Aluminum manganese alloy deoxidizer for steelmaking, and steelmaking deoxidization method thereof

Abstract

The invention discloses an aluminum manganese alloy deoxidizer for steelmaking, and a steelmaking deoxidization method thereof. The aluminum manganese alloy deoxidizer is characterized by comprising the following components: 60%-70% of aluminum, 15%-25% of manganese, no more than 3% of inevitable impurities and the balance iron; the specific gravity range of the aluminum manganese alloy deoxidizeris 3.0-4.5 g / cm<3>; and the aluminum manganese alloy deoxidizer is ellipsoidal, and the particle size range is 10-50 mm. The aluminum manganese alloy deoxidizer has the advantages that (1), the energy consumption per ton of products is low, and the preparation process is simple; (2), the content of the impurities in the products is low, and no binder is added; (3), the products can be stored fora long time, and no pulverization phenomenon occurs; (4), the specific gravity of the products is large, oxygen in molten steel and top slag can be removed quickly and efficiently; meanwhile, the molten steel is subjected to alloying partially; and compared with traditional titanium aluminum, silicon aluminum barium and ferro-aluminium deoxidizers, the aluminum manganese alloy deoxidizer has the beneficial effects that the deoxidizing capacity is high, and the purposes of purifying the molten steel and improving the molten steel quality can be achieved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to an aluminum-manganese alloy deoxidizer for steelmaking and a steelmaking deoxidation method thereof. Background technique [0002] The main function of the deoxidizer used in steelmaking is to react with dissolved oxygen in molten iron to form non-metallic compounds, which form precipitates and float to the slag layer for removal to obtain pure molten iron. Aluminum can be used as a deoxidizer, grain refiner and alloy additive in the steelmaking process. Its application forms are aluminum wire (wire feeding method), small aluminum ingot, aluminum ring, aluminum cake (input method), aluminum shot, aluminum Bullets (launching method), aluminum-iron block, aluminum-silicon-barium-iron block (composite deoxidation method), etc. Existing aluminum wires are generally produced by cable factories using primary aluminum ingots by smelting, extrusion or rolling processes, ...

AI Technical Summary

Problems solved by technology

During the crushing process, about 10% of the total under-sieve powder is produced. This part of the under-sieve powder is often remelted by remelting, or used as a raw material, but no matter what method is used, the energy consumed is relatively high. Large, poor environmental protection effect

[0005] For the above two types of raw materials, some companies used to melt them in intermediate frequency furnaces to produce aluminum-manganese alloys. This alloy has the characteristics of high specific gravity and high utilization rate of metal aluminum and manganese. The disadvantage is that the energy consumption in the smelting process is high. Part of the metal aluminum will be oxidized when smelted at high temperature, which makes the aluminum-iron alloy produced by this method high in cost, which is not suitable for the current development concept of green environmental protection