Steel and aluminum mixed deoxidization alloying agent for steel making and preparation method thereof

Abstract

The invention discloses a steel and aluminum mixed deoxidization alloying agent for steel making and a preparation method thereof. The outer surface of pure aluminum is coated with a layer of steel shell, and according to mass percent, pure aluminum occupies 40 to 90 percent, and steel occupies 60 to 10 percent. The steel shell for coating adopts one of a steel plate, a steel strip or a steel tube. During the processes of steel making deoxidization and alloying, not only the defects that pure metal aluminum is light in ratio during deoxidization alloying, is floated on the top of slag and is easily consumed by steel slag and oxygen in the atmosphere, but also the problem that aluminum in steel core aluminum is easily oxidized and wasted by steel slag due to the aluminum on the outer layerare overcome and solved, the deoxidization effect and recovery rate of aluminum are effectively improved, moreover, deoxidized products are easy to float and remove, and the quality of molten steel isimproved. Compared with steel core aluminum, the steel and aluminum mixed deoxidization alloying agent has the advantages that aluminum consumption can be reduced by 20 percent, and the steel makingcost is reduced.

Description

technical field [0001] The invention relates to a deoxidation alloying agent for steelmaking, in particular to a steel-aluminum mixed deoxidation alloying agent for steelmaking and a preparation method thereof. Background technique [0002] In steelmaking production, oxygen needs to be removed as a harmful element, and in order to remove oxygen in molten steel, a deoxidizer is usually added to molten steel. Due to the strong affinity between aluminum and oxygen, high deoxidation efficiency, relatively low cost, and convenient supply, aluminum deoxidation in the steelmaking industry is currently the most widely used steel deoxidation method. [0003] When aluminum is used for deoxidation, the total oxygen content in the steel is very low, and the oxide inclusions formed are easy to float up and remove. At the same time, the residual aluminum elements from aluminum deoxidation can also refine the grains and improve the performance of steel grades. But in practical applicatio...

AI Technical Summary

Problems solved by technology

However, since the aluminum is wrapped on the outside of the iron core, in the actual deoxidation process, although the problem of light specific gravity of aluminum is solved, there is still the problem of being oxidized and consumed by the atmosphere and slag flowing into the tank, increasing the consumption of aluminum