alumina powder, and breaking separately the bauxite chamotte and reducer boghead coal and oil coke; 2) batching and mixing them; 3) adding adhesive and water to the mixture, globularzing and drying; 4) sending the dried pellet to the stove and smelting in a high temperature to prepare primary alloy; 5) cleaning up of inclusion and gas in the primary alloy by refining and filtering it; 6) adding manganese to the refined alloy and deironing and filtering to prepare the Al-Si-Mn-Fe-Ti allay; 7) adding Al to the deironed and filtered alloy, diluting and casting ingot, to prepare silumin. The invention is characterized in that the investment is a little, the productive cycle is short, the energy consumption is low, and the quality of the alloy is nice.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal smelting, in particular to a method for preparing silicon-aluminum alloys and aluminum-silicon-manganese-iron-titanium alloys by using high-alumina fly ash. Background technique [0002] Silumin, also known as aluminum-silicon alloy, is a metal structure material widely used in modern industry, accounting for about 30% of the total aluminum consumption, mainly used in aerospace, automobile industry, machinery manufacturing, Fields such as military industry and household appliances. At present, silicon aluminum is rapidly expanding into new fields such as construction industry, packaging industry, and vehicle manufacturing industry, and its application development is particularly rapid in industrially developed countries. [0003] The Chinese patent in the prior art, the invention patent with the patent number 01109320.X "New process for producing silicon-aluminum alloys" uses a submerge...

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Problems solved by technology

There is no manufacturer in our country that prepares silicon-aluminum powder by electrothermal method. At present, the preparation of silicon-aluminum powder is made by melting and blending electrolytic aluminum and industrial silicon. The production cycle is long, energy consumption is high, and production cost is high.

However, the production of aluminum by electrolysis needs to make bauxite into alumina first, and then electrolysis to prepare aluminum. Therefore, it is necessary to build alumina and electrolytic aluminum plants, which requires large investment and high energy consumption. This restricts the development of my country's aluminum industry to a certain extent. develop

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