Rear earth calsibar deoxidizer and preparation technique thereof

Abstract

The invention discloses rare-earth silicon-barium-calcium alloy deoxidizer for steelmaking. The invention is prepared through processing the following raw materials such as calcium carbide, silica dioxide, barium sulfate and rare earth. The process of preparing the deoxidizer comprises evenly mixing the raw materials according to proportioning, feeding into an electric arc furnace, striking with arc, then disintegrating into grains, and packaging with double peritoneal. Compared with the traditional technology, the oxidizer of the invention has the following advantages and effects through adopting the technical scheme that firstly rare-earth silicon-barium-calcium alloy deoxidizer has excellent deoxidizing effect, which effectively increases manganese silicon recovery in liquid steel, andincreases the quality of steel, secondly the flow-ability of liquid steel is increased after using the rare-earth silicon-barium-calcium alloy deoxidizer to purify liquid steel, and the difficulty ofladle nozzle nodulation is solved, and thirdly the deoxidizer has low cost and small piece yardage, which effectively reduces the comprehensive cost of steel industry.

Description

[0001] The technical field [0002] The invention belongs to the technical field of steelmaking deoxidizers, and in particular relates to a rare earth silicon-barium-calcium alloy deoxidizer for steelmaking and a preparation process thereof. Background technique [0003] At present, my country's converter steelmaking mainly produces three series of products: plain carbon steel, low carbon alloy steel and some medium and high carbon steel. Although these three series of products have different requirements for the deoxidation process of molten steel; at present, most of them use aluminum cake, silicon aluminum barium iron, silicon calcium alloy for deoxidation, and some steelmaking enterprises also use calcium carbide for deoxidation. The price of these deoxidation materials High, single function, high risk, especially when calcium carbide deoxidation is used, it is very easy to explode, which is extremely harmful to safety production. During deoxidation of molten steel, there...

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Problems solved by technology

Although these three series of products have different requirements for the deoxidation process of molten steel; at present, most of them use aluminum cake, silicon aluminum barium iron, silicon calcium alloy for deoxidation, and some steelmaking enterprises also use calcium carbide for deoxidation. The price of these deoxidation materials High, single function, high risk, especially when calcium carbide deoxidation is used, it is very easy to explode, which is extremely harmful to safety production. During the deoxidation of molten steel, there are still non-metallic inclusions and the shortcomings of low yields of manganese and silicon

[0004] In the current steelmaking enterprises, the use of traditional deoxidizers to deoxidize molten steel mainly has the following problems: 1. The effect of deoxidation and desulfurization is not ideal, and the recovery rate of manganese and silicon is low; 2. The flow of molten steel is slow, and the ladle nozzle is easy Nodules; 3. Dust will fly when the deoxidizer is put in, which will have a great impact on the working environment and endanger the physical and mental health of steel workers