Aluminum-manganese alloy deoxidizing agent and steelmaking deoxidizing method thereof

Abstract

The invention discloses an aluminum-manganese alloy deoxidizing agent and a steelmaking deoxidizing method thereof. The aluminum-manganese alloy deoxidizing agent is characterized by comprising, by mass, 40-50% of aluminum, 30-40% of manganese, not more than 3% of inevitable impurity content, and the balance iron. The specific gravity range of the aluminum-manganese alloy deoxidizing agent is 3.0-4.5 g / cm<3>; and the aluminum-manganese alloy deoxidizing agent is in a shape of an ellipsoid, and the particle size range is 10-50 mm. The aluminum-manganese alloy deoxidizing agent has the advantages that (1) the ton product energy consumption is low, and a preparation process is simple; (2) the impurity content in products is small, and no adhering agents are added; (3) the products can be stored for a long time, and the pesting phenomenon is avoided; and (4) the products are large in specific gravity, oxygen in molten steel and top slag can be fast and efficiently removed, and meanwhile part alloying is performed on the molten steel; and compared with traditional deoxidizing agents such as titanium aluminum, silicon aluminum barium and aluminum iron, 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 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, deoxidized alumi...

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